baber/WOPTO huggingface dataset:
Patent GB-212342-A (GB)
Title: Improvements in and relating to electric switches
IPC: H02B11/04
Filed: 1922-12-23
Abstract: 212,342. Trencham, H., and British Thomson-Houston Co., Ltd. Dec. 23, 1922. Sliding switch-carriage arrangements.- In truck-type and similar switchgear used in explosive atmospheres, in order to avoid explosions which may be produced by the static charge which may remain on the contacts when, after the circuit-breaker has been opened, the plug isolating contacts on the sliding carriage are withdrawn from the fixed socket contacts, a closed chamber is formed within the socket wherein any spark is disrupted before the plug finally leaves the socket.. In the arrangement shown in Fig. 1, a small socket opening is formed within the contact 12 which is of the same diameter as the through hole in the insulating material 16. The plug has a reduced end 18 which fits into the contact socket while the larger diameter 19 of the plug closely fits the hole in the insulation. The larger diameter may be formed by a sleeve round a portion of the plug. In a modification shown in Fig. 3, a plug 18 of uniform diameter fits within a socket of uniform diameter throughout made up of insulating material 16 and a conducting socket 12 embedded therein. A groove 20 cut in the material 16 traps small bits of metal which may be abraded.
Patent GB-908417-A (GB)
Title: Anti-rotation means for toggle locks
Inventor: CHACE RICHARD ARTHUR
IPC: F15B15/26
Filed: 1960-10-13
Abstract: 908,417. Hydraulic apparatus. WESTERN HYDRAULIC & SERVICE CO. Inc. Oct. 13, 1960, No. 35080/60. Class 69 (2). An actuator for operating an aircraft undercarriage comprises a guiding element 1 having a bevelled surface 10, a guided element 2 on which is mounted dogs 3, a toggle device 4 operatively engaged with the dogs, means 42 acting on the toggle device to urge the dogs into locking engagement with the surface 10, means to urge the toggle device against the means 42 to retract the toggle device and permit disengaging of the drop from the surface, and means 40 interengaged between the toggle device and the guided element to prevent relative rotation therebetween about an axis parallel to the direction of movement between the guided and guiding elements when the dogs are in the retracted position. The guiding element consists of a cylinder 1 receiving the guided element which is in the form of a piston 2. The cylinder is formed at each end with a bevelled surface 10 for engagement with the dogs 3 radially movable in the piston 2. Each side of the piston is formed with a recess 20 receiving a plunger 41 which is urged outwardly by a spring 42 so that the toggles mounted on a pin 40 in the plunger act to urge the dogs radially outwards into engagement with the associated surface 10 when coincident therewith. The pin 40 extends into a groove 22 in the recess 20 to prevent relative rotation between the toggles and the dogs about the axis of the actuator and consequent wear therebetween. The dogs may actuate electric switches 5, which may constitute part of the control mechanism for the actuator, when they are in their locking position and are formed with stops 31 to limit the outward movement of the toggles and plungers. The plungers may be moved against the springs 42 to release the dogs by fluid pressure supplied through ports 11 to move the piston 2 relative to the cylinder.. The final movement of the piston may be damped by fluid passing through a needle valve 13, fluid then being supplied to the cylinder through a check valve 14. In an alternative embodiment, the dogs move radially inwards to effect locking between the guided and guiding elements. Specifications 763,955 and 763,956 are referred to.
Patent GB-320559-A (GB)
Title: An improved combination garment of the corselet variety
IPC: A41C1/06
Filed: 1928-11-29
Abstract: 320,559. Brown, Ltd., W., and Brown, W. B. Nov. 29, 1928. Undergarments ; brassiÞres ; c o r s e t substitutes.-A wrap, round corselet combined with a brassiÞre comprises a front section consisting of a brassiÞre part a<1> seamed to the corselet part, and a rear section in which the brassiÞre prat a<111> is free of the corselet part b. The brassiere is fastened at the back and provided thereat with an elastic section g. The corselet part is fastened at the side and is provided with side insertions of elastic b<1>, b<11>. Shoulder straps f connect the top front corners e of the brassiÞre with the back section of the corselet part. Stiffeners b<111>may be employed in this latter part and also in the front part, where they extend into the brassiÞre section.
