baber/WOPTO huggingface dataset:
Patent GB-942676-A (GB)
Title: Process for the production of polymerized caprolactam and filaments, threads, fibresand the like shaped structures thereof
IPC: D01F6/60
Filed: 1960-09-02
Abstract: 942,676. Aftertreating polycaprolactam. H. J. ZIMMER, [trading as H. J. ZIMMER VERFAHRENSTECHNIK]. Sept. 2, 1960, No. 30409/60. Heading C3R. A process for the treatment of polymerized caprolactam to reduce the content therein of constituents having a molecular weight which does not exceed 460, comprises subjecting the polymerized caprolactam to a vacuum treatment for a period of from 15 to 100 minutes, then to a subsequent thermal treatment for a period of from 1 to 4 hours, the vacuum treatment and subsequent thermal treatment being repeated at least one more time. In the vacuum treatment, the polymer in the form of a thin layer presenting a large surface area (e.g. in a thin layer evaporator) is subjected to a pressure of up to 0À6 mm. Hg at a temperature of 240 to 270‹C. In the thermal treatment, the polymer in the form of a static or closed mass is subjected to a temperature of 240 to 300 ‹C., the pressure not being oritical. The examples describe the polymerisation of caprolactam in the presence of: (1) water and adipic acid and (2) water and acetic acid, the polymers then being subjected to the process of the invention.
Patent GB-1424563-A (GB)
Title: Conveyance of developer mixture in an electrophotographic copying apparatus
IPC: G03G15/08
Filed: 1973-06-27
Abstract: 1424563 Conveyers HOECHST AG 27 June 1973 [30 June 1972] 30541/73 Heading B8A [Also in Division G2] Developer powder is fed from a stock 9 to a cascade shoot 16 (or magnetic brush, not shown) by an endless conveyer belt 13 from which project plates 14 arranged so that as the belt moves upwards some of the developer spills over the sides and edges of the plates 14 and returns to the stock 9 to mix with tonerdepleted developer returning from the development zone. Fig. 2 shows a stationary developer guide plate (12) adjacent the lower part of the belt, Fig. 3 shows an angled, compact belt arrangement and a stirrer (35), Fig. 4 shows a one-piece plastics belt driven by toothed rollers, and Figs. 5, 6 each show an extra belt (17) having plates (18) interleaved with the plates 14 to increase developer circulation. A drum with projecting vanes may replace the extra belt.
Patent GB-275465-A (GB)
Title: Improvements in means for driving descaling and like rotary tools
IPC: B08B9/04
Filed: 1926-12-03
Abstract: 275,465. Thompson, G. H. Dec. 3, 1926. Driving-arrangements. - Descaling and other rotary tools are driven by means of a flexible. shaft p from an enclosed electric motor which is provided at one end of the casing a with a projecting spigot coaxial with the spindle j, and the spigot receives a rigid tubular extension h carrying at its outer end the casing o of the flexible shaft. The -extension h is screwed on to the spigot and has at its outer end a split sleeve m which serves to clamp the casing of the flexible shaft. The flexible shaft is connected to the motor spindle by a sleeve or other coupling q. The motor is bolted to a wheeled running frame c which also carries the starter e, and the casing is provided with the usual ring bolts or handles f, g for lifting purposes. If the motor is required to operate. away from the running frame, the starter may be bolted to the base.
Patent GB-680510-A (GB)
Title: Improvements in or relating to self-closing taps for liquids
Inventor: WOODHOUSE GEOFFREY
IPC: F16K21/12
Filed: 1950-12-15
Abstract: 680,510. Self-closing taps. WOODHOUSE & CO., Ltd. July 2, 1951 [Dec. 15, 1950], No. 30596/50. Class 135. In a self-closing tap opened by spring-loaded push-button 20, Fig. 1, an auxiliary valve 27 opens to release liquid from beneath a leaky piston 25 slidable in a cylinder 34 Which is supported in the tap body by a spring- washer 32 to permit lateral movement of the piston on the valve spindle 19. Following depression of the push-button and the taking up of the lost motion between a collar 30 on the spindle 19, the main valve 23 opens. The tap slowly closes by the leakage of liquid past the piston into the cylinder. The button 20 may be replaced by a lever 45, Fig. 1a, pivoted to a lug 44 on the tap body 43.
