baber/WOPTO huggingface dataset:
Patent GB-760651-A (GB)
Title: Improvements in and relating to tuning means for radio apparatus
IPC: H03J7/30
Filed: 1954-10-18
Abstract: 760,651. Automatic tuning of radio receivers. GENERAL MOTORS CORPORATION. Oct. 18, 1954 [Nov. 13, 1953], No. 29857/54. Class 40(5) In a radio receiver of the type in which the tuning is automatically swept over the wave range until a signal is tuned in, means are provided which after a return movement of the tuner completes a shunt operating path for the tuner control relay. The invention is described with reference to a circuit similar to that disclosed in Specification 721,805. On operation of a button 95 a relay 68 operates and unlocks the tuner allowing the tuning to proceed under the action of a spring until a signal is tuned in which produces a sufficiently strong positive voltage on lead 34 to cause the valve 38 to release the relay and stop the tuning. If the tuner reaches the end of its range a solenoid 84 is energized by a limit switch 92 and this returns the tuner to the beginning of the range and recharges the spring. As spurious pulses sometimes occur during the rapid return stroke and release the relay 68, a contact 104 is provided which is contacted by the pointer 106 at the beginning of the range to provide an operating circuit to earth for the relay coil. As in the aforementioned Specification buttons 108, 110, 112, 114 and 116 are provided which disable the relay releasing circuit except in narrow bands including desired stations. In this case however the disabling is effected, by disconnecting the sensitivity control switch 16 from earth so that the sensitivity control line 156 is earthed only in the bands including the desired stations.
Patent GB-519005-A (GB)
Title: Improvements in photographic exposure meters
IPC: G01J1/14
Filed: 1938-10-14
Abstract: 519,005. Photographic cameras; exposure meters. BING, J. M. Oct. 14, 1938, No. 29863. Convention date, July 1. [Classes 97 (i) and 98 (i)] A photographic exposure meter of the extinction type comprises a flat casing 10 having an apertured front wall which may be covered by frosted glass 12, an intermediate optical wedge 13 of graduated density bearing extinction markings which may take the form of camera diaphragm numbers, and an inclined mirror 14 at the rear which reflects an image of the wedge upwards to the observer through an aperture in the casing which may be provided with a cylindrical magnifying lens (Fig. 17 not shown) and with a hinged cover 15 serving also as a hood in use. The main cover 11 of the casing may carry an exposure calculator consisting of an annular diaphragm (or shutter-speed) scale 18 rotatable between a fixed plate-speed scale 20 and a fixed shutter-speed (or diaphragm) scale 22. The shutter-speed scale may consist of several concentric rings as shown; each appropriate to a certain range of subject lighting. The wedge 13 may comprise a sheet of continuously-varying or stepped opacity superimposed either on a transparent sheet bearing opaque numbers or on an opaque sheet bearing transparent numbers; and the density variation along the wedge may be linear, or may follow a non-linear law to take account of greater acuity of vision at low brightness. The meter may be mounted on various cameras in various ways. For example, it may be hinged to the folding baseboard of a collapsable bellows camera so as to project forwardly or to one side in use,' and fold upon the baseboard or a side wall of the camera when not in use; or it may -be fixed on the folding baseboard, the calculator in this case being preferably mounted separately on a side wall of the camera; or it may be mounted above a reflex finder lens or above the finder lens of a twin-lens camera having a reflex finding chamber above the exposure chamber so that its indications may be seen adjacent to the image in the finder hood; while in a further modification, it may be mounted on the top of the lens and shutter casing of a bellows camera, and a pointer connected to the lens diaphragm adjusting-ring may move over the meter scale so that the diaphragm is set automatically when the ring is adjusted to bring the pointer to the extinction point of the meter scale. The Specification as open to inspection under Sect. 91 describes also a form of meter, without the mirror 14, associated with or forming part of a direct-vision, lens-type view finder. This subject-matter does not appear in the Specification as accepted.
