baber/WOPTO huggingface dataset:
Patent GB-479668-A (GB)
Title: Improvements in or relating to telephone or like transmission systems
IPC: H04B3/10
Filed: 1937-07-30
Abstract: 479,668. Automatic volume control. STANDARD TELEPHONES & CABLES, Ltd. July 30, 1937, No. 21189. Convention date, Sept. 16, 1936. [Class 40 (iv)] A volume - controlling device which comprises series and shunt resistances in the input circuit of an amplifier and which is controlled,by means of a pilot current taken from the output of the amplifier . includes temperature-sensitive resistance elements controlled in such a way that the series and shunt resistances are varied while maintaining their product constant. The temperature-sensitive elements 14, 15, which may be of silver sulphide or boron, are each associated with a similar resistance element 16, 17 and are enclosed therewith in ovens 20, 21, the heating of which is controlled respectively by relays 13, 25. The elements 16, 17 form opposite arms of a Vrheatstone bridge having constant resistances 22, 23 in the other two arms, the two diagonals being connected respectively to an A.C. source and through a rectifier 24 to relay 25. The pilot current passes through a filter 11 and rectifier 12 to relay 13. As long as the bridge is balanced, the product of the resistances 16, 17 is constant, and hence the product of the resistances 14, 15, which are subject to the same heat conditions, is also constant. If the pilot current is too small, relay 13 is inoperative and the oven 20 heats until the resistance 14 decreases sufficiently for the pilot current to operate relay 13. The corrcsponding decrease in the resistance 6 unbalances the bridge and operates relay 25, thus allowing the oven 21 to cool and the resistances 15, 17 to increase until the balance is restored.
Patent GB-302562-A (GB)
Title: Improvements in or relating to heat exchangers
IPC: F28F7/02
Filed: 1928-07-21
Abstract: 302,562. Kochs & Co., Ltd., W. E., (F÷ge, H.). July 21, 1928. Plate apparatus.-A heating &c. unit comprises a series of elements b of annular cellular formation, the parts being connected by hollow ribs c. Heat transmitting fins d may be provided. The ribs may rise toward the centre to facilitate disengagement of gases. Admission of medium to the elements is effected through a central conduit e at each end of which in each element is a ring f, g which are clamped to form a tight joint by rods h and nuts k to unite adjacent elements.
Patent GB-1142025-A (GB)
Title: Push-pull amplifiers
IPC: H03F1/34
Filed: 1966-05-12
Abstract: 1,142,025. Transistor amplifiers. RADIO CORPORATION OF AMERICA. 12 May, 1966 [14 May, 1965], No. 21222/66. Heading H3T. In an amplifier having a pair of push-pull driven transistors 38, 40 providing a push-pull output to a load, e.g. loud-speaker 66, and having negative feed-back provided between the output and the input, a capacitor 70 is connected directly between the control electrodes of the transistors so as to stabilize the amplifier against self oscillation. The value of the capacitor 70 is such that the gain of the amplifier is substantially unaffected over the audio range but decreases the gain of the output transistors 38, 40 at high frequencies. This enables any instability caused by the negative feed-back path 68, which is connected to determine the gain and frequency response of the amplifier, to be controlled. The transformer windings 60, 62 are arranged to apply signals of 180 degrees out of phase to the base electrodes of the output transistors 38, 40 so as to drive them in a push-pull manner. The output stage is driven by an input stage comprising transistors 14 and 24 which have D.C. feed-back provided via a resistor 36 so as to stabilize their working point against changes in temperature.
Patent GB-501585-A (GB)
Title: Improvements relating to the utilisation of whey and other dairy residual products
IPC: C12P7/28
Filed: 1937-07-30
Abstract: 501,585. Butyl alcohol and acetone. HELLINGER, E. July 30, 1937, No. 21228. [Class 14 (ii)] Whey and other dairy residual products, containing lactose and protein, with, if desired, additional sugar such as molasses, is neutralized, sterilized and fermented to produce acetone and butyl alcohol by Clostridium acetobutylicum (Weizmann) with, if desired, Clostridium butyricum (Prazmowski).
