baber/WOPTO huggingface dataset:
Patent GB-1376621-A (GB)
Title: Transistor amplifier circuit with adjustable gain
IPC: H03G1/00
Filed: 1972-01-26
Abstract: 1376621 Transistor gain control arrangements POST OFFICE 26 Jan 1972 [29 Jan 1971] 3482/71 Heading H3T  A gain-controlling voltage is applied from terminal 8 to the emitter of transistor T1, which is in common-emitter circuit for signals applied to terminal 1. The emitter circuit of transistor T1 includes diode-connected transistors T3, T4 the voltage across which is applied to the base of a further transistor T2, the collector of which is connected to the collector of transistor T1. Resistor 13 in the emitter circuit of transistor T2 is chosen so that the change in collector current in this transistor compensates for the change in collector current in the transistor T1 as the gain control voltage is varied. Transistors T3, T4 provide temperature compensation.
Patent GB-306533-A (GB)
IPC: B62D55/065
Filed: 1929-02-01
Abstract: 306,533. L³becker Maschinenbau- Ges. Feb. 24, 1928, [Convention date]. Addition to 304,793. Suspending and mounting bodies. - A body or frame carrying loads the position of which may change is supported at four or more points which are interconnected so that the supporting forces are equal at all points other than those carrying at any time the heaviest load. The supporting points p, q, r, s may each consist of a cylinder and piston all connected to one another by pipes t containing fluid which is put under pressure by the load. The two pistons, for instance, those at q, s, carrying the heaviest load, enter the cylinder until a collar prevents further movement. The remaining supporting points p, r carry loads which are equalized by the pressure fluid.
Patent GB-1455806-A (GB)
Title: Surge voltage arresters
IPC: H01T1/22
Filed: 1975-01-28
Abstract: 1455806 Spark gaps SIEMENS AG 28 Jan 1975 3609/75 Heading H1D Activating material 5 is applied at least to the inner wall of an annular electrode 3 and to the faces of the main electrodes 1 and 2 of a two-path surge arrester in which the said faces of the main electrodes 1 and 2 are provided with annular projections 4 to form hollow dispenser electrodes. In the arrester shown the projections 4 are metal rings, e.g. of iron, which are also provided on both faces of the electrode 3. The faces of the main electrodes 1 and 2 have a gridiron pattern of grooves 7 to anchor the electron emissive material 5 which may be extended over the facing surfaces of the rings 4 (Fig. 2, not shown). The arrester may be mounted in a metal tube 8 with the electrode 3 in contact with the tube 8 which may be earthed. The glass or ceramic insulators 6 are grooved to provide insulating gaps 10 between the tube 8 and the main electrodes 1 and 2 which are contacted by members 9.
Patent GB-138990-A (GB)
Title: Improvements in brush head and mop fasteners
IPC: B25G3/00
Filed: 1919-02-14
Abstract: 138,990. Haigh, W. Feb. 14, 1919. Handles with clamping-devices for brushes and mops; axial holding-devices. - A brush or mop head is secured to its handle by an adjustable clamping-device embracing the brush head or mop and slidably operated along the sides of the handle by milled nuts. A spike projecting axially from the end of the handle may be provided to engage the head or mop. As shown, the handle A has a projecting spike B on which the brushhead C, or mop D, is impaled, and the head is secured by a clamping-wire E passing round it and slidably engaging eyelets or guides F on the sides of the handle. The ends of the wires F are threaded for engagement of milled nuts G for tightening-up the clamp. Reference has been directed by the Comptroller to Specification 9325/10.
Patent GB-455188-A (GB)
Title: Improvements in or relating to safety devices in connection with the remote control of electric circuits
IPC: H02P1/04
Filed: 1936-02-06
Abstract: 455,188. Protective cut-out arrangements ; control of motors. WEST & CO., Ltd., A., Lewes Road, Brighton, Sussex.- (Assignees of Soc. d'Usinage de Material Electrique; 25, Rue Gambetta, Boulogne- Billancourt, Seine, France) Feb. 6, 1936, No. 3626. Convention date, Dec. 19, 1935. [Classes 38 (iii) and 38 (v)] A control system for an electric circuit such as that of a motor MT driving a coal cutter comprises two relays A, B, both of which must be at their responsive positions for the motor to start, the relay windings being connected in series and a remote control switch M being provided for establishing a controlling circuit in shunt with the winding of the relay A, the arrangement being such that the relay B is at the operative position or not according to whether the controlling circuit is established or not, so that the relay B is opened upon accidental open-circuiting of the control circuit, and the relay A opened upon short-circuiting of the control circuit. The relay coils may be energized from a step-down transformer T and the relays may control the motor directly, or through a contactor. The motor MT, the switch M, and an impedance C in the control circuit are located near the controlled gear, and connected to the rest of the apparatus, installed at a fixed remote point, by means of a trailing cable, starting of the motor or energization of its supply cables being prevented if the control conductors in the trailing cable are short-circuited or open-circuited. One of the controlling conductors is normally an earth line and if this earth circuit is at fault similar protection is afforded. Safety is also ensured if a connecting plug becomes disconnected. Reactances may be connected in series or parallel with the relay windings.
