baber/WOPTO huggingface dataset:
Patent GB-813008-A (GB)
Title: Electronic bistable devices
IPC: H03K3/12
Filed: 1957-01-22
Abstract: 813,008. Multi-stable-state circuits. ROCHAR ELECTRONIQUE S.A. Jan. 22, 1957 [May 29, 1956], No. 2296/57. Class 40 (6). A two-stable-state trigger pair circuit comprising a reciprocally coupled pair of amplifying devices, such as electric discharge tubes, is triggered by control pulses which are applied via a gate alternately to the two amplifying devices. Fig. 5 shows a pair of tubes 1, 3, 4, 6 which are reciprocally coupled and have a common load so as to function as a bi-stable circuit. Trigger. pulses are applied from source 24 via pentode tubes 27, 30 and 31, 34 which function as gates. If initially tube 27, 30 is conducting and 31, 34 cut off and the left-hand tube of the bi-stable pair is conducting, a trigger pulse passes gate tube 27, 30 and appears as a negative pulse at point 18 to cut off tube 1, 3 the rise in the anode volts of which causes tube 4, 6 to conduct, thus triggering over the bistable pair. The drop in anode volts of tube 4, 6 produces a negative pulse at point 18 which applied via delay device 23 cuts off tube 27, 30 at its suppressor grid. Gating tube 31, 34 is similarly made conducting so that the subsequent trigger pulse from source 24 passes via gate 31, 34 to trigger the bi-stable pair to its other. stable state. The delay devices 23, 231 ensure that the gating tubes are not actuated until the changeover of the bi-stable circuit is completed. Resistors 39, 40 match the suppressor grid input impedance of the gating tubes with the output impedances of delay devices 23, 231. Since the gating circuit ensures that input pulses are applied only to one of the two tubes of the bi-stable device so as to cut off this one during a time sufficient to enable the other tube to become fully conducted a high-repetition frequency of input pulses may be applied although relatively low values of coupling capacitors 13, 16 are used. In a modification shown in Fig. 6 the input pulses are applied via diode gates 40, 41, 42, 43. In a further modification shown in Fig. 7 each coupling capacitor, only one of which 16 is shown, is connected across a resistive potential divider in which the ratio of value of the resistors 7, 7<SP>1</SP> is equal to that of resistors 17, 17<SP>1</SP> and the latter resistors are given a high value relative to the former. In this modification the capacitors such as 16 are given a high value relative to the stray capacitances such as 26 without detriment to the speed of operation of the bi-stable pair.
Patent GB-1201670-A (GB)
Title: Improvements in scissor type lifts
Inventor: GOUGH GEORGE TERAH
IPC: B66F7/08
Filed: 1968-01-16
Abstract: 1,201,670. Platform elevators; safety catchgear. GOUGH & CO. (HANLEY) Ltd. 15 Jan., 1969 [16 Jan., 1968], No. 2362/68. Headings B8H and B8L. [Also in Division F2] When the speed of descent of a platform P mounted on scissor links 2, 4, exceeds a predetermined value, a gripper mechanism, mounted adjacent the rollers 18 supporting the lower ends of the links 4 on tracks 20, is actuated to grip horizontal guide rails 34 to arrest the descent of the platform. The gripper mechanism comprises a pair of toothed cams 28 which are mounted on shafts 50, 52 pivoted on plates 26 on the axle 16 of the rollers 18, which are interconnected by a chain 36 and which are normally held out of engagement with the rail 34 by springs 32. A release mechanism 44 on the plates 26 normally connects the plates to torpedo member 42 on an endless cable 48 which passes around pulleys 56, 58 mounted on the base frame B. As the platform descends, the movement of the lower ends of the links 4 along the tracks 20 causes, through the endlss cable 48, rotation of the pulley 58 which, through a step-up gear-box and an endless cable 66, drives a governor 68. When the speed of descent reaches a predetermined value, the governor 68 actuates the electrical controls of the hydraulic circuit of the lift ram 24 to halt the ram. If a greater overspeed occurs, the governor will lock the cable 66 and hence the cable 48. Continued movement of the links 4 will then drag the torpedo out of the release mechanism 44 and cause a cable 38, connected between the torpedo and an arm 54 secured to the shaft 52 of the upper cams 28, to rotate the arm 54 to bring the cams into gripping engagement with the guide rails 34.
