baber/WOPTO huggingface dataset:
Patent GB-642344-A (GB)
Title: Improvements in or relating to radio receiving apparatus
IPC: H04B1/26
Filed: 1948-02-27
Abstract: 642,344. Frequency measuring. DEPARTMENT OF COMMERCE, DIRECTOR OF THE OFFICE OF TECHNICAL SERVICES OF. Feb. 27, 1948, No. 5971. Convention date, Nov. 27, 1945. [Class 37] [Also in Group XL (c)] A radio receiver comprises a plurality of oscillator and amplifier sections so connected that one part of the output of each amplifier is directly amplified, and the remainder of the output is amplified after frequency conversion, by the next amplifier, each amplifier having a band width one half the width of its predecessor. The arrangement enables a narrow band amplifier to be used in a receiver which is responsive, without variation of tuning, to all signals in a wide frequency band. Fig. 1 shows part of a radio receiver in which all incoming signals in the frequency band of, for example, 100 mc/s. to 120 mc/s are mixed in frequency converter 11, with signals at 110 mc/s. from oscillator 12. The first amplifier 13 passes frequencies 'between 1 mc. and 10 mc/s. and therefor amplifies all beat frequencies corresponding to signals between 100 and 120 mc/s. except for a null between 109 and 111 mc/s. The output from the first amplifier is applied to a second amplifier 16 which passes frequencies between 6 mc/s. and 10 mc/s. The portion of the output from amplifier 13 between 6 and 10 mc/s, is amplified directly by amplifier 16, while that between 1 and 5 mc/s. is first converted by mixing with oscillations at 11 mc/s. from oscillator 15. The frequency of an incoming signal may be determined by varying the frequency of oscillator 12 until the signal disappears due to the presence of the null which exists around the particular frequency of the oscillator.
Patent GB-395076-A (GB)
Title: Improvements in sound amplifiers for talking machines
IPC: G10K13/00
Filed: 1932-02-29
Abstract: 395,076. Sound-magnifying appliances. CHALMERS, J., 233, Dalkeith Road, Edinburgh. Feb. 29, 1932, No. 5973. [Class 13.] A sound amplifier comprises two spaced circularly corrugated discs 1, 2 provided with truly cylindrical and equi-spaced tubes 4 attached to the interior crests of the corrugations, those from disc 1 interpenetrating those from disc 2 terminating in the plane of the crests on the interior face of the opposed discs and forming a zigzag annular path for the sounds proceeding from a tube 3 passing centrally through the disc 1. A flare 5 is provided diverging from the periphery of disc 1.
Patent GB-563412-A (GB)
Title: Improvements in or relating to game apparatus
IPC: A63F9/16
Filed: 1943-04-15
Abstract: 563,412. Game apparatus. COLEMAN, Ltd., C., and COLEMAN, R. S. April 15, 1943, No. 6033. [Class 132 (ii)] Apparatus for playing a game with a spinning top comprises a box containing a raised platform c with a central opening d cut or serrated at the edge to provide a number of openings e any one of which may receive the spindle k of a top spun within the central opening and upon the floor i of the box. The base of the box may be flat, concave, convex or of other curved shape. The openings e are numbered 'for scoring purposes. The spindle k may be detachable from the disc j of the top and may consist of a stick of wood of square cross-section.
Patent GB-125214-A (GB)
Title: Improvements in or relating to Line-measuring Mechanism for Typographic Composing Machines.
IPC: B41B25/00
Filed: 1918-04-09
Abstract: 125,214. Booth, J. B. S., and Lanston Monotype Corporation. April 9, 1918. Strip-perforating machines.-In machines, such as are described in Specification 17199/08, in which the line-measuring mechanism comprises a units-rack and a units-wheel, the retaining-pawl of the units-wheel is controlled by a lever-device of the following character; the device may be connected to a spring or a pneumatic motor which is arranged to buffer the pawl on withdrawal and to return the pawl. As shown, the retaining-pawl c is withdrawn by a lever F provided with a projection F<3> engaging a surface C on the tail C<2> of the pawl. The lever F is connected by a link G to the lever e which supports the carrier b' of the units-rack b and is actuated in the manner described in the above-mentioned Specification. A lever H pivoted at H' to the lever F is provided with a projection H<2>, engaging a surface C<1> on the tail c<2>, and is connected to a rod J on the piston J' of a pneumatic motor J<2>. In operation, the lever e, on pivoting about the projection e<4> pulls down the lever F, and the pawl is withdrawn, the movement being buffered by the motor J<2> and chattering being prevented by the engagement of the tail c<2> with the projections. On release of the key, the piston J<1> is forced upwards and the levers F, H are raised, the projection F<3> being moved away from the surface C and the projection H<2> moving along the surface C' and causing the pawl to be returned. The fulcrum of the lever e then changes from the point F' to the point e<4> and the units-rack is withdrawn. At the end of a line, the retaining- pawl is withdrawn by the usual reversing-lever k, which is arranged to engage the tail of the lever H.