Patent GB-318854-A (GB)
Title: Improvements in fuel pump with lost-motion lever
IPC: F02M59/14
Filed: 1928-11-29
Abstract: 318,854. A. C. Spark Plug Co., (Assignees of Babitch, A. M.). Sept. 10, 1928, [Convention date]. Cam-, lever-, and spring-actuated pumps; diaphragm pumps. - A fuel pump comprises a pump chamber 15 in which a diaphragm &c. 18 is reciprocated by a spring 27 on the delivery stroke and by two levers 29, 34, and a cam &c. 13 driven by the engine. The lever 34 is pivoted at 35 on the lever 29, and a spring 36 - - 39 holds it against the cam. The spring 27 is stronger than the spring 36, so that normally the two levers 34, 29 rock as a unit on the pivot 30 and effect the suction stroke. As the pressure in the chamber 15 increases, the stroke diminishes and the two levers 29, 34 are operated with lost motion between them. In the limit, the lever 29 does not move and the stroke is reduced to. zero. Specification 274,421 is referred to.
Patent GB-391531-A (GB)
Title: An arrangement for phase regulation in the case of television receiving apparatus
IPC: H04N5/067
Filed: 1931-12-21
Abstract: 391,531. Television. ARDENNE, M. VON, 19, Jungfernstieg, Lichterfelde-Ost, Berlin. Dec. 21, 1931, No. 35265. Convention date, Dec. 22, 1930. [Class 40 (iii).] In television, the image frequency is derived from the line frequency or vice versa and means are provided for phase and amplitude regulation of one or both frequencies. The received line (or image) frequency after separation from the picture signals is taken from a potentiometer 2 to the grid of a valve 1, whose output circuit includes a transformer 4. The secondary winding 6 and the variable condenser 7 are tuned to the image frequency which is applied to the deflecting plates 9 of the cathode-ray tube. A frequency multiplying device included in the leads 16 supplies the line frequency to deflecting plates 15 over a transformer 12 whose secondary 13 is tuned by a condenser 14. Adjustment of the phases of the deflecting frequencies is obtained by adjustment of the condensers 7, 14 ; the absolute amplitudes are varied by the potentiometer 2, while the relative amplitude is adjusted by a variable resistance 5. A resistance 8 damps the image frequency. The derived frequency may be of saw tooth wave form. According to the Specification as open to inspection under Sect. 91, both line and image frequencies may be transmitted. This subjectmatter does not appear in the Specification as accepted.
Patent GB-774287-A (GB)
Title: Improvements in vacuum casting
Inventor: TURNBULL JOHN STRATTON
IPC: B22D18/06
Filed: 1953-12-18
Abstract: 774,287. Casting-processes; moulds. METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. March 15, 1955 [Dec. 18, 1953], No. 35332/53. Class 83 (1). In a vacuum casting-process, a shell-mould of permeable ceramic material is positioned within an evacuable container, and a thin diaphragm is positioned to extend across a pouring-throat for the entry of the melt into the mould, the diaphragm supporting, within the throat, a volume of said melt and being of a material which will be melted by the heat of said melt and permit rapid entry of the melt into the mould, while preventing entry of air into the mould during evacuation thereof. A diaphragm 3, e.g. of stainless steel, is provided in the main runner 2 of a permeable ceramic mould made by the lost-wax process disclosed in Specification 722,816, which is referred to. The mould is backed with refractory or metal shot 13 in a steel canister 7 and evacuated through a pipe 14. In a modification, Fig. 3, the diaphragm is inserted in a separate pouring- cone 20 which is sealed into the top-plate of the canister 7. The cone is preferably made by the lost-wax process. To prevent any tendency of the air which follows the melt through the cone to blow the metal out of the mould-cavity, coarse refractory particles are placed on top of the melt before the diaphragm melts; and after the metal has passed through the cone, the particles tend to block the neck and air diffuses slowly therethrough instead of passing through as a blast. The diaphragm is usually of a metal similar to that being cast.
