baber/WOPTO huggingface dataset:
Patent GB-1472048-A (GB)
Title: Production of polyetherpolyols
IPC: C08G18/18
Filed: 1975-10-03
Abstract: 1472048 Polyetherpolyols; polyurethane foam TAKEDA YAKUHIN KOGYO KK 3 Oct 1975 [7 Oct 1974] 40683/75 Heading C3R Polyether polyols are prepared by reacting an alkylene oxide with at least one compound containing active hydrogen atoms some or all of which comprises the reaction product obtained by heating the distillation residues, produced in the distillation of a crude organic polyisocyanate obtained by phosgenation of an organic amine, in the presence of (A) at least one compound selected from water, an alcohol or an amine and (B) at least one compound selected from an oxide or hydroxide of an alkali or alkaline earth metal or a monoalkanolamine. A monoalkanolamine, e.g. monoethanolamine may fulfil the function of both (A) and (B). Examples relate to the use of 2-methoxyethanol as (A) and NaOH as (B). The distillation residue may be obtained in the preparation of crude tolylene- or diphenylmethane-diisocyanate. Examples relate to the preparation of polyether polyols by reacting ethylene oxide and propylene oxide with (1) tolylene diisocyanate residues and (2) a mixture thereof with diethylene glycol. The resultant polyetherpolyols may be used in preparing rigid polyurethane foams by conventional methods.
Patent GB-1140330-A (GB)
Title: A dental handpiece
IPC: A61C1/14
Filed: 1967-09-06
Abstract: 1,140,330. Dental handpieces. MORITA SEISAKUSHO K.K. 6 Sept., 1967 [26 June, 1967], No. 40704/67. Heading A5R. A dental handpiece arranged for easy fitting and removal of a tool (6) comprises a hollow cylindrical body 1 on which is detachably connected a first tubular member 2 securely containing one end of a second tubular member 4, there being a collar 10 eccentrically and rotatably mounted in a profiled bore 9 in the member 2 and having an inwardly projecting pin 12 and part circumferential rib 11, and the tool (6) being rotatably held in a third tubular member 5 which has at least one slot 7 able to receive the pin 12 and a circumferential groove 20 able to receive the rib 11, the arrangement being such that the tool (6) and third tubular member 5 may be fitted to the handpiece body so that the slot 7 and pin 12 inter-engage and so that, by rotating the member 5 and the inter-engaged collar 10 relative to the members 2, 4 (from the position of Figure 3 to that of Figure 4 - Figures 3 and 4 are not shown), the collar is compressed by the profiled bore 9 and the rib 11 and groove 20 engage to secure the tool and member 5 in the handpiece. As described, the collar is split (at 10', Figure 3, not shown) and provided with a recess 19, the rotation of the collar being limited by the split end (13) of the collar engaging a recess (15,21) in the bore 9 and also by a pin 17 on the member 2 engaging the recess 19. The dental tool (6), e.g. a drill, is rotated within the member 5 by a motor-driven shaft A which engages the rear end B of the tool.
Patent GB-1190458-A (GB)
Title: Produciton of Amides, Polyamides and Amino Acids.
IPC: C07K1/02
Filed: 1967-09-08
Abstract: 1,190,458. Preparation of amides. BADISCHE ANILIN- & SODA-FABRIK A.G. 8 Sept., 1967 [9 Sept., 1966], No. 41119/67. Heading C2C. Amides or polyamides are prepared by reacting a nitrile with H.COOH at 150-350‹ C. and a superatmospheric pressure at least equal to the vapour pressure at the temperature used of the reactants, the substances formed in the reaction and the solvent, if present. The H.COOH used is preferably more than 80% by weight strength, 98-100% by wt. being desirable. The nitrile and H.COOH may be used in equivalent amounts or the nitrile may be added in excess to act as a solvent. The process is particularly suitable for the preparation of amides from aliphatic, cycloaliphatic, araliphatic or aromatic nitriles and from aliphatic, cycloaliphatic or araliphatic hydroxycarboxylic nitriles. Hydroxycarboxylic nitriles yield polyamides, from which amino acids are obtainable by hydrolysis. In the examples (1) p-chlorobenzonitrile; (2) undecylenonitrile; (3) 3-chlorobenzonitrile, and (4) terephthalonitrile are converted to pchlorobenzamide, undecylenamide, 3-chlorobenzamide and terephthalodiamide respectively; and (5) to (7) isobutyraldehyde-, n-butyralhyde-, and ethylene-cyanohydrins are converted via polyamides to valine, α-amino-valeric acid, and #-alanine respectively.
