baber/WOPTO huggingface dataset:
Patent GB-1530920-A (GB)
Title: High power thyristors
IPC: H03K17/0814
Filed: 1975-12-16
Abstract: 1530920 Protecting thyristors GENERAL ELECTRIC CO 16 Dec 1975 [18 Dec 1974] 51418/75 Heading H2F A surge protected thyristor 1 is bridged by the series arrangement of a switching means 62, having a breakdown voltage nearly equalling the reverse breakdown level of thyristor 1, and a non-linear resistance 61 having a characteristic relative to said thyristor 1 such that only a safe reverse current flows in thyristor 1. As described, each thyristor 1 of a plurality of series-connected thyristors in a converter of a HVDC link is bridged by the series arrangement of an auxiliary thyristor 62 and two metal oxide varistors 66. The protective circuit is arranged to break down at 2-8 kV which is slightly greater than the maximum repetitive reverse voltage allowable for the thyristor 1. Each varistor 66 is formed of a sintered ceramic containing zinc oxide and bismuth oxide and has a characteristic:- where C equals the magnitude of V when I equals 1 amp and the exponent a is a number greater than 10. The protective circuit 62, 66 is arranged to divert, from the main thyristor 1, between 60 and 99% of the total reverse current. The thyristor 62 may be bridged by a resistor 67. In Fig. 3a, the gate of thyristor 62a is triggered by a further thyristor 68. A lightning arrester may be connected across the series plurality of main thyristors 1.
Patent GB-1031387-A (GB)
Title: Improvements relating to index tabs
IPC: B42F19/00
Filed: 1963-12-31
Abstract: 1,031,387. Index tabs; suspension files. RUEGG-NAEGELI & CIE A.G. Dec. 31, 1963 [Jan. 8, 1963], No. 51440/63. Heading B6E. An index tab comprises a carrier 1 and a transparent cover 2 fixed to the carrier along its lower edge and shaped so as to clip over the upper edge of the carrier. The index tab is glued or stapled to a card by an inverted U- shaped strip 5 secured between the limbs of the carrier. In a modification, the carrier extends beyond the cover at each end and terminates in hooks to form a suspension rail, Fig. 2 (not shown). The strip 5 is omitted and studs on one limb of the carrier engage apertures on the other limb whereby sheets may be retained between said carrier limbs. The carrier may be formed of transparent material. In addition, the carrier may be a simple strip or formed in one piece with the carrier.
Patent GB-1481444-A (GB)
Title: Receiving station equalization arrangement
IPC: H03H7/01
Filed: 1974-11-28
Abstract: 1481444 Equalization arrangement RANK XEROX Ltd 28 Nov 1974 51687/74 Heading H4R The equalization arrangement is the same as that of Specification 1,421,917, but the delay networks used have their respective maximum delays occurring at the same frequency. The maximum delays differ, and may be related on a binary basis.
Patent GB-1294708-A (GB)
Title: Method for the preparation of chlorinated benzene
IPC: C07C17/12
Filed: 1970-10-30
Abstract: 1294708 Hexachlorobenzene preparation JEFFERSON CHEMICAL Inc 30 Oct 1970 [3 Nov 1969] 51730/70 Heading C2C Hexachlorobenzene is prepared by reacting a diluted mixture of benzene and chlorine at a temperature of at least 400‹ C.
Patent GB-1082668-A (GB)
Title: Improvements in or relating to ventilating jacks
IPC: E04D13/17
Filed: 1964-12-23
Abstract: 1,082,668. Ventilators. J. A. WILLEMSE. Dec. 23, 1964, No. 52363/64. Headings F4J and F4V. A ventilator for a concrete roof 1 with a spaced insulated layer 2 comprises an inner tube 5 with flange 10, supported on the layer 2 and projecting through to the cavity 3, this tube having also three upper webs 7 and three lower webs 8, a cap 9 integral with an outer tubular member 6 spaced from the tube 5 by webs 7, 8 and having slots 12. A ring 11 on the tube 5 prevents water being blown up the tube from the roof. The unit is made from polyvinyl chloride.
Patent GB-1502869-A (GB)
Title: Wall construction
IPC: E04B1/61
Filed: 1975-12-24
Abstract: 1502869 Structural joints IBERICA DEL FRIO SA 24 Dec 1975 52831/75 Heading F2M [Also in Divisions E1 and F4] Panels for forming the walls of cold storage rooms are connected together via blocks 3 embedded in the panel edges and retaining plates 7 which pass through slots 5 in aligned blocks and are retained by fasteners 8 having a threaded portion engaging in the block and a frusto-conical shoulder 11 which engages a frusto-conical lead-in portion of a hole 10 in the plate to draw the two panels 2, being interconnected, together. The panels have walls 2 of, e.g. metal, with resilient strips 14 extending along edges thereof, and having flanges 15 which engage in slots 4 of the blocks 3. The panels are filled with polyurethane foam 19.
