baber/WOPTO huggingface dataset:
Patent GB-874680-A (GB)
Title: Improvements in or relating to microwave receiving circuits
Inventor: DAIN JOHN
IPC: H01J25/12
Filed: 1958-06-18
Abstract: 874,680. Valve super-generative receivers. ENGLISH ELECTRIC VALVE CO. Ltd. Feb. 27, 1959 [June 18, 1958], No. 19501/58. Class 40(5) A micro-wave super-regenerative receiver comprises a klystron type valve arranged to oscillate at the signal frequency, means for periodically quenching the oscillations, means for applying the input signal to one resonator of the valve and means for taking a quenched oscillatory output from another resonator of the valve. Fig. 3 shows a so-called "floating drift tube" klystron valve in which the drift tube 56 is arranged in a resonator 55 so as to cause oscillations to occur at the frequency of a modulated signal applied through terminal 10 to a first resonator 53. A quenching oscillation is applied at terminals 59, 60 to vary the electron transit time between the points at which oscillatory energy is given up to and taken from the electron beam so as to periodically quench the oscillations and the output signal, consisting of bursts of oscillations, are extracted from a loop 62 and applied to a detector 13. The oscillatory assembly 55, 56 may be replaced by two cavity resonators having a feed back connection so as to cause the klystron to oscillate the quench oscillations being applied between the cathode and electrode 54 (Fig. 4, not shown). Alternatively, a reflexed klystron may be used, in which case a single output cavity only is required quench oscillations being applied to the reflector electrode (Fig. 2, not shown).
Patent GB-280501-A (GB)
Title: A process for recovering concentrated acetic acid from dilute acetic acid
IPC: C07C51/44
Filed: 1927-07-22
Abstract: 280,501. Suida, H. Nov. 9, 1926, [Convention date]. Acetic acid.-In the process for the production of concentrated acetic acid from its aqueous solutions by treating the superheated vapour with solvents having materially higher boiling points than acetic acid, the solvents employed are acylated or acetylated products formed from compounds containing hydroxyl groups such as glycol, glycerine, butylene glycol, heavy wood-tar oils, or brown coal creosotes or other alcohols and phenols. Amyl butyrate, hexyl acetate and amyl acetate are also mentioned. The acetylation can be effected during the circulation of the hydroxylcontaining body in the extraction apparatus during the first extraction if it is effected with concentrated acetic acid. Specification 230,447 is referred to. The Specification as open to inspection under Sect. 91 (3 (a) includes the use of butyl acetate. This subject-matter does not appear in the Specification as accepted.
Patent GB-639541-A (GB)
Title: Improvements in television systems and the like
IPC: H04N5/08
Filed: 1946-07-01
Abstract: 639,541. Television. BUSH RADIO, Ltd., HARRISON, W. H., and WRIGHT, K. M. B. July 1, 1946, No. 19593. [Class 40 (iii)] In a conventional diode, condenser and resistance arrangement for separating synchronizing pulses from a composite signal train changes in the average value of the composite signal are prevented from affecting the separated synchronizing pulses by applying a biassing potential to stabilize the discharge rate of the condenser. The composite signal, developed across R2, is applied to a separator circuit including condenser C1, resistance R3, diode V2 and resistance R6, the line and frame synchronizing pulses being available at condensers C2 and C4 respectively, as in the prior art. With this arrangement it is stated, a sudden change of video signal would cause the synchronizing pulse output either to include part of the video signal or, alternatively, to disappear altogether. This effect is overcome in accordance with the present invention by introducing into the discharge circuit of C1, by means of the potential divider R4, R5, a standing voltage which tends to stabilize the discharging of the condenser.
Patent GB-530919-A (GB)
Title: Buffer devices for friction clutches
IPC: F16D13/54
Filed: 1939-07-06
Abstract: 530,919. Friction clutches. TAYLOR, L. July 6, 1939, No. 19652. [Class 80 (ii)] In friction clutches, of the Weston type, the pressure sleeve 1, Fig. 5, acts upon the plates through a number of circumferentially arranged buffer devices arranged in sockets or recesses 2 in the pressure sleeve. Each buffer device comprises a small cylindrical shaped block of oil-resisting rubber a, Fig. 1, with a metallic head b with enlargement b<1>, the head having a shank b<2> to engage the block. The rubber portion is enveloped by the recess, only the metallic head protruding. Specification 457,206 is referred to. According to the Provisional Specification, the rubber block may be encased in a small open-ended cylinder into which a metallic head is fitted.
