baber/WOPTO huggingface dataset:
Patent GB-1315087-A (GB)
Title: Pocket paging receiver
IPC: G08B3/10
Filed: 1971-11-02
Abstract: 1315087 Radio signalling AUTOPHON AG 2 Nov 1971 [2 Nov 1970] 50863/71 Heading H4L In a calling arrangement for a pocket receiver in a radio paging system, wherein the calling signal is a sequence of two frequencies, f 1 , f 2 , the received signal is supplied via amplifier VV to transistor TR11 coupled to a filter F11 tuned to f 1  and to a transistor TR21 coupled to a filter F21 tuned to f 2 . An output from filter F11 cuts off a normally conducting transistor TR12 so that TR13 becomes conductive, capacitor C12 charges and TR14 is cut off, TR2 being cut off at this stage. When TR14 is cut off capacitor C13 discharges to cause transistor TR3 to conduct. When signal f 1  ceases, TR12 again conducts and TR13 is cut off but TR14 will not conduct to cut off RTR3 until capacitor C12 has discharged, when the system will return to its quiescent state. If signal f2 is received before capacitor C12 has discharged, the output of filter F21 will cut off normally conducting transistor TR22 causing TR23 to conduct and charge capacitor C21. This causes TR24 to cut off whereby TR25 conducts, followed by TR26 and TR27, causing the audio-frequency oscillator TG to operate and produce a calling tone at loudspeaker LS. The delay introduced by capacitor C21 prevents the oscillator from responding to brief interference pulses. When TR26 conducts, TR2 also conducts so that TR14 is maintained in the cut off state and TR3 maintained conductive so long as there is an output from filter F21. Conduction of TR2 causes C12 to recharge. The audio signal from TG is rectified (R2, C1, D) causing TR1 to conduct and short-circuit the input to TR21 so that there is no output from the filter F21, TR22 conducts and TR23 is cut off. C21 then discharges via R29 after which TR24 conducts and TR25, TR26, TR27, TR4, TR2, are cut off, the audio tone ceases and TR1 is cut off. Since C12 is still charged, T14 remains cut off and TR3 remains conductive. If f 2  is still present the audio oscillator TG is again switched on and the operation repeated so that it provides an intermittent signal for the duration of f 2 .
Patent GB-1040737-A (GB)
Title: Azepine derivatives and processes for their production
Filed: 1964-12-15
Abstract: The invention comprises compounds of the formula <FORM:1040737/C2/1> wherein X represents the ethylene or vinylene group, R represents a C1- 12 alkyl, C1- 12 alkanoyl or benzyl group, and acid addition salts thereof. The compounds are prepared by (a) hydrolysing 3-amino-5-acyl- or 3-acylamino-5-acyl-5H-dibenz[b,f]azepines or their 10,11-dihydro derivatives to form 3-amino-5H-dibenz[b,f]azepine or its 10,11-dihydro derivative, reacting these with an alkanoic or benzoic acid alkyl ester, an alkanoic or benzoic anhydride or an alkanoyl or benzoyl halide and reducing the 3-benzoylamino-5H-dibenz[b,f]azepine or its 10,11 -dihydro derivative so obtained to the corresponding 3-benzyl-amino - 5H - dibenz[b,f]azepine or its 10,11-dihydro derivative and, if desired, reducing the 3 - alkenoylamino - 5H - dibenz[b,f]azepines or their 10,11-dihydro derivatives to the corresponding 3 - alkylamino - 5H - dibenz[b,f]azepines or their 10,11-dihydro derivatives, or (b) reacting a compound of the formula <FORM:1040737/C2/2> with a C1- 12 alkanal or benzaldehyde and reducing the reaction product either subsequently or in the same step.  3 - Amino - 5 - acetyl - 5H - dibenz[b,f]azepine is prepared by brominating 3-nitro-5-acetyl-10,11-dihydro-5H-dibenz[b,f]azepine with N-bromo succinimide in the presence of u/v. light, dehydrobrominating the product to form 3-nitro-5 - acetyl - 5H - dibenz[b,f]azepine and thereafter reducing this compound.
