baber/WOPTO huggingface dataset:
Patent GB-1500458-A (GB)
Title: Dual pressure valve for use in ventricular shunt system
IPC: A61M27/00
Filed: 1976-06-17
Abstract: 1500458 Ventricular shunt CORDIS CORP 17 June 1976 [30 June 1975] 25059/76 Heading A5R A ventricular shunt for use in the treatment of hydrocephalus comprises a catheter 10 for insertion into a ventricular 12 of the brain, a valve assembly 20 and an implantable drainage catheter 21, said valve assembly, Fig. 2, comprising a housing 22 made of an elastomeric radiopaque material and having mounted therein a fixed one-way valve 24 and a movable one-way valve 26, said valve 26 being movable between an on-line position 28 in which the valves 24, 26 are in series and an off-line position 30 in which the valve 26 is by-passed by fluid passing through the valve assembly. Each valve includes a spring-biased ball (46) Fig. 5 (not shown), the pressure in the spring (44) being adjustable by movement of a threaded insert (38) the fixed valve 24 is adjusted to a threshold operating pressure appropriate for maintaining a relatively low cerebro-spinal fluid (CSF) pressure in the ventricles and the movable valve 26 is adjusted to a higher pressure so that the total threshold operating pressure of the valve assembly when the valves are in series is equivalent to or higher than a normal CSF pressure. Suitable threshold operating pressures are 30 - 40mm H 2 O for the fixed valve 24 and 100 - 120mm H 2 O for the movable valve 26. In the treatment of normal pressure hydrocephalus in which the ventricles have become enlarged, a reduced CSF pressure is established by using the valve assembly in the off-line position so that valve 26 is by-passed; the reduction of pressure induces shrinkage of the ventricles and when these have reached their normal size the valve 26 is moved into position to re-establish a normal CSF pressure.
Patent GB-1305977-A (GB)
IPC: F16F9/48
Filed: 1970-05-26
Abstract: 1305977 Automatically adjustable shock absorbers J R SINGER 26 May 1970 [27 May 1969] 25066/70 Heading F2S The position of a member co-operating with a plurality of spaced ports in the working cylinder of a piston-cylinder shock absorber varies automatically in response to the pressure in the cylinder, against the bias of a spring. In Fig. 1, an intermediate tube 70, concentric with the working cylinder 32 and having ports 94, is movable axially against the bias of springs 71, in response to the pressure in the chamber 56 in front of the piston 42 acting on a cup 74, to vary the effective flow area of the spaced ports 92 in the working cylinder 32. In Figs. 2 and 3 (not shown) it is the working cylinder (114, 150) which moves against the spring bias in response to pressure, the intermediate tube (110, 148). In Fig. 4 (not shown) the splined intermediate tube (190) is rotated by longitudinal movement of a pin 200 (Fig. 5) in response to the pressure in the working chamber (210) against the bias of a spring 204. In the embodiment of Figs. 6-8 (not shown) the member cooperating with the ports (318) in the working cylinder (314) is an auxiliary tube (316) with ports (320), the tube (316) and working cylinder (314) being side-by-side. The auxiliary tube (316) automatically rotates (by means of splines and a pressure and spring responsive pin 326) to vary the damping. In the embodiment of Figs. 11-12 (not shown) the auxiliary tube (382) and working cylinder (372) are again sideby-side, but the auxiliary tube (382) is movable axially. In Fig. 9, a wedge 350 is movable axially against the bias of springs 354, in response to the pressure in the chamber 344 in front of the piston 339 acting on a plunger 356, to vary the effective flow area of the spaced ports 348 in the working cylinder 338.
Patent GB-188468-A (GB)
Title: Improvements in picture hooks
IPC: A47G1/22
Filed: 1921-09-22
Abstract: 188,468. Taylor, E. E. Sept. 22, 1921. Hooks fixed to walls and flat surfaces. - A picture hook is made from a short metal blank 1 by pressing out spikes 2 in one direction for fixing the hook, and pressing out a hook member 3 in the opposite direction leaving an enclosed slot in the blank. The spikes 2 are located above and below the hook member which may be encased by a piece of rubber tubing.
Patent GB-1185642-A (GB)
Title: Improvements in or relating to Door Latches
Inventor: JAMES MICHAEL JOSEPH
IPC: E05C1/16
Filed: 1966-03-14
Abstract: 1,185,642. Door latches. MICRO & PRECISION MOULDINGS (CHELTENHAM) Ltd. 9 March, 1967 [14 March, 1966], No. 25094/68. Divided out of 1185641. Heading E2A. The subject matter of this Specification is identical with that of Specification 1185641 but the claims relate to the provision of an auxiliary return spring mounted within the housing on the inner side of the actuating member and operative to apply a return force to that member without increasing the spring return force on the latch bolt.
