baber/WOPTO huggingface dataset:
Patent GB-1157719-A (GB)
Title: Controlled Semiconductive Rectifier Assembly
IPC: H01L29/00
Filed: 1968-01-12
Abstract: 1,157,719. Semi-conductor devices. WESTINGHOUSE ELECTRIC CORP. 12 Jan., 1968 [27 Jan., 1967], No. 1880/68. Heading H1K. [Also in Division H3] An SCR assembly comprises two complementary transistors, the base and collector of one being connected to the collector and base respectively of the other, one of the transistors having an equivalent rectifier connected directly between its emitter and base regions so that the apparent common-emitter current gain of the combination of the transistor and the rectifier is less than unity. The arrangement provides a device with appreciable turn-off gain. As shown, Fig. 1, the PNP transistor is constructed so that over the major portion of the base region 16 no transistor action occurs, this portion constituting the equivalent rectifier. This results in the transistor having a common-emitter current gain of less than unity. The NPN transistor is connected to the PNP transistor by means of ohmic contacts 30, 32. The product of the current gains of the transistors is greater than unity. When the device is switched on by a voltage applied to the gate terminal the bulk of the load current flows through the base circuit of the PNP transistor rather than through the collector circuit due to its low current gain. The device can be switched off by withdrawing current from the gate terminal to prevent the collector current of the PNP transistor from flowing into the base of the NPN transistor. The PNP transistor 10 may be produced by diffusing an N-type impurity into the lower face of a P-type silicon wafer to form the base region and then masking and diffusing-in a P-type impurity to form a small-area collector region. The NPN transistor 12 may be produced by diffusing a P-type impurity into the upper face of an N-type silicon wafer to form the base region and then masking and diffusing-in an N-type impurity to form a large-area collector region. The ohmic contacts 30, 32 may be of silver.
Patent GB-714757-A (GB)
Title: Improvements in and relating to multicolour printing process and apparatus
IPC: D06P5/00
Filed: 1951-01-25
Abstract: 714,757. Radio-active compositions. MEITN'ER, W. Feb. 12, 1952 [Jan. 25, 1951], No. 1901/51. Class 1 (1) [Also in Group XVI] In a multicolour printing process in which colours are applied in succession to the material being printed and wherein contamination of one colour by a preceding colour is likely to occur, the preceding colour is made radio-active and means are provided for detecting radioactivity of the colour liable to contamination. Sodium or ammonium phosphate containing radioactive phosphorous may be added to the colour for this purpose.
Patent GB-325358-A (GB)
Title: Improvements in and relating to means for testing the durability and hardness of tiles and other flooring material and the like
IPC: G01N3/56
Filed: 1929-01-21
Abstract: 325,358. Lyons & Co., Ltd., J., Lampitt, L. H., and Bilham, P. L. Jan. 21, 1929. Testing durability and hardness of materials.- Apparatus for testing the wearing qualities o tiles, wood-blocks. rubber mats, linoleum and similar floor coverings comprises means for apply ing a tapping or abrading action or both to the specimen. A base 1 has side plates 2 which ir turn support a table 3 provided with grooves 4 to receive the securing bolts of clamps 5 for the specimen 21. Under the table is a motor 6 driving through a worm reduction gear 7 a shaft 8 from which the drive is transmitted to a shaf 12 feathered on which are two cams 13, 14 which may or may not be formed in one. The inne: cam is adapted to impart movement to a rod 15 which in turn raises a beam 16 mounted on a pivot 17 and pulled downwards by tensioned springs 18. The beam 16 is provided with a hammer head 19 having a hardened point 20. The shape of the cam 14 is such that the beam is raised and suddenly dropped, the tile 21 receiving a sequence of blows. The number of taps per minute and the time taken to produce an indentation is a measure of the hardness. 'The tension of the springs 18 and the weight of the hammer head may be altered to vary the strength of a blow. For abrasive tests, a carrier 22 is attached to the hammer head having a spring pad 23 to which abrasive elements can be secured. The specimen is held by clamps 25 against a holder 26 and the cam 13 which gives a simple reciprocating action to the beam 16 is used. The loss of weight of the specimen in unit time per unit area affords a measure of the wearing property.
