baber/WOPTO huggingface dataset:
Patent GB-1084028-A (GB)
Title: A method of soldering a semiconductor chip to a backing plate
Inventor: BECKETT LEONARD THOMAS ALEXAND
IPC: B23K1/00
Filed: 1965-11-29
Abstract: 1,084,028. Soldering. STANDARD TELEPHONES & CABLES Ltd. Nov. 29, 1965, No. 50581/65. Heading B3R. In soldering a semi-conductor chip to a larger backing plate a hole is provided in one face of the latter in which a pellet of solder is inserted, the chip is placed in intimate contact with the plate to cover the pellet and heat is applied to melt the solder which is drawn by capillary action into the chip-plate interface. A small hole 4 is drilled or punched in a heat sink 2, a spherical pellet of solder 3 is forced into the hole and a semi-conductor chip 1 is placed over the hole and heat is applied to melt the solder. The solder flows between the chip and the heat sink surface to stop at the edge of the chip, excess solder remaining in the hole. The hole may be blind or merely an indentation in the surface.
Patent GB-1524643-A (GB)
Title: Single lens reflex camera
IPC: G03B7/099
Filed: 1976-12-06
Abstract: 1524643 Exposure control ASAHI KOGAKU KOGYO KK 6 Dec 1976 [9 Dec 1975]  50701/76 Heading G2A In a single lens reflex camera, at least part of the mirrot is semitransparent, and a light-sensitive element is positioned within the mirror box so as to receive light which, when the mirror is raised, is reflected from the shutter and/or the film, and, when the mirror is lowered, receives light reflected from the shutter. Fig. 1 shows the semitransparent mirror 3 in the lowered position. Part of the incident light entering through objective lens 1 is reflected up to the view-finder 6 and eye-piece 7, and part passes through to fall on the front blind of the double blind shutter. This is reflected to a lightsensing element 8 forming part of a circuit which determines and displays the correct exposure time. On pressing the shutter release, the diaphragm is stopped down to a pre-set value, the mirror is raised, position of Fig. 2, and the shutter blinds 9, 10 operated in a controlled sequence to effect an exposure. Blinds 9, 10 and the film 11 all have the same light-reflecting characteristics. In the modification of Figs. (not shown) 3, 4, an additional shielding plate (13) is provided, whose reflection characteristics are correlated with those of the film. In the raised position the plate blocks off light entering the lens 7. Light received by element 8 is biased towards light from the upper part of the scene being photographed, and Fig. 6 shows an arrangement intended to compensate for this irregular light distribution. A small additional mirror 15 is attached to the mounting frame for mirror 3, and reflects light to an additional light-sensing element 8'.
Patent GB-1417572-A (GB)
Title: Self-adhesive bituminous products
IPC: C09J7/38
Filed: 1972-02-11
Abstract: 1417572 Adhesive bitumen-coated materials RUBEROID Ltd 30 Oct 1972 [11 Feb 1972] 50780/72 Divided out of 1417571 Heading B2E [Also in Divisions B5 and C3] A normally self-adhesive product comprises a metal support or carrier having bonded thereon a layer of a self-adhesive bituminous composition comprising a mixture of (i) one or more bitumens which are tacky at 20C and (ii) a brittle and/or waxy polymer present in an amount 0.1-10% by weight based on the one or more bitumens and which is sufficient to raise the softening point of the one or more bitumens without lowering the tack of the one or more bitumens to a point where it will not form an instant bond when brought into hard pressure contact with a substrate at 20C, the polymer being a polyethylene or a crystalline polypropylene and having an average molecular weight of 1,500-4,000. The bitumen is preferably a mixture of oxidised bitumen and straight run bitumen, particularly when the waxy polymer is polyethylene. The composition may also include a plasticising oil, a non-fibrous filler. e.g. slate dust, sand, fly ash or limestone; or a fibrous filler, e.g. asbestos, glass fibres, or cotton linters. The self-adhesive bituminous composition may also include a fire-retardant, e.g. a halogen-containing alkyl benzene. The metal carrier to which the layer of adhesive bituminous composition is applied is prefera'bly a sheet or foil of aluminium, e.g. 0.025- 0.25 mm. thick, copper e.g. 0.05-0.15 mm, thick, zinc, stainless steel or lead, e.g. 0.05- 0.75 mm thick and it may be smooth, dimpled, embossed, pre-painted or pre-lacquered. The carrier may be coated on both sides with both outer faces protected by a release member or paper. The self-adhesive composition is conveniently applied in a thermally softened condition to the metal carrier.