Patent GB-532495-A (GB)
Title: Improvements relating to pneumatically operated die-casting machines
IPC: B22D17/26
Filed: 1939-09-01
Abstract: 532,495. Die-casting machines. E. M. B. CO., Ltd., CATLIN, L. A., and COCKERILL, W. H. Sept. 1, 1939, No. 25097. [Class 87 (ii)] [Also in Group XXII] A machine for die-casting aluminium &c. having its die-head a pneumatically operated under manual control by a piston b is provided with a hydraulic device for arresting the head at any desired positions. Air is admitted to and exhausted from opposite ends of the cylinder c, in which the piston b moves, by valve i operated by cams m on a shaft n and a handle p. The piston b is connected by a rod d and head f to a toggle device g which operates the die-head and by a rod s to a piston t in a cylinder u which contains oil and is connected, through valves x, closed by springs 2, to a reservoir w. These valves are opened by a cam 7 and linkwork 10 to allow the die head to be moved when the handle p is in the position p<SP>2</SP> or p<SP>4</SP>. When the handle p is moved into position p' or p<SP>2</SP> the valves i are operated to urge the piston b to the left but movement cannot occur until it is moved into position p<SP>2</SP>. The die-head, in moving to the left, carries rods 17 and a stop 15 in the same direction until it engages a tail 12 of the handle p and moves this into position p<SP>1</SP> to arrest the movement of the die-head. The movement can however be continued by pulling the handle p forward about its pivot 14, Fig. 2, against the action of a spring, not shown, thus freeing the tail 12 from the stop 15, and returning it to position p<SP>2</SP>. The same action occurs on the return stroke for which the handle is moved by hand into position p<SP>4</SP> and returned automatically by a stop 16 and tail 13 to position p<SP>3</SP>. When aluminium or other metal is injected into the die by compressed air the valve for admitting the air may be actuated by a shaft 20, Figs. 1 and 3, having flats 23, 24 engaged by openings, each having a slot portion 25, 26 and a circular portion, in members 29, 30, the former being connected to a lever 11 on the shaft n and the latter being normally pressed to the right by a spring 34 to engage the flat 24 in its slot 26 and prevent the shaft 20 from being turned to admit the compressed air The flat 23 is engaged by the slot 25 in all positions of the handle p except p<SP>2</SP> and when the head f moves to the left a stop 32 thereon engages an adjustable arm 33 on the member 30 to move it into the position in which the shaft can be rotated. This rotation prevents the handle p from being returned to its normal position until the shaft is returned to its normal position to cut off the compressed air and place the flat 23 in position to enter the slot 25.
Patent GB-759434-A (GB)
Title: Improvements in or relating to two-coordinate electro-magnetic step-by-step switches
IPC: H01H67/16
Filed: 1954-08-30
Abstract: 759,434. Automatic exchange switches. GENERAL ELECTRIC CO., Ltd., and ROSE, W. R. Aug. 17, 1955 [Aug. 30, 1954], No. 25128/54. Class 40 (4). In a vertical and rotary switch in which a frame carrying the driving mechanism and switch shaft 4 has side plates 7, Fig. 1, forming hooks whereby the frame may be detachably mounted on an associated switch bank and cradle, a vertical contact bank 9 is mounted on the frame and an associated wiper assembly is mounted on the switch shaft 4. The electromechanical driving mechanism for the switch is mounted above a plate 2 and a stirrup with side legs 6 is mounted below the plate 2 to provide a bearing 5 to support one end of the shaft 4. The plates 7 are provided on the side legs 6. The vertical contact bank 9 is carried by a side leg 6 and the contacts extend radially towards the switch shaft 4, Fig. 2. The associated wiper assembly comprises wipers 12 rotatably mounted between two collars 14 on the switch shaft 4. Alternatively the assembly may be rigidly but adjustably mounted on an arcuate block which is rigidly clamped to webs 19 on the switch shaft. In this event one wiper contact 11 must be dispensed with so that the wiper may be disengaged from the vertical contact bank, or the contact bank and wiper contacts may be set tangentially to the circular arc traced by the wiper contacts as the switch shaft steps through rotary motion. Contacts 10 of the vertical contact bank 9 have solder tags 15, wires from which pass through an aperture 30 in the plate 2, Fig. 1, and are connected with a multiposition plug connector which engages with a corresponding socket when the frame is mounted on the associated switch bank and cradle. Specification 758,105 is referred to.
