baber/WOPTO huggingface dataset:
Patent GB-759665-A (GB)
Title: Automatic gain control system for semi-conductor devices
IPC: H03G1/00
Filed: 1954-10-29
Abstract: 759,665. Transistor amplifier gain control. RADIO CORPORATION OF AMERICA. Oct. 29, 1954 [Nov. 24, 1953], No. 31365/54. Class 40 (6). In an automatic gaincontrol for a transistor receiver, amplitude modulated waves are applied from a conductive input 67, Fig. 5, to the base 56 of a transistor and over an impedance 70 to the emitter, the impedance being by-passed at carrier frequency and an A.G.C. voltage being derived from one of the transistor electrodes for application to the emitter circuit of a controlled stage 98. The impedance is by-passed for carrier frequency by capacitors 72, 74 but only capacitor 74 is effective at audio frequency so that resistor 70 provides negative feed-back and reduces distortion in the audio signal fed out from the collector 54 to the audio amplifier 96. The A.G.C. voltage is fed out over a filter 64, 65 and iso-. lating networks to control the R.F. and first I.F. stages. An increase in carrier increases the emitter-collector current flow in transistor 48 so that current is reduced in the emitter collector paths of transistors 98, 118, thereby reducing the gain. These stages are stabilized by emitter bias resistors 136 so that any increase in emitter current in transistor 48 due to temperature tends to offset the corresponding increase which would take place in transistors 98, 118. In a modification, Fig. 4, a NPN transistor 78 is used as demodulator/A.G.C. transistor, the A.G.C. line then being connected to the collector in order to obtain the correct polarity, and audio signals being derived from terminals 60.
Patent GB-1134586-A (GB)
Title: Process for improving soil
IPC: C09K17/12
Filed: 1967-07-07
Abstract: 1,134,586. Treating soil. HENKEL & CIE G.m.b.H. 7 July, 1967 [15 July, 1966], No. 31406/67. Heading C1B. Soil is treated successively with alkaline and acid silica sols, the pH of the sols being 2-5 and 7À5-10 respectively and the resulting pH of the soil being 5-8. The sols may contain up to 6% of SiO 2 . 40-250 gm./m.<SP>2</SP> of SiO 2  may be added to the soil. The sols may be produced by adding phosphoric acid to sodium or potassium silicate solution and may be stabilized by urea or a humate. An ammonium fertilizer may be added to the treated soil.
Patent GB-1353934-A (GB)
Title: Camera flash bulb operating means
IPC: G03B15/04
Filed: 1971-07-05
Abstract: 1353934 Photographic cameras IMPERIAL CAMERA CORP 5 July 1971 [13 July 1970] 31409/71 Heading G2A In a photographic camera having a flash-lamp socket for a percussive flash unit, a flash-cube 24 as shown, and a push bar 70 which triggers the flash operation, the shutter is formed by at least two movable plates, the first plate being pivotally mounted on the camera housing and the second being pivotally mounted on the first, there being spring means connecting these two plates, so that, in operation, one of the plates engages the push bar 70 to trigger the flash in synchronism with shutter opening. As shown, Fig.2, depression of a shutter button rotates the first plate 32, the second plate 52 moving so that a finger 58 thereof slides along a retaining tab 60. The spring portion 46 is thereby tensioned. When the finger 58 slips off the tab 60, the spring 46 rotates the plate 52 to uncover lens aperture 18 while the finger 58 engages tab 90 of the bar 70 to operate the flash unit. In a second embodiment Fig. 7 the first and second plates are both pivotally connected to a post 104, the spring 108 ensuring that plate 102 is pivotally mounted relative to the plate 100. As before, the first plate 100 rotates on depression of a shutter button, a shoulder 122 engaging a tab 124 of the two part push bar assembly and raising the lather until it engages a ledge (131) Fig.8, (not shown) of the camera top surface. When an extension 114 of the second plate 102 slips off a tab 116, the plate 102 rotates to uncover the lens opening 141, while the extension 114 engages the tab 124 to raise part (130) of the bar assembly to operate the flash unit. In a third embodiment Fig.11, the second plate is formed as a hammer plate 158 pivoted on the first plate 150. When the hammer plate 158 slips off a tab 164, the spring 162 urges the plate 158 into engagement with a shutter closure plate 176 which is then opened. The first plate 150 engages the push bar 172 to operate as before. Alternatively, the push bar may be operated by the hammer plate 158.