Patent GB-456301-A (GB)
Title: Improvements in or relating to thermionic amplifiers for electromagnetic waves
IPC: H01J25/00
Filed: 1935-12-20
Abstract: 456,301. Repeating- arrangements. STANDARD TELEPHONES & CABLES, Ltd., 63, Aldwych, London.-(Assignees of Potter, R. K.) Dec. 20, 1935, No. 35345. Convention date, Jan. 22. [Class 40 (iv)] [See also Group XL] A thermionic amplifier tube for electromagnetic waves comprises a heated cathode, a grid and an anode all of greater length than the longest wave length to be amplified, and all arranged with their lengths lying in the direction of propagation of the waves to be amplified, an input circuit being connected at one end of the tube to the cathode and one of the other electrodes, and an output circuit at the other end of the tube to a different pair of electrodes. In a communication system comprising such a tube the input and output circuits are concentric conductor pairs. In the form shown in Fig. 1, a cylindrical positive anode 13 and negative grid 15 are arranged concentrically around a filamentary cathode 18, the evacuated space being completed by glass end walls 14, 14<1>. The input circuit is a pair of concentric conductors 11, 12, the inner one being connected to the cathode and the outer one capacitatively coupled to the grid through condenser plates 16, 17. The output circuit 11<1>, 12<1> is capacitatively coupled to the grid and anode through condenser plates 16<1>, 19 and 28, 29 respectively, conical extensions 30, 31 being provided to maintain a uniform characteristic impedance. The far ends of the grid and anode are provided with correct terminating impedances comprising discs 27, 27<1> of resistance material mounted within condenser plates 26, 26<1> coupled to anode and grid respectively. As shown diagrammatically in Fig. 5, the incoming wave travels along the grid and is absorbed in impedance 27<1>. Each positive peak is accompanied by a stream of electrons which travels across to the anode and induces in it amplified waves, of which the one travelling to the right is built up, while that travelling to the left suffers interference and is finally absorbed in impedance 27. The amplified wave passes along the output conductors 11<1>, 121. In a modification, Fig. 6 (not shown), the tube is operated with the grid positive and the anode negative, the input wave being applied between anode and cathode, and an amplified wave being induced between grid and cathode.
Patent GB-1377055-A (GB)
Title: Manufacture of blue bricks
IPC: C04B33/32
Filed: 1973-07-25
Abstract: 1377055 Bricks WILNECOTE BRICK CO Ltd 25 July 1973 35360/73 Addition to 1308937 Heading C1J The process of making blue bricks as in Specification 1,308,937 is changed to a non continuous one.
Patent GB-321574-A (GB)
Title: Improvements in variable speed gear
IPC: F16H29/20
Filed: 1928-11-30
Abstract: 321,574. Gee, W. J. Nov. 30, 1928. No Patent granted (Sealing fee not paid). Variable - speed gearing.-In variablespeed gearing of the type described in Specifications 115,857, 130,174, 245,250 and 260,065 in which the speed changes are effected by dividing one of the elements i n t o longitudinal slidable sections, and allowing slip, the control is effected by means of an adjustable flat guide carrying a non-circular pathway. The sliding sections 4 carry radial pillars 10 on which are rotatably and slidably mounted balls 12 which run in the non- circular ball-race 6, 6 carried in a ring 7 pivotally carried at 8. The pathway 6, 6 is shaped to give uniform axial movement of the sections during their period of engagement.
Patent GB-1500595-A (GB)
Title: Fuel feed control apparatus and system
IPC: F02D3/00
Filed: 1975-08-27
Abstract: 1500595 Fuel injection control systems REPCO RESEARCH PTY Ltd 27 Aug 1975 [28 Aug 1974 (2)] 35401/75 Heading F1B In a fuel injector control system, a control element 35, 36 is arranged to be angularly displaced to intrude into an air duct 27 so as to cause the air-flow monitor to provide a range of richer mixture signals, the element providing an adjustable stop to determine the monitor position corresponding to minimum air-flow in the duct. Displacement of the element is primarily controlled by a thermal element responding to engine exhaust temperature, in the form of a bi-metal spring 37. The element may adjust the slow running position of throttle valve 47 by means of a linkage Fig. 3, (not shown). The element may further be operated in response to maximum throttle valve open position by means of a striker 48 and arm 49 Fig. 9 (not shown), or by means of a yieldable coupling, comprising a leaking piston 61 in a fluid containing cylinder 58 in a throttle/ control-element linkage 46, 57, 65, 48, to provide an acceleration pump effect for rapid throttle valve opening. The fuel injection monitoring system is known, Specification 425990, and comprises, an air monitor Fig. 2 for example a piston arrangement 14 which raises or lowers a carrier 21 in a switching section 15, the carrier having a source and detector 18, 19, relative to a contoured slot 17 formed in a rotating cup 16, the duration of the electric signal being processed to operate the injector for the indicated time period. An alternative arrangement has a remote switching section employing rotating disks and a radially moving carrier Fig. 11 (not shown). Depending on the type of system, the control element may comprise separate blades 35 or a continuous blade extending across the duct. The duct 4 is mounted between the air cleaner 5 and the inlet manifold 6 Fig. 18 (not shown).