Patent GB-1352783-A (GB)
Title: Oil recovery and clean up system
IPC: E02B15/04
Filed: 1971-04-19
Abstract: 1352783 Removing floating oil from open water J H PARKER 19 April 1971 [23 March 1970] 25130/71 Heading B1D Oil to be removed from the open sea or from a confined dock is first enclosed where necessary by a floating boom (Fig. 10, not shown) after which at least one floating recovery unit (Fig. 2) is dropped into the confined oil layer and the oil plus some water are drawn from the unit into a separator (Fig. 8) which may stand on the land or on a ship. The recovery unit comprises circumferentially spaced conical floats 11, 12 (13) connected by a frame which includes a lower stabilising disc 28 and which supports a vertically adjustable open collection vessel 33 over whose upper lip the oil flows. A vertically adjustable draw off pipe 38 dips into vessel 33 and its other end is connected by flexible tubing to a suction pump which delivers the oil to the separator. If the oil is thin then only a little water is allowed to flow into vessel 33 over its lip, but Fig. 3 (not shown) illustrates a recovery unit in which water is drawn into vessel 33 through open-ended pipe 33a and mixes with a thick oil flowing over the lip to produce a mixture able to pass up pipe 38 and the tubing more readily. The unit may carry a peripheral wire mesh strainer 32, which might comprise only vertical strands in the thick oil version. The unit can be towed behind a boat, but as illustrated it has an elongated handle whose serrated lower edge enables the unit to be pivoted to the dock wall. The handle has a movable weight to assist balancing (Fig. 6, not shown). The separator (Fig. 8) is shown as a trailer and includes a compressor 61 which powers the pumps connected to the recovery units (Fig. 10). The pumps deliver into a settling chamber 67 from which a flexible overflow pipe 73, adjustably secured to the roof drains the floating oil into a storage tank 65. The water phase flows through gaps 85, 86 into second settling chamber 82 and thence into similar third chamber 87. A pair of vertical pipes 89, 90 connected at 91 enable water to overflow from chamber 87, whence valves 92 return it to the open water. Such oil as accumulates in chambers 82, 87 is periodically withdrawn through manholes 93. Pipe 89 acts as a vent. Chamber 67 has an indicator 76 which monitors the oilwater interface level. Before operation all three chambers are filled with water. Additional floating screens (5a) may protect the recovery unit (Fig. 10), and strainers may be included in tubing (50) to protect the pumps.
Patent GB-840729-A (GB)
Title: Improvements in or relating to processes for purifying silicon and/or germanium or alloys or compounds of silicon and/or germanium
IPC: C22B41/00
Filed: 1956-08-17
Abstract: Silicon and/or germanium, or an alloy or compound of silicon and/or germanium, is purified by mixing it with gaseous or liquid phase with silica nitride, and/or germanium nitride, and then separating it from said nitride.  The nitride may be formed in situ, for example by introducing nitrogen.  In one embodiment, silicon or germanium is prepared by thermal decomposition and/or reduction of a halide in the presence of nitrogen, and the nitride containing crystals of silicon or germanium obtained are treated with a halogen and/or a halogen acid, especially chlorine or hydrochloric acid, to form a volatile halide, thereby separating it from the nitride, which is not attacked.  In another embodiment the halide is mixed with nitrogen and maintained at a temperature above the vaporization point of the halide but below the decomposition temperature of the nitride formed. The substance to be purified may be melted and mixed with the nitride in a crucible, any auxiliary apparatus, e.g. stirrers, being made of, or coated with, the nitride.  In an example silicon is freed from copper by melting it, mixing it with silicon nitride and/or nitrogen, and then separating the molten silicon from the solid nitride residue, which retains the impurities.ALSO:Germanium, or an alloy thereof is purified by mixing it in the gaseous or liquid phase with silicon nitride and/or germanium nitride, and then separating the said germanium or alloy from the said nitride.  The nitride may be formed in situ, for example by introducing nitrogen.  In one embodiment germanium is prepared by thermal decomposition and/or reduction of a halide in the presence of nitrogen, and the nitride-containing crystals of germanium are treated with halogen and/or a halogen acid, especially hydrochloric acid or chlorine, to form the volatile halide, thereby separating it from the nitride, which is not attacked.  In another embodiment the halide is mixed with nitrogen and maintained at a temperature above the vaporization point of the halide but below the decomposition temperature of the nitride formed.  The substance to be purified may be melted and mixed with the nitride in a crucible, any auxiliary apparatus, e.g. stirrers, being made of, or coated with, the nitride.
