Abstract:
Systems for abrasive action include machinery for creating a vacuum and positive pressure to enable flow control while providing adequate vacuum to both retrieve and capture the spent abrasive material and the abraded material. A first embodiment includes a vacuum and boost operation facilitated by the use of a foot control for high control of abrasion, cleaning and polishing. A second embodiment is for use with human tissue and includes a vacuum only system with filtered air. A third embodiment includes vacuum with automatic boost for skilled medical personnel use and uses a minimum vacuum level to trigger a pre-set boost operation. The system utilizes air filtration, ultra violet, heat oven sterilization and secure waste storage. A manual contact tool is used closely with the area to be abraded supplanting any other control other than the pressing of the manual contact tool against the surface to be abraded, to create sufficient vacuum to trigger boost operation. A hand-held direct particle beam abrasion manual contact tool having a prophylactic tip which creates a concentric space within which the kinetics of focussed direct impact and radial collection of spent abrasive particles and abraded material is collectably withdrawn. A flow accelerator within an annular insert of the manual contact tool and prophylactic tip can be varied to suit many applications.

Description:
FIELD OF THE INVENTION 
     The present invention relates to the field of controlled directed abrasion by impact of abrasive particles, and a system for providing advantageous control of the geometry of impact and collection, as well as the process flow conditions, safety and sanitation of the spent abrasive particles and abraded material. 
     BACKGROUND OF THE INVENTION 
     The use of particles to abrade contacted surface areas is well known. Particles can moved by kinetic energy to remove material from other surfaces, as by buffing, polishing, tumbling and by directed flow of particles in a carrier media. The best known large scale example of directed flow of particles in a carrier media is sand blasting. Sand blasting is done using industrial scale equipment, consuming bags of generally screened, but non-uniform size particles. A high air pressure is used to spray the sand on the surface to be impacted, thereby causing abrasion of the surface and with higher pressure cause actual cutting of the material 
     For smaller sized applications, the sand size is more tightly uniform. For indoor use, and for reasons of cleanliness and sanitation, the collection of spent sand must also be accommodated. In U.S. Pat. No. 5,037,432, a hand held device which facilitates the collection of spent sand is illustrated. In this device it is stated as an essential element, that the flow of sand impinge upon the surface to be abraded at an inclined angle. In fact, the device of this patent is designed primarily toward the circularity of the return path of the spent sand, and provides an opening for abrasion as part of the circular path of travel of the abrading material. Abrasion is caused by having the abrading material pass laterally by the surface of material to be abraded and by a sloughing action removes material. The material is removed in a non-linear fashion with most material removed at the upstream end of exposure of the surface to be abraded in the path of circular flow of the abrading material. The abrasion of the material surface downstream of the initial contact is caused by tumbling of the media and further mixed sloughing. Because of the shallow angle of attack, at least half or more of the kinetic energy in the particles is used to move them along in a tumbling fashion end over end, meaning that less than half of the kinetic energy of the particles can be applied to abrade the target surface. These design characteristics makes the tool inefficient and limits its use for various applications. Further, such inefficient use translates into the wasting use of abrading material. Three to five times as much abrading material will be used to remove a given amount of material to be removed as would otherwise be necessary. 
     Control of the flow of the abrasion material is critical for small scale applications and especially where delicate work is to be performed. As such the control system should be able to produce a smooth and even control of abrasive force to be applied. The tool should facilitate accurate control by allowing an even and proportional application of force. Removal of abraded material should occur through impact, and not inefficient lateral sloughing and trough digging. 
     Further, because the stream of flowing particles abrades the surface at an angle, a sharp focus cannot be achieved. Etch writing or other closely tolleranced work cannot be performed both due to the spreading of the stream of abrasive media, as well as due to uneven application of energy to the abraded surface. 
     Another problem with conventional abrasion devices is the creation of pollution in that the abraded material is not always safely collected and isolated. For example, industrial paint stripping operations with lead based paint in which the removed material is allowed to settle like ordinary dirt can provide ground contamination both around the plant and at the land fill. In addition, where the abrasive material and removed material are not collected for safe disposal, workers are exposed to airborne contaminants. 
     Filtering the abraded waste material along with the particulates of the abrasive material presents an especial problem. In most cases the size of the abraded waste material will vary in size from flakes larger than the abrasive material, to a fine powder much smaller than the abrasive material. Collection must be had with extreme filtration of the most fine particles, but also without having to provide an expanded surface filter which must be changed continually over a series of short periods of time. Collection of the spent abrasive material may also result in its being treated to remove the abraded material and then recycled, if such is economically feasible. 
     Control and isolation of abraded material is even more of an issue in medical applications where the abrasive material is used to remove skin in medical procedures involving active acne, acne scars, blackheads, tattoos, or other skin conditions such as psoriasis and exema. Skin removal must be done gently to avoid cutting the skin and abrading past the point where blood vessels are encountered. Skin as abraded material should be isolated and prevented from re-use without having formal sterilization and re-processing. All abraded skin should be treated as contaminated medical waste and should be collected into a waste collection space which includes a sealed container with back flow protection and ultimately formal destruction and proper disposal. 
     SUMMARY OF THE INVENTION 
     The system of this invention includes machinery for both creating a vacuum and positive pressure to enable a wide range of control while providing adequate vacuum throughout the range to both retrieve and capture the spent abrasive material and the abraded material. A first embodiment of the system includes a vacuum and boost operation facilitated by the use of a foot control and which is especially useful for high control of abrasion, cleaning and polishing of various surfaces. A second embodiment is for use with human tissue, especially by cosmetological personnel and would include a vacuum only system. A third embodiment includes vacuum and air boost operation and is intended for skilled medical personnel and uses a pre-set minimum vacuum level to enable the boost operation and which allows an operator to use a surface abrading tool which may preferably be a manual contact tool which works closely in contact with the area to be abraded without the need to independently operate a foot pedal control or any other control other than the pressing of the manual contact tool against the surface to be abraded. All embodiments feature a hand-held “direct particle beam abrasion manual contact tool” having a prophylactic tip which creates a concentric space within which the kinetics of focussed impact and collection of the spent abrasive particles and abraded material mix is collectably withdrawn. In terms of geometry within the replaceable plastic cap tip, the tool provides a highly focused and focusable stream of abrasion material and also provides for a concentrically distributed series of removal ports so that the spent abrasive material will be immediately removed from the abrasive material impact area, allowing the full energy of each abrasive particle full contact with the surface to be abraded. The prophylactic tip is inexpensive and replaceable, preferably made of ordinary plastic, and therefore very advantageous where used with any material surface. The prophylactic tip is available with several different sized openings to more finely define the surface area in which the abrasive material may be directed. 
     The manual contact tool comes with a flow accelerator as an annular insert which can be changed. The annular insert can have a longer tip for a more focussed stream of accelerated abrasive impact, or a shorter tip for a wider stream of accelerated abrasive impact. A variety of annular inserts having various internal bore sizes in combination with various tip lengths may be advantageously used with a combination of shapes and sizes of plastic caps to adjust the velocity and flow area of the stream of abrasive material. 
     The prophylactic tip in combination with the even radial distribution of return channels in the hand held tool creates a somewhat toroidal pattern which serves two purposes. First, in combination with the aforementioned “flow accelerator insert” the tip and its design (based upon application) will provide a radial vacuum to the abrasive beam and splay the beam to a predetermined shape prior to impact with the material to be abraded. The second purpose is for even retrieval of spent abrasive and abraded material in a stream that is equally radially pulled in all directions (360°) from dead center of the tip. The full energy in each of the abrasive particles is spent onto the surface to be abraded and the inter particle collisions are minimized or eliminated by design. 
     The system uses both vacuum and a pressurized boost with independent controls so that an operator can quickly control the on and off function, as well has pressure boost(in one configuration operable with an instant response foot control), so that the operator can focus concentration on the area of the object being abraded. 
     A supply canister has a pickup tube having a tiny hole which draws the abrasive material by venturi action into a supply line. The supply canister can operate while the abrasion material supply system is in vacuum only mode or in full pressurized mode. A vacuum bleed valve is used to provide a supply of air carrier to a supply canister while in vacuum mode and which is used as a dampener when the system transitions to pressurized operation. An air inlet adjustment valve controls the amount of shunt air into the material supply canister. When the air inlet supply is off, the air into the supply canister is at minimum and occurring only through the vacuum bleed valve. When the air inlet supply is on, additional air is supplied to the supply canister, and additional flow of abrasive particles results. Under pressurized control, an open condition shunts or diverts air away from the supply canister to buffer and weaken the pressure supplied to the supply canister to shorten the control range. 
     A second valve is used to shunt air into the vacuum line near the end of the vacuum path to likewise control the magnitude of operation under vacuum operation, and which can dampen or limit the air to the supply canister while under air boost operation. This valve is expected to be fully closed under pressure boost operation so that enough vacuum will be present to move abrasion particles and abraded material along the exit line as the pressure causes a higher rate of flow of the particles at the target. A customized three way solenoid valve and vacuum sensor is used to monitor vacuum and will not allow boost operation when the pressure in the tip of the manual contact tool is below a pre-set vacuum level, which will allow the introduction of abrasive media only during conditions when adequate used media scavenging or collection can occur. 