Patent GB-533091-A (GB)
Abstract: 533,091. Wheel rims. TYRESOLES, Ltd., and BAKER, A. W. Oct. 5, 1939, No. 27281. [Classes 144 (i) and 144 (ii)] A wheel-rim for holding a pneumatic tyre during re-treading or other repair is formed in two telescopic parts a, b fitted with devices such as hooks f, g which are held interlocked by the inflation-pressure of the assembled tyre against flanges c, d. One or both of the rim-parts may have an additional set of hooks f' for varying the operative width of the rim, and handles h may be provided on one of the parts. The hooks may be replaced by studs and bayonet-slots.
Patent GB-1136627-A (GB)
Title: Tire building machine and method
IPC: B29D30/58
Filed: 1965-12-16
Abstract: 1,136,627. Building pneumatic tyres. GENERAL TIRE & RUBBER CO. 16 Dec., 1965 [5 Jan., 1965], No. 53440/65. Heading B7C. Tyre building apparatus comprises a transfer ring 31 for carrying a tread and breaker from the drum 2 on which they were built to surround a carcass on a building and shaping drum 1 (see Specification 1,136,630). The ring 31 (see Specification 1,136,629) is suspended by a frame 3 movable along stationary parallel rails 4 by a chain 15 driven by motor 319. The drum 2 comprises a circumferential series of rigid segments (221), (Fig. 3, not shown), surrounded by an elastomeric sleeve (227) and radially expansible by two cord-reinforced bags (209) each divided into interconnected radially inner and outer chambers. Specification 1,035,989 is also referred to. Reference has been directed by the Comptroller to Specification 932,792.
Patent GB-535099-A (GB)
Abstract: 535,099. Separation of organic compounds. KODAK, Ltd. Oct. 13, 1939, No. 27886. Convention date, May 25. [Class 2 (iii)] [Also in Groups I, III and VI] To concentrate solutions or colloidal dispersions or to separate constituents therefrom the solutions are caused to foam and the foam allowed to drain until the constituents have become segregated at different levels in the foam. A section of the foam richest in the required constituent is then removed and the constituent isolated therefrom. Solution in a tubular container built up of sections 1a, 1b, 1c, Fig. 3, connected by rubber sleeves 6 is caused to foam by air or other gas introduced as bubbles through a ceramic filter 2. The foam drains under gravity during or after its production. The foam layers may be removed separately by detaching the sections of the tube, or foam may be driven over into a tube 9, where it is broken down, the resultant liquid being collected in a container 12. The container may be provided with heating or cooling means, and the tube 9 is jacketed for heating. Fig. 6 shows apparatus comprising a vessel 1 in which the foam is produced and a sectional tube 23 in which it collects and drains. The liquid collecting at the bottom of the tube 23 may be passed by a pump 27 back to the vessel 1 or by a pump 32 for treatment in similar apparatus of smaller dimensions. The vessel 9 where the foam is broken down is. fitted with a heating coil 11. Fig. 7 shows apparatus with a series of foam collecting and draining tubes 23, 33, 34. The process can be applied for separation of different proteins, for example, the polymers of polypeptide, the separation of proteids from solutions of crude gelatine, the removal of silver from solutions of colloidal silver containing proteins as protective colloids, the fractionation of colouring matters, for example of mixtures of tri-, tetra-, penta- and hexa methyl-pararosanilines, the isolation of substances contained in physiological liquids, for example proteids or lipoids from blood serum, enzymes, viruses, hormones and vitamins, and the extraction of albuminoids, bile pigments and certain hormones (oestrone, androsterone, testosterone) from urine. Specification 498,643 is referred to.
Patent GB-1363819-A (GB)
Title: False twist crimper tube for texturing synthetic fibres
IPC: D02G1/06
Filed: 1972-11-20
Abstract: 1363819 False twist tubes METALLWERK PLANSEE AG & CO KG 20 Nov 1972 [18 Jan 1972] 53547/72 Heading DID A false-twist tube to be driven by friction discs is made of a soft magnetisable material and at least the surfaces which contact the discs are coated with a wear-resistant material. This material may be a carbide, nitride or boride of metals of group IVa-VIa of Mendeljeff's Periodic Table in the proportion of 70 to 100% the remainder being a softer binder metal. The wear resistant surface may be deposited from the gas phase details of which are given.
