baber/WOPTO huggingface dataset:
Patent GB-764383-A (GB)
Title: Transistor reactance device
IPC: H03J3/18
Filed: 1955-02-25
Abstract: 764,383. Automatic frequency control. HAZELTINE CORPORATION. Feb. 25, 1955 [March 31, 1954], No. 5730/55. Class 38 (4). [Also in Group XL (c)] In a circuit in which the emitter-base path of a transistor 11, Fig. 1, is biased off, the basecollector and emitter-base reactances, i.e. capacitances being effectively in series across terminals 26, a control voltage 22 is applied in the base-emitter path to vary the magnitude of the capacitances. The control voltage may be the unidirectional voltage of an automatic frequency control system. The control voltage may also vary the mean operating frequency of an amplifier or control its pass band. The control voltage 22 varies the thickness of the layers at the junctions 12, 14 and 13, 14 and it is stated that if the magnitude of the variation is made small and does not exceed one-tenth of the bias source 20 the modulation is linear. Since the transistor operates in the cut-off region the input impedance to source 22 is high. Inductors 21, 23 present a high impedance to R.F. oscillations from the generator 29, capacitor 25 acting to by-pass these oscillations. The bias battery 20 may be arranged in the common emitter-collector lead and earth (Fig. 3, not shown). The transistor may operate at frequencies in excess of those possible for its use in an amplifier or oscillator circuit.
Patent GB-329048-A (GB)
Title: Electrical apparatus and means for protecting the same against transients, surges, and the like
IPC: H01F27/32
Filed: 1929-02-21
Abstract: 329,048. Smith, F. S. Feb. 21, 1929. Protective arrangements. - Electrical apparatus is protected against excess voltage by being connected in shunt with a fast discharge gap, the apparatus and the gap being housed in a casing which, with the gap, is filled with gaseous dielectric under pressure. The fast discharge gap is constructed to avoid corona preceding the breakdown and the gaseous dielectric has a low dielectric time lag. The dielectric may be a single gas such as nitrogen or carbon dioxide or a mixture of gases such as helium and nitrogen in such proportions and at such a density or pressure, for example, sixteen atmospheres, as will give the required insulation characteristic combined with adequate thermal conductivity. The transformer has a primary winding 4 on an insulating cylinder, and a spaced sectionalized high tension secondary winding on a cylindrical insulating support 5. The casing 2 is sealed and filled with the gaseous dielectric under pressure so that the windings have solid and gaseous insulations in series between them. The low tension terminals are housed in a bushing 24 in the base; one end of the secondary is earthed on the casing and the other connected to a terminal 8. A fast discharge gap is constituted by a conducting tube 10 surrounding and in connection with the terminal lead and a conducting bushing 11, welded into the transformer casing, which supports an insulating housing 9 for the terminal. The gaseous dielectric fills this gap and bushing. Breakdown of the gap is designed to occur at a voltage less than that which would harm the apparatus or rupture or overstress the solid dielectric.
Patent GB-165896-A (GB)
Title: Improvements in dop-holders for use in grinding and polishing diamonds and other gems and precious minerals
IPC: B24B9/16
Filed: 1920-02-27
Abstract: 165,896. Davids, W. J. Feb. 27, 1920. Addition to 152,980. Gems, treating.-The holder for cast dops, employed for grinding and polishing diamonds and other gems and precious minerals, described in the parent Specification, is provided with rack- and-pinion mechanism for adjusting the angle of the dop and for locking the dop after adjustment. The holder comprises a body a carrying an angularly-adjustable bracket b, in which is mounted a rotatably adjustable dop-housing c, the connection between the bracket and the body comprising an arcuate dovetail-sectioned rib a<2> on the body and a dovetail groove b<2> in the bracket. On one side of the body a is an arcuate rack g, and meshing with this is a pinion h carried bv a spindle h<1> journaled in the bracket and provided with an operating-head h<2>, In order that the bracket may be automatically looked in adjusted position, the head h<2> takes into a recess b<3> in the bracket, and a spring j is interposed between the head and the end of the recess, the friction between the pinion and the bracket, due to the spring, being sufficient to hold the parts against relative displacement. When the bracket is to be adjusted, the head h<2> is depressed to move the pinion from contact with the bracket and is then rotated.
