baber/WOPTO huggingface dataset:
Patent GB-578901-A (GB)
Title: Improvements in generators of large pulses of electric current
IPC: B23K11/24
Filed: 1944-07-12
Abstract: 578,901. Supply systems for resistance welding. GENERAL ELECTRIC CO., Ltd., and FRIEDLANDER, E. July 12, 1944, No. 13317. [Classes 38 (ii) and 38 (iv)] A pulse generator, e.g. for welding operations, comprising a rectifier 10 which is supplied through a transformer 11 from an A.C. source and which is adapted to supply D.C. to the primary 16 of an output transformer 17, the secondary winding (not shown) of which supplies the current pulse to the load on current variation in the primary is characterised by the fact that the rectifier transformer 11 is tuned to resonance at the frequency of the A.C. source and thus serves as an energy-storing device, and also by the fact that control means are operable for " making " the D.C. circuit between the rectifier and the output transformer 17, thereby causing the stored energy to be applied to the transformer 17 as a pulse. The primary windings 12 of the rectifier transformer are connected through condensers 13 to obtain the required resonance. A group of auxiliary anodes 19 is connected through auxiliary secondary windings 20 and a choke 21 to an auxiliary primary winding 22 of transformer 17, the other terminal of which winding is connected to the rectifier cathode 18. This auxiliary primary 22 keeps the core of the output transformer almost completely saturated until the pulse is applied, when the core becomes saturated in the opposite sense, so that the flux alteration is substantially twice the saturation flux. The control grids 23 are normally supplied from the negative side of a battery 26, but when a pulse is desired, a source of positive grid bias 25 is inserted in series. This may be achieved by opening a switch 24, or, if periodic pulses are desired, by the circuit shown in Fig. 2, so that as the voltage increases in the primary 12, the D.C. output of rectifier 27 increases rapidly until the grids 23 become positive, at which point the main rectifier 10 operates, thereby supplying a pulse to transformer 17 and allowing the voltage in the primary 12 to fall.
Patent GB-494027-A (GB)
Title: Improvements relating to bearings
IPC: F16C37/00
Filed: 1937-05-11
Abstract: 494,027. Cooling bearings. LAKE, A. T. May 11, 1937, No. 13354. [Class 12 (i)] A bearing brass for a fabric printing machine roller consists of a hollow bush a having a single longitudinal division extending along the greater part of its interior length to form two water passages b extending back and forth within the brass and having nipples d for the inlet and discharge of cooling water at one end of the brass. A quadrant plate e<1> having an oil groove f therein may be secured to the end of the brass, the nipples d extending therethrough.
Patent GB-133897-A (GB)
IPC: F24F7/06
Abstract: 133,897. White, A. E., (Schelhammer, H.). March 26, 1919. Forced ventilation.-Fresh air supplied for ventilation withdraws air from the apartment ventilated, the resuming mixture being supplied to the apartment. The points of withdrawal and supply are at different levels so as to cause a circulation through the zone of occupancy. As shown in Fig. 1, air supplied by a fan is cleaned. attemperated, and humidified in an apparatus 2, and in passing the injector nozzle 4 withdraw air from the apartment through an openuig 6 controlled by a damper 7. The resulting mixture enters the apartment at 8. Fig. 3 shows an arrangement in which air supplied through the pipe 9 draws air through the vertical conduits 10 by means of injectors in their upper ends. To increase the injector action, the air may be caused to whirl in the conduit. Fig. 6 shows spiral vanes 13, 14 for this purpose, which may be either on the interior of the injector or conduit, or both, or on a conical member 16, Fig. 7.
Patent GB-1464549-A (GB)
Title: Underwater solids collecting apparatus
IPC: E02F7/04
Filed: 1973-03-20
Abstract: 1464549 Air lift pumps INDUSTRY SECRETARY OF STATE FOR 20 March 1974 [20 March 1973] 13415/73 Heading F1R [Also in Division E1] A dredger comprises a hollow structure 1 having two intakes 4, an outlet 3 and a hopper 5. In operation the dredger is positioned on the bed by flooding the hollow structure after which an air lift pump induces sufficient water into the structure 1 through intakes 4 to carry over solid from the bed into the hopper. The air lift pump is formed by pumping air into the structure through an inlet 2 and allowing the air to pass out through the outlet 3. When the hopper is full, the outlet 3 is closed and air is continued to be pumped into the structure so that the dredger becomes buoyant and rises to the surface. A jet pump or centrifugal pump may also be used to induce solids into the hopper.
