baber/WOPTO huggingface dataset:
Patent GB-1154950-A (GB)
Title: Improvements in or relating to Double-Lumen Balloon Catheters
IPC: A61F2/958
Filed: 1967-08-02
Abstract: 1,154,950. Catheters. EDWARDS LABORATORIES, Inc. 2 Aug., 1967 [22 Aug., 1966], No. 35589/67. Heading A5R. A balloon catheter comprises an outer tube 10 which supports a balloon 35 and an inner tube 11 which defines with the outer tube a passage 25 which is occluded at the distal end of the balloon for inflating the balloon, one of the tubes terminating at the distal end of the balloon and the other having an apertured tip end 40 extending beyond the balloon. Rigid sleeves 30, 31 between the tubes at each end of the balloon support the outer tube at the securing windings 36, 37 of the balloon. The distal sleeve 30 is secured to the inner tube 11 by epoxy cement 12 which occludes the inflating passage 25. The inflating passage 25 communicates with the balloon through staggered openings 38 in the outer tube 10. The tip end 40 has openings 41, 42. The outer tube 10 is cemented to a fitting (13, Fig. 2) through which it communicates with a third tube (21), a shut-off valve (22, Fig. 1) and a connector (23) for a source of inflating liquid or gas e.g. a syringe (24). The inner tube 11 passes through the fitting into a tube (15) connected to a gauge (17), for measuring pressure within a body duct or cavity, or a source of dye, medicament or other chemical.
Patent GB-884053-A (GB)
Title: Improvements in or relating to dynodes for use in electron discharge tubes and methods of making same
Inventor: WILCOCK WILLIAM LESLIE
IPC: H01J43/10
Filed: 1959-10-22
Abstract: 884,053. Secondary-electron-emissive electrodes. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Sept. 30, 1960 [Oct. 22, 1959], No. 35850/59. Class 39(1) A dynode comprises a composite film supported by an outer frame 1, the film including a slack, electron-permeable supporting layer 2, where necessary a layer of conductive material 3, and a layer of secondary-electron-emissive material 4 marginally spaced from the inner edge of the frame. The arrangement is such that, upon subsequent baking, e.g. outgassing of a discharge tube, shrinkage of the emissive material causes some of the slack in the supporting layer to be taken up, but does not tear this layer away from the frame. In a preferred method of making such a dynode, an initially taut layer 2 of aluminium oxide or magnesium oxide, e.g. an anodised aluminium sheet 450 thick, is stuck to a soda glass ring 1 and is then permanently stretched by heating to a temperature such that the expansion of the ring 1 relative to the layer 2 stretches this layer beyond its yield point. Alternatively, the layer 2 may be of gold or silver arid the frame 1 of a metal having a larger thermal coefficient of expansion. If a conductive layer 3 is required it may be of aluminium, and the emissive material may be an alkali metal halide or an alkaline earth metal halide, e.g. potassium chloride, both being applied to the supporting layer 2 by evaporation in vacuo. As shown in Fig. 6, a plurality of such dynodes 8 are mounted by means of wires 9 in an image intensifier tube.
Patent GB-970151-A (GB)
Title: Improvements relating to control devices for automatic washing machines
IPC: D06F34/30
Filed: 1963-09-11
Abstract: 970,151. Coin freed apparatus. CONSTRUCTAWERKE G.m.b.H. Sept. 11,1963 [Oct. 11,1962], No. 35856/63. Heading G4V. A group of washing machines is controlled by a common coin freed mechanism. As shown, machines A, B, C, are connected to the control device 1 with coin slot 2, selector switches a1,b1,c1, and lamps a2, b2, c2 which indicate those machines in use. Once a machine is selected by a switch a1, b1 c1, it operates a relay in the control device to isolate that switch until the machine cycle is completed. Selection may be made by a rotary selector switch or the next available free machine may be indicated and allocated by the control device as an automatic response to the insertion of coinage.
Patent GB-1351781-A (GB)
Title: Method of producing flame-resistant polyurethanes
IPC: C08G18/50
Filed: 1971-07-30
Abstract: 1351781 Flame-resistant polyurethanes CHEMISCHE FABRIK KALK GmbH 30 July 1971 [17 Aug 1970] 35936/71 Heading C3R  Flame-resistant polyurethanes are prepared by carrying out the polyurethane-forming reaction in the presence of a neutral halogencontaining adduct formed by the reaction of an alkylene oxide, a halogen-containing alkylene oxide, a diene oxide or a mixture thereof and bis - (2,3 - dibromopropyl)phosphate in the absence of phosphate monoesters and having one free hydroxyl group per molecule. It is preferred to react the phosphate with epichlorohydrin. Foams may be prepared by incorporating a blowing agent in the reaction mixture.