Patent GB-505691-A (GB)
Title: Improvements in and relating to means for controlling the actuation of reciprocating rammers for advancing and slicing fuel on furnace grates
IPC: F23H11/22
Filed: 1938-01-25
Abstract: 505,691. Slicing &c. fuel on furnace grates. STEINMULLER, C. H., (trading as STEINMULLER, L. & C.). Jan. 25, 1938, No. 2366. [Class 51 (i)] [Also in Group XXXVII] A reciprocating transverse bar for advancing and slicing fuel on furnace grates is actuated by a reversible motor through adjustable distances of travel over the grate surface, the motor being started at predetermined intervals by a switch clock, automatically reversed when the bar has travelled a predetermined distance and automatically stopped when the bar arrives at the starting point. The driving shaft of the reciprocating bar drives a toothed wheel A, Fig. 1, which is geared to a wheel B having an adjustable disc C clamped thereto by a nut D. The wheel B carries an adjustable cam E and the disc C is provided with a pointer F which indicates on a fixed scale G the position of the bar. A roller K on an outwardly pressed switch rod J engages the cam E, the periphery of the disc C and also enters a recess L in the disc C. The wheel B also carries a pointer M which stands at zero of the scale G when the bar is at rest. When the mains switch 7 is closed current flows through conductor 4 to the switch clock 3 which closes switch 8. Current then flows from the conductor 4' through the contacts 9, 10 of the reversing switch H closed by the cam E and through the conductor 11, switch 8, conductor 12, contacts 13 normally closed, conductor 14 to the coil 15 of a relay 16 to the neutral wire 5. The relay 16 closes contacts 17, 20, 21. The contacts 17 complete a holding circuit which keeps the relay 16 energized. The closing of contacts 20, 21 energizes the motor 22 which drives the reciprocating bar and rotates the disc C. After the cam leaves the roller K the latter runs upon the periphery of the disc the contacts 9, 10 remaining closed until the roller K enters the recess L when the contacts 9, 10 are opened and the motor 22 is stopped by de-energizing the relay 16. At! the same time contacts 29 are closed and contacts 23, 24 of the reversing switch H being also closed, current flows to the coil 27 of relay 28 through the conductor 26 and the motor 22 is driven in the reverse direction to reverse the direction of travel of the bar which continues until the cam E engages the roller K of the switch when the motor is stopped. The motor 22 may be controlled by the operation of push buttons 39, 33.
Patent GB-853816-A (GB)
Title: Improvements in or relating to closure means for multi-pass fire tube boilers
Inventor: SPURR SAMUEL WRAYSBURY
IPC: F22B9/14
Filed: 1958-01-23
Abstract: 853,816. Boiler casing doors. SPENCERBONECOURT-CLARKSON Ltd. Jan. 22, 1959 [Jan. 23, 1958], No. 2368/58. Class 25 [Also in Groups XIII and XXV] The doors 16, 14 of gas-turning and gasoutlet chambers 10, 11 at the rear end of a three-pass fire-tube boiler (see Group XIII) are supported by tubular davit-arms 40, 80 which are pivotally mounted respectively to the inner and outer faces respectively of a cylindrical extension part 12 of the boiler (see Group XXV). The door 16, which is sector-shaped, consists of two inner layers 20, 21 of refractory material which are surrounded by a metal case 22 and are secured by hook-shaped steel rods 19 to an outer metal plate 17 also welded to the case 22. Lugs 23, 24 along the sides, and a bracket 32 in the bottom, of the door cooperate respectively with studs 26, 28, 33 having nuts for clamping the door to the rear edge of a wall 15 defining the chamber 10, a peripheral recess in the door accommodating a sealing cord 38. A pivotal support between the door 14 and the davit arm 40 comprises a bolt 63 which threadedly engages a metal block 65 in the upper edge of the door and is adjustable vertically in slots in the davitarm be means of nuts 70 so that the door can be properly located with respect to shines 71 attached to the inner face of the lower sector of the extension part 12. The rear door 14 comprises a circular metal plate which is bolted to the rear edge of the extension part 12 and carries, on its inner peripheral edge, an angle section ring 102 which retains a layer of refractory material 105. A segmental-shaped baffle plate 108, having a pair of handles 110, is bolted to the outer face of the door 14. The inner end 81 of the davit-arm 80 rotatably supports a hook 95 for engaging a slot 112 in a bracket 111 attached to the upper outer face of the door 14. The doors 14, 16 have corresponding apertures for the reception of a sight tube 125 for viewing a burner.