Patent GB-1162745-A (GB)
Title: Pulse Circuit
IPC: H03K17/73
Filed: 1967-05-09
Abstract: 1,162,745. Typewriters etc.; selective printing. INTERNATIONAL BUSINESS MACHINES CORP. 9 May, 1967 [3 June, 1966], No. 21388/67. Heading B6F. [Also in Division H3] A thyristor circuit (see Division H3) is used to operate a print hammer winding 2. When thyristor 1 is fired to operate the hammer, a commutating capacitor 7 switches off a thyristor 4 and through a diode 12 rapidly charges a capacitor 13 with its upper plate negative. The commutating capacitor rapidly charges through a transistor 5 which is now conducting and capacitor 13 begins to charge in a positive direction through resistor 14. This continues until the capacitor voltage fires thyristor 4 and so through the action of the commutating capacitor switches off 1 and de-energizes the print hammer. If the timing components 10-14 are omitted the circuit is bi-stable.
Patent GB-1101536-A (GB)
Title: Improvements in a combined hammer and mallet
Inventor: WRIGHT RICHARD ARTHUR
IPC: B25D1/02
Filed: 1964-05-25
Abstract: 1,101,536. Hammers and mallets. PARLATEX Ltd. 18 May, 1965 [25 May, 1964], No. 21441/64. Heading B4C. A combined hammer and mallet comprises a metal portion 1 secured to a portion 3 of softer material e.g. hard rubber or plastics material. In a modification, instead of the larger portion of the head being made from the softer material as shown, the latter material is used only as an end cap on the metal head.
Patent GB-476769-A (GB)
Title: Improvements in or relating to couplings for railway vehicles
IPC: B61G5/06
Filed: 1936-08-04
Abstract: 476,769. Automatic couplings for vehicles. SCHARFENBERGKUPPLUNG AKT.-GES., and SCHARFENBERG, K. Aug. 4, 1936, No. 21442. [Class 103 (v)] In a railway vehicle coupling of the kind in which a drop-hook 2 pivoted about an horizontal pin 2a is locked in engagement with a surface on the opposed couplerhead by means of a bolt or wedge 3, the bolt carried by one head engages between a part of the opposite head and the drop-hook carried thereby so as to lock the latter. Preferably the locking is effected during the act of swinging into engagement carriers 4 for the contacts of electric circuits, these carriers being pivoted about vertical pins 3a and being operated by toggle mechanisms 6a, 6<1>b and 6<11>b asso. ciated with compressed-air actuated piston 5a. The bolt 3 is formed integrally with an arm 3b, which is also pivoted at 3a and has an extension 3c engaging an actuating lug 3d on the carrier 4. When the contact carriers 4 and coupling elements 2, 3 are in their operative position, the toggles 6a, 6<1>b and 4<4>b have passed their dead centres, and no uncoupling can occur by the carriers 4 swinging away from each other. Automatically actuated covers 9 pivoted at 9a are provided to mask the cable contacts in their uncoupled positions. Specification 452,244 is referred to.
Patent GB-632743-A (GB)
Title: Improvements in holders for electric discharge lamps
IPC: H01R33/02
Filed: 1947-08-06
Abstract: 632,743. Lamp-holders. SYLVANIA ELECTRIC PRODUCTS, Inc. Aug. 6, 1947, No. 21458. Convention date, Feb. 28, 1946. [Class 38 (i)] A holder for a double-ended fluorescent lamp comprises a tubular insulating body 2, Fig. 2, having an inturned flange 14 at one end against which an insulating wafer 9 housing a contact button 10 abuts. The wafer has an aperture 31 for a pin on one end of the lamp. A spring 11 fixed at one end to a base member 13 contacts the button 10, said base member being secured in the body, with the spring slightly compressed, by a grub-screw 15. An end member 3 is secured to the body by a screw 5 which also secures the holder to a mounting bracket 4, electrical connections to the spring 11 being effected by a lead secured to a rivet 12 at the inner end thereof. Holders as above may be provided at both ends of the lamp, or alternatively one of these may be replaced by a holder, as shown in Fig. 3, wherein the spring contact 10, 11 and base 13 are replaced by fixed contacts 33, an insulating disc 26 provided with a hole 27 being mounted in front thereof.