Patent GB-135191-A (GB)
IPC: A01C9/04
Abstract: 135,191. Lippitz, W. Oct, 16, 1918, [Convention date]. Potato planters.-In a potato-planter having a planting-wheel in which distributing-chambers are formed by radial transverse partitions h and chord-like guide surfaces t, special means are provided for delivering the potatoes into the distributing-chambers. The wheel is made in the form of a hollow cylinder into which projects a cylindrical part. o of the box for holding the potatoes. The potatoes pass, one at a time, between angular blades b on the wheel, and are pushed by them through an opening in the part o on to surfaces s in the distributing-chambers. The distances between the blades themselves and between the blades and the cylinder o are simultaneously adjusted by turning the blades about their fixing- screws a. The blades b may be made extensible, and the cylinders o may be adjustable about the spindle w.
Patent GB-1112291-A (GB)
Title: Improvements in hydraulic braking systems
Inventor: FINEMAN HAROLD
IPC: B60T13/565
Filed: 1964-04-02
Abstract: 1,112,291. Fluid pressure brakes. GIRLING Ltd. 14 June, 1965 [2 April, 1964], No. 13549/64. Heading F2F. An hydraulic braking system comprises a booster in which a piston 12 in a primary cylinder 10 is actuated by a pedal to produce a fluidpressure which is transmitted to a secondary cylinder 25, feeding wheel brakes of a vehicle, in which a piston 26 is actuated by a booster energized by a rack 15 passing through the primary cylinder. As shown, the piston 12 is actuated through a rod 38 and fluid displaced from the primary cylinder 10 actuates the brakes on one pair of wheels through a pipe 39 and is permanently connected by a pipe 41 to the secondary cylinder 25 which is connected to another pair of wheel brakes. Leftward movement of the piston 12 and piston-rod 15 causes a valve seating 17 to close on a valve member 18 which is lifted from a seating 19 to admit air at atmospheric pressure to the right-hand side of a vacuum suspended piston 21 which then moves leftwards to-move the piston 26 displacing fluid from the secondary cylinder 25. Fluid in the system can be made up from a reservoir 42 communicating with the secondary cylinder through a passage 43 which is closed by a valve 44 when the piston 26 is moved leftwards. In another embodiment, Fig. 1 (not shown), the piston 12 is actuated by fluid pressure from a master cylinder.
Patent GB-640754-A (GB)
Title: Scissors with handles of thermoplastic material
IPC: B26B13/20
Filed: 1948-05-19
Abstract: 640,754. Scissors. BRADLE, J. May 19, 1948, No. 13564. Convention date, June 3, 1947. Drawings to Specification. [Class 30] The handles of a pair of scissors are formed from thermoplastic material reinforced by tang-like extensions extending rearwardly from the blades.
Patent GB-496922-A (GB)
Title: Improvements in and relating to spring arrangements for the tools of motor driven machines for working the soil
IPC: A01B33/14
Filed: 1938-05-06
Abstract: 496,922. Metallic springs. DUFOUR, L. May 6, 1938, No. 13576. [Class 108 (iii)] [Also in Group I] An agricultural implement is provided with a rotary tool which is mounted within a helical spring so that when an obstruction is encountered the tool moves backwards and compresses the spring. The tool is so mounted that when the obstruction is passed the tool is free to move to its normal position independently of the spring. Figs. 1 and 2 show a tool 15 mounted freely on a shaft 20 carried in bearings 23 in arms 18 through which the ends of a spring 12 pass. The ends of the spring also pass through apertures in lugs 25 on a holder 11 carried on the main shaft 10. The middle part of the spring is formed as a loop 14 which serves as a stop for the tool but in which the tool is freely movable. The ends 16 of the loop are close together and extend parallel to one another as shown at 19. The end convolutions of the spring pass over fixed projections 21. When the tool meets an obstruction it tensions the spring and moves backwards to a position B shown in Fig. 1. When the obstruction is passed the spring and tool return to their normal positions but the inertia of the tool causes it to continue its forward movement till it is stopped by the braking action of the parts 16, 19 of the spring. Fig. 3 shows a modification in which the main shaft 10 as well as the shaft 20 is situated within the spring. The holder 11 forms an additional positive stop for the tool. Fig. 6 shows a further modification in which resilient arms 27 attached to a stop 26 serve as a brake for the tool 15.