Patent GB-745139-A (GB)
Title: Improvements in or relating to transmitting apparatus for signals recorded on tape
Inventor: BREWSTER ARTHUR EDWARD
IPC: H04L13/08
Filed: 1952-10-09
Abstract: 745,139. Telegraph transmitters. STANDARD TELEPHONES & CABLES, Ltd. Oct. 2, 1953 [Oct. 9, 1952], No. 25321/52. Class 40 (3). A transmitting apparatus for code signals having their elements recorded longitudinally on a tape comprises a sprocket wheel for feeding the tape-past a reading head for detecting the signal elements, means for transmitting the signals, and further means operating independently of said detected signals for arresting said sprocket wheel for a predetermined interval during the passage of a stop element under said head so that the time interval of the transmitted stop element may be increased to any desired length. In the recording apparatus, Fig. 1, the tape 42, preferably magnetic, is fed by a sprocket 41 on a shaft 40 carrying a wheel 1 having 24 teeth and rotated at speed such that during one revolution 24 seven-unit signals are recorded. In the rest position, a detent 2 on a pivoted bell crank 3, controlled by the armature 5 of the electromagnet 6, engages a tooth, such as 9. The start element rocks the lever 3 to release the wheel 1 so that signal elements are recorded on the tape, and the beginning of the stop element rocks the detent so that the wheel 1 is arrested at the end of 140 ms. assuming code elements of 20 ms. and a stop element of that duration. In the transmitting apparatus, Fig. 2, the tape 22 is fed to a reproducer head by a wheel 21 on a shaft 20 carrying a wheel 14 having 24 teeth and rotated as in the case of the wheel 1 of Fig. 1. In the stop condition of relay 16 the detent 15 on bell-crank 17 engaging a tooth such as 18 or 19 arrests the wheel 14. With the switch 8 in the stop position, the relay 16 energized by marking current from the battery B holds the detent in the arresting position. When the switch 8 is moved to the start position, marking current over contact M still holds lever 17 so that the detent 15 is in the arresting position. A cam 12, which makes a complete revolution in 150 ms., moves a tongue 23 to a contact S and spacing current through relay 16 rocks the lever 17 so that detent 15 is released. The tongue 23 is returned to the position shown by a spring. Subsequently the detent 15 is raised by relay 16 to engage the next tooth on the wheel 14 and the tape 22 is arrested with the stop element being transmitted. The stop condition is transmitted for a further 10 ms. after the tape 22 has been arrested until the projection 13 on the cam 12 again operates the tongue 23 to the contact S so that the relay 16 moves the detent 15 downwardly to release the wheel 14 and sprocket 21 to feed the tape to read off a further code combination of signal elements.
Patent GB-238414-A (GB)
Title: Improvements in carburetting-apparatus for use with internal combustion engines
IPC: F02M1/00
Filed: 1924-10-25
Abstract: 238,414. Pickard, W. Oct. 25, 1924. Separators. - In spray carburettors supplied with steam in addition to the usual fuel and air, the last traces of water are removed from the steam by a separa tor l communicating with the carburettor and provided with gauzes m, n, o and with a drain orifice p. The steam is admitted by a pipe and passes through the gauzes m, n, any water draining on to the gauze o and being ejected by the pressure of the steam. The gauze m may be omitted, all the steam then passing through the gauze n.
