baber/WOPTO huggingface dataset:
Patent GB-1342956-A (GB)
Title: Electric valve switching matrices
IPC: H02M1/088
Filed: 1971-04-28
Abstract: 1342956 Converting; parallel operating of thyristors GENERAL ELECTRIC CO 28 April 1971 [28 April 1970] 11834/71 Heading H2F In a matrix comprising at least two parallel paths, each path containing at least one thyristor, selected thyristors are triggered first; an RL circuit (such as R1, T1) being included to maintain the voltage across the remaining thyristors until they are triggered after a predetermined delay. As shown in Fig. 1, thyristors 1A, 2A, 3A and 4A are triggered first giving a path through the simulated valve betweenterminals A, K including RL circuits R1, T1 which maintain the forward voltage across the remaining thyristors. After a delay, e.g. 20 Ás, thyristors 1B, 2B, 3B and 4B are triggered, the current in the two series paths being equalized by L1 and R4. The LR circuits minimize the rate of rise of current while allowing sufficient discharge of stray capacitance to prevent damage to the subsequent thyristors. Inductors T1 may be linear or, as shown, saturable. The cores are reset by triggering the "A" and "B" thyristors first on alternate cycles. In Fig. 2 (not shown) circuits R1, T1 are replaced by saturable inductors connected between thyristors in each series chain, each inductor being bridged by a series chain of two diodes and two resistors, the tapping between the resistors being connected to the junction between two thyristors in the next series chain. Triggering circuits for parallel thyristors.-In Fig. 3, a light pulse generator transmits a light pulse along light guides at the triggering time of each matrix (Fig. 1). Each pulse is received at 103 and converted to an electrical pulse which is fed to a firing circuit 108 for the "A" thyristors from where pulses are distributed via multisecondary transformers 109. The "B" thyristors are similarly triggered after a 20 Ás delay at 110. If the "A" and "B" thyristors are to be triggered first on alternate cycles, a logic circuit 104 is included to inhibit the path for undelayed pulses on alternate cycles. The delayed triggering may - alternately be achieved by a delay circuit fed by signals derived from the current or voltage of the first-triggered thyristors.
Patent GB-764065-A (GB)
Title: Improvements in or relating to filters for optical use
Inventor: ROTHSCHILD SIEGFRIED
IPC: G02B5/22
Filed: 1953-04-29
Abstract: 764,065. Optical filters. MULLARD RADIO VALVE CO. July 22, 1954 [April 29, 1953], No. 11902/53. Drawings to Specification. Class 97(1) Bitumen, tar or pitch or mixtures thereof are reacted with sulphur, selenium or tellurium or compounds thereof to make a filter opaque to visible light but transparent to infra-red radiation. In Example 1 Stockholm tar is heated to remove volatile impurity, dissolved in methylthylketone, and sulphuryl chloride dissolved in benzene is added slowly, followed by heating, to precipitate a rubberlike material which is filtered off, dissolved in methylethylketone, and the solution is poured on to a glass plate to form the filter. In Example 2 the tar is heated with sulphur and the residue dissolved in benzene and applied to a glass plate similarly. Quartz or plastic may be used as support as well as glass, or the reaction product may be used without support or may be incorporated in a support as from a solution of reacted bitumen with polystyrene. Dyes may be included in the filter, and this may be given a protective coating or may be sealed in a housing. Specification 764,066 is referred to.
Patent GB-183576-A (GB)
Title: Improved means for producing illuminated signs, multi-coloured or otherwise
IPC: G09F13/00
Filed: 1921-04-26
Abstract: 183,576. George, F. C., and Baldrey, G. A. April 26, 1921. Label holders; ticket holders.-A sign comprises a box-like structure of triangular prism shape formed' from a metal blank and having reflecting interior walls B, C which may be fluted. Interchangeable translucent insets bearing an advertisement, price, &c. are mounted in the front of the sign, and light from extraneous sources is admitted through the back. The back may be open or may be covered by a singlecoloured or multi-coloured piece of celluloid, mica, glass, &c. The insets are held between flanges C' and the spring front A of the sign, and the coloured back is secured by bent-over projections B<1>, C2. An extension B<2> may be provided for attaching the sign to any object.