Patent GB-643715-A (GB)
Title: An improved means for maintaining a workpiece in the operative position relative to a centreless grinding machine
IPC: B24B5/35
Filed: 1947-03-01
Abstract: 643,715. Centreless grinding machines. SCRIVENER, Ltd., A., and SCRIVENER, A. March 1, 1947, No. 5904. [Class 60] An end-thrust stop member a for maintaining a work-piece b in operative position between a grinding wheel d and a control wheel o is mounted in anti-friction bearings e<SP>1</SP> in a sleeve e so that it does not tend to check rotation of the work-piece. The sleeve is adjustable in a carrier f by means of a screw p, and the carrier is reciprocated to push a work-piece from a magazine c into position between the wheels by a hydraulic cylinder which is connected to the carrier by levers j, h on a shaft g<SP>2</SP> and by a lever g pivoted on the shaft. The traverse of the work while in the grinding throat is controlled by a cam-faced slide n as described in Specification 643,774. In the Provisional Specification the stop member is described as being spring-urged towards the work-piece.
Patent GB-325695-A (GB)
Title: Improvements in the manufacture and production of ethylene
IPC: C07C5/09
Filed: 1929-02-22
Abstract: 325,695. Johnson, J. Y., (I. G. Farbenindustrie Akt.-Ges.). Feb. 22, 1929. Ethylene is prepared by passing acetylene together with hydrogen over a catalyst comprising aluminium powder, cerium, or cerium oxide. The catalyst mav be used alone or mixed with other catalytic or inert substances; suitable substances mentioned are active carbon, asbestos, kieselguhr and the like. The reaction is preferably carried out at elevated temperature and at atmospheric pressure, but reduced or elevated pressure can be used. The hydrogen may be present in large excess. In an example, a gas containing 7.2 per cent of acetylene and 92.8 per cent of hydrogen is passed over aluminium powder at 320‹ C.; the reaction gas contains 6.05 per cent of ethylene. Other examples are given in which cerium oxide deposited on asbestos, cerium deposited on a carrier, and a mixture of cerium oxide and aluminium powder are the catalysts' used.
Patent GB-380363-A (GB)
Title: Improvements in water supply systems
IPC: A01K7/02
Filed: 1932-02-29
Abstract: 380,363. Drinking - appliances for animals. LACE & CO., Ltd. and LACE, T. L., 25, Market Place, Wigan. Feb. 29, 1932, No. 5969. [Class 5 (ii).] To provide a reliable supply of water, usually unchilled, for cattle on dairies, farms and like places a supply cistern 5 for the usual nose actuated cattle trough 14 is fed by the overflow from a milk-cooler 2 or other warm water supplying device which is supplied from a main 4. The main 4 is led also to the cistern 5 at a, point near the base and a ball valve 11 arranged to control the inflow so that while the cistern is normally supplied with water that has passed through the cooler 2, yet a minimum head is maintained directly from the main. An overflow pipe 12 can be provided leading to a trough 13. Pipes 7 may be connected to the cistern to supply water for domestic purposes.
Patent GB-1091173-A (GB)
Title: Improvements in or relating to ventilating apparatus
Inventor: FITT PETER GORDON
IPC: F24F7/007
Filed: 1965-02-12
Abstract: 1,091,173. Ventilators. FAIRITT ENGINEERING CO. Ltd. Feb. 9, 1966 [Feb. 12, 1965], No.6088/65. Heading F4V. An air distributer, intended to provide stratified or unstratified air and provided with one inlet 11 and two outlet passages 15 and 16, has valve means comprising a lower ported plate 18 and an upper ported plate 19 movable relative thereto by a handle 20, the arrangement of the ports (Fig. 3) being such that movement to close channel 16 (ports 18b and 19b) causes opening of channel 15 (ports 18a and 19a) and vice versa, and a deflector 17 which causes the air coming through channel 16 to be directed horizontally across the path of air from channel 15. A volume control damper comprising a fixed ported plate 21a and a movable ported plate 216 is provided;
Patent GB-887940-A (GB)
Title: Improvements in or relating to life-rafts and like articles intended to be inflated on water
Inventor: WEST CYRIL STANLEY
IPC: B63C9/02
Filed: 1959-02-23
Abstract: 887,940. Inflatable craft. R. F. D.. CO. Ltd. Feb. 19, 1960 [Feb. 23, 1959], No. 6178/59. Class 113. An inflatable boat, having a buoyancy chamber 10 fitted with an aspirator 12 adapted to be operated by gas under pressure from the cylinder 13, has baffles 15 and 16 formed with apertures 17 and 18 so that during inflation the port of the chamber adjacent the aspirator is inflated in advance of the remaining part and the induced air intake of the aspirator is kept above water level during inflation. The chamber 10 may have only one baffle and the aspirator may be fitted with a short duct on the inside of the chamber to direct incoming air towards the baffle. The boat may have two superposed chambers each having an aspirator and each baffle may have two apertures located towards the side of the chamber opposite to that in which the aspirator is fitted.
