baber/WOPTO huggingface dataset:
Patent GB-997572-A (GB)
Title: Fibre handling methods and apparatus
IPC: D01H5/74
Filed: 1962-03-05
Abstract: 997, 572. Compacting-fibres; drafting apparatus. DEERING MILLIKEN RESEARCH CORPORATION. March 5, 1962 [March 6,1961], No. 8407/62. Headings DID and D1N. A linear mass of fibres is compacted by advancing the mass through a zone where each successive part of the mass is acted upon by a cam-surface, and subjected to pneumatic force at least during part of the time when it is acted upon by the cam, the cam-surface extending obliquely on opposite sides of the path of the mass in directions which converge to the path. The fibres may be of staple or other character, and the mass may be in the form of a web from a carding- machine, or sliver &c. undergoing drafting. The cam-surface may act intermittently either by reciprocation or rotation, and be one of a set on a roll or apron e.g. in a drafting-set, when the cam surfaces are of U-or V-shape of which the legs need not be straight, arranged with intervening ridges. Two or more sets of ridges and recesses may be disposed side-by-side for a corresponding number of slivers. In Fig. 1, the cam-surfaces are formed as V-shaped slots on the lower front roller of a drafting-set which is hollow and connected at 33 to a source of low pressure. With the roller moving in the direction shown at a speed above that of the approaching sliver, the cam-surfaces exert a compacting force on the fibres, which are simultaneously subjected to suction,at the nip N. A suction aperture 41a beneath the roll may collect loose fibres. The recesses may only communicate with the inside of the roll at their apixes, and their limbs may taper in width and depth, the trailing-walls being relatively steep. A twin-roll, Fig. 4, may be driven at its centre by a cogged belt 45a engaging a cogged wheel on the roll between supports 47.
Patent GB-636514-A (GB)
Title: Improved means for detecting leaks in the enclosures of electric cables containing gas under pressure
IPC: G01M3/28
Filed: 1948-03-22
Abstract: 636,514. Indicating leaks in pipes. BRITISH INSULATED CALLENDER'S CABLES, Ltd., and HIBBITT, A. E. W. March 22, 1948, No. 8446. [Class 99(ii)] [Also in Group XXXVIII] To locate leakages in a gas-filled, electric-cable enclosure 4, the flow of gas at a test point is indicated at an observation point by means of a tuned reed positioned at the test point and vibrated by the flow of gas at that point, and a converter to transform the vibrations into an alternating current which is transmitted to the observation point. The pipe 4 is divided into sections A-E and is supplied with gas by a pipe 6. The gas passes from one section into another through a reed chamber 11 containing two reeds set at different frequencies which are also different for each chamber. The reeds vibrate between the poles of a magnet 28 to produce an alternating current in a coil 29 connected to a wave analyzer by a pilot line 12. The chamber 11 is connected to the pipe 6. by a conduit 38 and to the section A by a pipe 41. In a modification, Fig. 7 (not shown), the vibrations are transformed by two microphones. In a further modification, Figs. 8-11 (not shown), a spring-loaded valve is used to open a byepass across the reed chamber to prevent the reed being damaged by an excessive flow of gas. The chamber 11 may be positioned as depicted in Figs. 11 and 12 (not shown); an alternative arrangement is described, Fig. 13 (not shown), in which the pipe 6 is replaced by a number of pipes each set in the wall of the section and connected to its'respective chamber 11. A single reed may be used, Figs. 4 and 5 (not shown), and in a further modification the sections may be dispensed with.