Patent GB-265432-A (GB)
Title: Improvements in floats for trawl nets
IPC: A01K73/04
Filed: 1926-05-07
Abstract: 265,432. Leggett, G. E. P., and Thomas, J. H. May 7, 1926. Trawling-gear.-A spreader comprises a hollow open-ended truncated cone made of leather at the smaller end of which three glass ball floats encased in rope mesh are attached by four ropes spaced equally around the cone.
Patent GB-287348-A (GB)
Title: Improvements in or relating to net-making machines
IPC: D04G1/00
Filed: 1927-05-04
Abstract: 287,348. Saibi Mojiami Kabushiki Kaisha, and Kakuda, S. May 4, 1927. Net-making machines.-To assist in laying the strands of interlocked knotless netting two reciprocating notched bars 9, 10 are arranged so that the points to which the strands converge lie within the space enclosed by the notches. The bars are traversed simultaneously in opposite directions respectively one-half and one and a half times the distance between these points. Specification 153,492 is referred to.
Patent GB-491305-A (GB)
Title: Improvements in and relating to presses for cutting sheet metal
IPC: B21D28/08
Filed: 1938-04-22
Abstract: 491,305. Metal-cutting presses. RHODES, C. J. April 22, 1938, No. 12106. Addition to 490,291. [Class 83 (iv)] In lieu of automatically starting and stopping the punching mechanism and automatically taking sheets from a pack, as described in the parent Specification, the punching mechanism is manually actuated and manual or pedal operated control means is provided for actuating the gripping or releasing of the sheet. The pressis of the stagger type with step by step feed for the sheet first in one direction and then after displacement in the reverse direction. As shown, a gravity feed press has an inclined gravity slide 6, Figs. 1 and 2, and a transverse slide 2. Timed relationship exists between the movement of the sheet and the operation of the punch over the die x. An inclined cylinder 19 is provided with a piston 20 the rod 21 of which is connected to a forked member 22 engaging a pin 22a on a bell-crank 22b pivoted on the grav. ity slide and provided with an arcuate slot 22c formed concentrically with the pivot and engaging a pin 25 fixed on the gravity slide. The fork is maintained in the normal position shown in Fig. 2 by compressed air from cylinder 19 and valve 19a. In operation a pedal 41 is depressed and operates the valve 19a to cut off compressed air from the lower end of the cylinder 19 and open it to atmosphere. Thereby the piston 20, and piston rod 21, descend and with them a square rod 23 and forked member 22. The gravity slide is allowed to descend until a pawl 15 engages the uppermost of a number of projections 14. Thereafter the piston rod and forked member continue to descend until the latter has swung the bell-crank 22b to cause the grippers to grip the upper edge of the sheet. The usual hand lever is then operated to start the punching.
Patent GB-1173077-A (GB)
Title: Production of beta-Lactones
IPC: C07D305/14
Filed: 1967-03-15
Abstract: 1,173,077. #-Lactones. BADISCHE ANILIN- & SODA-FABRIK A.G. 15 March, 1967 [16 March, 1966], No. 12123/67. Heading C2C. A process for the production of #-lactones of general formula where R<SP>1</SP> and R<SP>2</SP> are aliphatic, cycloaliphatic, araliphatic, or aromatic radicals with up to 12 carbon atoms, or jointly may be members of a five- or six-membered cycloalkane ring, comprises contacting carboxylic acid esters of #-hydroxycarboxylic acids of general formula where R' and R<SP>2</SP> have the meanings given above and R<SP>3</SP> is hydrogen or an aliphatic, cycloaliphatic, araliphatic or aromatic hydrocarbon radical with up to 8 carbon atoms with oxides of elements of Groups IIl A  or IV A  or of titanium or zirconium of the Periodic Table, phosphates of elements of Group IIIA, or silicates of metals of Groups I A , IIA or IIIA at temperatures of 150-350 C. in the gas or liquid phase. Examples of lactones prepared by this process are pivalolactone, α-methyl-α-n-propyl-#-propiolactone, 2 - oxa - 4 - spiro - [3,5] - nonanone - (1) and α-phenyl-α-ethyl-#-propiolactone.
Patent GB-302536-A (GB)
Title: Improvements in multiple blade saw frame for marble and stone sawing
IPC: B28D1/06
Filed: 1928-04-25
Abstract: 302,536. Maggi, E. April 25, 1928. Addition to 280,979. Sawing.-The construction of the parent Specification is modified by placing the supporting links R at one end of the saw frame instead ot near the middle.
