baber/WOPTO huggingface dataset:
Patent GB-583417-A (GB)
Title: An improvement in or relating to storage or filing cabinets
IPC: A47B51/00
Filed: 1944-10-25
Abstract: 583,417. Cabinets. BARRON, C. A., and BARRON, H. D: Oct. 25, 1944, No. 20694: [Class 52 (i)] A storage or filing cabinet has every container divided into two halves; each set of halves being connected to ah endless chain for simultaneous movement in opposite directions. One chain passes round sprockets carried on shafts d, d', the other round sprockets on shafts c, c<1>, c being 'connected to a bevel gear e, and d passing through c and terminating in a bevel gear f. A shaft h rotatable by a motor i or by hand, has a bevel pinion g which meshes with e and f, so raising one set of half containers while lowering the other. The two halves of each container come together at an opening b in the front casing a of the cabinet.
Patent GB-886882-A (GB)
Title: Improvements in the production of photographic silver halide emulsions
IPC: C08F118/08
Filed: 1960-06-13
Abstract: 886,882. Photographic emulsions. DU PONT DE NEMOURS & CO., E. 1. June 13, 1960 [July 7, 1959], No. 20698/60. Class 98(2). A photographic emulsion is prepared by the steps of (a) redispersing a washed gelatinosilver halide coagulum in an aqueous solution to give a redispersion containing not more than 25% gelatine, based on the weight of silver halide, (b) adding a chemical sensitizer and digesting at a temperature of at least 90‹F., (c) re-coagulating, (d) removing the supernatant liquid and (e) redispersing in an aqueous water-permeable colloid. The initial coagulum may be prepared by mixing the gelatine emulsion with acetone, dimethyl sulphate, an anion soap, a water-soluble polymer containing acid groups or salts thereof such as an acetal of polyvinyl alcohol and sodium o-sulphobenzaldehyde or a methylvinyl ether / maleic anhydride copolymer, carrageenin, sulphated alcohols such as sodium dodecyl sulphate, or salts such as sodium sulphate and ammonium nitrate. The re-coagulation in step (c) may be effected in a similar manner to the initial coagulation, or in many cases simply by adjusting the pH of the dispersion by adding an acid. The coagulum may be washed between steps (d) and (e). For the final dispersion, the colloid may be gelatine, polyvinyl alcohol, polyvinyl acetals, carboxylated polyvinyl acetals or polyvinyl pyrrolidone. Specifications 580,504, 718,422, 762,019, 786,176, 855,216, 867,138 and 872,033 are referred to.
Patent GB-460096-A (GB)
Title: Improvements in frequency changers
IPC: H03B21/02
Filed: 1935-07-20
Abstract: 460,096. Generating oscillations. SIEMENS & HALSKE AKT.-GES. July 20, 1935, No. 20705. Convention date, July 20, 1934. [Class 40 (v)] Relates to frequency multipliers or dividers of the kind in which an original frequency is changed by a process of multiple reactive modulation. Specifications 216,132, [Class 40 (v)], and 421,129 are referred to. According to the invention, passive modulators such as the bridge of copper-oxide rectifiers 25, 26, 27, 28 shown in Fig. 3 are used instead of valves, and are separated from their associated amplifiers. In the arrangement of Fig. 1, an original frequency f1 is applied to the terminal 7 of the modulator M1 and also to the terminal 8 of modulator M2. Another frequency f2, which may or may not be an harmonic, is produced as the result of some initial instability at the terminal 9. The resulting sum or difference frequency f3 passes from the terminal 11 through an amplifier 5 and filter 3 tuned to it, and through the second modulator M2, where it combines with the original frequency f1. The resulting frequency f2 passes through a tuned amplifier 6 and filter 4 back to the modulator M1. Or it can be drawn off at 14. Similarly the frequency f3 can be drawn off at 13. In Fig. 2 only one modulator M is used, and the currents pass through it twice, the filters 3, 4 accepting the sum and difference frequencies respectively.
Patent GB-653476-A (GB)
Title: Process for the preparation of a new derivative of aneurin
Filed: 1948-08-05
Abstract: The triphosphoric ester of aneurin is obtained from the crude product of phosphorylated aneurin by selective precipitation with 2 : 4 : 6-trinitro-resorcinol by means of which the pure product separates out, whereas the impurities remain in solution.  A detailed example is given.