Patent GB-139866-A (GB)
Title: Improvements in or relating to sewing machines
IPC: D05B51/00
Filed: 1919-02-14
Abstract: 139,866. Cooper, J., and Twin Bobbin Sewing Machine Co. Feb. 14, 1919. Sewing - machines ; governing n e e d l e thread. - A take-up lever g is pivoted at one end h to the machine frame and is actuated by a link k pivoted to an intermediate point j on the take-up lever and to a pin m on the needledriving crank which is approximately 90 degrees behind the needledriving crank e.
Patent GB-471804-A (GB)
Title: Improvements in the manufacture of sheets of dough
IPC: A21D13/00
Filed: 1936-02-06
Abstract: Thin sheets of dough about 0,4-0,6 mm. thick and about 0,5-1 sq. metre in area which are to be used in making pastry by rolling in several layers with an interposed filling of fruit, meat &c. are rendered capable of being stored by a slow drying by means of a gaseous drying medium, e.g. air, of 60-90 per cent relative humidity and preferably at room temperature, e.g. 16-17 DEG  C., until the sheets while still soft and pliable have acquired a non-sticky condition on the surface, and then packing the sheets. For the drying operation the sheets may be placed on textile material, e.g. linen or jute cloths spread on wooden plates in a closed drying chamber. Alternatively, up to 4 or 5 sheets of dough may be placed on top of one another, with the textile material interposed, on the supporting plates which may be placed closely over one another on a frame which is inserted in a drying chamber the walls of which have variable apertures, or the frame may itself be provided with such walls.  The humidity of the air, which is circulated through the drying chamber by means of fans, may be adjusted in a preliminary chamber.  The sheets may be treated first with air of high humidity, e.g. 90 per cent, followed with air of lower humidity but still not less than about 60 per cent.  The sheets may be conveyed through the chamber in the direction opposite to that of the air.  The sheets may be cooled, e.g. to 0 DEG  C., prior to cutting up, which may be effected on a support having ruled lines visible through the sheets, and packing, e.g. in hermetically sealed packages Keeping may be improved by adding preservatives to the dough or by treating the sheets of dough, e.g. after packing in transparent celluloid sheets, with ultra violet light or other sterilizing radiation.
Patent GB-524706-A (GB)
Title: Improvements in or relating to stirring apparatus for furnaces with gas or electric heating
IPC: F27D27/00
Filed: 1939-02-03
Abstract: 524,706. Agitating charges. FIDES GES. FUR DIE VERWALTUNG UND VERWERTUNG VON GEWERBLIGHEN SCHUTZRECHTEN. Feb. 3, 1939, No. 3703. Convention date, Feb. 3, 1938. [Class 51 (ii)] Mechanical stirring apparatus for furnaces comprises a poker 6 adapted to be reciprocated within a tube 2 surrounded by a water cooling jacket 1. The poker is attached to a frame 5 which is connected by tubes 4 to a piston 3 in the jacket 1. Water under pressure passes from a main 13 through one of the tubes 4 to one end of the piston to move it outwardly and carry with it the poker 6, the exhaust port 15 and passage 11 being closed. A port 12 is open to allow for the exhaust of water from the opposite side of the piston. Upon reversal the port 12 acts as the inlet for pressure water and the port 15 as an exhaust port. The poker is hollow and has an internal pipe 8 for the circulation of cooling water. The poker slides in a bearing 14 and a bearing at the outer end formed by a plug cock 10 which, when the poker is removed from the tube 2, is closed to prevent escape of gases from the furnace. The flange 17 by which the apparatus is mounted on the furnace may be in the form of a spherical cap to enable the poker to operate in any desired direction.
Patent GB-563664-A (GB)
Title: Improvements in methods of stripping insulation from wires
IPC: H02G1/12
Filed: 1943-03-08
Abstract: 563,664. Cutting by burning. SALISBURY, A. E., and TOWERS, R. March 8, 1943, No. 3716. [Class 31 (i)] [Also in Group XXXVI] Insulation is stripped from electric conductors by heated interengaging elements which are moved to trap and sever the required portion of insulation. The elements comprise looped wires A, B mounted respectively on slides E and refractory material D, the slides being connected to an insulating base F. The wires A, B are connected in parallel or series to a source of current and are moved relatively to one another by linkage actuated by hand, foot, or power. The wires may be replaced by flat strips notched to embrace the wire conductor. An adjustable stop may be provided to determine the length of insulation to be removed.
