baber/WOPTO huggingface dataset:
Patent GB-1525751-A (GB)
Title: Amplifiers
IPC: H03F3/20
Filed: 1975-09-04
Abstract: 1525751 Transistor amplifiers NIPPON GAKKI SEIZO KK 4 Sept 1975 [6 Sept 1974] 36525/75 Heading H3T An amplifier for low distortion, e.g. a Class B power amplifier, comprises first and second driver stages Tr21, 22 and Tr23, 24 respectively, and an output stage Tr25, 26, each driver stage including two complementary transistors with their control electrodes fed in parallel, their second electrodes connected to the control electrode of a respective output transistor Tr25 or 26, and their third electrodes respectively supplied from terminals +B1, -B1, the output transistors Tr25, 26 being complementary and feeding in parallel an output terminal of the amplifier. Biasing voltages for the control electrodes of Tr21-24 are provided by the networks E1-4, VR8 being for bias voltage adjustment. The input signal is applied to Tr54 which forms an emitter-coupled pair with Tr55, the latter receiving negative feedback from the amplifier output terminal via a network R101, R102, C88. The output from Tr54, 55 is applied to differential stage Tr52, 53, the outputs being taken from the collector circuit of Tr53 on each side of the network El, E2. Tr50, D51 provide constant current for the biasing networks and for Tr52, 53. In another embodiment complementary F.E.T.'s (Q21, Q22), Fig. 9 (not shown), feed an output F.E.T. (Q25). Stabilized biasing voltages for the F.E.T.'s are provided by the drops across resistors (R59, R60) in series with constant current transistors (Tr33, Tr34). A variable resistance (VR2) is included to adjust the bias. Circuits of the invention are stated to have the advantage over prior art, as exemplified by Fig. 1 (not shown), that they are substantially free from distortion caused by gate capacitance of the output transistors.
Patent GB-847760-A (GB)
Title: Tension wire anchoring device for prestressed concrete pipes
Inventor: KELL WALDO RALPH
IPC: E04C5/12
Filed: 1958-11-17
Abstract: 847,760. Casting reinforced concrete pipes. CEN-VI-RO PIPE CORPORATION. Nov. 17, 1958, No. 36874/58. Class 87(2). [Also in Group XXVIII] An anchoring device, to maintain tension in a concrete reinforcement prestressing wire 11, during the casting of a concrete pipe, comprises a block 17 in which is a pocket 27 with an end wall 22 slotted at 25 to receive the wire, and which is secured to the mould by bolts screwed into lugs 31, 32, and a sleeve 40 received in the pocket when attached to the wire whereby the wire is anchored. The sleeve has a porcelain lining which fractures when the sleeve is gripped to form a tight connection. An extension 29 inclines from the body so that it, and an enlargement 30 thereon, are wholly embedded in the concrete. The inside of the end wall 22 is sloped so that the sleeve 40 is forced to the bottom of the pocket. A depression 37<SP>1</SP> for the wire may be cored into the concrete.
Patent GB-1007275-A (GB)
Title: Improvements in or relating to fuel cell electrodes
IPC: H01M4/86
Filed: 1961-10-13
Abstract: 1,007,275. Fuel cells. LEESONA CORPORATION. Oct. 13, 1961 [Dec. 15, 1960], No. 36905/61. Heading H1B. An electrode prepared by heat-treating an ion-exchanged zeolite as in Specification 975,314 (Division H1), has a polymer layer formed on it.
Patent GB-892938-A (GB)
Title: Improvements in hammer mills
IPC: B02C13/20
Filed: 1960-10-28
Abstract: 892,938. Hammer mills. PRVNI BRNENSKA STROJIRNA, ZARODY KLEMENTA GOTTWALDA NARODNI PODNIK. Oct. 28, 1960 [Oct. 31, 1959], No. 37207/60. Class 59. A hammer mill comprises two sets of hammers 4, 5. The material to be ground is introduced to the intake side of the hammers 5 together with the smalls from a classifier 11. The hammer shafts are driven by a single electric motor and exchangeable belt pulleys.