Patent GB-1277986-A (GB)
Title: Improvements in or relating to an electrohydraulic brake control system
Inventor: ALLEN LAIRD ROBERT JR
IPC: F16D65/28
Filed: 1970-03-20
Abstract: 1277986 Electrohydraulic systems; disc brakes; adjusting brakes for wear WESTING- HOUSE ELECTRIC CORP 20 March 1970 13595/70 Headings F2E and F2F A spring applied electrohydraulically released brake system 10 for a vehicle disc brake assembly 38, 40, 42 comprises a master cylinder 24 and a slave cylinder 30 in communication, to form an hydraulic circuit, the master piston 22 in the master cylinder 24 incorporating a valve 50 for cutting off flow of fluid between a reservoir 26 and the circuit, and a solenoid 14 adapted to operate the master piston 22 to apply pressure to the hydraulic circuit to move brake shoe 40 away from brake disc 42 against the force of a load spring 44, and release the brake. The solenoid 14 acts on an armature 16 through a gap 18 to move a thrust pin 23 to the right; a metal skin 20 is situated in the gap 18; these components may be formed as in Fig. 2 (not shown). As the master piston 22 is moved to the right by the thrust pin 23 the valve 50 is closed and the circuit pressure builds up to release the brake: as the brake shoe 40 wears the amount of fluid trapped in the circuit is reduced by the slave piston 31 forcing fluid back into the reservoir 26. Between the master cylinder 24 and the slave cylinder 30 the circuit is split into two branch conduits 35, 36 each containing a respective unidirectional valve 33, 34, which valves 33, 34 allow fluid flow in one and respectively opposite directions to thereby maintain a minimum pressure in the slave cylinder 30. In the event of a loss of pressure in the system causing the brakes to be applied a warning light may give indication to the vehicle operator. Alternatively a recycling circuit 60 may be used to automatically replenish the circuit in the event of a pressure drop. A pressure sensing chamber 65 acts to close contacts 63, 64 of a pressure sensitive switch 62. Closure of contacts 63 causes illumination of a warning lamp 71, and closure of contacts 64 causes solenoid 74 of a time delay relay 76 to close normally open contacts 75 and solenoid 78 of a time delay relay 79 to open normally closed contacts 80. Current is thereby cut off from a brake control means 68 and from solenoid 14, and the master piston 22 moves to the left, the valve 50 opens and the hydraulic circuit is replenished. This recycling operation is continued until sufficient pressure is present in the system to hold the brakes released. Brake shoes 40 may be applied to both sides of the disc 42, and the system is described as being particularly applicable to track vehicles.
Patent GB-354751-A (GB)
Title: Shake mechanism particularly applicable for fourdrinier paper machines
IPC: D21F1/18
Filed: 1930-05-02
Abstract: 354,751. Linkwork. HORNBOSTEL, L., 720, Church Street, Beloit, Wisconsin, U.S.A. May 2, 1930, No. 13617. [Class 80 (iii).] A shake mechanism having means to vary the amplitude of the shake, applicable to a Fourdrinier papermaking machine, comprises a fixed crank shaft 22 connected by a bifurcated rod 27 to a cross pin 29 carrying a transmitting link 31 pivotally connected to a pin 32 on the arm 21 of the rock shaft 15, which transmits the motion to the machine. The pin 29 carries at each end a link 34 pivoted at the upper end to the end of an arm 36 of a yoke frame 37, mounted on fixed pivots 38. The yoke frame is adjusted about these pivots to vary the amplitude of the shake by a screw 41 and nut 44 turned in a fixed socket by a hand-wheel 49. When the frame 37 is adjusted to bring the upper pivots of the links 34 coaxial with the pin 32 the amplitude of the shake is zero. Movement of the pivots away from the axis of the pin increases the amplitude of the shake. The arrangement is such that all the transmitting parts are of fixed length and all the bearing parts are annular.