Patent GB-268000-A (GB)
Title: A machine for pressing stoppers, corks, lids or other closures into bottles, jars and the like
IPC: B67B1/04
Filed: 1925-11-26
Abstract: 268,000. Broadhurst, H. F., and Albro Fillers & Engineering Co., Ltd. Nov. 26, 1925. Corking; stoppering. - A machine for pressing stoppers, corks, lids, &c. into bottles, jars, tins. &c. comprises two converging conveyers 5, 23 which travel in the same direction at the same speed. Bottles &c. x with their closures loosely inserted, are placed on the lower belt 5 and are carried along between the conveyers which subject them to a wedging action whereby the closures are forced home. Rollers 10 are provided behind the belts to prevent longitudinal flexing. The frame 15 carrying the upper belt is pivotally mounted at 25 and its inclination relative to the lower belt is adjusted by a hand-wheel operated screw 35. The tension of the belt is controlled by adjusting the counterweight 27b.
Patent GB-848426-A (GB)
Title: Improvements in or relating to frequency marking systems
Inventor: SEYMOUR RONALD ARTHUR
IPC: G01R13/30
Filed: 1957-09-23
Abstract: 848,426. Cathode-ray oscillographs. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Dec. 23, 1958 [Dec. 23, 1957], No. 29887/57. Class 40(7). [Also in Group XXXVI] In a frequency marking system in which scanning signals whose frequency varies with time are fed to one input of a modulator and reference signals from a harmonic generator are fed to a second input of the modulator, part of the output from the modulator is fed back to the harmonic generator so as to produce isochronism over a limited frequency range between the output of the harmonic generator and the scanning signal fed to the modulator. The system is used to calibrate test equipment in which a parameter is displayed on a C.R.T. as a function of frequency. In one embodiment the harmonic generator is a blocking oscillator 1 which oscillates at 1000, 500 or 250 kc./s., the output being mixed in modulator 2 with the scanning signal which sweeps from 50 kc/s. to 13 mc/s. Low pass filter 4 has a cut-off frequency fc and passes beat frequencies below this value to an amplifier 5 and thence via cathode follower 10 to an input of oscillator 1. When the beat frequency approaches the output frequency of oscillator 1, the latter is "pulled" into step with the scanning signal over a limited frequency range, the centre frequency of which equals that of the free-running oscillator. The output of modulator 2 under these conditions contains a low frequency component whose amplitude depends on the phase difference between the two equi-frequency inputs. Filter 7 has a cut-off frequency which is much lower than fc and passes the low frequency component, which, after amplification and phase inversion in amplifier 8, is applied to a pulse generator 9 to produce a positive pulse at the precise instant that the frequency of the scanning signal equals that of the free-running oscillator 1. Gain control stage 6 compensates for the falling gain-frequency characteristic of amplifier 3 and frequency discriminator 11 ensures the long-term stability of oscillator 1.
Patent GB-797876-A (GB)
Title: Improvements in or relating to the treatment of coke oven gas
IPC: C10K1/10
Filed: 1955-10-19
Abstract: 797,876. Purifying gas. BERGEWERKSc VERBAND ZUR VERWERTUNG VON SCHUTZRECHTEN DER KOHLENTECHNIK GES. Oct. 19, 1955 [Dec. 11, 1954], No. 29889/55. Class 55 (2). Hydrogen sulphide, ammonia, and, if required, carbon dioxide are removed from cokeoven gases by scrubbing with ammonia water at a pressure of 7-11 atmospheres to remove the hydrogen sulphide, the ammonia water being circulated between the scrubber and a dissociator, and subsequently removing the bulk of ammonia and, if required, the residual carbon dioxide under a pressure of about 20 atmospheres by washing with dilute ammonia water or fresh water. The gas may be compressed in a multi-stage compressor, the gas having passed the second stage being withdrawn, subjected to the hydrogen sulphide scrubbing process, and then returned to the compressor, the ammonia being removed after the third, fourth or fifth compression stages. In an example, 6 per cent ammonia water was used.
