baber/WOPTO huggingface dataset:
Patent GB-996937-A (GB)
Title: Improvements in or relating to lasers
IPC: H01S5/32
Filed: 1964-02-05
Abstract: 996,937. Lasers. INTERNATIONAL BUSINESS MACHINES CORPORATION. Feb. 5, 1964 [Feb. 21, 1963], No. 4814/64. Heading H3B. [Also in Division H1] An injection laser is produced by first cleaving a semi-conductor crystalline wafer along an edge plane of minimum bond strength to establish a reference plane, establishing a pattern on one surface of the wafer oriented relatively to the reference plane, diffusing an impurity in to the wafer surface in accordance with the pattern, and subsequently cleaving the wafer along a further plane which is parallel to the reference plane. The semiconductor wafer is cut from a parent crystal of gallium arsenide and is cleaved along the crystalline plane (110), Figure 4a, by a tool 46 to form the reference plane. As shown in Figure 4b, fine wires 49 are then positioned on the wafer orthogonal to the reference plane which mask strips of the wafer surface when a layer of silicon monoxide 48, Fig. 4c, is deposited by vacuum evaporation. After the wires are removed, the uncoated strips on the n-type semi-conductor surface provide regions where a p-type impurity vapour, such as zinc, is able to diffuse into the semi-conductor material to form the radiating junctions. The p-type region may be coated with an evaporated layer of indium to which an electrode may be attached. The bottom of the structure is then lapped so as to provide a required thickness, e.g. 5 mils. The group of semi-conductor devices are then separated into units by cutting between the p-type regions in the direction of arrow 50. Finally each unit is formed into the desired operational length by cleaving with a tool 54 along the 110 plane, Fig. 4b, the two parallel cleavage planes being inherently optically flat. An alternative method of forming the p-type regions is to cut a series of parallel grooves into the top surface of the wafer prior to vapour deposition of the p-type impurity. Subsequently the top surface is lapped down so that the diffused impurity remains only in the grooves. A coating may be placed over the top surface, or alternatively an epitaxial growth of gallium arsenide or other compatible material can be made on the upper surface prior to the lapping operation. A further method is to coat the crystal with silicon monoxide, and then with an etch resist which is selectively illuminated by the required pattern subsequent to etching. The diffusion operation then takes place. An alternative form of injection laser, Fig. 5 (not shown), has a cruciform p-type impurity zone formed by the process.
Patent GB-554400-A (GB)
Title: Improvements in insulated wire uuits and method of making same
IPC: H01B13/18
Filed: 1942-04-13
Abstract: 554,400. Electric cables. PLESSEY CO., Ltd. April 13, 1942, No. 4857. Convention date, July 10, 1941. [Class 36] The fibres at the ends only of a fibrous or stranded sheath of plastic insulation for an electric conductor are integrally bonded together. The fibres are thermo-plastic or adhesive, such as synthetic resin or cellulose acetate or fibre-forming polyamides. The bonding is produced by a heated tool such as a soldering iron 12, Fig. 2, which produces a ring 13 in insulation 11 of the wire 10. A pair of heated jaws may also be used. The fused part 13 is brittle and readily broken by bending the wire, one sleeve section being slid off and the remaining section moved along the wire to expose the wire at each end, as shown in Fig. 5.
Patent GB-853511-A (GB)
Title: Improvements in or relating to heat transfer systems
Inventor: BROWN ARTHUR JAMES
IPC: F28F1/36
Filed: 1949-02-22
Abstract: 853,511. Nuclear fuel elements. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Feb. 17, 1950 [Feb. 22, 1949], No. 4872/49. Class 39(4). A nuclear fuel element comprises a uranium rod 3 in an A1 sheath 4 having twelve helical fins 5 (only four are shown). The pitch of the helix is large compared with its diameter, and the diameter is small compared with the crosssection of the channel in which the element rests. The coolant is air.
Patent GB-691881-A (GB)
Title: Improvements in electric discharge lamps
IPC: H01J61/90
Filed: 1951-02-28
Abstract: 691,881. Discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd. Feb. 28, 1951 [March 22, 1950], No. 4881/51. Class 39(i) An electric discharge lamp has a thermionic emission cathode consisting of a tungsten helix 26 fitting tightly over a tungsten or tantalum wire 25 with a sliver of thorium metal 27 between helix and wire, and a surrounding sleeve 30 of quartz or other refractory insulating material. The quartz sleeve extends beyond the upper face of the electrode, and is secured to the support wire 25 by a spring clip 32. The lamp may have a rare gas filling, possibly with hydrogen; xenon at 600 mm. pressure is preferred. Initially a glow discharge occurs between cold electrodes, the cathode being heated to incandescence by ionic bombardment; a thin film of thorium diffuses on to the outer surface of helix 26, which thus becomes highly emissive. The lamp is designed to produce short pulses of high intensity brilliance, in connection with the transmission of motion picture films by television. The problem occurs of residual light between the actual pulses, due to the incandescence of the cathode, producing unwanted images during the intermittent movement of the film frames. In the above construction, the quartz sleeve 30 is rapidly rendered opaque by cathode sputtering, so that the residual light is shielded directly from the condensing lens system; accordingly, no shutter is required in connection with the pull-down mechanism for the film. Both electrodes may be made as described.