Patent GB-1301809-A (GB)
IPC: C06B21/00
Filed: 1971-09-06
Abstract: 1301809 Propellants WASAGCHEMIE GmbH 6 Sept 1971 [22 Sept 1970] 41363/71 Heading C1D A polybasic propellent charge powder having a reduced initial combustion rate is prepared by forming powder grains containing nitrocellulose, a nitrate ester of a polyhydric alcohol and a water-soluble nitrogen compound, dissolving out the nitrogen compound from the outer layers of the powder grain by one or more treatments with water at normal or elevated temperature, and then introducing a desensitizer into the surface layer. The water-soluble nitrogen compound may be nitroguanidine, guanidine nitrate, dicyanodiamide, ammonium nitrate, or ammonium perchlorate. Suitable desensitizers are camphor, Centralite, urethanes, or phthalates. In an example, a mixture of nitrocellulose, nitroglycerine, nitroguanidine, and methyldiphenylurea moistened with alcohol and acetone is extruded and cut into lengths, extracted with water for 30 minutes at 50‹ C., and then treated with different strength alcoholic solutions of dibutyl phthalate and a solution of Centralite. The propellant may also contain TNT.
Patent GB-1480660-A (GB)
Title: Control and monitoring device for oil or gas burners
IPC: F23N5/20
Filed: 1975-10-09
Abstract: 1480660 Burner controls DANFOSS AS 9 Oct 1975 [9 Oct 1974] 41419/75 Heading F4T The disclosure is the same as that of Specification No. 1,480,659, but the claims are diverted to a control and monitoring device for oil or gas burners which comprises a photo relay F included in a flame monitoring circuit FW, and a thermal time relay P for determining the pre- and post-ignition periods, the switch P 1  of the time relay controlling at least one fuel feed element MV 1 , an ignition device TT, and the heating coil of the time relay P, the ignition device TT being capable of connection through a rest contact a of a switch F 1  of the photo relay, to the voltage supply line, the time relay being connected so as when in operation to be heated beyond the pre-ignition period, and to render the flame monitoring circuit inoperative during the post-ignition period.
Patent GB-1019728-A (GB)
Title: Improvements in and relating to impact-absorbing devices for vehicles
IPC: B60N2/28
Filed: 1964-10-13
Abstract: 1,019,728. Protecting guards. A. F. KENT. Oct. 13, 1964, No. 41794/64. Heading B7B. A protecting guard for children in an automobile comprises a number of separately inflatable tubes joined by narrow strips of material which may be perforated, the tubes being secured to end walls having access openings b<SP>1</SP>. An opening may be provided in the side wall at b.
Patent GB-1079189-A (GB)
Title: Stabilized rosin as emulsifier in aqueous emulsion polymerizations and method of preparing same
Inventor: BOYLAN FRANCIS JOSEPH
IPC: C08F2/24
Filed: 1965-10-01
Abstract: An emulsifier for use in emulsion polymerization processes is prepared by distilling a stabilized rosin under reduced pressure to leave a residue of from 3% to 20%, and reacting the overhead fraction with sodium or potassium hydroxide, carbonate or bicarbonate.  The stabilized rosin starting material may be a disproportionated or hydrogenated resin or a mixture thereof.  The distilled rosin may be mixed with an oil, e.g. a mineral oil before saponification.
Patent GB-924794-A (GB)
Title: Improvements in and relating to the measurement of random noise in electrical signals
Inventor: HOLDER JOHN ERIC
IPC: G01R29/26
Filed: 1960-12-05
Abstract: 924,794. Noise measurement. BRITISH BROADCASTING CORPORATION. Jan. 25, 1962 [Dec. 5, 1960], No. 41856/60. Class 37. Apparatus measuring random noise power of an input signal having intervals over which in absence of noise the amplitude is unchanged or changes in predetermined manner; comprising a gate circuit sampling the signal during such intervals and a high-pass or band-pass filter selecting components therefrom which are free from spurious components introduced by the gate, for application to a noise power measuring device. A video signal comprising (Fig. 1) line sync. pulses 1 separated by longer constant signal levels 2, together with random noise, is connected to sync. separator 9 (Fig. 2) extracting the sync. signals to trigger pulse generator 10 at the termination of each sync. signal, which operates clamp 11 to hold the output of amplifier 7 fed from the input over variable attenuator 6 to a fixed predetermined level, and to trigger pulse generator 12 followed by pulse shaping network 14 to generate gating pulses intermediate of the sync. pulses to open the modulator 13 following amplifier 7, so as to sample the output thereof during each constant signal level 2. The noise samples are freed from spurious components introduced by gating by a high-pass filter 16, amplified, and the noise power of the successive samples is measured at 18. Attenuator 6 is adjustable to produce a standard reading at 18 and may be calibrated in signal to noise ratio. Oscillator 19 switchable to the input of attenuator 6 to supply a signal amplitude and waveform is utilized for calibration. For measurement of random noise only, pulse generator 10 may run free or be synchronized from an outside source, and for measurement of a video signal containing line and frame sync. pulses, a gate is provided in advance of sync. separator 10 to disable it during frame sync. pulses. A high-pass filter eliminating low-frequency amplitude fluctuation may be inserted between attenuator 6 and modulator 13 to replace clamp circuit 11 operating on amplifier 7.