Patent GB-1119599-A (GB)
Title: Improvements in cable glands
IPC: H02G3/06
Filed: 1966-07-04
Abstract: 1,119,599. Cable glands. J. W. VON EHRENBERG. 4 July, 1966 [9 July, 1965], No. 29896/66. Heading H2E. A cable gland for armoured cables comprises a socket 2 into which the cable 6 is inserted and a spigot 13 which is screwed into the socket to engage the underside of the armouring wires splayed out against a washer 7 located against a shoulder 4. As shown, the spigot 13 is screwed into a plug 10, itself screwed into the socket 2. A thread 5 in the socket 2 serves to secure the gland to a support or to receive a rubber weather-proofing boot fitted over the cable, and a thread 18 on the spigot 13 serves to secure the gland to a junction box. A resilient sealing ring may be arranged within the socket and around the cable. In an alternative arrangement (Fig. 2, not shown) the spigot 13 is screwed directly into one end of the socket 2 and the other end of the socket is internally threaded to receive a plug which encircles the cable and which provides the shoulder for the washer.
Patent GB-583021-A (GB)
Title: Improvements relating to the production of condensation products of the furylmethane derivative type
IPC: C07D307/50
Filed: 1939-11-11
Abstract: In the production of water-insoluble condensation products of the furylmethane derivative type obtained by reacting aromatic or hydro-aromatic compounds having one or more free or substituted hydroxyl or amino groups with carbohydrates in the presence of acids or an acid-forming compound capable of causing the conversion of the carbohydrate to furfural, the temperature is kept constant throughout the reaction and only so much furfural compound is formed at any time as can actually combine with the aromatic or hydro-aromatic compound (a) by maintaining the aromatic or hydro-aromatic compound in excess throughout the reaction, or (b) by feeding the carbohydrate and acid in molar ratio and maintaining the feed of aromatic compound in molar ratio to the amount of furfural derivative thus formed. Carbohydrates specified are glycose, mannose, dextrine starch, hexoses and polyoses while aromatic or hydro-aromatic compounds comprise phenol, cresol, quinol, resorcinol, aniline, mono- or di-methyl-aniline, aminophenols, hydroaniline or mono- or di-methylhydroaniline.  The furylmethane derivatives may be further reacted with (a) formaldehyde, hexamine or alkali to give a thermosetting resin, (b) by sulphonation to give dyeing or tanning agents.  In examples: (1) a diphenyl-furyl-methane compound is obtained by dissolving resorcinol in hydrochloric acid and reacting at 50 DEG  C. or 90 DEG  C. with fructose or glucose.  The red solid obtained is soluble in alcohol or benzene, but not in benzene and can be converted to a thermosetting resin by reaction with formaldehyde or to a water-soluble substance by sulphonation; (2)-(5) sulphonated phenols are reacted with glucose, sucrose and saccharose; (6) dimethylaniline and sucrose are reacted in presence of phosphorus oxychloride.
Patent GB-212281-A (GB)
Title: Improvements in electric switches
IPC: H01H9/00
Filed: 1922-11-03
Abstract: 212,281. Waller, P. H. Nov. 3, 1922. Electrically-tripped switches.- Depression of an arm 1 rotates a shaft 2 and causes the closing of an auxiliary circuit at the contacts 3, 10<a>; the auxiliary circuit contains an electromagnet 17 which actuates a catch 13 to release a spring actuated member 11<a> which moves to break the auxiliary circuit at 18 and to close the main circuit at 19. The switch members 3, 11<a>, though shown separately in the Figures, are mounted on the same shaft 2, the member 3 being fixed to the shaft 2 and the arm 1, and the member 11<a> being mounted loosely on the shaft 2. Fixed to the switch member 3 is a cam 3<a> which co-operates with a catch 4 to cause the temporary opening of contacts 7, 8 in the auxiliary circuit when the arm 1 is depressed, the arrangement being such that the auxiliary circuit cannot be completed till the cam 3<a> has slipped past the catch 4 and is locked against return. The main circuit is opened and the apparatus reset by energization of an electromagnet 10 which withdraws the latch 4 and allows the member 3 to move away from the contact 10<a> under spring actuation. Simultaneously a stop 20 on the member 3 engages a stop 21 on the member 11<a> moving the latter back into engagement with contact 18. Specification 168,122 is referred to.