Patent GB-433382-A (GB)
Title: Improvements in or relating to traffic control signals
IPC: G08G1/08
Filed: 1934-02-14
Abstract: 433,382. Road signals for controlling traffic. AUTOMATIC ELECTRIC CO., Ltd., Strowger Works, Liverpool, and RENSHAW, A. P. B., Brookwood, Dickerage Road, Kingston Hill, Surrey. Feb. 14, 1934, No. 4901. [Class 118 (ii)] In a vehicle-operated traffic-control system the minimum time period is reduced if a vehicle is given right-of-way immediately. The invention is described as applied to the system described in Specification 403,732 and the Figure shows the alterations necessary to Figs. 3 and 4 of that Specification. Additional relays F and C are provided and an additional lamp FC having a higher striking voltage than FA. If a road pad (not shown), is operated whilst QA is charging, QA charges to the striking voltage of FA only and FA strikes. A energizes and the normal minimum green timing is given. If however, the condenser QA has been charging for some time before a pad is operated, QA charges to the striking voltage of FC so that when a pad is operated to transfer the right-of-way, both lamps FA and FC charge and relays A and C both energize. Relay F pulls up and connects the charging circuit of QA over low resistance YH so that QA charges quickly and the camshaft is stepped almost immediately through the initial interval to the vehicle interval. Cam contacts C8 open and F releases so that the vehicle interval is of normal duration.
Patent GB-276619-A (GB)
Title: Improvement in governor regulator
IPC: G05D13/00
Filed: 1927-02-21
Abstract: 276,619. Ingersoll - Rand Co., and Rathbun-Jones Engineering Co., (Assignees of Rathbun, E.). Aug. 26, 1926, [Convention date]. Centrifugal governors. - Means for regulating an engine driving an air compressor for the purpose of maintaining constant the pressure of air delivered by the compressor comprises a centrifugal governor R connected to the air and fuel valves T. U of the engine by a rod S and loaded by a spring d which abuts on the end of a piston a movable in a cylinder X. A pump &c. 0 supplies pressure oil through a pipe P to a regulating device K comprising a valve v connected to a diaphragm 4 which is exposed on the under side through a pipe L to the pressure in the delivery pipe G of the compressor. If the pressure falls below normal, the diaphragm pulls the valve v away from the end of the pipe P so that pressure oil may pass through a pipe Q into the upper part of the cylinder X and depress the piston a, thereby increasing the load on the governor R and allowing the engine to speed up until the air pressure in the pipe G is normal. The diaphragm 4 is balanced by a pair of adjustable weights 12, 13 on an arm 14 rotatably connected to a crank 20 on the crosshead 6 connecting the diaphragm to the valve.
Patent GB-137419-A (GB)
Title: A glazing cement for use in fireclay retorts and furnaces
IPC: C04B41/87
Filed: 1919-02-28
Abstract: 137,419. McMinn, S. A. Feb. 28, 1919. Refractory substances containing clay or silica and glass.-A mixture containing 30 per cent or more of powdered glass together with fire-clay, such as Stourbridge or China clay, or a clay containing over 90 per cent of silica, is used as a glazing-cement for lining retorts or furnaces. A mixture of China-clay with silica clay and ground glass in equal proportions may be employed.