Patent GB-1274796-A (GB)
Title: Salts of hydroxy-aralkyl ester acids and their use as detergent inhibitors
Inventor: MORRIS PETER JOHN
IPC: C10L1/14
Filed: 1970-10-28
Abstract: 1,274,796. Salts of hydroxy-aralkyl ester acids. ESSO RESEARCH & ENG. CO. 28 Oct. 1970, No. 51145/70. Heading C2C. [Also in Division C5] The invention comprises compounds of the formula wherein B is a benzene ring to whicn one or more OH groups are directly attached, m is an integer, R is H or alkyl, A is the acid residue of the organic carboxylic or sulphonic acid D(AH) n+1 , where D is a carbon- and hydrogencontaining group, n is an integer and M is a metal. NH 4  or the radical derived from an amino compound, p being 1 or the valency of the metal M. They may be obtained by reacting a phenolic compound with an aldehyde at a temperature below 50 C., the pH of the reaction medium being above 7, esterifying the methylol or substituted methylol derivative thereby obtained by reacting said derivative with a polybasic carboxylic or sulphonic acid or anhydride, and reacting the ester-acid obtained with a metal base, NH 3 , NH 4 OH or an amine.
Patent GB-1478870-A (GB)
Title: Organo-chalcogen polymers
IPC: G03G5/06
Filed: 1974-11-27
Abstract: 1478870 Electro-photographic members XEROX CORP 27 Nov 1974 [13 Dec 1973] 51380/74 Heading G2C [Also in Division C3]  Electro-photographic imaging members comprise a conductive support and a layer of a photoconductive polymer containing selenium and tellurium having recurring units of Formula: and polymers having recurring units of Formula: where A is an alkylene radical or a divalent aromatic or heterocyclic radical, B is a divalent hydrocarbylene or heterocyclic radical, m is at least 1, a is at least 2 and x is at least 1 but is less than a. Alternatively, the polymer is either coated on a conductive substrate and overcoated with a layer of Se or Se alloy or used as a binder for other photo-conductive materials. In Examples tellurium is mixed with m-xylene-α, α-diselenide cyclic dimer, with poly(para-phenylene diselenide), with poly(1,4-naphthalene diselenide) and with poly(9,10-anthracene diselenide), the mixtures being melted on aluminium plates to form photoconductive layers of the polymers on the plates.
Patent GB-1081295-A (GB)
Title: Copolymers and preparation thereof
Inventor: NAGATA NOBUYOSHI
IPC: C08F22/00
Filed: 1964-01-31
Abstract: Copolymers having at least one unreacted epoxy radical and at least one carboxyl radical per molecule are prepared by reacting 45.0 to 97.5 parts by wt. of an epoxy resin having 2 radicals of the formula <FORM:1081295/C3/1> and 2.5 to 55.0 parts by wt. of an a ,b -ethylenically unsaturated carboxylic acid or maleic anhydride with heating until the percentage change of acid value is more than 10% but less than 100% to form a reaction product, and then copolymerizing 0.1 to 50 parts by wt. of this reaction product with 50.0 to 99.9 parts by wt. of at least one other copolymerizable monomer, and terminating the copolymerization while the resulting resin is still hardenable.  The first reaction step is preferably performed in the presence of a polymerization inhibitor and the second step in the presence of a chain-transfer agent.  In the examples: esters of epoxy resins and acrylic acid, methacrylic acid or maleic anhydride are prepared in the presence of hydroquinone by reaction in bulk or in solution and are solution copolymerized in the presence or absence of lauryl mercaptan using benzoyl peroxide or perchloride as catalyst with methyl methacrylate and ethyl acrylate and optionally other monomers selected from acrylic acid, styrene, acrylamide and acrylonitrile.  In Example 8 a copolymer of an acrylic ester of an epoxy resin, methyl methacrylate, ethyl acrylate, styrene, acrylonitrile and acrylamide is methylolated by reaction with paraformaldehyde in the presence of triethylamine.  The products may be compounded with further solvents and pigments to give coating compositions.ALSO:Substrates such as board or metals (e.g. iron plates) are coated (e.g. by pouring or spraying) with compositions comprising a copolymer of ethylenically copolymerizable monomers and an ester of an epoxy resin having 2 radicals of the formula <FORM:1081295/B1-B2/1> in the molecule and an a ,b -ethylenically unsaturated carboxylic acid or maleic anhydride (see Division C3).
