baber/WOPTO huggingface dataset:
Patent GB-892446-A (GB)
Title: Demodulation circuit
Inventor: HOPEWELL DEREK HERBERT
IPC: H03D1/18
Filed: 1959-06-22
Abstract: 892,446. Transistor demodulation circuits. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. June 21, 1960 [June 22, 1959], No. 21336/59. Class 40(6). A transistor amplitude demodulation circuit comprises two transistors Tl, T2 connected in common base configuration, pushpull input connections to the emitter electrodes of the transistors and a common resistor R3 through which the collector currents of both transistors flow, the voltage drop across resistor R3 providing the output of the demodulation circuit. The push-pull input connections are provided from a centretapped secondary winding of an input transformer 2, the centre tap 3 of the winding being directly connected to the bases of the transistors and the outer taps 4, 5 connected through equal resistors R1, R2 respectively to the emitters of T1 and T2. A D.C. supply source 8 is connected between one end of resistor R3 and the centre tap 3. Since the voltage across each half of the secondary winding of the transformer will reverse in polarity during alternate half cycles of the carrier frequency then one transistor will conduct during the first half -cycle and the second one during the second half cycle, and since the collector currents of each transistor flow in the same direction in successive half cycles full wave rectification is achieved and the voltage variation between output terminals 6, 7 follows the modulation envelope.
Patent GB-1426387-A (GB)
Title: Internal-combustion piston engine
IPC: F02F1/24
Filed: 1973-05-04
Abstract: 1426387 Bearings REGIE NATIONALE DES USINES RENAULT and AUTOMOBILES PEUGEOT 4 May 1973 [5 May 1972 23 June 1972] 21452/73 Heading F2A [Also in Division F1] Cast iron bearing caps 24, are located in recesses in a die-cast light-alloy crank-case 32 by studs screwed into tapped holes in the caps. The studs may extend through the caps and serve to hold together castings forming the crank-case 32, a cylinder block 5 1 , a cylinder head (1), Fig. 2 (not shown), and a valve gear housing (2), or additional studs 34 may secure the caps to the crank-case. Rough cast stud receiving holes 22 in the crank-case 24, Fig. 3, may form lubricating oil passages to bearing oil inlets 20.
Patent GB-571964-A (GB)
Title: Improvements in or relating to electrical switches
IPC: H01H23/16
Filed: 1943-12-22
Abstract: 571,964. Snap-action switches. SMART & BROWN (ENGINEERS), Ltd., and SONNENFELD, H. Dec. 22, 1943, No. 21479. [Class 38 (v)] A snap-action switch comprises a conducting roller 1 (or ball) which, in the closed position shown, bridges two spring contacts 2. An upward movement of the handle 10 rolls the roller over the shaped surface 3 until, when it reaches the peak and the contacts are about to separate, the spring 5 is fully compressed. A slight further push unloads the spring 5 and the roller 1 rapidly rolls onto an " off " stop 7 of cork or rubber. In Fig. 2 the surface 3 is on a member 16 freely pivoted at 17. In another modification, Figs. 3, 4 (not shown), the roller is rigid with the handle and the snap-action is obtained from a movable track mounted on one or a pair of springs. The trunnions 13, forming the pivotal mounting for handle 10 engage grooves 14 in the removable face plate 12. Self-cleaning of the roller 1 is obtained from abrasive material arranged on the track or so as to contact the roller in the " off position. The line of the peak may be slightly out of the parallel, so as to present " faltering" at that point of the movement.
Patent GB-1194113-A (GB)
Title: A Method of Manufacturing Transistors
IPC: H01L23/29
Filed: 1968-05-07
Abstract: 1,194,113. Semi-conductor devices. INTERNATIONAL BUSINESS MACHINES CORP. 7 May, 1968 [18 May, 1967], No. 21553/68. Heading H1K. A method of fabricating a transistor having a complex base region of relatively active and relatively inactive parts comprises defining, by means of an aperture in an insulating layer 11 of silicon dioxide on a semi-conductor substrate 10 containing an impurity of the one type conductivity, that part where the complex base is to be, and forming on the exposed substrate surface, over that part which is to be the relatively inactive base region, a layer 15 of silicon dioxide doped with an impurity of the opposite type conductivity to leave uncovered that part 14 where the relatively active base region is to be. The coated substrate 10 is then heated to diffuse the impurity from the layer 15 into the substrate to form the relatively inactive base region 16. Then a further impurity of the opposite type conductivity is diffused through the uncovered portion 14 to form the relatively active base region 17. Finally an impurity of the one type conductivity is diffused through the same portion 14 to a lesser depth to form the emitter 18.
