baber/WOPTO huggingface dataset:
Patent GB-541981-A (GB)
Title: Improvements in two-way transmission systems
IPC: H04B3/20
Filed: 1940-07-31
Abstract: 541,981. Loud-speaker substations. ASSOCIATED ELECTRIC LABORATORIES, Inc. July 31, 1939. No. 12372. Convention date, Aug. 14, 1939. [Class 40 (iv)] Side tone and howling are prevented, although breaking in is permitted, by an arrangement in which each path includes a potential-divider at least one part of which is shunted by a variable impedance device controlled by signal currents so that the efficiency of the speaking path is increased and that of the silent path is reduced. As shown, each path includes a potential divider 112a, 112b and 131a, 131b, the lower part of that in the receiving path and the upper part of that in the sending path being shunted respectively by tubes 152, 151 which are reduced in impedance, in response to speech reaching microphone 10, with the aid of a rectifier 146 and D.C. amplifier 149. A similar pair of tubes at 142 is controlled by received currents and acts on the upper part of the potential-divider in the receiving path and the lower part of that in the sending path. In normal conditions both paths are operative speech in either path raising the efficiency of one and reducing that of the other to prevent singing and side tone while allowing breaking in. In a modification, Fig. 2 (not shown), the tubes of a pair of shunting tubes are controlled in opposite directions and an automatic volume controlling arrangement in the form of a rectifier, which comes into action at a pre-determined level and produces a voltage in opposition to that controlling the shunting tubes, is provided. Attenuation networks are inserted to guard against any action on the control circuits of currents reaching the sending path from the line and of currents generated in the receiving path by the loud-speaker (acting as a transmitter). In another arrangement, Fig. 3 (not shown), one of the shunting valves is coupled to the potential divider by a transformer.
Patent GB-1323859-A (GB)
Title: Reciprocating piston compressor driven by a linear electric motor
IPC: F04B39/00
Filed: 1972-03-16
Abstract: 1323859 Reciprocating gas compressors ATLAS COPCO A B 16 March 1972 [17 March 1971] 12411/72 Heading F1N An electric driven reciprocating compressor has a piston or diaphragm reciprocating assembly comprising a pumping piston 10, an armature 6 and a non-pumping auxiliary piston or diaphragm piston 11, the pumping piston 10 being driven on its suction stroke by the attraction of the armature 6 towards a coil assembly 4 fed with a pulsed electric supply and on its compression stroke by gas in an auxiliary cylinder 20 acting on the piston 11, Gas is supplied to the auxiliary cylinder 20 from the pumping cylinder 14. The supply is either directly from the cylinder through a passage 31 containing a non-return valve 33 or from a line connected downstream of the delivery valve 16, the line containing a non-return valve (22) or being uncovered by the auxiliary piston 11 when the pumping piston is near the end of the compression stroke. A spring-loaded piston 34 or a spring (39) positions the armature displaced from the coil assembly prior to starting. The pulsed electric supply is produced by feeding A.C. through a half-wave rectifier. Gas enters the pumping cylinder'through an automatic valve 15 or ports (36) uncovered by the piston 10.
Patent GB-763005-A (GB)
Title: A new or improved plough frame and ploughs embodying such frames
IPC: A01B15/02
Filed: 1954-04-29
Abstract: 763,005. Agricultural implements. TAKAKITA, S. April 29, 1954, No. 12476/54. Class 6(1).  A hollow plough frame 3 is so shaped that it extends upwardly in a direction towards the rear of the frame and then extends forwardly at an angle to the upwardly extending portion. As shown a towing bar 7 is pivotally attached to the frame and may be adjusted by means of nuts 10. A guiding handle 11 is provided. The frame may be elliptical, rectangular or triangular in cross section. Guiding handles 11 are provided.
Patent GB-692287-A (GB)
Title: Improvements in cylinder and piston units, in particular for internal combustion engines
IPC: F02F3/10
Filed: 1951-05-28
Abstract: 692,287. Pistons: cylinders. BERNARDMOTEURS. May 28, 1951 [June 7, 1950], No. 12493/51. Class 122(i) A cylinder and piston unit comprises a cylinder of light metal such as aluminium and a piston made of ferrous metal, at least the rubbing portion of which'contains sulphur dissolved in its superficial layer. The sulphur may be dissolved in the layer by the method set forth in Specification 640,536, [Group II].