     A specialized set of hollow core fed valves used as the first and second control valves will facilitate an ability of the operator to more easily and linearly control the flow of particles and vacuum. The active core of the valve presents a moving series of sets of apertures to the flow channel as the valve is turned. The total cross sectional area available for flow changes so gradually with regard to the angular displacement of the core, that a smooth, proportional control is achieved, preferably through a 180° rotation of either valve. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The invention, its configuration, construction, and operation will be best further described in the following detailed description, taken in conjunction with the accompanying drawings in which: 
     FIG. 1 is a perspective left side view of a housing for one size of the system of the present invention, about the size of a suitcase, and showing several external features thereof, including the filters, waste canister and pedal operated power boost; 
     FIG. 2 is a plan right side view of system seen in FIG.  1  and illustrating the supply canister, and the manual application tool and vacuum/media line fitting; 
     FIG. 3 is a perspective view of the handset illustrating supply and exit hose, and a removable plastic tip with a predetermined target aperture; 
     FIG. 4 is a sectional view taken along line  4 — 4  of FIG. 4 which shows the supply path and flow restrictor, and two of the radially located return channels which merge into a common channel connected to the return hose; 
     FIG. 5 is an end view of the handset with the plastic tip removed and looking into the supply path, flow accelerator, the radially located return channels; 
     FIG. 6 is an overall schematic view of the first embodiment of the contained direct particle beam flow abrasion system and capable of any combination of vacuum or pressure boost operation; 
     FIG. 7 is a top view of an alternative waste canister system illustrated as a screw type vertically depending from a top plate from which it is difficult to remove spent abrasive material; 
     FIG. 8 is a lateral sectional view of the alternative waste canister system illustrated in FIG. 7; 
     FIG. 9 is a top view of the disposable wast canister seen in FIG. 8; 
     FIG. 10 is a top view of an alternative supply canister system also illustrated as a screw type vertically depending from a top plate; 
     FIG. 11 is a lateral sectional view of the alternative supply canister system illustrated in FIG. 10; 
     FIG. 12 is a perspective view of a cylinder element valve having a single boss and advantageously configured for use with the contained direct particle beam flow abrasion system vacuum control to linearize operation of the system to facilitate proportional analog control by an ordinary operator thereof; 
     FIG. 13 is a side sectional view taken along line  13 — 13  of the valve of FIG.  12  and which illustrates the structure and operation thereof; 
     FIG. 14 is a linearized representation of the location of various sized and placed flow apertures on the cylinder element of the valve of FIGS. 12 and 13; 
     FIG. 15 is a view taken along line  15 — 15  of FIG.  13  and illustrating the position of the cylindrical valve element of the valve of FIGS. 12-14 as it is operated; 
     FIG. 16 is a view similar to that of FIG.  15  and showing angular displacement of the cylindrical valve element of the valve of FIGS. 12-15 as it is operated; 
     FIG. 17 is a perspective view of a cylinder element valve having a pair of oppositely disposed bosses and advantageously configured for use with the contained direct particle beam flow abrasion system to linearize operation of the system air boost control to facilitate proportional analog control by an ordinary operator thereof; 
     FIG. 18 is a side sectional view taken along line  18 — 18  of the valve of FIG.  17  and which illustrates the structure and operation thereof; 
     FIG. 19 is a linearized representation of the location of various sized and placed flow apertures on the cylinder element of the valve of FIGS. 17 and 18; 
     FIG. 20 is a view taken along line  20 — 20  of FIG.  19  and illustrating the position of the cylindrical valve element of the valve of FIGS. 17-19 as it is operated; 
     FIG. 21 is a view similar to that of FIG.  20  and showing angular displacement of the cylindrical valve element of the valve of FIGS. 17-20 as it is operated; 
     FIG. 22 is an overall schematic of a second embodiment of the system of the invention; 
     FIG. 23 is a perspective view of one configuration of a housing especially suited for housing the second embodiment of the invention configured for safe use in the cosmetology field and configured for vacuum-only operation; 
     FIG. 24 is a front view of the housing of FIG. 23; 
     FIG. 25 is a rear view of the housing of FIGS. 23 and 24; 
     FIG. 26 is a perspective view one configuration of a housing for the second embodiment of the invention with vacuum and boost capability, configured for safe use in the medical field and configured for vacuum-only operation; 
     FIG. 27 is a front view of the housing of FIG. 26; and 
     FIG. 28 is a rear view of the housing of FIGS. 26 and 27; 
     FIG. 29 is a plan view of a housing of an ultraviolet purification system with internal baffles to create a serpentine flow in the presence of ultraviolet light; 
     FIG. 30 is a side view of an ultraviolet bulb shown in FIG. 29; 
     FIG. 31 is a side view of the housing of an ultraviolet purification system with internal baffles to create a serpentine flow in the presence of ultraviolet light; and 
     FIG. 32 is a view of a vacuum only system as a third embodiment which incorporates many advantages of the full system seen in FIG. 22, but without the air boost capability, and which is compatible with the housing systems of FIGS.  23 - 25 . 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     The description and operation of the contained direct particle beam flow abrasion system of the present invention will be best described with reference to FIG.  1 . It is believed that the invention will be best explained with respect to a concrete configuration and then with respect to a schematic representation embodied in the configuration shown, and then by variations in aspects of the invention. 
     FIG. 1 is a perspective view of an abraision device with supply and collection, referred to as system  21 . System  21  resides within a housing  23  which may be made of a single trifold length of metal including a base (not seen) and upward folded sides, one of which is seen as side  25 . An electric power cord  27  is seen, as is a separator and separator system shown as a primary filter  29  and a secondary filter  31 . It is understood that there are a myriad of ways in which spent abraisive material and abraded material may be removed from a flowing air stream, including both wet and dry methods, filtering, cyclones, liquid adsorption and the like. Filters are utilized and explained because they are believed to offer the best advantages in a compact, portable system. 
     A waste collection space is provided in the form of a waste cannister  33  which is seen attached to and extending from the side  25 . The waste collection space may be otherwise provided either within or remote from housing  23  or any housing described with regard to this invention. Waste cannister is connected to other components in the system  21  through the wall  25  from which it is supported. A series of vertical connecting rods  35  may be used to hold the waste cannister  33  together and join a top plate  37  and a bottom plate  39  to a cylindrical portion  41  which may be made of glass or other transparent material to give a visual indication of the fullness of the waste cannister  33 . 
     Seen in FIG. 1 are a pair of quick connect fittings  43  and  45  to which are connected hoses  47  and  49  respectively. Quick connect fittings  43  and  45  have release rings which facilitate the insertion and locking of the ends of tubing, which preferably be about 0.375 inch in diameter tubing, and hold it in place. This type of quick release fitting enables quick disengagement of the hoses  47  and  49  by simultaneously pulling the hose while pushing the retaining ring back and into the fitting. 
     A foot pedal control  51  has a quick open valve and actuation of the control  51  puts the hoses  47  and  49  into communication to make a stream of pressurized air available to the abraisive material supply. Atop the housing  23  is a cover plate  53 . Cover plate  53  abuts a front plate  55  which supports most of the controls of the system  21 . 
     Front plate  55  supports an ON/OFF rocker switch  57  which is used to turn the system  21  on and off, but only providing the lockout key is inserted into the lockout safety switch  59  and that the lockout safety switch  59  is closed. At the center of the front plate  55  is a gauge  61  to indicate the amount of vacuum in the system, typically measured from a point downstream of the secondary filter  31 . In addition, guage  61  may also indicate positive pressure in the stream of pressurized air going to the supply of abraisive material, or such a guage may be located elsewhere on the front plate  55 . 
     To one side of the guage  61  a valve handle  63  is surrounded by a series of numerical designations on the front plate  55  which give a visual indication of the displacement of the valve handle  63 . Location is a matter of choice, but this position is typically occupied by the vacuum bleed valve control. To one side of the handle  63  is another similarly located handle  65  which typically controls the inlet shunt for the abraisive material supply feed air, and is referred to as a shunt since it parallels a pressure sensitive check valve typically located inside the housing  23 . 
     Partially seen in FIG. 1 is a supply cannister assembly  71  with a top plate  74 , fill cap  73  and a manual contact tool  75 . It is understood that any surface abrading tool can be used in any of the systems disclosed herein, but that since many of the component parts of the systems disclosed work well with an enclosure placed over the surface to be abraded, and for fullness of disclosure the manual contact tool  75  will be used to demonstrate all of the advantages of the invention. Other surface abrading tools are well known and may be employed with the systems of the invention disclosed herein to result in varying degrees of advantage. A pair of hoses  77  and  79  extend to connect to the tool  75  and are abraisive material supply and return hoses, respectively. 
     Referring to FIG. 2, a right side view gives a better view of structures partially seen in FIG. 1, including the supply cannister  71 . Supply cannister  71  also has a series of vertical supports  35 , three of which can be seen in FIG.  2 . The vertical supports  35  connect top plate  81  to bottom plate  83 . The hoses  77  and  79  which lead away from the tool  75  connect with quick connect fittings to two different locations. Supply hose  77  connects to a quick connect fitting  85  connected to the bottom plate  83 . Return hose  79  connects to a quick connect fitting  87  attached to a side  89  of the housing  23 . 
     Side  89  of the housing  23  also supports a cylindrical support  91  which supports and protects the tool  75  within the support  91 . The support  91  is in essence a stable holding holster in which a technician can place the tool  75  when the tool  75  is not in use. The use of a support will also promote gravity drainage of any particulate abraisive material which may have been located within the tool  75  at the time it is shut off. 
     Referring to FIG. 3, a close up perspective of the tool  75  illustrates a better closeup of a pair of slip fittings  93  and  95 , which connect the hoses  77  and  79 . The tool  75  has a radially expanded portion  99  to accommodate the threaded fittings  93  and  95 . Tool  75  has an elongate shaft to provide a length for accelleration of the abraisive particles in a geometry free of sharp turns to insure that the abraisive particles do not collect and can flow evenly toward a restriction to be shown. The end of the tool  75  is covered by a plastic cap  101 . The cap  101  has an opening  103 . In order for the system tooperate, the opening  103  must be covered t allow the vacuum to pass from non threaded bore  115  to bore  113  of manual contact tool  75 . The opening  103  is placed directly over the area to be abraded. The hemispherical shape of the end of cap  101  facilitates the pencil like manual actuation over the area to be abraded. Other shapes can be used which may be more compatible with the structures to be abraded. 
     Even more importantly, the shape of the opening  103  can be adjusted easily by simply changing the plastic cap  101  having another, but different sized opening  103 , possibly in conjunction to complementary structures elsewhere, to further control the shape and distribution of abraisive particles as they impinge on the target through the opening  103 . The cap  101  is preferably plastic and disposable so that when the tool  75  is used to abrade skin, it can be disposed of to eliminate any contamination either through skin contact on the outside, or abraded skin particles which might be present inside the cap  101  such as adhering to the inside surface thereof. 
     Referring to FIG. 4, a side sectional view of the tool  75  reveals a pair of threaded bores  105  and  107 . When formed as a two piece structure, the tool  75  may have a front section  109  and a rear section  111 . The formation as a section facilitates the formation of the bores within the tool  75  using simpler manufacturing methods, particularly since all of the bores seen in FIG. 4 have angular transitions or distribution points which would otherwise be difficult to achieve if formed as a single component. 
     Threaded bore  105  transitions to a non threaded section of bore  113  which angles toward the center of the rear section  111 . The threaded bore  107  transitions also into a contiguous straight non threaded bore  115  and opens at the end of the rear section  111 . 
     The front section  109  is formed with an outer axially raised rim  119  and an inner axially raised rim  121  which should be raised to at least the same extent as the rim  119  and preferably into the first portion of bore  113  for a good fit. However, an accommodation should be made so that the air and particles flowing through the bore  113  will not experience a reduction in cross sectional flow area. The raised rim  121  creates a chamber  123  which is in communication with the contiguous straight non threaded bore  115 . With this configuration, the front section  109  can sealing attach to the outer periphery of the rear section  111  at the same time that the rim  121  surrounds the peripheral face of the rear section  111  immediately around the opening of the non threaded section of bore  113 . This not only isolates and continues the channel of the non threaded section of bore  113  but insures that the annular chamber  123  is isolated between the rim  119  and the rim  121 . 