Patent GB-1177662-A (GB)
Title: Improvements in or relating to the Damp-Proofing of Walls and Similar Structures.
Inventor: KYTE COLIN TREVOR
IPC: E04B1/64
Filed: 1967-07-07
Abstract: 1,177,662. Damp-proofing solution. GALLWEY CHEMICAL CO. Ltd. 19 June, 1968 [7 July, 1967], No. 31428/67. Heading C3T. [Also in Division D1] An aqueous damp-proofing solution contains by volume 16 7% of sodium silicate solution containing 30 wt. per cent 5i0 2  and 12-5% of a commercial siliconate containing 40 wt. per cent solids; a second solution contains 16% and 15% respectively of these solutions; acetic acid may be added to reduce gelling time; a plastics emulsion, e.g. of a styrene/acrylic copolymer may also be added.
Patent GB-505823-A (GB)
Title: Improvements in piston pumps
IPC: F04B53/12
Filed: 1938-10-31
Abstract: 505,823. Piston pumps. MEILLER, F. X., and MEILLER.,.J (trading as MEILLER F. X., [Firm of]). Oct. 31, 1938, No. 31445. [Class 102 (i)] In a piston pump in which .one or more hollow pistons g are each provided at one end with a hole t through which flows the fluid to be pumped, the pistons being actuated by eccentrics and also by compression springs o which operate them during the suction stroke by pressing against shoulders or abutments m formed on the interiors of the pistons, the springs press continuously against suction valves h located in the holes t but act on the pistons only during the suction stroke. The valves h have fluted stems, heads i which form the surfaces driven by the eccentrics, and ends n which project beyond the abutments m when the valves are closed. Flanged plates u, Fig. 4, attached to or integral with the springs o or valves h, may be provided to engage the shoulders m.
Patent GB-1005114-A (GB)
Title: Improvements in or relating to hydraulically-operated press brakes or guillotines
Inventor: SAVORY FREDERICK RALPH
IPC: B30B15/04
Filed: 1963-08-09
Abstract: 1,005,114. Guillotines; press brakes. STEEL CONSTRUCTION & ENGINEERING CO. (NOTTS) Ltd. Aug. 4, 1964 [Aug. 9, 1963], No. 31459/63. Headings B3E and B3W. A guillotine or press-brake of the type in which the movable tool holder is actuated directly by a pair of hydraulic rams, one at each end of the beam supporting the movable tool, is characterized in that the side frames each comprise an upright plate, a pair of plates flanking and secured to at least an upper portion of the upright plate and extending beyond one upright edge, the extensions being curved oppositely and secured together at their outer ends to form an upright cylindrical shell with open ends, a cylinder having an open end and an integral closed end secured in the said shell with the closed end uppermost, and a rigid projection extending from a lower portion of the upright plate beyond the same upright edge as that beyond which the flanking plates extend. The machine comprises side frames 10A, 10B, top and bottom beams 11 and 12, hydraulic cylinders 13A, 13B and a movable beam 15 having guides 16 vertically movable on slides 17. The fixed tool 19 is supported by a bolster 18 welded to the bottom beam 12. Each side frame comprises a plate 21 and flanking plates 22 with extensions 23 curved oppositely and welded at 25 to form a cylindrical shell 26. The rear and upper edges of the plates 22 are joined by a welded strip 30 and there are plug welds 31 between the plates 21 and 22. Each cylinder 48 has an integral end 49, an open end 50, and a flange 51 abutting the lower end 27 of the shell 26. The cylinder is retained by a flanged ring 52 bolted to the cylinder and resting on the end 26 of the cylindrical shell. The open end of the cylinder is closed by a bolted cap 54.