Patent GB-1150098-A (GB)
Title: Process for Dyeing and Printing Material made of or containing Polymers or Copolymers of Acrylonitrile and/or Asymmetric Dicyanoethylene
IPC: D06P3/76
Filed: 1966-12-02
Abstract: 1,150,098. Dyeing polymers of acrylonitrile and/or dicyanethylene. CIBA Ltd. 2 Dec., 1966 [2 Dec., 1965; 14 Oct., 1966], No. 54005/66. Heading D1B. Polymers of acrylonitrile and/or asymmetric dicyanoethylene are dyed or printed using a water soluble dyestuff which is free of acidic groups which confer water-solubility on the molecule and which contains a residue of formula:- wherein R 3 , R 4  or R 5  each represent an alkyl or phenalkyl group, or two or three of which residues together with the nitrogen atom may also denote a heterocyclic ring e.g. pyridine, X denotes an anion and n a number not greater than 8. Specified dyestuffs containing the group are anthraquinone, nitro styryl and particularly azo dyes. Red, yellow, blue shades are obtained. Reference has been directed by the Comptroller to Specification 789,263.
Patent GB-1012533-A (GB)
Title: Improvements relating to inductive signalling systems
IPC: B61L3/12
Filed: 1964-02-06
Abstract: 1,012,533. Track apparatus. COMPAGNIE DES FREINS ET SIGNAUX WESTING- HOUSE. Feb. 6, 1964 [March 15, 1963], No. 5042/64. Heading B7N. [Also in Division H4] An inductive signalling system for selectively transmitting -signals of different frequencies graded in frequency in accordance with their order of priority, e.g. to a remote signal beacon or a railway locomotive, is provided with means for remote control of the frequency selecting circuits and is arranged so that in the event of failure of the frequency selecting arrangements the signal frequency is determined by a tuned circuit at the remote point and is a frequency which corresponds to a signal of higher or the highest priority. As shown in Fig. 2, resonant circuit C5, 5<SP>1</SP> is tuned to the frequency representing the highest priority and is coupled via an inductor 5 to a plurality of capacitors 4, to 4n which are selectively switched into circuit by switches I 1  to In as required. An amplifier 8 is coupled via windings 6, 7 to the circuit C5, 5<SP>1</SP> and oscillates at the frequency selected by the switches, or failing that, at the frequency determined by the circuit C5, 5<SP>1</SP>. The switches I 1  &c. control the control windings 12, to 12n of saturable reactors 3 1  to 3n. The arrangement is such that with switch I 1  operated all the capacitors are effectively in series and with switch In operated only capacitor 4n is connected, a transistor switch T being operated when any of the switches I 1  &c. is operated. Diodes 22 to 22n isolate the various circuits. In a modification the transistor switch is replaced by a further saturable reactor and the diodes 22 &c. are dispensed with. The switches I 1  &c. and battery S may be in a box at a control point remote from the switched circuits.
Patent GB-1372696-A (GB)
Title: Pneumatically operable gating mechanism
IPC: B23Q7/16
Filed: 1970-11-14
Abstract: 1372696 Pneumatic conveyers; discharging articles ROEVAC-BELL Ltd 12 Nov 1971 [14 Nov 1970] 54298/70 Headings B8A and B8S A gating mechanism for controlling the supply of oriented screws 18 one at a time from a supply line 16 into a pneumatic conveyer line 24, comprises a spool valve movable between two positions in response to pneumatic pressure, and an air feed line 28, the spool valve being arranged such that in one position the air feed line 28 is connected to the conveyer line 24 and in the other position the supply line 16 is connected to the conveyer line 24 whilst the air feed line is closed. The leading screw 18 abuts against a bar parallel to the spool of the valve and movable therewith, the bar having a contoured gap therein whereby as the spool and thus the bar is moved to couple the supply line 16 to the conveyer line 24, one screw passes through the gap and through the spool valve into the line 24, whereafter it is pneumatically conveyed once the spool is returned and the air line 28 becomes coupled to the line 24. This gating mechanism is used in conjunction with an air operated screw driver, Fig. 3 (not shown) the screws being conveyed to the nose of the screwdriver through the line 24, and a pneumatic ram controlling the spool valve being operated in response to depression of the screwdriver, which is formed of telescoping parts to turn a delivered screw. The said depressing action operates a switch to energize an air motor driving the screwdriver, and this air flow causes a pressure differential in the pneumatic control circuit of  the spool valve ram, whereby the ram moves the valve to shut off the conveying air supply and deliver a screw into the conveyer line 24, the spool valve being returned and the screw being conveyed once the air motor is switched off and the screwdriver is ready to receive another screw.