     The front section  109  has a center bore  125  and a series of peripheral bores  127 . The center bore  125  has a flow accellerator  129  which is seen as an annular insert  131 . Flow restriction can be accomplished by making center bore  125  of two different internal diameters. However, the use of a separate flow accellerator  129  enables its removal should any unduly large particle block the entrance. The flow accellerator has a conical portion at its front end to set the extent of its insertion within the center bore  125 . Other options include any type of venuri orifice or any structure which effectively boosts the velocity of the materials going through the opening. Both due to the fact that the tool  75  can be disconnected near its middle and that insert  131  is accessible from the end of the tool  75  makes removal of the insert  131  easy to accomplish. 
     In the normal operation, a fast stream of air or other fluid enters the threaded bore  105 , possibly from the fitting  95  and hose  79 . The fluid, preferably a gas, carries abraisive particles along with it. The gas and abraisive particles travel through the bore  113 , across the inner axially raised rim  121  and into the center bore  125 . When the flow accellerator  129  is encountered, the speed of the flow of the gas fluid speeds up to a high speed as it travels through the flow accellerator  129 . The high speed fluid and abraisive particles exit the accellerator  131  and travel through the interval of space between the open end of flow accellerator  129  within the plastic cap  101  and toward the opening  103 . Where the surface to be abraded is covered by the opening  103 , a closed chamber is formed wherein the abraisive material which strikes the surface appearing in the opening  103  may then be urged into the series of peripheral bores  127 , as well as the carrier gas and particles of material which have been abraded from the surface of the structure adjacent the opening  103 . This enclosed process is expected to reach steady state quickly so that none of the abraisive particles nor the abriaded material is expected to collect within the volume enclosed by the cap  101 . Spent abraisive particles and abraded material travel through the peripheral bores and into the chamber  123  and then out through the non threaded bore  115 , through attachment of slip fiting  93  to the hose  77 . The mechanism to produce pressure and vacuum to insure steady state operation will be explained from a systems standpoint, below. 
     Referring to FIG. 5, a front view of the manual contact tool  75  is seen, but without the presence of the plastic cap  101 . The peripheral location of the entrances of the series of peripheral bores  127  are readily seen. The placement of the series of peripheral bores  127  is designed to make even availability of a return path for the spent abraisive particles and abraded material. It is understood that different sizes of plastic cap  101  and opening  103  can be used for different applications. The cap  101  can be made with the opening  103  closer to the open end of the insert  131  for more severe abraision, or it can be made with the open end of the insert  131  spaced significantly from an opening  103 , perhaps even a larger opening  103 . This arrangement would abrade at a slower rate, and over a wider area. 
     Having now seen the external portions of the system  21 , a further explanation of the workings of the system as a whole will facilitate a further understanding thereof. Referring to FIG. 6, a schematic view which is orientated with regard to a downward look onto the housing  23  from the rear is shown. In this way, a schematic explanation can be had with regard to the physical layout of the system  21 . 
     Electrical power is provided to the system  21  with a regular wall outlet  135 . An on/off switch  137  controls power availability into the housing  23 , and may be key controlled in order to keep the system  21  from unauthorized useage. At the heart of the system  21 , a combination vacuum pump and compressor is seen and hereinafter referred to as a vacuum pump/compressor  141  is seen. This device is typically available as a sealed unit with electric motor internally located and has a dual one way check valve arrangement creating a one way air flow action which sucks into at least one port  143  and produces a pressurized output through at least one port  145 . Each half stroke of the piston produces a vacuum at port  143 , while the next half stroke of the piston within the vacuum pump/compressor  141  produces a pressurized output at port  145 . On the physical vacuum pump/compressor  141 , ports which are not used may be simply plugged off. 
     The basic theory of operation with a single vacuum/compressor operating system is that “the motor will always operate with a constant load, and that load should be as small as possible”. Keep in mind that the vacuum/compressor has a single piston operating within a chamber on one side of the piston, the face side. Each stroke of the piston which creates a displacement space in the chamber draws air into the chamber and resistance in the inlet line creates vacuum during this step. As the piston strokes back to reduce the volume of the displacment chamber, compression is created. Air for compression is based upon the air which entered the chamber and which was left over from the vacuum stroke, after the inlet valve closes just at the maximum of the vacuum stroke. Thus the reason that the load will not double is that under maximum vacuum load the compression load is naturally near zero. The maximum compression load can only occur when maximum air intake into the compressor/pump occurs when essentially no vacuum occurs, when the vacuum inlet is at atmospheric pressure. 
     Thus, the vacuum or air section of the vacuum compressor/pump  141  should never otherwise be restricted in any way. The system  21  of the invention uses the vacuum and air control valves as shunt units and not positive control valves which either purposefully starving the vacuum inlet to the compressor/pump  141  or purposefully holding back a buildup of pressure from the outlet of the compressor/pump  141 . 
     The Explanation will begin at the suction port  143 , since the system  21  can operate in a vacuum mode only without the pressure boost from the port  145 . The vacuum port  143  is connected to the pressure guage  61  seen previously in FIG. 1, through a line  147 . The pressure guage  61  simply gives an indication of the degree of vacuum being developed at the vacuum port  143 . A “T” connection connects the line  147  between the pressure guage  61  and the port  143  to one side of a vacuum control valve  149  through a line  151 . The vacuum control valve  149  is a through valve having a fritted or filtered port  153  for which fluid communication is controlled to selectively bleed air into the vacuum line  151 . When vacuum control valve  149  is closed, no air flows throughthe vacuum control valve  149 , and the pressure guage  61  is enabled to develop as much vacuum as the system  21  will otherwise allow based upon flow availability and other factors to be discussed. When the valve  149  is opened, air which passes through the filtered port  153  as well as air from the remaining parts of the system  21  combine to lower the vacuum at port  143  and which is read at pressure guage  61 . 
     Port  143  has a “T” connection which is shown adjacent to the vacuum pump/compressor  141  as line  155 . Line  155  is connected into the secondary filter  31  which is shaped as a cylindrical filter. The line  155  is connected to the secondary filter  31  output. The input to the secondary filter  31  is a connecting line  157  which connects to the output of a primary filter  29 . The input of the primary filter  29  is connected to the output of waste cannister  33  through a line  159 . 
     The waste cannister  3  has a knock-out grid to help separate the abraisive material, which in small sizes can be very light and difficult to separate from the stream of flowing air. A knockout grid deflects incoming abraisive material, enabling it to drop to the bottom of the waste cannister  33 . When skin is abraded, the waste cannister  33  may also have a dye or other security device to insure that users will not attempt to re-use the contaminated abraisive material. 
     The waste cannister  33  has an input connected to a line  161  which is connected to the quick connect fitting  87  through the wall of the housing  23 . As before, quick connect fitting  87  connects to hose  77  and receives the return air, spent abraisive material and abraded material from the abraision reaction within the plastic cap  101 . 
     Again considering the manual contact tool  75  and working in reverse, the hose  79  brings the abraisive material and air from supply cannister  71 . Cannister  71  has a quick connect fitting  85  leading to a vertical tube witin the cannister. The vertical tube has a hole near its bottom extent. As air enters the cannister, either by negative pull from the vacuum or positive air boost pressure, or a combination of both, it flows through the top of the vertical tube. As the air passes the hole near the bottom extent of the vertical tube, abraisive material is drawn through the hole in a proper flow amount. The size of the hole enables control of the air and abraisive mixture. 
     The supply cannister  71  has an input port  163  connected to a tube  165 . The line  165  is connected through a “T” shaped pressure difference inlet check and relief valve  167 , which leads to a first port  169  of an air control valve  171 . The relief valve  167  will allow air into the line  165  upon the existence of a pressure differential of about 0.5 inches of mercury between the pressure in lane  165  and atmospheric. The inlet of the relief valve is from the ambient surrounding or through a filter. 
     Since an explanation should be given first of the simplest system, the vacuum only system will be explained. From the operator&#39;s perspective, the valve handle  63  of vacuum control valve  149 , in order to direct air into the vacuum side of the vacuum pump/compressor  141 , is set to full open to insure that operation starts off at a minimum level. Valve handle  65  of air control valve which is in communication with and lets air into the supply canister  71 , is set to full open, and the foot pedal control  51  is left un-actuated to shunt pressure through its vent. The manual contact tool  75  has the plastic cap  101  in place, with its opening  103  occluded over the area to be abraded in order to help develop vacuum and to make ready for abrading a surface to be abraded. 
     The valve handle  63  of vacuum control valve  149 , is turned in order to begin to starve ambient air from entering into the vacuum side of the vacuum pump/compressor  141 . As this begins to occur, the vacuum developed at the tip of the manual contact tool  75  will be felt through the system  21  at the downwardly extending, “U” shaped venturi tube  275  (see FIG. 11) of the supply canister  267 . Air will be drawn through the vacuum relief valve, if necessary; through tube  165  and into the bottom of the supply canister  267 . The introduction of air into the bottom of the canister  267  is through a structure designed to distribute the air through the media used for abrasion to “excite” the media, keep it from clumping and to keep it fluidized. Air passes from the bottom of canister  271 , between and through the fluidized mass to the top of “U” shaped venuri tube  275 , then picks up media as the air passes through the tube  275  and flows past the small inlet orifice  277 . The abraisive media is carried along in the tube  79  on its way to the manual contact tool  75 . In the manual contact tool  75 , the flow accellerator  129  increases the speed of the abraisive media and air stream to its maximum velocity and energy as it exits the end opening of the annular insert  131 . Once the high speed mixture of abraisive media and air leave the annular insert  131 , it is directed as a particle beam aimed at the opening  103  of the cap  101  to directly strike any surface exposed within the opening  103 . 
     If one parameter in the conditions is changed, overall operation is changed. In “vacuum only” operation, as illustrated above, if the inlet/outlet control valve  171 , in communication with supply canidter  71  is set to a closed position (full on for air boost operation) to shut off the supply of ambient air to the supply canister  71 , and when this occurs in the absense of an air boost from lines  47  and  49 , a vacuum relief valve  167  opens to supply air to the vacuum tube  165  for still permitting operation. The system will, but with a loss of 0.5 inches of mercury due to the pressure drop at the relief valve  167 . 
     Referring again to FIG. 6, the system  21  includes a pressure boost using the pressure port  145  of the vacuum pump/compressor  141 . When the boost is operated, the response to the system  21  from opening and closing the valves  149  and  171  is different. Port  145  of the vacuum pump/compressor  141  provides compressed air through a line  177  to the slip fitting  45 . A hose  49  connects the slip fitting  45  to foot pedal  51 , which is a convienient quick-open/quick-close vent valve. The output hose  47  provides pressurized air in response to operation of the foot pedal  51 . 