Patent GB-1000235-A (GB)
Title: Heat exchange roll
IPC: D21F5/02
Filed: 1964-03-25
Abstract: 1,000,235. Hollow rollers. MARSHALL & WILLIAMS CORPORATION. March 25, 1964 [Dec. 16, 1963], No. 12517/64. Heading F2U. A hollow cylindrical roller is heated or cooled by fluid flowing through annular spaces 102, 105 between an outer shell 12 and guide cylinders 34, 38 and the surface temperature of the roller may be adjusted by a manually operable valve 90 which controls the flow of fluid to the spaces. The outer shell 12 and guide cylinders 34, 38 are fixed to an inner cylinder 14 fast with journals 42, 52. The heating or cooling fluid flows through an inlet tube 87, distributers 63, 63A and two series of holes 26, 28 to the spaces 102, 105 and is returned through another series of holes 27 to a chamber 9 from which it leaves the roller through a duct 53 coaxial with the inlet. The flow through the distributer 63 is controlled by the valve 90 which is screwed into or out of the distributer inlet 67 by manual rotation of a rod 93 fast with the valve seat 90.
Patent GB-771121-A (GB)
Title: Treatment of articles composed of polyvinyl compositions
Inventor: EVANS THOMAS RALPH
IPC: D06N3/08
Filed: 1954-04-29
Abstract: To prevent subsequent plasticizer migration an article, e.g flooring or extruded tubing, composed at least in part of a polyvinyl composition is treated by applying an adhesive for the polyvinyl composition and nylon comprising a solution of an organic di-isocyanate to the polyvinyl composition surface, applying a solution of a soluble nylon on top of the adhesive and allowing the solvent to evaporate.  Soluble nylon is that soluble in lower aliphatic alcohols and the preferred nylon is one in which some of the amino hydrogens have been replaced by hydroxy methyl groups e.g. prepared by treating polyhexamethylene adipamide with formaldehyde, and may be in solution in a mixture of water and ethanol or n-propanol.  The polyvinyl composition may be plasticized polyvinyl chloride sheet or polyvinyl chloride coated fabric.  An additional layer of a different substance, e.g. rubber composition which may be vulcanized before or after application, asphalt, bitumen, oils and/or organic substances soluble in oils, may be adhered to the nylon layer, which layer is first coated with an adhesive for the different substance and for nylon.  In examples:- (1) a polyvinyl chloride leathercloth is coated with a toluene solution of diphenyl methane diisocyanate and then soluble nylon in a propanol-water mixture is applied; (2) a polyvinyl chloride sheet is coated as in (1), then a diisocyanate-rubber mixture adhesive solution is applied to the nylon coating, and a vulcanized rubber backing, coated with rubber solution, adhered thereto; (3) as in (2) but the rubber is unvulcanized, is without a rubber solution coating, and is vulcanized subsequently.
Patent GB-240388-A (GB)
Title: Improvements in and relating to lockstitch sewing machines
IPC: D05B57/14
Filed: 1925-05-14
Abstract: 240,388. Nasmith, J. W. May 14, 1925. Sewing-machines; lockslitching by hooks; feed by dog.-A rotary hook 26 is driven with variable speed by means of a lever 21 which is slidingly pivoted at 28 and is oscillated by a crank 20 on a shaft 16 geared to the top shaft 13. A radial arm 23 on the hook spindle 25 slidingly engages a slotted disc 22 pivoted to the end of the lever 21. A feed-bar 34 is fixed to a shaft 33 journaled in arms on a shaft 30. The shaft 33 is rocked to raise and lower the feed-bar by an arm 44 which bears on a face-cam 19 on the shaft. 16 and is held in contact therewith by a spring-pressed pin 47 contacting with the underside of the base-plate 10. The shaft 30 is rocked to give the feed motion by an eccentric rod 38, carrying a slide-block 39 which engages in non- parallel grooves in a fixed bracket 41 and an arm 43 on the shaft 30. The bracket 41 may be adjustable to vary or reverse the feed.
Patent GB-857849-A (GB)
Title: Additives for electroplating baths
IPC: C25D3/10
Filed: 1959-04-14
Abstract: 857,849. Electro-plating baths. DEHYDAG DEUTSCHE HYDRIERWERKE G.m.b,H. April 14, 1959 [April 24, 1958], No. 12561/58. Class 41 Electro-plating acid baths for deposition of metal contain a wetting agent, added to prevent pore formation on the plated surface, and consisting of an acid alkyl or aralkyl phosphoric acid ester, in which the alkyl group contains at least C atoms e.g. acid phosphoric acid esters of alkyl polyglycol ethers of formula: Cn H 2n+  1 O(CH 2 CH 2 O) m CH 2 CH 2 OPO 3 X, where n is 8 to 20, m is up to 50, and X is hydrogen, or a base. The acid mono- or diphosphoric acid esters of octyl alcohols and hexylphenol or higher homologues are also specified. Baths may contain Cu, Ni, Cr, Zn, Cd, Sn, Au, Ag, or alloys as plating metals.