Patent GB-624393-A (GB)
Title: Improvements in and relating to compositions comprising vinyl chloride polymers or interpolymers
IPC: C08L27/06
Filed: 1947-03-28
Abstract: To a polymer or interpolymer of vinyl chloride containing not more than 25 per cent of another ethylenically unsaturated compound is added not more than 150 per cent, based on the weight of said polymeric material, of a plasticizer consisting of one or more polyesters having a viscosity at 109 DEG  C. of at least 15 poises and derived from aliphatic glycols containing at least two carbon atoms per molecule and organic dicarboxylic acids, at least 50 per cent by weight of both glycols and the acids consisting of compounds having straight chain molecules with their functional groups attached one at each end of the chain, and at least 90 per cent of the acids being aliphatic, the ratio of total carbon atoms to carboxyl groups in the polyester being at least 4.5 to 1.  Up to 10 per cent of the methylene groups connecting the ester groups may be replaced, if desired, by oxygen and/or up to 5 per cent of the methylene groups may be replaced by sulphur atoms, if desired. Interpolymers specified are those with ethylene, vinyl acetate, vinylidene chloride, styrene, methyl methacrylate, methyl-a -chloracrylate, acrylonitrile, fumaric esters and maleic anhydride.  Glycols specified are ethylene, trimethylene, pentamethylene and hexamethylene glycols.  Acids having carboxylic groups at each end of the chain are glutaric, adipic and sebacic acids.  Branched chain glycols or glycols having non-terminal hydroxy groups which may be used in conjunction with the straight-chain glycols are 1,2-propylene-, 1,3-butylene- and 1,3-isobutylene glycols.  1,2-Propane dicarboxylic, 1,3-butane dicarboxylic, methyl adipic and 1,3-isobutane dicarboxylic acids may be used in conjunction with the straight-chain acids having terminal carboxy groups.  Aromatic acids which may be used are phthalic and hexahydro-phthalic acids.  Compounds specified in which oxygen and/or sulphur separate the functional groups are diethylene glycol, triethylene glycol, 2-ethoxy ethanol, diglycollic acid, thiodiglycol and thiodiglycollic acid. Stabilizers such as calcium stearate, fillers, pigments and other plasticizers may be added.  The compositions may be made into sheets, films, used in umbrellas, curtains, and for sheathing electric cables.  Specifications 387,928, [Group V], and 599,523 are referred to.
Patent GB-961068-A (GB)
Title: Improvements in and relating to flow control valves
Inventor: SHUMANN ALEC
IPC: B65D83/14
Filed: 1962-03-05
Abstract: 961,068. Aerosol containers. BESPAK INDUSTRIES Ltd. March 1, 1963 [March 5, 1962], No. 8476/62. Heading FIR. [Also in Division F2] An aerosol dispenser valve comprises a core member 10 providing a flow passage therethrough which includes a radial bore 11 opening out of the core, this core being embraced by a sealing member having a first flexible part 20 of generally tubular form engaging the core in the region of the bore 11 to seal it, and a second part 21 extending radially from one end of the first part, the arrangement being such that upon relative axial movement between the core and the second part of the sealing member, the tubular part 20 is distorted so as progressively to move out of engagement with the core to an increasing extent if its length, starting from said one end thereof, as the relative movement proceeds whereby to expose the end of the bore 11. The parts are assembled in a body 14, 17 of the dispenser which clamps the outer edge of the sealing member. In a modification, Fig. 2a, the radial part, 31, extends in a plane from the tubular part, 30, and engages, at an intermediate radial position, a fixed abutment 35 on depression of the core 10. In another modification, the tubular part 20 is thickened and has spaced annular grooves engaged over corresponding collars on opposite sides axially of the bore 11; on opening the valve the lower groove disengages the corresponding collar to expose the bore 11.
Patent GB-234238-A (GB)
Title: Improvements in or relating to variable speed gears
Filed: 1924-04-04
Abstract: 234,238. Carling, W. T. April 4, 1924. No Patent granted (Sealing fee not paid). Controlling different functions by same lever. - Changing speed upon vehicles is facilitated by reducing the fuel supply prior to the speed change, or by weakening such supply by admitting air. When a control lever 21 is moved in either direction, a pawl 12 or a pawl 13 engages a spring rod 9 and moves it to the left. A tappet 6a strikes the fuel control lever 5 to operate it prior to the speed change. On continued movement, the pawl 12 or 13 is disengaged by a stop 23 or 24, when the rod 9 and lever 5 are released. Specification 194,152. [Class 80 (ii), Gearing, Variable-speed &c.], is referred to.
