baber/WOPTO huggingface dataset:
Patent GB-693181-A (GB)
Title: Improvements in and relating to servo systems
Inventor: PARTON CHRISTOPHER GEORGE
IPC: G05D3/12
Filed: 1950-09-12
Abstract: 693,181. Electric control systems. METROPOLITAN - VICKERS ELECTRICAL CO., Ltd. Aug. 16, 1951 [Sept. 12, 1950], No. 22446/50. Class 40 (i). In a positional control system the alternating error signal is fed through an A.C. amplifier to operate an A.C. motor. the amplifier including a modulator stage having input circuits energized jointly in accordance with the outputs of separate circuits, one of which is an A.C. circuit directly responsive to the A.C. input signal and the other is a D.C. circuit responsive to said input signal after rectification and includes differentiating means. As shown, a Selsyn transmitter T controls through a Selsyn receiver R, the position of a load driven bv a two phase motor 1. The transmitter rotor 7 and the reference phase 2 of the motor are fed from the same A.C. supply 8, 9, The "error" voltage developed in the receiver rotor 12 is fed through a potentiometer 16 to transformer 15, the secondary 17 of which applies the error voltage in push-pull to the grids of balanced modulator triodes 21, 22 in series with an A.C. bias derived from the secondary 25 of the transformer 10 and applied to the centre tap of secondary 17. A portion of the error voltage is rectified in the phase sensitive rectifier 28-31 the reference phase of which is fed from secondary 32 of transformer 10. The rectified error signal is filtered at 33, 34, 35, differentiated at 36, 37, 38, 39 and then also fed in push-pull, to the modulator grids, in series with the biasing A.C. from the winding 25 which is connected to a tap on a potentiometer 40 provided for initial equality adjustment of the derived voltages under steady state - conditions. The A.C. bias signal from winding 25 modulated by both the error voltage and its first derivative are thus applied to the modulator grids. The modulator triodes are transformer coupled at 48 to a balanced amplifier stage 51, 52 the resistorcapacitator combinations 54-56, 55-57 feeding back a portion of the amplifier input negatively to the modulator grids to reduce drift. After further amplification in a balanced stage 64, 65 the resultant control signal is fed in known manner by a transformer 69 to the control phase 3 of the servomotor. Other forms of drift-free amplifiers may be used e.g. of the vibrating reed type. The error signal may, alternatively, be injected at a later stage in the amplification chain than the derivative signal.
Patent GB-446649-A (GB)
Title: Internal combustion injection engine
IPC: F02D9/00
Filed: 1934-08-01
Abstract: 446,649. Fuel - injection pumps. BIRKIGT, L., Rue Du Capitain Guynemer, Bois-Colombes, Seine, France. Aug. 1, 1934, No. 22467. Void [Abridged as open to inspection under Sect. 91 of the Acts, Jan. 7, 1936]. [Class 102 (i)] [See also Group XXVII] In an internal-combustion engine having a fuel-injection pump 2 the delivery of which is regulated by rotation of the pump piston 6 by means of a rack 9, the pump piston is provided with a head 8 which works over a fuel-admission passage 7, the injection commencing when the upper edge of the head 8 closes the passage 7, and ending when the lower edge uncovers the passage, through which the fuel is then byepassed by means of a passage through the head 8. The duration, and the advance and delay of the beginning and end of the injection period, are thus variable according to the slope of the upper and lower edges of the head 8.
Patent GB-826757-A (GB)
Title: Apparatus for scrambling or coding communication transmissions
IPC: H04L9/38
Filed: 1956-07-20
Abstract: 826,757. Magnetic recording/reproducing apparatus. BOLKOW, L. July 20, 1956 [July 23, 1955], No. 22515/56. Class 40 (2). [Also in Group XXXIX] In a secret transmission system (see Group XXXIX) of the type using magnetic recording means at both the transmitting station and the receiving station, the relative speed of the recording medium and one of the sound heads being synchronously varied at each station under the control of a detector following a cam surface, this cam surface is composed of a plurality of cams of which the sequence may be altered as required. As shown in Fig. 1, the recording medium is in the form of a rotating cylinder 4, and a lever 16 carrying one or more sound heads moves in response to the movements of a second lever 17 carrying a roller 20 which follows a cam surface formed by successive projecting portions 19<SP>1</SP> on the peripheries of rotating discs 18. The discs 18 are set to the required positions by means of a dial 29, Fig. 5, a nut 36 being caused to move along a threaded spindle 37 to engage the next disc at each release of the dial. In suggested modifications (not shown), only a selection of the discs 18 is used at any one time, this selection possibly being changed automatically after each revolution, or the whole periphery of each disc 18 is used, the discs being driven one at a time in a predetermined sequence.