Patent GB-781307-A (GB)
Title: Sand blasting device
IPC: B24C3/06
Filed: 1954-10-25
Abstract: 781,307. Sand blasting. KING, E. R. Oct. 25, 1954 [June 19, 1954], No. 30692/54. Class 60. A sand blasting device comprises a container 10 for the sand, with a filling opening closed by cap 64. A cover 11, threaded on the neck of the container, carries a tube 46 extending down into the container. The lower end of the tube carries a ring with a small orifice 47 therein and the upper end of the tube communicates with a nozzle 16. A hollow member 50.secured to the nozzle has a flange 51 and is removably attached to the boss 44 of the cover 11 by a threaded coupling 56. The inner end of the nozzle 16 is of reduced diameter on which is seated a member including a disc-like portion 58 seated in a shoulder 53 of the part 50 ; the member is formed with a shoulder 60 engaging the end face 41 of the boss 44 so as to space the disc 58 from the end face, forming an annular chamber 59. The disc 58 has a number of orifices therethrough and a number of orifices 63 are provided in that part of the nozzle 16 within the member 50. A source of compressed air is connected at 24 to the hand grip portion 17 of the cover 11, admission of air being controlled by a manually operated valve 28. The air passes through channels 26, 25, 40, to the annular chamber 59 and thence through channels 55, 45 into the container 10. Sandladen air passes up through the tube 46 and channels 42, 43 and out through the nozzle 16. Air from the annular chamber 59 passes through the orifices in the disc 58' and through the orifices 63 in the nozzle so as to mix with the sandladen air.
Patent GB-408715-A (GB)
Title: Shock absorber
IPC: F16F9/14
Filed: 1932-11-01
Abstract: 408,715. Shock-absorbers. KELSEYHAYES WHEEL CO., Ltd., HAMILL, W. W., and ARON, E., Dagenham Dock, Essex. Nov. 1, 1932, No. 30697. [Class 108 (iii).] In shock-absorbers of the movable vane type in which the working chamber comprises a casing and a closure member welded thereto the parts are formed of sheet or plate metal welded together to form a working chamber. As shown the member 14 is formed of sheet or plate metal and rotatably seated therein is a disc 4 having integral, or welded thereto, vanes 15 all secured to a stud 8 which is fixed to the frame or axle of the vehicle and constitutes the stator. The dished member 14 is also provided with vanes 10 welded to a disc 5 which is welded together with a cap 7 and a second cap 16 to the dished member to constitute the rotor. The cap 7 has an integral arm 6 connected to the other movable part of the axle or frame. A reservoir 18 is formed between the cap 7 and the springy cap 16 which reservoir is in communication with the chamber 3 by means of apertures 19, 20 with a ball valve 21. The movable vanes 10 are provided with an adjustable link 24 and equalizing passages 33 are provided in the stud 8. A bearing packing may be provided comprising a raw-hide ring 27 .and a cork ring 28. The arm or link member may be formed of two sheet metal parts 38, Fig. 7, welded together and provided with bosses 36.
Patent GB-630694-A (GB)
Title: Improvements in or relating to valves
IPC: F16K15/04
Filed: 1946-10-16
Abstract: 630,694. Valves. PARKER APPLIANCE CO. Oct. 16, 1946, No. 30746. Convention date, May 13, 1943. [Class 135] A valve has a resilient annular seat with a thin flexible lip and an integral thicker non- flexible portion. In a valve, e.g. a sump selector valve for aircraft fuel tanks, the passages from the two inlets 41, Fig. 1, to the outlet 6 are controlled by balls 22 rolling in guides 23 when the casing 5 is tilted to contact rubber ring seats 14 on a flexible lip portion 21, Fig. 4, under light gravitational pressure, and stopping against the edge of a metal flange 16 under still heavier pressure. The flange retains the seat in a recess 11 and is held in place by a snap ring 25. A pendulum 34, suspended at 35 in a slot in a baffle 31, has extensions 37 which contact the balls to prevent both seating at the same time.
