baber/WOPTO huggingface dataset:
Patent GB-417494-A (GB)
Title: Improvements in and relating to flat knitting machines
IPC: D04B11/22
Filed: 1933-12-27
Abstract: 417,494. Knitting machines. LIEBERKNECHT, K. R., and LIEBERKNECHT GES., K., Oberlungwitz, Germany. Dec. 27, 1933, No. 36384. [Class 74 (ii).] A flat knitting-machine is provided with means whereby each needle can be automatically or selectively acted on to produce patterns by pressing or mis-pressing. The narrowing levers 15 are extended or extensions 16<a> are attached thereto to carry a pattern drum 10 which acts directly on a series of levers 12. Brackets 3 on the extensions 16<a> carry a bar 5 and a shaft 5<a> on which the levers 12 rock when acted on by the drum 10. The lower ends 13 of the levers can thus bear on bevelled instruments 6 carried by the bar 5 and these points act selectively on individual needles 7 to hold them away from the presser. The narrowing mechanism is caused to dip to bring the device into action, by sliding a cam roller 21 on to a special cam 20 on the main shaft, as required. The dipping and the pattern drum operating mechanism are shifted into and out of operation simultaneously by a pattern chain.
Patent GB-431061-A (GB)
Title: Improvements in or relating to thermionic valves
IPC: H01J19/02
Filed: 1933-12-29
Abstract: 431,061. Thermionic valves. WARREN, S. F., 27, Lowick Road, Harrow, Middlesex. Dec. 29, 1933, No. 36635. [Class 39 (i)] A valve has a cathode 3, a control grid 4, a screening grid 5, an anode 6, an external screening grid 7 connected with the inner screening grid 5, which does not extend appreciably beyond the control grid and anode, and one or more end screening members 9, which are insulated from the screening grid: and are adapted tc screen lines of force which would otherwise extend beyond the control grid and anode around one or both ends of the inner screening grid. The end member 9 consists of a metal disc secured by clips to a mica disc 8 ; it is of smaller diameter than the external screening grid and has a central aperture allowing clearance for the support wires of the screening grid 5. The member 9 is connected with a point preferably of low potential such as the cathode or earth, and the connection may be made within the valve. At the lower end of the electrodes a tubular member 11 supports a mica disc spacing the electrodes 3, 4, 5 and is connected by one or more wires 13 with the member 9 and the cathode. The member 11 may be replaced by a disc similar to 9 but provided with an aperture through which the anode lead passes. The lead to the control grid is taken to a terminal on the top of the envelope. A suppressor grid may be mounted between the screening grid and the anode. Specifications 230,011, 280,851, 292,563, [all in Class 39 (i)], and 377,692 are referred to.
Patent GB-411199-A (GB)
Title: Improvements in evaporative cooling systems for internal combustion engines particularly for aircraft
IPC: F01P3/22
Filed: 1932-12-28
Abstract: 411,199. Cooling cylinders. ELLOR, J. E., Grandell, South Drive, Chain Lane, Mickleover, Derby. Dec. 28, 1932, No. 36675. [Class 7 (ii).] The liquid level in the hotwell c<1> of the aircooled condenser b of an evaporative cooling system is maintained constant by a float valve g which controls the admission of relatively cool liquid from a box e. The box communicates through orifices f with the spaces d<4>, Fig. 4, of radiators d disposed on opposite sides of the hotwell and having spaces d<3> to which the liquid is supplied through the branches d<2> of a pipe d<1> connected to the liquid tank a<1> of the engine cooling system. The mixed liquid and vapour flow into the tank and the liquid is returned to the engine by a pump a<3>, while the vapour passes through the pipe b<2> to the sections of the condenser from which the condensate flows through a slot c into the hotwell and is returned to the engine by a pump c<3>. The slot c is of such a size that it is always sealed with condensate to prevent the passage of uncondensed vapour into the hotwell which is provided with a discharge duct containing a removable filter j<2>.
Patent GB-338020-A (GB)
Title: Improvements in or relating to sound boxes, pick up devices and the like for gramophones or like instruments
IPC: G11B3/46
Filed: 1929-12-02
Abstract: 338,020. Bailey, W. C., and Keefe, J. Dec. 2,1929. Securing tools to tool-arms.- A tube c of wood, vulcanized fibre, ebonite, celluloid, or like non-metallic and slightly resilient material is rigidly fitted within the usual needle-carrying socket a of a gramophone stylusarm b and is engaged by a transverse screw y which is adapted to clamp the metallic needle x in the tube c. The bore of the tube c is enlarged at its upper end to accommodate any burr x<1> at the upper end of the needle x. The bore for accommodating the needle may be drilled after plugging the bore of the socket a with wood &c., or the tube c may be moulded in position from plastic wood, collodion with or without an inert filling material, celluloid &c. The tube c may be split longitudinally if desired, and the bore need not be concentric with the bore of the socket.