Patent GB-895378-A (GB)
Title: Process for producing and stabilising formaldehyde polymers from trioxane
IPC: C08G2/00
Filed: 1961-02-20
Abstract: Anhydrous trioxane is polymerized using oxalic acid as catalyst to produce E-polyoxymethylene.  The concentration of oxalic acid is preferably from 0,05 to 1% of the mixture.  The hydroxyl groups of the polyoxymethylene produced may by alkylated or acylated. Acylation may be carried out using the lactone of isocrotonic acid or with acetic anhydride.
Patent GB-671160-A (GB)
Title: Improvements in or relating to mechano-electric transducers
IPC: G01L1/20
Filed: 1950-03-13
Abstract: 671,160. Microphones; gramophone pickups. WILDHACK, W. A. March 13, 1950 [March 14, 1949], No. 6245/50. Class 40 (iv). [Also in Groups XXXV and XXXVIII] Movements of the diaphram 156 of a microphone, Fig. 14, vary the electrical resistance between points 40, 42 of a spiral tension spring T made of non-uniform stiffness along its length so that certain convolutions will separate (or close) under smaller axial forces than are required to separate (or close) other convolutions. Two such springs T may be axially deflected by the pivoted stylus 166, Fig. 15, of a phonograph pick-up, the electrical variations of one or both springs being used for the output.
Patent GB-1347458-A (GB)
Title: Colour killer system for colour television receiver
IPC: H04N9/70
Filed: 1972-02-10
Abstract: 1347458 Colour television receiver GENERAL CORP 10 Feb 1972 [13 Feb 1971] 6251/72 Heading H4F In a PAL system colour television receiver of the type described in Specification 1,340,896, in which demodulation is effected by means of an offset subcarrier of frequency phase modulated with a sawtooth wave at the horizontal scanning frequency f H , the offset subcarrier is also used to derive a colour killer signal by phase detection of the offset subcarrier and the swinging burst or by amplitude detection of the offset subcarrier.
Patent GB-323956-A (GB)
Title: Improvements in or relating to steerage mechanism of mechanically-drawn ploughs
IPC: A01B69/00
Filed: 1929-02-28
Abstract: 323,956. Fowler, C. H. Feb. 28, 1929. Balance ploughs; steering-gear.-In steering-mechanism for cable-drawn ploughs the land-wheels are fixed in position relative to the brackets supporting the steering-rods and relative movement between the plough frame and the running-wheel axle is taken up in intermediate parts of the steering-rods. The steering-rods are made in two slidably or telescopically connected parts 8, 9, the outer parts 8 carrying the hand-wheels 10 and being mounted in pivoted bearings 3 on the brackets.2 and held against longitudinal movement by collars 11, and the inner or intermediate parts 9 being connected to the steering-gear in a housing 6 above the axle 5. The telescoping parts may be of square or other non-circular section, or may be correspondingly splined.
Patent GB-600007-A (GB)
Title: Improvements in or relating to the manufacture of nuts
IPC: B21D53/24
Filed: 1944-04-06
Abstract: 600,007. Making nuts. ELASTIC STOP NUT CORPORATION OF AMERICA. April 6, 1944, No. 6482. Convention date, April 6, 1943. [Classes 83 (ii) and 83 (iv)] [Also in Group XXV] An anchor nut with a fibre locking insert 13, Fig. 4, is made from a sheet metal blank by a series of cupping, stamping and trimming operations and in one form of machine the blank is moved from station to station by a series of horizontally movable fingers from which it is transferred to the die by the punch and to which it is returned from the die by an ejector. Forging-dics and punches.-In the formation of the seat for the insert, the blank is received by spring-supported jaws 23, Fig. 5, caused to close in on the neck by the punch 21 forcing them down against cam surfaces. The punch has a centring pilot 22 that supports the part to be threaded against flow produced by the punch P that has a coned end 25 to form the bevel 19, a short cylindrical section 27 to form the lip, a shoulder 30 to form the top edge of the neck and recesses 29 to form the projections 17. The recesses are sufficiently numerous to prevent fracture of the punch by the flow of metal during forging.