Patent GB-1165167-A (GB)
Title: Time-Delay Relay
IPC: H01H43/30
Filed: 1966-11-17
Abstract: 1,165,167. Thermal switches. ELLENBERGER & POENSGEN G.m.b.H. 17 Nov., 1966 [23 Dec., 1965; 8 March, 1966], No. 51609/66. Heading H1N. A bimetal 4, Fig. 3, is fixed at one end 3 and has its other end mounted in a movable block ,8, the latter also carrying one end of a bimetal 10, the other end of which is bifurcated and operates a lever 24 of a snap-action microswitch 25, each bimetal providing ambient temperature compensation during operation of the other. The bimetals are heated by heaters 5, 13. On heating, bimetal 4 bends down causing block 8 to move down and the left end of bimetal 10 to move up to pivot lever 24 anticlockwise so that contacts 29, 32 of switch 25 change-over from 28, 31 to 30, 33 (see Fig. 5). Lever 24 remains in this position when bimetal 4 cools. When bimetal 4 bends down, a contact 15 on the right end of bimetal 10 breaks with an adjustable spring contact (17, Fig. 1) and opens the heating circuit of heater 13. When bimetal 4 has cooled, the contacts 15, (17) remake and bimetal 10 is heated. It bends down and pivots lever 24 clockwise to changeover switch 25. Lever 24 remains in this position when bimetal 10 cools. Switch 25 is adjustable relative to the bimetals by a set-screw 42. In another embodiment, Fig. 7, a bimetal 58 with an insulated heater 60 is fixed at one end on a set-screw 62 and has its other end mounted in a block 55 pivotable about a pin 54, block 55 also carrying a bimetal 59 with an insulated heater 61 and a bifurcated end 67 operating the microswitch lever 24. On heating, bimetal 58 bends (as shown by 58<SP>1</SP>, Fig. 10) causing block 55 to pivot and bimetal 59 to pivot lever 24 clockwise. Bending of bimetal 58 also causes a spring contact 65 on bimetal 59 to break with an adjustable contact 66, this opening the heating circuit of heater 61. When bimetal 59 is heated it bends up and pivots lever 24 anticlockwise. Switch housing 46 has eyes 48 for mounting bolts, and may have a transparent cover. The electrical connections to the terminals may be formed by a printed circuit.
Patent GB-1498456-A (GB)
Title: Electrochemical process for the preparation of dihaloalkenes
IPC: C25B3/25
Filed: 1975-12-17
Abstract: 1498456 Haloalkenes IMPERIAL CHEMICAL INDUSTRIES Ltd 25 Nov 1976 [17 Dec 1975] 51615/75 Heading C2C 1,1 - Dihalo - 4 - methyl - 1,4- and -1,3- pentadienes are obtained by subjecting 1,1,1- trihalo - 2 - hydroxy - 4 - methyl - 3- and -4 - pentene to electrolysis in the presence of a liquid diluent. The 1,4-diene product may be converted to the corresponding 1,3-diene by heating at 80-120 C. with a catalytic quantity of an organic acid other than acetic acid.
Patent GB-1237426-A (GB)
Title: Improved apparatus for stripping moulds from ingots
Inventor: MAKOSINKI STANISLAW
IPC: B22D29/04
Filed: 1968-11-01
Abstract: 1,237,426. Ingot strippers. WELLMANCRANES Ltd. 13 Jan., 1970 [1 Nov., 1968], No. 51831/68. Heading B3F. An ingot stripper has two assemblies of elements movable vertically relatively to each other, the first said assembly being adapted for engagement with an ingot and the second said assembly being adapted for engagement with the mould 65, means interconnecting the assemblies for effecting said relative movement, and two bell-crank levers 35 pivotally mounted at 36 on the said second assembly, the end of one arm of each bell-crank lever being pivotally connected at 42 to the lower end of a link 41 which has its end pivotally connected the first assembly of elements, and the end of the other arm of each bell-crank lever being pivotally connected at 38 to a pulley block 37. The said second assembly of elements includes a hollow frame 25 having a pair of tongs 27 pivotally connected at 32 to its lower end. The said first assembly of elements includes a crosshead 14 carrying a bearing 8, a screw 12, a hollow rod 10 carrying a plunger 11 at its lower end, and a hollow rod 13 which is non-rotatable but axially movable within the frame 25. The rod 10 is provided with two cams 15 which project into vertical slots 14 in the rod 13. These cams, and also cams 17 on the rod 13, act on rollers 16 which, when urged outwards, cause the rams of dashpots 34 to move and open the tongs 27 against the action of counterweights 29. To raise the mould off the ingot, the motor 1 is operated which rotates the screw 12 and causes the rod 10 and plunger 11 to move downwards to engage the ingot, the tongs 27 having closed around the mould 65 as soon as the cams 15 leave the rollers 16. If the pressure exerted by the plunger 11 is insufficient to release the ingot, continued rotation of the screw 12 causes the crosshead 44 and thus the whole device together with the mould and ingot to move upwards. This causes a pad 50 on the lever 35 to move away from a spring buffer 51 and operates a limit switch which starts a hoist motor which lowers the whole device by means of cables 61 until protrusions 52 on bellcranks 35 engage stop blocks 53 at top of the rod 13. The device is now in position for an intensified stripping action which is done by operating the drums 60 to hoist the device. This results in the whole weight of the device operating to press the ingot down and raise the mould. The device may also be used to "up strip" the ingot and for this reason is provided with a pair of tongs 20 pivotally carried by a crosshead 22 suspended below the mast 25 by straps (23). The tongs 20 grip the ingot and heels 54 on the tongs 27 abut the top of the mould. An intensified stripping action is also available in this mode of operation.
