baber/WOPTO huggingface dataset:
Patent GB-1118500-A (GB)
Title: Modulators using field-effect transistors
IPC: H03F3/393
Filed: 1966-08-05
Abstract: 1,118,500. Transistor amplifying circuits. LEEDS & NORTHRUP CO. 5 Aug., 1966 [31 March, 1966], No. 35247/66. Heading H3T. [Also in Division H1] A chopper-type amplifier is provided with a balanced input, a field-effect transistor being used as chopper; break through of the squarewave chopping pulses through the inherent capacity of the transistor is prevented by means of a balancing capacitor. In one embodiment, a gating waveform from generator 15, Fig. 1, is applied to the gate of FET 11, the source-drain path of which comprises a variable shunt on a bridge network comprising balanced amplifier input resistors 20A, 20B, signal source 12 which has internal resistance 13, and balancing resistor 17. Breakthrough of the gating waveform via the capacity 23, 28 between gate and case of the FET is prevented by means of balancing capacitor 22 connected between gate and drain. An unbalanced amplifier may be fed via a transformer with a centretapped primary replacing resistors 20A, 20B (Fig. 2, not shown), and the chopper may be connected in series instead of shunt (Figs. - 3B, 3C, not shown). With transformer input, a pair of choppers may be used in push-pull (Fig. 4B, not shown); details of the transformers are given in the Specification (see Division H1). Square wave generator.-Square waves are generated by means of a pair of transistors 35A, 35B, Fig. 5, cross-coupled over blocking capacitors 36 and differentiating circuits 41A, 41B; a resistor 39A, 39B respectively is connected between base and collector of each transistor. Clipper diodes 40A, 40B limit the extent to which the base of each transistor is driven by the feedback from the other; two outputs of opposite phase are provided, in each of which networks comprising a resistor 45, diode 46 and Zener diode 47 are provided for the purpose of producing chopper-drive signals of desired level and polarity.
Patent GB-487608-A (GB)
Title: Improvements relating to searchlights
IPC: H05B31/00
Filed: 1936-12-24
Abstract: 487,608. Arc lamps. SPERRY GYROSCOPE CO., Ltd., and THOMAS, H. L. Dec. 24, 1936, No. 35393. [Class 39 (i)] The arc flame of a searchlight is held in the proper position by a magnet, and means are provided for automatically adjusting the effect of the magnet to compensate for tilting the search light. The Figure shows an arrangement in which the magnet 16 is pivoted at 22 and held agaiiist a cam 17 by a spring 21. The cam 17 is pivoted and carries a weight 18, so that it remains in the same angular position when the light is tilted. In a modification the cam is held in position by a link connected to a fixed rod passing through one of the trunnions. Alternatively the magnet may be a fixed electromagnet, and the current in its coil may be varied by means of a rheostat, over which passes a brush carried by the searchlight drum.
Patent GB-1049445-A (GB)
Title: Thin filter
IPC: B01D24/04
Filed: 1963-09-10
Abstract: The filter comprises a tubular shell having a diameter several times as great as its axial length and being open at its opposite ends; across each end extends a circular screen of perforated metal plate or wire mesh; a rigid cylindrical tubular spacer is disposed between the central portions of the screens with its ends engaging them; axially disposed in the spacer is a stud which extends through the centres of both screens and has nuts threaded on its ends to stretch and stiffen the surrounding areas of the screens between the spacer and shell; and filter material (usually granular) is disposed in the annular region defined by the screens, shell and spacer.
Patent GB-837050-A (GB)
Title: Improvements in or relating to nickel plating
Inventor: MOHAN ANAND
IPC: C25D3/12
Filed: 1957-11-18
Abstract: 837,050. Nickel-plating baths. ALKAN Ltd., M. L. Sept. 30, 1958 [Nov. 18, 1957], No. 35833/57. Class 41. A nickel-plating bath contains nickel sulphate, boric acid, ethylene diamine tetra-acetic acid or a salt or derivative thereof, 2-mercaptobenzimidazole as brightener, and saccharine, naphthalene sulphonic acid or other substance rendering the nickel coating ductile. Preferably chloride ions are present in the form of ammonium or nickel chloride. Plating conditions are: temperature 40‹ to 80‹ C., current density 15 to 40 amps. per square foot, pH value 3 to 6. Any base metal may be coated but zinc and zinc alloys are specified.
