baber/WOPTO huggingface dataset:
Patent GB-916146-A (GB)
Title: Motor-generator power supply systems
IPC: H02P9/26
Filed: 1959-05-21
Abstract: 916,146. Automatic voltage control systems; exciting dynamos. WILKINS, F. V. May 21, 1959, No. 17339/59. Classes 35 and 38 (4). The operating range of a variable voltage D.C generator is extended by providing an auxiliary source of field excitation opposing the main source so that the residual magnetism can be partially neutralized when the main source is reduced. The output voltage of the generator 11 is compared with an adjustable reference voltage tapped off a potential divider 22 and the resultant error signal is amplified by a cathodecoupled pair of triodes 64, 84 to provide a D.C control bias for a thyratron 32 which energizes the generator field 36 from an A.C. source AB. The thyratron bias also has a phase-shifted A.C. component derived from one winding 140 on a transformer 120. The response of the amplifier to high-frequency components is reduced by the resistance/capacitor network 60, 106 at the input, and the capacitor 108 shunting the output. The transformer 120 also supplies a voltage-doubling rectifier 128 which supplies the amplifier and which also provides the reference voltage via cascaded neon tubes 134, 138. When the thyratron 32 is cut-off, a capacitor 114 is charged by a rectifier 110, and discharges through the field winding 36 so as to partially neutralize the residual magnetism. Specification 831,274 is referred to.
Patent GB-1411036-A (GB)
Title: Unstable ring laser resonators
IPC: H01S3/083
Filed: 1973-04-11
Abstract: 1411036 Lasers UNITED AIRCRAFT CORP 11 April 1973 [8 May 1972] 17435/73 Heading H1C A coherent output beam of annular crosssection is obtained from an unstable resonator having a collimation portion including the active medium, and a magnification portion in which beam enlargement is produced by confocal curved mirrors, the unstable property of the resonator being the tendency for all internal geometric rays to walk out rather than be folded back for containment within the resonator. As shown in Fig. 1, the magnification portion 15 is formed by non-parallel convex and concave mirrors 12, 14 having respective radii of curvature from points A, B such that these points would be coincident at E if the mirrors were parallel. The collimation portion 17 containing the active medium 18 is formed between these mirrors by a plane mirror 16 and provides an annular output beam since the diameter of the convex mirror D 2  is less than the diameter D 0  of the collimated beam. In an alternative arrangement, Fig. 2, the collimation portion 17A is formed by plane mirrors 16A and contains two active media 18A which may be carbon dioxide, the annular output beam being obtained by reflection from an inclined apertured mirror 20. Unidirectional propagation in the resonator of the generated emission may be obtained by the use of a mirror 24, a flowing active medium, or the tendency for the magnified beam in one direction to suppress the diminished beam in the other direction which is explained with reference to Fig. 4 (not shown). In a modification, Fig. 3, the collimated beam 22B is reflected by mirrors 16B along a zig-zag path through a gaseous active medium in an enclosure 18B. Both curved mirrors are concave in the Fig. 5 arrangement.
Patent GB-666919-A (GB)
Title: Improvements in or relating to methods and apparatus for opening cotton and like fibrous material
IPC: D01G9/00
Filed: 1949-07-04
Abstract: 666,919. Opening cotton &c. PLATT BROS. & CO., Ltd., and SZALOKI, Z. June 13, 1950 [July 4, 1949], No. 17603/49. Class 120 (i) Apparatus for opening cotton and like fibrous material comprises a plurality of revolving beaters, having vertical or nearly vertical axes, enclosed in a common casing and cooperating with a common grid surrounding the beaters, the beaters being arranged so that their blades co-operate in opening the material by the a l t e r n a t e impingement thereof upon masses -of cohering fibres. As shown, the opener comprises two beaters, with relatively inclined shafts 8, 9, surrounded by a common grid 16 in an outer casing 1, and independently driven in the same direction by motors 13. The axial setting of the blades 11 of one beater is staggered in relation to that of the blades of the other beater. The footstep bearing 19 of each beater shaft can be raised or lowered for regulating the distance between the blade tips and the grid bars or for varying the setting of the blades of one beater relative to those of the other. Material to be treated enters the grid through a pneumatic trunk at 17; the air stream passes upwardly through the casing and, owing to the staggering of the blades, the material is treated by the blades of the two beaters alternately, and is discharged vertically through a duct 18. The material may be fed to the base of both beaters, and may be discharged horizontally, the beaters in this latter case being rotated in opposite directions. More than two beaters may be used.