Patent GB-938237-A (GB)
Title: Glass bending mold
IPC: C03B23/027
Filed: 1961-11-23
Abstract: 938,237. Bending glass sheets. PITTSBURGH PLATE GLASS CO. Nov. 23, 1961 [Nov. 30, 1960], No. 41900/61. Class 56. In a glass bending apparatus of the skeletonmould type a heat absorber member for protect. ing the " flat " part of the sheet during the bending operation comprises a plurality of "Venetian blind" louvres with means operatively connected to the louvres and the mould for rotating the louvres between a horizontal position parallel to the sheet during the heating phase and a vertical position normal to the sheet during the cooling phase. A rectangular frame 53, Fig. 1, attached to the longitudinal rail 12 of a skeleton mould, supports a plurality of pivotally attached louvres 59, 60, 61, each having an end crank 63 which passes through an apertured bar 64. The bar 64 is attached to a link 65, pivotally attached to a " pie slice " shaped plate 66 (Fig. 2) having attached thereto a small weight 67, the plate being pivotally attached to a bar 68 which extends laterally from the rail section 12. The outer edge surface 70 of the plate 66 is urged upwardly into contact with a weight arm 33 of the end mould section 31. Thus, in the open position of the mould, the arm 33 is elevated to permit the plate 66 to pivot into the position shown in phantom lines, Fig. 2, and the apertured bar 64 rotates the cranks 63 which in turn rotate the louvres into a horizontal position. When the heated glass sheet sags, the weight arm 33 moves downwardly causing a reverse movement to bring the louvres into a position normal to the glass sheet thus allowing cooling air to circulate over the " flat " part of the sheet. In an alternative embodiment, Fig. 4 (not shown), the louvres are locked in a horizontal position by a mechanism having a hook attachment which is contacted in its path of movement along the conveyer by a cross-bar tripping mechanism positioned between the furnace and tempering apparatus. The crossbar causes the hook to move its position, unlocking the louvres which rotate from a locked horizontal position to the vertical position. To vary the heat absorbing effect the louvres which may be made of stainless steel may be of graded sizes (3/16 inch to 1/8 inch) or some louvres may be apertured.
Patent GB-1468502-A (GB)
Title: Preparation of ethylene polymers
IPC: C08L23/08
Filed: 1974-04-09
Abstract: 1468502 Ethylene copolymers E I DU PONT DE NEMOURS & CO 9 April 1974 [9 April 1973] 42042/76 Divided out of 1468228 Heading C3P Ethylene copolymers of reduced gel content and low melt index are obtained by a continuous process comprising (a) introducing into a reactor monomers comprising at least 75% of ethylene and sufficient comonomer to provide at least 5% by weight of the polymer selected from vinyl esters, acrylic esters and optionally maleic acid or anhydride and an acrylic acid, (b) polymerizing at 100-250‹ C. and 1000-2500 atmospheres (c) reducing pressure on the effluent to 100-400 atmospheres to separate 90-97% of unreacted monomers, (d) further reducing pressure to 0-5 atmospheres gauge to separate remaining monomers and (e) adding, after the pressure has been reduced to below 250 atmospheres and when 90-97% of unreacted monomers have been separated, a free radical initiator dissolved in a non-wax solvent.