Patent GB-343590-A (GB)
Title: Improvements in or relating to dental units
IPC: A61G15/14
Filed: 1929-11-23
Abstract: 343,590. Dental equipment stands. PIEPER, O. H. and PIEPER, A. F., 43, Appleton Street, Rochester, New York, U.S.A. Nov. 23, 1929, No. 35960. [Class 81 (ii).] In a dental equipment stand comprising the usual hollow column fitted with a dental engine, spittoon, bracket table, and various other appliances, including instruments to be used in the mouth and operated by compressed air or electric current, and a switch board and electric controls, the top of the column 15, Figs. 2, 3 and 5, is offset rearwardly and formed with a recess 30. A cover 48 for the recess constitutes an instrument support and tray, and is mounted on an arm 35 swinging about a horizontal pivot 42 mounted on a bracket 38 which in turn swings about a vertical pivot 37 within a slot on the column. The bracket 38 is formed on its underside with a cam surface. ending in a depression and engaging a spring-pressed plunger of an electric switch 43 so that when the bracket is swung to the position shown in dotted lines in Fig. 5 the electric circuits are closed and the switch plunger serves also as a spring catch for the bracket. The instrument support 48 is connected by swinging arms 50 to an auxiliary support 54 on which is mounted a carrier 64 for the instruments, such as a hot air syringe, air jet, cautery, and mouth lamp, operated by compressed air or electricity. The air supply tubes or flexible conductors supplying these instruments pass into the main column so that they may be drawn out when the instruments are used but are automatically retracted when the instruments are replaced, for instance as described in Specification 117,753, [Class 81 (ii), Medical &c. appliances]. A drawer 56 sliding in guides on the underside of the support 48 is provided with spring clips to hold various hand instruments and with a movable tray 62 to receive instruments which can be removed in the tray for sterilization. One or more air gauges 86 mounted within the recess 30, a call bell 77, a lamp for examining X-ray photographs, a pilot lamp, and spray--bottle warmers are provided. In a modification, shown in Fig. 8, the support 48 does not carry the instrument drawer but this is separately mounted on a pivot 90 on the back wall of the recess in the main column.
Patent GB-467738-A (GB)
Title: Improvements in or relating to printing presses
IPC: B41M1/24
Filed: 1935-12-30
Abstract: 467,738. Printing and embossing presses. ARMELIN, E. R. Dec. 30, 1935, No. 35970. [Class 100 (ii)] In a hand-operated printing and embossing press of the kind used for imprinting addresses on notepaper B by interposing a colourbearing strip A between a fixed die 8<b> and the paper, the paper B is pressed downwardly on to the die 8b which is provided with heating means. The die 8<b> projects through an aperture in the base 16<a> and is mounted on a hollow member 8<a> secured to the base, the member 8<a> including a chamber to 8<c> in which a lamp or a gas or electrical heating-device is placed. Pressure is exerted on the paper B by a platen 7 which is raised by a spring and depressed by a hand-operated cam 14<a>.
Patent GB-448798-A (GB)
Title: Improvements in or relating to vehicle brakes
IPC: F16D51/08
Filed: 1934-12-14
Abstract: 448,798. Fluid-pressure brakes. INDIA RUBBER, GUTTAPERCHA, & TELEGRAPH WORKS CO., Ltd., Thames House, Millbank, and TARRIS, F. J., c/o India Rubber, Gutta Percha, & Telegraph Works Co., Ltd., Silvertown, both in London. Dec. 14, 1934, No. 35976. [Class 103 (i)] A brake having blocks 9 applied and released from a drum by a tube 6 expanded and contracted by fluid pressure comprises C- shaped springs 10 embracing the tube 6 and adapted to maintain it in inoperative position. The ends of the springs 10 may be received in slots 11 in the sides of the blocks 9. The springs may be provided with loops entering holes in the supporting trough 8 to maintain the spring in position, or this may be done by providing a circumferential channel in the trough into which enters depressed parts of the springs, a wire passing round the trough lying in these depressions. Specification 302,385, [Class 103 (i)], is referred to.
Patent GB-402257-A (GB)
Title: Improvements in or relating to hose suspenders
IPC: A41F11/16
Filed: 1932-12-20
Abstract: 402,257. Hose suspenders. VINDRY, E., 6, Rue CÚsar Frank, Paris. Dec. 20, 1932, No. 36116. [Class 141.] A hose suspender comprises two suspender ribbons 3, 3 joined together at 4 or crossed on the front of the leg at a fixed angle to one another and adapted to be attached to the hose 1 at two opposite points 2, and connected to a supporting ribbon 5 which passes round the leg, the arrangement being such as to apply a horizontal pull on the hose between the two points of attachment of the suspender ribbons 3. The fixed angle between the ribbons 3 may lie between 90‹ and 150‹, and the ribbons may be between 9 cm. and 12.5 cm. in length. The buckle by which the ribbon 5 may be fastened on the leg is situated at the side of the leg at a distance of not less than 5 cm. from the connecting point of the ribbons 3.