Patent GB-823046-A (GB)
Title: Improvements relating to track circuits for railway signalling systems
IPC: B61L1/18
Filed: 1955-11-03
Abstract: 823,046. Railway signalling track circuits. WESTINGHOUSE BRAKE & SIGNAL CO. Ltd., DUCKITT, H., and TILLOTSON, P. Oct. 26, 1956 [Nov. 3, 1955], No. 31465/55. Class 105. In a coded D.C. track circuit having one, viz. 11, of the two rails only used as the return for A.C. traction power current and the other, viz. 12, divided into insulated sections by insulated joints 13, 14, the track relay unit includes a transductor 23 composed of a magnetic circuit linked with windings 26, 27 in an A.C. circuit and with control windings 24, 25 connected across the track rails, the latter windings presenting a high impedance to the traction return current so that the saturable effects in the magnetic circuit are controlled predominantly by the code impulses of direct current received from the track feed via the rails 11, 12, the A.C. circuit being connected to the code following relay 30 through a full-wave rectifier 28. By this means the relay 30 is isolated from the effects of intruding traction return currents. The control windings 24, 25 present to the A.C. traction return currents an impedance which is as high as is compatible with the sensitivity of the relay 30 to the resulting distortion of the code impulses. As shown, the decoding circuit comprises first and second relays 31, 32 each in series with a condenser 33a, 33b and each being shunted by a rectifier 36a, 36b so that each condenser can be charged independently of the operation of its associated relay alternately under the control of the code following relay 30, by means of front contacts 34 and back contact 35 respectively and when not being charged, when the front contacts 34 or back contact 35 open, the condensers discharge through their associated relays to maintain them operated. The relay 31 has a front contact 31a in series with the back contact 35 of the code following relay 30 in the circuit of the relay 32 so that the condenser 33b can only charge when the relay 31 is energized. The relays 31, 32 have contacts 31b, 32a in series in the circuit of the clear track indication lamp 37 and contacts 31c and 32b in parallel in the circuit of the occupied track indication lamp 38. In the track feed set the coding contact 16a operated by the coding relay 16 is inserted between the input side of the fullwave rectifier 17 and the source of alternating current and to suppress sparking a resistance 21 and condenser 22 are connected in series across the primary winding of the transformer 15. To reduce the effects of build-up voltages across the rectifier 17 by the traction return currents in the rails, a protective choke 18 is connected in series in the positive feed output circuit of the rectifier 17 and a variable resistance 19 regulates the magnitude of the code impulses. A lowimpedance path 20 to the traction frequency currents is connected across the output circuit of the rectifier to limit the A.C. voltage developed across the output terminals by the traction current.
Patent GB-864368-A (GB)
Title: An installation to utilise waste heat from siemens-martin open-hearth furnaces or the like for generating steam
IPC: F27D17/00
Filed: 1959-09-16
Abstract: 864,368. Waste-heat steam boilers. VORKAUF, H. Sept. 16, 1959 [June 5, 1959], No. 31586/59. Class 123(2) The heating surfaces of a steam generating plant associated with a Siemens- Martin open-hearth furnace 1 comprises tube banks 7, 8 of a waste heat boiler 6 heated by waste gases flowing thereto from the furnace through a duct 5 and certain water-cooled constructional ports of the furnace such as the door frames surrounding the charge openings 2, 3, 4, both the boiler and the furnace heating surfaces delivering steam-water mixture into a common drum 9 by pumps 11, 10 respectively, the pumps being independently controllable so that the two circulations can be adjusted in accordance with the load variations during the furnace operating cycle. A standby pump 12, preferably having an output such that it can take over the duties of both of the pumps 11, 10 in the event of their failure is provided.