Patent GB-1135329-A (GB)
Title: Receiver tuning indicator
Inventor: BUCK ROBERT ARTHUR
IPC: H04L27/16
Filed: 1966-07-08
Abstract: 1,135,329. Tuning indicators. STANDARD TELEPHONES & CABLES Ltd. 8 July, 1966, No. 30764/66. Headings H3Q and H3T. The invention relates to tuning indicators for tone-keyed receivers where at any instant only one frequency of two possible frequencies is present, or a signal is present in only one of two possible signal paths in the receiver, e.g. in frequency-shift telegraphy. The former case arises when the incoming signals are converted to an I.F. of 100 KHz, displaced 100Hz on each side for the mark and space conditions respectively. Each 100 Hz sideband is accompanied by other sidebands of lower amplitude, and the invention avoids the possibility of tuning the receiver to one of these loweramplitude sidebands, or to receive the mark signal in the space channel or vice versa. In the other form of receiver the mark and space signals are both converted to the same frequency, e.g. 5 KHz, but appear in separate channels. According to the invention (Fig. 8) the signals in these two channels are combined and applied to a two-stage limiter 2, followed by a band-pass filter 3 which rejects the loweramplitude sidebands which are not 5 KHz. The constant-amplitude output is rectified by the base-emitter junction of transistor 40 and appears amplified at the collector. The signalfrequency components are removed by filter 51-53 and the D.C. component applied to a meter 61. When no signal appears, the meter shows a maximum reading. When either a space or a mark signal is present, the collector voltage of transistor 40 becomes less negative and the meter reading falls. When the receiver is correctly tuned, there will be at any instant either a space or a mark signal present, but off  tune one or both of these will be absent or of lower amplitude. The minimum reading on the meter therefore shows the correct tuning point. If the mark and space signals are respresented by different I.F.'s the above circuit is duplicated (Fig. 9, not shown) using separate diodes as rectifiers instead of the base-emitter junction of transistor 40, and separate band-pass circuits tuned to the appropriate frequencies. Transistor 40 acts as common amplifier for both signals. This arrangement may be extended to more than two channels, and may also be used where the signals are of the same frequency to reduce errors due to beats. The channels may be separated after the limiter (Fig. 4, not shown). Variations of modulation rate due to successive signals being of the same kind (e.g. two successive bits being both mark) shift the position of the sideband of maximum amplitude but this remains within the pass band of the filter.
Patent GB-228119-A (GB)
Title: Wood preservation
IPC: B27K3/52
Filed: 1924-12-22
Abstract: 228,119. Grasselli Chemical Co., (Assignees of Howald, A. M.). Jan. 23, 1924, [Convention date]. Waterproofing; fireproofing; proofing against fungi and vermin; proofing compositions. - An emulsion of an aqueous preservative dispersed in an oily preservative is forced into wood. In an example given, zinc chloride solution is dispersed in a mixture of asphaltic petroleum residue and asphaltic base crude oil.
Patent GB-935185-A (GB)
Title: Improvements relating to self-propelled vehicles having an hydraulic transmission system
IPC: B60K17/10
Filed: 1960-09-07
Abstract: 935,185. Hydrostatic transmissions. LINDE'S EISMASCHINEN A.G. GES. FUR. Sept. 7, 1960 [Sept. 8, 1959], No.30825/60. Class 69 (2). [Also in Group XXXI] In a tractor hydraulic transmission, an internalcombustion engine drives through gears 2, 3 a pump 4, the output and direction of which is controlled by a lever 15, the pump driving a motor 5 from which the wheels 13 and 14 are driven through bevels 8 and 9 and differential gear 10. The differential may be temporarily locked by a clutch 16. A second pump 25 is driven through a gear 24 and its output may be directed to a power lift mechanism 29, to a motor 33 driving a winch, to a motor 30 providing a power take-off shaft for a mowing machine or to the supply and return lines 6 and 7 of the main transmission by a distributing valve 28. The output of the pump 25 may be manually controlled by a lever 37. The output control lever 37 is connected to a piston 45 connected by a line 46 to the discharge line 26 of the pump 25, and to a device 38 by a spring-loaded plunger 40, the loading of which can be adjusted by a rod 42. When the pressure in the output line 26 exceeds a predetermined amount, the force on the piston 45 exceeds the force exerted by the spring 44 and the control lever is operated to diminish the pump's output by a pivotal movement of the pump housing. The device 38 may be connected to a position-adjusting member connected to the distributing valve 28 so as to cause pre-loading of the spring 44 at different values according to the use to which the output of pump 25 is being put. The pre-loading member may also or alternatively be connected to the valve 28.