Patent GB-275604-A (GB)
IPC: C08G63/12
Filed: 1927-07-26
Abstract: 275,604. Bakelite Corporation. (Assignees of Schmidt, J. H.). Aug. 3, 1926, [Convention date]. Varnishes.-The production of resins of the glycerol-phthalic anhydride type is effected in two stages, in the first of which the reaction mixture is heated to incipient gelatinization and solvents of high boiling-point are absent or present only in small amount, and in the second of which the reaction is continued in the presence of a solvent of high boiling-point. In an example, a mixture of glycerol and phthalic anhydride is boiled, with removal of the water of reaction, until gelatinization sets in, whereafter there is added a solvent of high boiling-point such as diethyl oxalate, glycol diacetate, or diethyl or dibutyl phthalate or tartrate. The mixture is then boiled until gelatinization sets in again. Polyglycerols may be used instead of glycerol, and organic acids such as maleic, succinic, or malic acid, or their anhydrides, alone or in admixture, may be used instead of phthalic anhydride. The products may be diluted with a solvent of medium boiling-point and used as lacquer or varnishes ; suitable solvents of medium boiling-point are ethyl lactate, diethyl carbonate, and the ethyl ether of ethylene glycol. Alternatively the diluted products may be further diluted with a solvent of low boiling-point, such as alcohol or ethyl acetate, and mixed with white or other pigments to form enamels; films of such enamels may be rendered resistant by baking.
Patent GB-762040-A (GB)
Title: Improvements in or relating to tread surfaces on extruded metal sections
Inventor: GOODWIN HAROLD
IPC: E04F11/112
Filed: 1954-07-07
Abstract: 762,040. Making floor and stair treads; forging; stamping. BIRMETALS, Ltd. July 7, 1955 [July 7, 1954], No. 19853/54. Classes 83 (2) and 83 (4). [Also in Group X] A method of making a metal section with a raised tread pattern, for use as a floor, deck, stair or like tread member, comprises forming by extrusion the section 10 with a plain surface and subsequently raising a tread pattern on said surface by die pressing or stamping. The extruded section is preferably of heat-treated magnesium silicide alloy. The tread pattern preferably comprises a series of studs 18 which are formed by stamping the wall 29 of the section between dies 24, 25. The section rests on rollers 23 and is moved in steps between pressing operations whereby the pattern is repeated along the length of the extruded section. The rollers 23 and a member 31 facilitate the stripping of the section from the dies during the retraction of the latter. In another embodiment, Fig. 8, the stud pattern is produced by upsetting the wall 29 between dies 27, 28, the latter being provided with recesses 30. The extruded section may alternatively be of angle or Tee form, Figs. 5, 6 (not shown), the stud pattern is preferably as shown in Registered Design No. 860,921. The studs may be of conical or of full or truncated pyramidal form; alternatively ribs may be formed instead of studs.
Patent GB-531015-A (GB)
Title: Improvements in or relating to a process of producing large crystals of ergosterol, and the product resulting therefrom
IPC: C07J9/00
Filed: 1939-07-08
Abstract: 531,015. Ergosterol. GENERAL MILLS, Inc. July 8, 1939, No. 19957. Convention date, July 9, 1938. [Class 2 (iii)] Large crystals of ergosterol are made by recrystallization from an organic solvent which contains 0.2-3 per cent. of water by volume. Suitable organic solvents are ethyl acetate or a mixture of ethyl acetate with ethyl alcohol or of benzene with ethyl alcohol. The ergostercl may be dissolved in the solvent heated to boiling, and then slowly cooled. The crystals may be washed with ethyl acetate.
Patent GB-147924-A (GB)
Title: Improvements in metal saws and other machine tools
IPC: B23D47/08
Filed: 1920-07-09
Abstract: 147,924. Wagner (nÚe Stadelmeyer), L. Sept. 24, 1918, [Convention date]. Void [Published under Sect. 91 of the Act]. Driving machines.-Relates to cutter-spindle feed-motions for machine tools and consists in a special arrangement for reducing the tension of the feed belt to cause slip on feed pressure becoming excessive, described with reference to a machine for cold sawing metal. The pulley d for the feed belt f is driven by a gear c so mounted on a lever g as to be planetary to a driving-gear b. On feed pressure becoming excessive, the feed-nut for the cutter spindle reacts on a lever system i, h and raises the lever g to stop or retard the feed. When the pressure returns to normal value, a counterweight restores the lever system to the wording position.