Patent GB-872004-A (GB)
Title: Improvements relating to heating devices in drying apparatus
IPC: B41F23/04
Filed: 1958-06-30
Abstract: 872,004. Drying fabric or like webs. TIMSON, E. A. June 25, 1959 [June 30, 1958], No. 20881/58. Drawings to Specification. Class 34(1) The Specification is substantially similar to Specification 872,003 though with differing claims directed towards the heating devices.
Patent GB-1194673-A (GB)
Title: Improvements in or relating to Fluid Pressure Operated Braking apparatus for Motor Vehicles
Inventor: FARMERY GEORGE KENNETH
IPC: B60T13/58
Filed: 1966-05-11
Abstract: 1,194,673. Air assisted hydraulically operated braking system. CLAYTON DEWANDRE CO. Ltd. 1 Aug., 1967 [11 May, 1966], No. 20900/66. Heading F2F. In a fluid pressure operated braking system for road vehicles, having a dual brake valve 5 (e.g. as described in Specification 1,010,942) for controlling the admission of pressurized air, from a dual reservoir 3 supplied by a compressor 1 via a governor valve 2, to a dual piston actuator 6 coupled hydraulically preferably through a tandem master cylinder 7 to the vehicle brakes 8, 9 respectively, there is provided a-heavier rating spring bias means on one section of the brake valve 5 than on the other valve section. Thereby one valve section is prevented from opening until a predetermined force acts on the other. Thus with a biasing difference of say 25 p.s.i. one actuator 6 section will be rendered inoperative at a pedal effort of less than 25 Ib/sq. inch at the valve, and for a given pedal effort there will be a corresponding reduction in the force applying the brakes. The dual piston actuator 6 may be as described in Specification 993,333 wherein pistons and cylinders are arranged coaxially end to end to produce an additive thrust.
Patent GB-746285-A (GB)
Title: Improvements relating to self-priming centrifugal pumps
IPC: F04D9/04
Filed: 1953-07-28
Abstract: 746,285. Friction clutches; friction gearing. SIGMUND PUMPS, Ltd., and SIGMUND, M. July 21, 1954 [July 28, 1953]. No. 20925/53. Classes 80(1) and 80(2). [Also in Group XXVI] A priming pump shaft 12, Fig. 1, is driven from the shaft 5 of a main pump through friction gear wheels 7, 13 and a centrifugal clutch 14. The priming pump casing 9 is mounted on a pair of parallel guide rods 10 (one only shown) for movement relative to a main structure 1. The guide rods 10 are connected by a bridge piece 19, to which are pivoted two .levers 20 having registering recesses which receive a ball 21. Longitudinal movement of . a hand-operated rod 22 causes relative pivotal movement of the two levers 20, whereby the ball 21 emerges from the recesses and causes downward movement of the lower lever 20. This movement is imparted to the casing 9 against the action of springs 18, bringing wheel 13 into frictional engagement with wheel 7. The centrifugal clutch 14 comprises a pair of friction shoes 27, Figs. 2 and 3, each pivotally connected by a bonded rubber bush 29 to a pair of parallel bars 28, which in turn are pivotally connected by a bonded rubber bush 31 to a plate 34 which is bolted to the wheel 13 through spacing posts 35. The bushes 29, 31 are stressed to press the shoes 27 against a drum 26, whereby the drive is transmitted from the wheel 13 to the shaft 12. If the wheels 7, 13 are left in engagement after the shaft has run up to high speed, the action of centrifugal force on weights 30 carried by the bars 28 will pivot the shoes 27 away from the drum 26 to interrupt the drive, thereby preventing overspeeding of the primary pump 8. The Provisional Specification refers to the friction wheels being engaged by an angular movement of the priming pump.
Patent GB-308938-A (GB)
Title: Improvements in or relating to gear grinding or milling machines
IPC: B23F23/12
Filed: 1928-07-19
Abstract: 308,938. Moss Gear Co., Ltd., and Gregory, E. July 19, 1928. Milling.-The grinding-wheel or milling-cutter of a gear grinding or milling machine is mounted on a spindle 3 having oppositely tapering sections 3<a>, 3b, of different conicities, these sections coacting with bearing surfaces provided in separately-adjustable members 6, 9 respectively. The member 9 is of sleeve form and its upper end is screwed to receive an adjusting nut 10 bearing on the framing 8. The lower end of the member 9 is internally threaded to receive a block 7 screwing over the adjusting-member 6 and bearing against the framing 8. The spindle is carried at its upper end in a ball bearing 11 and is driven through spur gearing 21 and bevel gearing 13.