Patent GB-570650-A (GB)
Title: Polymerized material
IPC: C07C7/148
Filed: 1941-09-19
Abstract: Butadiene is purified to remove acetylenic compounds therefrom by treating it with mercuric oxide in presence of water, a mineral acid such as sulphuric acid, and a ferric salt such as ferric sulphate as oxidising agent.  The purified product is polymerized either alone or with acrylonitrile to produce rubber-like masses.
Patent GB-693611-A (GB)
Title: Manufacture of alkylene imine esters
IPC: C07D203/08
Filed: 1950-05-02
Abstract: The invention comprises new alkylene imine addition products with the esters of a  : b -olefine monocarboxylic acids with polyhydric alcohols, the imino group becoming attached to the a -position.  One of the simplest of such products has the formula <FORM:0693611/IV (b)/1> being derived from the ethylene glycol ester of acrylic acid and ethylene imine.  The reaction takes place readily with heat and the imine may be used in excess as solvent, and with or without catalysts.  In examples, ethylene imine reacts with acrylic 1 : 3-butylene glycol ester, ethylene biscrotonate, 1 : 4-butylene bis-crotonate, glycerol crotonate, 1 : 2-propylene imine reacts with glycol biscrotonate, and ethylene imine with diethylene glycol biscrotonate.  Alkylene imines specified also include 1 : 2-butylene imine, 2 : 3-butylene imine, 1 : 1-dimethylethylene imine, C-butylethylene imine and other 1 :2-alkylene imines. Esters specified also include propylene glycol-, 1 : 3- and 1 : 4-butylene glycol-, 1 : 6-hexamethylene glycol-, dihydroxydiethyl sulphide-, 1 : 3 : 5 - hexanetriol-and pentaerythritol-esters of methacrylic, tiglic, b  : b -dimethylacrylic, a -cyancrotonic, sorbic, a -cyansorbic, and cinnamic acids.  The products are poly-alkylene-iminoaliphatic or araliphatic polyesters in which the aliphatic chain may include -O- or -S-, according to the polyhydric alcohol ester employed.
Patent GB-591319-A (GB)
Title: Improvements in or relating to sliding friction bearings
IPC: F16C33/12
Filed: 1945-05-15
Abstract: 591,319. Bearings. AKTIEBOLAGET PULVERKEMI. May 15, 1945, No. 12170. Convention date, April 26, 1944. [Class 12 (i)] A sliding friction bearing includes an element having two sliding surfaces co-operating with two surfaces relatively to which it is rotating, one of the sliding surfaces being of self-lubricating sintered iron. The bearing may include several sliding rings alternately of sintered iron and of steel, Fig. 2 showing a steel shaft 11 rotating in a sintered iron race 14 with sliding rings 12, 13 of sintered iron and of steel disposed in between. The inner ring 12 may be pressed on to the shaft 11. A sliding ring 42, Fig. 5, may be inserted loosely in a steel race 43 and may be retained by end plates, or by deforming the ends of the race by upsetting or by grooving at 44. In a self-adjusting bearing, a shaft 61, Fig. 7, may be inserted in a ring 62 of sintered iron rotating in a two part ring 63, the two parts being held together by snap over springs or by screws 65. The ring 62 may be pressed on to the shaft 61 and in this case, the ring 63 rotates in a sintered iron member 64 secured in the seat of the bearing. A shaft 71, Fig. 8, may rotate in a sintered iron ring 72 rotating in a race 73 closed at one end by a plate 74 and at the other by a plate 75 carrying a ball 76 to carry axial thrusts. In another thrust bearing, a shaft 91, Fig. 11, rotates in a sintered iron ring 92 having a flange to take up axial thrusts transmitted by a plane or other washer 94. In the above examples, the ring may be entirely of sintered iron, or may be of composite structure, one layer consisting of sintered iron and the other of another material, the two layers being sintered or pressed together or otherwise united.