Patent GB-709357-A (GB)
Title: Improvements in or relating to pneumatic conveyors with two separators in series
IPC: B65G53/60
Filed: 1952-08-27
Abstract: 709,357. Pneumatic conveyers. BUHLER, GEB. Aug. 27, 1952 [Sept. 6. 1951], No. 21555/52 Class 78 (1) The conduit 1 delivers the material to a separator 2 from which the greater part of it falls into a discharging device 3, such as a rotating bladed wheel. The rest of the material and the conveying air pass through a pipe 4 to a separator 5 from which the material passes through a discharge device 6 to the discharger 3. A pipe 7 connects the separator 5 to a fan 8 driven by a motor 9.
Patent GB-1387246-A (GB)
Title: Disc brake
IPC: F16D55/228
Filed: 1973-05-07
Abstract: 1387246 Disc brakes with anti-rattle devices DEUTSCHE BENDIX AUSRUSTUNGS GmbH 7 May 1973 [12 May 1972 25 Oct 1972 25 Jan 1973 17 March 1973] 21562/73 Heading F2E In a disc brake having a caliper with an aperture for allowing radial insertion of pads, two opposed pads are held by an anti-rattle wire spring abutting a side of each pad facing the aperture by two resilient portions, against at least one pad retaining pin, and secured against axial movement by means of a U-shaped anchoring portion embracing a projection of the caliper, the resilient portions providing a preload on, and frictional engagement with, the pads. The anchoring portion 11 of the spring 10, Figs. 1, 3, engaging the projection 13 of the caliper 1, acts as a pad limit stop. Axial portions 15, 15<1> preferably with knurled, or plastic or rubber coated, surfaces engage the back-plates 6, 6<1> of the pads 5, 5<1> so that they move therewith during actuation to provide a return force on the pads. The ends are bent at 17 to avoid damage to rubber boots protecting opposed actuator pistons. The axial portions may be inclined, Fig. 3, 20, or the spring may extend past a further retaining pin to a further projection 13a of the caliper. Alternatively, the spring 10 may be axially broadened between the projections 13 and the retaining pin 8 to provide a limit stop for the pads after wear. To avoid pre-loading the spring 10 when the retaining pin 308 is inserted, Fig. 8, a lever 318 hooks on the projection engaging portion 311 and is forced down on to the spring to pre-load it only when the further retaining pin 308<1> is inserted, the pins 308, 308<1> being axially restrained by the lever 318 in grooves 321, 321<1> thereof, or the lever 318 hooked under the further projection 313a. The lever 318 may be so dimensioned as to act as the limit stop.
Patent GB-479203-A (GB)
Title: Improvements relating to glass cleansing machines
IPC: A47L15/06
Filed: 1936-08-06
Abstract: 479,203. Cleaning drinking - glasses. CLARKE, T. A.. MALIN, J., and HINKS, G. F. Aug. 6, 1936, No. 31641. [Classes 19 and 138(i)] A glass-cleansing machine comprises an axially-disposed and preferably rotatable menber adapted to be inserted in the interior of a glass, the member being provided with resilient rubber loops secured at their ends to the member, and means being provided for discharging water under pressure into the interior of the glass adjacent the loops. In the construction shown, a tubular shaft 5 adapted to be driven by an electric motor B is provided with looped rubber cleansing members 6 which are formed from a single sheet of rubber. The tube 5 is sheathed with rubber 8, 7 and is provided with radial strips 10 adapted to cleanse the rim of a glass placed over the looped members 6. Water is supplied from a source 9b to the interior of the tube 5, escaping to the interior of the glass through apertures 5b. The exterior of the glass is cleansed by resilient flaps 13 mounted on perforated rods which also communicate with the source of water supply. The cleansing members are surrounded by a casing 14 provided at the front with a closure member 17 of sheet rubber which is apertured to permit entry of the glass to be cleaned. A frame 18 carries a sheet 19 with a smaller hole for cleansing a smaller-sized glass. The frame is mounted to be capable of movement to an unobstructive position as shown in Fig. 3. Alternatively the frame may be hinged at the front of the casing. Specification 371,704 is referred to.