Patent GB-745569-A (GB)
Title: Improvements in or relating to ventilators
Inventor: WHITE GERALD RICHARD
IPC: B60J7/16
Filed: 1953-08-14
Abstract: 745,569. Closable apertures in hoods. DUPLE MOTOR BODIES, Ltd. May 17, 1954 [Aug. 14, 1953], No. 22528/53. Class 108 (1). [Also in Group X] A ventilator comprises a panel 11 normally closing an opening 12 in the roof of a coach and is provided with lifting and locking devices, whereby the panel may be opened at either or both ends. The lifting and blocking devices each include two hook elements 27 secured to the frame 14 of the opening 12 to receive two cylindrical trunnions 28 mounted on brackets 29, 40 beneath the frame 18 of the panel 11 to provide a hinge arrangement along the pivoting side, the trunnions at an open side being lifted out of the hooks 27. A screw-adjusted lifting and locking device 30 is also provided at each end and comprises a threaded rod 31 pivoted at 32 to brackets 33 mounted on the underside of the panel 11 and engaging a threaded barrel 38 rotatably mounted in a collar 35 pivotally connected at 36 to brackets 37 secured to the frame 14. Each bracket 40 is extended downwardly to project through a slot 41 in the respective hook element 27, a projection 42 on the bottom of the bracket providing a stop for limiting the upward displacement of the panel. In a modification, Fig. 9, each lifting and locking device 30 is replaced by a toggle device 43, which comprises toggle levers 44 connected by a hand rail 52. Each toggle 43 comprises an arm 45 which is pivoted at one end 46 to a bracket 47 mounted on the underside of the panel frame 18 and at the other end, at 51, to a shorter arm 48 having its other end pivoted at 49 to a bracket 50 secured to the frame 14. In order to prevent the panel 11 from being opened at both ends, when fully open at one end, a limiting device, Fig. 12, is arranged along each longitudinal side of the panel 11 and the frame. Each limiting device comprises a plate 56 secured to the underside of the panel 11 and having a pin 57 at its lower end which engages in a slot 58 in a plate 59 secured to the side rail 15 of the frame 14. This type of limiting device may also be fitted to the arrangement illustrated in Fig. 6, similarly the limiting means illustrated in Fig. 6 could be incorporated in the arrangement according to Fig. 9. In a preferred embodiment a lifting and locking device 30 is arranged at the front end of the panel and a toggle device is arranged at the other end.
Patent GB-1013693-A (GB)
Title: Control apparatus for door locks
IPC: E05C9/18
Filed: 1962-06-12
Abstract: 1,013,693. Control of motors. WILMAR CASTLE CO. June 12, 1962 [Sept. 21, 1961], No. 22600/62. Heading H2J. [Also in Divisions E2 and F2] The door of a steam sterilizer is operated by a reversible electric motor 46, the opening and closing cycles being started by a manual switch 95. A pressure switch 124 prevents the door from being opened if the pressure inside the sterilizer exceeds a predetermined safe level, and the opening cycle is stopped by a limit switch 102 controlled by the operating mechanism (see Divisions E2 and F2). When the switch 95 is moved to "close" the motor circuit is completed through switches 104, 106 and the door is rotated from its fully open position to an ajar position on its seating. Hook clamps are then moved to engage the door and force it against its seating, these hooks carrying a switch 111 which is closed only if the hooks are properly engaged with the door. The switch 104 is opened when the door reaches the ajar position, so that if the hooks are properly engaged the motor circuit remains unbroken until the door is fully clamped, when a limit switch 106 opens. This switch also closes the circuit through the controls 108 (not described) which regulate the sterilizing operations. The closing door may be arrested in the ajar position by opening a manually controlled switch 109. A circuit breaker 122 opens if the motor stalls as the result of an obstruction in the path of the door or the hooks.