Patent GB-1159400-A (GB)
Title: Gelling Silicates
IPC: C03C25/26
Filed: 1966-12-05
Abstract: 1,159,400. Silicate composition. PROGIL. 5 Dec., 1966 [28 Dec., 1965], No. 54371/66. Heading C1A. [Also in Division E1] A liquid or gelled composition comprises an aqueous alkali metal silicate solution and, as gelling agent, a dialkyl succinate in which each alkyl radical contains 1-5 carbon atoms, and/or the reaction products of these two components. The preferred gelling agent is dimethyl succinate. The alkali metal silicate may be sodium, potassium or lithium silicate in which the SiO 2  : M 2 O molar ratio is 2À0- 5.0 1. The proportion of dialkyl succinate in the composition may be 5-50 parts by weight per 100 parts of dry alkali metal silicate. This composition may also contain a second (known) gelling agent (e.g. ethyl acetate, ethylene glycol acetate, diacetin, or triacetin) to the extent of up to 40 parts by weight per 100 parts of total gelling agent. The composition may be prepared by introducing an aqueous solution of the gelling agent into a 25-40% by weight aqueous solution of the alkali metal silicate.
Patent GB-1245987-A (GB)
Title: Apparatus for measuring the dry units weight of a soil and a method of using it
IPC: G01N27/04
Filed: 1968-11-20
Abstract: 1,245,987. Resistive analogue computers. LOSENHAUSEN MASCHINENBAU A.G. 20 Nov., 1968 [29 Nov., 1967], No. 55072/68. Heading G4G. [Also in Division G1] Apparatus for measuring dry unit weight γt or moisture content of a test sample of soil includes an analogue computer network 8-18 which simulates the law: where γt 1 , γt 2  are the dry unit weights of two soil samples of known weight or moisture content; g = γt 1 /γt 2 ; I is the conduction current through a measuring probe 6 in the test sample; I 1 , I 2  are conduction currents in probes in first and second known soil samples. A selected measuring probe is energized from a constant voltage A.C. source including an oscillator 1 and an amplifier 2 and the voltage drop due to probe current flow through a measuring resistance 3 is measured by phase-sensitive rectifier 14.
Patent GB-1132280-A (GB)
Title: Thermo-responsive fluid flow control valve assemblies
IPC: G05D23/02
Filed: 1966-12-15
Abstract: 1,132,280. Valves. GENERAL MOTORS CORP. 15 Dec., 1966 [30 Dec., 1965], No. 56193/66. Heading F2V. A thermo-responsive valve for an I.C. engine comprises a closure member 48, loaded to the closed position by a spring 50, and opened by a power device 60 arranged on to outlet side of the valve, and moving with respect to a fixed spindle 62. The device 60 has a wax-filling 66, and is surrounded by a sleeve of heat insulating material 54, e.g. of plastics material, with sufficient clearance to allow a bleed passageway 70, 72 which by-passes the valve.
Patent GB-1322870-A (GB)
Title: Stripper means for meat skinning machines
IPC: A22C17/12
Filed: 1971-12-03
Abstract: 1322870 Skinning machines TOWNSEND ENG CO 3 Dec 1971 [3 Sept 1971] 56310/71 Heading A2U  In a meat skinning machine in which skin 28 severed from the meat 18 by a knife 22 is withdrawn between a pressure shoe 24 and a driven, toothed roll 26, the latter having a plurality of grooves 32 engaged by blades 40 which strip the skin from the roll, the blades are individually detachably mounted on a fixed shaft 36 which has grooves 38 into which recessed portions 50 of the blades are snapped. The blades may be made of plastics material so that they will fracture rather than damage the roll 26 should they encounter an extremely tough piece of skin.
Patent GB-1448997-A (GB)
Title: Pumps looms
IPC: F04B49/00
Filed: 1973-12-10
Abstract: 1448997 Fluid-pressure servomotor systems SPERRY RAND CORP 10 Dec 1973 [18 Dec 1972] 57063/73 Heading G3P A pump 10 is provided with a servomotor 12 for adjusting the pump displacement under the control of a pilot valve 18 containing a piston having a face 32 subject to pump output pressure in line 14 via lines 20, 38 and an opposite face 34 subject to that pressure via lines 20, 40 and restriction 42. Should there be an increase in pump output pressure the valve piston is urged leftwards against spring 36 causing liquid to be displaced from chamber 37 through line 40 into line 20. Because of a further restriction 50 this additional flow results in a pressure increase in line 40 which reduces the pressure differential across the valve piston and thus retards the motion thereof. The higher the rate of pump pressure increase the greater will be the retarding action on the valve piston thus minimizing pressure overshoot which would, result from an excessive rate of pump displacement adjustment. The pressure downstream of restriction 42 is limited by an adjustable relief valve 44 which is set such that there is always a small bleed flow through restrictions 42, 50 to drain line 26. Restriction 50 could be upstream of relief valve 44.
