baber/WOPTO huggingface dataset:
Patent GB-499135-A (GB)
Title: Improvements in and relating to telephone installations
IPC: H04Q3/00
Filed: 1937-05-18
Abstract: 499,135. Automatic exchange systems. LEHNER, C., GADESMANN, M., LEICHTHAMMER, K., and LEICHTHAMMER, H., (trading as TELEFONBAU UND NORMALZEIT LEHNER & CO.). May 18, 1937, No. 13844. Convention date, May 18, 1936. [Class 40 (iv)] In a network including satellites and sub-satellites in which outgoing calls are set up by dialling the letter K followed by digits denoting the exchange and the subscriber required, local calls are set up by dialling the last digit of the exchange designation followed by the subscriber's number. A main exchange denoted by the digit 9 serves an area including satellites such as 92 and sub-satellites such as 924, and the dialling of K at a satellite or sub-satellite routes the call at once to the main exchange. The satellites and sub-satellites are provided with auxiliary switches GW, preferably single-motion, which give access alter natively to local selectors LW anc outgoing lines. As shown, the switch GW has two sets of wipers, loca trunks being wired to one banl beyond position 4 in the case of the sub-satellite 924 and outgoing trunks being wired to the other bank beyond position 10. Wiper-switching relay U operates over a shaft contact wk10 on the relapse of dialling relay V when the letter K, corresponding to the digit 0, is dialled. The local selectors LW are accessible from the incoming trunks over hunting switches VW.
Patent GB-732940-A (GB)
Title: Improvements in or relating to tone-control circuits for use in low-frequency amplifiers
IPC: H03G5/08
Filed: 1953-05-18
Abstract: 732,940. Valve amplifying circuits. PHILIPS ELECTRICAL INDUSTRIES, Ltd. May 18, 1953 [May 21, 1952], No. 13884/53. Class 40 (6). In a tone-control circuit a pair of cascadeconnected valves are provided with undecoupled cathode resistors 5, 6 respectively, interconnected by a resistor 7 giving positive feedback. A low-frequency boost is produced by means of a condenser 9 which causes a reduction in the positive feedback at higher frequencies. The boost may be removed by closing contacts a of switch 10, when negative feedback is applied to the grid of valve 1 via condenser 9 and resistor 11. The influence of the input circuit is reduced by utilizing a series condenser 12 of low value which is shortcircuited when the switch 10 is in the alternative position b. Control of the high-frequency range is obtained by earthing of the centre of the secondary of the output transformer 14, connecting one end of this winding to the lower end of the input volume control 4, and the slider of a shunt potentiometer 13, to the cathode of the valve 1.
Patent GB-180997-A (GB)
Title: Electric switch
IPC: H01H19/32
Filed: 1922-05-17
Abstract: 180,997. Persson, M. A. June 2, 1921, [Convention date]. Switches, q u i c k - break in which an insulating support 2 has the usual peripheral shoulders 5 and fixed contacts 6, have movable contacts 7 carried by a ring 4 driven in one direction only by the rotation of an outer ring 8. As shown, the driving-connection consists of a spring 10 and notches 11, and the lessened resistance which the rubbing contacts 7 experience as they pass off the contacts 6, due to the convex shape of the latter, allows the spring 10 to expand and effect a quick break. The invention can also be applied to a single or multiple pole switch or to a plug switch. Figs. 9 and 10 show a plug switch. The prongs of the plug are inserted into a contact bushing 17 in holes 18, 19 in the support 2.
Patent GB-647368-A (GB)
Title: Means for centering and clamping a flask in position in centrifugal casting machine
IPC: B22D13/10
Filed: 1948-05-24
Abstract: 647,368. Centrifugal casting machines ;  chucks. A.R.D. CORPORATION. May 24, 1948, No. 13957. Convention date, May 24, 1947. [Classes 83 (i) and 83 (iii)]  In a centrifugal casting machine, the mould is centred and held on a rotatable table by a number of simultaneously actuated radially movable jaws. The driven spindle 16 carries a turn-table 10 to which is rigidly secured by brackets 26 a table 24 having three radial slots in which slide jaw holders 32 to which are bolted jaws 30 adapted to centre and grip the mould 20 resting on a pad 22. The jaw holders are moved simultaneously by screws 36 driven from a common driving bevel gear 58 which is in turn driven by a shaft 68 rotated through gears 72 and 74 by handles 98. Gear 74 and handles 98 are mounted on a shaft 76 carrying a toothed wheel 80 and a rotatable eccentric weight 82 which may be locked relative to the shaft by a plunger 84 engaging the wheel 80. After the jaws have been moved inwardly, the weight 82 is rotated about the shaft 76 and locked with its axis transverse to the axis of the radial shaft 68 so that on rotation of the table and flank during the casting operation, the centrifugal force acting on the weight tends to turn the shaft 76 in a direction to exert an additional inward clamping pressure on the jaws 30. Specification 646,542 is referred to.