Patent GB-924084-A (GB)
Title: Electrical number checking apparatus
IPC: G06F11/10
Filed: 1959-11-03
Abstract: 924,084. Electric calculating - apparatus. NATIONAL CASH REGISTER CO. Nov. 3, 1959 [Nov. 13, 1958], No. 37244/59. Drawings to Specification. Class 106 (1). Account numbers arranged so as to conform with an arithmetical test are checked for conformity when set up on the keyboard of an accounting machine before the machine can operate. Denominational places are given different weightings and the sum of the weighted digits of the account number when added to a check digit also entered into the machine should be divisible by 10 or other predetermined modulus. In the example described, the odd denominations have a weight of 1 and the even denominations 2. When the appropriate keys have been depressed and the motor bar operated the digits in the even denominations are scanned and added into a bi-quinary register. The digits in the odd denominations are then added into the register and finally a second scan of the even denominations is effected. At the end of the accumulation the machine is released for operation if the test has been passed. On the other hand, failure brings up an alarm. The circuit elements are of known type comprising magnetic cores of rectangular hysteresis loop with transistor amplifiers.
Patent GB-1248847-A (GB)
Title: Improvements in or relating to polyesters
IPC: C08F8/28
Filed: 1969-07-24
Abstract: 1,248,847. Coatings. CHEMISCHE WERKE ALBERT. 24 July, 1969 [27 July, 1968], No. 37357/69. Heading B2E. [Also in Division C3] Substrates are coated with compositions containing thermosetting resins which are prepared by copolymerising (a) a mono- or dibasic α, #-olefinically unsaturated carboxylic acid (b) a neutral ester or an ester containing hydroxy groups of (a) with a mono- or polyhydric alcohol having 1 to 18 carbon atoms and (c) a copolymerisable monomer which does not contain hydroxyl groups and, during or after the copolymerisation reaction, reacting at least 25% of the carboxyl groups of component (a) with cyanamide to yield a product having an acid member of at least 5, the acid member of the material which has not been reacted with cyanamide having been reduced by at least 10 as compared to the starting mixture of components (a), (b) and (c) and thereafter reacting the copolymer obtained with an aldehyde. In the Examples a metal substrates are coated.
Patent GB-346745-A (GB)
Title: Improvements in and connected with electrode rod or wire holders for electric welding
IPC: B23K9/28
Filed: 1929-12-07
Abstract: 346,745. Holding-tools. SHIRLEY, J., 18, St. Lawrence Street, and PATERSON, J., 13, Hamilton Street, both in Greenock, Renfrewshire, and PREMIER ELECTRIC WELDING CO., Ltd., Imperial Chemical House, Millbank, London. Dec. 7, 1929, No. 37556. [Class 61 (ii).] An arc welding electrode passes through apertures 6 in a screwed cap 2 and is gripped between the head of the cap and a steel ball 7. The cap engages the screwed end of an insulated steel spindle 1 and is locked in position by a spiral spring 3 abutting the handguard 4.
Patent GB-892545-A (GB)
Title: Filament support for an electric lamp or similar device
IPC: H01K1/24
Filed: 1960-11-02
Abstract: 892,545. Supporting filaments in lamps; electric heating filaments. WESTINGHOUSE ELECTRIC CORPORATION. Nov. 2, 1960 [Dec. 24, 1959], No. 37687/60. Classes 39(2) and 39(3) In an electrical device such as a lamp, a coiled filament of refractory wire is supported by a member of refractory material having an opening extending inwards from the periphery which is inserted between adjacent turns of the filament so that part of one turn passes through the opening, the support member having a thickness greater than the spacing between the turns. The difference between the thickness of the member and the spacing between the turns is preferably sufficient for the member to remain gripped by the turns when the filament is mounted under tension. Fig. 1 shows a heat lamp comprising a quartz envelope 12 closed at each end by a press seal 17 and containing a coiled filament 14, e.g. of tungsten mounted between lead-in conductors 16 embedded in the seals 17 and connected by ribbon leads to sleeve-like base members 18. The filament is supported by spaced discs 20, e.g. of tantalum. The discs 20 have radial slots 22, Fig. 5, ending in a central opening 26 having small projections 28 which assist in holding the discs in place. The openings 26 and projections 28 may be formed by a piercing tool after the discs have been threaded on the filament. In place of the opening 26 transverse slits may be provided, the material between the slits being bent up to form the projections after the discs are in place. Alternatively, tabs or dimples may be formed on the discs outside but adjacent to the filament.