Patent GB-1380698-A (GB)
Title: Ceramic compositions
IPC: C04B35/50
Filed: 1971-12-10
Abstract: 1380698 Ferroelectric compositions MURATA MFG CO Ltd 10 Dec 1971 [25 Dec 1970 30 Aug 1971] 57428/71 Heading C1J A ferroelectric composition comprises xPb(Nb α Cr 2-3 αMn 2 α -1 )O 3 .yPbTiO 3 .zPbZrO 3  in which x, y and z are the respective molecular ratios of each component, x + y + z = 1À00 and ¢<α<<SP>2</SP>/ 3 , the composition having its molecular ratios x, y and z falling within the hexagon ABCDEFG of Fig. 1, the sets of molecular ratios at the vertices of the hexagon being as follows Preferably a is 0À625. Such ceramics may be fired at 1200 to 1240 C. thereby minimizing lead evaporation. Typical starting materials are PbO(or Pb 3 O 4 ), Nb 2 O 5 , Cr 2 O 3 , MnCO 3 , TiO 2  and ZrO 2  which may be wet mixed and ball milled prior to firing.
Patent GB-1454415-A (GB)
Title: Semiconductor integrated circuits
IPC: H01L27/07
Filed: 1973-12-12
Abstract: 1454415 Integrated circuits INTERNATIONAL BUSINESS MACHINES CORP 12 Dec 1973 [29 Dec 1972] 57521/73 Heading H1K The circuit elements and conductors of an integrated circuit are so arranged as to reduce the effects of paths displaying reactance which under circuit fault conditions are potentially alternative to substantially reactanceless paths between critical circuit nodes which are monitored in d.c. testing of the circuit, so that such d.c. testing reveals fault conditions which would otherwise be masked by such alternative paths. The reactance of the potentially alternative paths would impair the a.c. functioning of the circuit. Fig. 2 illustrates part of a circuit to which the present invention may be applied. Here a reactive path through resistor R3 and the capacitive emitter-base junction of transistor T3 is potentially alternative, wider d.c. testing, to the reactanceless path through resistor R2 between critical nodes 15 and 16. Various approaches are disclosed to reduce the danger that the alternative reactive path will give a false "pass" outcome in a d.c. test. Fig. 4A illustrates one approach in which a part of the potentially alternative path (viz. part 47 of P type resistive region 26 between contact openings 27 and 46) is in common with a portion of the reactanceless path to which it corresponds (viz. the remainder of region 26, constituting resistor R2). Thus P type part 47, contact opening 27 and metallization 28 are common to both the desired reactanceless path through R2 and the potentially alternative reactive path through R3, and structural failure or absence of any of these components will block both paths and result in failure under d.c. testing. If the addition of resistive P type portion 47 to the path between transistors T3 and T2 is unacceptable on operational grounds on N<SP>+</SP> region 48 between respective parts of contact openings 27 and 48 may be pro-  vided to effectively short circuit these nodes under normal conditions, but in this case absence of P type region 26 would still result in a false "pass" under d.c. testing. A similar approach is adopted in Fig. 5A, in which contact opening 51 is common to both R2 and R3, and the absence of that opening will block both the reactanceless path through R2 and its reactive potential alternative through R3 and T3.
Patent GB-1119400-A (GB)
Title: Parallel comparator
Inventor: JENSEN ALAN KIMBLE
IPC: G06F7/02
Filed: 1966-12-23
Abstract: 1,119,400. Digital comparators. MONROE INTERNATIONAL CORP. 23 Dec., 1966 [2 March, 1966], No. 57709/66. Heading G4M. Bits A1-A32, B1-B32 of two binary numbers A, B are connected as shown to transistors T1a-T32a, T1b-T32b, a transistor on the A side only conducting if the associated A bit is greater than the corresponding B bit, and a transistor on the B side only conducting if the associated B bit is greater than the corresponding A bit. Thus if A32 = 1, B32 = 0, T32a conducts and supplies a "1" output at OA32. Diodes 44 conduct this "1" output to A>B terminal 70 and also to output terminals OA2-OA16. The highest terminal OA having a " 1 " indicates the degree of disparity between numbers A, B. Diodes 42 ensure that none of the lower order transistors on the B side can produce a " 1 " output, by applying a " 1 " to their bases. The B side is similar. A common #A=B terminal 68 is energized via diode 54 or 56 if A>B or B>A.