Patent GB-590520-A (GB)
Title: Indirectly-heated cathode structures for electron discharge devices
IPC: H01J1/20
Filed: 1945-01-26
Abstract: 590,520. Thermionic cathodes. STANDARD TELEPHONES & CABLES, Ltd. Jan. 26, 1945, No. 2090. Convention date, Jan. 31, 1944, [Class 39 (iii)] [Also in Group XL] An indirectly heated cathode for an electron discharge device comprises an insulating plate 28, Fig. 2, having an integral upturned ring 56 to which a metal disc 26, Fig. 3, carrying the emissive layer is secured, a heating coil 30, 32, in the form of a double spiral secured in the hollow enclosure thus formed out of contact with the metal disc 26, and two current supply leads for the coil connected one to both ends of the coil and the other to its mid-point, the cathode structure being supported by means of its lead-wires from an insulating seal at the base of the discharge device, Fig. 1 (not shown). The heater coil 30, 32 may be embedded in the insulating plate 28 and is preferably wound more closely near the periphery of the disc 28 than at the centre thereof, as shown in Fig. 2. In a modification, Figs. 6, 7 (not shown) the heating coil is supported above the surface of the insulating plate by means of a plurality of wire "pigtails." In a further modification, Fig. 4, the insulating plate 128 is provided with a plurality of radially extending ribs 158 integral therewith having arcuate notches 160 which serve to hold the heating coil 30, 32 in position. The upper surface of the insulating plate may be coated with heat reflecting material, e.g., magnesium oxide, so as to concentrate the heat on the metal disc 26.
Patent GB-1073249-A (GB)
Title: Improvements in or relating to anion exchange resins
IPC: C08F8/00
Filed: 1965-01-18
Abstract: Weak-base anion exchange resins are prepared by reacting a polyvinyl halide resin with ammonia or an aliphatic amine in an aqueous medium at a temperature of 110 DEG  to 200 DEG  C. Specified resins are polyvinyl chloride, bromide and iodide.  Specified amines are methylamine, dimethylamine, ethylenediamine, diethylenetriamine, triethylenetetramine and bis(hexamethylene)triamine. The properties of the resins may be improved by reacting with poly-functional reagents containing at least two amine-reactive groups, e.g. diepoxybutane, halohydrins, dihaloalkanes, dihaloalkyl ethers and xylylene dihalides.  In examples polyvinyl chloride is reacted with (1) diethylenetriamine, (2) diethylenetriamine and epichlorohydrin, (3) methylamine, (4) dimethylamine, (5) diethylenetriamine and (6) bis(hexamethylene)triamine.
Patent GB-489840-A (GB)
Title: A directional indicator for use on bicyclesí¬tricyclesí¬motor bicycles and like vehicles which are guided by hand
IPC: B62J6/00
Filed: 1938-01-22
Abstract: 489,840. Traffic signals on vehicles. FETCH, J., and ADAMS, A. Jan. 22, 1938, No. 2161. [Class 118 (ii)] A direction indicator for cycles &c. consists of an arm rigid with the handle-bar grip and adapted to be illuminated automatically when turned. The arm F is hollow to contain a dry battery B and is carried by a rotatable insulating shell C formed in one with a hand grip adapted to be slipped on the handle bar A and retained by a screw K passing through a slot in the shell and through a cam-ring E. A lamp G carried by the arm makes connection with the battery through a spring J, the other terminal of the battery engaging the cam ring. When the grip is rotated therefore the battery casing spring F<1> engages the high part of the cam and so completes the circuit to the lamp.
Patent GB-620799-A (GB)
Title: Improvements in or connected with money boxes
IPC: A45C1/12
Filed: 1947-01-24
Abstract: 620,799. Money - boxes. P E R M U T A (PLASTICS), Ltd., P. A., and ASTRUCK, P. Jan. 24, 1947, No. 2215. [Class 18] A money-box 1, simulating a police or telephone box, has an electric light bulb in the roof 3, a slot for insertion of coins in the front wall of the box, and a coin shute. The two side plates 24, 25 of the shute are electrically insulated from each other, and are connected to the two poles 20, 21 of the battery 22, connections from the plate 24 going through the bulb holder 16 to the pole 20, and from plate 25 to the pole 19. The electric circuit is completed by a coin rolling down the shute.