Patent GB-331162-A (GB)
Title: Improvements in and relating to processes for initially detonating explosives and tothe manufacture of detonating caps in accordance therewith
IPC: C06B43/00
Filed: 1929-10-17
Abstract: 331,162. Herz, E. von. Oct. 18, 1928, [Convention date]. Projectile fuzes; blasting detonators.-A solid nitric ester of the general formula CnHn+2 (NO3)n is ignited by a flame tongue from a suitable priming to cause detonation of other explosives. Examples of such nitric esters are: tetranitroerythrite, hexanitrosorbite, and hexanitromannite, with which may be mixed nitropentaerythrite in molecular proportions. Suitable igniting compositions are those containing magnesium or aluminium, for example a mixture of 58 per cent of barium nitrate. 29 per cent of magnesium powder, and 13 per cent of lead hypophosphite. The nitric ester, for example 0.5 grms. of a mixture'of nitromannite and nitropentaerythrite, may be loaded in an ordinary No. 8 detonator cap and covered by an inner perforated cap and compressed to 100-400 kg. per cm.<2>; 0.15-0.3 grms. of the igniting composition is then placed on top, and the same pressure exerted once more.
Patent GB-256109-A (GB)
Title: Improvements in advertising devices
IPC: G09F13/12
Filed: 1925-12-15
Abstract: 256,109. Brown, T. Dec. 15, 1925. Theatrical appliances. - A transparent or translucent vessel 1 is fitted with a mirror 4 so positioned as to give a symmetrical reflection of the front walls of the vessel. A design 5, which may be coloured, is etched on the mirror 4, and is seen only when illuminated from the rear by light from a lamp 8 directed by a reflector 7. The lamp 8, which may be intermittently lit, is situated in a base 3 apertured at 9, and the reflector 7 is of quarter-elliptical form in vertical cross-section. When the mouth of the vessel 1 is too small to admit the mirror 4 and reflector 7, the bottom 2 may be cut off, and the mirror and reflector attached thereto by wax, a clear area being left for the passage of light. The front half of the vessel may be filled with liquid, jelly, &c. A number of vessels 1 may be mounted on a mechanically rotated table so as tn pass over a source of light in turn.
Patent GB-946615-A (GB)
Title: Improvements in or relating to split clamping rings
IPC: B65D45/34
Filed: 1961-09-04
Abstract: 946,615. Band clamps. MEAD CORPORATION. Sept. 4, 1961 [Sept. 6, 1960], No. 31706/61. Heading E2B. In a split clamping ring 25 in which the ring is constricted by a lever 17 which is lockable in the constricted position by a latch 18 pivoted to the ring, the latch then overlying a portion of the lever, the overlying portion of the latch includes a finger 22 which projects radially of the pivot axis 19 of the latch and overlies the tip area 13 of the lever in the ring-constricting position of the lever. As shown, the latch 18 engages the lever through co-operating detent elements 11, 21 and 15, 30 which are so arranged as to tend to restrain the latch arm from inward or outward movement relative to the lever. Apertured tabs 23 and 16 are provided on the latch and lever respectively for fastening the latch against unlatching movement.
Patent GB-512099-A (GB)
Title: A transportable house wall
IPC: E04C2/38
Filed: 1938-11-02
Abstract: 512,099. Building slabs. FORSTER, F. Nov. 2, 1938, No. 31707. Convention date, Nov. 2, 1937. [Class 87 (i)] A building section comprises a panel 1 of straw fibres, impregnated with water glass or bituminous emulsion, and a surrounding wooden frame 3. The panel is glued in a groove 2 of the frame and may be covered on one or both faces with metal foil 4.