Patent GB-1236652-A (GB)
Title: Photothyristors
IPC: H01L31/111
Filed: 1968-08-01
Abstract: 1,236,652. Photothyristors. SIEMENS A.G. 1 Aug., 1968 [5 Aug., 1967], No. 36862/68. Heading H1K. In a PNPN thyristor one of the outer zones is smaller than the adjacent inner zone to leave an area of the latter exposed. A transparent region 1-5 Á thick of the same conductivity type as the outer zone is disposed on this area. The P zones 2, 3 of a typical device, Fig. 1, are formed by diffusion or pyrolytic deposition on N-type silicon base 1 and the resulting body attached by aluminium foil 4 to molybdenum plate 6. The transparent region 8 is pyrolytically deposited or formed by alloying in a goldantimony foil and then etching in hydrogen fluoride vapour. Crescent-shaped electrode 9 and associated region 10 which partially enclose region 8 are formed by alloying in a similar foil. In an alternative construction electrode 9 is an annulus surrounding region 8. In a further embodiment in which regions 8 and 10 abut, they are formed by alloying a first foil to the site of the combined regions and after etching to leave a transparent N region alloying a second foil to only part of the film to form electrode 9.
Patent GB-919266-A (GB)
Title: Remote control system
Inventor: TURRILL JOHN RAYMOND
IPC: B64C13/00
Filed: 1959-10-30
Abstract: 919,266. Electric correspondence control systems. ULTRA ELECTRONICS Ltd. Oct. 21, 1960 [Oct. 30, 1959], No. 36929/59. Class 40 (1). [Also in Group XXXIII] In remote control equipment having both an electrical linkage and a mechanical linkage between the controlling and controlled members L1 and L2, an electric motor M moves controlled member L2 through the intermediary of an element L4 forming part of the mechanical linkage and connected to the motor through a clutch arrangement which permits movement of element L4 and member L2 when a displacement of member L1 exceeds by a predetermined minimum the displacement as transmitted through the electrical linkage. Synchros S1, S2 send signals indicative of the positions of levers L1, L2 to control amplifier CA which compares the signals and, if a difference exists, energizes motor M to drive through members D, L4 forming a clutch, the lever L2. If lever L1 is moved more quickly than lever L4 under electrical control, or if the electrical linkage breaks down, lever L1 will engage stop a or stop b on lever L4 and, in a manner not shown, will disengage clutch members D, L4 so that member L4 will be free to move under the force exerted through stop a or stop b from lever L1.
Patent GB-370582-A (GB)
Abstract: 370,582. Mechanical make - and - break switches. IGRANIC ELECTRIC CO., Ltd., 147, Queen Victoria Street, London, and MACKLEY, A. H., 15, Waterloo Road, Bedford. Feb. 23, 1931, No. 5610. [Class 38 (v).] A time switch comprises a slowly rotating conducting cylinder 2 driven by a synchronous motor 6 and permanently engaged by a contact 3 and engaged during part only of a revolution by a contact 4, the cylinder being cut away at O round part of its periphery opposite the contact 4, and there being an additional contact 5 which the contact 4 engages when it is lifted by the counterclockwise rotation of the cylinder 2. A circuit is then completed from a line Ll through contact 3, cylinder 2, contact 4, contact 5 to the coil 1b of a relay and back to line L<2>. The relay is energized and closes a main circuit at 1a and a circuit at 1c which shunts the contacts 4, 5. When the contact 4 at a later time slowly falls into the gap O and leaves the contact 5 the circuit through the coil 1b is still maintained until the contact 4 becomes disengaged from the cylinder. This arrangement prevents chattering of the contacts. Fig. 2 shows a modification in which the cylinder 2 has tapering portions, and the contact 4 is adjustable axially so as to vary the relative periods of make and break. The contact 5 is not shown in this modification, but acts as in the Fig. 1 construction.