Patent GB-171714-A (GB)
Title: Improvements in and relating to seats or chairs for cinemas, theatres, concert hallsand the like places of entertainment
IPC: A47C7/58
Filed: 1920-05-19
Abstract: 171,714. Jowett, R. May 19, 1920. Sliding and folding seats; seat-backs. - Chairs for cinemas, theatres, concert halls, &c. are provided with tilt-up seats which are slidable to a forward position when in use. The seats 2 are pivoted on horizontal rods 4 carried by runners 3 carrying antifriction rollers 6 working in downwardly inclined slots or grooves 7 of the side brackets 5 which may be common to two adjacent chairs, the rear rollers 6<a> being preferably mounted on the rods 4. Arm-rests 12 are mounted on supports 10 secured to the brackets 5. The back 14 is carried on arms 15 pivoted at 16 to the rear ends of the bars 3, and is kept vertical when the seat is unoccupied by means of a flat spring 17, or a spiral spring, or a counterweight with or without springs. The sliding seat may be pushed back to make room for passers-by without the user rising. A non- swinging back may be used.
Patent GB-1104803-A (GB)
Title: Improvements in removable cylinder liners for internal combustion engines
IPC: F02F1/00
Filed: 1965-03-31
Abstract: 1, 104, 803. Cylinder liners. REGIE NATIONALE DES USINES RENAULT. March 31, 1965 [April 1, 1964], No. 13768/65. Heading F1B. A cylinder liner for an engine with a light metal cylinder block comprises an inner ferrous metal sleeve 1 and an outer light metal backing sleeve 6 of length substantially equal to the piston stroke. The sleeve 1 may have a rib 3 adapted to engage a shoulder in the cylinder block, or the sleeve 6 may directly engage the shoulder.
Patent GB-594258-A (GB)
Title: Improvements in contact arrangements applicable to electric follow-up switches
IPC: G05B11/01
Filed: 1945-06-01
Abstract: 594,258. Hunting switches. PRECISION DEVELOPMENTS CO., Ltd., and OLAH, G. June 1, 1945, No. 13864. Addition to 556,288. [Class 38(v)] [Also in Group XXXVIII] In a modification of the follow-up switch described and claimed in the parent Specification, the contacts associated with the contact-carrying members and the additional member or members are constituted by intermeshing gear wheels, 24-27. The gear wheels 25, 26, are relatively insulated, are mounted on a common shaft, and have their teeth relatively offset by a fraction of the pitch so that when the driving wheel 27 is rotated clockwise, the backlash between it and wheel 26 is taken up and contact is made between the two wheels. Continued movement causes wheel 25 to contact the driven wheel 24. Counterclockwise movement of wheel 27 causes it to contact wheel 25 and wheel 26 to contact 24. The backlash between the teeth is greater than the amount by which the teeth of wheels 25, 26 are offset. The switch may control a servomotor and brake as in Specification 556,287 and arc quenching means such as those described in Specification 594,256 may be provided. Specification 594,257, [Group XXXVIII], also is referred to.
Patent GB-563623-A (GB)
Title: Improvements in or relating to cathodes for electron discharge devices
IPC: H01J1/14
Filed: 1942-10-03
Abstract: 563,623. Discharge lamps. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Oct. 3, 1942, No. 13905. Convention date, Oct. 3, 1941. [Class 39 (i)] [Also in Group II] A cathode, particularly suitable for mercury vapour electron discharge devices, comprises a core of nickel or nickel with up to 50 per cent by weight of cobalt with a coating of an alkaline earth, such as barium oxide or a mixture of barium and strontium oxides, and includes small amounts of two reducing agents so chosen that upon activation an interface will be produced such that said coating will be firmly bonded to the core and undesired cooling of the cathode by heat radiation will be kept low or prevented. The core may consist of 0.05-0.30 per cent silicon, 0.10-0.40 carbon, and the balance substantially pure nickel or nickel with up to 50 per cent cobalt.
Patent GB-348866-A (GB)
Title: An improvement relating to the purification of sulphuric acid
IPC: C01B17/94
Filed: 1930-05-06
Abstract: Sulphuric acid having a concentration of higher than 60 per cent is freed from nitric acid constituents by adding a solution of sulphur dioxide in water or sulphuric acid and passing a current of indifferent gas, such as air or flue gas, through the resulting mixture at a raised temperature, say 100-200 DEG  C.