Patent GB-488520-A (GB)
Title: Improvements in or relating to directional antenna systems
IPC: H01Q11/04
Filed: 1937-11-03
Abstract: 488,520. Directive wireless signalling. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Nov. 3, 1937, No. 30147. Convention date, Nov. 13, 1936. [Class 40 (v)] Relates to directive wireless arrays of the kind in which a number of half-wave radiators 1 separated by insulators IN are arranged in substantially the same line and are associated with a similar " line " of radiators 2, spaced approximately half a wavelength away. According to the invention, vertical connecting wires 3, 4 between the two " lines " are provided with coupling " bridges " 7, 8 which are symmetrically arranged on each side of the centre for adjusting the current and phase relations in the radiators. The array is fed from a source 5, through an impedance-matching circuit 6, and a mid-point tapping to the middle pair of conductors 3<1>, 4<1>, and then by co-phasial energization of the other radiators. The bridging strips 7, 8 are located at voltage nodes, so that the wires 3, 4 do not radiate, and need not be insulated from the antennae 1, 2. The tuning effect of the strips 7, 8 may be used to offset irregularities in the insulation and spacing of the two sets of radiators, and also to adjust the array to receive a wide range of wavelengths. The average distance between the " lines " 1, 2 is preferably seventenths of the working wavelength.
Patent GB-734358-A (GB)
Title: Improved liquid filter
Inventor: BUCKMAN KENNETH ERNEST
IPC: B01D29/00
Filed: 1952-11-28
Abstract: 734,358. Filters. GENERAL MOTORS, Ltd. Sept. 15, 1953 [Nov. 28, 1952], No. 30163/52. Class 46. In a liquid filter having an element 28, Fig. 2, formed with a plurality of doublewalled longitudinal folds 42, Fig. 3, radiating from a central tube 41, the outer edge of at least one fold 42 is bifurcated to provide two double-walled branch folds 44. The filter material 40 comprises resin impregnated paper having corrugations to effect spacing of adjacent walls of the folds and the ends 45, 46 are adhesively sealed to end plates 47, 48. The element as a whole is mounted for inward flow between a support 30 and an inlet and outlet assembly 21 by a hollow perforated tiebolt 24 and nut 23. A spring-pressed ball 35 allows the element 28 to be by-passed in the event of abnormally high back pressure being developed. In a modification alternate folds only are bifurcated. The recesses between branch folds may vary in radial depth, the branch folds 44 may be themselves bifurcated and the tertiary branches so formed may be inclined at different angles to the radius.
Patent GB-647541-A (GB)
Title: Improvements relating to cameras
IPC: G02B23/14
Filed: 1947-11-13
Abstract: A mirror consists of an integral synthetic member, e.g metacrylic resin covered, e.g. by deposit under vacuum, with an adherent metal film.