Patent GB-962264-A (GB)
Title: Improvements in or relating to pulse delay circuit arrangements
Inventor: HELSDON PETER BENNETT
IPC: H03K3/315
Filed: 1961-06-02
Abstract: 962,264. Pulse circuits. MARCONI CO. Ltd. April 24, 1962 [June 2, 1961], No. 19985/61. Heading H3T. A pulse delaying circuit comprises a capacitor 6 charged from a source 12 via a diode 10 and inductor 9 and discharged via an inductor 5 and a diode 4 when a pulse-controlled switching device (such as transistor 2) is operated. A delayed pulse is obtained across a currentsensitive device such as tunnel diode 11) in the charging circuit. Capacitor 6 is preferably charged negatively via inductor 9, diode 15<1> and tunnel diode 7<1> and discharged via diodes 4, 15 and tunnel diode 7 when tran sistor 2 is pulsed at a (Fig. 2). The voltage across the capacitor 6 thus executes a half-cycleat the natural frequency of components 5, 6 as shown at c. Diode 4 now becomes nonconductive, hence capacitor 6 now executes a half-cycle at the natural frequency of components 6, 9. The tunnel diodes 7, 7<1>, 11 provide a transient whenever the current passes through their negative resistance regions so that a pulse e of reduced duration is available at 13, a delayed pulse f of increased duration at 14<1> and a negative pulse (not shown), starting at T2 and ending at T3 is available at 13<1>. In Fig. 4 (not shown), a further diode is connected in parallel opposition with diodes 15, 7. Fig. 5 (not shown), relates to two such circuits controlled by a common transistor. Monostable state circuits.-Transistor 2 may be controlled by the output of a bi-stable circuit which is reset by a delayed pulse from terminals 13.
Patent GB-738224-A (GB)
Title: Improvements relating to means for supporting curtains
Inventor: SMITH ANTHONY HOWARD
IPC: A47H13/10
Filed: 1953-07-20
Abstract: 738,224. Curtain runners. SMITH & DAVIS, Ltd. July 15, 1954 [July 20, 1953], No. 20006/53. Class 52 (5). A master curtain runner to which draw-cords are attached comprises a channel-section frame, the base of which is slotted and which supports pairs of rollers mounted one at each end of a U-shape curtain carrying member which is inserted through the slot, from the opening in the frame, the sides of the frame being subsequently displaced inwardly to retain the carrying member. As shown, a curtain carry. ing member 12 having rollers 13 and a curtain ring 14 is received in the opened-out frame 10 which is appropriately slotted at 19 and 21, the sides 15 of the frame being subsequently pressed together so that the width at the open. ing is less than the width of the member 12.
Patent GB-243082-A (GB)
Title: Improvements in or relating to chain elevators, conveyers or the like for storing ordisplaying goods
IPC: B65G1/127
Filed: 1924-08-25
Abstract: 243,082. Goodson, W. G. Aug. 25, 1924. Endless chain and like carriers. apparatus with. - A chain conveyer or elevator for storing or displaying goods comprises shelves or boxes F pivoted at D<7> upon arms D<8> projecting from vertically arranged chains, the links of which are provided with stops D<5> that permit the chain to bend in the direction necessary for passing around the sprocket wheels C, E, but prevent it from bending in the opposite direction under the weight of the shelves or boxes. The chains are propelled by means of a chain J and a hand-wheel K<2>. To prevent the boxes &c. from swinging when passing around the sprocket wheels, a wheel L rotated by the chains near their upper end is provided with notches L<2> in its periphery and is arranged so that rollers F<1> mounted on the boxes ride in the notches, and at the lower end of the apparatus guideways M are formed to receive the rollers F'.