Patent GB-942464-A (GB)
Title: Apparatus for coating structural elements, furniture and the like
Inventor: FAGENCE SIDNEY WALTER
IPC: B32B27/00
Filed: 1960-05-10
Abstract: 942,464. Upholstery &c. M. L. SHELLEY & PARTNERS Ltd. June 15, 1961 [May 10, 1960], No. 3789/63. Divided out of 942,463. Drawings to Specification. Heading A4M. Similar to Specification 942,463 but the claims are directed to the apparatus for applying the plastic covering sheet.
Patent GB-199333-A (GB)
Title: Bond or tie for hollow walls
IPC: E04B1/41
Filed: 1923-02-08
Abstract: 199,333. Wit, J. H. de. Feb. 8, 1923. Wall - ties. - A bond or tie for hollow walls consists of a galvanized iron wire with the ends bent in opposite directions to form hooks which lie in the same horizontal plane, and the centre portion 3 bent zig-zag in a vertical plane.
Patent GB-481327-A (GB)
Title: Improved methods of bonding highly resilient materials to materials of low resiliency
IPC: B29C70/68
Filed: 1937-02-09
Abstract: 481,327. Attaching rubber to other surfaces. GUY & MURTON, Inc. Feb. 9, 1937, No. 3835. Convention date, May 7, 1936. [Class 70] Rubber is bonded to a rigid surface, e.g. metal, wood or concrete, by attaching to the surface a perforated sheet-like metal element substantially co-extensive therewith and curing the rubber under pressure while in place upon the sheet, whereby the perforations are filled with rubber. Thus, (a), a slit, expanded metal sheet having its sharp edges blunted is secured by spot welding to a metal block : (b) a sheet of wire mesh is secured to a metal block, by screws, spot welding or soldering : (c) perforated metal sheets 20, 21, Fig. 3, are superimposed, one of them, e.g. 20, being secured to a metal base ; the sheets may be secured to each other or held together by the rubber 18 ; the rubber may be secured to the sheets from one side only or, as shown, from both sides : (d) slit, expanded sheets 28, 29, Fig. 5, are secured, as shown, to concentric metal sleeves 26, 27 and a rubber sleeve is introduced into the space between the sleeves and cured therein under pressure : (e) a metal base is coated with molten solder and a sheet of tinned wire mesh or slit expanded metal is placed thereon, being allowed to freeze to the base ; the heat remaining after freezing may be utilized to assist in curing the rubber ; in this method the tinning may be replaced by pickling and flux-treatment.
Patent GB-843015-A (GB)
Title: Automatic engine cut-off more especially for pump-equipped tank truck vehicles
Inventor: POWELL WILLIAM GRANT
IPC: B64F1/28
Filed: 1957-02-06
Abstract: 843,015. Engine stop-gear. SCULLY SIGNAL CO. Feb. 6, 1957, No. 4045/57. Class 122 (4). [Also in Group XXVIII] Emergency stop-gear for an internal combustion engine driving a liquid pump comprises switching means responsive to a predetermined pump discharge pressure to establish an electric circuit in parallel with the breaker points of the engine ignition system which is thereby rendered ineffective. The invention is shown applied to the pumping system of a tank vehicle in which the liquid to be delivered is pumped from the vehicle storage tank to a discharge line 10 by a pump 6 driven, through clutch mechanism, from the vehicle engine 1. The pumping equipment is protected against destructive pressures that occur if the pump is driven at speeds above those at which the normal pump relief valve 7 is effective by a pressure-responsive engine cut-off switch 13 which is connected by a pipe 12 with the discharge line 10 and comprises a pressure responsive element 15 which, when the pump pressure exceeds a predetermined amount, actuates a snap-action leaf-spring 26 to close contacts 27, 28 and connect the low voltage terminal C on the distributer to earth through wires A and B to thereby render the ignition system ineffective and stop the engine. The switch 13 and element 15 are urged apart by a spring 23 surrounding a rod 24 secured to the element 15 and carrying a switch-actuating button 25 and the switch is adjusted by a screw 30. An adjustable restriction valve 22 interposed between the pipe 12 and the element 15 ensures that the switch is not operated by momentary high-pressures and when the switch is operated, provides time for the engine to stop before the switch is re-opened.