Patent GB-610803-A (GB)
Title: Improvements in or relating to radio-controlled projectiles
IPC: F41G7/24
Filed: 1942-05-13
Abstract: 610,803. Automatic control systems for guiding projectiles. SPERRY GYROSCOPE CO., Inc. May 13, 1942, No. 6529. Convention date, July 8, 1941. [Class 38 (iv)] [Also in Group XL (c)] The directional radiator for guiding a projectile towards its target is controlled by a predictor system. As shown, the predictor 172 by means of selsyn transmission systems of known kind controls a gun 185 in altitude and azimuth and at the same time the radiator 171. Manual means 186, 187 allow the radiator to be moved independently of the gun when the projectile is near its target. The projectile is provided with aerials at spaced points and these in accordance with the energy that they receive, control valves causing blasts of compressed air or carbon dioxide to be emitted in the direction to keep the projectile to the beam. Alternatively, the projectile may be controlled by adjustable fins.
Patent GB-525840-A (GB)
Title: Improvements in electrical signalling systems
IPC: H02J13/00
Filed: 1939-03-01
Abstract: 525,840. Electric signalling system. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., and MACKENZIE, J. F. March 1, 1939, No. 6763. [Class 40 (i)] [Also in Group XXXVII] In a system in which signals comprising L.F. pulses of H.F. current are received by a resonant electro-mechanical relay which opens or closes a circuit when a predetermined amplitude of oscillation is attained, the relay is protected against operation by smaller number of high voltage pulses by a shunt comprising a dry plate rectifier which limits the input voltage. As described, the signals are transmitted over a power network by a transmitter of the type described in Specification 502,407 modified to supply H.F. current pulsating at different low frequencies. The receiver shown responds to particular L.F. pulses over phase 3 and neutral 4, incoming signals being selected as regards high frequency by loosely coupled series and parallel tuned circuits L1, L2 the output of which is rectified by a bridge MRA ... D or other arrangement of dry plate rectifiers and after limitation by rectifier VL is applied to the windings of two relays X, Y resonant to different low frequencies and controlling the circuits of a twoposition locking relay MLC to extinguish a light lamp L or to control water-heaters &c. The rectifier VL which operates merely as a limiter due to its non-linear resistance characteristic may comprise two dry-plate units connected back-to-back and may be combined with rectifiers MRA ... D in a single unit. Limitation may be effected before rectification and if the resonant relays have soft iron armatures, rectification is unnecessary. Limitation may be assisted by a small series resistance. Specification 518,877 is referred to as describing the use of a silicon carbide non-linear resistance material for voltage limitation.
Patent GB-476009-A (GB)
Title: Disengageable means in the driving mechanism of lathe saddles
IPC: B23Q5/52
Filed: 1937-03-08
Abstract: 476,009. Turning. CESKOSLOVENSKA ZBROJOVKA ACKIOVA SPOLECNOST, BRNO. March 8, 1937, No. 6835. Convention date, March 7, 1936. [Class 83 (iii)] [Also in Group XXIV] An automatic stop device for a lathe saddle comprises a friction clutch S and an adjustable device for regulating the maximum torque that can be transmitted before the clutch slips, the adjustable device co-operating with the disengageable part of the clutch and being rotatable to regulate the maximum torque to be transmitted, but not normally rotating with the clutch. The drive for the saddle R is obtained from the worm wheel 6, forming part of the cone clutch S, the disengageable clutch part 8, and a sleeve 10 and pinion 12, which engages a rack on the lathe bed. An extension spindle 7 of the clutch part 8 has a neck portion 20 at its free end engaged by a sleeve 25, screwthreaded in the saddle and having clutch teeth on its face adapted to engage similar teeth on a spring-pressed sleeve 29. This sleeve is keyed to a hand-adjusted knob 30 which is rotatable in the saddle but held axially by pins 33 engaging a groove in the periphery of the knob. The compression in the spring 32 is adjusted to a predetermined value by a plate 34 screw-threaded in the end of the knob 30, and when the clutch is engaged by rotating the knob, the clutch faces on the members 25 and 29 finally slip against the compression of the spring when the desired degree of maximum torque is transmitted.