Patent GB-1015588-A (GB)
Title: Improvements in or relating to semiconductor devices
Inventor: SANDBANK CARL PETER
IPC: H01R13/719
Filed: 1963-09-25
Abstract: 1,015,588. Semi-conductor devices. STANDARD TELEPHONES & CABLES Ltd. Sept. 18, 1964 [Sept. 25, 1963], No. 37716/63. Heading H1K. In a semi-conductor device produced by the planar process and having all the electrode contacts on the same face of the body, the resistance between the electrode region into which the first, or only, diffusion is performed and its contact is reduced by a low resistivity region underlying the electrode region. As shown, a silicon epitaxial layer 21 is deposited on a low resistivity silicon substrate 29 of the same conductivity type. The surface of layer 21 is masked with silicon dioxide and the planar process is used to diffuse base region 22 and emitter region 24 into layer 21 and to apply aluminium emitter, base, and collector contacts 25, 26, and 27, respectively. The substrate 29 reduces the collector resistance of the device. In other embodiments the original wafer is of high resistivity silicon and the low resistivity layer is produced either by diffusing an impurity into the surface of the wafer, or by alloying an evaporated metal layer to the wafer. The collector resistance may be further reduced by connecting the collector contact 27 directly to the low resistivity layer. In this case of an NPN transistor a gold-antimony collector contact may be alloyed through the high resistivity layer 21, or, if the N-type impurities in the wafer comprise antimony, phosphorus may be diffused through layer 21 from the collector window. In another method the high resistivity layer may be removed at the position of the collector contact to allow direct contact with the low resistivity layer. The semiconductor material may be removed by chemical, electrolytic, or gas (e.g. hot hydrogen chloride gas), etching, by spark erosion, or by mechanical abrasion. In the case of an epitaxial layer, the surface of the low resistivity substrate may be masked during the deposition to form islands of high resistivity material. The invention may also be applied to diodes, controlled rectifiers, field-effect devices and monolithic integrated circuits which may contain passive components. The semi-conductor material may also be germanium or gallium arsenide.
Patent GB-1432519-A (GB)
Title: Piezeoelectric crystal
IPC: H01L41/00
Filed: 1974-08-29
Abstract: 1432519 Piezo-electric resonator INTERNATIONAL STANDARD ELECTRIC CORP 29 Aug 1974 [6 Sept 1973] 37770/74 Heading H1E The equivalent circuit of a piezo-electric (e.g. quartz) plate-like vibrator with face electrodes (Fig. 1, not shown), vibrating in a longitudinal mode, comprises elements as shown, with total loss resistance R1 made up of the equivalent crystal resistance Rq having a significant temperature coefficient and Re the inherent resistance of the electrodes which may have a low TC and a value high enough to swamp Rq, making the combined TC negligible, or a TC opposite in sign to that of Rq and a value chosen to zeroize the overall TC. With the usual positive TC of Rq, the electrodes may be made of, e.g. Ta nitride vapour deposited to have negative TC or a cermet such as CrSiO. The edges of the electrodes may be indented to allow later adjustment by modification of the indentations. Attenuation due to the total loss resistance is compensated by the amplifier following (not shown).