Patent GB-592062-A (GB)
Title: Improvements in direct current voltage chambers
IPC: H02M7/62
Filed: 1945-03-14
Abstract: 592,062. Electromagnetic interrupters. PLESSEY CO., Ltd. March 14, 1945, No. 6373. Convention date, April 14, 1944. [Class 38 (v)] [Also in Group XXXV] In a specially compact direct current voltage changer (see Group XXXV) involving a vibratory interrupter 31 which supplies intermittent current to the primary of a transformer 20 and also rectifies the secondary current from the latter, the interrupter and transformer together with condensers 24, 25 are mounted on a metal plate 30 supported within a metal can 32 lined with sponge rubber, the whole having the dimensions of a packet of cigarettes.
Patent GB-413601-A (GB)
Title: Improvements in or relating to clearers for textile yarns
IPC: B65H63/06
Filed: 1934-02-28
Abstract: 413,601. Clearing yarns. STUBBS, Ltd., J., and STUBBS, M. E., Mill Street Works, Ancoats, Manchester. Feb. 28, 1934, No. 6427. [Class 120 (ii).] In a clearer for yarn-winding machines of the kind consisting of two superposed discs between which the yarn passes, the lower disc being apertured for the escape of waste matters, the upper disc 12 is maintained in position on a central stud 7 and the lower disc 11 has a resilient support which rotates with it to throw off any of the waste matters accumulating thereon. As shown the upper disc is loosely mounted on the stud 7 and the lower disc is supported by a spiral spring 9 secured to the disc 11 and bearing on a bevelled collar 8 on the stud ; the stud 7 is fixed in a bracket 5. In modifications the stud may be rotatable with the upper disc fixed thereon or the lower disc and spring may be fixed to the rotatable stud with the upper disc free thereon.
Patent GB-967187-A (GB)
Title: Improvements in or relating to catalysts
IPC: B01J23/96
Filed: 1962-02-20
Abstract: A catalyst, which has become spent from use in the hydrogenation of an anthraquinone working compound in the production of hydrogen peroxide, is regenerated by contacting the spent catalyst with wet steam at temperatures from about 80-200  DEG C. for at least about 4 hours.  The catalyst may be used as a fixed or fluidized bed and may contain one of the metals Pt, Pd, Os, Ir, Ru and Rh.  The wet steam may contain at least 10% water. The catalyst may have as a support alkaline earth carbonates, alumina, carbon, alkaline earths and silica gel.  Examples are given.  Specifications 686,574, 788,340 and U.S.A. Specification 2,692,240 are referred to.
Patent GB-1417320-A (GB)
Title: Sewing machine with automatic thread cutting device
IPC: D05B57/00
Filed: 1973-02-09
Abstract: 1417320 Thread cutters on sewing machines JANOME SEWING MACHINE CO LTD 9 Feb 1973 6565/73 Heading DIG In a sewing machine having a looper 5 driven in synchronism with the needle drive and a thread tensioner 44 a thread cutter 28, 29 is provided which takes the thread below the throat plate of the machine and cuts it by movement of the part 28 relative to the part 29, the thread cutter being operable by control means when the mask needle drive is stopped at a predetermined position and being driven from the main drive of the machine. As shown, links 15, 19 are both pivoted to a link 13 mounted on a rockable shaft 11, the shaft 11 being driven in its rocking motion by means of an eccentric 6 on the main shaft of the machine. When the pivot points 16, 21 of levers 15, 19 are in line the levers rock about this common line but when the pivot point 16 is moved in the direction of the arrow by arm 17 on the cutter control rod 18 it causes the motion transmitted from rooking shaft 11 to be further transmitted by links 22, 23, 25 and 27 to the member 28. The position of control rod 18 is determined by means of the angular position of a cam 90 driven by an electromagnet 50 and the angular position of cam 90 is controlled from the machine treadle by rod 90, lever 94 cable 96 and cam 93. When the thread is being cut the thread from the bobbin is taken up by a pivotable eye 51 driven by an electromagnet 52. A control circuit is provided which compares the pulse provided from a measurement of thread tension from a thread tensioner 44, and the machine speed. Also the position of the treadle as well as positioning the cam 93 operates a switch in the control circuit so that the circuit, when all parts are in their correct position, operates electromagnet 50 to operate the thread cutter. The thread cutter comprises a cranked hook 37 which takes the threads as it moves towards fixed blade 29 so that they are laid across cutting surfaces 36a, 36b and out as they pass the sharpened edge 39 of blade 29. The thread tensioner 44 comprises two discs 62, 63 urged together by spring 60 acting on a cylindrical cover 65. The inside of the cover has a carbon resistor 66 thereon and a wiper 69 having a carbon contact 68 is in contact therewith. Connection is made to the resistor element 66 by a wire 72 and to wiper 68 by a wire 71 and spring 70. As the thread tension, determined by the spring 60 varies so the resistance between the free ends of wires 71, 72 varies to give an electrical measurement of the thread tension.