Patent GB-686672-A (GB)
Title: A method for the production of new or improved films and adherent coatings comprising nitrocellulose in solution in a solid polymeric resinous material and compositions for their production
IPC: C08F251/02
Filed: 1949-03-14
Abstract: Films and adherent coatings are produced by forming, if necessary with the assistance of a volatile mutual solvent, a solution containing industrial nitrocellulose and a liquid polymerizable form of a dialkenyl ester of a dicarboxylic acid, said acid having in that portion of its molecule which is aliphatic one or more ethylenic carbon to carbon linkages, spreading out this solution into a film on a solid substrate and, after evaporating any volatile mutual solvent used, exposing the resulting film adhering to the substrate to polymerization conditions such as to favour oxidation.  The ester may be derived from itaconic acid, maleic acid, dihydromuconic acid, methylene malonic acid, crotonylidene malonic acid, benzylidene malonic acid or furfurylidene malonic acid.  The alkenyl groups of the ester may advantageously be allyl, but may also be methallyl. The solution may contain a cobalt drier, e.g. 0.1-1 per cent of cobalt naphthenate reckoned on the ester.  In an example a quarter-second viscosity industrial nitrocellulose containing 12 per cent nitrogen is dissolved in 4 times its weight of diallyl itaconate, with the addition of 0.5 per cent of cobalt naphthenate based on the weight of ester, and is brushed on to a steel or glass substrate in the form of a film.  The film is heated to 80 DEG  C. for 4-6 hours.  The resulting hard transparent colourless film adheres well to steel and to glass, but can be peeled off from glass after soaking in water for some time, whereby a self-supporting film may be obtained.  Other examples are given of the production of films by similar methods using diallyl maleate, diallyl dihydromuconate (see Group IV (b)), the diallyl ester of crotonylidene malonic acid (see Group IV (b)) and diallyl methylenemalonate.  Pigments, fillers, or plasticizers, more especially such as are unpolymerizable, ester solvents for nitrocellulose, e.g. dibutyl phthalate, and other effect materials may be included in the solutions.  Specification 686,671 is referred to.ALSO:Diallyl dihydromuconate is prepared by esterifying dihydromuconic acid with allyl alcohol in presence of paratoluene sulphonic acid as an esterification catalyst.  The diallyl ester of crotonylidene malonic acid is prepared by refluxing together crotonic aldehyde and diallyl malonate in presence of piperidine, washing with acidulated water, extracting with ether and fractionating the extract in vacuo after distilling off the ether. Both esters may be used in the manufacture of nitrocellulose lacquer solutions (see Group IV (a)).
Patent GB-229122-A (GB)
Title: Improvements in variable load supporting and shock absorbing devices
IPC: B60G15/06
Filed: 1924-03-18
Abstract: 229,122. Nygaard, O. O. March 18, 1924. Pneumatic and hydraulic springs.-A variable load-supporting and shock-absorbing device for motor vehicles consists of a number of pistons working in open-ended cylinders mounted in a trough containing fluid under pressure. The trough 16, which may form part of the axle, is provided with a number of open-ended cylinders. 18 in which slide pistons 23, 32. The end pistons 32 are connected to the chassis and the intermedia.te pistons 23 are of graduated length as shown and provided with spring-controlled heads 28 guided by pins 27 and slots 26, the heads having end resilient buffers 31. The pistons are guided in the cylinders by pins 24 and slots 25 the length of which determines the stroke of the pistons. The arrangement may be duplicated and the trough is connected to a tank containing the fluid and air under compression.
Patent GB-164484-A (GB)
Title: Improvements in or connected with internal combustion engines
IPC: F01P3/22
Filed: 1920-03-08
Abstract: 164,484. Bamford, J., and Bamford, C. J. March 8, 1920. Cylinders, cooling.-A hopper B with transverse air tubes C or a radiator is mounted above the water jacket of an engine cylinder and is cooled by forcing air through the tubes by a fan D mounted in an adjustable eccentric bearing 5.