Patent GB-902785-A (GB)
Title: Composition and process for immersion tin plating
Inventor: BALDEN ALVIN RUSSELL
IPC: C23C18/31
Filed: 1960-04-21
Abstract: Aluminium and aluminium alloy parts are coated with tin by immersion in an aqueous solution of alkali metal stannate and alkali metal polyphosphate.  Suitable stannates are sodium and potassium stannate. Specified polyphosphates are sodium and potassium tripolyphosphate, hexametaphosphate and pyrophosphate. Dry stannate/polyphosphate compositions which are suitable for preparing new tinning solutions or for replenishment purposes are disclosed.  In Example 1, a piston made of a cast aluminium-silicon-copper alloy is cleaned, prior to tinning, by immersion in a solution comprising sodium-metasilicate, -tripolyphosphate, -bicarbonate and -lignosulphate, together with a surface-active agent.
Patent GB-940431-A (GB)
Title: Method and device for the repair of rubber or rubberised articles
IPC: B29C35/00
Filed: 1960-04-21
Abstract: 940,431. Repairing rubber articles by cold vulcanization. O. GRUBER, and W. GRUBER, [trading as STAHLGRUBER OTTO GRUBER & CO]. April 21, 1960 [April 24, 1959; April 25, 1959], No. 14075/60. Heading C3E. In repairing rubber articles the damaged area is simultaneously roughened and heated prior to pressing on a patch, which may also be heated beforehand. A suitable device comprises a roughening plate 6 secured to the underside of a flat housing 3 enclosing a heating coil 4 having contacts 5 closed by pressure on a lever 9 in the handle 1. The patch is heated between parallel upright or inclined discs attached to the top of the housing 3, the one disc being hinged to and spring held against the other, if desired. The patch may also be spring-clipped fiat on the housing 3. Lever switch 9 may be dispensed with and the heating element thermostatically controlled, e.g. by a bimetallic strip device.
Patent GB-1123025-A (GB)
Title: Improvements in or relating to door handle assemblies
Inventor: LEGGE DAVID BRIAN
IPC: E05B3/06
Filed: 1965-04-03
Abstract: 1,123,025. Door handle fittings. J. LEGGE & CO. 23 March, 1966 [3 April, 1965], No. 14219/65. Heading E2A. A door handle assembly comprises a bracket pressed out from sheet metal for fixing to a door a handle rotatably mounted in and supported by the bracket, a spring interposed between the handle and bracket to urge the handle to a neutral position, and a rectangular cover plate which is pressed out from sheet metal and is fixed in position over the bracket when the latter is fixed to the door. The bracket 10 is secured to the door by screws passing through holes provided in end flanges 25, 28. The handle 14 passes through a hole in the bracket and has a square end supporting a washer 16 with three lugs 17, 18, 19. One of the lugs 18, 19 abuts a lug 33 projecting from the bracket and limits the turning movement of the handle. A spring 21 secured to an extension 20 on the washer 16 and an anchorage point 22 at one end of the bracket restores the handle to its original position. An anchorage point is provided on the other side of the bracket to mount the spring for a handle which turns in the opposite direction. A cover plate 34 removably fits over the bracket and is retained by a screw passing through holes 36. 32 in the cover and bracket. The screw may extend into the door.
Patent GB-641602-A (GB)
Title: A high-temperature electric resistance oven
IPC: H05B3/64
Filed: 1947-05-29
Abstract: 641,602. Electric furnaces. COMPTOIR DES CENDRES ET METAUX PRECIEUX, and KLEIN, S. May 29, 1947, Nos. 14258, 14259 and 14260. Convention dates, June 7, 1946, July 20, 1946, and March 14, 1947. [Class 39(iii)] A high temperature resistance for an oven or crucible comprises a tube 2 of vitreous quartz filled with a metal of high boiling point and low melting point e.g. tin, which when molten and after evacuation of air completely fills the tube 2 to a level near its vertical open ends, where current supply electrodes 6 dip into the metal. The helical tube 2 is embedded in refractory material 4, 5 e.g. powered silica or alumina. High frequency currents may be passed through the molten metal to obtain supplementary heating by induction of a graphite crucible or material placed within the coil. In order to prevent deformation by unequal expansion on starting from cold, the oven is first heated by an external resistance 7 until the tin is melted. The tube 2 is evacuated prior to introduction of the metal. A flow of molten metal may be set up through the tube 2 to move bubbles of gas to the open end of the tube. Thus cupules 24 are attached by quartz ducts 23 to the tube, and another cupule 27 may communicate through a duct 26 with the middle part of the tube 2, and molten metal may be forced e.g. by pneumatic means 28 from the central cupule 28 to replace metal in the tube. The tubes 23, 26 are inclined and the cupules are above the tube to create a hydrostatic pressure on the molten metal therein.