Patent GB-795627-A (GB)
Title: Improvements in or relating to storage tubes
IPC: H01J31/60
Filed: 1956-06-07
Abstract: 795,627. Cathode-ray storage tubes. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. June 7, 1956 [June 16, 1955], No. 17643/56. Class 39(1). A storage tube comprises at least a target, an electron gun projecting an electron beam on to the target and focusing means for controlling the angular resolution of the beam selectively to cause this beam to produce on the target a fine reading spot and a wider area erasing spot. An evacuated envelope 1 contains an electron gun having a cathode 3, a Wehnelt cylinder 2 and also in succession a first accelerating anode 4, three focusing cylindrical electrodes 6, 8 and 7, a second accelerating anode 5 and two pairs of deflection plates 14, 15 and 16, 17. A switch 9 having two contacts 91 and 92 enables two different voltages to be applied to the electrode 8. Electrodes 6 and 7 are connected to contact 91. When the electrode 8 is connected to contact 91 the spot on the storage target 11 is very fine (full lines). When the electrode 8 is connected to contact 92 and is at a lower voltage than electrodes 6 and 7 a wider spot of the same intensity is obtained on the target (dotted lines). This wider spot enables residual charges left on the screen 11 after reading, to be erased more quickly than with a fine spot.
Patent GB-545966-A (GB)
Title: Improvements in mountings for dynamo-electric machines
IPC: F16H7/14
Filed: 1940-12-13
Abstract: 545,966. Dynamo-electric machines; belt-tensioning arrangements. BRITISH THOMSONHOUSTON CO., Ltd. Dec. 13, 1940, No. 17665. Convention date, Dec. 15, 1939. [Class 35] [Also in Group XXIV]  Automatic adjustment of belt tension in a dynamo-electric machine is effected by pivotally mounting the machine on arms 20, 21, 22 pivotally attached to a base 16 and biased by a spring or torsion bolt 27 so that the machine is initially urged into the belt loop, the arrangement being such that under varying tension of the belt the machine pivots about an axis shiftable along a path lying between the axis of the machine and the tight side of the belt. In a modification, Figs. 3 and 4 (not shown) the machine is supported by curved pivotal arms pivotally attached to the machine at points lying above the machine axis. Specification 442,904 is referred to. Reference has been directed by the Comptroller to Specification 450,753, [Group XXIV].
Patent GB-1098731-A (GB)
Title: Improvements in or relating to greenhouses and like buildings
Inventor: GARTSIDE JOSEPH HENRY
IPC: E04D3/08
Filed: 1963-05-04
Abstract: 1,098,731. Greenhouses; glazing bars. CLEAR SPAN Ltd. July 10, 1964 [May 4, 1963], No. 17714/63. Headings E1A and E1R. A greenhouse or cover for a swimming pool consists of a rigid framework made up from arch members 10 spaced apart by angle-irons 11 having glazing bars 12 shaped as shown bolted thereto for the reception of glass or plastic sheeting. The arch members are mounted on a brick base and made of aluminium or other weather resistant metal.
Patent GB-502793-A (GB)
Title: Improvements in and relating to hydraulic servo-mechanism applied to a gun or turret mounting
IPC: F16D43/10
Filed: 1937-06-25
Abstract: 502,793. Hydraulic transmission of power. NASH, A. G. FRAZER-. June 25, 1937, No. 17775. [Class 69 (ii)] [Also in Groups XXIV and XXI] In operating mechanism for a gun or turret mounting, drive is transmitted from a reversible rotary hydraulic motor tc the mounting through friction elements which are normally urged together by a spring, the effectiveness of the frictional connection being varied either by centrifugally-operated means or by means operated by variations in the pressure of the liquid supply to the motor due to changes in speed. As shown in Fig. 1, a pinion 8 is arranged between a disc 4, secured to a sleeve 3 fastened to the shaft 2 of the motor and a disc 6 splined on the sleeve 3. Weighted levers 12, pivotally mounted by pins 11 on a sleeve 9 splined on the sleeve 3, have cam surfaces 14 acting on the disc 6 through a ball thrust bearing 10. A spring 15 acts on the sleeve 9 to maintain a minimum pressure on the disc 6, which pressure increases as the levers 12 move outwards under centrifugal action. Alternatively, a member rigidly connected with the motor shaft may carry blocks which are slidable radially under the action of springs, augmented by centrifugal force, into contact with a driven member. As shown in Fig. 2, the member 6 is acted on directly by a spring 19 and is also controlled by levers 26 and 27 operated by pistons 32 and 33 located in cylinders connected by passages 36 and 37 with the supply of pressure fluid to the motor, so that, if shock arises in the pipe system of the motor, the levers are moved in a direction to reduce the effectiveness of the frictional drive.