Patent GB-1222795-A (GB)
Title: Warning signal indicators
IPC: G08B1/08
Filed: 1969-03-08
Abstract: 1,222,795. Audible signalling apparatus. VEHICLE SAFETY SYSTEM Inc. 8 March, 1969, No. 12336/69. Heading G4F. An arrangement to enable an audible warning signal outside a vehicle to be heard inside the vehicle comprises a microphone mounted on the outside of the vehicle, an electrical circuit connected to a loudspeaker mounted inside the vehicle, and a switch associated with a window of the vehicle, so that the device operates only when the window is closed. A resiliently mounted microphone is so arranged on the outside of the vehicle as to avoid contact with rain and dust and with the windstream. Switches for disconnecting the device are mounted in the recess into which the window fits when closed, on the edges of overlapping window panes, and between the door and door frame. On turning off the engine of the vehicle, the device is made inoperative by means of a relay operated switch. In another embodiment, Figs. 14-18 (not shown) the entire device, including microphone, loudspeaker, electric circuit and batteries, is arranged in a self-contained unit which is mounted over the top of a movable window pane. A suitable electrical circuit is described with reference to Fig. 19 (not shown). Means may be provided for disconnecting a radio or tape player in the vehicle when a warning signal is picked up by the microphone, or for filtering out unimportant ambient sounds; such means comprise an adjustable level detector, an oscillator emitting an inaudible sound, a reed relay, and another microphone. The device is described for use with road vehicles, but reference is also made to its use in water craft.
Patent GB-329789-A (GB)
Title: Improvements in passenger-carrying amusement apparatus
IPC: B29B11/14
Filed: 1929-04-22
Abstract: 329,789. Bradshaw, G. April 22, 1929. Railways and tracks for recreation. - In a gravity railway the cars are in the form of sledges supported by wheels adapted to run in a hidden guide on one side of the sledge only and having runners to move just above an imitation track arranged around a structure simulating an iceberg or alpine scene. The cars comprise two runners 8, 9 mounted below, and bars 11 above two axles 6, 7 to which are rotatably fixed wheels 4 running in guides 2, 3, which are so arranged in the structure built of girders, stays, etc., that only the slot through which the axles pass is visible. A track 16, broken in places 17, 22, and passing through tunnels 19 is provided just below the sledges, and for novelty is broken in places, the sledges thus appearing to jump over a gap. Other scenic effects including running water. mirrors, paintings etc. may be used over the course.
Patent GB-873719-A (GB)
Title: Sheet separator device
Inventor: STUCKENS LEO JOSEPH
IPC: G03B27/24
Filed: 1959-04-13
Abstract: 873,719. Feeding and delivering sheets. AMERICAN PHOTOCOPY EQUIPMENT CO. April 13, 1959, No. 12408/59. Class 100(1) Apparatus for separating one sheet from two or more superimposed sheets, wherein one sheet has its leading edge projecting beyond the other sheet or sheets, comprises a member mounted for movement to either of two alternative positions and adapted to be moved from a first position to the second position when the said projecting edge engages the member, the member being so shaped that the sheet with the projecting edge is guided for movement in one direction and the other sheet or sheets is or are guided for movement in another direction. As shown in Fig. 1, two superimposed sheets L, T, which have been fed or have issued from a photocopy, or reproducing machine, are guided by rollers 25, 26 to impinge upon a separator member 28 which is freely pivoted on a shaft 27 and retained, against the action of gravity, in a first position by an adjustable stop 30. The leading sheet L strikes the face 35, is directed into a notch 36, and then rocks the member 28 counter-clockwise, whereby the sheet L is directed upwardly, and the sheet T is directed downwardly by a lip 38 along a camera surface 39. In modifications (a) the sheets L, T are fed by a feed belt and cooperating roller and between a pair of guide plates towards the separator member, and the operating face of the latter is shaped differently; (b) the separator member is rocked downwardly against the action of a return spring. Fig. 9 shows a separator member comprising a flat spring-steel or other resilient plate 333 secured to a fixed support 331, and secured to the free end thereof is a plate which is curved at 328 and has a straight portion 329. The leading edge of the sheet L engages a notch 336 between the parts 328, 329, then bends the plate 333 upwardly, whereby the sheet L follows the contour of the part 335, and the sheet T then passes below the edge of the part 329. As shown in Fig. 12, the separator member 628 is slidably mounted within a fixed tube 634, against the action of tension springs 625. Sheets L, T are fed between guides 640, 641, and the leading edge of sheet L engages a notch 620 to depress the separator 628, whereupon the sheet L is guided by a face 622 for movement between the guide 640 and a guide 642, and the sheet T is diverted by a face 623 for movement between the guide 641 and a guide 643.