Patent GB-899106-A (GB)
Title: Improvements in or relating to moving coil electrical devices
Inventor: DUDSON MALCOLM FOX
IPC: G01R5/06
Filed: 1960-02-05
Abstract: 899,106. Electric measuring instruments. SMITH & SONS (ENGLAND) Ltd., S. Feb. 6, 1961 [Feb. 5, 1960], No. 4200/60. Class 37. In a method of assembling the parts of a moving coil instrument in which an inner magnetized core 15 and an outer steel ring 36 are concentrically mounted on a frame 12, the two parts are held in position by means of two plastic parts 33 which fit into slots 14 and are held in a compressed state between the two parts. The coil 18 mounted on former 17 fits into the aperture between the inner magnet of the ring 36 and the frame, and the former carries pivots 20 which fit into jewelled screws 23 in the frame. The washers 25 anchor the spiral springs 28.
Patent GB-100811-A (GB)
Title: Improvements in Spring Wheels.
Inventor: CHUPKA MIKLOS
IPC: B60C7/18
Filed: 1916-03-22
Abstract: 100,811. Chupka, M. March 22, 1916. Metallic spring bodies and cores.-A flexible rim 16, 17, Figs. 3 and 4, of leather, rubber, &c. carries a rope tread 18 and is supported by radial pairs of concentric helical springs 19, 20. The inner ends of the springs are secured by wire staples 22 to a soft band 21 carried by the inner rim. The outer ends of the springs are secured by wire clips 25 to circumferential tie-wires 26 fixed to the outer-rim.
Patent GB-851899-A (GB)
Title: Improved process for resolution of gaseous mixtures
IPC: C07C7/11
Filed: 1957-02-07
Abstract: Hydrocarbons are purified by absorption of impurities with selective solvents and the solvent stream is heat-exchanged with a solvent which has been stripped and is being recycled to the absorption zone in two separate stages with an extraneous heat-exchange cooling step between the two heat exchange steps. The depleted solvent and the purified gas may be contacted with a liquefied pure gas so as to remove any solvent in the purified gas and to saturate the depleted solvent with the gas which has to be obtained in a pure state and thus prevent any gas being absorbed from the initial gas stream. Exemplified is the purification of ethylene, obtained as an off-gas from a polyethylene producing process, in which acetylene is removed. Solvents which may be used in separating acetylene and/or methyl acetylene from olefins include dimethyl formamide, acetone, acetic anhydride, butyrolactone, N-methyl-2-pyrrolidone and dimethylsulphoxide.  Butadiene can be separated from butenes employing either anhydrous or aqueous furfural ; propylene may be separated from propane using dimethylformamide and aromatic hydrocarbons may be separated from aliphatic hydrocarbons employing diethylene glycol or triethyleneglycol.ALSO:Gaseous mixtures are purified by absorption of impurities with selective solvents and the solvent stream is heat-exchanged with a solvent which has been stripped and is being recycled to the absorption zone in two separate stages with an extraneous heat-exchange cooling step between the two heat-exchange steps. The depleted solvent and the purified gas may be contacted with a liquidified pure gas so as to remove any solvent in the purified gas and to saturate the depleted solvent with the gas which has to be obtained in a pure state and thus prevent any gas being absorbed from the initial gas stream.  Exemplified is the purification of ethylene, obtained as an off-gas from a polyethylene producing process, in which acetylene is removed.  Solvents which may be used in separating acetylene and/or methyl acetylene from olefins include dimethyl formamide, acetone, acetic anhydride, butyrolacetone, N-methyl-2-pyrrolidone and dimethylsulphoxide. Butadiene can be separated from butenes employing either anhydrous or aqueous furfural; propylene may be separated from propane using dimethylformamide and aromatic hydrocarbons may be separated from aliphatic hydrocarbons employing diethylene glycol or triethyleneglycol.
Patent GB-526108-A (GB)
Title: Improvements in and relating to pocket cases and the like
IPC: B42F11/00
Filed: 1939-02-09
Abstract: 526,108. Pocket cases. HOLLOWAY, Ltd., A. E., MOORE, A. T., and GROOM, D. Feb. 9, 1939, No. 4266. [Class 18] A pocket case is formed by cutting slits b, c, h, Fig.1, in, or removing parts e of a piece of facing material, and then attaching pieces j, n, p, Fig. 6, of lining material to the back of the facing material, the slits or slots forming entrances to the superposed pockets thus formed. A back r is then attached, its flap s having a tongue t which may be passed through slits i. The facing material may be in two pieces, the attachment bars u then being omitted, and the slits may bend through an angle, e.g., a rightangle, so that the pockets may open at both side and top.