Patent GB-862691-A (GB)
Title: Improvements in or relating to screw holders for screw drivers
IPC: B25B23/10
Filed: 1958-10-04
Abstract: 862,691. Screw drivers. LINDBERG, F. L. Oct. 4, 1958, No. 31752/58. Class 61. A screw holder for a screw driver which has a shank 10 provided with an annular groove 14 so shaped as to form a shoulder 13, consists of a split sleeve 15 frictionally slidable on the shank 10 and provided with inturned corner portions 18 which engage the shoulder 13 to limit the movement of the sleeve 15 towards the screw driver blade 12, the split sleeve carrying a pair of parallel spring legs 21 formed on their ends with loops 22 each loop having at its forward end an annularly outwardly extending lip 23. The legs 21 form part of a U-shaped member 19 which has a finger piece 20 straddling the shank 10. In operation, when it is desired to connect for example a pair of plates 30, 31 together, the finger piece 20 is moved downwardly until the inturned corner portions engage the shoulder 13 and the head 28 of a screw is inserted between the loops 22. The sleeve 15 is then pushed upwardly to disengage the inturned portions 18 of the sleeve from the shoulder 13 and to bring the slotted opening in the screw head 28 into engagement with the blade 12 of the screw driver. When downward pressure and turning movement are applied to the screw driver, the screw is threaded into plates 30, 31, Fig. 4, until the lips 23 engage the plate 30. Further turning movement of the screw 29 to the final position will disengage the loops 22 from the screw head 28, Fig. 5.
Patent GB-604171-A (GB)
Title: Improvements in or relating to multi-stage rotary fluid power devices
IPC: F02B53/00
Filed: 1945-11-26
Abstract: 604,171. Rotary engines and compressors. STEVENS, A. H. (Reynolds Metals Co.). Nov. 26, 1945, No. 31807. [Class 110 (ii)] A multi-stage engine or compressor has pistons 11 travelling through annular chambers 22 and co-acting with recesses in a rotary abutment 28, the cross-sectional areas of the compressor cylinders 8<xx>, 8<x>, 8 being gradually diminished and those of the engine 26, 24, 22 being gradually increased. Spiral passages such as 56, 23 connect adjacent chambers. The compressor may lead gas to a combustion chamber 20 where it is fired, the gases expanding through the engine cylinder, or fuel oil may be injected into the compressed air as by a pump 61. Steam or compressed air may be used as the working fluid and the compressed air from the compressor used externally. To facilitate the starting of the internal-combustion engine, a pressure-operated valve may be used to admit fluid to the first and second cylinders simultaneously. The abutment and casing have cooling passages through them. Coolant for the casing enters through a pipe 45 and is pumped, by a pump 46, through a pipe 47 and ports 49. The coolant leaves by ports 51 and a pipe 52. Coolant for the hollow pistons is supplied from a passage 13, in the shaft 6 by way of ducts 12, cool oil displacing the hotter oil in the pistons. The gears 31<x>, 32<x> and 31, 32, coupling the abutment shaft 29<x> to the shaft 6, are used as gear pumps to force cooling and lubricating oil into the abutment. The latter has outlet ports 41 for oil to pass to the outside of the abutment rotor. When the fuel-injection pump 61 is used, the plunger 62 is actuated by a cam 64. The position of a needle valve 70, to control the oil inlet, may be adjusted simultaneously with the adjustment of a butterfly throttle valve in the air inlet pipe.