Patent GB-933887-A (GB)
Title: Rotary hook for sewing machines
IPC: D05B57/14
Filed: 1961-03-30
Abstract: 933,887. Sewing-machines. H. G. C FAIRWEATHER (Singer Manufacturing Co.). March 30, 1961, No. 37415/62. Divided out of 933,886. Class 112. In a horizontal axis rotary hook, adapted for sewing with very heavy thread, the stationary bobbin case carrier 13 is formed on its needle thread loop cast-off side with a radial loop-controlling flange 25, the edge of which is positioned closely adjacent the path of travel of the loop-taking beak 10 on the rotary body 7, flange 25 also extending for approximately 60 degrees beyond the loopseizing position on the cast-on side of the carrier 13. Flange 25 on the cast-on side is formed adjacent the loop-seizing position with a peripheral notch 40 to reduce the radius of its edge 38, its face is formed adjacent the loop-seizing position with a bobbin thread guiding slot 34a, and the edge 38 is bevelled as at 39 to assist the passage of the anchored needle thread limb TW on to the face of flange 25. The end portion of the latter on the cast-off side farthest from the loop-seizing position is bevelled as at 41 to facilitate the passage of the limb TW thereupon. The axis of the peripheral bearing rib 12 on the carrier 13 is positioned lower than the axis of the side wall of the latter to increase the gap between said side wall and the inner face of the rotary body 7 at the loop-seizing position, for providing additional clearance for the very heavy thread. The flange 25 is formed on the cast-off side adjacent the loop-seizing position with a peripheral notch 42 to facilitate the passage of the thread loop as it is being withdrawn from the hook.
Patent GB-906068-A (GB)
Title: Improvements in or relating to virtual-earth amplifiers
Inventor: HARRISON DONALD
IPC: G21C17/14
Filed: 1959-11-04
Abstract: 906,068. Measuring radiation. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Oct. 28, 1960 [Nov. 4, 1959], No. 37481/59. Class 40 (3). [Also in Groups XXXVI and XL (c)] A reaction period meter circuit comprises an amplifier which has a long time constant for small changes due to noise but a short timeconstant for larger changes due to changes in the reactor period. The reactor period meter shown comprises an ionization chamber 1, a logarithmic current amplifier 2, a differentiating amplifier 3 having a variable smoothing time constant circuit associated therewith and an output meter M. The circuit 3 comprises an amplifier 4 having a negative feed-back resistor R 2  to provide a " virtual earth " input so that together with an input capacitance C 1  the amplifier operates as a differentiating circuit. Noise in the input signal is removed by a smoothing circuit comprising R 1  and a capacitor C 2  in the feed-back circuit, in parallel with a much larger capacitor C 3  connected in series with a small resistor R 3 . When a change of input occurs the resulting change of potential at the left-hand plate of capacitor C 3  causes one or other of the silicon diodes D 1 , D 2  to conduct so as to effectively remove C 3  from the smoothing circuit. Accordingly the output of the amplifier will rapidly move to a new value but once there, will be subjected again to the long timeconstant circuit so that noise signals of low amplitude are eliminated. The diodes D 1  and D 2  are biased almost to the point of conduction by a battery B. Specification 748,415 is referred to.
Patent GB-815843-A (GB)
Title: Improvements in and relating to the treatment of polyesters
Filed: 1956-12-07
Abstract: The hydroxyl number of a polyester is reduced by reacting it with diketene.  The polyester may be one having a low acid number prepared by adding at the start of or during the polyesterification a small excess of the polyhydric alcohol. Reaction with diketene may be effected in presence of a solvent (e.g. benzene, toluene, xylene, chlorbenzene or alpha-methylnaphthalene) and/or a catalyst (e.g. sodium acetate, pyridine, dimethyl aniline, sulphuric acid or p-toluene sulphonic acid) and preferably in presence of an inert gas. In Example (1) a liquid polyester plasticizer was made more compatible with polyvinyl chloride by heating it with diketene.  In further examples, diketene was heated with polyesters prepared from (2) maleic anhydride, 1.6-hexanediol and 1.2.4-butanetriol; (3) succinic acid, tartaric acid and 1.6-hexanediol; (4) terephthalic acid and ethylene glycol; (5) succinic acid and hexanediol.