Patent GB-354634-A (GB)
Abstract: 354,634. Door-key labelling attachments. KLOTZ, W., 64, Sch³tzenstrasse. D³sseldorf, Germany. Oct. 30, 1930, No. 32686. [Class 73.] A door-key attachment is made of, or covered with, a resilient material, such as rubber, the surface of which may be marked with the number of the room &c. The core 7 may consist of clay, sponge, rubber, wood, &c.
Patent GB-444916-A (GB)
Title: Improvements relating to carbonising chambers and the like
IPC: C10B29/02
Filed: 1934-12-10
Abstract: 444,916. Retort furnaces. GAS CHAMBERS & COKE OVENS, Ltd., LYMN, A. H., and KEMP, A. V., Artillery House, Artillery Row, Westminster. Dec. 10, 1934, No. 35482. [Class 51 (ii)] , In a vertical retort setting in which the adjacent walls e, f of two contiguous retort chambers a, b are tied by horizontal tiles g which extend from the inner faces of the walls e, f across the intervening heating-flue space o, the tiles are formed with shoulders l which cover the joints at the top and bottom of the tiles and one or more courses m, of these tiles are carried directly on the metal frameworks d at the base of the setting to support the bottom brickwork courses n. The undersides of the tiles g and the inner faces of the wall bricks e, f are hollowed out as shown at p, q, Fig. 2, in order to increase the cross-sectional area of the horizontal heating flues o. To provide communication between adjacent flues o, a space r is left in each horizontal row of tiles g, the wall bricks s at this point having projections t which cover the joints in the same manner as the shoulders l.
Patent GB-1278349-A (GB)
Title: Solid state electronic device using quaternary compound semiconductor material consisting of galium, indium, phosphorus and arsenic
IPC: H01L47/00
Filed: 1970-07-22
Abstract: 1278349 Semi-conductor device HITACHI Ltd 22 July 1970 [23 July 1969] 35545/70 Heading H1K [Also in Division C4] A solid state electronic device comprises a single crystal wafer made of a quaternary compound semi-conductor material consisting of indium, gallium, phosphorus and arsenic, ohmic contacts being provided in contact with opposite surfaces of the wafer. The compound is of composition Ga x In 1-x P y As 1-y  where 0<x<1, 0<y<1, y<3À24-2À8x. The crystal can include a PN junction and in various embodiments may be biased to cause it to emit radiation in the visible or infra-red wavelength range, or function as a microwave frequency converter, or function as a parametric amplifier. It may also be used as a varactor diode. Such a crystal without a PN junction may be used as a Gunn diode. The crystal may be grown epitaxially from the vapour phase or from the liquid phase in a reactor tube, impurities being added at this stage, and after the provision of electrodes the wafer is etched to mesa configuration.
Patent GB-491638-A (GB)
Title: Manufacture of new carbonic acid derivatives
IPC: C07J75/00
Filed: 1937-12-23
Abstract: Saturated or unsaturated ketones of the androstane series are converted into carbonic acid derivatives by reaction with a reactive carbonic acid derivative, that is to say, with a carbonic acid halide, a halogen carbonic acid ester, a urea halide or an isocyanate.  In the halogen carbonic acid esters so produced, the halogen may be exchanged for the residue of a compound having a hydroxyl group (an alcohol or a phenol) or an amino group (ammonia or a primary or a secondary amine).  In examples: (1) D 4-androstene-3-one-17-ol is treated in phosgene solution to give the corresponding D 4-chlorocarbonic acid ester.  A similar reaction may be carried out with transdehydroandrosterone to give the corresponding D 5-ester; (2) the D 4-ester formed above is treated with methanol in the presence of pyridine to give D 4-androstene-3-one-17-ol-methyl carbonate.  By using the appropriate alcohol the ethyl-, n-propyl-, phenyl-, or benzyl-carbonate may be produced; (3) the D 4-ester formed in example (1) is treated as described in example (2) with b -diethyl-amino-ethanol in benzene to give D 4-androstene-3-one-17-ol b -diethylaminoethyl carbonate; (4) D 4-ester produced in example (1) is treated with ammonia in benzene solution to give D 4-androstene -3-one-17-ol-carbamate.  If n-propylamine is used instead of ammonia, D 4-androstene-3-one-17-ol-N-n-propylcarbonate is produced.  Similar reaction can be carried out with the D 5-ester produced in example (1); (5) testosterone is treated with chloro-carbonic acid ethyl ester as described in example 2 to give D 4-androstene-3-one-17-ol-ethylcarbonate. By using the appropriate alcohol the methyl-, phenyl-, or benzyl carbonate may be prepared. In a similar manner the corresponding derivatives of androstane-17-one-3-ol, or androstane-3-one-17-ol may also be prepared.  Specifications 463,163 and 465,331 are referred to.