     Given that the vacuum pump/compressor  141  may be positive displacement, there are two control possibilities for operation. In one configuration, a constant pressure relief valve is placed in the foot pedal control  51  to keep the supply pressure high and constant. In this configuration, when the foot pedal control  51  is activated, the normally closed valve in the foot pedal control  51  is opened to supply hose  47 . However, this is not the preferred mode of operation. If the presssure were allowed to build, the speed of the drive motor within vacuum pump/compressor  141  would begin to slow down as it works against ever higher pressures, and which would perform more work to provide a high pressure flow of air through a high pressure relief valve. In such a case, the foot pedal would be depressed to open flow into hose  47 . 
     However, to save energy and provide for vacuum pump/compressor  141  to expend the bulk of the energy from its motor in creating vacuum until and when the pressure boost is needed, the foot pedal valve  51  is connected in the opposite sense. When undepressed, the foot pedal valve  51  is in the open position, and the exit port is provided with a filter or diffuser so that air entering from line  175  and hose  49  flows constantly at high volume and low pressure to the foot pedal control valve  51  and out through a diffuser. The diffuser can be selected based upon the pressure drop that it will present, along with the line  175  and hose  49 , virtually no pressure drop to the pressurized air. When the foot pedal control valve  51  is depressed, the pressurized air, instead of escaping to the surroundings, is redirected through the hose  47  as the escape is shut off and the passage to the hose  47  is opened. In this configuration, pressurized air is supplied at about the moment when the ability of the vacuum pump/compressor  141  to create high vacuum would normally be compromised. The boost provided is effective regardless of the exact magnitude of the vacuum and pressure boost, since an effective boost can be considered as a pressure differential applied at the manual contact tool  75 . 
     Pressurized air flowing into quick connect fitting  43  also flows into a line  177  which is connected by a “T” connector into line  165 . The additional pressure applied to line  165  now increases the driving force applied to the supply cannister  71  and manual contact tool  75 . Now, pressurized air is applied upstream forcing air and abraisive material toward the target at the opening  103 , while a vacuum drives the removal of spent abraisive and abraded material. Under purely vacuum operation, the operating differential included any vacuum in line  77  working against atmospheric pressure minus any pressure drop in the air entering through the combination of relief valve  167  and or valve  171 . Under pressure boost conditions, essentially the same vacuum conditions are present, but the increase in the inlet operating pressure is responsible for the increase in driving force of the flow of air and abraisives. 
     Looking again at valves  149  and  171 , it is clear that their operation is different under conditions of pressure boost. Maximum operation under vacuum only (no shunt into the vacuum line to reduce the vacuum) involves the closure of valve  149  and that valve  171  be completely open (full shunt, no air boost). However, when pressure boost is applied through line  177 , increasing air pressure will reverse the flow of air through the valve  171 . Thus, the most powerful operation under conditions of power boost occur when valves  171  and  149  are closed. In this high power setting, foot pedal control valve  51  is used to supply very controlled high pressure blasts of air and abraisive to the manual contact tool. With valves  171  and  149  closed, the only inlet air will be through the relief valve  167 , with no air boost applied. When pressure boost is applied, and since the relief valve  167  is a one way check valve, it shuts instantly. Thus the system  21  of FIG. 6 is then set to operate between a minimum flow with incoming air entering through relief valve  167  and maximum boost pressure and vacuum as relief valve  167  shuts. It would be preferable, in intermittent, foot controlled power boost operation to completely shut off the flow of air through the supply cannister  71 , but too high a vacuum might build, especially if cap  101  is used over skin, and the provision of the relief valve  167  is a safety feature. 
     From a setting of maximum power boost described, the opening of valve  171  will both dampen and narrow the operating range of system  21 . As the valve  171  is opened, the vacuum operation is increased. When the foot pedal control valve  51  is opened, much of the flowing air escapes through the valve  171  which reduces the pressure power delivered to the manual contact tool  75 . Thus the opening of the valve  171  brings operation from between states of maximum power to minimum power operation with the foot pedal control valve  51 , to a state of, for example ⅔ maximum available power to ⅓ maximum available power operation. When the valve  171  is completely open, the power operation will achieve a minimum range between maximum and minimum power operation. 
     Opening of the valve  149  can reduce the amount of vacuum, and thus move the midpoint range of operation when used in conjunction with valve  171 . However, in general, not as much advantage is believed to be derived from opening the valve  149  during power boost operation. In addition, if enough of the vacuum is shunted with valve  149 , there may be insufficient vacuum to pull away and collect the spent abraisive and abraded material. 
     System  21 , without any boost input from hoses  47  and  49 , is a Shunt Vacuum/Air Controlled System. As such the maximum control of the vacuum and air utilized within the system is, from an energy standpoint, from approximately “full on” to “half on” with no significant real control below these levels even though through manipulation of the valves it will appear that the vacuum and air can be turned “off”. This is only an appearance, in vacuum only operation the vacuum control valve  153  only has significant effect on operation within about 20 degrees of rotation of the control valve  153  from maximum. This characteristic has led to the design of special control valves for controlling the vacuum and boost air. 
     Another characteristic of system  21  is that when the system  21  is used with the “air boost” and the foot pedal control  51  pressed to enable the boost, the system  21  can and will blow abrasive media out through the opening  103  of the manual contact tool  75  without any material occluding the opening  103  or lying idle to the side of opening  103  within cap  101 . The use of the foot pedal control  51  poses a risk of discharging media inadvertantly into an area that should not be bathed with abrasive material. Also, if the manual contact tool  75  is removed from coverage of the opening  103  from a position over the material to be abraded prior to releasing the foot pedal control  51 , abrasive media will likely be discharged out of opening  103  of the manual contact tool  75  and can cause harm to the material and the area outside of the area being abraded. 
     The control over the air boost in FIG. 6 is based upon softening the effect of a surge of boost air upon operation of the foot pedal. The earlier mentioned use of a limit valve, such as valve  331  of FIG. 18 in place of the foot pedal control  51  contemplates either removal or non-operation of the boost air control valve. There is not a point in providing smooth controllable flow such as with a valve  331 , while blunting the control with an air control valve  65 . In FIG. 6, removal of the foot pedal control  51 , and replacing with valve  331 , and eliminating and closing off the air control valve  65  and its line will enable measured control, but will eliminate the ability to provide a quick on/off boost. 
     In addition, system  21  does not provide a user friendly method or structure for secure collection for the waste media and abraded material mixture (previously used) drawn from the manual contact tool  75 . The supply of used media may be improperly poured into the supply cannister by an operator, which could in fact contaminate the supply media, or the waste media could be drained out of the bottom of the waste cannister by the operator. This would allow the operator/owner the option of reusing the same contaminated abrasive media by recycling it back into the supply cannister  33  or discarding the used media with possible contamination from the abraded area in the form of abraded material in an unsafe and uncontrolled manner. 
     When used in a medical environment, system  21  described thus far does not address the issue of sterile air flow leading to the incorporation of 0.7 micron filter upstream of the boost air system, a ceramic oven for and ultaraviolet decontamination system for air circulating in the system  21 . Deep abrasion of human tissue might create germicidal and other contaminants which might otherwise circulate in the system  21 . 
     System  21  works well as it is described, and the aforementioned and aftermentioned considerations only relate to specialized environments in which abraision may be performed, and in which other considerations need to be taken into acount, those considerations not addressed by system  21 . Where system  21  is used for simple etching, for example glass or other media for which recycling is acceptable, the system  21  forms an efficient, neat, clean system. For example, where a system  21  is purchased and used by a single same owner, in a shop setting for cleaning or abrading small parts, the lack of controls over the disposition of the supply and waste abraisive is not expected to be a problem. 
     These characteristics of System  21  do not pose a problem for most general applications. Other applications may have a more refined set of needs and caused further invention as an effort to design and develope a new and better flow control system, air boost control system and media supply/waste control management system and air purification sterilization. 
     Referring to FIGS. 7,  8 , &amp;  9 , an alternative waste cannister system is illustrated as a screw type in which it is difficult to remove spent abraisive material. A waste cannister assembly  199 , similar to waste canister  33 , includes a top plate  201 , similar to top plate  37 , has a pair of threaded bores  203  for bolting onto to the housing  23 . The top plate  201  has a pair of tubes extending therefrom, including entrance tube  205  and exit tube  207 . The tube structures have bores  209  and  211  which extend toward the middle of the top plate  201  and then are directed downward. As the tubes extend inward to the middle of the top plate  201 , they may exist as tubes affixed to the bottom of the top plate  201 , or as bores into a solid body of a top plate  201 . 
     In either case, the change in direction helps in separating the abraisive material from the gas stream. In the top plate  37 , for example, a 3-dimensional mesh grid was used to change direction. The same principle is used here, as will be seen. Gas, spent abraisive and abraded material enter the entrance tube  205  and is directed downward. After negotiating structures to be shown, the exit gas which has been filtered, preferably with a 5 micron filter, enters the bore  211  and exits the exit tube  207 . Also seen in dashed line format is the placement of a collection cannister  213  which is supported and sealably engaged. 
     Referring to FIG. 8 a sectional view taken along line  8 — 8  of FIG. 7 is a view looking into the collection cannister  213  illustrates the component parts thereof. Cannister  213  has a metal or plastic outer wall  215  and a top plate  217  into which a series of peripheral holes  219  are punched or bored. An outer ring seal  221  seals the cannister  213  against the top plate  201  to insure that none of the spent abraisive nor abraded material escapes. An inner ring seal  223  isolates a threaded center bore  225  of the canister from the series of peripheral holes  219 . Thus, the material entering through bore  209  hits the top plate  217 , and falls through the peripheral holes  219  and into the space bound by the outer wall  215 . Outer ring seal  221  prevents any of the entering material from escaping from the canister  213 . Inner ring seal  223  isolates the entering material from contacting the exit air stream to be filtered. 
     As can be seen, the bore  211  terminates in a threaded nipple  227  which threadably engages the threaded center bore  225 . In this configuration, the cannister can be threadably unscrewed from the threaded nipple  227  to be easily changed. Circumferentially extending around beneath the top plate  217  is a rubber flapper  231 . Rubber flapper  231  bends downward to give way to the entering air stream, its spent abraisive material and abraded material. 
     Once the abrasion material and abraded material enter the canister  213 , a filter  233  presents an expanded surface area through which the air may freely pass while leaving the solids behind. Even was the canister begins to fill, there is enough surface area of the filter  233  that flow should not be impeded. In addition, some flow can occur through the spent abrasion material once the level has become higher than the filter  233 . In addition, to the extent that the abraded material is smaller than the abrasion material, much of it may be expected to collect at the bottom of the canister  213 . 