Patent GB-1322157-A (GB)
Title: Starting systems for diesel engines
IPC: F02B3/06
Filed: 1971-09-09
Abstract: 1322157 Glow plug ignition ROBERT BOSCH GmbH 9 Sept 1971 [10 Sept 1970] 42056/71 Heading F1B [Also in Division H2] A system for starting a Diesel engine comprises glow plugs 204, a starter motor, a generator, a manually operable switch 1 for supplying current to the glow plugs, a switch 208 for automatically switching on the starter motor after the glow plugs have been energized for a predetermined time and a relay 32 adapted to be connected to the generator for interrupting the current supply to the starter motor when the engine has started. On depressing a push button 101 of the switch 1, a movable contact 113 bridges contacts 114, 115 to connect a battery via a switch 404, which is closed when the gears are idle, a contact 312 of a bi-metal switch 31 and a contact 322 of the relay 32 to an energizing coil 111. The coil co-operates with an armature 110 to hold the switch 1 in its depressed position in which contacts 117, 118 are bridged by a contact 116 to connect the generator to a coil 321 of the relay 32. The battery is therefore connected via leads 400, 405 to the glow plugs 204, a pilot lamp 206 and a heater 209 of the switch 208. After the predetermined time, a bi-metal contact 210 of the switch 208, which is in thermal contact with the engine coolant 211, closes to connect the battery via leads 406, 401 to the starter motor circuit. Also a heater 311 of the switch 31 is energized and opens the contact 312 to release the push button switch 1 if the engine has not started within a pre-set time. Assuming the engine to have started within the pre-set time, the generator energizes the coil 321 to open the contact 322 thereby releasing the switch 1. The push button switch may be depressed beyond its first position to cause a contact 103 to bridge contacts 104, 105 thus connecting the battery directly to the starter motor circuit to enable a rapid re-start of a cold engine.
Patent GB-1381557-A (GB)
Title: Filter
IPC: B01D46/24
Filed: 1972-09-11
Abstract: 1381557 Gas filter MASCHINENFABRIK BETH GmbH 11. Sept 1972 [11 Sept 1971] 42141/72 Heading BIT Groups 6 of outward-flow filter bags or tubes 7 are connected to respective upper support rails 5 and foot plates 10 to form units (each comprising three tubes 7 in the example shown) which can be readily inserted into or removed from a filter housing in a collapsed condition through small access doors in the housing wall, and further dismantling of tubes 7 from spigots 9 is performed outside the housing. As shown-each rail has a lug 23 adapted to slide into a support 3, and spacers 24 separate the, two rails 5 which engage each support 3. Foot plates 10 carry lugs 16 which extend .down through apertures 12 in tube plate 13 and through apertures in reinforcing struts 22. Lugs 16 are then engaged by hooks 20 actuated by a handle 19 outside the housing to pull foot plates 10 into sealing engagement (gaskets 11) with tube plate 13, which, separates the dirty and clean gas chambers of the housing. During assembly a group of tubes is folded and inserted through an upper access door (24') into clean gas chamber (15) (Fig. 1, not shown). Its rail 5 is engaged with a support 3, hooks 20 are then engaged with lugs 16, and when all groups are in position the complete array of supports 3 is raised by bolt 4 to tension the tubes. Lower access door (25) -is provided through which to locate the foot plates 10. In an alternative construction, hooks 20 are omitted, the groups are inserted through the dirty gas chamber and pulled up through apertures 12 so that foot plates 10 seal-against the underside of tube plate 13. Rails 5 are then engaged with supports 3, and tightening bolt 4 both tensions the tubes and tightens the seals between plates 10, 13.
Patent GB-1158330-A (GB)
Title: A Method of Producing Refractory Mouldings for Furnace Linings.
IPC: C21C5/44
Filed: 1966-09-21
Abstract: 1,158,330. Tar bonded basic refractories. DOLOMITWERKE G.m.b.H. 21 Sept., 1966 [21 Sept., 1965], No. 42154/66. Heading C1J. Refractory furnace lining mouldings are obtained by mixing burnt, sintered, or molten dolomite, magnesite, lime or their mixtures with a tar like substance moulding, and day heating to 200-450‹ C. the heating time being on or between curves A and C in the figure, depending on the temperature, finely divided coal, coke, graphite, soot or active carbon can be added to the refractory material and/or tar which can also contain a polymerization or condensation catalyst. Fibre-like fugitive materials can be included so that drainage channels for the volatiles are formed during the heat treatment. High pressure is used if a higher carbon content is required in the mouldings and a low pressure used if easier removal of the volatiles is desired. An increased carbon content of the outer layers is obtained by spraying with liquid tar before heating, and after heating the mouldings can be protected with an organic coating to give a smooth surface. The refractories can also contain Cr 2 O 3 , ZrO 2 , Fe 2 O 3  or MnO 2 .