Patent GB-543849-A (GB)
Title: Improvements in or relating to corrosion preventing means for internal combustion engines
IPC: F02B77/04
Filed: 1940-12-17
Abstract: 543,849. Preventing internal corrosion. UNITED AIRCRAFT CORPORATION. Dec. 17, 1940, No. 17777. Convention date, Dec. 19, 1939. [Class 7 (ii)] [Also in Group XIII] Corrosion within internal combustion engine cylinders when in storage or transport is prevented by inserting in a spark plug aperture a container with desiccating material. The container may comprise a threaded plug 38 carrying a wire mesh cylinder 42 with end caps 44, 46, the upper of which is threaded into the plug 38. The container may be filled with silica gel. In a modification, the cylinder 42 may be replaced by a cylinder of thermo-plastic material, preferably transparent, with longitudinal or circumferential slots. The silica gel may contain an indicating substance which changes colour with moisture absorption. When the engine is prepared for storage, the air intake to the crank case is sealed, and the seal may carry a moisture absorbent, and the valveoperating mechanism is released to allow all the valves to close.
Patent GB-547290-A (GB)
Title: Improvements in centering machines
IPC: B23B39/16
Filed: 1940-12-18
Abstract: 547,290. Drilling-machines. DORIN, A. Dec. 18, 1940, No. 17826. [Class 83 (iii)] Centring worA- :- Work rotating about its axis, is centred by an axially presented tool rotating in the opposite direction. A number of spindles 3 concentrically arranged about a driving shaft 9 are centred by drills 19 in spindles 18 similarly driven, but in the opposite direction. A common first . motor shaft 12 is driven by a motor 14. The drill head 15, on release of a catch 23, may be rotated round the axis of the shaft 12 to facilitate removal and replacement of the work. The Provisional Specification refers to machines formed in three separate parts, a base, an intermediate spacing element and an interchangeable tool carrier or head.
Patent GB-300943-A (GB)
Title: Improvements in or relating to devices for testing the brakes of road vehicles
IPC: G01L5/28
Filed: 1927-07-05
Abstract: 300,943. Frost, W., and Frost & Co., Ltd., H. July 5, 1927. Dynamometers.- A device for testing the brakes of road vehicles comprises attachment for connecting to a road wheel, two levers pivoted to the attachment coaxiallv with the wheel, one lever constituting a handle and being linked to the other by a device adapted to measure the turning effort. In the form shown in Fig. 2, a disc 10 has integral therewith three radial arms 18 arranged at 120‹ and each carrying a block 19 shaped to grip the tyre. Each block has a lug 20 provided with holes through which the outer screwed ends of the arms 18 can be passed and secured by nuts 22. The disc 10 may thus be arranged at different distances from the plane of the tyre to accommodate different wheels.. Mounted on a central stud 23 on the disc are two levers 13, 14 the lever 13 forming an operating handle. Integral with the disc 10 is a ratchet wheel 24 engaged by a pawl 25 carried by the lever 14 which is linked to the lever 13 by a spring balance 17 or like measuring device. The device is applied and clamped to the wheel undertest and the brake applied. When the lever 13 is operated to turn the wheel against the influence of the brake, the torque required is given by the balance 17. The pawl and ratchet device enables the brake to be tested at various parts of the drum without disturbing the setting of the device. In another form two levers connected by a spring balance are pivoted to a disc bolted concentrically to the wheel and one lever is also fixed to the disc the other serving as the operating lever. The device may be mounted on a stand provided with a lifting jack for the wheel.