Patent GB-1446582-A (GB)
Title: Filter tank assembly
Filed: 1973-06-28
Abstract: 1446582 Filters T Y CRASTER 28 June 1973 30864/73 Heading BID  A sand filter tank 1 has a removable valve 7, 8 rotatable between filtering and backwashing positions. In the filtering position, contaminated liquid is passed to bed 18 via inlet 80, pipe 14 and reticulated or perforated member 40 and filtered liquid is discharged via drain chamber 35, perforated or reticulated member 36 and flexible riser 17 to outlet 10. In the backwashing position, cleaning liquid is passed to bed 18 via inlet 80, riser 17, member 36 and chamber 35 and the cleaning liquid is discharged from bed 18 via member 40, pipe 14 and outlet 9 which includes a plate 38 restricting its cross-section. The cup-shaped member 36 may be positioned in an upright position with a deflecting plate over its mouth. The bed 18 is supported on screen 20 clamped to apertured plate 21. The bottom of the tank 1 is provided with a removable cover plate 6.
Patent GB-1535659-A (GB)
Title: Orthopaedic appliances enabling paralytics to stand up
IPC: A61F5/01
Filed: 1977-07-22
Abstract: 1535659 Orthopaedic appliances INSTI TUT NATIONAL DE LA SANTE ET DE LA RECHERCHE MEDICALE 22 July 1977 [23 July 1976 13 May 1977] 30963/77 Heading A5R A splint assembly for enabling parolytics to stand erect comprises support pieces 1-5 positionable around respective body parts, each support piece including a plurality of inflatable tubes for extending vertically over the outer side of the body part, each support piece being held on the body part by at least one belt comprising strips 11a, 11b of unstretchable material, and mechanical supporting devices 6-9, each connecting together two vertically adjacent support pieces, each supporting device comprising two rows of pins connected by an articulation, each row of pins being attached to the inflatable tubes of a respective support piece. The mechanical supporting devices have a latch for locking the articulation. Preferably, one set of pins is removably secured to the articulation. The inflatable tubes are preferably of rectangular cross section, the widths of the tubes at the centre of each support piece being greater than those towards the side edges thereof.
Patent GB-237497-A (GB)
Title: Improvements in or relating to railway and tramway switch boxes or ground levers
IPC: B61L5/02
Filed: 1924-12-29
Abstract: 237,497. Wrightson, S. S., and Matthews, C. R. Dec. 29, 1924. Ground levers; spring operation.-The spring toggle SP is actuated by a hand-lever L through a horned bell-crank BC and a pulling rod CPR which acts in a line tangential to the line of movement of the horns H, H<1>, the rod CPR and crank BC being normally disengaged to permit trailing through. The rod CPR acts through a pin PP which engages a cam HC formed as part of the casing to return the rod to its normal position of rest. The crank BC is pivoted at P and is connected at M to the spring toggle SP, holes R', R<2> being provided for the connecting rod. The spring toggle includes a telescopic arm TA slotted at E and carrying a washer W in engagement with the axis pin F. Movement of the crank BC is limited by its horns H, H<1> engaging stops S, S' on the casing. Fig. 3 shows the crank for a two-way lever and Fig. 13 for a one-way lever. The hand-lever L may be jointed to lie flush with the roadway or may carry a pedal FS, Fig. 12, hinged to an arm FL secured by a recessed plate SW. If a bent hand-lever is used, it will return to its original position, but with a straight lever the snap-over action is reduced by a lever Z and spring-pressed plunger PR, a horn X' limiting the movement of the lever Z.
Patent GB-1279155-A (GB)
Title: Electrical indicating instruments
IPC: G01D7/06
Filed: 1969-06-19
Abstract: 1279155 Optical pointers WESTON INSTRUMENTS Inc 19 June 1969 [9 Aug 1968] 31053/69 Heading G2J A vane 40, in the form of a partially light transmitting filter, is attached to the pointer 42 of an electrical indicating instrument 41 and the edge of the filter is arranged to intercept a light beam travelling from a source 22 to a screen 17. The image on the screen is thus one of two contrasting bands of light, the relative lengths indicating the magnitude of the electrical signal detected. The filter may be coloured.
Patent GB-741263-A (GB)
Title: Olefinic aldehyde acylhydrazones
IPC: C07D213/86
Filed: 1953-11-10
Abstract: The invention comprises compounds of the formula A-CO.NH.N=CH.R wherein A is a heterocyclic radical, optionally substituted by a nitro group, and R is an aliphatic hydrocarbon radical corresponding to the carbon chain <FORM:0741263/IV(a)/1> containing one or more double bonds.  They are prepared by reacting the hydrazide A-CO.NH.NH2 with an unsaturated aldehyde corresponding to the above hydrocarbon radical, e.g. by refluxing in a lower aliphatic alcohol. The examples describe the preparation of (1) citral isoicotinyl hydrazone; (2) citronellal isonicotinyl hydrazone; and (3) 3,5-dinitro-2-thenoyl hydrazone.