Patent GB-785317-A (GB)
Title: Rubber antioxidant mixtures and their application
Inventor: LEYLAND BORIS NICHOLAS
IPC: C08K5/13
Filed: 1954-12-31
Abstract: Natural rubber is protected against deterioration by oxidation especially in the presence of copper or manganese, by incorporating therein at least one mercaptoarylimidazole and at least one phenol containing at least one tertiary alkyl or alkyl-cycloalkyl radical having 4 to 8 carbon atoms.  A zinc, calcium or magnesium salt of a mercaptoarylimidazole may be used. The preferred mercaptoarylimidazole is 2-mercaptobenzimidazole, but 2, 21 dibenzimidazyl disulphide is also specified.  The phenol may comprise bis (2 hydroxy-3 tert.-butyl-5-methylphenyl) methane, bis[2 hydroxy 3(a -methylcyclohexyl)-5-methylphenyl]-methane, bis (2 hydroxy 3-tert.-butyl-5 ethylphenyl) methane, 2, 21-di-hydroxy-3 tert. octyl 31 methyl 5, 51 dimethyl-diphenylmethane, 2, 21 dihydroxy-3-tert.-butyl-31(a  methylcyclohexyl)-5, 51 di-methylphenyl-methane, 2, 21 dihydroxy 3, 31 di-tert.-butyl 5-, 51-dimethyldiphenyl a  : a -butane, 2 : 6-dimethyl-4-tert. butyl phenol, 2 : 6-di-tert.-butyl-4-methylphenol, 2(a -methylcyclohexyl)-4 : 6-dimethyl phenol, or metal salts thereof.  Preferably there is incorporated in 100 parts by weight of rubber 0,5 to 4 parts of a mixture 50 to 200 parts by weight of mercaptoarylimidazole and 100 parts of the phenol.  There may also be incorporated a copper-sequestering agent, e.g., ethylene diamine tetraacetic acid or a metal salt thereof, a disalicylal alkylenediamine, 8-hydroxyquinoline, or p-amino-phenol.  In one example there are vulcanized for 150 minutes at 141 DEG C. mixes comprising 100 parts by weight of pale crepe rubber, vulcanizing ingredients, fillers, 1 part 2-mercaptobenzimidazole and 1 part bis[2 hydroxy-3-tert.-butyl 5-methylphenyl] methane, 1 part bis [2 hydroxy-3-(a methylcyclohexyl)-5-methylphenyl] methane, and 1 part bis(2-hydroxy-3-tert.-butyl-5-ethylphenyl) methane, respectively.  In further examples the antioxidant comprises (a) 2-mercaptobenzimidazole and 2(a -methylcyclohexyl)-4 : 6 dimethylphenol, (b) 2 : 6 di-tert.-butyl-4-methylphenol and 2-mercaptobenzimidazole, (c) bis[2-hydroxy-3(a methylcyclohexyl)-5-methylphenyl] methane, 2-mercaptobenzimidazole, and ethylene-bis(iminodiacetic acid) or disalicylal ethylene diamine, or disodium salt of ethylene-bis(imino-diacetic acid), (d) bis[2 - hydroxy - 3(a  - methylcyclohexyl) - 5 - methylphenyl] methane, 2 - mercaptobenzimidazole, and disalicylal ethylene diamine, and (e) bis[(2-hydroxy - 3(a  - methyl - cyclohexyl) - 5 - methyl - phenyl] - methane or 2 : 6 - tert. - butyl-4 - methylphenol or bis(2 hydroxy - 3 - tert. - butyl - 5 methylphenyl] - methane or 2(a  - methylcyclohexyl) - 4 : 6 dimethyl - phenol and 2 - mercaptobenzimidazole.  Specifications 677,584, 719,101 [Group IV(b)] 723,838, 728,291, 732,928 and 749,450 are referred to.
Patent GB-1108514-A (GB)
Title: Tree tie
Inventor: REISS OTA
IPC: A01G17/12
Filed: 1965-09-03
Abstract: 1,108,514. Tree ties. RAPIDGUM Ltd. 13 July, 1966 [3,Sept., 1965], No. 37847/66. Heading A1E. [Also in Division E2] A tree tie comprises a flexible member 11 having an enlarged portion 12 provided with an elongated aperture 13 through which the member can pass, and co-operating parts on the ends of the tie whereby the ends can be joined. The co-operating parts comprise a slot 14a and barb-shaped formations 15a. The member 11 is preferably of rubber of a plastics,material.