Patent GB-620757-A (GB)
Title: Improvements in or relating to apparatus for measuring mutual conductance
IPC: G01R31/25
Filed: 1946-03-19
Abstract: 620,757. Measuring mutual conductance. SANGAMO WESTON, Ltd. March 19, 1946, No. 8555. Convention date, Oct. 31, 1945. [Class 37] For measuring the mutual conductance of a valve the anode and grid are supplied with A.C. of different frequencies. A transformer T has a primary winding 1 and secondary windings 2, 3, 4, 12 for supplying energizing potentials to the valve B to be tested and to a signal source A for generating a higher frequency signal voltage. A series inductor 5 is included in the anode circuit of the valve B and is shunted by a resistor 6 in series with a condenser 7 having a low impedance at the signal voltage frequency. The voltage drop across the inductor 5 develops a current in the resistor 6 that is measured by a rectifier meter 8 in series with a resistor 9. The grid signal generator A includes a triode 11 and grid and anode inductances 13, 14 coupled by a magnetic core 15. The anode voltage is supplied from the secondary winding 4 through a switch 17. A winding 23 on the core 15 is connected across a resistor 24, which is connected between the grid of the valve B and the grid-biasing secondary 3 of the transformer T. A tap switch 25 permits adjustment of the magnitude of the signal voltage applied to the grid of the valve B. The signal voltage generator A is operative only during those halfcycles during which the anodes of the valves 11, B are positive with respect to their cathodes, and generates pulses of comparatively high frequency (e.g. 5 kilocycles for a power line frequency of 50 to 60 cycles per second). The values of the inductor 5 and condenser 7 are so chosen that the low-frequency anode current is excluded from the meter 8, which measures the current of signal frequency and may be calibrated directly in values of mutual conductance if the voltage source is substantially constant. D.C. potentials may be applied to the grid, screen, and suppressor electrodes of the valve B, with A.C. applied to the anode through a frequency selective network. The same D.C. may be employed for energizing the signal voltage generator.
Patent GB-550642-A (GB)
Title: Improvement in and relating to conveyor system
IPC: B65G23/44
Filed: 1941-07-08
Abstract: 550,642. Conveyers. WINGFOOT CORPORATION. July 8, 1941, No. 8612. Convention date, Aug. 2, 1940. [Class 78 (i)] An endless belt conveyer 10 subject to varying loads is tensioned by two counterweights 24, 36 located one on each side of a drive-transmitting drum 28. The conveyer is of the type receiving intermittent charges by a shoot 40, and conveying them over irregular terrain in which the load A, B may at times be descending a slope, and at times ascending an incline. The drum 28 is connected by a belt 31 to a motor-generator set 33 whereby at the times when the balance of load is rising power is transmitted to the drum 28 by the motor 33, and at the times when the balance of load is falling and tending to speed up the conveyer, a braking effect is produced by the set 33 acting as a senerator. The weight 24 is connected by a cable 22 to a bearing 19 for the end pulley 17, the bearing 19 sliding in frame guides 20. Stops 26 limit the rise of the weight 24. The weight 36, similarly limited in upward movement by stops 39, is connected by a cable 37 to an idle pulley 35 arranged between two supporting pulleys 34. Idle rollers 11, 12 give support to the belt, the rollers 11 being tripartite to give the upper traverse of the belt a channel form. Several conveyers may be arranged angularly to one another to carry material across long distances.
Patent GB-1504409-A (GB)
Title: Mixing particulate materials
IPC: B01F33/40
Filed: 1975-02-28
Abstract: 1504409 Mixing particulate materials OCCIDENTAL PETROLEUM CORP 28 Feb 1975 [7 March 1974] 8627/75 Heading B1C For mixing two particulate materials (e.g. hot coal char and coal to form a gas) a stream of fluid (gas) containing a first material is passed down through inlet 12 having an accelerating nozzle 16 surrounded by a reactor pipe 20 and an annular chamber 30 into which a second stream of fluid (gas) containing the second material is fed by tangential inlet 32. The second material is fluidised in chamber 30 and rises up and into reactor pipe to surround the centrally disposed first stream and the two are mixed. The product gas and hot char may be finally separated in a cyclone separator and may be recycled. In a modification, Fig. 2 not shown, the inlet 32 (35) may have a vertical portion (40) for receiving the second material and a horizontal portion having a fluidizing air slide for initial fluidization. In other modifications Figs. 3, 4 not shown a fluidizing air plate may be provided in chamber 30 to which the second material is added directly by a pipe (42).
Patent GB-472803-A (GB)
Title: Improvements in sighting instruments for measuring angles
IPC: F41G3/00
Filed: 1937-03-24
Abstract: 472,803. Sighting instruments for measuring angles. OESTERREICHISCH UNGARISCHE OPTISCHE ANSTALT C. P. GOERZ GES., and MAURER, M. March 24, 1937, No. 8708. [Class 97 (ii)] A front reflector attachment 6 for varying the direction of the sighting line is provided and the graduated circle 7 may be adjusted about its axis through an angle corresponding to the change in direction of the sighting line effected by the reflector so that readings may be taken as if the sighting line were aligned with the axis of the eyepiece 5b. As shown, the base-plate 1, adapted to be secured to the cradle of a gun, carries a vertical spindle 2 on which is rotatably mounted the huh 3a of a fork 3 carrying the direct vision telescope 5 by means of horizontal trunnions 4. The graduated circle 7 is rotatable on a disc 3b on the hub 3a and may be fixed thereto, with one of the graduations 0‹, 90‹, 180‹, 270‹ coinciding with an index 1c on the plate 1 when the telescope axis is parallel to the plane of pivoting movement of the gun barrel, by the engagement of a spring plunger 9 on the disc 3b with one of four radial grooves in the circle 7. The reflector attachment 6 deflecting through an angle of 90‹ is used when observing an aiming mark lying more than Œ45‹ laterally of the direction of fire and may carry a bevel gear 6b engaging teeth 7b on the circle 7 so that rotation of the reflector 6a through Œ90‹ from the central position, in which it is adapted to be fitted to the telescope, automatically adjusts the circle through Œ90‹. The telescope 5 is adjusted about the horizontal axis 4 by the knob 13 and about the vertical axis 2 by the worm gear 14.