Patent GB-749799-A (GB)
Title: A process for the manufacture of organosilanes
IPC: C07F7/12
Filed: 1954-01-25
Abstract: Methylchlorosilanes are prepared by heating with hydrogen chloride, at a temperature of 200 DEG  to 900 DEG  C., the residue boiling above dimethyldichlorosilane, which residue is formed during the reaction of methyl chloride with silicon, the amount of HCl present being at least 4 per cent by weight of the residue. Pressures may be normal or above atmospheric.  The process may be batchwise, or continuous, in which the reactants are passed through a hot tube which may contain inert or catalytic packing, e.g. quartz, or activated alumina or silica-alumina.  The residue used is a complex mixture of a large number of chlorine-containing silanes, disilanes, disiloxanes, silmethylene and silethylene compounds and other polymeric compounds.  In the reaction, the SiSi, SiCSi, SiOSi and the higher alkyl groups are cracked to give methylchlorosilanes having only one Si atom in the molecule. Specifications 375,667, [Group XVII, 375,668, [Group XXVII], 375,669, [Group XL], 375,673, 375,674, [Group XXIII], and 685,656 are referred to.ALSO:Silicon tetrachloride is produced as a byproduct in the preparation of methylchlorosilanes in which the residue from the reaction between methyl chloride and silicon, which boils above dimethyldichlorosilane, is heated with hydrochloric acid at a temperature of 200 DEG C. to 900 DEG C., the amount of HCl being at least 4 per cent by weight of the residue. Pressures may be normal or above atmospheric.  The process may be batchwise, or continuous, in which the reactants are passed through a hot tube which may contain inert or catalytic packing, e.g. quartz or activated alumina or silica-alumina.  The residue used is a complex mixture of chlorine-containing silanes, disilanes, disiloxanes, silmethylene and silethylene compounds and other polymeric compounds. In the examples, the percentage of silicon tetrachloride in the reaction products ranges from 4.2 to 13.5. Specifications 375,667 [Group XVII], 375,668 [Group XXVII], 375,669 [Group XL], 375,673, 375,674 [both in Group XXIII] and 685,656 are referred to.
Patent GB-1212914-A (GB)
Title: Thermosetting compositions comprising blends of acetal resins and amine aldehyde resins
IPC: B05D5/08
Filed: 1968-01-15
Abstract: 1,212,914. Thermoset coatings. INMONT CORP. 15 Jan., 1968, No. 2224/68. Heading B2E. [Also in Division C3] A thermosetting composition for coating wood products, plastics, glass and metals comprises a polyacetal resin and an amine-aldehyde resin. The polyacetal resin is a reaction product of formaldehyde, acetaldehyde, propionaldehyde or butyraldehyde with a polyhydric alcohol selected from glycerine, trimethylol-ethane and propane, pentaerythritol, dipentaerythritol, sorbitol, erythritol and 1, 2, 6-hexanetriol. A higher fatty acid may also be incorporated in the reaction mixture. The amine-aldehyde resin is a reaction product of any of the above aldehydes with urea, biuret, dicyandiamide, melamine, ammeline, substituted melamines and benzoguanamine. The composition also preferably includes an acid to catalyse the reaction between the two resins. The proportions are preferably 50-90% by weight of polyacetal to 10-50% of amino resin. The blend may comprise a solvent, e.g. xylene or butanol-xylene mixture. After application to a surface, exemplified by steel panels, the mixture is baked at 100‹C to provide a hard film.
Patent GB-394740-A (GB)
Title: Improvements in or relating to electric circuit breakers having arc-rupturing devices
IPC: H01H9/34
Filed: 1932-01-25
Abstract: 394,740. Arc-rupturing in switches. WESTINGHOUSE ELECTRIC & MANUFACTURING CO., East Pittsburg, U.S.A.- (Assignees of Slepian, J.; 1115, Lancaster Street, Wilkinsburg, Pennsylvania, U.S.A.) Jan. 25, 1932, No. 2235. Convention date, Jan. 26, 1931. Addition to 388,175. [Class 38 (v).] The magnetic plates of the parent Specification are provided with a magnetizing winding 87 comprising a conducting bar 89 extending through the conducting plates and enclosed in a tube 91 of the material known under the registered Trade Mark "Micarta," and a bar 93 enclosed in a similar tube 95, layers of tinfoil 92, 94 being embedded in the tubes to equalize dielectric stresses on their insulation. The current path from conductor 17 is by way of conductors 99, 89, 97, 93, 101 to the part 103 of the magnetic arc horn 27, the directions of current being, as shown on the drawing, such that the arc is attracted more strongly to the lower side of the conductor 89 about which the arc sections are rotated by the magnetic coils in sections 33.