Patent GB-753837-A (GB)
Title: Improvements in sealed adjusting devices for instrument cases
IPC: G01D11/02
Filed: 1954-12-14
Abstract: 753,837. Stuffing-box substitutes. SANGAMO WESTON, Ltd. Dec. 14, 1954 [Dec. 14, 1953], No. 36226/54. Class 122(5) [Also in Group XIX] A stuffing-box substitute for a zero-adjusting device comprises a housing 1 hermetically sealed in an aperture in the casing 3 of indicating-apparatus whose spring is adjusted by pin and slot means 7, 8b. The pin 7 is integral with or sealed to a closure 16 for metallic bellows 14 sealed round their open end round the lower open end of the housing 1. The upper end of the pin 7 is journalled in a hole 20 offset from and at an angle to the axis of an adjusting member 5 rotatable on an annular shoulder 9 at the outer end of the housing 1 and retained by a spring clip 11.
Patent GB-174845-A (GB)
Title: New or improved direction indicator and screen cleaning device for use on motor vehicles
IPC: B60S1/04
Filed: 1920-12-29
Abstract: 174,845. Clark, B. C. Dec. 29, 1920. Windows and the like, cleaning.-In a turning and stopping signal for use on motor-vehicles, the signalling-arm carries a strip of rubber, felt, &c. adapted to act as a squeegee, and is mounted so that when the device is operated, the rubber &c. moves in contact with, and cleans, a part of the front of the wind-screen. As shown, an arm c in the form of an arrow pivoted at d and rotated by a hand-wheel &c. to give the desired signal, carries a strip of rubber or felt r secured in an undercut groove in the arm. The aim is held in the signalling positions by spring or frictional means. The pivot may be between the ends of the arms which carries two strips of rubber &c.. one at each side of the pivot, and the pivot may pass through the glass of the screen, so that a circular area of considerable size can be cleaned.
Patent GB-1434196-A (GB)
Title: Liquid crystal display arrangements
IPC: G02F1/1337
Filed: 1972-08-04
Abstract: 1434196 Liquid crystal compositions MARCONI CO Ltd 16 July 1973 [4 Aug 1972] 36479/73 Heading C4X [Also in Division H4] Nematic liquid crystal compositions having a high positive dielectric anisotropy and useful in an electro-optic device (see Divisions H3- H5) comprise (a) equal parts of p-n-butoxy-; p-n-hexoxy-; and p-n-heptylcarbonyloxy-; substituted benzylidene-p<SP>1</SP>-cyanoaniline; or (b) 20% p-pentyloxybenzylidenep<SP>1</SP>-cyanoaniline and 80% p-methoxybenzylidene-p<SP>1</SP>-n-butylaniline.
Patent GB-1072266-A (GB)
Title: Process for the production of alkyl aluminium compounds from alpha-olefins, metallic aluminium and hydrogen
Inventor: JARZYNSKA MARIA
IPC: B01J31/14
Filed: 1964-09-07
Abstract: Pressures of not more than 10 atmospheres may be employed in the preparation of alkyl aluminium compounds by the reaction of metallic aluminium, hydrogen and an alkyl aluminium compound when the reaction is carried out in the presence of finely divided alumina, magnesia, silica or aluminosilicate. The alkyl aluminium hydride first formed may be reacted with an olefine to form a tri-alkyl-aluminium or the latter may be formed in a single stage reaction by including the olefine with the initial reactants.
Patent GB-412580-A (GB)
Title: Improvements in and relating to small arms
IPC: F41C27/06
Filed: 1932-12-28
Abstract: 412,580. Smallarms. BLACKER, L. V. S., Eartham Cottage, Eartham, Chichester, Sussex. Dec. 28, 1932, No. 36701. [Class 119.] A tube a adapted to support a grenade d has detachably secured thereto a pistol, revolver, or similar small size bullet-discharging weapon b, the discharge of the grenade from the tube being effected by a mechanical firing device actuated by the firing of the weapon. In the form shown, the pistol is attached to the tube a by a clamp c the muzzle end of the pistol abutting against a false muzzle i carried by a spring-pressed sleeve h to which is attached by side arms m the firing pin g for the grenade. On discharge of the pistol the bullet or the gun gases act on the sleeve h to fire the grenade. In place of the means shown, any of the devices described in Specification 392,329 may be employed for discharging the grenade. The rear of the tube is provided with a telescoping spring- controlled shoulder-piece o, and the front of the tube is adapted to receive a bayonet to convert the tube into a pike. A guard x in line with the muzzle prevents obstruction of the pistol bullet.