Patent GB-238386-A (GB)
Title: Improvements in or relating to fastening devices for use with doors and the like
IPC: E05B65/14
Filed: 1924-09-05
Abstract: 238,386. Blake, H. J., and Salt, F. E., (Representatives of Blake, J.). Sept. 5, 1924. Pivoted-bar fastenings particularly for hinged sides and doors of railway &c. wagons, such as are described in Specification 2436/14, are provided with means to prevent the slotted end of the bolt A from jamming between the pin B, on which the bolt can slide and pivot, and the back plate D. Fig. 1 shows the bolt in fastened position with an enlargement a<1> thereon engaged in a socket E. To release, bolt A is raised vertically to the extent allowed by the slot a to disengage enlargement a<1> from the socket, and can then be swung outwardly on the pivot pin B to the hanging position, Fig. 3. The slotted end of the bolt and the co-operating parts are so shaped that the bolt can receive longitudinal movement on pin B only when in the vertical position shown in Fig. 1, the bolt in other positions being restricted to pivoted movement on the pin which is retained at the outer end of slot a. A projection G engaging the supporting lugs C' prevents endlong movement of the bar in the position shown in Fig. 3, and as the bar is swung upwards, disengaging projection G from the lugs, the end of the bar engages a curved recess F between the lugs to maintain restriction to a pivotal movement. In a modification, Fig. 8, two projections G<1> are provided on opposite sides of bolt A. The projections may reach to the edge of the slot a as shown, or be narrower, and the recess between the lugs is accordingly flat as in Fig. 8, or curved. In another form the projections are disposed on the other side of the slot, and the lugs C' have recesses to receive them when the bolt is in the fastened position. In a further form. Fig. 15, a single projection G co-operates with the curved recess F.
Patent GB-791491-A (GB)
Title: Improvements relating to semi-conductor rectifiers
IPC: H01L23/427
Filed: 1956-07-06
Abstract: 791,491. Cooling devices for semi-conductor rectifiers. COMPAGNIE FRANCAISE THOMSON-HOUSTON. July 6, 1956 [July 6, 1955], No. 21049/56. Class 37. Electrodes of semi conductor rectifiers comprise heat - conducting masses 5 in contact with a vaporizable liquid in chambers 6 open to the interior of hollow cooling fins 8. The heating of the rectifier boils the liquid which then condenses in the upper part of the fin. The surface area of contact of the masses 5 may be increased by milling the edge or by cutting or drilling holes, grooves or slots or in any other wellknown manner. Terminal tags 9 may be attached to the fins.
Patent GB-1002086-A (GB)
Title: Process for preparing methylhexa-2,5-dienoate
IPC: C07C69/52
Filed: 1962-06-01
Abstract: Methyl hexa-2,5-dienoate is made by reacting methyl allyl ether, acetylene and carbon monoxide in the presence of nickel carbonyl, methanol and hydrochloric acid or allyl chloride at 20 DEG  to 60 DEG C., in the following molar ratio ranges:-methyl allyl ether: hydrochloric acid from 1 to 10; carbon monoxide:acetylene from 0.5 to 1;nickel carbonyl to hydrochloric acid from 0.5 to 1.5.  The product obtained is mainly the cis form and is accompanied by the 3,5-and 2,4- isomers and methacrylate in small amounts.  The free acid can be obtained by hydrolysis.
Patent GB-1061076-A (GB)
Title: Fastener for fastening engagement with a fabric
IPC: A41F1/00
Filed: 1964-05-22
Abstract: 1,061,076. Strip fastenings. R. V. MATHISON. May 22. 1964 [June 4, 1963], No. 21265/ 64. Heading E2S.  A fastener for fastening engagement with a fabric comprises a base formed of a synthetic polymer which has a plurality of integral, closely spaced smooth sided projections, each tapering from the base to a relatively sharp tip for engaging in loops or interstices of said fabric the projections being so arranged that when engaged in said loops or interstices they are disposed at an acute angle to the base, some of them extending in a different direction to others. In the embodiments shown the supporting structure is a strip along which the projections, which are straight-sided, are arranged in longitudinal rows. In one embodiment, Fig. IA, the projections 7, 8 slope in alternate directions to engage in loops in a fabric 1 and resist pulls in the directions of the arrows 10, 9 respectively. In a second embodiment two rows of projections on each side of the longitudinal centre portion of the strip slope outwardly from the centre portion, and in a third embodiment Fig. 4 each of two rows of projections 31, 32 slope inwardly towards the centre portion and engage in loops 3 in a loop of loop pile fabric 1. The centre portion between the rows of projections may be elastic. In a further embodiment Fig. 5, four rows of projections 44 on the convex face of an arched strip 42 extend with their centre lines parallel. To engage the projections in loops in the fabric the strip is snapped to a position in which the convex face becomes concave so that the projections 44 then slope in towards the longitudinal centre portion of the strip. The projections nearer the centre portion are made longer so that when the fastener is engaged with the strips the tips of all the projections are co-planar. In a further embodiment parallel projections are provided on the concave face of an arched strip which is then snapped so that the concave face becomes convex. In this case the projections farther from the centre portion of the strip are made longer. In Fig. 7 rows of outwardly directed projections 69, 70 on strips 66, 67 are engaged with loops 3 in the fabric by compressing a U-shaped springy portion 65 connecting the strips and then allowing it to spring open in the direction of the arrows 73, 74. In all embodiments the projections are preferably conical or pyramidal and preferably the tip of one projection overlies the base of the adjacent projection. Suitable polymers from which the fastener may be  made, and convenient dimensions and angles of slope for the projections are given in the Specification. All the fasteners are formed by injection or compression moulding with the projections arranged in parallel, and then heating the moulded product and bending the base thereof to the shape required.