     The flapper  231  provides additional passive structure to help separate the air from solid material, and also provides for sealing the internal contents of the canister  213  when air is not flowing through it. Once the abrasion process is stopped, the system  21  can be purged with air, or simply have the supply of abrasion material stopped or allow it to be exhausted. This would clear the abrasion material from the system  21 . When the system  21  is shut down, the canister  213  can be unscrewed from the nipple  227  without any random material lying atop the top plate  217 . In the best operating example, and since the volume of abraded material is expected to be slight with regard to the volume of abrasion particles, a supply canister would be provided having a known quantity of abrasion material. When the material is depleted, the system  21  will sweep itself clean, and it will then be time to change the waste cannister  213  and add a new supply canister. 
     Referring to FIG. 9, details of the top of the canister are shown. Structures which can be seen include top plate  217 , its series of peripheral holes  219 , the outer and inner ring seals  221  and  223 , threaded center bore  225  which engages the threaded nipple  227 , and also the rubber flapper  231  which can be seen through the series of perhiperal holes  219 . 
     Referring to FIG. 10, a supply canister assembly  251 , similar to the supply canister assembly  71 , is illustrated as having a top plate  255  having a pair of blind threaded bores  257  to facilitate connection to the housing  23 . An air inlet tube  259  provides an entrance into an air inlet bore  261  which extends into the body of the top plate  255  either as a continuous tube, or as a bored out volume. An air outlet tube  263  provides an exit from air and abraisive outlet bore  265  which extends into the body of the top plate  255  either as a continuous tube, or as a bored out volume, and which carries a stream of air, along with abraisive material. The outline of a supply canister  267  is shown in dashed line format. 
     Referring to FIG. 11, a sectional view taken along line  11 — 11  of FIG. 10 illustrates the internal structures of the supply canister assembly  251 . The internal structures can be provided as structures permanently fixed with respect to the top plate  255  or detachable as by threaded engagement. In communication with air inlet bore  261  is a downwardly extending puffer tube  271 . The puffer tube  271  causes inlet air to exit at the bottom of the supply canister  267  to introduce a fluidizing action on the particulate abraisive material wihtin the canister  267 . This insures that the abraisive material will always remain free flowing, loose and will not clog or block the feed exit. The puffer tube  271  is shown as having an upper expanded portion  273  which is preferably a threaded fitting for engagement with a matching threaded fitting in the top plate  255 . 
     To the left of the puffer tube  271 , with respect to the view of FIG. 11, and in communication with the air and abraisive outlet bore  265  is a downwardly extending, “U” shaped venturi tube  275 . Venturi tube  275  has a small inlet orifice  277  at the bottom most portion of the “U” shaped bend which pulls in the abraisive material. For abraisive media having a size range of from 50 to 100 microns, a suitable size for the inlet orifice  277  is about 0.045 inches in diameter. The selected size for any application will be a function of the size of the abrasive media and the amount of media to be applied to the surface to be abraded relative to the size of the abrasive media. 
     The venturi tube  275  has an open end  279  which terminates at the end of an upward extent of the tube  275  generally parallel to the downward extent from a fitting  281 . The open end  279  draws air which has percolated up through the abraisive material from the lowermost extent of the puffer tube  271 . As the air rushes through the venturi tube  275 , it causes the abraisive material to be evenly brought through the inlet orifice  277  to create an even air-abraisive material mixture which flows out of the air outlet tube  263  on the way to the manual contact tool  75 . 
     Referring to FIG. 12, a simplified perspective view of a vacuum shunt valve  301  is seen, as one possible configuration of valve to be used for the vacuum control valve  149  of FIG.  6 . Vacuum shunt valve  301  has a main body  303  having a side port  305  including a boss  307  with a threaded internal surface  309 . A handle  311  is provided as a generally linear knob extending both directions away from a center pivot. Valve body  303  has an underside opening  313  indicated by an arrow, and the handle  311  is connected to the internals of the vacuum shunt valve  301  by a valve stem  315 . It is understood that a vacuum shunt valve  301  can have 2, 3, or more bosses  307 , each of whcih has an opening into the central part of the vacuum shunt valve  301  of a given size and shape. Bosses which are not utilized can simply be plugged off. Also, it may be preferable to limit the turning of the vacuum shunt valve  301  when installed for use with the system  21  in order to use the position of the handle  311  as an analog visual indicator for the level of operation of the vacuum shunt valve  301 . 
     Referring to FIG. 13, a side sectional view taken along line  13 — 13  of FIG. 12 indicates the operation of the vacuum shunt valve  301 . The valve main body  303  opening  313  in the bottom of vacuum shunt valve  301  is situated such that vacuum pressure can enter an aligned open end of a cylindrical valve element  317  before drawing permitted air to flow through a threaded internal surface  309  of boss  307 . Note that the inside of cylindrical valve element  317  contains a series of miniature bores  319  which are shown as being roughly vertically centered in the threaded bore  309 . As will be seen, the miniature bores  319  are distributed about the radius of the cylindrical valve element  317  and extend through the walls thereof. At the innermost end of bore  309 , the bore  309  presents a window opening  321 , exposing an area of the external surface of the cylindrical valve element  317  to the bore  309 . This area of the bore  309  is emphasized as a window opening  321  because it is the view window of the external surface of the cylindrical valve element  317  which is important rather than the overall diameter of the boss  308  since the window opening  321  may be large, leading to a smaller diameter bore  309 , or the window opening  321  may be small leading to a larger diameter bore  309 . Further, there may be other sealing structures within the bore  309  which define a smaller or larger window, or which may define a different shaped window opening  321 . It is the size and the shape of the window opening  321  which will determine which one or ones of the miniature bores  319  will be in the window opening  321  and therefore open to pass air flow within the bore  309 , thereby shunting air into the applied vacuum in a linear manner. 
     In addition to considering window opening  321  as a static principle, add the motion of the cylindrical valve element  317  and the placement of the miniature bores  317  to create an ever changing multiple combination or “mix” of number and size of miniature bores  317  which pass across the window opening  321 . As one of the miniature bores  317  approachs the edge of the window opening  321  it begins to move behind the edge of the window opening  321  and have its flow begin to be restricted. This may occur as another one of the miniature bores  317  approachs the opposite edge of the window opening  321  from a closed state and begins to emerge from behind the edge of the window opening  321  and have its flow begin to be opened. 
     This differential flow orifice principle is utilized herein to achieve a controlled flow evenly across the range of flow to which the valve is to be subjected. Because fluid flow, such as air is very non-linear, a valve opening profile which is percentage proportional to the area available for flow simply will not yield the linearity needed, it is ineffective. Where a valve with significant capacity is used, linearizing the lower end of its operating range would normally require an expensive controller, with an extra fine angular discrimination. However, the inventive use of a series of exactly spaced miniature bores  319 , and which are spaced to frame in and frame out of the window opening  321  as the valve handle  311  is turned will yield a linearization of valve flow, and which is proportional to the angular displacement of the valve handle  311  and stem  315 . This enables the physical position of the valve handle  311  to be used as an analog flow indicator and the housing of the system  21  or any improvements thereof may bear an indication of flow, against which the position of the valve handle  311  can be compared. This enables the operator to have better absolute and reproducable control over the flow, and to verify the flow through visually checking the position of the valve handle  311 . This advance in the valve art is particularly significant for the linearization of the lowest portion of the flow spectrum. Although not shown in FIG. 13, it is prefaerable that the vacuum shunt valve  301  be provided with a stop to insure that the displacement can occur over a 180° range only, although since the flow is from the port  309  of the valve through the valve main body  303  exiting bottom opening  313 , and since only one boss  307  is used as an inlet, the extent of the radial distribution of the miniature bores  319  across the face of the cylindrical valve element  317  could be made to exceed 180°. For example, in an extreme case, and where the window opening  321  occupied 20° of the area of the cylindrical valve element  317 , a series of miniatures bores  319  could be distributed over the remaing 340° of the cylindrical valve element  317 . The limitation of the vacuum shunt valve  301  to 180° is to make certain that the readings for the operator&#39;s use are always above the valve handle  311  so that the operator will not have to stoop or bend down to read indicator marks under the handle  311 . 
     Referring to FIG. 14, a linear illustration of the placement of the miniature bores  319  on the cylindrical valve element  317  is illustrated. The parameters of this drawing are by way of example only and depend heavily upon the geometry of the cylindrical valve element  317 , including its diameter, height, and the area of the window opening  321 . In this case, the window opening  321  is based upon a 0.355 inch diameter internal diameter against the cylindrical valve element  317  to form a saddle window. The cylindrical valve element  317  is about 0.75 inches in diameter. As can be seen, a large diameter valve element  317  with a small diameter window opening  321  would create the possibility for many more individual combinations of miniature bores  319  in the window opening  321 . 
     Given that the vacuum shunt valve  301  is desired to provide operablility over 180° of its range, it can be seen that the miniature bores  319  roughly occupy a little less than half of the linear length of a linear representation of cylindrical valve element  317 , which is numbered as  325 . The overall length of the linear representation  325  is shown as γ the roughly 180° operating range of the linear representation  325  is indicated with the symbol ν. The miniature bores  319  are fairly equally spaced at about 15° each, with there being from one to three of the miniature bores  319  being in the window opening  321  at any given time. The miniature bores sequentially occur across the linear representation  325  and have a diameter of 0.016, 0.016, 0.016, 0.026, 0.026, 0.026, 0.035, 0.035, 0.035, 0.040, 0.040, 0.040, and 0.045, inches in diameter. The center to center spacing of the first and last miniature bores  319  is shown as being η, and the hole spacing of about φ° which, given the dimensions of the window opening  321  and diameter of the cylindrical valve element  317 , is expected to be about 15° apart. 
     From a position of fully closed, the window opening  321  would first begin to partially open the first 0.016 inch miniature bore  319  and then fully open the first 0.016 inch miniature bore  319 . As the cylindrical valve element  317  continues to turn, the second 0.016 inch miniature bore  319  comes into view of the window opening  321  adding more air flow (more shunt). Finally, the third 0.016 inch miniature bore  319  comes into view of the window opening  321  adding still more flow. Next, as the first 0.016 inch miniature bore  319  begins to move out of view or presence within the window opening  321 , it is replaced by a first 0.026 inch miniature bore  319 . The last 0.016 inch miniature bore  319  is thus “exchanged” for the first 0.026 inch miniature bore  319  to thus slightly and linearly add more flow. As the cylindrical valve element  317  continues to turn, the second 0.026 inch miniature bore  319  comes into view of the window opening  321  as the second 0.016 inch bore leaves the window opening  321 , to thus slightly and linarly add more flow through the vacuum shunt valve  301 . Finally, the third 0.016 inch miniature bore  319  comes into view of the window opening  321  as the third 0.016 inch bore leaves the window opening  321 , again slightly and linarly add more flow through the vacuum shunt valve  301 . 
     Next, the first 0.026 inch miniature bore  319  begins to move out of view or presence within the window opening  321 , it is replaced by a first 0.035 inch miniature bore  391  and the process is repeated. At the end, a 0.045 inch bore is added as a 0.040 inch miniature bore  319  is eliminated. 