Patent GB-379496-A (GB)
Title: Improvements in fluid couplings or clutches
IPC: F16D31/06
Filed: 1931-08-11
Abstract: 379,496. Hydraulic transmission of power. CLAYTON, J., Solsbro House, Chelston, Torquay. Aug. 11, 1931, No. 22658. [Class 69 (ii).] One part of a hydraulic coupling has an annular member projecting into an annulus on the other part, elements mounted so as to be slidable in grooves, and a controllable byepass. In the form shown in Figs. 2 and 3, the driving shaft 1 carries an annular member 3 projecting into the space between bodies 4, 8 carried by the driven shaft 2 ; the member 3 has radial holes accommodating balls 6, which engage the outer periphery of the body 4 and grooves 7 extending partly around the inner periphery of the body 8. Byepasses 9 controlled by screws 12 and centrifugally closed valves 10 are provided, the valve springs being of different strengths, if desired. In another form the control is effected by a manually operated valve with portions 14a, 14b, 14c, Fig. 5, arranged to close the byepasses consecutively in over. lapping sequence. In further modifications, byepasses 9d, 9e, Fig. 9, are oppositely arranged and controlled either by simultaneously operated slidable valves 14d, 14e, or by rotary valves. In all forms, the balls may be replaced by plungers which may have heads 6c, Fig. 12.
Patent GB-976883-A (GB)
Title: Improvements in or relating to the manufacture of organic flourine compounds
Inventor: CHAPMAN JAMES
IPC: B01J23/26
Filed: 1962-06-13
Abstract: Black chromium oxides having atomic ratios of oxygen to chromium of greater than 1.5 : 1 but less than 3 : 1 are prepared by heating chromium trioxide, chromic hydroxide, chromic carbonate or any other readily decomposable salt of chromium in air or oxygen, care being taken in the latter preparations that the chromic salt is not heated to such a high temperature as to produce the green rather than the black oxide.  A preferred catalyst is one prepared by taking a black chromium oxide catalyst, prepared for example by said heat treatment of chromium hydroxide, heating this material in the presence of hydrogen at about 450 DEG  C., and then heating in the presence of oxygen at about 450 DEG  C., the cycle being repeated several times, the last step always being heating in the presence of oxygen.  In examples:  (1) Cr(OH)3.H2O is heated to give a black powder having a ratio O : Cr\sU 1.8 : 1; (2) technical CrO3 gives a product of empirical formula Cr2O5; (5) the catalyst of example (1) is heated alternately in the presence of hydrogen and of oxygen; (6) analytical grade CrO3 gives a product of ratio O : Cr = 2.7 : 1 which is largely a mixture of Cr2O5 and Cr3O8.ALSO:Fully halogenated chlorofluoroalkanes are prepared by reacting, in the vapour phase, a fully chlorinated alkane or alkene containing not more than 2 carbon atoms with hydrogen fluoride in the presence of a black chromium oxide catalyst, which is unsupported or supported on an alumina-free carrier, wherein the atomic ratio of oxygen to chromium is greater than 1.5:1 but less than 3:1, and recovering as reaction products fully halogenated chlorofluoroalkanes, the reaction being conducted in the presence of chlorine when the organic reactant is a fully chlorinated alkene, Specified products are CFCl3, CF2Cl2, CF3Cl and CF4 (by-product) when CCl4 is used as starting material, and CF2Cl.CF2Cl and C2F5Cl when C2Cl4 is used. Examples are given, products obtained in addition to the above being CF3.CFCl2, CF3.CCl3 and C2F6 (by-product).  A comparative example describes the reaction between C2Cl4, chlorine and hydrogen fluoride in the presence of a green chromium oxide catalyst to give CF3.CF2Cl, CF2Cl.CF2Cl, CF3.CFCl2 and CF3CCl3.