Patent GB-704909-A (GB)
Title: Improvements relating to metal tins or containers
IPC: B65D51/20
Filed: 1951-09-10
Abstract: 704,909. Making hollow-ware. UNIVERSAL METAL PRODUCTS, Ltd., and BIDDULPH, M. Aug. 22, 1952 [Sept. 10, 1951], No. 21272/51. Class 83 (2). [Also in Group XVII]  A metal container body a is produced by impact extrusion with a narrow throat d forming the top which may be screw threaded for a cap and have an integral diaphragm e which is pierced for use. The base of the container is closed by a disc c shaped to fit within the body, a flange being beaded at g to clamp the outside of the wall.
Patent GB-1099214-A (GB)
Title: Time delay computer element
IPC: H03K17/72
Filed: 1966-05-13
Abstract: 1,099,214. Transistor delay switching circuits. WESTINGHOUSE ELECTRIC CORPORATION. May 13, 1966 [May 20, 1965], No. 21337/66. Heading H3T. A time delay circuit comprises at least three semi-conductor switching devices S1, S2, S3 a first state of an input signal turning on device S2; means having a time delay initiated by the turning on of S2 to turn on S3 and produces an output signal at terminal 10; means to turn on device S1 when the input signal has a second state; and means C1, C2, C3 for ensuring that only one semi-conductor switching device is turned on at a time. Assume initially that S1 is turned on, then closing switch 14 will produce a pulse in W3 to fire S2 and commutating capacitor C1 will extinguish S1. Capacitor C4 will commence to charge, and after a delay, determined by the setting of R2, diode D will break down to fire S3 and produce an output at 10. Capacitor C2 will extinguish S2. When switch 14 opens, the resulting pulse in winding W2 will refire S1 and C3 will extinguish S3. In a modification, Fig. 2 (not shown) the firing pulse for S1 is provided by making switch 14 a changeover switch which connects a positive supply to winding W1, shorting resistor R 0 .
Patent GB-498152-A (GB)
Title: A process for the separation of nickel salts from solutions containing other heavy metals
IPC: C01G1/06
Filed: 1937-08-03
Abstract: Nickel salts are separated from solutions containing other heavy metals, especially iron and copper, by precipitation as nickel chloride by concentrated hydrochloric acid.  The solutions may be those obtained by the lixiviation of copper-nickel mattes containing iron with acids.  If the solution contains divalent iron, this is preferably first oxidized by passing chlorine into the solution in the presence of calcium carbonate or by bleaching powder.  The solution is saturated by hydrogen chloride gas, which is preferably led rapidly thereinto, whereby the solution is heated and nickel chloride separates in a state poor in water. The precipitation may be completed by cooling, the hydrogen chloride being still led in, but in a weak current.  If the solution contains a large amount of other metals compared with nickel, these should be removed in part prior to the precipitation of the latter.  Thus, ferric hydroxide may be separated by heating the oxidized solution, or hydrated manganese dioxide on the addition of calcium hypochlorite.  The mother liquor obtained on separation of the nickel chloride may be used for lixiviating further initial material.  Examples are given.