     For optimum smoothness, any two miniature bores which are being “exchanged” should have their respective beginng exits and entry into the window opening  321  occur simultaneously. Otherwise, there would be an undesired fall in flow immediately following a rise in flow, and linearity would be compromised. 
     Further, it is discovered that the valve  301 , and similar valves having a cylindrical valve element hereinafter described, have a direct scalability to higher volume flow. Doubling the dimensions of the valve  301  doubles its flow ability and capacity. As such, the dimensions given above coule be applied to different sized valves  301  to enable the systems described in the embodiments of the invention to be scaled according to size, with no experimentation needed. 
     FIG. 15 is a sectional view of the vacuum shunt valve  301  taken along line  15 — 15  of FIG.  13  and which illustrates the position of the miniature bores  319  when the valve is in the closed position. FIG. 16 illustrates initial movement of the cylindrical valve element  317  bringint the first three 0.016 inch diameter miniature bores  319  into view of the window opening  321 . 
     Referring to FIG. 17, a simplified perspective view of a positive feed diversion air valve  331  is seen, as one possible configuration of valve to be used for replacement of the foot pedal control  51 , or in some instances used in conjunction with any sort of hand tool or any sort of foot control boost, in providing air boost to the system  21 , and which will be more advantageously described and utilized in a further embodiment of the system of the present invention, below. It is introduced as a possible replacement for the foot pedal control  51  to illustrate its use in the system  21  thus far described with respect to FIG.  6 . Positive feed diversion air valve  331  has a main body  333  and has a pair of side bosses  335  and  337  each of which has an open bore  338  and which may be threaded. The bosses are located 180° apart so that supply air may be split in two directions. A handle  341  is provided as a generally linear knob extending in both directions away from a center pivot. Valve body  333  has an underside opening  343  indicated by an arrow, and the handle  341  is connected to the internals of the positive feed diversion air valve  331  by a valve stem  345 . Again, it is understood that a positive feed diversion air valve  331  can have 2, 3, or more bosses  337 , each of which has an opening into the central part of the positive feed diversion air valve  331  of a given size and shape and that two oppositely oriented bosses  335  and  337  are ideally required to utilize the two way diversion about to be described. Bosses numbering more than two, which are not utilized can simply be plugged off. Also, it is still preferable to limit the turning of the positive feed diversion air valve  331  when installed for use with the system  21  in order to use the position of the handle  341  as an analog visual indicator for the level of operation of the positive feed diversion air valve  331 . 
     Referring to FIG. 18, a side sectional view taken along line  18 — 18  of FIG. 17 indicates the operation of the positive feed diversion air valve  331 . The valve main body  333  opening  343  in the bottom of positive feed diversion air valve  331  is the intake opening and situated such that air flow can enter an aligned open end of a cylindrical valve element  347  before being permitted to flow through the bosses  335  or  337 . Note that the inside of cylindrical valve element  347  contains a series of small bores  349  which are shown as being roughly vertically centered in the threaded bores  338  and  339 . As will be seen, the small bores  349  are distributed about the radius of the cylindrical valve element  347  and extend through the walls thereof, but do not follow a sequential increasing pattern as was seen for vacuum shunt vacuum shunt valve  301 . At the innermost end of bosss  337  and  335 , bores  338  and  339  present a window openings  351 , and  353 , respectively. Window openings  351  and  353  expose opposite sides of the cylindrical valve element  347  to flow through respective bosses  337  and  335 . In this case, the cylindrical valve element  347  will be used throughout virtually all of its peripheral extent. Again, window openings  351  and  353  are used because it is the view window of the external surface of the cylindrical valve element  347  which is important rather than the overall diameter of the bosses  337  and  335 . 
     However, the linearity achieved in positive feed diversion air valve  331  is not from a position of no flow through the valve to maximum flow, but of 0% diversion to boss  335  and 100% diversion to boss  337  at one end of the operating range and transitioning to a 0% diversion to boss  337  and 100% diversion to boss  335  at the other end of the operating range. Between these two conditions, a linear transition must be made which will preferably not restrict air flow through the positive feed diversion air valve  331 . Also, mid-way Between these two conditions, flow is expected to be equally divided between the bosses  337  and  335 . 
     As has been discussed with respect to foot pedal control  51 , it is desireable to enable the compression side of the vacuum pump/compressor  141  to have a free flowing condition until the air pressure is needed for boost. Blocking the air supply impedes the use of engine power of the vacuum pump/compressor  141  to exert vacuum. So, much as the foot pedal control  51  invoked a normal condition free venting interrupted by blocking of the venting and pressured power boost from the pressure due to blocking the venting, the same can be done with a valve, in this case positive feed diversion air valve  331 . 
     The cylindrical valve element  347  uses almost the total periphery of its surfaces, but an examination of the layout of the small bores  349  in FIG. 19 shows that they do not follow an even stepped value, even over only a 180° length of a linear representation  355 . Again, the motion of the cylindrical valve element  347  and the placement of the small bores  347  to create an ever changing multiple combination or “mix” of number and size of small bores  347  which pass across the window openings  351  and  353 . Since the end point of the operating continuum will start at 100% flow into one of the bosses  335  and  337  and 0% flow in the other, a first one of the small bores  347  approachs the edge of the window opening  353  (assuming it to be the non flowing side) as the largest one of the small bores  347  begins to move behind the edge of the window opening  351  and have its flow begin to be restricted. 
     Again, because fluid flow, such as air is very non-linear, a valve opening profile which is percentage proportional to the area available for flow simply will not yield the linearity needed, it is ineffective. Further, since the flow is through two openings, which are oppositely oriented, the geometry of interest involves not only which small bores enter and leave one of the window opening  353  and  351 , but also the other one of the window openings  353  and  361  simultaneously. However, since the object is a smooth transition of flow from one side to the other it should be kept in mind that a change in flow area, even on one side alone, affects the percentage split between the two bosses  337  and  335 . 
     The inventive use of a series of well spaced small bores  349 , and which are spaced to frame in and frame out of the window openings  351  and  353  as the valve handle  341  is turned will yield a linearization of the relative flows between the bosses  335  and  337 , and which is proportional to the angular displacement of the valve handle  341  and stem  345 . This enables the physical position of the valve handle  341  to be used as an analog flow indicator to exactly control the magnitude of the air boost. 
     This enables the operator to have better absolute and reproducable control over the flow of boost air, and to verify the magnitude of the boost through visually checking the position of the valve handle  341 . This advance in the valve art is particularly significant for the linearization of needed air, but without blocking the air flow. As with vacuum shunt valve  301 , positive feed diversion air valve  331  is provided with a stop to insure that the displacement can occur over a 180° range only, but in this case, since almost 360° of the cylindrical valve element  347  is utilized, the 180° range limitation is functionally necessary. This is best seen in FIG. 19, which illustrates a linear illustration of the placement of the small bores  349  on the cylindrical valve element  347 , and is referred to as linear illustration  355 . The parameters of this drawing are by way of example only and again depend heavily upon the geometry of the cylindrical valve element  347 , including its diameter, height, and the area of the window openings  351  and  353 . In this case, the window opening  351  and  351  are again based upon a 0.355 inch diameter internal diameter against the cylindrical valve element  347  to each form a saddle window. The cylindrical valve element  347  is about 0.75 inches in diameter. 
     It can be seen that the small bores  349  roughly occupy the overall length of the linear representation  355  which is shown as γ, which also corresponds roughly to the 360° operating range of the linear representation  355 . The small bores  349  are fairly equally spaced at about 45° each, with there being two of the small bores  349  appearing in each of the window openings  351 ,  353  at any given time. The miniature bores sequentially occur across the linear representation  355  and have sequential diameters of 0.080, 0.280, 0.120, 0.280, 0.120, 0.280, &amp; 0.080 inches in diameter. The center to center spacing of the first and last small bores  349  is shown as being η, with hole spacing of about 45°. There are seven small bores  349 , but there is no small bore  349  at the 0° location. 
     Using an object of a length of the 180° length of the linear representation  355  and considering one end as representative of one of the window openings  351  and the other end representative of the other of the window openings  353 , sliding such object across the linear representation  355  will give an idea of the pairs of small bores  349  which appear simultaneously in their respective window openings  351  and  353 . Beginning at the left, and assuming that 0° is associated with the window opening  351 , the window opening  351  has no available small bore  349 , while the largest window opening  353  at 180° is associated with the window opening  353 . Moving to the right, window opening  351  becomes associated with 0.080 inch small bore  349  as window opening  351  becomes dis-associated with the 0.280 inch diameter small bore  349  and becomes associated with the 0.120 inch diameter small bore  349 . As the window opening  351  becomes dis-associated with the 0.080 inch small bore  349  and associated with 0.280 inch small bore  349 , the window opening  351  becomes dis-associated with the 0.120 inch small bore  349  and associated with the 0.280 inch diameter small bore  349  at the 180° mark, and so on. 
     At the end of the angular travel of the cylindrical valve element  347 , the flow through the window opening  351  becomes fully open while flow through the window opening  353  becomes fully closed. 
     FIG. 20 is a sectional view of the positive feed diversion air valve  331  taken along line  20 — 20  of FIG.  18  and which illustrates the position of the small bores  349  when the valve is in a position to pass 100% of the flow through boss  335 . FIG. 21 illustrates initial movement of the cylindrical valve element  347  beginning the shift of air flow into boss  337 , and which in accord with the angle of the valve handle  341  is expected to be about 75% through boss  335  and 25% through boss  337 . 
     The system  501  initially shown in FIG. 22 is especially needed where use is to be accomplished by technical personnel doing the same types of abrading jobs, and where management of the system is to be foolproof, where no amount of reasonable tampering will violate the protocol to use fresh supply media only and to isolate the waste media as much as possible. 
     System  501  is a Direct Linear Vacuum/Air Control System utilizing two custom developed valves, one for air pressure and one for vacuum control (these valves are patent applied for in this package). These valves provide a positive linear control from “no air/vacuum”, a setting of one (1) on the control knob, to “maximum air/vacuum”, a setting of five (5) on the control knob, with a full 180 degree movement from minimum to maximum of the control knob providing smooth positive and linear flow control. 
     Referring to FIG. 22, and generally speaking, a system  501  utilizes a custom vacuum operated, electric actuated, air flow control valve to block all air boost operations at vacuum levels under 10 inches of mercury. This three way soleniod operated valve will not actuate until the handset tool  75  has the opening  103  occluded (closed) by material to be abraded and a vacuum of over 10 inches of mercury developed at the vacuum gating valve. If the vacuum is not developed the air boost system will not operate under any conditions. If the system is in use and the handset is occluded and vacuum is over 10 inches of mercury and air boost is on and the operator removes the handset tool  75  from the material being abraded, vacuum is immediately lost, the air boost system closes by the soleniod and no media escapes through the handset tool  75  opening  103  because all media flow is inhibited. 