Patent GB-445250-A (GB)
Title: Improvements relating to the intermittent operation of externally heated coke ovens or retorts
IPC: C10B27/02
Filed: 1935-11-01
Abstract: 445,250. Coke ovens. STILL, C., Recklinghausen, Westphalia, Germany. Nov. 1, 1935, No. 30230. [Class 55 (i)] Distillates are withdrawn from a coke oven charge from the space 10 over the charge to an off-take 12 leading to an hydraulic main 14, and from ducts 11 formed in the charge, through inserted pipes 18 which lead by branches 21 to a pipe 22 and second hydraulic main 24. A pressure of 1-2 mm. of water is maintained in the space 10, and a vacuum of 50 to 300 mm. may be used in the inner ducts 11, and to maintain this difference of pressure a seal is formed between the pipes 18, and the fuel mass, which seal may consist of a ring of pitch which melts on heating. The seal may be provided by the bitumen originating from the charge, if the arch of the oven roof radiates sufficient heat to convert the surface layer into a plastic mass. Alternatively, a hollow member 28 may contain the pitch which may be added, in a liquid condition, through a pipe 29, after insertion of each tube 18 and member 28. The packing mass may be caused to solidify around the pipe 18 before the latter is placed in position. The difference between the pressures in the space 10 above the charge, and in the ducts 11, is regulated by a throttle valve 16 in the ascension pipe 17, and a valve 23 in the main 22, valves also being provided in the branch pipes 21.
Patent GB-188655-A (GB)
Title: Improvements in the construction of two-cycle internal combustion motors
IPC: F02B25/00
Filed: 1922-11-04
Abstract: 188,655. Soc. Anon. des Ateliers d'Aviation L. BrÚguet. Nov. 14, 1921, [Convention date]. Cylinders receiving liquid fuel. - Air which is highly compressed in a pump b is delivered into the moter cylinder a at the beginning of the power piston outstroke through a passage c into which fuel is simultaneously injected through a nozzle g. The power piston is slightly in advance of the pump piston.
Patent GB-243181-A (GB)
Title: Improvements in and relating to crossings for overhead electric conductors
IPC: B60M1/14
Filed: 1924-12-16
Abstract: 243,181. Wiseman, A., Harris, J. W., and Dudgeon, H. M. Dec. 16,1924. Crossings for conductors are provided with an insulating bar d having metal end pieces c, f for rigid connection with the crossing a and the adjacent conductor. As shown, the end pieces c are flanged to engage similar flanges b in the crossing a, but they may have overlapping or telescoping portions such as a tongue on the piece c engaging a wire groove on the crossing a.
Patent GB-675312-A (GB)
Title: Improvements in and relating to greenhouses and like structures
IPC: A01G9/14
Filed: 1949-11-25
Abstract: 675,312. Concrete frame component. PRECAST UTILITIES (LONDON), Ltd., BARRATT, W. J., and MARTIN, H. L. Feb. 23, 1951 [Nov. 25, 1949],. No. 30256/50. Class 20(iv) Concrete frame components, e.g. a gutter, Fig. 1, for greenhouses or like structures, comprise a part 1 made of concrete from a standard mix and a part 6 which is produced by mixing foamed slag with cement so that other components such as glazing bars can be nailed to it. The gutter reinforced by rods 7, 8 is secured to a gutter tree 4 by bolts 3 the heads of which are covered with bitumen in recesses 9 along the bottom of the gutter. The ends of the latter are preferably rebated to facilitate the joining, e.g. by bitumen, of adjacent components. To make a length of guttering, foam slag 6 comprising by volume 4 parts of fine grained slag, # inch to dust, 2 parts of coarse foamed slag, ¢ inch to # inch, and 1 part cement is first placed in a vibrating mould, concrete is added before the foamed slag has set and the mould is then vibrated again. Fig. 3 shows a wall plate having a concrete part 11 and a nailable part 10.