Patent GB-1076191-A (GB)
Title: Multi-stable device
Inventor: SIGORSKY VITALY PETROVICH
IPC: H03K3/29
Filed: 1963-12-24
Abstract: 1,076,191. Valve and transistor multistable state circuits; automatic frequency control systems. INSTITUT MATEMATIKI SOAN USSR. Dec. 24, 1963, No. 50863/63. Headings H3A, H3P and H3T. A multistable state circuit comprises an oscillator arranged to operate at a frequency which is a sub-harmonic of the frequency of an external signal the output of the oscillator being fed to a discriminator so as to control the frequency of the oscillator and thus to control the sub-harmonic of the applied voltage at which the oscillator operates and a control voltage being applied so as to select the appropriate sub-harmonic and hence the required state of the circuit. As shown, the output of the blocking oscillator comprising transistor 6 is fed to a diode pump circuit comprising capacitors 13, 14; diodes 11, 12 and resistor 15 which produces an output voltage across capacitor 14 proportional to the frequency of the oscillator. The voltage across capacitor 14 is fed back to the base of transistor 6 so as to control the frequency which would be linearly related to a D.C. voltage fed to terminal 9. If, however, the oscillator is arranged to be synchronized to a sub-harmonic of a signal applied to terminal 8, variation of the input voltage at terminal 9 causes the frequency to change in steps as shown in Fig. 3, each step corresponding to synchronization by a different subharmonic. The ratio of the charge and discharge time constants of capacitor 14 should be of the order of 10<SP>3</SP>. The transistor oscillator may be replaced by a phantastron.
Patent GB-1124575-A (GB)
Title: Method of applying a glass-joining compound to the connection face of a non-circular tube portion
IPC: H01J5/20
Filed: 1965-12-01
Abstract: <PICT:1124575/C1/1> To apply a glass joining compound to the connection face 5 of a non circular cone portion 4 of a television tube held on a turntable 2 and wherein the glass joining compound flows continuously out of a container 6 with outlet 7 vertically over a part of the face 5 to give a coating of the compound on the face 5, the speed of rotation of the turntable varies and the variation is controlled so that the relative speed between the outlet 7 and the face 5 is substantially constant.  As shown, control of the rotation of turntable 2 is effected from a template 10, corresponding to the tube 4 and on the same axis 15, engaged by a roller 11 on a slidably mounted drive unit 12 having friction wheels 13 and 14 running on the flat faces of the template 10, the wheel 13 being driven at constant speed of rotation from a motor 17, the speed of rotation of turntable 2 therefore varying according to the distance of wheel 13 from the axis 15.  The container 6 is mounted on a carriage 3, moving with the drive unit 12, by means of a sliding mechanism 16 which allows slight displacement and thereby fine adjustment of the outlet 7 with respect to the face 5, a guide roller 8 engaging the edge of the cone 4 which may have slight variations from the template 10.  The container 6 is pivotally mounted on the carriage 3 to allow removal of the cone 4 and an agitator for the glass joining compound in the container is operated by a motor 9.  In place of the roller 11 engaging the edge of template 10, a chain (20) may be clipped to the edge for engagement by a chain wheel (22).  In place of a template, a friction wheel may run directly on a wall section of the cone 4 or the turntable may be directly coupled to a motor giving continuously varied speed of rotation, for example by a template varying a variable resistor.
Patent GB-979349-A (GB)
Title: Improvements in or relating to truck bodies
IPC: B62D33/04
Filed: 1963-12-24
Abstract: 979,349. Vehicle bodies. T. ZIJLSTRA. Dec. 24, 1963 [Dec. 27, 1962], No. 51006/63. Heading B7B. A van body is formed from a number of preformed plastic panels 5, 7 having flanged edges by which they are secured together and extending upwardly and inwardly to form the roof. One of the flanges is preferably turned over as at 30, 34 to form an integral stiffener. The panels are secured to the floor bearers 22 by angle pieces 23 and bolts 24-26, thus allowing for the provision of bodies of different height.