Patent GB-1292624-A (GB)
Title: Improved implantable electro-medical apparatus
IPC: A61N1/375
Filed: 1969-10-22
Abstract: 1292624 Implantable apparatus MEDTRONIC Inc 22 Oct 1969 [28 Oct 1968] 51834/69 Heading A5R [Also in Division B8] Implantable electromedical apparatus including electrical signal generating circuitry to be connected by a lead to an electrode attached to a portion of the body includes means for lead storage such that the lead may be released from the apparatus under tension after implantation to allow for growth of the body. The circuit may be a cardiac pacemaker and the means for lead storage may be a groove 12 in the periphery of a disc shaped member 10 containing the circuitry and which has a ground electrode 11.
Patent GB-1530479-A (GB)
Title: Methods and apparatus for sensing flashovers in electrical apparatus
IPC: H02H1/00
Filed: 1975-12-18
Abstract: 1530479 Control systems for electro-static precipitators WESTINGHOUSE BRAKE & SIGNAL CO Ltd 3 Dec 1976 [18 Dec 1975] 51883/75 Heading H2H A method of sensing a flashover in electrical apparatus 10 such as an electrostatic precipitator comprises sensing the current passed by a control circuit 16 in selected half cycles of an A.C. supply, comparing the current in a selected half-cycle with the current in a chosen preceding half-cycle or with a weighted average of currents in chosen preceding half-cycles whereby a flashover is sensed if the comparison indicates that the current in the latest half-cycle is greater than the current in the chosen preceding half-cycle or the weighted average of currents in chosen preceding half-cycles. An A.C. supply 14 is connected to the precipitator via a transformer/rectifier unit 12 and the control circuit 16 which includes a pair of inverse-parallel connected thyristors. The current supplied to the precipitator is sensed by a transformer or Hall-effect device 18 and fed to a monitor 20. A current comparator 24 compares the output of the monitor 20 with the output of a weighting and average circuit 26 connected to a store 22. If a flashover occurs, the resultant increased current in the following half-cycle is detected by the comparator which retards the firing point or switches off the thyristors in the circuit 16 and operates an alarm and/or indicator 40.
Patent GB-1399029-A (GB)
Title: Headgear
IPC: A61F9/02
Filed: 1972-11-10
Abstract: 1399029 Face masks D J DOUGLAS 10 Nov 1972 [11 Nov 1971] 52116/72 Heading G2J Headgear for swimmers, skiers, et al allows nostril breathing without consequent fogging of vision. It comprises a sheath 10 of organic plastics material, which is semi-rigid, having a nose portion 22 and vision areas 16. A passage 23 leads from the nose portion 22 to the periphery 19 of the sheath 10. Two such passages may lead from the nose portion 22 under the vision areas 16 to the upper periphery of the sheath 10. One wall of the passage 23 may be a sheet 25 having an opening for the nostrils; its edges 26 seal against the nose. Instead of the sheet 25 two elongated flaps may seal against the nose, so that the nose itself provides one wall of the passage 23. An insulated space may additionally be provided in each vision area 16, either by forming the sheath 10 with two plates, spaced apart and sealed round the periphery, or by providing plates sealed to a main plate about the vision areas 16. Annular grooves on spaced hook elements in one of the plates may hold a wearer's corrective eye lenses.  The sheath 10 may be sealed to the wearer's face by the same seal as that described in Specification 1379144, or may be attached to a bonnet as described in that Specification. A conduit then extends under the bonnet from the nostril breath outlet. The bonnet may also form part of a jacket, breath being then ported to the interior of the jacket. The bonnet may have a double layer construction, breath being ported to the space between the layers. The headgear may be used in conjunction with a balloon reservoir and/or a breathing valve.