Patent GB-1181928-A (GB)
Title: Curing Agents
IPC: C08G59/50
Filed: 1968-01-31
Abstract: 1,181,928. 4,4<SP>1</SP>-Methylene bis aniline derivatives. UNIROYAL Inc. 31 Jan., 1968 [28 March, 1967(3)], No. 5077/68. Heading C2C. [Also in Division C3] 4,4<SP>1</SP>-Methylene bis aniline derivatives of formula in which R<SP>1</SP> and R<SP>3</SP> are the same and are ethyl groups or secondary C 3 -C 6  alkyl groups and R<SP>3</SP> and R<SP>4</SP> are the same and represent methyl or ethyl groups or secondary C 3 -C 6  alkyl groups are prepared by condensing 2-substituted or 2,6-disubstituted anilines with formaldehyde in the presence of an acid catalyst using a molar ratio of substituted aniline to formaldehyde greater than 2 :1. Examples are given of the preparation of (a) 4,4<SP>1</SP>-methylene bis-(2-ethylaniline); (b) 4,4<SP>1</SP>-methylene bis-(2-isopropylaniline); (c) 4,41-methylene bis- (2-sec-butylaniline); (d) 4,4<SP>1</SP>-methylene bis-[2- (2-hexyl)-aniline]; (e) 4,4<SP>1</SP>-methylene bis-(2,6- diisopropylaniline); (f) 4,41-methylene bis-(2,6- di-sec-butylaniline); (g) 4,41-methylene bis- [2,6-di-(2-hexyl)-aniline]; (h) 4,4<SP>1</SP>-methylene bis-(2-sec-butyl-6-methylaniline); (j) 4,4<SP>1</SP>-methylene bis-(2-isopropyl-6-methylaniline); (k) 4,4<SP>1</SP>- methylene bis-(2-ethyl-6-methylaniline); and (1) 4,4<SP>1</SP>-methylene bis-[2-(2-hexyl)-6-methylaniline].
Patent GB-369348-A (GB)
Title: Improvements in the manufacture of electric discharge vessels
IPC: H01J9/40
Filed: 1931-02-19
Abstract: 369,348. Electric discharge tubes. M-O VALVE CO., Ltd., Marconi House, Strand, London, EDEN, C. G. and SMITHELLS, C. J., of General Electric Co., Wembley, Middlesex. Feb. 19, 1931, No. 5233. Drawings to Specification. [Class 39 (i).] The exhaustion of an electric discharge tube of the kind in which one of the metal electrodes forms a part of the envelope is effected through a metal tube attached to the metal electrode and coated internally with solder, and sealing is effected by compressing and heating the tube to cause the solder to melt and form a block in the tube and thereafter severing the tube beyond this block. The tube may be formed by drawing off the end of the metal electrode or may be a separate tube attached thereto by brazing. In an example the metal electrode is a cylindrical anode of copper and the tube is of copper coated internally with a layer of silver solder. The compressing and heating operations may be performed separately in either order or simultaneously.
Patent GB-414789-A (GB)
Title: Improvements relating to the manufacture of synthetic resin mouldings
IPC: B29C43/42
Filed: 1933-02-21
Abstract: 414,789. Moulding synthetic resins. COLE, Ltd., E. K., and HAHN, E., Ekco Works, Priory Crescent, Southend-on-Sea. Feb. 21, 1933, No. 5249. [Class 87 (ii).] An article of synthetic resin having one or more inlays is moulded by applying heat and pressure so as to produce a partlypolymerized body of one synthetic resin having in its surface one or more openings or recesses corresponding to the inlays and then introducing a second synthetic resin into the openings or recesses and again applying heat and pressure so as to complete polymerization of both the body and the inlays and to unite them together. The moulding may be effected in a die 9 having one or more relatively movable members 10, 11 which are adjusted to produce the openings during the first pressing operation with a die-member 14 and are then withdrawn to provide spaces for the second moulding material which forms the inlays. The resins used may have different rates of polymerization so that the second resin is completely polymerized in the time required to finish polymerization of the partly-polymerized first resin. The material used for the inlays may be of several different colours. The inlay may be a central portion within an outer annulus, or an intermediate annulus within a central portion and an outer annulus, and the space for the inlay may then be formed by an ejecting plunger or a relatively movable annular tool in a lower die member. The openings formed by the members 10, 11 may be connected by further openings so that, in the case of dies having parallel sides, the second material may fill all the openings as the member 14 moves down. The inlays may extend beyond the surface of the surrounding body and thus appear as overlays or form a backing for the body. Specification 390,609 is referred to.
Patent GB-1384901-A (GB)
Title: Method and device for photo-electrically scanning an object by  means of an optical beam
IPC: G01B11/02
Filed: 1972-02-04
Abstract: 1384901 Photo-electric scanning apparatus EXATEST MESSTECHNIK GmbH 4 Feb 1972 [4 Feb 1971] 5271/72 Addition to 1327065 Heading G1A In the method of the parent Specification 1327065 compensation for errors in measurement which may be introduced by the fact that selfradiating objects cool faster at their edges, is effected by regulating the amplitude of the signal due to the auxiliary beam. The output from the detector (which may be a photo-multiplier) is applied to a sample-hold circuit 514 which at a certain point in the scanning cycle is caused by a signal on 516 to hold the amplitude level from the detector. This held signal is chosen to be the plateau representing the auxiliary beam maximum. signal. A further hold circuit 518 is provided to use this level, since the circuit 514 reverts to sampling so that processing can continue as in the method of parent. The output of 518 is fed to a plate detector followed by the regulater stage, where the signal is compared with a pre-set reference signal to control the supply 524 to the detector so that the plateau signal is kept at a constant height.