Patent GB-878343-A (GB)
Title: Improvements in and relating to drives and roll-adjustments for rolling mills
IPC: B21B13/00
Filed: 1957-12-06
Abstract: 878,343. Rolling. BRIGHTSIDE FOUNDRY & ENGINEERING CO. Ltd., and UDALL, W. Dec. 4,1958 [Dec. 6, 1957], No. 38030/57. Class 83 (4). In a rolling mill having a pair of annular rolls 31, 32 overhanging a roll-housing 30 and mounted one each on a driven shaft, the shaft 27 for one roll is axially adjustable and indirectly driven, on a shiftable axis, from the positively driven shaft 28 for the other roll by a slipping clutch, the positively driven shaft 28 being driven on a fixed axis by gearing 23, 24 from a driving unit, separate means being provided on the indirectly driven shaft 27 for effecting axial adjustment and angular adjustment thereof relative to the positively driven shaft 28 for correct relative location of the rolls. The positively driven shaft 28 is directly coupled to a transmission shaft 25 driven in turn by a motor 17 through bevel gearing 23, 24. An exciter motor 65 may be also provided. A sleeve 40 rotatably mounted on the transmission shaft carries slip rings 44 which are axially movable and are spring-pressed against friction rings 43 splined to an annular flange 42 of a sleeve 41 keyed to the shaft 28. Teeth 39 integral with the sleeve 40 engage teeth 38 on a sleeve 34 keyed to the shaft 27, the latter sleeve being rotatable on self-aligning bearings 35 about a stub-shaft 33. The roll-shaft 27 is adjustable in the plane approximating to that of the axis of shafts 27, 28 by rotation of an eccentric sleeve 55 in the roll-housing 30, the rotation being effected by a worm 57 acting on a worm-wheel 56 integral with the sleeve 55 and having elongated teeth. During movement the shaft pivots about a point A " in the selfaligning bearing 35. An internally and externally threaded worm-wheel 58 restrained against axial movement in the roll-housing when rotated by a worm 60, engages a thread on the sleeve 55 to adjust the shaft 27 axially. The adjustment may be made during operation of the rolls. The roll-stands may be arranged with rolls vertical or horizontal, a continuous rod mill comprising such stands being arranged with rolls horizontal and vertical in alternate stands.
Patent GB-628840-A (GB)
Title: Improvements in or relating to apparatus for the direct hydrogen-ion determination of agricultural soil and the like
IPC: F15B21/04
Filed: 1946-12-30
Abstract: 628,840. Determining physical qualities and dimensions of materials. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and FAGAN, C. P. Dec. 30, 1946, No. 38056. [Class 37] An electrode structure for directly determining the pH content of agricultural soil comprises a central electrode 5 composed, e.g., of 97 per cent antimony and 3 per cent lead. This electrode is mounted in a stainless steel container 1 from which it projects as -shown at 5a and is surrounded by polythene insulation 8. The end of this container is closed with sintered glass 4, held in place by clips 3 formed of the end of the container. A rubber ring 9 surrounding the edge of the glass protects it from shock. The annular space 10 between the insulation 8 and the stainless steel container is filled with electrolyte such as saturated potassium chloride. The electrode is screwed to a copper bar 6 to which connection is made by a heavily-insulated flexible conductor 7, This conductor, together with a flexible insulating tube 11 passes through a flexible copper tube 2 to an instrument box containing a reference 13 and an electrometer measuring apparatus. A folding aluminium stand may be provided to hold this box above the soil while the operator manipulates the electrode structure.