Patent GB-491653-A (GB)
Title: Process for the separation of the anti-rachitically acting components of irradiated 7-dehydrocholesterol
IPC: C07C401/00
Filed: 1937-03-06
Abstract: The antirachitically active component is separated from irradiated 7-dehydrocholesterol by steps comprising esterification of the irradiated product, separating the mixed esters by differential solution, saponifying the portion containing the active ingredient and at any stage, i.e. before esterification, in the esterified form or after saponification, effecting a purification by the method of chromatographic adsorption.  The crude irradiation products may be first purified by treatment with maleic anhydride or its homologues (e.g. citraconic anhydride) to produce the ester which is separated and saponified.  Suitable esterifying groups for combination with the vitamin, (referred to as vitamin D3) in order to form relatively sparingly soluble esters are allophanic acid (the ester is prepared by leading cyanic acid gas into the solution of the material) and 3-5-dinitrobenzoic acid or its 4-methyl derivative.  Detailed descriptions of preparation of the vitamin are described in an example and in the schedule to a sample filed under Sect. 2 (5).  The Specification as open to inspection under Sect. 91 includes examples and the schedule to a sample in which the step of chromatographic adsorption is not included.  This subject-matter does not appear in the Specification as accepted.
Patent GB-487441-A (GB)
Title: Improvements in or relating to teleprinter exchange systems
IPC: H04L12/00
Filed: 1937-03-06
Abstract: 487,441. Telegraph exchange systems. TOWLER, E. E. (Siemens & Halske Akt.-Ges.) March 6, 1937, No. 6661. [Class 40 (iii)] A subscriber's line is provided with means in the line or preselector circuit for forcing release on the receipt of a release signal from a called line, even if the calling loop remains closed. In the system shown, relay R(i) operates over the loop on a call being made and closes an interrupter circuit for the preselector magnet D. On the operation of test relay T, relay U operates and locks dependent on relay R, and battery sent back over the b-wire energizes relay L which connects repeating relay B across the loop. Relay R remains operated over winding (i) and if the calling party sends the release signal, winding (ii) of R is operated by the release of B so that R releases releasing T and restoring the preselector to normal. If the called party sends a release signal, relay L releases closing a short-circuit for winding (i) of R and disconnecting winding (ii) so that R releases irrespective of the condition of the calling loop and releases relay T and the connection. In a modification, for a four-wire toll-subscriber's line, the release of relay L with U energized when the called party releases reverses the battery connection to one winding of relay R to effect its release.
Patent GB-180750-A (GB)
Title: Improvements in and relating to strops for razors and the like
IPC: B24D15/08
Filed: 1921-02-28
Abstract: 180,750. Douglas, C. D. Feb. 28, 1921. Strops; supplying abrading-materials.-The leather of a strop for razors &c. is treated with graphite or graphite and soft metal. The leather is preferably first dressed with oil or grease, and is then rubbed or sprinkled with graphite or graphite and soft metal. A device for rubbing the strop comprises a wooden handle b to which is secured a piece of lead or other soft metal a with which graphite is incorporated.