Patent GB-1100826-A (GB)
Title: Aromatic polyamides
IPC: C08G73/22
Filed: 1964-12-16
Abstract: Polyamides of the structural formula <FORM:1100826/C3/1> wherein R is a trivalent aromatic radical with the three valencies coming directly from ring carbon atoms and with the -O and -N links being ortho- or peri-; R1 is H, -R2, -CO.R2 or -C5.R2; R2 is C1- 6 alkyl; and n is sufficient to provide an inherent viscosity of at least 0.1 determined at 30 DEG  C. as a 0.5% solution in H2SO4 may be obtained by heating a compound <FORM:1100826/C3/2> where X1 is Cl, Br or F; X2 is X1 or an acetate, mono-, di- or tri-halo acetate, bisulphite, bisulphate, sulphonate or sulphinate radical; and R3 is aryloxy, below 280 DEG  C. in an inert organic solvent.  Numerous such compounds and solvents are listed.  The resulting solutions may be used as coating composition or to prepare self-supporting films or fibres. The polymers can be cured to polybenzoxazoles as described in Specification 1,100,827.  Reference has been directed by the Comptroller to Specification 1,008,854.ALSO:Polyamides of the structural formula <FORM:1100826/B1-B2/1> wherein R is a trivalent aromatic radical with the three valencies coming directly from ring carbon atoms and with the -O and -N links being ortho- or peri; R1 is H, -R2, -CO.R2 or -C5.R2; R2 is C1-6 alkyl; and n is sufficient to provide an inherent viscosity of at least 0.1 determined at 30 DEG C as a 0.5% solution in H2SO4) may be obtained by heating a compound <FORM:1100826/B1-B2/2> where X1 is Cl, Br or F; X2 is X1 or an acetate, monodi- or trihalo acetate, bisulphite, bisulphate, sulphonate or sulphinate radical; and R3 is aryloxy, below 280 DEG C in an inert organic solvent.  Numerous such compounds and solvents are listed.  The polymers can be cured to polybenzoxazoles as described in Specification 1,100,827.  The polyamides may be applied to substrates, examples of which are given, by doctoring, rolling, dipping, brushing, or spraying.  Reference has been directed by the Comptroller to Specification 1,008,854.
Patent GB-1104582-A (GB)
Title: Improved method of electrolytically producing nickel powder
IPC: C25C5/02
Filed: 1965-12-08
Abstract: In electrolytically producing finely divided Ni powder having a surface area in excess of 3m2/gm, electrolysis conditions include an aqueous electrolyte comprising 90 to 150 mls ammonium hydroxide per litre of solution, at least one Ni anode, at least one metallic cathode (e.g. of Ni or stainless steel which may be in mesh form), and a cathode current density of 0.007 to 0.090 amps/sq.cm. used for a period of 2 to 7 hours.  After deposition the Ni powder is removed from the cathode.  The ammonium hydroxide is the normal reagent grade having a concentration of 28 to 30 weight per cent of ammonia.  After passing current for 2 to 3 hours, ammonium hydroxide may be added to the depleted solution, and current then be passed for a further 2 to 3 hours.  The electrolyte may additionally contain NH4NO3, (NH4)2SO4 and/or nickel ammonium sulphate.  The bath temperature may be from room temperature to 40 DEG C., and if the bath tends to become overheated the electrolysis may be periodically halted.  The anode-cathode spacing may be 1/2 inch plus or minus 1/16 inch. After several successive depositions of Ni powder on a cathode, the cathode can be reconditioned by using it as an anode.  The Ni powder can be used in fuel cell electrodes.
Patent GB-1073036-A (GB)
Title: Broad band coaxial detector assembly
IPC: H03D9/02
Filed: 1965-12-08
Abstract: 1,073,036. Coaxial line measuring apparatus. B.D. FREDERICO. Dec.8, 1965, No.52074/65. Heading G1U. A broadband coaxial detector comprising a coupling resistor 19 and a compensating resistor 24 connected in series between the inner and outer coaxial conductors and a measuring device connected across the compensating resistor, is characterized in that both resistors are uniformly coated film type, having the same incremental inductance. The measuring device may comprise a coaxial diode 21 in series with a calibration resistor 35 and a meter 33, the junction between the diode and resistor 35 being decoupled to earth by a three element capacitance comprising a low frequency tubular capacitor 46, an intermediate frequency capacitor 52 of disc or button type, and a high frequency capacitor formed by dielectric sleeve 37. In order to provide a linear scale on meter 33, the resistor 35 may be a non linear type corresponding in characteristic with diode 21. Alternatively a bolometer may be employed as the measuring device.
Patent GB-1062848-A (GB)
Title: Process for the preparation of chlorotrifluoromethane
IPC: C07C17/10
Filed: 1965-12-08
Abstract: Chlorotrifluoromethane is prepared by reacting chlorine with trifluoromethane at temperatures between 400 DEG  and 800 DEG  C. Dichlorodifluoromethane is obtained as a by-product.