Patent GB-847682-A (GB)
Title: Lathe chucks
Inventor: DIXON REGINALD JOHN
IPC: B23B31/40
Filed: 1957-11-15
Abstract: 847,682. Chucks. WICKMAN Ltd. Nov. 3, 1958 [Nov. 15, 1957], No. 35741/57. Class 83 (3). A lathe-chuck for gripping a hollow workpiece comprises a body for securing to the lathespindle, a hollow nosepiece extending through the body and carrying a pair of oppositelydisposed jaws at its forward end which are actuated by an axially-slidable spindle, and a second pair of jaws at right-angles to the first jaws actuated by an axially-slidable sleeve on the spindle. A body 10, Fig. 1, is secured to a lathe spindle 11 and carries a hollow nose-piece 12 having jaws 15 mounted in guides 14 and actuated by a spindle 18. Jaws 17, Fig. 2, move radially in grooves 16 and are actuated by a sleeve 21. The work 13 is placed on the jaws, and the spindle 18 is moved to the right until a collar 26 contacts a collar 23, and further movement compresses a spring 24 which moves the sleeve 21, thus expanding the jaws 17 to grip the rear end of the work. Continued movement of the spindle 18 expands the jaws 15 to grip the forward end of the work. By this means the greatest gripping-force is exerted on the strongest part of the work by the jaws 15, as the force exerted by the jaws 17 is governed by the rate of the spring 24. In a modification, the sleeve 21 may be actuated by separate means, such means being co-ordinated with the movements of the spindle 18 to ensure that the jaws 17 grip the work before the jaws 15. A chuck is described wherein the jaws are secured to resilient cantilever arms attached to the body, and are sprung into and out of engagement with the work by a spindle and sleeve, as described above. Specification 145,814 is referred to.
Patent GB-1010546-A (GB)
Title: Improvements in or relating to travelling wave tube arrangements
Inventor: CHALK GRAEME OLIVER
IPC: H01J23/06
Filed: 1963-09-11
Abstract: 1,010,546. Travelling wave tubes. ENGLISH ELECTRIC VALVE CO. Ltd. July 24, 1964 [Sept. 11, 1963], No. 35850/63. Heading HID. [Also in Division H3] The first grid G1 of a travelling wave tube is fed from the slider of a potentiometer VG11 which is connected between the cathode and the second grid G2. Alternatively, if the first grid requires the higher potential, the potentiometer is connected between this and the cathode and the second grid supplied from the slider. The arrangement enables the potentials of both grids to be varied to obtain the minimum noise level, while maintaining the ratio constant, which is also a requirement for low noise: the potentiometer may be encapsulated with the tube and comprise a factory adjustment.
Patent GB-484827-A (GB)
Title: Improvements in or relating to portable fastening devices for securing drawers and doors and for like uses
IPC: E05C19/18
Filed: 1936-12-31
Abstract: 484,827. Portable fastenings and locks. THRELFALL, A. P. Dec. 31, 1936, No. 35858. [Class 44] A portable device for securing drawers, doors, &c. comprises a wedge placed within the drawer and pulled into the space between the drawer 12 and its surround 13 by locking means external to the drawer. As shown, the wedge 11 which may be serrated, is secured to the end of a metal tape 14 which can be wound on to a drum 19, mounted in a casing 17, by worm gearing 23 operated by a removable key 27. In use, the wedge is placed within the drawer &c. and the key is operated to pull the wedge into tight engagement, the casing 17 bearing against the front of the drawer &c. The back of the casing may be flat, as shown, or recessed to accommodate moulding, &c. The wedge may be solid or formed by bending a suitably shaped sheet metal blank. A modification is described in which the tape is perforated for engagement by toothed rollers between which it is drawn. Lock means of known type may be incorporated, a barrel lock, for example, being combined with the worm so that it can be rotated only by the appropriate key. According to the Provisional Specification the strip may be wound on a spindle provided with ratchet wheel and pawl releasable by key.