Patent GB-717231-A (GB)
Title: Improvements in or relating to electric discharge devices
IPC: H01J9/04
Filed: 1951-01-31
Abstract: 717,231. Electrode materials and processing. GENERAL ELECTRIC CO., Ltd., and ROBERTSHAW, R. G. Jan. 15, 1952 [Jan. 31, 1951], No. 2480/51. Class 39(1) A coating for a member of a discharge tube is first prepared by pouring a suspension of particles in a dissolved binder on to a smooth surface which is evaporated to produce a film, a part or whole of which is then stripped from the support, wetted by a solvent for the binder, and applied to the member which is heated to remove the binder and solvent. A suspension of thorium particles in a nitrocellulose binder in butyl acetate is poured on to a polished glass surface, and the acetate evaporated. A part of the film is stripped from the plate and is applied to one end of a tantalum spiral cathode which is dipped in acetone so that the strip wraps itself around the spiral. The cathode may be mounted in a magnetron which during processing causes evaporation of the binder and the sintering of the particles to the cathode. In another form, a thoria film may be applied to the cathode preferably on a film of tungsten particles. Alumina may be similarly applied to metal parts of discharge tubes.
Patent GB-308021-A (GB)
Title: Improvements in boxes or cases for electrical apparatus
IPC: H02G3/14
Filed: 1928-01-26
Abstract: 308,021. Heath, H., and Bill, R. W. Jan, 26, 1928. Boxes and cases.-A box or case for electrical apparatus constructed wholly or mainly of metal or of insulating material, has the body built ot separate sides A, ends B, and bottom C attached to corner pillars D provided with lugs or feet F for attaching the box to a wall or similar support. The sides &c. may be detachably secured to the pillars and the feet may be integral with the pillars or attached thereto. The lid G is made of sheet metal or insulating material and has corner pieces J which are complementary to lugs E on the corner pillars D and, with eyebolts and nuts L, are used to secure the lid to the box. The lid may be strengthened at the edges by wire, strip, angle or channel material and fitted with a watertight or dusttight gasket.
Patent GB-1046532-A (GB)
Title: Switchgear for arcless disconnection of a.c. power circuits
Inventor: UBIIKO ALEXANDR MIKHAILOVICH
IPC: H01H9/42
Filed: 1964-01-21
Abstract: 1,046,532. Arcing preventing in switches. GOSUDARSTVENNY INSTITUTE PO PROEKTIROVANIU I ISSLEDOVANIUVZRUVOBEZOPASNOVO ELEKTROOBORUDOVANIA. Jan. 21, 1964, No. 2562/64. Heading H2B. A switch operated by a solenoid 1 against spring bias 11, 12 has two pairs of contacts 2, 3 connected in parallel each having in series therewith a solenoid 7, 8 and a rectifier 4, 5 arranged to hold the contacts closed against the bias after the operating solenoid is de-energized and until they are carrying no current, the contacts thus being opened in successive half-cycles of the A.C.
Patent GB-1451684-A (GB)
Title: Rotary printing machine
IPC: B41F21/10
Filed: 1974-01-18
Abstract: 1451684 Rotary presses; sheet-turning MASCHINENFABRIK AUGSBURG-NURNBERG AG 18 Jan 1974 [2 Feb 1973] 02593/74 Heading B6C Two printing units of a rotary press are connected by a transfer cylinder, the second impression cylinder being provided with two sets of co-operating gripper systems so that a sheet can be turned for printing on both sides. In one embodiment, a two-colour press includes respective printing units made up of forme cylinders 1, 2. Offset cylinders 3, 4 and impression cylinders 5, 6 with an intermediate sheet transfer cylinder 7. When printing on one side only a sheet 10, Fig. 1 (not shown), is conveyed by grippers 14 on cylinder 5, grippers 15 on cylinder 7 and grippers 20 on cylinder 6, each cylinder being provided with respective second rows of grippers 13, 16 and 18 for a second sheet; when it is required to print on the other side of the sheet, grippers 15 retain a sheet 10 past its delivery position to cylinder 6 until its trailing edge is engaged by grippers 17, Fig. 2; grippers 17 and 18 then swing towards each other and the trailing edge is transferred to grippers 18 while grippers 15 are released so that the sheet passes through the second printing unit in the opposite sense Fig. 4 (not shown). Air blast or suction devices 21 lift the sheet 10 away from transfer cylinder 17 and prevent setoff occurring, Figs. 3 and 4 (not shown).