Patent GB-433498-A (GB)
Title: Improvements in mosquito and similar screens for windows and the like
IPC: E06B9/68
Filed: 1934-07-24
Abstract: 433,498. Window blinds. KINSEY, D. S., Corner House, Commissioner Street, Johannesburg, South Africa. July 24, 1934, No. 21644. [Class 52 (v)] A window screen of resilient sheet material is attached to a rotatable roller and slides in slots in frame side members, and has means for maintaining a restraining force on the unrolled end of the sheet in all positions thereof. A metal frame 2, 3 carries a roller 4, 5 on brackets 6, a rectangular sheet of wire gauze 7 being wound on the roller. The free end of the sheet 7 is stiffened by a bar 9 and the edges of the sheet slide in slots 10 in the side members 3 of the frame. The roller has conical end portions 5, 5<1> round which are passed flexible cords 12 secured to the rollers and to bar 9 at 14, and the cords which pass round pulleys 17 maintain the sheet under a constant tension when it is raised or lowered by the handle 16. In a modification, not shown, the roller has cylindrical end portions and a cord is secured to each end portion and wound thereon in opposite directions and passed over pulleys, the bar 9 maintaining a tension on the sheet by its gravitational pull and frictional engagement at the sides.
Patent GB-756423-A (GB)
Title: Improvements in hearing-aid devices for connection to sound reproducing apparatus
IPC: H04R25/00
Filed: 1951-09-14
Abstract: 756,423. Circuits for telephone instruments. LANE, A. Nov. 28, 1952 [Sept. 14, 1951], No. 21647/51. Class 40 (4). An attachment for connection to the low impedance electrical output terminals of a speech reproducing set such as a radio or a record player comprises an input transformer 15 and tone and volume controls 16-19 for connection in the circuit of a deaf aid receiver 22. The attachment which is enclosed in a can 14 has input and output plug-and-socket arrangements and the can has weighted straps by which it can be held upon the arm of a chair. The input transformer is made to resonate at the higher end of the speech band in order to enhance the poor response of miniature earpieces such as are used by deaf persons.
Patent GB-566944-A (GB)
Title: Improvements in woven fabric
IPC: D03D47/00
Filed: 1943-02-20
Abstract: 566,944. Woven fabrics. WRIGHT & SONS, Ltd., M., and WILLIAMSON, W. Feb. 20, 1943, No. 21803/44. Divided out of 566,922. [Classes 142 (ii) and 142 (iv)] A double woven fabric comprises front warps F<1>, F2 interlaced with double picks of a front weft wf inserted from one edge, rear warps R<1>, R<2> interlaced with double picks of a rear weft wf<2> inserted from the same edge, binding warps B<1>, B<2> binding the two wefts together and a common selvedge thread S locking the bights of the double picks at the return edge. The selvedge thread extends through the bights of a front and rear weft in one direction and through the bights of the next rear and front weft in the opposite direction. A band of warps G, forming the " gut," extends between the two sets of double picks. Specification 566,922 is referred to.
Patent GB-966341-A (GB)
Title: Telecommunication link
IPC: H04L12/54
Filed: 1961-06-16
Abstract: 966,341. Telegraphy. STANDARD TELEPHONES & CABLES Ltd. June 16, 1961 [June 20, 1960], No. 21835/61. Heading H4D. The invention provides a system in which there is a receiver which can accept and store data received in any of a number of different codes, and a retransmitter which can retransmit the stored data in any of a number of different codes. Start and stop bits are deleted at the receiver, and, if required, are reinserted at the retransmitter. Fig. 2 illustrates an embodiment which can accept and retransmit in 5-unit synchronous or 7-unit non-synchronous code. Signals received on rj are centre-sampled at 23 by pulses from timing unit 47. Signals S, T are initiated in accordance with the signals being receivedsignal S for 5-unit code and signal T for 7-unit start-stop code. In the case of 7-unit code the sampled signals pass to stage 1R6 of register 1R. As a character is received the register fills, and when the start bit leaves 1R1, 1R1-1R5 will contain the data bits and 1R6 the stop bit. During the stop bit the five data bits are transferred via gates 1G controlled by pulse g to register 2R and from thence passed to the exchange 6. In the case of 5-unit code, the sampled signals pass to stage 1R5 of register 1R, and pulses g occur at every fifth bit rather than at every seventh, the timing unit 47 being controlled by S and T. In a modification, the sampled signals are passed directly to the relevant stage of register 1R by means of a distributer controlled by timing unit 47. The retransmitter receives serial 5-unit signals from the exchange 6 and stores them in register 1R. The signals pass via gates 1G, in response to signals g, to register 2R and from thence to distributer 63 which passes the signals to line tk either as 5-unit signals or as start-stop signals, as selected by signals S or T. The recurrence period of g depends on S and T. The start and stop bits added may be varied from character to character, according to a predetermined sequence. The distributer unit 63 is described in detail with reference to Fig. 8 (not shown), and comprises gating arrangements fed by timing signals from unit 58 to evolve the synchronous or non-synchronous signals. Signals S and T may be manually selected, by push-button, or automatically selected. Fig. 9 (not shown) illustrates an arrangement of gates and triggers whereby a signal S or T is generated automatically. For example, when signal T is being generated each received combination of 5 bits is inspected, and if a particular combination is found the arrangement immediately changes to provide a signal S. Specification 790,914 is referred to.