Patent GB-797332-A (GB)
Title: Transistor voltage-converter
IPC: H02M3/338
Filed: 1956-10-12
Abstract: 797,332. Converting. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Oct. 12, 1956 [Oct. 15, 1955; Aug. 30, 1956], No. 31154/56. Class 38 (2). A converter for supplying a higher direct voltage to a load R from a low direct-voltage source E, comprises an oscillator with a junction transistor F, a transformer T having its primary winding connected in series with source E and the emitter-collector path of the transistor, and its secondary winding connected to load R through a rectifier L in such a way that the unsmoothed load current-or a current proportional thereto-passes through the baseemitter junction in its conducting condition. The load current flows through the loop, including source E, base-emitter junction b, e, the secondary winding of transformer T, rectifier L and load R. A smoothing capacitor C is in parallel with the load. From tapping t, a regenerative feed-back by a voltage substantially independent of the load, is taken through capacitor Cl to emitter e, to produce adequate blocking voltage on base b during the non-conducting interval of the transistor. A capacitive division of the voltage across the secondary winding may be provided, Fig. 2 (not shown). The circuits are stated to exhibit improved starting, ability carry overload, and output voltage/load characteristic.
Patent GB-617702-A (GB)
Title: Improvements relating to electric starting mechanisms for internal combustion engines
IPC: F02N11/08
Filed: 1946-10-21
Abstract: 617,702. Starting prime-moulds. C.A.V., Ltd., BEVIS, W. A., and THORPE, E. H. C. Oct. 21, 1946, No. 31183. [Class 38 (iv)] In a starting system for an internal combustion engine in which a pinion of a battery operated motor is slid by electromagnetic moans into engagement with a gear-wheel on the engine, an electromagnetic switch, operated by the motor current, starts a time switch when the engine becomes self-running and this switch upon timing out actuates a further electromagnetic switch to interrupt the supply to the starting motor. In the system shown, closure of a manual switch e energizes a starting coutactor c, d of the motor a over the normally closed contacts f of a further contactor f, g, the heavy starting current of the motor opening the contacts i of an electromagnetic switch h, i. When the engine becomes self-running the motor current falls causing contacts i to close, so that current from battery b passes through a bimetal strip k carrying one of a pair of contacts j which normally short-circuit the winding g of contactor f, g. The consequential heating of the strip eventually opens contacts j, thereby energizing the contactor which opens its contacts f, latches open the contacts j and de-energizes the starting contactor c, d.
Patent GB-1360315-A (GB)
Title: Compositions for use in the manufacture of phosgene and their  preparation and use
IPC: C07F9/02
Filed: 1972-07-04
Abstract: 1360315 Oxychlorination catalysts RHONEPROGIL 4 July 1972 [5 July 1971] 31193/72 Heading B1E [Also in Division C1] Catalyst compositions comprise copper chloride or a compound convertible to CuCl 2  under oxychlorination conditions and KCl or a compound convertible thereto under oxychlorination conditions supported on a carrier consisting of silica gel of surface area less than 10m<SP>2</SP>/g and pore volume 0.3-1 cm<SP>3</SP>/g. The compositions may also comprise one or more rare earth metal chlorides, the content of copper and the total content of rare earth metals in the composition being from 10-20 wt. % and 0-4 wt. % respectively when the copper is present in the cupric state, and the atomic ratio K/Cu is 0.2-0.4.
Patent GB-1430249-A (GB)
Title: Releasable fastening devices
IPC: E05B65/19
Filed: 1973-06-29
Abstract: 1430249 Latches WILMOT-BREEDEN Ltd 26 Sept 1974 [29 June 1973] 31213/73 Heading E2A A rotary latch bolt 5 for fastening a vehicle boot lid has fastening projections 9 which enter through slots 22 on aperture 21 in a panel 20 and then rotate under torsion from spring 11. The bolt is carried in a mounting 2 whose tubular lower end 4 also passes through the hole 21 in the panel, rotation of the bolt through about 45‹ to the fastening position being permitted by part-circumferential slots 10 through which the projections 9 pass. The bolt is held in Its releasing position, Fig. 1, before entry, by a shroud 13 having axial slots 18 restraining the projections 9 against rotation. When the lid is closed, this shroud abuts the panel 20 and is forced up against spring pressure to permit rotation of the projections under the panel. A lock-operated mechanism (not shown) acting on element 12 can rotate the bolt back to its releasing position.