Patent GB-225897-A (GB)
Title: Improved blocks, slabs or the like for paving and other purposes and method of manufacture and apparatus therefor
IPC: E01C5/18
Filed: 1923-07-10
Abstract: 225,897. Cowper, J. S. July 10, 1923. Stationary - mould machines ; feeding; delivery; extrusion machines.-Rubber or composite rubber paving blocks are formed of three layers, of which the intermediate layer is of harder rubber than the upper and lowest layers, the layers being moulded together in a mould press or by extrusion dies. In the first arrangement, Fig. 11, the material for the three layers is fed from hoppers a, each having upper and lower slides b, e and mixer d. Conveyers f transfer the material to a mould g supported on a plunger @ of a press, the said plunger being lifted to compress the material against the abutment k. Cores &c. are provided to form the interlocking means on the sides. After pressing, the plunger l is lowered until it contacts with a stop m, a slider n then engaging with the surface o to transfer the mould and block to a conveyer p, which leads to a vulcanizing-chamber. In another form, two superposed dies are arranged so that the layers are extruded in such manner as to produce ledges or recesses at the ends, the lower die being adapted to form both the intermediate and lowest layers. The blocks may also be formed by a multiple forcer, from which they pass in three-layer form to a knife and to pressing rolls. Specification 201,450, [Class 87 (i), Bricks &c.], is referred to.
Patent GB-1224231-A (GB)
Title: Improvements in or relating to image projectors
Inventor: SZYMBER OLEG
IPC: G03B21/53
Filed: 1968-04-16
Abstract: 1,224,231. Screw-and-nut mechanism. GAF CORP. 16 April, 1968 [17 April, 1967], No. 17942/68. Heading F2Q. [Also in Divisions G1 and H2] To maintain correct focus of an image projector, the objective lens is moved by an electric motor 61 in response to the photoelectrically determined position of the transparency 50. The lens 36 is mounted on a frame 28 with the motor 61 which drives a threaded shaft 68 through a gear train 62, 63, 66, 67. Shaft 68 carries a square nut 70 restrained from axial and rotary movement by a spring blade 72. As shaft 68 rotates it draws the frame 28 in a corresponding direction. To prevent damage by over-adjustment, one or other of catch member 74, 75 on shaft 68 engages a corresponding catch 70a, 70b on nut 70 and.supplies sufficient torque for nut 70 to over come spring blade 72 and turn harmlessly.
Patent GB-201541-A (GB)
Title: Improvements in artificial dentures
IPC: A61C13/00
Filed: 1923-07-11
Abstract: 201,541. R³d, L. J. June 29, 1922, [Convention date]. Teeth, artificial.-In dentures for the upper jaw, Fig. 1, or for the lower jaw, Fig. 2, the teeth 1 are secured, as usual, to hard rubber 2, but the tapering portions 3 in contact with the gums are formed of elastic rubber to give better adhesion. In an upper denture the parts 3 may be connected by an elastic strip 4 passing across the rear edge of the plate.
Patent GB-964906-A (GB)
Title: Improvements in liquid-cooled rotary electric machines
IPC: H02K9/19
Filed: 1961-05-18
Abstract: 964,906. Cooling dynamo-electric machines. ALLMANNA SVENSKA ELEKTRISKA A.B. May 18, 1961 [May 20, 1960], No. 18107/61. Heading H2A. In a dynamo-electric machine the rotor or commutator is cooled by liquid circulating through channels 32 formed by inwardly directed grooves in an annular cooling body located within the rotor. Fig. 4 shows a commutator in which segments 26 having cooling fins 36 are insulated by mica at 29 and by silica gel, quartz or silicone rubber at 30. A cylinder 31 of brass, copper or stainless steel has a helical groove 32 which, after the cylinder 31 has been soldered, welded or shrunk on to the hub 35, forms a duct for cooling water admitted by channels 33, 34. Use of a helical duct in the rotor may obviate the need for a cooling liquid pump. Grooves 32 may be parallel and have communicating channels. A rust preventive may be added to distilled or commercial cooling water. Fig. 1 (not shown) relates to a D.C. motor having grooved cooling members located near the coil ends and in other parts of the rotor and stator. Specification 923,913 is referred to.
Patent GB-569179-A (GB)
Title: Portable electric testing device
IPC: G01R31/02
Filed: 1943-11-03
Abstract: 569,179. Detecting faults; current detectors. GRUENBERG, C. Nov. 3, 1943, No. 18204. [Class 37] A portable testing device comprises two insulated conductors 1, an indicating lamp 6 in the circuit of each conductor and a test prod 8 at one end of each conductor, terminals 2 at the other ends of the conductors being arranged to be either connected to a source of current or short-circuited by a terminal bridge 12. The terminals 2 form the pins of a plug 3 and fit an ordinary wall socket. Adaptors for fitting to bayonet caps &c. may also be provided. The conductors 1 and plug 3 are sheathed with rubber, artificial rubber, or a thermoplastic material such as polyvinyl chloride. Recesses are provided in the sheathing to take the indicating lamps 6, which have contacts at both ends so that they can be connected between contact plates 7 and the test prods 8. The contact plates 7 may be springy or separate springs 10 may be employed. The indicating lamps 6 may be neon or other glow lamps, and series resistors may be provided either in the caps of the lamps or separately, in which case the resistors 9 may be moulded into the sheathing. Openings 11 are provided in the sheathing for observation of the indicating lamps and windows of glass or transparent synthetic material may be used: In the latter case, the windows can be moulded or welded to the casing. The test prods 8 are removably attached to the ends of the sheathing, as by screw-threads or bayonet couplings. A number of interchangeable prods may be provided. Connected sockets 12 in a cap 13 made of or covered with rubber &c. are provided for short-circuiting the pins 2 when it is desired to indicate a potential difference between two points or the polarity of a D.C. source. With the pins 2 connected to a source of current, continuity or earth leakage tests may be made. A battery may be provided as the source of current and may be in a container with a socket to fit the pins 2. Specification 553,570 is referred to.