     System  501  utilizes an advanced design in the supply of abrasive media and the collection and control of waste media and abraded material described in FIGS. 7-11. Disposable supply media and waste cannisters are provided in matched pairs and both caintainers are replaced simultaneously. The supply system design allows for supply media to be provided in sealed media containers and installed onto the system by the operator by a 180 degree rotation lock. The waste media container is a self contained unit with a 360 degree lock, backflow stop (waste goes in but cannot get back out), a filter system and a outside metal jacket. Disposal of the empty media container and the full waste cannister is controlled by the owner/operator. 
     The system  501  of FIG. 22, is especially useful in the cosmetology and medical field is shown as system  501  and is oriented similarly to the system  21  of FIG. 6. A housing  503  will be of adequate size to support the components therein, and at least two housing embodiments will be shown. Electrical power is provided to the system  501  with a regular wall outlet  505 . An on/off switch  507  controls power availability into the housing  503 , A vacuum/compressor  511  is seen. Vacuum/compressor  511  has a one way air flow action which sucks into at least one port  513  and produces a pressurized output through at least one port  515 . Each half stroke of the piston produces a vacuum at port  143 , while the next half stroke of the piston within the vacuum/compressor  511  produces a pressurized output at port  515 . 
     The vacuum side of the system  501  includes port  513 , line  517  connected to vacuum guage  519  through a restrictive orifice  521 . A vacuum line  523  connects to a secondary filter  525 , typically mounted for visual inspection on the outside of the housing  503 , and which is connected through a connector tube  531  to waste canister  533  which holds primary filter  233  seen in FIG.  8 . Waste canister  533  is preferably as seen in FIGS. 7-9. From waste canister  533 , and after providing flow through filter  233 , the flow continues through a line  535  which extends to a fitting  537  which may be color coded black to help prevent unintended reversal of the hoses  77  and  79  seen in the earlier Figures. A “T” shaped fitting leads to a linear vacuum control valve  539  which can shunt atmospheric air into the vacuum produced in the line  535 . Vacuum controlvalve  539  can be of many different designs, but the design of vacuum shunt valve  301  of FIGS. 12-16 will preferably be used for the vacuum control valve  539 . Note that in this configuration, the shunt is introduced into the general vacuum sequence of lines and filters immediately before the port  537  on the way to the manual contact tool  75 . (In FIG. 6, the valve  149  shunted air virtually directly into the vacuum pump/compressor  141 , thereby using the waste canister as a vacuum buffer. 
     A “T” connection is used to enable a vacuum sensor switch K 1  to be put into fluid communication with the vacuum in the line  535  immediately before the port  537 . Once the vacuum in the line  535  is high enough, say above 10 inches of mercury, a relay scheme operates a shunt valve K 2  which makes air pressure available to the supply side of the system, from the port  515 . When the vacuum in the line  535  is below 10 inches of mercury, the pressure available to a solenoid valve K 2  from the port  515  is simply shunted to atmosphere within the housing  503 . Diversion of flow from the vacuum pump/compressor  511  is to both (1) prevent air from flowing through to begin ejecting abraisive material which would inadvertently be emitted, and (2) avoid loading the vacuum pump/air compressor  511  which would render the vacuum too low to be of any use, by throttling the system. 
     Continuing with the vacuum portion of the system  501 , a vacuum is presented to port  537  into the vacuum side of the manual contact tool  75 . If opening  103  of the cap  101  is occluded by pressing the manual contact tool  75  over the area to be abraded, the vacuum will be presented to port  541  to enable a mixture of abraisive material and air to be drawn through a line  543  from a supply canister  545 . System  501 , like the system  21 , can operate purely in vacuum mode, and pull ambient air from the surroundings of the housing  503  and then through the system  501 . However, during the pressure boost, the pressurized air was air from the vacuum pump/compressor which was previously drawn through the vacuum/compressor  511  as the exhaust of the vacuum system, with air coming into port  513 . Even though the waste canister  533 , primary filter  223  and secondary filter  525  are expected to completely, although mechanically, remove all abraisive material and abraded material from the vacuum inlet line  523 , the very remote possibility exists that extremely tiny amounts of contaminated material might be able to get through. The primary filter  223  and secondary filter  525  are expected to be about five micron size, but can be different sizes, for example, gradually smaller in filtration size, but correspondingly larger in surface area to prevent undue pressure drop. 
     One optional device, in order to make absolutely certain that no contaminated material passes through vacuum/compressor  511  to re-enter the system  501 , even through regular operation, filter failure or rupture and the like, an input line  547  into the supply canister  545  is made to first pass through the 0.7 micron filter  558  long before it reaches the ultraviolet purification system  549 . Typically the ultraviolet purification system  549  will provide an expanded area filter system illuminated by an ultraviolet light, and with sufficient flow residence time so that if a contaminated particle was introduced, it would be exposed to ultraviolet radiation that would kill it. 
     The input to the ultraviolet purification system  549  is fed by a line  551 , which may also optionally be connected through a heater  552  which may preferably be a ceramic heater. The heater is placed so that heat added to the air will work in conjunction with the ultraviolet purification system  549 , increasing its effectiveness by providing a higher temperature process stream for ultraviolet irradiation. In addition, any heat in the input line  547  will have an opportunity to be absorbed by the media in the supply canister  545 . Further, an additional heat exchanger can be added as a part of inlet line  547 , or as a part of line  543 . Preferably, either of the lines  547  or  543  will take a serpentine path along with perhaps both an attachment to a metal wall of housing  503  and heat fin on the lines  547  or  543  and possibliy on the outside of a wall of the housing  503 . 
     Line  552  is then connected through a “T” fitting  553  which is used for mounting a relief valve  554  to a control valve  555 , which is preferably subject to linear operation. To insure that only completely filtered air enters the system  501  through the relief valve  554 , a 0.07 micron air filter  556  is attached at the end of the relief valve  554  to insure that entering air is very well filtered. 
     Control valve  555  is preferably configured as positive feed diversion air valve  331  as seen in FIGS. 17-21, but can be any configuration. The valve  555  has one input connected to a line  557  which connects back to the port  515  through a filter  558 , which preferably has a filtration size of about 0.7 micron. The filter  558  limits the re-introduction into system  501  of any contaminated particles which may have made it through the filtration provided prior to the vacuum suction of the vacuum pump/compressor  511 . The valve  555  has a second port  559  which is an air dump, preferably fritted or filtered to disperse air going into or out of the valve  555 . 
     However, it is desired that control valve  555  operate between a condition of full air purge through the second port  559 , with the input air being diverted over to line  552  Again, if the control valve  555  is set to completely divert air 100% through the second port  559 , and closed to the line  552 , the relief valve  553  can open to admit air into the line  551  for vacuum level operation. 
     The valve  555  is arranged so that it can open air into the line  552  during vacuum operation and such that it can control the pressurized air supplied through line  557 , either by diverting through second port  559 , or by controlling the magnitude of air which is able to reach the line  551 . But before the linear air control valve  555  can operate on any inlet air, the shunt valve K 2  must be in an operational position to pressurize line  557  by being set not to divert air to the exhaust port of shunt valve K 2 . Operation of K 2  should preferably require a vacuum of 10 inches of mercury at the relay K 1 . 
     The system  501  can be constructed without the air boost capability by simply allowing port  515  of the vacuum pump/compressor  511  to simply vent to the surrounding atmosphere, and eliminating shunt valve K 2 , valve  555 , heater  552 , and ultraviolet purification system  549 . In addition, “T” mounted relief valve  553  would be placed in line  547  with filter  558  and optionally a muffler. The result will be a system which still has vacuum only operation, but which still has the supply and waste cannister configuration seen in FIGS. 7-11. 
     Referring to FIG. 23, a vacuum only system  601  is seen which is intended primarily for the cosmetology market. The vacuum only operation is believed to be more suitable for non-medical personnel. The system  601  has a main housing  603 , and a pair of oppositely located side supports  605  and  607 . Side support  605  supports a waste canister  611  while side support  607  supports a supply container  613 . 
     The main housing  603  includes a top plate  615  and angled front plate  617  which contain the operating components of the system  601 . Front plate  617  supports an ON/OFF rocker switch  619  which is used to turn the system  601  on and off, but only providing the lockout key is inserted into the lockout safety switch  621  and that the lockout safety switch  621  is closed. At the center of the front plate  617  is a vacuum pressure gauge  623 . To one side of the vacuum pressure guage  623  a valve handle  625  is surrounded by a series of numerical designations on the front plate  617  which give a visual indication of the displacement of the valve handle  625  for operation of an internal vacuum control valve, preferably vacuum shunt valve  301  of FIGS. 12-16. 
     Below the slanted flont plate  617  is a front vertical plate  627  which support pair of quick connect fittings  631  and  633  to which are connected hoses  47  and  49  seen in  77  and  79  seen in FIG.  1  and which lead to the manual contact tool  75 . Also seen is an electrical power cord  635 , and a cylindrical support  637  for supporting the manual contact tool  75  when it is not in use. 
     Referring to FIG. 24, a front view of the system  601  is seen. Referring to FIG. 25 a rear view shows a fuse  641 , and also a glass cover  643  for both operation of and visual inspection of the secondary filter  525  seen in FIG.  22 . The cover  643  is typically threadably removable to change the filter element contained inside. Both the supply canister  613  and the waste canister  611 , in accord with the teaching of FIGS. 7-11, are preferably threadably removable. 
     Referring to FIG. 26, a vacuum and boost system  701  is seen which is intended primarily for the medical market. The increased power from combined boost and vacuum operation is believed to be more suitable for well trained medical professionals. The system  701  has a main housing  703 , and an integrated top cover  705  and a front vertical panel  707 . A side  709  and front panel  707  are abbreviated due to a rectangular accommodation space  711  for accommodating the vertical support of a waste canister  713 . Within the accommodation space  711 , and just underneath waste canister  713 , a series of four optical indicators  714  are seen. These optical indicators  714  are optional and may be connected to any of a number of internal structures and systems for showing a fault. Preferably the optical indicators  714  each correspond to a separate bulb illuminating an ultraviolet system (seen in FIGS.  29 - 31 ). Ideally, and for long life and reliability the optical indicators  714  will be of the fiber optic type and will indicate an ultraviolet bulb fault directly, through transmission of light along the fiber optic cable. 
     Another accommodation space  715  accommodates the vertical support of a supply canister  717 . At the far side of the main housing  703  is a cylindrical support  719  for supporting the manual contact tool  75  when it is not in use. 