Patent GB-1429413-A (GB)
Title: Underwater excavating equipment for a vessel
IPC: E02F3/92
Filed: 1974-03-21
Abstract: 1429413 Dredgers BILLITON RESEARCH BV 21 March 1974 [23 March 1973] 12580/74 Heading E1F Underwater excavating equipment for association with a vessel 1 comprises a main arm 6 adapted for pivotal attachment with the vessel 1 and to be supported therefrom to its other end by cable means 8, an auxiliary arm 4 pivotally attached to the arm 6 at said other end thereof, and adapted to carry excavating means 3, e.g. a bucket wheel, and mechanism 10 mounted between the arms for pivoting the arm 4 relative to the arm 6, the mechanism 10 being such that it can be operated from the vessel to enable the operational depth of the excavating means to be adjusted when the equipment is in use. Preferably the pivotal connection between the arms is so located along the arm 4 that the arm 4 excavating means 3 and suction equipment mounted on the arm are in balance about said connection 5. The mechanism 10 is a piston-cylinder unit preferably controlled by signals representative of the vertical movement of the vessel. Specifications 1359828 and 1359829 are referred to.
Patent GB-1117372-A (GB)
Title: Improvements in and relating to lifting devices for compressor valves
IPC: F04B49/24
Filed: 1966-03-22
Abstract: 1,117,372. Regulating compressors. HOERBIGER VENTILWERKE A.G. March 22, 1966 [March 24, 1965], No.12581/66. Heading F1N. In an infinitely variable delivery volume control for piston compressors acting by retarding the closing of the automatic suction valve 6 by varying the force holding the valve open by means of a plurality of lifting pins 12 loaded by springs 14 bearing against a movable pressure plate 15, the lifting pins 12 are provided with detachable weights 23, 24 for the purpose of varying the effective masses of the pins to suit the operating conditions of the compressor. The pressure plate 15 has a bush 17 slidable on a guide 18 and is urged towards the valve 6 against the action of a return spring 21 by a pushrod 19 operated by a hydraulic or pneumatic cylinder. The detachable weights may be in the form of rings or sleeves having bores provided with inwardly directed collars on which the caps 13 of the pins 12 seat. In an alternative arrangement the pins pass through clearance holes in the pressure plate 15 and carry the rings above the pressure plate with or without the interposition of an elastic damping element such as a cup spring or rubber washer.
Patent GB-180660-A (GB)
Title: Improvements in suspension devices for the water chambers arranged against the inner face of the cylinder covers of internal combustion engines
IPC: F02F1/36
Filed: 1922-05-04
Abstract: 180,660. Krupp Akt.-Ges. Germaniawerft, F. May 24, 1921, [Convention date]. Cylinders, cooling.-A water-chamber C, for protecting the cylinder cover B, is suspended therefrom so as to allow free expansion by lugs c with flanged heads c<2> which slide laterally into grooves in the heads of bolts D secured to the cover.
Patent GB-945326-A (GB)
Title: Improvements in doctors for paper making machines
IPC: D21G3/02
Filed: 1961-04-07
Abstract: 945,326. Doctors for paper-making machines. H. E. B. SCOTT. March 13, 1962 [April 7, 1961], No. 12603/61. Heading D2A. The doctor comprises a doctor blade 10 carried by a support 13, a pressure plate 11 bearing on the doctor blade 10, a suction chamber 14 extending along the support 13, spaced suction nozzles 15 extending from the suction chamber 14 and terminating in suction orifices 19 adjacent the tip of the doctor blade 10 at the side thereof remote from the roll 25 to provide a uniform airflow across the length of the doctor, and a deflector plate 18 extending over the nozzles 15 and down to the pressure plate 11 for guiding broken paper wet away from the doctor blade and preventing it from bunching-up around the suction nozzles 15, the deflector plate 18 having openings opposite the suction orifice and constituting one wall of a closed chamber 17 that surrounds the suction nozzles.