Patent GB-754445-A (GB)
Title: Improvements relating to drawing apparatus
IPC: B43L13/02
Filed: 1954-01-26
Abstract: 754,445. Draughting-machines. ROFF, P. J. (Lehsten, S.). Jan. 26, 1955 [Jan. 26, 1954], No. 2261/54. Class 97 (3). Drawing apparatus comprises a supporting frame including an elongated frame member extending from top to bottom of a drawing board and having at one end a wheeled carriage which travels along a straight guide rail itself secured to an edge of the drawing board, a vertical guide rail secured to said carriage so as to be permanently at right-angles to the path of travel of the carriage and a scale-carrying member slidably mounted upon the vertical guide rail, the scale carrying member having mounted thereon a protractor head and means for attaching linear scales thereto. A hollow member 10, extending slightly obliquely across a drawing-board, is fixed at its end to a large bracket 11 and a smaller bracket 12. Bracket 11 carries grooved rollers 16 which engage a horizontal guide-rail 17 fixed at the top of the drawing board. The bracket 12 has an extension 13 carrying a roller 14 which slides along the bottom of the drawing board or an extension thereof. Brackets 11 and 12 are joined by a vertical guide-rail 18 of oval section which extends at right angles to the direction of movement of the bracket 11. A carriage 19 mounted on rail 18 has cylindrical rollers 20 engaging the underside of rail 17, and a friction brake 31 whereby the assembly can be locked in any position along the horizontal guide rail 17. A scale carrying member 32 has grooved rollers 33 engaging the vertical rail 18. A flat plate 37 is pivoted at 39 to plate 32, and is also pivoted at 41 to a link 40 which is connected to an eccentric 43 mounted on a plate 32, so that the plate 37 can be adjusted. A knob 51 is journalled in plate 37 and carries the arms 47, 48 carrying the scales, which can be set in positions differing by 15 per cent by means of a notch plate (not shown) engaged by a pawl. The scales may be held in intermediate position by a friction brake operating when the pawl is held out of engagement. Plate 32 is normally locked in position along the rail 18 by a friction brake which may be released by operation of lever 36. A cord 62 is connected to plate 32 through a spring 65, passes over pulleys 63 mounted in housings 64 on the bracket 11, and then passes to a counterweight 61 sliding in the tube 10.
Patent GB-269690-A (GB)
Title: Improvements in or relating to devices for the prevention of skidding of wheel tyres
IPC: B60C11/18
Filed: 1926-01-26
Abstract: 269,690. Techno-Chemical Laboratories, Ltd., and Gram, T. Jan. 26, 1926. Slipping-preventing attachments to wheels. - To prevent side-slip, a ring a. formed in one piece or in connected segments, is fitted at one side of the tyre, the ring being formed of flexible material with fabric insertions b and a facing d of soft material such as sponge rubber. As shown, the band tapers towards the rim where its edge may be clamped between the tyre bead and the rim flange. The inner portion of the band may be secured to the tyre by cold vulcanization or by springs.
Patent GB-117231-A (GB)
Title: Improvements in and relating to Microphones.
Inventor: HACKETT PAUL JAY
IPC: H04R21/02
Filed: 1918-02-08
Abstract: 117,231. Hackett, P. J. Feb. 8, 1918. Microphones.-A microphone cell 2, closed by a mica diaphragm 7 held in position by a clamp ring 9 is provided with a packing-ring 11 of fluffy asbestos. The ring 11 is held in position by a few shreds of the asbestos held between the edge of the cell 2 and the diaphragm 7.
Patent GB-192401-A (GB)
Title: Improvements in or relating to moisture indicating and recording in paper making machines and the like
IPC: G01N25/62
Filed: 1923-01-25
Abstract: 192,401. Witham, G. S. Jan. 26, 1922, [Convention date]. Indicating, recording, and registering apparatus; drying.-Apparatus for indicating and recording the humidity and temperature of paper in the paper machine during drying comprises wet and dry bulbs 7, 6, Fig. 2, arranged side by side in a pan 1 mounted to traverse across the web along a screw, which may be hand or motor operated. The tubes of the wet bulb 7, Fig. 4, are surrounded by a wick extending through a slot in the pan and dipping in a reservoir 2 supplied with water. A perforated pipe 12 supplies a current of air at the face of the web to be tested, and a plate 3 catches fuzz scraped off the paper by the scraper 46. The bulbs are connected by flexible tubes to recording mechanism 10, Fig. 9, of known type having pointers 49, 50 indicating the humidity and temperature respectively. The screw traverse may be dispensed with, the pan 1 being slid along a cylindrical reservoir slotted to receive the wick, and a clamp being provided to secure the apparatus in position. The pointers 49, 50 may be coupled together, the mean between the temperature curve and the humidity curve being thus traced.