Patent GB-667719-A (GB)
Title: Improvements in or relating to variable resistors and electric switches
IPC: H01C10/36
Filed: 1950-03-21
Abstract: 667,719. Switch contacts. WHITFIELD, E. H., and WELWYN LABORATORIES, Ltd. March 21, 1950. No. 6983/50. Class 38 (v). [Also in Groups XXIV and XXXVI] A radial switch arm is locked on to a switch spindle by providing it with a hole which fits on to the similarly shaped end of the shaft and is so arranged that when pushed on beyond its normal position and rotated through a right angle it becomes locked when the external axial thrust is removed, due to a thrust in the opposite direction exerted by either the spring pressure of the radial member or an addition spring. In the potentiometer shown the end of the operating spindle 3 is formed with a shoulder 5 over which fits a correspondingly shaped aperture 6 in the radial contact member shown in Fig. 3. The shaft 3 is also formed with a shoulder 7, Fig. 4, with which a corresponding slot 8 in the contact member engages when it is thrust in beyond its normal position and turned through a right angle. On releasing the thrust the springiness of the contact member maintains the slots 8 and shoulder 7 in engagement so that relative rotation between the contact member and the shaft is prevented. Alternatively, a further spring may be inserted between the contact member and the shaft for this purpose. The invention is also applicable to rotary switches, contactors, &c.
Patent GB-1208066-A (GB)
Title: Production of expanded plastics moldings from ethylene polymers or propylene polymers
IPC: C08J9/232
Filed: 1968-02-13
Abstract: 1,208,066. Expanded plastics moldings. BADISCHE ANILIN- & SODA-FABRIK A.G. 13 Feb., 1968 [14 Feb., 1967], No. 7029/68. Heading B5A. Expanded plastics moldings are produced by heating closed cell, particles of expanded preferably cross-linked ethylene or propylene polymers outside a mold by means of a flowing gas having a temperature above the crystallite melting point of the polymer, conveying the particles into the mold and fusing them together under pressure. Suitable polymers are homopolymers of ethylene and propylene, copolymers of these two monomers, and copolymers or ethylene with other olefines e.g. n-butene or with esters of acrylic or methacrylic acid or vinyl carboxylic esters. The particles used have a diameter of 3-40 mm. and a gel fraction of 10-85%. They may contain fillers, reinforcement materials, flame retardants &c., and may be coated with substances which aid fusing. The flowing gas has a velocity of 0À5-10 metres per second and a temperature which is 10-100‹ C. above the crystallite melting point of the polymer. The particles are compressed by 5-70% of their original bulk volume. The particles are fused together in a perforated closed mold which may be heated. For continuous production of moldings the mold may comprise 4 conveyer belts arranged to form a channel or in the case of sheet production 2 parallel conveyer belts are used with stationary or movable walls at the sides to form the channel.
Patent GB-1462334-A (GB)
Title: Method of altering the friability of abrasive particles
IPC: C01B31/06
Filed: 1975-02-19
Abstract: 1462334 Irradiating diamond or boron nitride DE BEERS INDUSTRIAL DIAMOND DIVISION Ltd 19 Feb 1975 [22 Feb 1974] 7029/75 Heading C1A [Also in Division C4] The friability of a plurality of diamond particles of the saw (SD including tool stone), metal bond (MD) or resin bond (RD) type or cubic boron nitride particles is decreased by subjecting the particles to irradiation capable of causing internal defects in the particles. The irradiation may be a flux of particles such as protons or neutrons or may be gamma irradiation. Heat treatment of the irradiated particles in a non- oxidising atmosphere results in a further alteration in their friability. In the case of SD and MD diamond particles, neutron fluxes of greater than 10<SP>20</SP> neutrons/cm.<SP>2</SP> results in a lowering of the impact resistance of the particle, but the impact resistance can then be increased by subsequent heat treatment.
Patent GB-1117174-A (GB)
Title: Improvements in or relating to boot seal retainers
Inventor: HERBENAR EDWARD JOHN
IPC: F16C11/06
Filed: 1967-02-14
Abstract: 1,117,174. Ball joints; sealing boot. TRW Inc. 14 Feb., 1967, No. 7135/67. Heading E2F. [Also in Division F2] The boot seal 25 of a ball joint is retained in position on the socket 12 by means of a harness having means such as straps 39 which embrace the bottom of the socket. The socket may be forged and the end flange spun-in to receive a closure plate 17.