Patent GB-836128-A (GB)
Title: Improved machine for drilling very fine holes
IPC: G04D3/00
Filed: 1956-10-19
Abstract: 836,128. Drilling-machines. FERNSEH G.m.b.H. Oct. 19, 1956 [Oct. 29, 1955], No. 31866/56. Class 83 (3). A machine for drilling fine-holes comprises a drill 1 retained in bearings 5 and supported only by the force exerted by a driving belt 7 engaging a pulley 4 on the drill and located between the bearings, and means 10, 13, 18 for alternately thrusting the drill against the work and removing the thrust to allow the drill to be withdrawn by the axial component of the force exerted by the belt. Before drilling, a variable speed D.C. electric motor 9 for driving the endless rubber belt 7 is adjusted vertically by a handle 37, to position the pulley between the V-shaped white-metal, agate or synthetic jewel bearings 5 in a block 6. The work on a table 23, is brought up to the drill by a control 31 operating a lever which carries a thrustbearing for the table. A lever 10, pivoted at 11 and loaded by weights 12, bears on the drill to effect the feed and is raised, to enable the belt to raise the drill and clear swarf, by a lever-operated push-rod 14a operated by a cam 18 rotated by a knob 32, or by cams or eccentrics 13, 20 driven at a variable-speed by an electric motor 15 driving through gearing 15a, the lever 14 being urged towards the cams by a spring 22. The angular relationship between the eccentrics 13, 20, and thus the relationship between the drilling periods and pauses between them, may be varied by a knob 21. A screw 16 in the lever 10 cooperates with a feed-stop 17, and a contact 21a is closed, at the end of the feed-stroke, by the lever to energize a lamp 26. A lamp 25 of a different colour is energized through a contact 19 closed by the eccentrics 13, 20 during each advance of the drill. The work is positioned with the aid of a microscope 36 rotatable about the axis of the drill, and having a graduated eye-piece. A volatile lubricant, supplied to the work through a hyperdermic needle 28 by a hand-operated pump 29, is evaporated by a lamp 24 having an optical projection system, the brightness of the lamp being controlled by a variable resistance operated by a handle 34. In a modification, the cam 13 is rotated only once during the drilling of a hole and is so formed as to raise the lever 10 a number of times before allowing it to fall slowly to a predetermined level at the end of the operation. Reference has been directed by the Comptroller to Specification 705,451.
Patent GB-1317406-A (GB)
Title: Oscillation or bounce-suppressing device including a cam which  periodically moves a machine part
IPC: F16F15/02
Filed: 1971-07-07
Abstract: 1317406 Cams VOLKSWAGENWERK AG 7 July 1971 [17 July 1970] 31868/71 Heading F2K To suppress bounce of a cam tappet, arising from periodic oscillations, the surface of the cam possesses a basic shape which produces a desired displacement of the tappet in dependence upon the angular displacement of the cam, and on which shape is superimposed a periodic compensating oscillatory shape opposed in phase to the undesired oscillations of the tappet which are suppressed thereby, the superimposed periodic compensating shape being such that throughout the whole range of operation of the cam the frequency of this periodic shape changes as the cam rotates such that during each cam revolution an oscillatory motion is produced by the superimposed shape which compensates for and suppresses the characteristic frequency bounce of the tappet, the varying frequency of the periodic shape along the cam profile ensuring that the tappet bounce suppression is effective over the widely differing speeds of a motor-vehicle engine, the frequency at any given cam point being such that in at least one region of the cam speed the said frequency is equal to but opposed in phase to an undesirable oscillation frequency of the tappet, or to a whole-number multiple of it.
Patent GB-1131891-A (GB)
Title: Improvements in or relating to mosaic printing devices
Inventor: PHILLIPS ALAN
IPC: B41J2/27
Filed: 1965-07-26
Abstract: 1,131,891. Selective printers. EXCHANGE TELEGRAPH CO. Ltd. 27 June, 1966 [26 July, 1965], No. 31883/65. Heading B6F. A selective printer in which characters are formed by successive columns of dots comprises a matrix head provided with seven hammer heads 1a . . . 1g aligned in a vertical line and attached to shafts 2 extending alternately to one side or the other and mounted on respective fulcrum bars 3. Free ends of shafts 2 are articulated to plungers 6 of solenoids 7, which are actuated selectively on receipt of pulses representative of a character. The hammer heads are restored by springs 8 which press the hammers 1a . . . 1g against stops 9. The matrix head may be mounted on a traversable carriage.