Patent GB-1445850-A (GB)
Title: Silicone fluid useful as a brake fluid
IPC: C08K5/00
Filed: 1973-08-08
Abstract: 1445850 Silicone hydraulic fluid compositions GENERAL ELECTRIC CO 8 Aug 1973 [18 Sept 1972] 37506/73 Heading C3T [Also in Division C5] An hydraulic fluid comprises (a) 40 to 99% by weight of a silicone of the formula where n is 1 to 2000 and R is hydrocarbyl, halohydrocarbyl or cyanoalkyl, and (b) 1 to 60% by weight of a water-tolerance additive which is a glycol, a glycol polyether, an aliphatic alcohol, a silane ester, a boron ester, a carboxylic acid anhydride, or a polysiloxane having ester or amine groups. The fluid may also contain: 1 to 20% by weight of a pourdepressant branched-chain silicone having a viscosity of 5 to 100 cS at 25‹ C.; 1 to 5% by weight of a rubber-swelling additive that is an ester of a monohydric alcohol and a mono- or di-carboxylic acid, with or without halogen substitution in either the alcohol or the acid; 0À05 to 2% by weight of an anticorrosion additive that is a zinc naphthenate or an N-alkyl-N- aryl-alpha-naphthylamine in which the alkyl substituent has 1 to 8 carbon atoms and the aryl substituent may be alkylaryl or haloaryl; 1 to 5% of an antioxidant that is a paraaminophenol or paraphenylendiamine in which each amine group is secondary or tertiary, the other groups bonded to N being hydrocarbyl or halohydrocarbyl; or 0À01 to 2% of an anti-corrosion additive that is a hydrogen-alkyl-polysiloxane in which the alkyl groups have from 1 to 8 carbon atoms. Examples of additives of each class are listed.
Patent GB-1446340-A (GB)
Title: Carrier frequency telecommunication  systems incorporating a  television transmission system
IPC: H04N7/081
Filed: 1973-08-08
Abstract: 1446340 Television transmission SIEMENS AG 8 Aug 1973 [11 Aug 1972] 37575/73 Heading H4M A television programme is transmitted over a carrier frequency telecommunication system together with two additional signals associated with the programme and the system by first forming the additional signals into respective primary groups, converting those groups into a second group at 312 to 552 kHz, converting that group to an intermediate position by modulation with a carrier of 6799 or 6324 kHz, combining the TV programme video signal with the intermediate signal and frequency converting the combination to occupy a position corresponding to two adjacent quaternary groups of the carrier frequency system.
Patent GB-823009-A (GB)
Title: Force-ratio measuring apparatus
IPC: G01P5/175
Filed: 1957-12-06
Abstract: 823,009. Electrical measuring systems. SPERRY RAND CORPORATION. Dec. 6, 1957 [Dec. 6, 1956], No. 37978/57. Class 40 (1). [Also in Group XIX] Force-ratio measuring apparatus comprises a lever 2, Fig. 2, forces F 1  and F 3  being applied at distances a and b respectively from the fulcrum 1 to produce opposite torques upon the lever, and the line of action of F 3  being displaced by an angle # from a line normal to the lever such that the lever is maintained in an equilibrium position in which # = # [F 1 /F 3 ]. Fig. 3 shows a Mach meter in which the lever 2 is acted on by two bellows 5, 9, in a sealed chamber 4. A pitot tube 21 puts the interior of chamber 4 at static pressure (P s ) and the interior of bellows 5 at total pressure (P t ) so that bellows 5 and bellows 9, which is evacuated, exert forces representing P t -P s , and P s , respectively. Deflections of the lever 2 are communicated to an inductive pick-off 17, the output of which energizes a potentiometer 18. The wiper 19 of potentiometer 18 is positioned in accordance with the expansion of a third bellows 30 respontive to P t -P s  to compensate the effects of altitude variations, the potentiometer output being amplified at 20 and fed to a servomotor 15 which drives a shaft 12 to rotate bellows 9 until the beam is restored to its null position. Motor 13 also controls a pointer 27 associated with a scale 26 which may be calibrated to read a Mach number direct, and a potentiometer 29 which may be shaped to produce a potential which is a direct measure of Mach number. In an alternative method of compensating altitude variations, bellows 30 operates a pick-off whose output is used to bias one of the valves in amplifier 20, which is then supplied directly from pick-off 17.