Patent GB-688142-A (GB)
Title: Improvements relating to electrical wave filters
Inventor: GRAHAM REGINALD
IPC: H03H11/12
Filed: 1950-06-08
Abstract: 688,142. Electric filters. ELECTRIC & MUSICAL INDUSTRIES, Ltd. June 6, 1951 [June 8, 1950], No. 14262/50. Class 40 (viii). An electric filter for separating signals of one frequency from those of another comprises a bridged T network which transmits the first frequency and whose series arms 6, 7, and 8 are tuned to reject the second frequency, the rejected signal being picked off by a coil 13 coupled to the inductance 6, and the damping introduced by this coupling is compensated by adjustment of the shunt arm resistance 9 of the T network. The arrangement as shown is utilized for separating the sound and vision signals in a television receiver.
Patent GB-1127279-A (GB)
Title: Explosive booster assembly
IPC: F42C19/08
Filed: 1967-03-29
Abstract: 1,127,279. Boosters. CANADIAN INDUSTRIES Ltd. 29 March, 1967 [2 May, 1966], No. 14309/67. Heading F3A. An explosive booster assembly particularly for use with blasting agents of low sensitivity comprises a resilient thermoplastic cylindrical body 21 terminating at one end in a section 23 of smaller internal diameter adapted to receive in slidable yet gripping relationship an initiator 26 of tubular shape e g. an electric blasting cap, and a cast explosive composition 25 contained within the section of the body having a larger internal diameter. A cavity 28, to receive a blasting cap, may be provided in the cast explosive. Fins 24 to ensure a snug fit in, for example, the booster well of a blasting agent container may extend outward from the section 23. A protective cap 27 anchored in the cast explosive may be provided at one end of the body 21. The body is made from polyethylene or rubber. The cast explosive composition comprises pentolite, composition B, cyclonite, PETN or TNT. In the manufacture of the booster the body 21 is filled with molten explosive and the narrow section 23 is kept free of explosive by a tight-fitting metal pin. The cap 27 is inserted before the explosive sets. The booster is used particularly in seismec marine operations to detonate a charge of nitrocarbonitrate contained in a metal can, the booster being inserted in a well provided at one end of the can.
Patent GB-364991-A (GB)
Title: A combined portable table and seats
IPC: A47B3/14
Filed: 1931-05-14
Abstract: 364,991. Folding tables and seats. SMITH, L., Belgrano, Burton Joyce, Nottingham, and DAVIES, D. T., 14, Strathray Gardens, Hampstead, London.- (Handy Table Set Co. ; Milwaukee, Wisconsin, U.S.A.) May 14, 1931, No. 14344. [Classes 52 (ii) and 52 (iii).] A combination portable table and seats comprises two sections, forming the table top, hinged together and supported upon folding seats, which may be packed inside the two sections. As shown in the Figure, two traylike receptacles 10, 11 are connected by hinges 12, and are supported by links 21, 24 upon two pa:irs of seats 13. Each pair of seats comprises parallel side frame bars 14 and end bars 15 ; legs 16 are hinged to the undersides of the tops 13 and extended by stays 18 which are pivoted to the legs and engage with catches 20. The links 24 have rule joints 25.
Patent GB-266581-A (GB)
Title: Improvements in jacks
IPC: B25B27/02
Filed: 1926-06-07
Abstract: 266,581. Smith, H. J., and Clark Manufacturing Co. June 7, 1926. Crossheads. - A jack applicable for removing a pistonrod C from its crosshead a is secured to the crosshead by wedges B. The jack is of the screw-actuated wedge type having the wedge provided with anti-friction means such as cage-mounted rollers. A leverbar operated screw 2 is eccentrically mounted in a frame 1 so that the thrust of the wedge is taken by the thickest part of the frame, the wedge 10 having a swivelling connection 8 to the screw. The wedge slides in a correspondingly shaped recess in the frame and is fitted with cage-mounted rollers 14 on both sides, the ram 19 engaging the part C by means of spacing members 20. The lower set of rollers may be replaced by rollers mounted in recesses in the ram.