Patent GB-1466759-A (GB)
Title: Device for crosswise laying of rectangular bundles of paper or the like
Inventor: JENSEN FREDRIK
IPC: B65H/
Filed: 1974-08-21
Abstract: 1466759 Delivering sheets LINDACO Ltd 21 Aug 1974 [26 Sept 1973] 36771/74 Heading B8R Bundles formed by merging sheets from pockets 1, Fig. 1, by means of a friction pad 3 on an endless belt 4, Figs. 1 and 3A, are dropped on to an inclined table 6 adjustable in position according to sheet size, over which they pass by gravity and inertia to fall into a receptacle 10 inclined longitudinally and laterally and having stack abutment plates 12 on its two lower sides, and a pin 8 is projected upwards through a hole 7 in the table, by drive means 9 controlled by a microswitch 18, for every second bundle, which is thereby rotated through 90 degrees, so that a stack in the receptacle is formed of bundles alternately staggered through 90 degrees, the bundles being aligned by a jogger 11. The pin 8 may be caused to project through a slot in the table by radial movement, being supported by a rotary stop motor.
Patent GB-822903-A (GB)
Title: Improvements in or relating to cathode ray tubes
IPC: H01J31/20
Filed: 1955-12-22
Abstract: 822,903. Colour television. PHILCO CORPORATION. Dec. 22, 1955 [Jan. 7, 1955], No. 36782/55. Class 39(1). In a television tube of the kind wherein electron beams e.g. R, G, B, Fig. 6, pass through an apertured or foraminous electrode 20 which is electrically energised so that each opening 21 acts as a focussing lens to concentrate each beam on its respective phosphor dots, the dots 17a, 17b, 17c are widely spaced on the screen 32 so that adjacent dots are outside the return paths 26, 27, Fig. 7, of high speed primary electrons initially reversed by the atomic field in the aluminised screen 19 and then parabolically deflected in the field of the electrode 20. The phosphor dots may be 3-5 mils. in diameter in the usual triangular arrays with their centres at 3-6 mils. spacing, giving a ratio of coated to uncoated areas of the screen between 1/10 to 1/30. The corresponding spacings for the holes 21 are 40-50 mils. with the electrode 20 ¢ in. from the screen 16 and the screen 16 15 in. from the beam deflection centre, using electron guns of #-“ in. diameter. The invention is stated to be applicable to monochrome or multicolour tubes with either a single electron gun or a plurality of guns and to multicolour tubes using phosphor strips.
Patent GB-979936-A (GB)
Title: Apparatus for cooling gases
IPC: F25B9/06
Filed: 1962-09-28
Abstract: 979,936. Refrigerating. SULZER FRERES S.A. Sept. 28, 1962 [Oct. 4, 1961], No. 36963/62. Heading F4H. In a gas cooling system as described in Specifications 979,935 and 870,091 the turbine and compressor circuits are connected by a pressure equalization conduit. As shown, the pressure equalization conduit 20 connects a point 23 on the inlet side of the compressor 3 to either a point 24 adjacent the turbine 1 or to a point 25 downstream of said turbine. A regenerative heat exchanger 22 is located in the conduit 20 so that if the pressure in the compressor circuit rises relatively hot gas therefrom is cooled before entering the turbine circuit, and if the pressure falls gas from the latter is warmed before entering the compressor circuit. The supply of gas to the gas bearing of the shaft 2 connecting the compressor and turbine is controlled by a valve 34 in a supply line 33. The valve is controlled by an electro-pneumatic device 37 in dependence on the speed of the compressor as sensed by a pick-up coil 35 which transmits impulses to a transformer 36 supplying direct current to the device 37. Gas from the bearing is supplied through a chamber 16 and conduit 18 to the compressor side of the conduit 20. Labyrinth seals 28 and 29 are provided on the ends of shaft 2 adjacent the turbine and compressor respectively, the seal 28 communicating via an annular chamber 30 and a conduit 31 with the turbine side of conduit 20. Gas is discharged from the apparatus when necessary through a conduit 38 which includes a valve 39 controlled in dependence on the temperature of the regenerative heat exchanger 22. When a large quantity of gas is admitted to the bearing, and hence to the compressor circuit, through line 33, relatively hot gas from the compressor circuit flows towards the turbine circuit, the heat exchanger is heated thereby and the valve 39 is opened, the valve closing when the temperature of exchanger 22 falls. Provision is also made to supply gas to the apparatus through a line 38a in the event of leakage, the line including a valve 39a which, like valve 39, is controlled in dependence on the temperature of exchanger 22 but which closes as the said temperature rises and vice versa. In the embodiment of Fig. 2 (not shown) the conduit 20 is connected to a point between the heat exchanger 12 and the adjustable throttle 11 of the compressor circuit, and to the inlet of the turbine. The gas supply to the bearing is taken from the compressor outlet and there is no provision for discharging gas from the apparatus. In Figs. 3 and 4 (not shown) the apparatus is of the form described with reference to Figs. 3 and 4 of the drawings accompanying Specification 979,935 and the pressure equalization conduit connects the outlet of the compressor and the inlet of the turbine. Specification 947,025 also is referred to. Reference has been directed by the Comptroller to Specification 870,091.