Patent GB-904417-A (GB)
Title: Improvements relating to bulked yarns of synthetic polymers
IPC: D02G1/10
Filed: 1960-02-15
Abstract: The process of the parent Specification (wherein a bulked yarn comprising continuous synthetic filaments of highly crystalline high molecular weight polymers of alpha-olefines having the formula CH2=CHR in which R is an alkyl group is produced by stretching a continuous yarn of the filaments at 20 DEG -80 DEG C. with a stretching ratio of from 1:2,5 to 1:5,5 and at a feed rate of 30 to 150 metres per minute and subsequently subjecting the stretched yarn to a temperature of from 50 DEG C. up to the melting point of the filaments for from a few seconds up to 10 minutes) is modified in that filaments formed by melt spinning a mixture of polypropylene having a high content of isotactic structure with 1 to 20% by weight (based on the total weight of the mixture) of another polyolefine, an aromatic or aliphatic epoxy resin, a polyamide, a polyalkyleneimine, a polyester or a polyaminotriazole, are stretched at 20 DEG -110 DEG C. at the maximum draw rate permitted by their tensile strength, and in that the stretched filaments are then allowed to shrink for a period of a few seconds to 10 minutes at a temperature of from 50 DEG C. up to the melting point of the polymer mixture.  The filaments are preferably stretched in contact with a heated plate at a stretch ratio of from 1:2 to 1:5,5 and are preferably passed over one or more sharp edges, preferably after the stretching step.  The shrinking step is preferably effected in the presence of water vapour.  The feed rate may be 10 to 150 metres per minute.  In an example, filaments produced by melt spinning a mixture of 98% of polypropylene (of which 3 1/2 % is soluble in heptane) and 2% epoxy resin obtained by condensation of epichlorohydrin with "Bisphenol-A" is stretched at 22 DEG C. at a stretch ratio of 1:2,8 and then allowed to shrink in the presence of water vapour at 110 DEG C. for five minutes. Filaments according to the invention have permanent crimps randomly distributed along their lengths.
Patent GB-1537482-A (GB)
Title: Heat transfer apparatus
IPC: F28F13/00
Filed: 1975-02-07
Abstract: 1537482 Heat exchange systems EXXON RESEARCH & ENG CO 30 Jan 1976 [7 Feb 1975] 5305/75 Heading F4S [Also in Division H5] A method for constructing an arrangement for heat transfer between a conduit or vessel 2 and a heating or cooling element 1 (which may be an electric heating element or a tube conveying a heating or cooling fluid) comprises emplacing heat transfer material 3 in a mouldable or plastic state between and in contact with both the element 1 and the conduit or vessel 2, and thereafter applying a relatively rigid recessed retaining member 4 around the heat transfer material so that the edges 5 of said member 4 abut the surface of the conduit or vessel 2 to maintain the coherance and continuity of the heat transfer material, and securing (e.g. by clips, straps, wires or U-bolts) the member 4 to the conduit or vessel 2. Alternative methods of initially applying the heat transfer material (i.e. before positioning the member 4) comprise (a) emplacing the heat transfer material in a mouldable or plastic state between and in contact with the conduit or vessel 2 and the element 1, and so that the element 1 is surrounded by said material, and (b) applying heat transfer material to the surface of the conduit or vessel 2, pressing the element 1 towards said surface so that it is partially embedded in the heat transfer material, and applying further heat transfer material so as to surround the surface of the element 1. At least one transverse baffle may extend across the interior of the retaining member 4 to inhibit lengthwise movement of the heat transfer material.
Patent GB-897350-A (GB)
Title: Improvements in or relating to a metal partition-wall, curtain wall, or like wall construction
IPC: E06B7/23
Filed: 1960-02-16
Abstract: 897,350. Weather seals; curtain walls and partitions. ACHAT, VENTES REPRESTATlONS S.A. Feb. 16, 1960 [Dec. 10, 1959], No. 5395/60. Classes 20(3) and 20(4) A metal partition, curtain wall, or the like wall construction comprises two separate mutually perpendicular parts one of which has two parallel flat surfaces 1A, 1B integrally connected by a transverse part 2 to form a U-shaped channel, a sealing cord or strip 4 for synthetic material in the channel and the other part 6 in contact with the top of the channel short limb to form a tubular enclosure with the sealing element in contact with all inner faces.