Patent GB-763046-A (GB)
Title: Improvements in or relating to machines for knocking out foundry moulding boxes
IPC: B22D29/02
Filed: 1952-08-26
Abstract: 763,046. Moulding-machines. FOUNDRY EQUIPMENT, Ltd., and BEECH, A. S. Nov. 18, 1953 [Aug. 26, 1952; Sept. 29, 1952], No. 21476/52. Class 83 (1). Apparatus for knocking out moulding-boxes comprises a massive base, a relatively lightweight vibrating frame which includes a grille, mounted on the base, resilient connections between the frame and base, rotary out-of-balance vibrators spaced apart longitudinally of the frame and located at the front and rear ends thereof, and upstanding rails on the grille close enough together to support the undersides of moulding boxes. A cast-iron frame 11, Figs. 1, 2, is mounted on rubber blocks 13 and supports on rubber rings 19 a grille 21, 22, which is vibrated by out-of-balance weights vibrated by motors 31, 34. The inner faces of the walls of the frame slope inwardly to an opening 12 in the bottom. Frames may be placed side-by-side to support large moulding-boxes. In a modification, Figs. 5 and 6, base-members 40, 41 support on rubber mountings 43, a steel trough 45 which is vibrated by vibrators 46 at each end so that the contents of the trough are shaken and also caused to travel longitudinally of the trough. The trough has two floors 47, 48, the lower a screen of small mesh and the upper a grille with large openings. Mould-boxes are carried on rails 49, 50 and guided by rails 54. The apparatus also serves as a sand cooler, the vibrations facilitating dissipation of heat and escape of steam from the sand in the bottom of the trough. The trough may be given a slight fall to speed the movement of the contents. Reference has been directed by the Comptroller to Specification 664,598.
Patent GB-1509571-A (GB)
Title: Liquid crystal display system
IPC: G09G3/18
Filed: 1975-05-20
Abstract: 1509571 Liquid crystal compositions XEROX CORP 20 May 1975 [25 Sept 1974] 21523/75 Heading C4X [Also in Divisions G2 and G5] A liquid crystal composition comprises p-[N-(pbutoxybenzylidene)amino]phenylacetate; p-anisalamino-phenylacetate; p-anisalaminovalerophenone; N-(p-ethoxy-benzylidene)-p-butylaniline; N-(p-butoxybenzylidene)-p-butylaniline and N- (p-methoxybenzylidene)-p-butylaniline with one or more of cholesteryl chloride, erucate or geranyl carbonate or 2-(2-ethoxy)ethyl carbonate. The composition is used in a display system (see Divisions G4-G6).
Patent GB-1167296-A (GB)
Title: Improvements in Disposable Containers for Liquid Gas
IPC: G01F11/02
Filed: 1968-05-07
Abstract: 1,167,296. Liquefied gas storage containers. APPLICATION DES GAZ. 7 May, 1968 [12 May, 1967], No. 21540/68. Heading F4P. The concave base of a disposable pressurized liquefied gas, e.g. butane, storage cylinder comprises a thin inner plate 2, Fig. 3, having its edge 3 rolled over the rim of the cylinder wall and an outer reinforcing plate 4 lying against the inner plate 2 and having its edge 5 rolled over the rolled joint formed by the edge of the inner base-plate 2. In a modification the outer plate 4, Fig. 4, is annular and in the event of an undue pressure rise the inner plate is bulged outwardly to the position 2a and thereby indicates the pressure rise. In a further modification the central position of the reinforcing plate is made thinner than the remaining position and is bulged outwardly with the central position of the inner plate in the event of an undue pressure rise with the cylinder.
Patent GB-990946-A (GB)
Title: Fused cast refractory
IPC: C04B35/107
Filed: 1963-05-29
Abstract: A fused cast refractory contains at least 92% of fluorine, silica and alumina, the fluorine constituting 0.05 to 2%, and the silica 1.5 to 25%.  Iron oxides and titania should not exceed 0.2% in total. Specification 265,847 is referred to.
Patent GB-216153-A (GB)
Abstract: 216,153. Boudy, C. M. May 19, 1923, [Convention date]. Composition fuel. - A firelighter is composed of 60 to 65 per cent by weight of resin, 5 to 10 per cent by weight of liquid hydrocarbons such as patrol, mazout, &c., and 25 to 35 per cent by weight of fibrous or ligneous materials such as shavings, sawdust, &c. The resin is melted and made into a paste with the fibrous materials which have been impregnated with the liquid hydrocarbons, and then either moulded directly or else allowed to cool and then pulverized, sifted, and reagglomerated by pressure. In the form shown the lighter has the form of a disc with a cylindrical wall a and a lower surface formed with air-feeding channels or grooves c opening into a central cavity d which acts as a collector and from which rises a central chimney b of a diameter about a quarter of that of the disc.