Patent GB-250165-A (GB)
Title: Improvements relating to track trip mechanism for railway vehicles
IPC: B61L3/08
Filed: 1925-09-02
Abstract: 250,165. Westinghouse Brake & Saxby Signal Co., Ltd., (Assignees of McWhirter, W. C.). April 6, 1925, [Convention date]. Track apparatus actuating signals on trains and for stopping trains. - A track trip device adapted to co-operate with a train-carried control device of any suitable type is biassed to the operative position by a counterweight under control of a shockabsorbing device, and is moved to inoperative position by an electromagnetically-operated lever mechanism. The track device 5 located near the track rail 8 is mounted on a shaft 3 which can be rotated by mechanism in the casing B through a shaft 1 journaled in the casing and a connecting shaft 6 with universal joints 7, 7<a>. Shaft 1 is biassed to hold device 5 in operative position (dotted line 12, Fig. 4) by a counterweight 9 aided by an adjustable spring 10. Weight 9 rests on a rubber or like shock-absorbing support 13. Shaft 1 is rotated to move the device 5 to inoperative position (dotted lines 11, Fig. 4) by energizing a magnet A having a winding 22 and magnetic cover and case 23, 20. The magnet plunger has an extension 24 provided with projecting pins 26 having antifriction rollers engaging slots formed in a sleeve carried by shaft 1 and constituting a crank. A crescent-shaped member 30 has its ends engaged in recesses formed in the sleeve, and its outer surface engaging the bottom of a groove 25 formed in the plunger. Member 30 thus acts as a guide for the plunger, co-operating with a roller 35. Return of the mechanism to operative position is retarded by a dashpot D, the piston of which is connected by a rod 38 to an arm 15 on shaft 1. Magnet A is energized from a battery 49, under control of a switch 50 which is operated by any suitable means in accordance with traffic conditions. The magnet circuit includes a resistance 48 which is normally shunted by a contact 45, bridging contacts 46, 47 and moved by suitable connection with arm 15. When switch 50 is closed, magnet A is energized by strong current, resistance 48 being shunted. As the magnet plunger reaches its raised position, contacts 45, 46, 47 are opened, and a hold-up current of reduced strength is supplied.
Patent GB-479767-A (GB)
Title: Improvements in or relating to abrasive articles and methods and apparatus for manufacturing the same
IPC: B24D11/00
Filed: 1936-08-10
Abstract: 479,767. Flexible abrasive sheets. CARBORUNDUM CO. Aug. 10, 1936, No. 22022. Convention date, Sept. 5, 1935. [Class 60] A flexible abrasive article comprises a single layer of abrasive grains partially embedded in a surface of a self-supporting flexible sheet of a bonding material which is thinner than the major dimension of the abrasive grains. A flexible reinforcement such as wire gauze or mosquito netting may be embedded in the sheet. The bonding material may be a heat hardenable, permanently thermoplastic, or air drying adhesive, initially solid, in solution or dispersion or liquid, e.g. phenol-aldehyde condensation products which may be oilmodified, vinyl resins such as polyvinyl chloride or acetate or a vinyl ester modified by an aldehyde such as formaldehyde or acetaldehyde, alkyd resin, cellulose esters or ethers, varnishes or lacquers. A mixture of abrasive grains and powdered bonding material is fed on to an endless belt 3 from a hopper 6. The mixture is carried over an electrical heating element 9 where the bonding material is softened to bind the abrasive grains and flows to leave the upper parts of the abrasive grains projecting. Cooling air from a blower 12 solidifies the adhesive and the sheet thus formed is removed from the belt 3 by a scraper 13 and rolled up on a roller 14. In an alternative form of apparatus, liquid bonding material is first applied, followed by abrasive grains. Additional adhesive may be sprayed on to form a sizing coating. The belt may have a surface of amalgamated, highly polished, or chromiumplated metal and adhesion of the bonding material may be reduced by applying a solvent or by coating with talc, mica or soap. The formed sheet may be further heat treated before or after rolling up, for example, by passage through hot mercury or by the method described in Specification 467,111.
Patent GB-321167-A (GB)
Title: Improvements in or relating to spring wheels for vehicles
IPC: B60B9/20
Filed: 1928-07-31
Abstract: 321,167. Johnsen, A. J. July 31, 1928. Spring wheels. - A resilient wheel comprises a pneumatic tyre f seated on a two-part rim d and an inner pneumatic cushion b fitted between the rim d and the flanges a<2>, a<3> of the wheel-centre a, the flange a<3> being detachable. The base of the rim d is of wedge-section, the flange d<1> being detachably secured by bolts g fitted in transverse apertures d<2> in the rim-base.