Patent GB-796658-A (GB)
Title: Fluorescent lamps and powders
IPC: H01J61/44
Filed: 1956-01-27
Abstract: 796,658. Luminescent materials. ATELIERS DE CONSTRUCTIONS ELECTRIQUES DE CHARLEROI. Jan. 27, 1956 [Feb. 24, 1955; June 29, 1955], No. 2749/56. Drawings to Specification. Class 39(1). Luminescent material for discharge lamps of " daylight " tint consists of a calcined (at about 1170‹C. for 4 to 5 hours) mixture of CaHPO 4 , CaF 2 , MnCl 2 .4H 2 O, CaCOs and SbzOs, the mixture after calcination containing per mol. of P 2 O 5 -about 0À282 mol. CaF 2 , 0À02 to 0À1 mol. M.nCl 2 , 2À8 to 2À92 mols. of CaO and 0À002 to 0À02 mol. SbzOs, and the molar sum of all the metallic oxides and halides per mol. of P 2 O 5  being 3À215 (within 1 per cent). The molecular quantities of CaO and MnCl 2  can be in accordance with predetermined ratios. The CaHPO 4  can be prepared as described in Specification 787,361. The material can be used in low pressure mercury vapour lamps for excitation by radiation of 2537Š or in high pressure lamps for excitation by radiation of 3650Š. Emitted light corresponds to black-body tints " white 3500 " " white 4500." ' white 6500 '" or intermediate tints.
Patent GB-759134-A (GB)
Title: Variable capacitors
Inventor: EISLER PAUL
IPC: H01G5/38
Filed: 1952-02-01
Abstract: 759,134. Electric transducers. TECHNOGRAPH PRINTED CIRCUITS, Ltd. Jan. 30, 1953 [Feb. 1, 1952; June 13, 1952], Nos. 2757/52 and 14994/52. Class 40(1) [Also in Group XXXVI] In a variable condenser two electrodes 24, 25 are fixed side by side on one surface of a dielectric sheet 23, on the opposite surface are two arrays 26, 27 of closely spaced conductive strips, each array overlapping one of the electrodes, and a movable metal member 28 connects together variable numbers of strips of the two arrays thus changing the capacity of the condenser. Instead of effecting the connection of the strips by members 28, leads may be taken, one from each strip 26, 27 to an external point and the connection be effected thereat. If the remote ends of these leads are arranged to terminate in a line and a variable is caused to produce movement of a contact along the line, the capacity will depend on this linear movement. If the ends of the leads are arranged to terminated in a surface, the capacity value will give the measure of any conductive area placed on the surface. If the ends of the leads are sealed through the walls of an insulating tube, a mercury column can be caused to progressively connect the strips together as it advances along the tube in response to changes in temperature or some other variable such as gas or liquid pressure, or dimensional variation of a solid body under stress or strain.
Patent GB-812561-A (GB)
Title: Safety control means for gas burning appliances
Inventor: SMITH ARNOLD CHARLES DUNN
IPC: F23N5/12
Filed: 1956-01-27
Abstract: 812,561. Fluid-pressure servomotor control systems. DE LA RUE CO. Ltd., [formerly DE LA RUE & CO. Ltd., T.]. Jan. 25, 1957 [Jan. 27, 1956], No. 2793/56. Addition to 723,334. Class 135. Safety control means for gas - burning appliances comprises a normally closed pressure-operated cut-off valve 15, Fig. 1, a plurality of solenoid-operated valves, a pilot burner pipe 1b at earth potential and communicating with the gas supply through one of the solenoid valves 30b, an electrical system including the solenoids of the solenoid valves, electrically-operated pilot burner ignition means and a probe electrode 14 adjacent the pilot burner, operation of control means in the electrical system actuating two or more solenoid valves allowing gas to pass and be ignited by the ignition means whereby the pilot flame completes an electrical circuit through the probe to operate further control means for opening the cut-off valve. Cocks 3, 4 are opened and on pressing push-button switch L, Fig. 2, a circuit is completed through the contacts W1, YI, made contacts E, F in a control panel K and through solenoid valve 30a and an interrupter and igni.- tion transformer O whereby gas at burner 2a is ignited. A circuit is also completed through solenoid valve 30b whereby gas is ignited at the pilot jet 2b. A circuit through the probe 14 and a control panel electrical relay breaks the con-  tacts E, F to open the ignition circuit, de-. energize valve 30a, and switch off lamp 35 indicating that the circuit is connected. to the electric supply, makes contacts F, G and H, I and switches on lamp 36 indicating that a flame has been established. On releasing the pushbutton valve 30b remains energized through contacts F, G. Solenoid valve 32 in a weep pipe 8 from a chamber beneath the actuating diaphragm 21 of the cut-off valve 25 and solenoid valve 33 in a control pipe 11 leading from the diaphragm chamber of a control valve 9 to a heating appliance thermostat 10 are respectively closed and opened through contacts X1, Z1 of switch L, closed contacts F, G of the control panel and contacts S, U of a push-button switch M. On pushing in switch M contacts S, U are broken to close valve 33 and a solenoid valve 31 is opened through contacts R, T whereby mains gas at 1 flows through pilot pipe 1b, pipe 7 and valve 31 to beneath the diaphragm 21 to open the valve 25. On releasing switch M, contacts R, T are broken to close valve 31, valve 25 then being held open by mains pressure acting through valve stem passage 29, and contacts S, U are remade to reopen valve 33 whereby gas flows to the main burner 13 under the control of valve 9 and thermostat 10. Switch M and valves 31, 33 may be dispensed with, 33 being replaced by a cock and 31 by a manual valve connecting space 22 to the supply mains as shown in the parent Specification.