Patent GB-345914-A (GB)
Title: Improvements in x-ray tubes
IPC: H01J35/10
Filed: 1930-07-28
Abstract: 345,914. Alternating-current motors. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13A, Emmasingel, Eindhoven, Holland. July 28, 1930, No. 22709. Convention date, Aug. 2, 1929. Addition to 286,436, [Class 35, Dynamo-electric generators &c.]. [Class 35.] In a Rontgenray tube having an anticathode forming the rotor of a motor according to the parent Specification, the anticathode is displaceable relatively to a fixed member, which, when in thermal contact with the anticathode, removes heat therefrom, the thermal contact being broken during rotation and maintained closed at rest. As shown, the anticathode consists of an iron part 11 and a copper part 9 screwed together and enclosing a copper sleeve 14 formed with a shoulder 23. A spindle 15 of iron-chromium alloy has an enlarged conical head 17 closely fitting in the anticathode, and contains a tube 19 supplying a cooling liquid, cushions 12, 13 in two or more parts, formed of a mixture of copper and graphite, are secured in the anticathode, and bear on the spindle, the axial movement being limited by the shoulder 23. A helical spring 21 bears on the part 11 and the cushion 13. The part 11 is so arranged that when the circuit is closed through the windings 6 of the stator, the rotor is moved axially against the action of the spring and away from the head 17. In a modification the spring is omitted and the anticathode falls by gravity on the head when the circuit is opened. The inner surface of the envelope may have a conducting coating to prevent the formation of an electric-field in the air-gap of the motor.
Patent GB-150995-A (GB)
Title: Improvements in or relating to apparatus for stabilising bodies exposed to external forces
IPC: G01C19/44
Filed: 1920-07-30
Abstract: 150,995. Optische Anstalt C. P. Goerz Akt.-Ges. Sept. 10, 1919, [Convention date]. Gyroscopic apparatus.-Means for stabilizing, in a vertical plane, bodies such as aircraft cameras exposed to external forces, comprise two devices for controlling restoring forces, one being a pendulum and the other a gyroscope which is free to process about only one axis, the said axis and the axis of rotation of the gyroscope lying in the plane of oscillation of the pendulum or in a plane parallel thereto. The body 1 to be stabilized is pivoted on a spindle 3 carried by the Cardan ring 2, a pendulum 4 being also mounted on the spindle. In a frame 5 rigidlv secured to the body 1 is a gyroscope 6 which is free to precess about an axis 7 and rotates on an axis 8. The restoring- means comprise solenoids of which the cores 9a, 9<b>, 10<a>, 10<b>, are secured to the body 1, the coils being secured to the frame 20. The pendulum co-operates with contacts 13 to energize one pair of solenoids, the other pair being energized, when precession of the gyroscope occurs, by contact rollers 15 moving over a conducting-ring 14 having an insulating-segment 16. The arrangement is such that when the body 1 is pulled over by the solenoid 9<a>, the resulting precession of the gyroscope causes the solenoid 10<b> to be energized. Magnets 17 are carried by the gyro-casing to compensate for the directional force of the gyro-axis due to the earth's rotation. A second and similar apparatus may be used to stabilize the body 1 about an axis at right-angles to 3-3.
Patent GB-428851-A (GB)
Title: A method of preparing natural ground for sowing or planting vegetation
Filed: 1933-08-17
Abstract: A method of preparing natural ground for the reception of seeds or plants consists in burning rings, spots, or confined areas in the vegetation thereon by means of an open mechanically controlled flame. The ground may be scratched or raked at the same time by a tool projecting in front of the burner and supporting it during the burning operation.  The burning-apparatus used may comprise a fuel container carried on the back of the operator and a burner carried on a control bar and supplied with fuel from the container through a flexible pipe.  The fuel may consist of hydro-carbon oil or acetylene or other oil or gas.