Patent GB-854024-A (GB)
Title: Hermetically sealed pump and motor unit
IPC: F04D7/06
Filed: 1958-09-22
Abstract: 854,024. Stuffing-box substitutes; centrifugal pumps. ALLIS-CHALMERS MANUFACTURING CO. Sept. 22, 1958 [Sept. 23, 1957], No. 30259/58. Classes 110 (1) and 122 (5). A hermetically sealed centrifugal pump-andmotor unit for pumping hot liquids such as liquid sodium comprises an electric motor 1 connected to a pump 2 by a shaft 3 extending through an hermetically-sealed pump casing 16 and sealing means disposed between the motor and pump for providing a downward flow of inert gas around the shaft to prevent leakage of liquid vapour therealong. The gas, at a positive pressure, is fed through a pipe 53 into a labyrinth-type seal 4 mounted in an extension of the motor casing 8 and flows through the seal into a bellows 45 from which it flows through another labyrinth seal 5 via a hole 43, into the space above the liquid sodium contained in a sump tank 24; excess gas and liquid vapour passes from this space through a duct 26 for disposal or purification and recirculation. The bellows is sealingly connected to the motor casing 8 and a cover-plate 31 mounted on the sump tank 24 which is hermetically sealed with the pump casing 16. A baffle 33 is provided in the tank 24 having vertical and horizontal baffle-plates 38, 39, 40, 41 which serve to prevent whirling of the liquid and assist in the heatdissipation of the latter. To further prevent heat from the liquid being conducted along the shaft 3 to the motor-spaced openings 44 are provided in a housing 6 thereby permitting circulation of air around the shaft. The pump impeller 11 is guided by a hydrostatic bearing 12, 20 and runs, at its lower end, in a wear-ring 23.
Patent GB-1464508-A (GB)
Title: Process for the manufacture of a perfluoroalkoxypropionyl fluoride
IPC: C07F9/655
Filed: 1975-07-18
Abstract: 1464508 Perfluoroalkoxy propionyl fluoride HOECHST AG 18 July 1975 [20 July 1974] 30265/75 Headings C2C and C2P A perfluoroalkoxy propionyl fluoride of empirical formula C 9 F 16 O 4  having b.pt. of 115-118 C. and IR absorption at 9À7 microns, believed to be of structure is prepared by reacting hexafluoropropene epoxide with a compound of general formula in which R 1 , R 2  and R 3  are each di(C 1-4  alkyl) amino radicals at - 50 to + 10 C. The reaction may be performed in hexafluoropropene using hexamethyl phosphoramide. Difluoro - tris - [dimethylamino]phosphorane is obtained in the above reaction as a byproduct when PO[N(CH 3 ) 2 ] 3  is used as reactant. Perfluoro - 2 - ethoxy - 3,6 - dimethyl - 1,4- dioxan is prepared from the compound of Formula III by saponification and decarboxylation.
Patent GB-249202-A (GB)
Title: Improvements in edge filtration
IPC: B01D39/18
Filed: 1924-12-17
Abstract: 249,202. Shaw, H. S. Hele-, and Pickard, J. A. Dec. 17, 1924. Filtering-media.-Edge. filters are formed of sheets of paper treated with nitrocellulose, acetylcellulose, rubber, chlorinated rubber, celluloid, casein, cellulose esters, natural or synthetic ressin, paraffin, hardened gelatine, asphaltum or formaldehyde condensation products. The sheets may be cut to the required shape before treatment , which may be carried out oy immersion or spray - ing. The edges only of the sheets may be treated, and the treatment may be effected after the sheets have been arranged in packs or piles. Specifications 210,101, 210,376 and 227,890 are referred to.
Patent GB-1395842-A (GB)
Title: Cultivation of yeast
IPC: C12R1/685
Filed: 1973-06-26
Abstract: 1395842 Tonelopsis utilis LACHEMA NARODNI PODNIK 26 June 1973 [26 June 1972] 30412/73 Heading C6F Tonelopsis utilis is grown in a nutrient medium which contains 2.5-7% sugar and substances other than citric acid, produced during the citric acid fermentation of Aspergillus niger. The additive substances may result from citric acid fermentation of molasses by A.niger (e.g. the mycelium and/or waste liquor from the fermentation) and may be included as 40-60% by volume of the nutrient medium. Where the mycelium is used it may be added in the wet state or may be dried, e.g. in air at about 60‹C, before addition, and is preferably added in an amount of 5-15% <SP>M</SP>/V calculated on the basis of a content of 25 wt. per cent dry matter. The nutrient medium may also comprise growth stimulants, including one or more B vitamins.