Patent GB-831065-A (GB)
Title: Improvements in and relating to the manufacture of threads, fibres, filaments and the like from viscose
Inventor: TOMS BRIAN ATKINSON
IPC: D01F11/02
Filed: 1955-07-12
Abstract: Threads of cellulosic products are produced by extruding viscose of gamma value 15-45 into an aqueous coagulating solution of sodium bicarbonate, of greater than 50% saturation, at 35-45 DEG  C. to form water-soluble threads of sodium cellulose xanthate, removing the water-soluble threads from the coagulating solution and treating them with one or more reactants to convert the sodium cellulose xanthate into a stable cellulose derivative.  After removal from the coagulating bath, the freshly formed sodium cellulose xanthate threads are preferably washed with sodium chloride solution or with sodium bicarbonate solution, alone or followed by a mixture of two volumes of acetone with one volume of water, and finally with acetone alone, and are then air-dried. The acetone may be replaced by ethyl or methyl alcohol.  The solubility of the air-dry sodium cellulose xanthate threads p  depends upon the age of the viscose prior to spinning.  The sodium bicarbonate may be replaced by potassium bicarbonate or ammonium bicarbonate and the threads may be stretched either during spinning or after washing with the acetone-water mixture.  The threads of sodium cellulose xanthate may be converted partly (i.e. on the surface only) or completely to threads of regenerated cellulose by suitable treatment, e.g. with dilute acids, mixtures or alcohol and water, and hot water, either directly or after immersion in aqueous solutions of salts of metals, e.g. calcium, zinc and thallium.  Treatment of threads of sodium cellulose xanthate with methyl iodide gives threads of methyl cellulose xanthate, and treatment with sodium monochloracetate gives threads of sodium cellulose xantho acetate which upon subsequent reaction with dilute mineral acid, give threads of cellulose xanthoacetic acid. Threads of cellulose thiourethane (cellulose xanthamide) are obtained by reaction of threads of methyl cellulose xanthate, or of sodium cellulose xantho-acetate, with ammonia. Specification 183,882 is referred to.
Patent GB-354021-A (GB)
Title: Improvements in means for connecting the ends of frame members to the brackets of bedsteads
IPC: F16B12/56
Filed: 1930-07-03
Abstract: 354,021. Bedstead joints. BRAD. STEDS, Ltd., and PURDY, W. R., Highfield Works, Bradley, near Bilston, Staffordshire. July 3, 1930, No. 20148. [Class 52 (ii).] In a bedstead comer joint the bracket A has formed in its upper surface a depression a<2>, surrounding the securing bolt C and deep enough to house the end of the horizontal flange d of the transverse frame member D, the rest a, a<1> of the upper part of the bracket, beyond each end of the depression, being of full height and serving to support the end of the horizontal flange b of the longitudinal frame member B. At one or each end of the depression a<2>, a narrow transverse recess a<3> may be formed to receive a shallow portion d<2> of the vertical flange d<1> of the transverse member D. The bolt C may be secured to the bracket A by means of a cup washer c placed in an annular recess a<4> and then flattened, and the transverse and longitudinal members D, B may be permanently secured together, as by hollow rivets E.
Patent GB-183711-A (GB)
Title: Improvements in or relating to differential gear mechanism
IPC: F16H48/30
Filed: 1921-07-27
Abstract: 183,711. Indahl, M. C., and Dove, J. M. July 27, 1921. Balance gearing suitable for motor vehicles is provided with governing-mechanism permitting at all times differential action but limiting such action to a predetermined ratio so as to produce a kind of lock if one wheel slips. In the application to gearing of the kind having interengaging planet gears 13, 14, Figs. 1 and 2, driving sun gears 11, 12 differentially, a medial element 22 is driven at a speed proportional to but less than the average of the speeds of the gears 11, 12, and a ratchet clutch acts to prevent either of the gears 11, 12 from rotating at less than this speed. This gear 22 is driven from a planet gear 19 carried by the differential casing 6, which is driven from a larger planet gear 18 meshing with a central gear 15 which can be held fast by a sliding bolt 16. The gear 22 is provided with bosses 21 which pass within the gears 11, 12 and have recesses 23, Figs. 5 and 6, with rollers 24 adapted to effect one-way clutch connections with such gears. Springs 27 connected to the gear 22 at 28, and to cages 26 carrying the rollers 24 at 29 tend to turn the cages so as to bring the clutches into action. Normally the pinion 15 is fixed and the gear 22 turns at less than the average speed of the gears 11, 12 in the same direction. The gears 11, 12 overrun the clutches. When one differential shaft 4 or 5 slips and runs fast, the other runs more slowly, until it approximates to the speed of the gear 22, upon which a clutch spring 27 asserts itself, preventing further slowing down, and in effect locking the differential. The arrangement so far described would lock on reversed driving, which lock is prevented by withdrawing the plunger 16 by means connected to the reversing-lever. Provision is made for rendering the governed gearing reversible by providing a second central pinion 32 adapted to be held by a plunger 33 when reversed driving is required. The gear 32 is connected to the gear 22 through a gear 31, Fig. 1, and a second planetary shaft 30, Fig. 2, which carries a gear meshing with the gear 18, Fig. 1. The gear 22 is then driven reversely with the gears 11, 12 but at a speed greater than the average, so that again the clutches are inactive unless one of the gears 11, 12 slows down unduly. When the invention is applied to balance gearing of the bevel type, the ratchet clutches are separate and are connected to duplicated gears corresponding to the gear 22. The plungers 16, 33 may be connected by a yoke operated from the gear control.