Patent GB-1180775-A (GB)
Title: New Derivatives of 4-Oxo-1,2,3,4-Tetrahydroquinazoline and Preparation Thereof
IPC: C07D239/91
Filed: 1967-11-17
Abstract: 1,180,775. 1 - Aminoalkyl - 4 - oxo -1,2,3,4 - tetrahydroquinazolines. TANABE SEIYAKU CO. Ltd. 17 Nov., 1967 [19 Nov., 1966 (2)]. No. 52494/67. Heading C2C. Novel compounds of formula and acid addition salts thereof, wherein Ar is phenyl, tolyl or xylyl and R 1  and R 2  are alkyl or together are pentamethylene are prepared by reduction of a quinazolinonium of formula (wherein X is the anisnic moiety of an inorganic acid) which has been prepared by cyclization of-a compound of formula with HX.
Patent GB-1226633-A (GB)
IPC: D01F2/10
Filed: 1968-11-11
Abstract: 1,226,633. Colouring compositions. CIBA Ltd. 11 Nov., 1968 [10 Nov., 1967; 20 Sept., 1968], No. 53242/68. Heading C4A. [Also in Division C3] A composition for colouring viscose comprises (a) an organic sulphonamido pigment free from complex-forming metals and containing at least one group -SO 2 NHR- (R=H or aryl) dissolved in (b) a water-soluble emulsifier. Emulsifier (b) may contain up to 50% water, by weight. Optionally (c) an organic polar solvent for the pigment is included, which is watermiscible in all proportions and inert towards viscose; (b) and (c) may be the same compound. Suitable pigments (a) are those of the azo, anthraquinone and indigo series; particularly azo pigments containing the group R-NH-O 2 S-F, where F is an azo residue. Numerous nonionic and cationic emulsifiers are specified for component (b). Numerous solvents (c) are mentioned, having boiling points above 100 C. Reference has been directed by the Comptroller to Specification 1,128,158.
Patent GB-1404579-A (GB)
Title: Consumers electricity control units
IPC: H02B1/46
Filed: 1971-11-17
Abstract: 1404579 Switchboards J A CRABTREE & CO Ltd 21 Aug 1972 [17 Nov 1971] 53332/71 Heading H1N A consumer's control unit has circuitbreakers which may be connected to or disconnected from a bus-bar 7 by guided movement towards or away from the bottom of the casing of the unit, the bus-bar being a flat plate mounted at right angles to the bottom of the casing in an insulating frame 3 having guide channels formed between ribs 6a, said channels lying in a plane parallel to the plane of the bus-bar and co-operating with projections 30 on the circuit-breakers, indicated at 31. The frame 3 is L-shaped having a flat base 4, and a limb 6 at right angles to the base 4 which is mounted on threaded bosses 1, 2 in the moulded casing A. A switch housing 5 at one end of the base 4 encloses an operating cam 20 which actuates contact plates 8 through rods 19, the plates 8 pivoting about housing projections 9a in contact with an end of the bus-bar 7 and a neutral terminal plate 15, and co-operating with fixed contacts 13.
Patent GB-1195275-A (GB)
Title: Core Shaft for a Web Handling Machine
Inventor: TESKE ERNEST HAROLD
IPC: B65H16/06
Filed: 1967-08-18
Abstract: 1,195,275. Feeding webs. FMC CORP. 18 Aug., 1967 [1 Sept., 1966], No. 53404/68. Divided out of 1,195,274. Heading B8R. [Also in Division F2] The subject-matter of this Specification is identical with that described in Specification 1,195,274, but the claims are concerned with the core shaft comprising a central cylindrical portion tapered at both ends, with means on at least one of the ends for establishing a driving connection with a power source.
Patent GB-1224326-A (GB)
Title: Improvements in or relating to coil winding apparatus
Inventor: COMER ALEC WILLIAM
IPC: H01F41/06
Filed: 1968-11-12
Abstract: 1,224,326. Making electrical windings. AVO Ltd. 11 Nov., 1969 [12 Nov., 1968], No. 53557/68. Heading B3A. In coil winding apparatus, which includes at least one coil forming die M1, M2 of electrically conductive material and means for supplying electric current to a coil L1 of insulated wire on, or in, the die to heat and thus soften a thermoplastic coating on the wire, means are provided for automatically disconnecting the current supply if the wire comes into electrical contact with the die. If a short circuit occurs between the coil L1 and either of the dies Ml, M2, current will flow from a D.C. source through the energizing coil of a relay RL1 causing the relay to operate and open a contact 1/1. As a result, a bonding contactor BC will be de-energized to open contacts C1, C2, thereby disconnecting a transformer T1 from the mains supply. At the same time contacts 1/2 will close to hold the relay RL1 operated. A resistor R1 limits the current flow under short circuit conditions, such current coming from the D.C. source. To reduce overloading on the relay coil before the relay operates when a short circuit occurs in the region X of the dies M1, M2, the relay coil may be connected to a centre tap on the secondary winding instead of to one end of the winding, Fig. 2 (not shown). The short circuit current may be still further reduced by the inclusion of resistors (R3), (R4) between the centre tap and the contact 1/2. A normally closed contact (1/4) may be included on the relay to stop the winding motor as soon as a breakdown of insulation occurs.