Patent GB-1203086-A (GB)
Title: Ohmic contact and electrical lead for semiconductor devices
Inventor: CUNNINGHAM JAMES ALAN
IPC: H01L23/485
Filed: 1967-09-15
Abstract: 1,203,086. Semi-conductor devices. TEXAS INSTRUMENTS Inc. 15 Sept., 1967 [30 Dec., 1966], No. 42214/67. Heading H1K. [Also in Division C7] An electrical lead in ohmic contact with a region of an insulation coated semi-conductor body includes a gold layer overlying a layer of molybdenum, with a further layer of molybdenum on top of the gold layer. In constructing a typical silicon integrated circuit comprising a number of sub-circuits, only part of which is shown in Fig. 7, after formation of the device zone configurations by epitaxy and diffusion a surface oxide film is apertured by photoetching at desired contact points and successive layers of molybdenum, gold, molybdenum applied by sputtering, evaporation or sublimation. These are form-etched to provide the requisite first level of interconnections, which extend to contact pads at the periphery of each subcircuit section. After optionally heating in oxygen to form a genetic molybdenum oxide film on the interconnections the entire surface is coated with silicon nitride, silica, alumina, tantalum oxide or an organic insulant by evaporation or sputtering. This layer, together with the underlying molybdenum oxide and molybdenum is etched away over the contact pads and then further layers of molybdenum and gold deposited and form-etched to form a second layer of interconnections between the sub-circuits, and gold wires are thermocompression bonded to the terminal areas of this second layer. To improve the quality of the contacts to the silicon a thin film of aluminium or platinum silicide and/or a heavily doped diffused region may be provided at the molybdenum-silicon interface, and traces of platinum can be added to the gold to make it adhere more readily to the molybdenum.
Patent GB-1158846-A (GB)
Title: Improvements in or relating to Hearing Aids
Inventor: HARRIS HERBERT MONTAGUE
IPC: H03F3/183
Filed: 1966-09-21
Abstract: 1,158,846. Hearing aid; transistor amplifiers. H. M. HARRIS. 21 Dec., 1967 [21 Sept., 1966], No. 42235/66. Headings H3T and H4J. A hearing aid amplifier circuit includes D.C. feedback via resistor 19, which sets the operating point of the silicon transistor amplifier stages, and variable A.C. feedback via resistor 22 to provide gain control. Capacitor 23 controls the frequency response of the circuit, capacitor 30 prevents instability at high frequencies and resistor 29 matches the impedance of the loudspeaker 27 to that of the amplifier 13.
Patent GB-1316302-A (GB)
Title: Ignition and control system for a burner
IPC: F23Q7/12
Filed: 1970-09-03
Abstract: 1316302 Ignition and control circuit for burners ROBERTSHAW CONTROLS CO 3 Sept 1970 [10 Sept 1969] 42315/70 Heading F4T In an ignition and control system for a fuel burner 10 comprising an input transformer 24, an electrical resistance igniter 14 with a positive temperature coefficient, a solenoid-operated fuel valve 12, and switch means connecting the igniter and the valve to the transformer secondary winding 22, first and second control means are provided responsive to the voltage across the igniter and the current through the igniter, respectively, to control the switch means, the igniter thereby acting as a sensing element. The first control means comprises a holding coil 110 and associated armature 126 in parallel with the igniter and supplied with rectified current by means of diodes 122, 124, and the second control means comprises a heat expansible wire 60 in series with the igniter. The switch means includes contact 32 forming switch 36 with contact 34 mounted on movable arm 38 biased by compression spring 42, an L-shaped lever 54 pivoted on pin 56, secured to hot wire 60, and biased by compression spring 64, lever 54 and arm 38 being connected by spring 48, and a finger 66 mounted on lever 52 to abut the underside of arm 72 and carrying a ring 70 to control arm 72 co-operating with arm 84 and biased by compression spring 76. When thermostatic switch 28 is closed, current flows through switch 36, igniter 14, leads 98 and 100 and wire 60 to energize the igniter and heat hot wire 60, the initial resistance of the igniter being too low to pull in coil 110. The current heats wire 60 and the expansion of the wire rotates lever 54 clockwise to break switch 36 and shut down operation of the system, but if the igniter reaches fuel ignition temperature before this, holding coil 110 pulls in to keep switch 36 closed, and movement of ring 70 allows closure of switch 82 to energize and open fuel valve 12. If the igniter should short or rupture, one of the control means will detect a voltage decrease or current decrease respectively and the system will fail safe, and if fuel flow cools the igniter below fuel ignition temperature without coil 110 dropping out, spring 48 opens switch 36 upon subsequent heating of wire 60.