Patent GB-185456-A (GB)
Title: A flexible wheel and tyre for motors and other vehicles
IPC: B60B9/12
Filed: 1921-05-03
Abstract: 185,456. Fleetwood, C. J. May 3, 1921. Spring wheels.-A spring wheel consists of a segmental channel rim A connected to an annular member B by bolts C passing through segmental or continuous rubber cushions b<1>, b<2>, b<3>. A segmental wooden part a<2> and rubber tyre A<1> are carried by rubber cushions a<1> in the rim A. Slide discs E, F are used to guide the rim and are secured together and to the hub by bolts e, f, g passing through Ranges G. The bolts e, f are placed alternately inside and outside the ring B. The bolts f may be extended to carry brackets to support an auxiliary wheel.
Patent GB-257001-A (GB)
Title: Improvements in or relating to synchronous telegraph systems
IPC: H04L7/00
Filed: 1925-05-14
Abstract: 257,001. Muirhead &. Co., Ltd., Muirhead, F. H., Heurtley, E. S., and Foll, J. V. May 14, 1925. Synchronous movements. - In a system in which retransmitting or recording apparatus is maintained in synchronism by the received signals, the correcting coil is short-circuited during the intermittent closing of its series circuit except when a correcting impulse is required, the series and shunt circuits being under the. joint control of synchronized contact mechanism and of mechanism actuated by the received signals. In one arrangement, Fig. 1, (Comp.), the series circuit D<1> of the correcting coil C is closed intermittently by a contact lever B operated by a cam on a synchronized shaft, and the shunt circuit D<2> is closed except when the tongue f of a relay F is momentarily operated in response to a received signal. In a modification, Fig. 2, the shunt circuit is closed by the tongue f of a relay F<1> moved in opposite directions by the energizing of the dot and dash coils f<6> by the received signals, the tongue being held against either of its contacts f<7> by a biasing device f<8>. The Provisional Specification describes also an arrangement, Fig. 1, (Prov.), in which the coil C is in a circuit including in series the contact intermittently closed by the lever B and a contact closed at f<3> by the tongue f of a relay F whenever this relay is energized. The coil of relay F is in series with a battery g', a condenser g, and the tongue e and one contact e<2> of the relay E which receives the signals, the other contact e<1> being connected to the side of the condenser remote from the tongue e. The relay F is thus energized momentarily during the charging of the condenser when the tongue e makes contact at e<2>, and the condenser is subsequently discharged through the contact e<1>.
Patent GB-781965-A (GB)
Title: Improvements in vehicle driving gear
Inventor: SWENSON WILLIAM EUGENE
IPC: F16H3/08
Filed: 1953-05-06
Abstract: 781,965. Vehicle driving gear. MINNEAPOLIS-MOLINE CO. May 6. 1953 No. 12630/53. Classes 79(2) and 79(5) [Also in Groups XXIV and XXXIV] In a vehicle a change speed gear input shaft 18 is coaxial with and connectible with an engine operated shaft 39 through a two speed clutch assembly 68, and the shaft 39 is connected with a power takeoff shaft 59 through gearing 57, 58 by-passing the assembly 68, which comprises a planetary gear cage 67 rotatably mounting two fixedly interconnected planet gears 71, 76 of different diameter, the gears meshing respectively with sun gears 70, 77 on the shafts 39, 18, the cage 67 being normally connected by a clutch 81 with the shaft 18 and provided with a band brake 100 for holding the cage against rotation when the clutch is released, whereby the planet and sun gears rotate in unison and transmit torque without speed change when the clutch is operative and the torque is transmitted between the sun gears with speed change determined by the planet gears when the clutch is released. As shown the engine flywheel 38 drives through a clutch 44 to the shaft 39. The gear 57 on the shaft 39 meshes with a gear 61 and the gear 58. The power take-off shaft 59 extends through the countershaft 22 of a main change speed gear. The gear 61 is carried by a shaft 62 bevel gear connected with a transversely extending belt pulley shaft 65. The band brake (see Group XXXIV) and the clutch 81 (see Group XXIV) are under the conjoint control of a pedal 93, lost motion being provided in the connection between the brake and pedal whereby the pedal can be operated to disconnect the shaft 39 from the main change speed gear so that the latter gear can be controlled without effecting the drive of the power take-off shafts 59, 65. The pedal 93 is provided with teeth 98 which can be engaged by a pawl 97 operated by a toe latch 95 so that the pedal can be locked in either of its clutch disengaged and engaged. positions. Specification 746,597 is referred to.