Patent GB-1047767-A (GB)
Title: Aromatic carbonates
IPC: C08G64/26
Filed: 1964-05-14
Abstract: The invention comprises unsymmetrical dimeric aromatic carbonate of the formula <FORM:1047767/C2/1> wherein R1 and R4 are halogen or alkyl radicals, R2 and R3 are alkylidene radicals, p and q are 0, 1 or 2 and R1 differs from R4; and a process for preparing symmetrical and unsymmetrical cyclic aromatic carbonates by reacting at temperatures in the range - 10 DEG  to 75 DEG  C., in the presence of an acid acceptor, a dihydric phenol of the formula <FORM:1047767/C2/2> with a bishaloformate of a dihydric phenol of the formula <FORM:1047767/C2/3> where R1 and R4 are the same or different and are halogen or alkyl radicals, R2 and R3 are the same or different alkylidene radicals and p and q are the same or different and are 0, 1 or 2.  The bischloroformates are preferred reactants as they are easily prepared from the appropriate phenol and phosgene. Suitable acid acceptors are the oxides and hydroxides of the alkaline earth and alkali metals and tertiary amines.  When an amine is used, it may act as a solvent; alternatively, an additional inert solvent may be used.  It is preferred to keep the weight ratio of total reactants to solvent below 0.2.  Examples describe the preparation of the bischloroformate starting materials and the dimers in which R2 and R3 are methylene and R1 and R4 are methyl and/or chloro radicals.ALSO:Linear aromatic polycarbonates are obtained by heating one or more dimers of the formula <FORM:1047767/C3/1> wherein R1 and R4 are the same or different and are alkyl or halogen radicals, R2 and R3 are the same or different alkylidene radicals and p and q are the same or different and are 0, 1 or 2, either in a fusion cook or solvent system, optionally in the presence of a basic catalyst, e.g. an alkali metal, or hydroxide, carbonate, alkoxide or an aryloxide thereof, a quaternary ammonium hydroxide or an organometallic such as phenyl lithium, butyl lithium or a Grignard reagent. Polymerization temperatures depend on the reaction system, e.g. 350 DEG  C. for a fusion cook method, 100 DEG  C. in a solvent system. The amount of catalyst may vary from 0.001 to 3% by weight of the dimer.  Molecular weight regulators, e.g. monofunctional phenols and alcohols, may be added to the reaction system.  Example 7 relates to the polymerization of the cyclic dimer of 2,21-dihydroxy-5,51-dimethyldiphenylmethane.
Patent GB-638923-A (GB)
Title: Improvements relating to the exhaust systems of two-stroke cycle internal combustionengines
IPC: F01N5/00
Filed: 1947-07-28
Abstract: 638,923. Pumps. CROSSLEY BROS., Ltd., and CARTER, H. D. July 28, 1947, No. 20238. [Class 7 (ii)] [Also in Group XXVIII] In a multi-cylinder two-stroke engine the variations in pressure in the exhaust manifold j, k act on a piston n or a diaphragm to compress air, which may be used for engine scavenging or charging, or to do other useful work. As shown, the manifold is divided and the exhaust pulses act alternately on opposite sides of the piston n which is connected to a double-acting pump piston o and a cushioning piston p which may however be replaced by springs. The pressure pulses may act on one side of a piston, or on each of a pair of balanced pistons, the opposite sides of which compress the air. The exhaust connections may be arranged so that the pistons are first acted on by the flow of exhaust and then by the pressure pulse. Specification 581,216 is referred to.