Patent GB-303508-A (GB)
Title: A machine for waxing, polishing, painting, staining and similarly treating surfaces
IPC: A47L13/32
Filed: 1928-12-27
Abstract: 303,508. Woods, (nÚe Morgan), J. E. Jan. 6, 1928, [Convention date]. Floors, cleaning, waxing, and polishing. - A machine for polishing, waxing, or similarly treating floors comprises brushes or other polishing elements rotated in opposite directions by a motor, liquid finishing-material being supplied from a reservoir through channels leading to the elements, and oscillatable means engaged intermittently by means movable with the shafts of the brushes or other elements whereby the liquid is positively ejected from the machine. In the construction shown in Figs. 1 and 3, two annular brushes 41 are detachably secured to shafts 27 which are rotated, through worm gearing, by an electric motor. The shafts 27 are mounted in a frame which is provided with two vertical chambers 67 communicating by apertures 65 with a reservoir 56 containing waxing or other surfacetreating liquid. The reservoir is provided with an electric heating element 63 and a thermostat 64 for regulating the temperature of the liquid. Within each chamber 67 there projects a rod 72 provided at the bottom with an enlarged head 78 and at the top with a cam surface 76. A member 45 carried by the shaft 27 is provided with a cam surface 47 whereby on rotation of the shaft the cam surfaces 76, 47 are engaged so that the rod 72 is pressed downwardly against the action of a spring 75 and liquid in the chamber 67 is forced out through an aperture 70. The flow of liquid may be reduced or stopped by means of a set screw 82 adapted to engage the top of the earn surface 76. In a modification, the oscillatable rod is normally held downwards by a spring, and is given reciprocating movement by the engagement of a pointed end on the bottom of the rod with a cam surface on a member secured to the brush element. The brush may be connected to the shaft 27 through the medium of a plate 120, Fig. 13, secured to the upper surface of the brush stock, the plate being provided with an internally-threaded flange 122 and with a spring 126 adapted to bear against the base of the shaft 27. A shoulder 123 on the flange bears against a pin on the shaft when the flange has been screwed home. The pin and shoulder may be dispensed with, by the formation of a shouldered recess in the base of the shaft 27 for engagement with the end of the spring 126. The brush may be replaced by a polishing element shown in Fig. 15. A plate 135 adapted for attachment to the driving shaft is provided with an annular felt pad 139 to which is attached by a screw 141 a disc 140 of cloth or other flexible material. The upper surface of the disc has an annular sheet of sandpaper 142 engaging the, felt 139, and to the lower surface is secured a sheet 143 of polishing material.
Patent GB-950774-A (GB)
Title: The production of cerium (iv) molybdate, tungstate and vanadate
IPC: C01F17/235
Filed: 1961-10-25
Abstract: Cerium IV molybdate, tungstate or vanadate are produced by precipitation from a solution containing tetra valent cerium in an acid medium preferably nitric acid and sodium or ammonium molybdate, tungstate or vanadate respectively. During or immediately after precipitation the pH is adjusted to 1.0-1.6, 0.8 or 1.2 for the production of cerium molybdate, tungstate or vanadate respectively.
Patent GB-347238-A (GB)
Title: A method for the heat treatment of metals
IPC: H05B3/60
Filed: 1929-12-16
Abstract: 347,238. Heat treatment of metals. BELLIS, A. E., Branford, Connecticut, U.S.A. Dec. 16, 1929, No. 38518. Convention date, Dec. 14, 1928. [Class 72.] A salt bath for heat treating metals is contained in a metal pot 5 and is heated by means of a low voltage current passed through the salt between one or more electrodes 8 immersed therein and the wall of the container. The salt is initially rendered fluid by means of an arc or by igniting a compound thereon known under the Registered Trade Mark " Thermit." The pot and electrode may be of steel or chrome iron. Some heat is generated by disintegration of the electrode and pot. The articles to be treated may be removed from the bath when they cease to be magnetically attracted by the electrode. The bath may be used for hardening high speed tool steels at 1700- 2400‹ F.
Patent GB-1494074-A (GB)
Title: Internal combustion engine fuel supply systems
IPC: F02M3/02
Filed: 1974-11-14
Abstract: 1494074 Regulating I C engine fuel supply; spray carburetters C D E THOMPSON 14 Nov 1974 [15 Aug 1973] 38585/73 Headings F1B and F1H A normally closed solenoid fuel valve in the fuel system or a device normally obturating the breather hole of the carburetter float chamber is connected in series with a normally open switch connected to the engine battery, the switch being closed in response to operation of the engine accelerator or choke. The valve or device is also connected to the secondary contacts of a normally closed relay having its primary contacts in series with a rheostat and an engine driven generator. The rheostat is adjusted so that fuel valve or the breather hole is open below a desired engine r.p.m. e.g. 800,when the relay is de-energized. A switch responsive to engine torque or vacuum may be provided between the relay and generator to open on engine over-running. The relay secondary contacts are connected to the battery so that the valve is open when the relay is de-energized. A reed switch in the field of the valve solenoid may activate a delay circuit which cuts off the engine ignition three seconds after closure of the fuel valve. Manually operable switch means may be mounted on the vehicle facia to operate the solenoid valve to cut off the fuel and/or ignition. The fuel valve may be located in a fuel injection system.