Patent GB-1004788-A (GB)
Title: Improvements in or relating to shoring for the sides of trenches
IPC: E02D17/08
Filed: 1963-04-22
Abstract: 1,004,788. Screw jacks. JOHNSTONE BROTHERS (ENGINEERING) Ltd., and A. B. BONE. July 22, 1964 [April 22, 1963], No. 2799/63. Heading B8J. [Also in Division E1] A screw-jack 38 for relatively spacing apart the opposed panels 10 of a trench shoring device, see Division E1E, is actuated by a chain and sprocket mechanism 42 ... 46, 50 under control of a lever 49, the members 44, 45, 46, 49 and 50 being detachably secured to the outer periphery of the shoring device by clamps 47. In a modification, see Fig. 3 (not shown), the jack is in the form of a tumbuckle rotated by a pawl-and-ratchet mechanism.
Patent GB-1284441-A (GB)
Title: Improvements in or relating to warp knitting machines
Inventor: CHISHOLM ANDREW ALEXANDER
IPC: D04B27/00
Filed: 1969-01-17
Abstract: 1284441 Knitting machines TMM (RESEARCH) Ltd 15 Jan 1970 [17 Jan 1969] 2894/69 Heading D1C In a warp-knitting machine the tension in the yarns 1 passing from the supply to the knitting elements is controlled by a resilient member 3 with a loading part 2 which engages the yarns and, as the tension increases and decreases, executes a closed loop. As shown, rail 2 is carried by spring assemblies 3 each of which comprises a strip of steel 5 bent into a circle and secured by a bracket 6 to the machine frame. Each spring 5 carries a rigid nose piece 8, e.g. of steel or nylon, on which tension rail 2 is clipped and the pressure of the yarns on rail 2 causes the rail to move in an asymmetrical closed loop. In another embodiment, two tension wires 12, 13 pass through the upper ends of pillars 14, 15 secured to spring 5 symmetrically with respect to a diameter passing through the point of attachment to bracket 6. Spring 5 may be elliptical. (For Figures see next column)
Patent GB-782095-A (GB)
Title: Improvements in or relating to electro-luminescent powders
IPC: H05B33/14
Filed: 1954-02-01
Abstract: 782,095. Electroluminescence. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Feb. 1, 1954 [Feb. 4, 1953], No. 2917/54. Class 39(1). Electroluminescent sulphide powders are prepared by subjecting the photo- or cathodelumniescent powdered material to treatment with copper or copper-containing compounds and/or gold or gold-containing compounds to form a layer on the outer side of each particle which is higher in copper or gold content than the interior of the particle. The starting material has a lattice built up from one or more of the elements of each of the groups (1) zinc and cadmium, (2) sulphur and selenium, (3) silver, copper, lead, manganese, scandium, gallium, indium, phosphorus, arsenic, gold, antimony, chlorine, bromine and aluminium, the atomic ratio of the elements of groups 3 and 1 being from 10<SP>-6</SP> to 5.10<SP>-2</SP>. The treatment may be by immersion of the powdered material in a solution of copper or gold compounds, e.g. a À001M solution of copper sulphate or auric chloride ; the particles being afterwards dried at 100‹-180‹C. In another method, the copper or gold is deposited by vaporisation in vacuo and the material may already be in layer form on a metallised support as for an electroluminescent plaque. In another alternative, a copper or gold plate is mounted just above the powder in an atmosphere of rare gas and a discharge is passed between the plate and an anode to volatilize the copper or gold, the powder being agitated. The electroluminescence may be enhanced by further heating of the powder at a temperature of between 400‹C. and 800‹C. for a period of between a few minutes and a few hours. The Specification contains seven examples of the various processes used. Specifications 782,096 and 782,097 are referred to.