Patent GB-446166-A (GB)
Title: Improvements in or relating to variable speed gearing
IPC: F16H39/36
Filed: 1934-07-21
Abstract: 446,166. Variable - speed gearing. SZEKELY, O. E., 818, Church Street, Elmira, New York, U.S.A. July 21, 1934, No. 21427. [Class 80 (ii)] In an infinitely-variable epicyclic change-speed gear, the driving member carries a planet pinion engaging a gear on the driven member and a smaller gear on the reaction member, which is connected back to the driving member by a gear pump, the outlet of which is throttled to produce a drag effect. In the form shown, the casing 25 on the driving shaft 20 is connected to the driven shaft 40, (1) by planet pinions 46 engaging a gear 45 on the driven shaft and a reaction gear 48 connected through a gear pump 49, 60 back to the casing 25 and (2) by gear pump 50, 60, Each of the pumps draws oil from a sump in the main casing and discharges it into a common chamber 110 from which it returns to the sump through a throttle 112. When the throttle is wide open, the shaft 40 and gear 50 are stationary and the gear 48 rotates forwards at rather more than twice the speed of the driving shaft. As the throttle 112 is closed by a control, the gear 48 is retarded by the pump 49, 60, thus producing a forward torque on the driven gear 45, while a further forward torque is applied to the gear 50 by the pump 50, 60 until when the throttle is closed the pumps are locked and direct drive is obtained. Owing to the common discharge chamber 110, the loads on the two pumps are always equal. The spindles 61 of the pinions 60 of the pumps are held in plates 26, 52 integral with the driving casing 25 and carrying blades 26a, 52a which pick up oil from the sump and deliver it to the pumps through openings 67. Since the gear 48 is smaller than the gear 45 a high starting torque is obtained. A freewheel clutch 41 is provided between the driven shaft 40 and the gear 48 to prevent overrunning and allow engine braking. An ordinary reverse drive may be obtained by opening the throttle 112 wide and connecting the driving casing 25 to the driven shaft through gears 82, 89, 89a, a shiftable gear (not shown), and a gear 90.
Patent GB-723886-A (GB)
Title: Improved chuck
IPC: A47K10/14
Filed: 1951-09-13
Abstract: 723,886. Chucks. NATIONAL ACME CO. Sept. 13, 1951 [Oct. 11, 1950], No. 21549/51. Class 83(3). A chuck comprises two cover members 12, 13 constituting a cylindrical body 12, plates 40 attached to radially movable jaws 14, and springs 45 between each plate and the body. The chuck is secured to a spindle 10, which may be as described in Specification 723,885 by an adapter 30. The jaws are moved to grip the work by a bevelled sleeve 15. Buttons 55 engage the adapter 30 to assist in transmitting the driving torque. A sleeve 52 and an extension 53 keep the mechanism clean.
Patent GB-1112086-A (GB)
Title: Moulding apparatus
Inventor: RONNE RONALD MACKENZIE
IPC: B22C23/00
Filed: 1965-05-21
Abstract: 1,112,086. Core-making machines. DEPENDABLE SHELL CORE MACHINES Inc. 21 May, 1965, No. 21557/65. Heading B3F. Devices for moulding articles, i.e. multiple core-boxes 30, 32 for moulding cores, are mounted (in halves 30a-30b, 32a-32b, shown open) on plates 34, 35, 37 movable along rods 22 -24 of a mounting 16 and on another plate 38 non-movable on the rods, so that, when a wheel 100 is turned, an arm 102 is swung and a pivoted link 104 extends to push the movable plates and their core-box halves together and against the end-plate 38, Fig. 3 (not shown), ready to be heated and to receive resin-coated sand; when the wheel 100 is reversed the box halves are separated, to the positions shown, as determined by headed link-rods 128, 132, for the cores to be loosened by vibrators 136, 138. The link-rods are free-running one above the other in holes in an ear 124 on an intermediate assembly (including the plates 35, 37 and corebox halves 30b, 32a in fixed relation) but one end of each is adjustably secured by nuts to an ear 122 or 126 on the plate 34 or 38. When the core-box halves 30a-30b, 32a- 32b are closed together, Fig. 3 (not shown), they are heated by gas burners 92. Then, when a treadle 118 is depressed, a latch 114 is released and the whole mounting 16 is swung upside down by hand about a horizontal axis, on end bearings 12, 14 mounted on pillars 10, Fig. 1 (not shown). A container (106) slung beneath the mounting is thus inverted and discharges (by gravity or air pressure) resin-coated sand, through apertures 112 in a board 110, into the core boxes 30, 32. After a period of time, the mounting 16 is swung upright again and excess sand flows back into the container, the wall thickness of the shell cores remaining having been determined by the time of heating.