Patent GB-662562-A (GB)
Title: Improvements in or relating to adhesive compositions and methods of bonding involvinguse thereof
IPC: C09J127/06
Filed: 1949-03-31
Abstract: An adhesive composition comprises a rubbery butadiene-acrylonitrile copolymer, one or more vinyl chloride-acetate copolymers, basic zinc carbonate and a resinous chlorinated paraffinic or aromatic hydrocarbon, e.g. chlorinated diphenyl.  Plasticizers, e.g. dioctyl phthalate and solvents, e.g. methyl ethyl ketone, may be added.
Patent GB-751994-A (GB)
Title: New derivatives of alkaloids
IPC: C07D489/02
Filed: 1954-03-25
Abstract: The invention comprises alkaloid esters of the formula <FORM:0751994/IV(a)/1> where A is the residue of an alkaloid A(OH)n, n is 1 or 2, x is 0 or 1 and R is a straight chain aliphatic hydrocarbon radical of 7 or more carbon atoms; also salts of the esters; the ester groups are attached to cyclic carbon atoms.  The esters are made by reacting the alkaloids with fatty acids or their derivatives such as halides, anhydrides or esters, preferably by refluxing in an anhydrous organic solvent.  Examples show the production of morphine dimyristic ester and its hydrochloride, morphine 6-myristic ester 3-benzyl ether and hydrochloride, boldine di-myristic ester, morphine 3-myristic ester and hydrochloride and codeine myristic ester and hydrochloride.  Other products mentioned are the capric, lauric, stearic, behenic, pelargonic and oleic esters of codeine, and their hydrochlorides.
Patent GB-915775-A (GB)
Title: Improvements in refrigerant compressors
IPC: F04B39/12
Filed: 1961-03-10
Abstract: 915,775. Compressors. TECUMSCH PRODUCTS CO. March 10, 1961 [March 16, 1960], No. 8805/61. Class 8(1). An electric motor driven compressor unit 10, Fig. 1, suitable for use with a refrigerant is yieldably mounted within a housing 12 by at least three spaced coil springs 46 each having one end screwed into a threaded socket 44 of the crankcase 42 and the other end screwed into a threaded aperture 48 in an inwardly extending arm 50 of an L-shaped bracket 52 the stem 58 of which is wedged within a socket 40, Fig. 3, formed by the offset central portion 38 of a strip 32 secured at its ends 36 to the housing wall 34 intermediate the base and cover 14 thereof. The clearance between the crankshaft 68 and the housing cover 14 is less than the deflection of the springs 46 and the cover thus acts as a stop to maintain the springs in tension.
Patent GB-808184-A (GB)
Title: Improvements in or relating to cutter-blade holders
IPC: B23B29/04
Filed: 1956-03-21
Abstract: 808,184. Tool-holders. COOKE, A. J. P., COOKE, W. P., and WELLS, T. R. March 21, 1957 [March 21, 1956], No. 8831/56. Class 83(3). A tool-holder comprises a body 1 having a recess 3 to receive the tool 2 and a number of tool-gripping elements 5 distributed along opposite walls of the recess. The socket head screws 5, with flat or rounded &c. tool-engaging ends 6, are disposed face-to-face across the recess or are slightly offset axially, and may also exert different gripping-pressures to produce undulations in the length of the tool and thus increase the grip. A shorter tool 2 may bear at its end against a stop-pin, and the body 1, of rectangular or round &c. cross-section, may be integral or built-up and have an interrupted recess 3. In a modification, Fig. 6, e.g. for use in cutting square threads, the body 1, with a single row of screws 5 on each side of the recess 3, is angularly-adjustable in a part 8 in which it is clamped by screws 9. One end of the part 8 may be graduated adjacent the tool 2 to facilitate adjustment.