Patent GB-805027-A (GB)
Title: An improved leather article
IPC: C14C11/00
Filed: 1957-05-06
Abstract: A leather article suitable for use as a semi-permeable oil seal comprises leather having a surface coating of a cured siloxane consisting of from 5 to 20 per cent by weight of a methylhydrogenpolysiloxane and from 80 to 95 per cent by weight of a polysiloxane gum containing aliphatic organic radicals of less than four carbon atoms or phenyl radicals, said gum having a viscosity of at least 1,000,000 cs. at 25 DEG  C.  The coating may also impregnate the leather and two such coatings may be applied and cured individually.  The coating may be applied by spraying, dipping or brushing and may be in solution in xylene, toluene or petroleum ether.  As curing catalysts may be lead lead octoate, tin octoate, dibutyltindioctoate, dibutyltindiacetate, dibutyltindilaurate, cobalt naphthenate, zinc naphthenate or iron 2-ethyl-hexoate.  The methyl hydrogensiloxane used may be the homopolymer or a copolymer with trimethylsiloxane or dimethylhydrogensiloxane.  Dimethyl-, phenylmethyl-, vinylmethyl-, diethyl-or ethylmethyl-polysiloxane or a copolymer of dimethylsiloxane with diphenylsiloxane, with phenylmethylsiloxane and vinyl methylsiloxane, or with monomethylsiloxane may be used as the gum.ALSO:A polysiloxane composition for coating leather comprises 5 to 20 per cent by weight of a methylhydrogenpolysiloxane and from 80 to 95 per cent by weight of a polysiloxane gum in which the organic radicals are lower aliphatic hydrocarbon radicals having less than four carbon atoms or phenyl radicals, said gum having a viscosity of at least 1,000,000 c.s. at 25 DEG  C.  Curing catalysts such as lead octoate, tin octoate, dibutyltindioctoate, dibutyltindiacetate, dibutyltindilaurate, cobalt naphthenate, zinc naphthenate and iron 2-ethylhexoate may be added and solutions of the above in, for example, xylene, toluene or petroleum ether may be used.  The methylhydrogensiloxane may be a homopolymer or a copolymer with trimethylsiloxane or dimethylhydrogensiloxane.  Dimethyl-, phenylmethyl-, vinylmethyl-, diethyl- or ethylmethyl-polysiloxane or a copolymer of dimethylsiloxane with diphenyl siloxane, with phenylmethylsiloxane and vinylmethylsiloxane, or with monomethyl siloxane may be used as the gum.
Patent GB-883681-A (GB)
Title: Improvements in and relating to apparatus for the multiplication of electrical signals
Inventor: GOMPERTS ROBERT JAMES
IPC: G06G7/164
Filed: 1957-05-06
Abstract: 883,681. Electric analogue computing systems. ENGLISH ELECTRIC CO. Ltd. May 1, 1958 [May 6, 1957], No. 14392/57. Class 37. In an arrangement wherein the peaks of a saw-tooth or triangular waveform are clipped above a level controlled by an input signal to provide a signal which is a measure of the square of said input signal, means for clipping the peaks comprises at least two cascade stages, each including a unidirectional conducting device. In an arrangement, Fig. 3, for multiplying values X and Y, saw-tooth waveform #(t) from a generator 11 is applied with appropriate biasing #B from a source 12 to four clipping stages D-G together with plus and minus input values of X and Y as shown, to produce two signals-(X+Y)<SP>2</SP> and +(X - Y)<SP>2</SP>. The clipping stage may comprise two or more parallel diodes, and the output, when added through resistors 17, produce a signal proportional to the product XY, which is then amplified in a unit 19 and filtered in unit 20 to obtain a mean value. All or part of the waveform is clipped in. dependence on the relative polarities of the bias and the applied signals and the signal strengths. It is demonstrated mathematically that the mean value of a clipped signal is proportional to the square of the clipping value (X+Y) or (X - Y). In a computer, the output of a function or scanning generator may provide the requisite triangular waveform.
Patent GB-1175167-A (GB)
Title: Crimping Tool.