Patent GB-218493-A (GB)
Title: Improvements relating to rotary internal combustion motors
IPC: F01C1/07
Filed: 1923-07-16
Abstract: 218,493. Davis, R. H. July 18, 1923. Bulbs.-Electric incandescent lamps c with bulbs of fused quartz glass transparent to ultra-violet rays are carried in an arched frame a provided with a reflector b. The bulbs may have a film of ordinary glass or mica.
Patent GB-580160-A (GB)
Title: Improved spectacle frames
IPC: G02C1/06
Filed: 1939-06-23
Abstract: 580,160. Spectacle frames. SENE, L. P. June 23, 1939, No. 18410. [Class 97 (i)] The shafts 4, 5 of a spectacle frame 1 when folded lie in the plane of the frame, so avoiding bulk. In the form shown, the shafts are of wire, pivoted in lugs 2, 3 on the frame, and with coverings 8 of plastic material at their free ends. The top edges of the frame and of the coverings 8 are grooved as shown in Fig. 4, so that, on folding, one shaft lies in the grooves of the frame and the other lies in part in the groove on one side of the frame and in part in the groove in the covering 8 of the other shaft. Fig. 6 shows a section through the hinge lug of a modified form, in which a recess 18 between the lug and the rim 19 receives the covered portion 16 of the opposite shaft, the lug lying towards the top of the frame. The lug is slit at 20 so that it may be tightened around the pivotal end of the shaft by a screw 21. Fig. 9 shows nose-pads 35, 36 which are integral with the frame and converge towards one another in front of the frame.
Patent GB-1465917-A (GB)
Title: Elastomeric hose
IPC: B29C48/32
Filed: 1974-04-26
Abstract: 1465917 Elastomeric hose E I DU PONT DE NEMOURS & CO 26 April 1974 [27 April 1973] 18414/74 Heading F2P A process for manufacture of a hose comprising extruding a tube of uncured elastomeric material consisting of a single layer having uniform physical and chemical characteristics, applying a textile reinforcement to the outer surface of said uncured tube, applying excess internal fluid pressure within said tube whilst heating at curing temperature to cause controlled outward protrusion of the tube material through the interstices of the textile reinforcement to form protrusions extending outwardly beyond the textile reinforcement. The hose formed may then be coated with a thin layer of a protective polymer. The uncured elastomeric material may be polychloroprene, EPDM, styrene-butadiene rubber, silicone rubber, urethane rubber, natural rubber, nitrile rubber, butyl rubber or chlorosulphonated polyethylene which is extruded in standard manner to form a tube around which is applied a knitted, braided or wound layer of reinforcing textile yarn of nylon, cotton, polyester or rayon having interstices of length 0À16-0À79 cm. and width 0À08-0À40 cm. the tube is then cured at a temperature of 80-250‹ C. under internal fluid pressure, 0À07-1À4 kg./cm.<SP>2</SP> greater than external pressure, to form elastomeric protrusions of 0À025-0À152 cm. length through the interstices. Compressed air introduced by means of a rotary joint may be used to pressurize the tube. Curing may be achieved by means of hot air, fluid bath, hot salt bath, microwave energy alone or in conjunction with a hot air oven, or by heating from within. The hose formed may then be dip-coated with a thin layer of latex, polyvinyl chloride or copolyetherester. In another embodiment the process is continuous-the hot soft extruded tube having the textile reinforcement directly applied to prevent its expansion while internal air pressure introduced into the hose. Alternatively the external pressure may be increased to prevent expansion of tube while textile reinforcement added and subsequently lowered to permit the protrusions to form.