Patent GB-826611-A (GB)
Title: Improvements in bearings and housings therefor
Inventor: WALKER WILLIAM HENRY
IPC: F16C35/067
Filed: 1957-03-19
Abstract: 826,611. Jointing by stamping. WALKER & SCHOFIELD Ltd. March 18, 1958 [March 19, 1957], No. 8909/57. Addition to 779,765. Class 83 (4). [Also in Groups XXV and XXXIV] In a modification of the method of securing a ball or roller bearing race in a housing described in the parent Specification, the ring C is formed with a notch c on its periphery to facilitate its removal from the housing. Also the thickness of the ring C at its periphery is reduced.
Patent GB-290016-A (GB)
Title: Improvements in tennis and like racquets
IPC: A63B51/00
Filed: 1927-04-02
Abstract: 290,016. Robinson, G., and Robinson, J. April 2,1927. Rackets.-Relates to tennis and like rackets of the type in which the mesh is formed of a number of short lengths of string, and consists in that each length preferably forms two strings of the racket and the ends of each length are retained in position without the use of wedges or other retaining devices by passing them through holes in the frame and alternately under a portion of the string itself. Four holes a<1> - - a<4>, Figs. 4 and 5, connected by grooves c are provided in the frame for securing the ends of each length of string. One end is secured by passing the string from the inside of the frame through the hole a<1>, back through the hole a<2>, out again through the hole a<4>, and finally passing it be. neath that part of the string lying between the holes a<1>, a<2>. The other end is secured in a similar manner using the holes a<4>, a<3> and a<2>. The length of string terminating at the wedge is secured by the provision of four holes d<1> - - d<4>, Figs. 1 and 10. One end is secured by passing it through the holes d<1>, d<2> and d<3> in the order named and passing it under the part of the string lying between the holes d<1>, d<2>. When each string is formed of a separate length, three holes are provided in each side of the frame for securing purposes.
Patent GB-689166-A (GB)
Title: Improvements in magnetic amplifier
IPC: H03F9/02
Filed: 1949-04-04
Abstract: 689,166. Magnetic amplifiers. LEEDS & NORTHRUP CO. April 4, 1949, No. 9116/49. Class 40 (iv). To prevent an input overload paralysing a magnetic amplifier, the amplified output is shunted by a non-linear voltage - responsive device, e.g. a copper oxide or selenium rectifier, in series with a resistor series connected with the amplifier input circuit, so as to produce negative feed-back which is effective only upon such overload conditions. A further resistor in series with the input circuit may be connected in series with the output to produce normal negative feed-back to enhance linearity of the amplifier. As shown, the magnetic amplifier comprises two push-pull stages in cascade. The input 10 which may be a D.C. source the polarity of which may vary, e.g. a thermocouple, or a low frequency A.C. is series connected with resistors 52, 53, 55 and the control coils 11, 12 of similar saturable reactors 13, 14. The reactors are also respectively energized in known manner by bias coils 20, 25 fed through a rectifier 39 from a supply transformer 32 and by a pair of A.C. coils 22-23, 27-28 fed from supply transformer 32 in series with positive feed-back coils 21, 26 and load resistors 35, 37 which are energized through full, wave rectifiers 34, 36. The energization of the bias windings is controlled differentially by a potentiometer 48 to produce zero output across the load resistors 35, 37 at zero input. Varia. tions in the input potential then produce corresponding amplified voltage variations across the load resistors which are applied to the input of the second stage of the amplifier which is similar to the first. The second stage out. put across load resistors 35a, 37a is fed through an ammeter 67 and resistors 68, 55, the output current flow through the resistor 55 producing a negative feed-back voltage in the input circuit to enhance the overall linearity of the amplifier. The feed-back resistor 55 may alternatively be connected in the output of the first stage. The resistor 53 in series with the input control coils in the first amplifier stage is also connected in series with oppositely poled copper oxide or selenium rectifiers 70 across the output of the first stage. During normal operating conditions the negative feedback effect produced by this circuit has substantially no effect owing to the high resistance of the rectifiers but on overload the resistance rapidly reduces whereupon the negative feed-back thereby introduced nullifies the effect of the overload on the amplifier. The resistor 52 in the input circuit is shown similarly connected in series with reversely poled copper oxide rectifiers 74 across the output of the second stage to produce a similar overload control but either one of these control circuits may be dispensed with.