Patent GB-676140-A (GB)
Title: Improvements in corner stops or side locators for table tops and the like
IPC: A47B13/08
Filed: 1950-02-20
Abstract: 676,140. Table tops. SEIFFERT, C. F. G. Feb. 15, 1951. [Feb. 20, 1950] No. 4298/50. Class 52 (iii). A corner stop or side locator, for rigid sheets of material used to cover tables &c. comprises an element having a part-circular periphery and an upwardly directed portion acting as a locating element or stop. As shown, a table top 15 is recessed at 16 to receive the plate 7 of a corner stop. A circular recess is drilled and extended to fit the plate by making tangential incisions and removing the waste material. The upstanding angle portion 9 receives the corner of a sheet 12 of glass, &c. In a side locator, the plate is D-shaped, an upwardly directed portion being provided on the straight edge. In a modification, to provide a corner stop for a cover sheet of approximately the the same size as the table, the plate 7 is rectangular with one corner rounded.
Patent GB-390789-A (GB)
Title: Improvements in or relating to film feed mechanism for photographic cameras
IPC: G03B1/66
Filed: 1933-02-13
Abstract: 390,789. Photographic cameras. FRANKE, P., 32c, Wolfenb³ttlerstrasse, and HEIDECKE, R., 7, Seesenerstrasse, both in Brunswick, Germany. Feb. 13, 1933, No. 4384. Convention date, Feb. 26, 1932. [Class 98 (i).] In film-feed mechanism wherein the film is wound by movement of a crank 1 between a fixed stop 2 and a stop 3 which is moved stepwise on each operation of the crank, the stop 2 is adjustable to compensate for different thicknesses and sizes of film. As shown, the stop 2 is adjustable along a slot 6 and is furnished with a pointer 7 co-operating with a setting scale 8. In a modification, the stop 2 is fixed and an adjustable wedge is interposed between the stop and crank.
Patent GB-546570-A (GB)
Title: Improvements in or relating to ball and float valves
IPC: F16K33/00
Filed: 1941-04-03
Abstract: 546,570. Ball-and-float valves. TYDEMAN, G. April 3, 1941, No. 4448. [Class 135] A ball-and-float valve with means for adjusting the operative relation of the float and valve comprises a ball or float of non-ferrous metal with a tube B of non-ferrous metal passing through it away from its true axis and protruding beyond the outer surface of the float and being provided with two rows of staggered holes C adapted to receive a fixing pin D which passes through a hole or one of a series of holes in the end of the float arm remote from the fulcrum. By removing the fixing pin, rotating the float and replacing the fixing pin, the controlled level may be adjusted.
Patent GB-365830-A (GB)
Title: A method of and mechanism for transporting section-spacing blocks in a book-binding machine
IPC: B42B2/02
Filed: 1931-02-13
Abstract: 365,830. Book --stitching machines. POLLAK, J. E., 20, Holborn, London.- (Brehmer, Geb. ; Plagwitz, Leipsic, Germany.) Feb. 13, 1931, No. 4586. [Class 112.] Section spacing blocks discarded at the rear of a book stitching machine are carried to the front of the machine by arms 14, 15 which after picking up a block 9 in a clamp C swing over as indicated by the arrow P and drop the block into a tray 23. The arms 14, 15 are driven from a shaft 43 bv a cam slotted eccentric 44 and rack and pinion 42, 41. Connecting the pinion 41 and a shaft 13, to which the arms are secured, is a clutch comprising a spring pressed sleeve which engages with the pinion 41 when a hinged member 36 is depressed by the operator through linkage 32 .. 35, Fig. 1. The clamp comprises an angle pin 17, Fig. 6, slidably mounted in a slot 17a formed in the arm 15 and two spring-pressed members 19 pivoted to the piece 17. When it is required to transport a block the arms are swung over to the position shown in Fig. 1, the block is picked up and the arms then swung back again. When the arms reach the position shown in Fig. 3 trip members 29 on the clamp members 19 engage cam faced members 27 and the members 19 are deflected and the block 9 is dropped into the upper part of the tray 23. The block is held momentarily by stops 77 carried on pivotal levers 25 until the levers pass over extensions 69 of the levers 25 and tilt the levers to allow the block 9 to slide forward. The returned block may be brought from the tray 23 to the book pad by a shute 23a, Fig. 5. The blocks are retained in the shute until required by two pivoted arms 47, which carry stops 49 projecting into the sides of the shute. When a block is required arms 56 are swung upwards by a suitable mechanism and open the arms 47. The block above the lowest one is held by spring blades 51 which close together as the levers 47 open. Specification 362,863 and 365,270 are referred to.