Patent GB-684817-A (GB)
Title: Improvements in or relating to rotary electric welding transformers
IPC: B23K11/24
Filed: 1951-03-22
Abstract: 684,817. Transformers. HUNTER, T. M. March 22, 1951, No. 6877/61. Class 38 (ii). A rotary electric welding transformer having a supporting shaft comprises a secondary winding in two cylindrical concentrically-arranged parts, the inner part being directly carried on the shaft, both parts having closely-spaced extensions at one end on each of which is carried a circular welding electrode, the parts at the end opposite the electrodes being more widely spaced so as to receive a unitary primary winding with its core, the widely-spaced parts of the secondary winding being closed by a removable plate of electrically conducting material so that the primary winding structure can be removed as a unit without disturbing the secondary winding and the electrodes. The secondary winding comprises two cylindrical members 4, 5, closed by an end-plate 33, disc electrodes 12, 21 being mounted on the projections 7, 18, respectively, thereof. The provision of the end-plate 33 allows a primary winding P to be assembled between the two parts 4, 5 of the secondary winding as a unitary structure. Current is fed to the primary winding by way of slip-rings 46, 47, and connecting-rods 50, 51. Cooling liquid is supplied by means of a pipe 62 and flows around the assembly via pipes 73, 65, space 66, aperture 67, around the primary winding P, out from the primary winding by means of an aperture 68 into an annular space 69; along another annular space between the parts 7, 18 of the secondary winding and into the space 8 by means of aperture 70, thence into a large space 71 between the secondary winding and the shaft 1. The fluid is then led from the assembly by way of aperture 72, and pipes 64, 76. The cooling liquid is preferably oil. The whole assembly is mounted to rotate in bearing members 2, 3. In another embodiment water is used for a coolant, but, in order to prevent condensation in the primary windings, the water is led only over the external surfaces of the secondary winding, a motor driven blower being provided to circulate dry air over the primary winding. U.S.A. Specification 2,241,015 is referred to.
Patent GB-895623-A (GB)
Title: Improvements in or relating to engine brakes for internal combustion engines
IPC: F02D9/06
Filed: 1961-02-24
Abstract: 895,623. Exhaust brakes. ZAHNRADFABRIK FRIEDRICHSHAFEN A.G. Feb. 24, 1961 [Feb. 26, 1960], No. 6890/61. Addition to 764,946. Class 7(6). [Also in Group XXIX] The exhaust brake valve of the parent Specification has a sealing means 6 on the trunnion associated with the actuating lever 8, the sealing means being interposed between part-spherical surfaces 5, 4, on a collar 2 of the trunnion and a bearing bush 3. The sealing means may comprise a single washer or a pair of washers 6, 7.
Patent GB-995301-A (GB)
Title: Apparatus for forming tubular bellows
Inventor: BYRNE MAURICE FREDERICK WILLIA
IPC: B21D26/02
Filed: 1963-02-21
Abstract: 995,301. Stamping. BRITISH THERMOSTAT CO. Ltd. May 21, 1964 [Feb. 21, 1963], No. 7016/63. Heading B3Q. Apparatus for forming tubular bellows comprises two sets of die plates 1, each forming half of a complete die and co-operating respectively with fixed and movable stepped locating members 10, 12, whereby they may be moved to and held in their correct initial spacing. The stationary locating members 12 extend between lateral members 7, 8, the movable members 10 extending between lateral members 4, 6 which support bars 2 passing through holes, Fig. 4 (not shown), in the plates 1. Movement of the frame 2, 4, 6 by a pneumatic cylinder 9 and rod 5 clamps the plates 1 between members 4, 8, Fig. 3. Each plate 1 has adjacent pairs of apertures corresponding to particular steps on the members 10, 12 so that when the frame is withdrawn, the plates are pushed by the steps on the members 10 until all the plates are stopped simultaneously in spaced relation, Fig. 2, by contact with corresponding steps on the stationary members 12. With the plates in this setting, a plain or preformed tube is placed between the upper and lower die-halves and hydraulic pressure applied within the tube as the cylinder 9 is operated to close the spacing between the plates. The top die-half swings away from the lower half under the return stroke of the ram 5. The members 10, 12 need not be plates, and more or less than four may be provided.
Patent GB-701924-A (GB)
Title: Improvements relating to machine tools
IPC: B23Q1/40
Filed: 1951-03-27
Abstract: 701,924. Rectilinear-motion bearings. JONES & SHIPMAN, Ltd., A. A., and HOULDSWORTH, J. Feb. 21, 1952 [March 27, 1951], No. 7069/51. Class 12(1) In a machine tool comprising a carriage 1 movable on ball bearings 7 disposed in a slideway formed with inclined sides in a soft workable material, such as cast iron, which determine the linear accuracy of the slideway, the sides are lined with removable harder material 11, such as hardened steel, of a uniform thickness so that the linear accuracy of the sides is reproduced at the working surfaces. The strips 11 are secured to the sides by screws 13. The balls 7 are loosely arranged in apertures 15 in a slidable plate 16 arranged between the carriage 1 and bed 2. Spaced lateral pins 17 on the plate 16 are adapted to be engaged by a pin 18 depending from the carriage 1 so that the balls will slide instead of roll during the initial positioning of the carriage. Along its opposite side the carriage 1 has secured thereto a plate 8 which runs over the links of a roller chain 9 disposed longitudinally of the bed and supported by a member 10 secured to the bed. The invention is applied to a grinding machine.