Patent GB-631142-A (GB)
Title: Apparatus for plugging sheet material and more especially veneers, with scarfed plugs
IPC: B27G1/00
Filed: 1947-08-08
Abstract: 631,142. Plugging knot-holes etc.; circular saws. LEINO, E. M. Aug. 8, 1947, No. 22151. Convention date, Dec. 22, 1943. [Classes 145(i) and 145(ii)] An apparatus for plugging sheet material especially veneers, with scarfed plugs comprises a device for cutting a plug hole 16 in the sheet, one or more containers 5 for adhesive-coated scarfed plugs 12 located at a distance from the cutting device, means 6 for removing a plug from a container, and a heated member 9 for transferring the removed plug to the plug hole and securing it therein. Scarfed holes 16 are cut in the sheet material 15 by means of a circular saw 2 rotating about an axis 3 which in turn can reciprocate about the axis 4. An adhesive-coated plug 13 is removed from the pile by a pusher 6 and brought below the heated head 9 which is preferably fitted with spikes 11 and glueing teeth 10. The head, carried by a shaft 8 which can move vertically and also rotate in a cylindrical bearing, is brought into contact with the plug, raised, rotated, and lowered to press the plug into the previously cut plug-hole 16 and secure it therein. The head 9 is preferably electrically heated, whilst the adhesive preferred is a dry thermosetting glue. The mechanism may be operated by compressed air.
Patent GB-1151696-A (GB)
Title: Heat Exchangers
Inventor: LANE MICHAEL
IPC: C02F1/04
Filed: 1965-05-25
Abstract: 1,151,696. Distillation, vapour-compression type; desalination of water. COURTAULDS Ltd. 24 May, 1966 [25 May, 1965], No. 22151/65. Heading B1B. [Also in Divisions F2 and F4] In a heat exchanger intended for use in a vapour compression process for the desalination of sea water and in which tubes 3 of thin thermoplastic film extend vertically between upper and lower tube plates (only the lower plate 1 being shown), the tubes are suspended from the top plate which is rigidly mounted, and at least partially support the weight of the bottom plate, whereby the tubes are tensioned. The tension may be supplemented by the addition of weights to the bottom plate or by a downwardly-urging spring; or if necessary, the tension may be reduced by an upwardly-urging spring. The tube assembly shown is disposed in a tower 2 and as shown, the plate 1 has an upstanding flange 7 providing a well in which brine flowing down the tubes collects and is drawn off. Stand pipes 4 extend upwardly from the tube plate and prevent leakage of brine into the tubes should one or other of these become holed below the brine level. The tube ends are clamped by tubular wedges 5 to the stand pipes 4. A seal between the tower wall and the tube plate may be provided by a flexible membrane 11. Alternatively a liquid seal may be provided (Fig. 2).
Patent GB-412786-A (GB)
Title: Improved combined safety razor blade hone and shoe horn
IPC: B24D15/08
Filed: 1933-08-08
Abstract: 412,786. Shoe-horns. WATSON, T., 145, Holden Street, North Fitzroy, Victoria, Australia. Aug. 8, 1933, No. 22168. Convention date, Aug. 8, 1932. [Class 17 (iii).] A combined hone for safety razor blades and shoe-horn consists of a metal sheet 7 having a non-corrodible concave surface 8 formed with grooves 9 and having a handle 11. The metal employed may be stainless steel, and the surface 8 may be plated with chromium or nickel, dull or polished. Specifications 338,346, [Class 60], and 361,142 are referred to. The Specification as open to inspection under Sect. 91 comprises also the provision of perforations in the concave surface 8, and no handle part 11 need be provided. This subject-matter does not appear in the Specification as accepted.
Patent GB-309564-A (GB)
Title: Improvements in heating, boiling, or baking apparatus
IPC: F24B1/00
Filed: 1928-07-31
Abstract: 309,564. Frister Akt.-Ges., R. April 13, 1928, [Convention date]. Heating and cooking vessels; lids.-A cooking appliance of the kind deriving top heat from an electric heating plate c provided in the cover b, comprises a tapered or stepped vessel a containing two or more vessels d, f, provided with preferably central sleeves or flues d<1>, f<1> and so arranged that the lower vessels can be fitted within the upper ones when required. A movable ventilator g is provided in the cover, a certain amount of ventilation of the container always proceeding by reason of the hollow rivet h.