     Front vertical panel  707  the operating components of the system  701 . Front panel  707  supports an ON/OFF rocker switch  721  which is used to turn the system  701  on and off, but only providing the lockout key is inserted into the lockout safety switch  723  and that the lockout safety switch  723  is closed. At the center of the front plate  707  is a pressure gauge  725 . To one side and below of the pressure guage  725  a valve handle  727  is surrounded by a series of numerical designations on the front plate  717  which give a visual indication of the displacement of the valve handle  3155  for operation of an internal vacuum control valve, preferably vacuum shunt valve  301  of FIGS. 12-16. To the other side and below of the pressure guage  725  a valve handle  729  is surrounded by a series of numerical designations on the front plate  717  which give a visual indication of the displacement of the valve handle  315  for operation of an internal pressure boost control valve, preferably valve  351  of FIGS. 17-21. 
     Also supported by the panel  707  is a pair of quick connect fittings  731  and  733  to which are connected hoses  47  and  49  seen in  77  and  79  seen in FIG.  1  and which lead to the manual contact tool  75 . Also seen is an electrical power cord  735 . 
     Referring to FIG. 27, a front view of the system  701  is seen, and indicating a side wall  737 . Referring to FIG. 28 a rear view shows a fuse  741 , and also a glass cover  743  extending out of the side of the system  701  for both operation of and visual inspection of the secondary filter  525  seen in FIG.  22 . The cover  743  is typically threadably removable to change the filter element contained inside. Both the supply canister  713  and the waste canister  717 , in accord with the teaching of FIGS. 7-11, are preferably threadably removable. Also seen is a ventilation opening  745 . 
     The system  501 , both with and without embodiment into the physical realization of the systems  601  and  701 , and which will be discussed collectively as systems  501 ,  601  and  701  gives a number of advantages in addition to the advantages had with the system  21 . The systems  501 ,  601  and  701  eliminates the operator handling of used media with a sealed self contained disposable waste container  213 , as seen in FIGS. 7-9. Systems  501 ,  601  and  701  facilitate the utilization of the new linear vacuum vacuum shunt valve  301  of FIGS. 12-16 and air boost valves  331  of FIGS. 17-21 to give the operator a much finer range of adjustment of the abrasion effectiveness and comfort to the patient. In addition, on start up of the systems  501 ,  601  and  701 , the visual relationship between the position of the valves  301  and  331  enable the operator to preset the machinery before use, and eliminate the “hunt” for the proper operating conditions by trial and error, and at patient expense. 
     The supply of new media is bottled in its own container that is now multiply sealable before shipment and receipt by the user. Many seal structures can be employed to insure integrity and purity of the supplied abraisive product. The supply can then remain sealed until it is uncapped to screw onto a support structure of a machine embodying the systems  501 ,  601  and  701 . 
     The capacity of the supply canister  267  and waste collection canister  213  of FIGS. 7-11 cut the time lost for having an operator handle the abraisive material, such as for emptying and refilling the machine of systems  501 ,  601  and  701 , by at least 90%. The vacuum safety switch and solenoid valve shown in FIG. 22 as vacuum sensor switch K 1 /solenoid valve K 2  that sets a vacuum pre-condition for control of the the air boost, eliminates the possibility of inadvertently blowing abraisive media when the manual contact tool  75  is in not in position and when at least ten inches of mercury vacuum is not present at the end of the manual contact tool  75 . 
     The use of vacuum sensor switch K 1 /solenoid valve K 2  as a shunt valve configuration, acts as one possible mechanism for elimination of foot pedal control  51  for a freer mode of operation, or if it is desired, a greater degree of control of the abrasive media can be hand if the optional foot pedal control  51  of FIG. 6 is used. As the operator takes a break from manipulation of the manual contact tool  75  by breaking contact of the opening  103  from the skin surface, the shunt valve K 2  automatically diverts the air supply before the air boost can even reach the linear air control valve  555 . This frees the operators to only concern themselves with the manual contact tool  75 , and its relationship with the area to be abraded. Elimination of a foot control  51  also frees the operators to move around and situate themselves with regard to the work area. If a foot pedal control  51  is desired, it can be provided, especially if the operator is in surroundings where the operator will be constantly positioned, or where even greater control is required, although it is expected that this will more likely occur during non-medical utilization of system  21  or the like. 
     The disposable cap  101  on the manual contact tool  75  that is replaced for each patient insures sanitary conditions of the treatment. The manual contact tool  75  is easier to hold and is balanced for optimum comfort of the operator. The provision of a large vacuum gauge is easier for the operator to see in order to make accurate adjustments. 
     Referring to FIG. 29, one embodiment of the ultraviolet purification system  549  is seen. A view looking downward on the ultraviolet purification system  549  illustrates a housing  751  which is rectangular in shape and having a series of three internal baffles  753 ,  755 , &amp;  757 . One wall  759  has an inlet aperture  761  spaced apart from an exit aperture  763 . Baffles  753  and  757  have apertures  765  and  767  nearer an end wall  769 . Baffle  755  has a set of apertures  771  nearer the wall  759 . As can be seen, the baffles  753 ,  755 , &amp;  757  in combination with the apertures  765 ,  767  and  771  and the inlet aperture  761  and exit aperture  763  create a serpentine flow space for air entering the ultraviolet purification system  549 . 
     Removable wall  769  supports a series of identical electrical sockets  775 . An ultraviolet light  777  is shown in one of the sockets  775  and is seen to occupy the bulk of the length of the ultraviolet purification system  549 . The purpose of the structure of the ultraviolet purification system  549  is to give air flowing therethrough adequate exposure to the lights  777  and contact with the ultraviolet electromagnetic light rays from the ultraviolet lights  777 . The dimensions of the ultraviolet purification system  549  housing is preferably about eight inches by eight inches by six inches, with the eight inch dimensions shown in FIG.  29 . The bulbs may have a wattage rating of from about 16 to about 20 watts of power. 
     Referring to FIG. 30, a side view of a bulb  777  has a curved fluorescent type tube  779  and is supported by a base  781 . The base  781  has a pair of electrical prongs  783  for insertion into mating plugs in the electrical sockets  775 . Changing of the bulbs  777  merely involves opening the eight inch by six inch wall on the ultraviolet purification system  549 , and unplugging burned out bulbs  777  and replacing with new bulbs  777 . Also as seen in FIG. 29 is a seal  791  and a set of screws or bolts  793  which hold the removable wall  769  in place. At the left side of the purification system  549  a series of fiber optic sensors  794  are seen, each having a fiber optic cable  795  extending away from purification system  549 . The fiber optic cables  795  send light back to the four optical indicators  714  seen in FIGS. 26 and 27. The structures of the purification system  549  are shown with an upper wall removed for clarity. 
     Referring to FIG. 31, and also as seen in FIG. 29 is a seal  791  and a set of screws or bolts  793  which hold the end wall  769  in place. The side sectional view in FIG. 31, seen with the top wall  796  in place, better illustrates the attachment of the removable wall  769 . The apertures  765  are seen for creating the serpentine air flow pattern. FIG. 31 is a sectional view taken along line  31 — 31 , of the ultraviolet purification system  549  which is expected to be made of silver anodized metal for maximum reflectivity of the germicidal ultraviolet wavelength emissions of the ultraviolet light  777  within the system  549 . Also seen in FIG. 31 is a bottom wall  797 . It is understood that the ultraviolet purification system  549  can be built in any dimension, the only requirement is that an adequate number of bulbs  777  and of adequate power rating are used along with a ultraviolet purification system  549  of sufficient size that the air flow has sufficient residence time for adequate irradiation. 
     Generally, the external system  705  corresponds to the system  501  in FIG. 22, but since so many variations on the system  501  are possible, and within the physical realization of FIGS. 26-28 it is essentially a physical realization system  701  and may have a wide variety of structures, which have a relationship similar to that shown in FIG.  22 . Similarly, the external system  601  corresponds to the system having less than the full capability of system  501  of FIG. 22, but again having the possibility of a large number of variations. Since the system  501  shows a large number of the components which are possible, and which would be accommodated by the system  701  of FIGS. 26-28, a vacuum only schematic system will be shown which would be accommodated by the system  601 . 
     Referring to FIG. 32, a schematic view of a vacuum only system  801  is shown. System  801  also utilizes the advanced design in the supply of abrasive media and the collection and control of waste media and abraded material described in FIGS. 7-11. The system  801  of FIG. 32, is especially useful in the cosmetology and medical field is shown. A housing  803  will be of adequate size to support the components therein, and the housing of system  701  is preferred. Electrical power is provided to the system  801  with a regular wall outlet  805 . An on/off switch  807  controls power availability into the housing  803 . However, a diffuser  809  is seen in a vacuum/compressor  811  to make sure that air which is ejected as a result of the vacuum operation escapes freely into the surrounding area. As explained, to allow pressure to build in the pressure side of the vacuum/compressor  811  robs it of the power which is otherwise used to create vacuum. The vacuum side of the vacuum/compressor  811  has a one way air flow action which sucks into at least one port  813 , into a line  817  connected to vacuum gauge  819  through a restrictive orifice  821 . A vacuum line  823  connects to a secondary filter  825 , typically mounted for visual inspection on the outside of the housing  803  with a clear housing  827 . The secondary filter  825  is connected through a connector tube  831  to waste canister  833  which holds a primary filter  233  seen in FIG.  8 . From waste canister  833 , after providing flow through filter  233 , the flow continues through a line  835  which extends to a fitting  837  for connection to the manual contact tool  75 . A “T” shaped fitting leads to a linear vacuum control valve  839  which can shunt atmospheric air into the vacuum produced in the line  835 , and may have an inlet filter-difusser  840 . Again, vacuum control valve  839  is preferably the vacuum shunt valve  301  of FIGS. 12-16. 
     The other connection to the manual contact tool  75  is through a fitting  841 , which then communicates through a line  843  from a supply canister  845 . Supply canister  845  has a filter-diffuser fitting  847  to draw clean surrounding air into the supply canister  845  where it is used to fluidize and draw a supply of air and abrasive material toward the fitting  841 . Since the inlet air is clean air, ultraviolet treatment and heat treatment is not expected to be needed and filter-diffuser fitting  847  can have a small particulate filtering size, and at least as small as inlet filter-difusser  840 . The inlet filter-diffusers  840  is meant to prevent particulates from entering the supply canister  845 , and whether it is considered to be a diffuser or filter will depend upon the size of particulates which it admits. 
     While the present invention has been described in terms of an abrasion system and hand-held instrumentation therefor, one skilled in the art will realize that the structure and techniques of the present invention can be applied to many appliances including any appliance where a vacuum or vacuum and pressure boost system are used to impact abrasive material against a surface to be abraded and especially where a sterile operating system is needed. 
     Although the invention has been derived with reference to particular illustrative embodiments thereof, many changes and modifications of the invention may become apparent to those skilled in the art without departing from the spirit and scope of the invention. Therefore, included within the patent warranted hereon are all such changes and modifications as may reasonably and properly be included within the scope of this contribution to the art.