Inventor: HUNTER TRAVIS LOWELL
IPC: B21D39/02
Filed: 1968-03-26
Abstract: 1,175,167. Bending; seaming. T. L. HUNTER. 26 March, 1968 [28 March, 1967], No. 14467/68. Headings B3E and B3J. A portable tool for crimping sheet metal edges comprises a hand held holder, a hammer pivotally mounted on the holder, support means on the holder for supporting a part between the hammer and the support while the part is being crimped, the support means having a surface contoured to correspond with the part to be crimped, the hammer when pivoted coacting with the support to crimp the part, and guide means for contacting the edge of the part to be crimped being located on the holder between the hammer and the support means. The tool comprises a handle 16 which has secured to it a platform 20, from which project two spaced lugs 34. A pin 36 is locked in bores in the lugs by screws 40 and pivotally supports a lever 14. One end 42 of the lever is the work engaging portion and the other end has a shallow groove 51 which receives the end of a push-rod 28 which passes through the handle, and has an enlarged end 30 by which it is connected to an air-operated hammer. The lever is biased to the position shown in Fig. 1, by a torsion spring 50. An anvil 58 which may be flat, or curved to suit the work, has a spigot 60 which is received in a bore 61 in the platform and held by a spring-loaded ball 62. The workpiece is the outer panel of a car door, which is to be turned over the edge of the inner panel. The end 41e of the workpiece is bent over by movement of the lever 14 to the dotted line position shown in Fig. 1 and the tool moved along the edge of the panel to bend successive portions of the seam. The edge of the panel abuts the vertical surfaces of the lugs 34 to guide the tool. The anvil 58 may be metal or a high impact plastics, e.g. polyurethane rubber.
Patent GB-168380-A (GB)
Title: Improvements in and relating to valve gear for mixed pressure turbines
IPC: F01D17/14
Filed: 1920-05-27
Abstract: 168,380. British Thomson - - Houston Co., Ltd., and Halliwell, R. F. May 27, 1920. Addition to 147,975. Regulating.-Relates to governing and valve mechanism for mixed-pressure turbines as claimed in the parent Specification, and consists in the provision of means for enabling the low-pressure valve to be re-opened automatically more quickly upon the restoration of the pressure of the lowpressure supply. To this end, the valve 26, which controls the supply of motive fluid to the lowpressure servo-motor by way of the pipe 27, opens an additional port 40 as it moves to effect the opening of the low-pressure valve. By means of a pipe 39 leading to the valve 36, described in the parent Specification, this port 40 establishes communication between the high-pressure servomotor and a passage 41 leading to the oil-escape pipe 28, thus facilitating the quick operation of the high-pressure servo-motor for closing the highpressure valve, the low-pressure valve being opened at the same time.
Patent GB-170618-A (GB)
Title: Improvements in electric accumulators
IPC: H01M10/22
Filed: 1920-05-27
Abstract: 170,618. Pouchain, A. May 27, 1920. Electrolytes; electrodes.-The electrolyte in an accumulator having a zinc negative electrode consists of a solution in sulphuric acid of the sulphates of zinc, aluminium, potassium and mercury together with small quantity, not exceeding 4 per cent, of glycerine or other polyvalent alcohol of the fatty series. Other sulphates such as sodium or magnesium sulphate may be added. The sulphates of zinc, aluminium and potassium may be dissolved nearly to saturation in the acid, only a small quantity of mercury sulphate being added.
Patent GB-960906-A (GB)
Title: Improvements in or relating to television and other cameras
IPC: G03B19/18
Filed: 1961-04-21
Abstract: 960, 906. Camera diaphragm adjustments. TELEFUNKEN PATENTVERWERTUNGS G.m.b.H. April 21, 1961 [April 23, 1960], No. 14506/61. Headings G2A and G2J. In a camera having interchangeable lenses with motor adjustable diaphragm apertures, the drive from the motor includes a member which is normally spring held in a central position and is so mounted as to be moved from this central position when the load reaction exceeds a normal load reaction and corresponds to that which occurs when a diaphragm stop is reached, the member being arranged in moving under the excess load reaction to switch off the motor drive. As shown in Fig. 2, a television camera has an interchangeable objective 1, the diaphragm adjustment ring 1a of which engages a toothed wheel 3 connected by a slipping clutch to a shaft 4 driven by gearing 5, 6, 7 operated by a motor 8. The intermediate gear 6 is mounted on a pivoted lever 9 which is normally kept in a central position by spring plungers and which has a flange at one end for operating spring contacts in the motor circuit. On closure of the motor circuit the gearing drives the diaphragm adjusting ring 1a but when this ring reaches a diaphragm end stop the load reaction is such as to displace lever 9 in one direction or the other so as to open one of the spring contacts and so stop the motor. Another form is shown in Fig. 3 in which the intermediate gear 15 is used to operate the spring contacts 12 or 13 by moving in one direction or the other along its shaft 14 when the load reaction exceeds normal. The gear 15 is normally held by a spring 17 in a central position with the contacts 12 and 13 closed. Fig. 5 shows a further form in which the contacts 12, 13 are actuated by a load-dependent axial movement of the shaft of a worm 22 which engages in it a worm wheel 23 included in the drive from the motor 8 to the diaphragm adjusting ring. The interchangeable objectives may be mounted on a turret.