Patent GB-993182-A (GB)
Title: Fluid flow control valves
IPC: F16K31/44
Filed: 1962-09-28
Abstract: 993,182. Valves. GARRETT CORPORATION. Sept. 28, 1962 [Sept. 29, 1961], No. 36965/62. Heading F2V. A hermetically sealed valve for high pressures and toxic or corrosive fluids comprises a valve body 101 having an inlet and outlet 102, 115 and a valve member 111 co-operating with a seat 104, a helically coiled actuating stem 121 having one end extending into the body through an aperture 116 and connected with the valve member, a helically coiled tube 122 enclosing with clearance the externally disposed portion of the stem, the inner and outer ends of this tube being hermetically sealed, e.g. by welding respectively to the valve body round the aperture 116 and at 124 to the outer end of the stem 121, and actuator means connected with the outer end of the stem whereby it may be turned about the axis of the helix to actuate the valve. The outer end of the stem is coupled to a radius arm 125 pivoted on a control shaft 126 rotatable by a handle 132, the stem carrying a cam 127 bearing on a bell-crank lever 131 which bears on the radius arm 125. Stops 136, 137 limit the rotation. The valve is protected by a cover 138. In another embodiment, Figs. 1 to 6 (not shown), the helical stem is rotatable by the inner end being coupled to a radius arm pivoted in a chamber within the valve body, the outer end being coupled to a second radius arm pivoted outside the body and linked to a screw actuator. Hermetic sealing is effected by a pair of inner and outer helical tubes which surround the stem. The inner end of the outer tube is welded to the valve body, the outer ends of the two tubes being welded together and the stem extending freely through the outer end of the inner tube and being welded to this tube at the inner end thereof. Stagnation in the space between the two tubes is avoided in that passage for fluid is allowed past flats on a slidable carrier carrying the valve member which co-operatea with an adjustable seat, the said space being connected at each convolution to the valve outlet through a pipe. Specification 838,388 is referred to.
Patent GB-955166-A (GB)
Title: Improvements in musical instruments
IPC: A63H5/00
Filed: 1961-10-16
Abstract: 955,166. Sound producing toys. A. GREENWOOD. Oct. 9, 1962 [Oct. 16, 1961], No. 37046/61. Heading A6S. [Also in Division G5] A striker 28 on a flexible support 26 is disposed outside a ring assembly of channelshaped sonorous elements 16. The device may be trundled as a toy. The sonorous elements may be tuned to different notes which are sounded successively as the striker support 22 turns about the assembly or the assembly turns within the support. In Fig. 1, the sonorous elments 16 are secured by adhesion to a sponge rubber sleeve 14 on a drum fixed between two wheels or discs 12. In a modification, Fig. 2, the sonorous elements 16 are connected between a pair of rubber rings 30 carried by the drum. Lugs 32 on the rings engage slots on the elements. A number of assemblies of sonorous elements may be mounted in a box with their individual strikers to form a toy carillon. Either the sonorous elements or the strikers are fixed. In a carillon, all the sonorous elements of each single assembly are tuned to the same note. Specification 870,511 is referred to.
Patent GB-1322377-A (GB)
IPC: F21V7/22
Filed: 1970-07-31
Abstract: 1322377 Injection moulding PROJECTEURS CIBIE 31 July 1970 [5 Aug 1969] 37103/70 Heading B5A [Also in Division F4] A headlamp reflector is made by stamping out a sheet metal casing 2, injection moulding a layer 3 of thermoplastic material on to the interior of the casing 2, and applying a reflective coating 4 to the free surface of the layer 3. The thermoplastic material is injected into the space between the casing 2 and an appropriately shaped die (not shown).