Patent GB-754535-A (GB)
Title: A safety control circuit for travelling platform conveyors
IPC: B65G35/00
Filed: 1954-01-26
Abstract: 754,535. Endless articulated platform conveyers. LICENTIA PATENT - VERWALTUNGS GES. Jan. 26, 1954 [Jan. 28, 1953 ; Aug. 17, 1953], No. 2345/54. Classes 78 (1) and 104 (2). A travelling articulated platform structure running on an endless track passes over a succession of spaced drive units, e.g. compressed air motors (not shown) which are automatically put into and out of operation as the platform structure approaches and leaves the drive unit, respectively, by electric relays controlled by track switches. To prevent the platform structure running into a stationary drive unit in the event of one of the relays not functioning, a normally closed contact s1 ... s5 of each relay is in circuit with a common time delay relay ZR which upon operations opens contacts Z1 to disconnect all the relays and illuminate a lamp SL. Track switches Eo1 ... Eo6 are placed in the upper run of the track and track switches Eu1 ... Eu6 in the lower run so arranged that each succeeding switch is closed by the platform before the preceding switch has been released by the platform. Each switch operates two of the relays via energizing coils S1-S5, the relays when operated closing contacts (not shown) to operate the drive units which the platform is leaving and approaching, respectively, at the time the switch is operated. At the same time, these relays open their contacts s1 ... s5 preventing relay ZR from being operated under normal conditions. To avoid current flowing past a contact s1 ... s5 into the conductor L during the brief interval between closing of a switch Eo1 ... Eo6 or Eu1 ... Eu6 and the operation of the appropriate contactor and operating the coils S1 ... S5 of the remaining contactors, rectifiers (not shown) are preferably inserted in each of the conductors between contacts s1 ... s5 and the conductor L allowing current to flow only into conductor L and through the relay ZR. In a modification where the drive units are switched on directly by the switches Eo1 ... Eo6, Eu1 ... Eu6 the contacts s1 ... s5 are opened centrifugally when the respective motors reach a predetermined speed, thus preventing the platform running into a drive unit not running at the correct speed. Reference has been directed by the Comptroller to Specification 698,639.
Patent GB-979914-A (GB)
Title: Improvements in or relating to preparations for the prolongation of clotting time of blood
Filed: 1963-01-18
Abstract: An anti-thromboplastic phosphatide is prepared by extracting a soybean phosphatide concentrate with acetone and anhydrous denatured ethyl alcohol, dissolving the residue in chloroform, pouring the solution into acetone, and heating the precipitate so obtained at 70 DEG C. for two weeks.  The product is used in pharmaceutical preparations for prolonging blood clotting time (see Division A5).ALSO:A preparation for the prolongation of blood clotting time comprises heparin and an anticoagulant phospholipid, e.g. a liver phospholipid or a soybean phosphatide.  The preparation may be administered parenterally, or the heparin and phospholipid may be administered separately and successively by the parenteral route, or the heparin may be administered parenterally and the phospholipid orally.
Patent GB-925541-A (GB)
Title: Improvements in or relating to ultrasonic flowmeters
Inventor: LAKE DAVID BRIAN
IPC: G01F1/66
Filed: 1959-01-22
Abstract: 925,541. Ultrasonic fluid-flow meters. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Jan. 8, 1960 [Jan. 22, 1959], No. 2492/59. Class 40 (7). In improvements of a known Doppler-effect ultrasonic fluid-flow meter, Fig. 1 (not shown), the transducers 3, 25, Fig. 2, are coupled to the fluid by a material 1 having a temperature coefficient of sound velocity, A, less than the A-value of the fluid; or a single transducer 23, Fig. 3, is utilized and is coupled to the fluid via a liquid 21 having a negligible A-value and an insert 24 having a low sound velocity but not necessarily a low A-value. Insert 24 may be of polystyrene or tin, and liquid 21 may be a 17% solution by weight of ethyl alcohol in water. A mathematical treatment is given. Specification 855,650 is referred to.