Patent GB-1274099-A (GB)
Title: Electromagnetic driving device
IPC: G04C3/10
Filed: 1969-10-24
Abstract: 1,274,099. Electric timepieces. HATTORI TOKEITEN K.K. Oct. 24, 1969 [Oct. 24, 1968], No.52272/69. Heading G3T. An electromagnetic driving device particularly for a clock includes a transducer having a coil L with combined pick-up and drive functions coupled electromagnetically with a moving element, by a vibrating bar 4 or fork (not shown) carrying a magnet 5, a phase-changing circuit, e.g. comprising capacitors C1, C2 and an inductance coil L1, whereby the transducer output signal is changed in phase by the effect of the total impedance produced by the impedance of the phase shifting circuit and the resistance of the dynamic impedance produced in the transducer, and means, e.g. a NPN transistor T, for amplifying the signal changed in phase and returning it to the coil L to drive the transducer. In other embodiments the amplifier comprises a PNP transistor and alternative phase shifting circuits. In two such embodiments variable resistors, inductance coils, or capacitors are provided for adjusting the electrical oscillation frequency of the device to render it equal to the frequency of the vibrator. In a further embodiment the transducer comprises a rotor 16 Fig.4 (not shown) in the form of a ferrite disc having two pairs of N and S magnetic poles which co-operate with the pick-up and drive coil.
Patent GB-1103357-A (GB)
Title: Improvements in and relating to building blocks
IPC: E04B2/30
Filed: 1965-12-10
Abstract: 1,103,357. Moulding hollow building blocks. F. DUFFTY. 9 Nov., 1966 [10 Dec., 1965], No. 52452/65. Heading B5A. [Also in Division E1] An apertured building block 1 which is open at at least one end comprises a rectangular wire mesh frame 5 having concrete panels 2 precast at least on its longitudinal sides, the blocks in a wall being laid dry to provide a continuous cavity for a poured lightweight concrete filling in which the exposed mesh 5 is embedded. The meshes 5 of adjacent blocks may be wired together as at 6, and expansion joints may be provided at intervals. Horizontal and vertical reinforcing rods 7, 8 may be provided. A dampproof polythene film may be placed on or preformed on the inner faces of the panels. The blocks 1 are used in conjunction with end blocks, Fig. 3 (not shown), having precast concrete panels on three sides, and corner blocks 11, Fig. 6. The blocks are cast in a mould 13, Fig. 7, having its four sides hinged to a base 14 and held together by pivoted interengaging clips 16. Upstanding dowels, Fig. 8 (not shown), on the base serve to locate two complementary wedgeshape core members (18) which co-operate with small blocks (17) to locate the wire mesh frame and to define cavities for the concrete panels. The inner face of one or more of the mould sides may be patterned.
Patent GB-1317356-A (GB)
Title: Nuclear fuel subassembly
IPC: G21C3/338
Filed: 1971-11-12
Abstract: 1317356 Fuel elements COMMISSARIAT A L'ENERGIE ATOMIQUE 12 Nov 1971 [20 Nov 1970] 52618/71 Heading G6C A nuclear fuel sub-assembly comprises at least one bundle of fuel pins disposed in a regular lattice in a shroud through which coolant flows, each pin bearing a helical spacer member determining the minimum spacing between the pin and the adjacent pins or the shroud, and means for producing localized head losses, regularly distributed along the lateral sub-channels bounded by the shroud and the lateral pins in the bundle. These means serve to eliminate the imbalance which would otherwise result between the lateral and inner subchannels, the head losses due to periodic constrictions produced by the spacer members projecting into the sub-channels being more numerous in the inner sub-channels than in the lateral sub-channels, more particularly in the carrier sub-channels where there is only one spacer member instead of three as for the inner sub-channels. The spacer members may be made up of metal wires 12 having either a constant diameter or a radial projection (with respect to the pins 10) which is smaller in the regions where the wires bear against the shroud. The means for producing localized head losses comprise wires helically wound round the bundle and distributed and placed at an inclination such that they do not interfere with the spacer wires 12. In the case illustrated, four helical wires 18, 20, 22 and 24 are spaced at intervals of L/6 "L being the axial winding pitch of the spacer wires 12 on the fuel pins 10. The angle of inclination of the wires forming the head loss means is advantageously such that the axial winding pitches are the same for these wires as for the spacer wires 12. The helical wires 18, 20, 22 and 24 are borne by thin strips (26, 28) (Figs. 1 and 3, not shown), parallel to the pin axes and bearing on the shroud. These strips are secured to the end plugs of the lateral fuel pins, there being two such strips to each side of the shroud which is hexagonal in cross-section.