Patent GB-1402152-A (GB)
Title: Electrical steel sheet provided with a coating derived from a varnish
IPC: C09J105/00
Filed: 1972-11-21
Abstract: 1402152 Resin coating compositions for steel sheets ALLMANNA SVENSKA ELEKTRISKA AB 21 Nov 1972 [22 Nov 1971] 53665/72 Heading C3R An electrical steel sheet is provided with a coating derived from a varnish which comprises a binder and a solvent, the binder comprising mainly a mixture or a partially reacted mixture of a resinous product containing methylol groups and a carbohydrate consisting mainly of one with up to 12 carbon atoms in the carbon chain. Suitable resins are phenolic, melamine and urea resins and mixtures thereof which may be modified with alkyds or acrylates. Suitable carbohydrates include monosaccharides and disaccharides and acid hydrolysis products of polysaccharides such as starch and cellulose, disaccharides and industrial waste products such as molasses and sulphite cellulose waste liquor. The varnish preferably contains 30- 70% wt. of the resin based on the total weight of the resin and carbohydrate. Optionally ingredients include another organic binder, e.g. the lignin derivatives in the sulphite cellulose waste liquor; a finely divided inorganic and/or organic filler such as mica powder, clay or an organic polymer such as polyethylene, polypropylene and polyvinyl chloride; wetting agents. In the manufacture of the varnish an aqueous solution of the carbohydrate after adjustment of its pH value to at least 7 may be mixed with a solution of the resin in an organic solvent which is miscible with water, e.g. acetone, ethanol or a glycol. Phosphate groups are preferably added to the varnish by using H 3 PO 4  for the hydrolysis of the carbohydrate or by using a phosphate when adjusting the pH of the varnish. In the examples varnishes are prepared by hydrolysing an aqueous solution of saccharose, molasses, sulphite cellulose waste liquor or starch with phosphoric acid and then adjusting the pH to 8 with ammonia, or by neutralizing an aqueous solution of dried sulphite cellulose waste liquor or saccharose with trisodium phosphate, and mixing the aqueous carbohydrate solution obtained with a solution of a phenolic or melamine resin in an organic solvent, and adding a wetting agent. The varnishes are applied to electrical steel sheets and cured.
Patent GB-1135950-A (GB)
Title: Improvements in or relating to devices constituting multiple-speed or infinitely variable-speed reversible motors
IPC: F03C1/32
Filed: 1965-12-20
Abstract: 1,135,950. Hydraulic reciprocating motors; compressed air engines. HYDRAULICA. Dec.20, 1965 [Feb. 6, 1965], No.53818/65. Headings F1A and F1S. A swash-plate-type hydraulic or pneumatic motor comprises a rotating cylinder block 6 with spring-loaded pistons 7 engaging a swash-plate 9 mounted on a member 10, which is rotatable about an axis 11 differing from the swash-plate axis 13 and drive-shaft axis 12, so as to vary the inclination of the swash-plate. The axis 11 intersects swash-plate axis 13 substantially in the plane containing the points of contact of the pistons with the swash-plate. The member 10 functions as a rotary piston and has a peripheral groove 15 defining a working chamber. A vane 20 moves with member 10 and a vane 21 is fixed to the casing. Pressure liquid is supplied to the working chamber to move member 10 in either direction to give either a number of set speeds or continuously variable speed. The swash-plate control valves may be manually or automatically controlled, e. g. responsive to the motor load. The motor valve plate may be linked to the swash-plate so as to be adjusted at the same time, Fig. 7 (not shown). A detent means 33 operates to resiliently hold the member 10 in its maximum and minimum speed positions, and also holds control valve 76a in its end positions. Adjustable overload valves 40 act to connect the motor cylinders to the motor casing 2, which has a discharge orifice 42. The speed control systems are described in detail.