Patent GB-1321354-A (GB)
Title: High frequency power transistor
IPC: H01L29/73
Filed: 1971-04-19
Abstract: 1321354 Semi-conductor devices RCA CORPORATION 19 April 1971 [20 Feb 1970] 21620/71 Heading H1K A high frequency, high power transistor comprises a collector region 20 including a hub portion 22 extending to a central portion of the surface 14 of a semi-conductor body, an annular base region 24 situated in the body surrounding the hub portion and extending to the surface, the base region including a plurality of radial lobes 26-29 containing surface adjacent heavily doped regions 25, and an emitter region 30 including a plurality of wedges 34, 35 extending interdigitatedly with the base lobes, contact being made to the base, emitter and collector regions. In the embodiment shown the emitter region includes a ring portion 32 surrounding the base lobes and contiguous with the wedges. Each base lobe includes the shallow, heavily doped region 25, of the same conductivity type as the base, to improve contact resistance and reduce base spreading resistance. The body may be of silicon with boron and phosphorus dopants, the collector region 20 may be epitaxially deposited on a more heavily doped substrate 18. The electrode may be of aluminium or tungsten. In an alternative embodiment, the emitter region comprises the wedges only, the emitter electrode including "tabs" which extend over, and make contact to, the wedges.
Patent GB-681944-A (GB)
Title: Process for the stabilisation of halogen-containing macromolecular compounds, substances thus stabilised and articles containing such substances
IPC: C08K5/21
Filed: 1950-09-01
Abstract: Halogen-containing polymers are stabilized by incorporating therein minor proportions of a basic-acting substance, an aryl urea containing at least one phenyl group carrying at least one non-hydrocarbon substituent, and an anti-oxidant.  The polymers may be polyvinyl chloride, chlorinated polyvinyl chloride and polyvinylidene chloride, and copolymers of vinyl and vinylidene chloride, with, if desired, other monomers.  Basic substances mentioned are carbonates, bicarbonates and hydroxides of alkali and alkaline earth metals and magnesium, magnesium oxide, basic phosphates, alkali metal salts of weak organic acids and amines. Specified antioxidants are p-octylphenol, menthyl phenol, 2 : 6-di-t.-butyl-4-methyl phenol, hydroquinone, the mono-benzyl ether of hydroquinone, diphenylamine and N-phenyl-betanaphthylamine.  Aryl ureas mentioned are 2 - chlorophenyl, 4 - chlorophenyl, N,N1 - di - (4 - chlorophenyl), 4 - carbethoxyphenyl, 2 - ethoxyphenyl and 4-ethoxyphenyl urea.ALSO:Addition to 667,041 Halogenated rubber is stabilized by incorporating therein minor proportions of a basic acting substance, an aryl urea containing at least one phenyl group carrying at least one non-hydrocarbon substituent, and an anti-oxidant.  Basic substances mentioned are carbonates, bicarbonates and hydroxides of alkali and alkaline earth metals and magnesium, magnesium oxide, basic phosphates, alkali metal salts of weak organic acids, and amines.  The antioxidant may be P-octylphenol, menthyl phenol, 2 : 6-di-t-butyl-4-methyl phenol, hydroquinone, the mono-benzyl ether of hydroquinone, diphenyl amine, or N-phenyl-beta-naphthylamine.  Specified ureas are 2-chlorophenyl, 4-chlorophenyl, N,N1-di(4-chlorophenyl), 4-carbethoxyphenyl, 2-ethoxyphenyl and 4-ethoxyphenyl urea.
Patent GB-531529-A (GB)
Title: A process for dissolving isinglass for the production of finings for beer
IPC: C12H1/052
Filed: 1939-07-25
Abstract: 531,529. Finings for beer &c. ENZYMIC MALT CO., Ltd. July 25, 1939, No. 21652. Convention date, Aug. 6, 1938. [Class 14 (ii)'] In preparing finings, isinglass is dissolved in malt wort which has ben acidified by the action of lactic acid bacteria, or in an extract of malt soured with lactic acid as described in Specification 339,047, [Class 14 (ii)].
Patent GB-222466-A (GB)
Title: A wind screen shield for the rear seat of vehicle bodies of the "torpedo" and like types
IPC: B60J1/00
Filed: 1924-09-13
Abstract: 222,466. Soc. Anon. Carrosserie Kelsch. Sept. 27, 1923, [Convention date]. Wind-screens. -A wind-screen, particularly adapted for vehicles with torpedo bodies, is mounted on the rear part of a shield, which covers a portion of the rear seating-space and protects the lower limbs of t'he occupants. In the arrangement shown in Figs. 1 and 2, the protective shield consists of two portions 3, 3 connected by a central longitudinal hinge 4, each portion carrying a section 5, 6 of the wind-screen. Access to the seating-space is obtained by pivoting upwards one or other portion of the shield, one section 5 of the wind-screen being arranged in advance of the other section 6 to permit such movement. The screen may be completed by side panels 8, 9 and a small central panel 7 which covers the gap between t'he sections 5, 6. A strut 10 may be provided to support the weight of the screen and shield. In a modification, Fig. 4, the portions 3, 3 of the shield are hinged at 11 to a longitudinally extending bar 12 fixed to the rear of the driver's seat', and the sections 14, 15 of the windscreen are pivoted to a standard 13 mounted on the bar 12.