Patent GB-568274-A (GB)
Title: Improvements in or relating to photographic enlarging apparatus
IPC: G03B27/36
Filed: 1943-08-05
Abstract: 568,274. Photographic enlarging apparatus: ROGERS, G. H. Aug. 5, 1943, No. 12659. [Class 98 (i)] In photographic enlarging apparatus for use with lenses of different focal lengths in which the projector head and the paper holder are relatively movable and in which means operated or controlled by the movement automatically adjust the focusing devices of the projector to maintain any of the lenses at its correct focus for any setting of the enlarger, the projector head is movable along a support and carries a pinion rolling on a rack fixed to the support as the head moves along the support, a cam being rotatable by the pinion and engaging a cam follower mounted on a lever connected by links to the focusing device of the projector lens and the cam having a contour adapted to maintain the lens in focus throughout the range of movement of the projector and being replaceable by appropriate cams for the other lenses of the set. The means for adjusting the focus may comprise a member (e.g. a cam) coupled or geared to the moving part of the enlarger and connected to the lens mount by levers, links, or the like, adapted to move the lens. As shown, the projector head has horizontal supports 6 provided with guides so that the head may be moved manually up or down the vertical cylindrical column 7 against a counterweight attached to a chain passing over sprockets or pulleys at the top of the column. The counterweight moves between guide rails also serving to guide the supports 6. The head is moved by a hand wheel 12 operating a pinion engaging a rack fixed to the column or operating a sprocket wheel 16 engaging a taut chain 15. Levers 17 pivoted near the column are pivoted to links 18, the free ends of which are joined by a crossbar 19 coupled by a screw 34 to the lens board 20. The levers 17 are connected by a bridge 21 carrying a cam follwer 22 engaging a cam 23 on a shaft 24 geared to the hand wheel shaft in such manner that the cam makes one revolution during the traverse of the head from the minimum to the maximum enlarging positions. The gear shaft 26 carries a sprocket 37 engaging the chain 15. Movement of the head moves the lens board on the guides 28 to maintain correct focus. A set of cams is provided, one for each lens, and the appropriate cam is mounted on shaft 24, located by a key, and is fixed by a thumb nut 29. The set of cams may alternatively be fixed on a common hub and the roller 22 shifted. The position of the cross-bar 19 is adjustable along links 18 into holes 30 to avoid the use of very large diameter cams for very short focus lenses. The column may swing round to permit the lens to focus on the floor, manual focusing being effected by screw 34, an indicator 35 being provided to permit re-setting for automatic focusing. The manual focusing permits of obtaining out-of-focus effects and also for correcting for the thickness of the negative. A bracket may be provided on the lens board to take an exposure meter.
Patent GB-686372-A (GB)
Title: Improvements in or relating to a device for drilling rocks, stone and the like
IPC: B23B51/04
Filed: 1948-05-08
Abstract: 686,372. Stone cutting. SONAPAR SOC. DE PARTICIPATION, SOC. ANON. May 8, 1948 [May 12, 1947], No. 12715/48. Class 124. [Also in Group XXII] A vase-like container 13 is drilled from stone, rock or the like (see Group XXII) by concentric annular cutters l, l<SP>1</SP> and separated from the main body of the material by shearing along the surfaces indicated in broken lines.
Patent GB-1491392-A (GB)
Title: Method for detection of thrombosis and prethrombosis
IPC: C12Q1/56
Filed: 1976-03-30
Abstract: 1491392 Serum coagulability tests' I INNERFIELD 30 March 1976 [2 May 1975 24 Oct 1975] 12723/76 Heading G1B Serum coagulability is measured by a method comprising adding heparin in different amount to aliquots of the test serum, adding each of the resultant heparin-serum solutions to a separate tube containing thrombin solution, incubating a portion of each of the solutions so obtained and adding to each normal plasma, and if clotting occurs measuring the clotting time, the method being carried out under standardized conditions, the results obtained being compared with results for serum from healthy unmedicated individuals and from known thrombotic individuals. The thrombin and plasma may be solid preparations reconstituted with isotonic saline and distilled water respectively. The formation of a clot may be detected either visually or using a light source - photo-cell arrangement.
Patent GB-210008-A (GB)
Title: Improvements in and relating to oil lamps for vehicles
IPC: F21S13/00
Filed: 1923-05-12
Abstract: 210,008. Hanmer, F. May 12, 1923. Cycle lamps.-Relates to cycle and like lamps of the type in which an oil reservoir carrying the burner is hinged or otherwise detachably secured to a cylindrical body provided with air-admitting apertures near the lower edge, and consists in forming an inwardly projecting flange h on the body c immediately above the apertures g which flange in conjunction with an upstanding portion j provided on the reservoir a prevents air admitted through the apertures g from impinging directly on the flame. In the case of lamps burning paraffin, apertures m, l are also provided in the top and side walls of the upstanding portion j.