Patent GB-369255-A (GB)
Title: Improvements in apparatus for the electrostatic removal of dust
IPC: B03C3/76
Filed: 1930-12-17
Abstract: <PICT:0369255/III/1> <PICT:0369255/III/2> In apparatus for the electrical precipitation of gases, the collecting electrodes are vibrated by means of an electromagnet 4 supplied with alternating current of ordinary frequency, and the armature 5 of which is secured to or may be constituted by the collecting electrodes 2.  Several parallel electrodes may be connected by a cross-member 6 disposed at right-angles to the plane of the electrodes, which may also be provided with gratings 3 also connected to the member 6.  A spring 7 is provided to assist in maintaining the vibrations.  The member 6 may be connected to the middle of the spring 7 which is then fixed at both ends.  The discharge electrodes may also be vibrated, for example as shown in Fig. 2, wherein the discharge electrode system, consisting of wires 12 stretched between members 2a, is suspended from insulators 10, which are mounted on flexible metal plates 5 vibrated by the electromagnet 4.  The Specification as open to inspection under Sect. 91 (3) (a) states that interrupted continuous current may be used to feed the electromagnet.  This subject-matter does not appear in the Specification as accepted.  Reference has been directed by the Comptroller to Specifications 216,789 and 230,841, [both in Class 1 (i), Chemical processes &c.].
Patent GB-1440370-A (GB)
Title: Flashlight construction
IPC: H01R33/00
Filed: 1973-08-13
Abstract: 1440370 Electric battery lamps P G GARRITY 13 Aug 1973 [25 Sept 1972] 38259/73 Heading F4R [Also in Division H2] A handheld flashlight construction comprises a unitary housing 101 having a depending handheld portion in which the battery is disposed and a fixed upper portion including a lens opening 107 which is angled relative to the front wall 104 of the depending portion and in which is disposed a reflctor 110 including a bulb socket 113 having an inturned shoulder 151 defining a seat against which a bulb 117 is retained, and wherein two spring conductors 125, 126 operatively connect the bulb in circuit with the battery, a switch 129 being located in the upper housing portion that co-operates with one end 126B of the spring conductor 126 for moving it into and out of contact with one of the battery terminals. The bulb 117 may have a laterally projecting flange 118 which is snapped into position to be loosely but positively received between the shoulder 115 and bosses 116 disposed on the internal wall of the socket 113. The housing 101 is formed in two complementary halves, Fig. 9 and 14 (not shown), which define a switch opening 130 for locating the switch slide actuator 129, Fig. 2 (not shown), and the lens opening 107 with an adjacent groove 108 for locating the reflector flange 109 and the lens 111. The moulded plastics housing may also have integrally formed therewith ribs 140, 142 and 143 for positioning and locating the reflector and bulb sub-assembly and ribs 119, 122 and 123 for locating the battery. The housing is adapted to accommodate either two cylindrical cell batteries 121, as shown, with a contact spring 124 or a block battery shown dotted at 121A in which case the contact spring 124 is dispensed with. In a modification, Figs. 12 and 13 (not shown), an adaptor (160) is disposed in the reflector socket 113 to enable screwthreaded bulbs to be supported by the reflector.
Patent GB-1148050-A (GB)
Title: A once-through steam boiler installation
IPC: F22B35/14
Filed: 1966-08-25
Abstract: 1,148,050. Feedwater heating systems; raising steam. SIEMENS - SCHUCKERTWERKE A.G. 25 Aug., 1966 [28 Aug., 1965], No. 38277/66. Heading F4A. In a once-through boiler installation, comprising an economizer 1, evaporator (not shown), preliminary superheater 2, high pressure steam and water separator 4, final superheater 3, high pressure turbine 5, reheater 6 and low pressure turbine 7, water separated on starting up and at low load in the high pressure steam and water separator 4 is passed through heat exchanger 12 to heat at least part of the feedwater flowing to the economizer 1. From heat exchanger 12 the separated water passes through a pressure reducing valve 11 to a low pressure steam and water separator 17. From low pressure steam and water separator 17, steam flows to a regenerative feedwater preheater 18 whilst the water flows to degasifier and feedwater storage tank 19. In modifications the heat exchanger may comprise a feedwater coil located in the high pressure steam and water separator (Fig. 2), or a separated water pipe surrounded by economizer inlet tubes (Fig. 3). Valve means 13, 14 and 16 and a by-pass conduit 15 are also provided whereby at full load the feedwater may by-pass the heat exchanger 12 so reducing the flow resistance.