Patent GB-533304-A (GB)
Title: Improvements in or relating to the spinning of molten organic filament-forming compositions
IPC: D01D5/08
Filed: 1939-08-09
Abstract: 533,304. Artificial filaments &c. DU PONT DE NEMOURS & CO., E. 1. Aug. 9, 1939, No. 23028. Convention date, Aug. 9, 1938. [Class 2 (ii)] Artificial filaments, ribbons, and the like, are obtained by extruding a molten filamentforming composition and passing a cooling medium with a substantially straight-line flow across the filaments while they are being transformed from the molten to the solid state. As shown in Fig. 1, molten material is extruded through a spinneret 11 to form a bundle of filaments 12. The filaments pass a short distance through the atmosphere and then pass through chamber 13 which is provided with cooling-air inlets 15, 17. A screen 19 is provided so that the air has a straight-line flow as it passes across the path of the filaments. If desired several parallel screens may be provided in front of screen 19 and the streams of air entering at 15 and 17 may be kept separate by the provision of a horizontal partition. Another screen may be provided on the opposite side of the chamber 13. As shown in Fig. 3, the chamber 55 is divided into sections by the partitions 57, 59. Cooling-air is directed in straight-line flow on to the filaments by means of the inlets 65, 66, 71, and screens 67, 69, 75. The orifices of the spinneret may be arranged so that each filament is exposed to the direct flow of cooling air. In an example, polyhexamethylene adipamide is melted in a chamber provided with a melting grid. The molten mass is passed through a filter screen and then extruded in apparatus as shown. A magnesium carbonate insulating ring is fastened between the spinneret and the cooling chamber in order to insulate these parts from each other. The spinning speed may be 3,000 feet per minute. Synthetic linear polyamides, polyesters, polyethers, polyacetals, or mixed polyamide-polyesters, or ethylene polymers, vinyl polymers, polystyrene, polyacrylic acid derivatives, or cellulose derivatives, may be used as filament-forming substances. The compositions may contain dyes, pigments, delustrants, resins, or plasticizers. Instead of using screens of fine mesh for securing straight-line flow, fabrics, glass-wool screens, or other devices may be used. Specification 471,590 is referred to.
Patent GB-950243-A (GB)
Title: Liquid-dispensing medium for marking instruments
IPC: B43K8/02
Filed: 1962-06-15
Abstract: 950,243. Pad applicators. CARTER'S INK CO. June 15, 1962 [June 23, 1961], No. 23036/62. Heading A4K. [Also in Division B6] The reservoir of the marking instrument shown comprises a bundle 16 of substantially parallel compacted elongated filaments defining therebetween a multiplicity of longitudinally extending capillary flow paths capable of retaining a liquid. The filaments are cellulose acetate or rayon acetate tow, approximately 0.001 inch thick, and compacted to a density preferably in the range 0.1 to 0.3 gm. per c.c. To facilitate handling and the insertion of the bundle into the casing 10, the surface filaments are thermally bonded together, as indicated at 26, Fig. 3 (not shown. A felt nib 18 is satisfactory for dispensing dyed marking liquids such as ink, but the bundle 16 may be further compacted to form a nib, Fig. 4 (not shown), which is satisfactory for dispensing pigmented liquids or paint.
Patent GB-895694-A (GB)
Title: Improvements in and relating to the construction of tables, benches and the like
IPC: A47B87/00
Filed: 1959-07-04
Abstract: 895,694. Knockdown tables. BIDDULPH INDUSTRIES Ltd., BIDDULPH, C. L., and REASON N. P. June 29, 1960 [July 4, 1959], No. 23060/59. Classes 52(2) and 52(3) A table of knock down construction is formed by a table top 12 to which are fixed end tubes 11 and side tubes 10 with aperture at the end to receive spigots 15 or 19 fixed to the leg units. Two types of leg unit each having two upright legs 13 or 16 connected by a cross piece 14 or 17 are used at the end of the table or when connecting two tables respectively, the connecting leg unit also having a horizontal member 18 to which the spigot 19 is attached. The leg units are held in place by clamping members 26 comprising an angle bar 21 fixed to a threaded draw bar 23 on which a collar 24 carrying angle bar 22 slides. The tables may be connected together in any way to form a table of any required size and shape.
Patent GB-262857-A (GB)
Title: Improvements relating to cooking stoves
IPC: F24B1/20
Filed: 1925-09-16
Abstract: 262,857. Maver, J. Sept. 16, 1925. Grates; cooking-stoves; joints and connections. -In a collapsible cooking-stove of the kind comprising hingedly-connected walls 1 - - 4 and a bottom grate 6, which locks the walls in erected position, the free ends of the walls 1 and 4 are connected together by T-slots 9 near the edge of the one engaged by T-heads 8 projecting from the edge of the other, the arrangement being such that the heads are held from disengagement from the slots when the bottom 6 is in position.