Patent GB-1079235-A (GB)
Title: Improvements in arc welding electrodes
Inventor: BLAKE PAUL DESMOND
IPC: B23K35/04
Filed: 1964-03-24
Abstract: A fluxless ferrous electrode for use in unshielded arc welding comprises 0.8-25%, Mg, 1.2-8% deoxidizing metal, 0.4-2.4% Mn and 0.1-1.01% Si. The deoxidizing metal is one or more of Al, Ti, Zr. The electrode may be a single alloy wire or strip; a mild steel tube filled with the following core mixtures:- <TABS:1079235/C6-C7/1> or a mild steel core with a coating of .Mg.40%.40% .Al.20%.- .Zr.-.10% .Ti.-.10% .Mn.15%.15% .Si.10%.10% .Fe.15%.15% In the latter case powdered coating metals are applied to the core using an adhesive and are fused in a furnace in an inert atmosphere.
Patent GB-289882-A (GB)
Title: Improvements in or relating to installations for rectifying alternating current
IPC: H02M7/04
Filed: 1928-04-28
Abstract: 289,882. Naamlooze Vennootschap Philips' Gloeilampenfabrieken. May 6, 1927, [Convention date]. Vacuum tubes.- Gas-filled discharge tubes with an incandescent cathode and one or more anodes for rectifying alternating currents have the distance of the cathode 2 from the anode 3 so large that reverse discharges are prevented and one or more auxiliary electrodes 4, 5 are provided to assist ignition. The electrodes 4, 5 are connected to the anode 3 through an auxiliary discharge rectifier 6 so connected that current can pass from the cathode 2 to the electrodes 4, 5 and then through the rectifier 6 to the anode 3 so that the electrodes 4, 5 are charged positively. When no current passes through the main tube 1, no current passes through the tube 6 and no potentials are produced on the electrodes 4, 5 tending to assist reverse discharges. High resistances 11, 12 are connected in series with the tube 6 to limit the current through it and a steadying resistance 10 is arranged in the main circuit from the secondary 9 of the supply transformer to the tube 1. Condensers 13, 14 between the cathode 2 and electrodes 4, 5 strengthen the auxiliary discharge. The tube 1 may be filled with rare gas at a pressure of 3 cms., the cathode 2 being coated with electron-emitting material. The tube 6 may be a high-vacuum rectifier.
Patent GB-128779-A (GB)
Title: Improvements in or relating to Machines for Drilling or Punching Holes for Rivets or the like.
IPC: B23Q16/04
Filed: 1918-07-31
Abstract: 128,779. Vickers, Ltd., and McKechnie, Sir J. July 31, 1918. Punching; spacing racks and like bars.-A machine for punching spaced holes in bars and the like has also means whereby the punching devices may be set to punch subsidiary holes and then be caused to resume the normal position for the standard pitch of holes. The machine comprises a reciprocating member b for carrying the bar and punching devices f, g adjustable in guide j on the bed. The machine is described with reference to drilling, and the drill heads are reciprocated with the member b by a spindle i and yoke h and are adjustable independently in the yoke by screws k, l. The drills are rotated by friction gearing through belt gearing from a driving spindle i<1> having a fast and loose pulley and may be adapted to be fed to and from the work simultaneously by means of lever gearing p, Fig. 3, and rack gearing (not shown), in which case they are not adjustable independently.The work after being fed forwards is gripped between a lower jaw q<1> carried on an adjustable stop device s<1> and an upper jaw p' reciprocated in guides in an independently adjustable frame p<x> by means of an eccentric and linkage from a handle x<1> on the main lever d which reciprocates the member b. The same handle also disengages a positioning punch m<11> from the work at the same time as it lifts the jaw p<1> and so allows the work be fed forward again. The jaw is held on to the work by a spring g<xx>, Fig. 1, and to prevent the work being fed while still gripped by the jaw a safety catch a<11> is inserted which prevents motion of the feeding lever d before the handle is operated to release the grip. The work is fed by a reciprocating gripper carried by the member b and its motion is limited by a stop b<x> on it engaging the adjustable stop r<1>. For punching subsidiary holes the yoke h is moved on the spindle i by a rack and pinion against the pressure of a spring e<111> and is held in any required position by a pawl d<111> engaging grooves in a sleeve a<111> which is mounted against rotation on the spindle i. After the subsidiary holes are punched the pawl is released and the spring e<111> returns the heads to the normal position.