Patent GB-930004-A (GB)
Title: Infinitely variable mechanical torque converter
IPC: F16H33/18
Filed: 1959-07-24
Abstract: 930,004. Variable-speed epicyclic gear. P. L. CICIN. July 24, 1959 [July 24, 1958], No. 25439/59. Class 80 (2). An inertia gear comprises first and second planetary gear units with centrifugal masses driving the planet pinions and differential gearing between the two planetary units. In the arrangement shown, a driving shaft carries pinions 3, 26, 58 respectively engaging the planet carriers 4, 25 of the gear units and the differential casing 56. The carrier 4 of the first unit has shafts 8 carrying centrifugal masses 9 and pinions 11, 18 meshing with a sun-wheel 12 on the driven shaft 2 and with an annulus 23 having a sleeve portion 49. Similarly, the carrier 25 of the second unit has shafts 30 carrying centrifugal masses 31 and pinions 32, 46, meshing with an annulus 37 secured to the driven shaft 2 and a second annulus 39 with a sleeve 51. The sleeves 49, 51 have worm-wheels 52, 53 meshing with worms 54, 55 of differing pitches and connected by pinions 61. One-way driving connections are established between the masses 9, 31 and their associated planet pinions by pairs of abutments or coupling dogs 13, 14; 19, 20; 40, 41 and 33, 34, the various gear ratios being such that the couplings are permanently engaged in any transmission ratio between the drive and driven shafts 1, 2, whereby driving impulses from the masses are transmitted to the driven shaft while braking impulses are diverted from the driven shaft over the differential transmission either to the other planetary unit so as to drive the masses thereof in the sense opposite to that in which they move in supplying driving impulses, or to the drive shaft, so that the output torque is varied in accordance with the load acting on the driven shaft. In a second arrangement, Fig. 18 (not shown), the input shaft is driven by a motor coaxial with the output shaft by a crown pinion meshing with the pinion 3, and in a third embodiment, Fig. 19 (not shown), the differential is of the bevel gear type and the input and output shafts are coaxial.
Patent GB-648970-A (GB)
Title: Improvements in or relating to electrical wave transmission systems
IPC: H04N5/067
Filed: 1947-09-18
Abstract: 648,970. Secret transmission. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Sept. 18, 1947, No. 25509. Convention date, May 20, 1944. [Class 40 (iv)] [Also in Group XL (c)] A synchronizing signal for mixing with other transmitted signals comprises a pulse of one polarity immediately followed by a pulse of the opposite polarity. The invention is described with reference to a system in which speech or like signals S are multiplied by a periodic function K prior to transmission and multiplied by 1/K at the receiver, with a synchronizing pulse superimposed on the transmitted signal. In the equipment, Fig. 1, the transmit/receive switches are placed in positions T for transmission and D for reception. The signals K are obtained by transmitting pulses from the multivibrator circuit 1 along the delay line 2, tappings of which are variously connected to a common output lead either directly or via a phase reversing amplifier 51 according to the settings of the switches 27, 29 ... 35. The signals S and K are multiplied in the device 59, (see Group XL (c)), and fed via the mixer 63 and limiter 79 to the transmitter 81. A connection from the penultimate tap of the delay line is connected to a limiter 67 whose output triggers a flipflop circuit 71 to produce a positive pulse the trailing edge of which triggers the flip-flop circuit 77 to produce a negative pulse. The outputs of both 71 and 77, which together constitute the synchronizing signal are mixed at 63 with the coded signal, limited at 79 and transmitted at 81. The output from 77 is also used to synchronize the multivibrator 1. On reception at 85 the signal SK passes via the blanking circuit 93 to the multiplier circuit 59. The output K from the delay line, is passed to a circuit 101 which produces an output 1/K (see Group XL (c)), which is also fed to the multiplier 59, whose output S is fed to signal utilizing means 103. The output from the last tapping but two of the delay line after limiting at 89 triggers a flip-flop circuit 91 to produce a blanking pulse which eliminates the synchronizing signal from the output of the circuit 93. Part of the received signal is fed to a differentiating circuit 87 which produces a pulse in response to the synchronizing signal, the said pulse being placed on a pedestal pulse from the flip-flop circuit 71 which is triggered by the output from the last tapping of the delay line. The resulting pulse is sufficient to overcome the bias on the limiter 99 whose output triggers the flip-flop circuit 77 whose output synchronizes the multivibrator 1.
Patent GB-793520-A (GB)
Title: Magnetic sound recording tapes
IPC: G11B5/708
Filed: 1955-09-29
Abstract: 793,520. Magnetic structures. COUSINO, B. A. Sept. 29, 1955, No. 25663/57. Divided out of 793,519, [Group XXXVIII]. Class 38 (2). A magnetic recording tape comprises a continuous ribbon 12 of synthetic plastic such as polyethylene terephthalate orientated by stretching in two perpendicular directions, of cellulose acetate, a magnetic coating 13 on one or both sides of the ribbon, and a layer 14 of minutely divided graphite particles on one or both outer surfaces of the tape. The graphite, which may be deposited on the tape from a liquid which is then evaporated, reduces friction and prevents the build-up of static charges. The graphite may be in flakes of colloidal size, preferably all less than 5 microns, or at least 90 per cent less than 5 microns, the average size being not more than 2 microns. The liquid may be " Freon " (Registered Trade Mark), Fluron, isopropyl alcohol, carbon tetrachloride or petrol. The magnetic material may be an oxide.