Patent GB-318170-A (GB)
IPC: B31B1/74
Filed: 1929-07-16
Abstract: 318,170. Hesser Maschinenfabrik Akt.-Ges., F. Aug. 29, 1923, [Convention date]. Paper bags, making.-An ejecting device for the folding mandrels of paper bag making machines comprises one or more smooth rods having their front ends flush with the front face of the mandrel and serving directly for stripping the finished bag off the mandrel. Within a mandrel 1 in guides 8 slides a. tube 5 having its outer end closed by a disc 12 flush with the face of the mandrel and its inner end mounted on a block 6 provided with a projection 6b which is moved outwards to eject a bag from the mandrel on to a. tray 19. A pair of flat rails or vertically arranged bars may replace the tube 5.
Patent GB-1459628-A (GB)
Title: Channel induction furnaces
IPC: H05B6/20
Filed: 1974-05-16
Abstract: 1459628 Channel induction furnace INST PROBLEM LITIA AKADEMII NAUK UKRAIN SSR 16 May 1974 21850/74 Heading H5H [Also in Division F4] In a channel induction furnace comprising a crucible 1 connected to the ends of a channel 14 which in use contains molten metal which forms the secondary of closed magnetic circuit 18 carrying a primary winding 17, the crucible 1 is divided into at least three communicating chambers by vertical partitions 2, 3, the centre chamber 5 being provided near the top with a pouring spout 7 from which metal is discharged to a mould by energization of polepiece windings 22, 23, of an open magnetic circuit 19 between which the portion of the communicating channel 9 lying beneath the centre chamber 5 is disposed. Metal is thereby pumped electrodynamically from the side chambers 4, 5 via the communicating channel 9 to the centre chamber. The windings 22, 23 are separately energized and may be separately controlled. The central chamber may be further subdivided to form several middle chambers each with a seprate open electromagnetic circuit to enable several moulds to be fed simultaneously from a single furnace. The communicating channel 9 is detachable to facilitate replacement. The induction heating channel 14 is detachable and may be mounted on the side of the crucible, in which case the electromagnetic pump is mounted to embrace the communicating channel 9 mounted at the bottom of the crucible. In Figs. 7 and 8, not shown, the central chamber is subdivided by two further partitions and only the intermediate subdivision of the central chamber has a pouring spout. Each subdivision of the central chamber has its own electromagnetic pump and the upper partition walls of the outer subdivisions of the central chamber communicate with the side chambers so that metal is circulated through or over the upper partition walls to the side chambers.
Patent GB-263445-A (GB)
Title: Improvements in apparatus for creating a vacuum
IPC: F04F5/20
Filed: 1925-06-17
Abstract: 263,445. Percival, S., (Ken-Crip Corporation). June 17, 1925. Aspirating-apparatus; regulating or controlling action.-A chamber 1 which is being exhausted by a pump contains a tube 4 having a small inlet 3 from the atmosphere, so that there is a vacuum produced in the tube 4 of a lesser order than in the main chamber. If a valve 2<a> is raised, air is drawn in through inlets 6 and increases the pressure in the chamber; at the same time, the entering air has an entraining action on the tube 4 and maintains the vacuum in the said tube.
Patent GB-169149-A (GB)
Title: Improvements in and relating to safety systems for electric networks
IPC: H02H7/26
Filed: 1921-08-17
Abstract: 169,149. Naamlooze Vennootschap Lijn-Protectie, Maatschappij tot Exploitatie van Electrotechnische en andere Octrooien. Sept. 16, 1920, [Convention date]. Drawings to Specification. Protective arrangements for parallel conductor systems of the kind in which auxiliary voltages are applied to the branches so as to generate small differences of potential between the branches and the section, have the transformers for generating the auxiliary voltage so proportioned and connected that the ratio of the currents in the parallel conductors remains the same for all loads. A transformer core is arranged at each end of a parallel feeder section and is magnetized in opposite directions by the two parallel feeders, the ratio of transformations of one transformer being greater and that of the other smaller than the ratio of the impedances of the two feeders. The transformers are magnetically saturated at a relatively low current.