Patent GB-953526-A (GB)
Title: Improvements in or relating to electronic timing circuit arrangements
IPC: H03K3/284
Filed: 1963-02-11
Abstract: 953,526. Semi-conductor devices. ALBISWERK ZURICH A.G. Feb. 11, 1963 [Feb. 9, 1962], No. 5896/63. Heading H3T. A variable timing circuit comprises a first transistor H1 with a resistor R5 and a capacitor C2 in series across the collector and emitter, a second transistor H2 with its base connected to the junction between the resistor R5 and capacitor C2 and its collector connected to the base of the first transistor H1, to form a monostable device. A third transistor H3 has its emitter connected to the emitter of the second transistor to compensate for temperature variations in its characteristic. The circuit is such that when a trigger pulse is.applied to the collector of the first transistor H1, it conducts and transistor H2 is cut off for a time, dependent on the values of resistor R5 and capacitor C2, the value of the capacitor or the resistor being variable.
Patent GB-553094-A (GB)
Title: Improvements in and relating to gyroscopic apparatus
IPC: G01C19/38
Filed: 1941-04-26
Abstract: 553,094. Gyroscopic apparatus. SPERRY GYROSCOPE CO., Inc. April 26, 1941, No. 5427. Convention date, April 26, 1940. [Class 97 (iii)] In gyroscopic apparatus, and more particularly air-borne gyroscopic compasses, a member (which may contain the sensitive element) is supported by shock or anti-vibration means through which an air stream to the member (or sensitive element) passes. The compass is supported from an inner gimbal ring 3, Fig. 3, by means of rubber diaphragms 5 connected by tubes 12. Air pumped through channels in the gimbal rings passes through the tubes 12 and is led by pipes 13 into a lower extension 14 of the compass housing 7 and thence to the spherical bearing surfaces 21, 24 of the vertical ring 20. Air also passes to spherical bearings 26, 27 containing the three-part rotor casing 25, 65, 251, angular movement of the casing about all axes except the horizontal being suppressed as described in Specification 606,334 by an air bearing 34, 35 surrounding a hollow stem 32 projecting from one side of the rotor casing. The bearings 34, 35 are united by a ring 40 connected to the vertical ring by a flexible diaphragm 41 thus giving selfaligning support to the bearings. Air for spinning the rotor passes through driving nozzles 43. The compass is damped as described in Specification 606,335, by means of air jets controlled by an air supported pendulum 44 mounted on the hollow stem 32 and dipping into an oil container 47 attached to the rotor casing. The air within the rotor casing is discharged through a cylindrical extension diametrically opposite the hollow stem 32 and thence through a grill 158. By pushing in a knob 59 secured to the rotor casing a torque may be exerted about an horizontal axis to reset the compass quickly in azemuth. Gravitational control is furnished by glass liquidcontainers connected at the top and bottom by small bore glass tubing and containing a heavy mobile liquid such as methylene iodide. An adjustable throttle valve is provided in the lower glass tube. All parts of the compass, with the possible exception of the ball bearings of the rotor shaft may be constructed of non-magnetic material to avoid disturbance of adjacent magnetic compasses.
Patent GB-435688-A (GB)
Title: Improvements in or relating to cupboards or cabinets, and more particularly filing cabinets
IPC: A47B63/00
Filed: 1935-02-20
Abstract: 435,688. Sliding shelves. KORNHASS, W., (trading as EKAWERKE KORNHASS & SOHNE), Friedrichsroda, Thuringia, Germany. Feb. 20, 1935, No. 5445. Convention date, Feb. 27, 1934. [Class 52 (i)] Plywood shelves are stiffened by turning up the rear edge d and turning the front edge e upwardly or downwardly. The edges of the shelf slide in slots b cut in the plywood lining of the cabinet.
Patent GB-370580-A (GB)
Title: Improvements in reciprocating dispensing pumps
IPC: B05B9/043
Filed: 1931-02-20
Abstract: 370,580. Liquid-dispensing pumps. DA COST A, L. L., 2601, Faragut Road, Brooklyn, New York, U.S.A. Feb. 20, 1931, No. 5468. [Class 102 (i).] A reciprocating pump for dispensing measured quantities of liquids comprises a cylinder 2 with a suction inlet 6, provided with a disc valve 9, positioned midway along the cylinder. The discharge outlet 25 is provided with a non- return valve 27. The plunger 17 is hand operated and returned by a spring 13 and a cushion of air is maintained between the plunger and the liquid. The stroke of the plunger is limited so that it does not contact with the wet cylinder surface. An aperture 12 is covered by a washer 21 secured to the plunger to prevent loss of air from the cushion.