Patent GB-1093087-A (GB)
Title: Hydraulic system
IPC: F15B17/02
Filed: 1965-04-02
Abstract: 1,093,087. Power assisted steering mechanism. T.R.W. Inc. April 2, 1965 [April 2, 1964], No. 14047/65. Heading B7H. [Also in Divisions F2 and G3] An hydraulic servo-system for a vehicle steering gear comprises a double-acting pistoncylinder 35, 34 actuated by fluid from a pump 15 in accordance with the flow through an adjustable orifice 12 supplied from a control pump 11. The direction of movement of the piston is controlled by a valve 25 in accordance with direction of delivery of the pump 11. Assuming that the pump 11 is driven to draw liquid from conduit 27 and delivers to conduit 26, the pressure difference created between these two conduits acts in cylinders 41, 42 to move the valve 25 to the right thus connecting the pairs of conduits 32, 26, 33, 27, 30, 28 and 31, 29. The delivery of the control pump 11 thus flows through conduits 32, 38 and acts on a spring-loaded piston-cylinder 20 to open adjustable orifices 12, 16. The inlet 27 of pump 11 is thus connected to the outlet of pump 15 through conduit 30, orifice 16, and conduit 33. The piston-cylinder 20 is also connected to the downstream side of orifice 12 through conduit 39 and the two orifices 12, 16 are continuously adjusted in accordance with the pressure drop across the orifice 12. The opening of the orifice 16 also allows the delivery of the pump 15 to flow to the piston-cylinder 34, 35 and the delivery of the control pump 11 is also connected into the conduit 30. The delivery pressure of pumps 11 and 15 which act in cylinders 61, 60 to control a valve 54 which determines the pressures in the cylinders 52, 53 actuating the valve 51. If the pump 15 fails the piston-cylinder 35, 34 may be actuated directly by the pump 11 which will draw fluid past a non-return valve 66 and deliver to the piston-cylinder 35, 34 as above through conduit 37. When the pump 11 acts in the opposite direction, the valve 25 is moved to the left and the piston-cylinder 35, 34 is then moved to the left. The pump 11 may be a gear pump actuated by the vehicle steering wheel. The pump 15 may be a variable displacement pump especially when this pump is used to supply other circuits as well or alternatively the pump displacement may be varied instead of providing the valve 51. The orifices 12, 16 and cylinder 20 may be arranged as a unit. (See Division F2.)
Patent GB-1529425-A (GB)
Title: Production of pitch coke
IPC: C10B57/04
Filed: 1977-04-04
Abstract: 1529425 Pitch coke BERGWERKSVERBAND GmbH 4 April 1977 [3 April 1976] 14062/77 Heading C5E A circular pitch coke is produced by coking a mix of at least two coal pitches, the mix having a viscosity of 50-200 cP at 250-260‹ C. and the pitches having been filtered above 100‹ C. and having differing K-S fusion points.
Patent GB-956075-A (GB)
Title: Improvements in or relating to the production of alkali metal fluoborates
IPC: C01B35/06
Filed: 1962-04-11
Abstract: Alkali metal fluoborate is produced by heating together an alkali metal fluoride or alkali metal acid fluoride, ammonium fluoride or ammonium acid fluoride and boric acid or boric oxide, until substantially all the ammonia and water formed have evaporated.  The reactants may be brought together as aqueous solutions, or as slurries or may be reacted as solids.  The amounts of the reactants are not critical but preferably should be in stoichiometric proportions. The alkali metal fluoborate obtained in the reaction product may be purified by crystallization from water.
Patent GB-543203-A (GB)
Title: Improvements relating to alternating current power distribution circuits
IPC: G05F3/06
Filed: 1940-09-12
Abstract: 543,203. Electric distribution systems. BRITISH THOMSON-HOUSTON CO., Ltd. Sept. 12, 1940, No. 14124. Convention date, Sept. 12, 1939. Drawings to Specification. [Class 38 (iv)]  Relates to distribution networks in which for power-factor improvement series capacitators are connected in the line through step-up transformers which become saturated only on overload In order to avoid the phenomenon of ferro-resonance in the transformer-capacity circuit resulting from heavy overload, which causes this circuit to act like an inductance instead of a capacitance and persists even when the shortcircuit or overload has gone and the line current has assumed a very low value, a resistance element of negative resistance-voltage characteristic is connected in the transformer-capacity circuit. The preferred resistance material is the graphite-silicon material described in Specification 292,110, [Class 38 (iv)], and known under the Registered Trade Mark " Thyrite ". It is so chosen that its resistance at the relatively high voltage across the transformer at resonance produces a current through it, when referred to the primary side of the transformer in excess of the full load rating of the transformer. The resistance may be connected (1) in parallel or in series with the condenser across the secondary of the transformer or (2) across the primary of the transformer.