Patent GB-1479688-A (GB)
Title: Apparatus for monitoring battery energy level
IPC: G08B29/18
Filed: 1974-08-15
Abstract: 1479688 Battery tester: ionization smoke detector STATITROL CORP. 15 Aug 1974 [16 Aug 1973] 35962/74 Headings G1N and G1U The state of charge of a battery connected across terminals 26, 27, Fig. 2, is monitored by intermittently loading the battery, by an oscillator, Fig. 3 (not shown) and by comparing, by a PUT 80, the voltage of the battery when loaded with its voltage immediately before it was loaded, this latter voltage being stored on a capacitor 82. If the voltage when on load is sufficiently less than the no load voltage, PUT 80 conducts and an output pulse is passed via a terminal 29 to an alarm, Fig. 4. With the circuit described, providing the voltage stored on capacitor 82 is a sufficiently small fraction of the battery voltage, it can be shown that the anode-gate voltage of the PUT 80 increases either with a decrease in the no load battery voltage or with an increase in the internal resistance of the battery, so that an alarm signal is produced either with modest changes in both these parameters simultaneously, or with a larger change in either parameter singly. The above battery monitoring circuit forms part of a smoke detection system, including an ionization chamber 40, Fig. 5, that provides a positive output on a terminal 28 when smoke is present. The detector circuit shown is powered by a battery across terminals 20, 21, the voltage on a line 57 being stabilized by a Zener 46 and a transistor 44. With no smoke present the chamber 40 conducts and an FET 41, which receives a gate potential, set by a divider 51, ..., 54 from an emitter follower 43, is conductive. When smoke is present conduction in the chamber 40 is reduced, the FET turns off, and a transistor 42 turns on to provide a positive output on the terminal 28 which is connected to an SCR 61, Fig. 4, via a terminal 31. The detector circuit is temperature compensated by a thermistor 47.
Patent GB-435666-A (GB)
Title: Improvements in or relating to binders or loose leaf book covers
IPC: B42F13/16
Filed: 1934-12-14
Abstract: 435,666. Loose - leaf binders. BERBERICH, W., 60, Gartenstrasse, Heilbronn, Wurtemberg, Germany. Dec. 14, 1934, No. 35965. [Class 146 (i)] A loose-leaf binder comprising rigid filing- rings f arranged at the back of the book, and each having an interrupted or cut-out portion to afford two ends, one of which is fixed to a rail or bar i, the other end h being free for insertion through perforations in the leaves l, is characterized by the fact that the rings are moved circumferentially to cause the free extremities thereof to contact with, or to be moved away from, a support for the loose leaves, by reason of the application of pressure to the bar i, or the release of such pressure respectively, caused by the movement of a part of the binder. The bottom cover a supports the leaves, and is folded over backwardly at b, and then folded over again at c, forming a rounded back d, preferably provided with grooves, corrugations, or the like, and then passed over to constitute the top cover e. The parallel-arranged rings f are inserted in approximately coinciding holes g in the cover a, so that when the book is being closed the bar i is engaged at c by the part d to cause the rings f to move into a position wherein the free ends h thereof engage the bottom cover a, thus holding a pile of leaves l securely in position. The holes g will be forced into coincidence during the closing of the binder. When the binder is opened completely, the bar i is relieved of the pressure and the holes g will move out of superposition to force the extremities h of the rings f to move away from the bottom cover a. The bar i may be flattened to fit against the underside of the folded portion of the cover a. In a modification, a rigid support folded over at the filing end is perforated to support the rings, and this support is inserted into a pocket formed by the bottom cover of the binder. The rings are moved by moving the support into or out of the pocket. The rings f and bars i may be made of metal, celluloid, or synthetic resin, and the covers and supports may be made of millboard, cardboard, or strawboard.
Patent GB-1373017-A (GB)
Title: Rotary machines
IPC: F01C1/20
Filed: 1971-11-02
Abstract: 1373017 Rotary fluid machines J A MONTEIL 2 Nov 1971 36193/71 Heading F1F In an engine or pump having rotary abutments 4, 4' which have recesses 5, 5' co-operating with teeth 3, the latter are located between axially spaced annular shoulders which define an annular groove G on the periphery of a rotor 2 mounted in a casing 1. To improve sealing, labyrinth leakage paths may be formed by arranging the abutments 4, 4' (Fig. 1) in pairs or larger groups. The rotor 2 and abutments 4, 4' are synchronized by means of co-operating gear teeth. Leakage across the crowns of the teeth 3 is reduced by forming therein axially extending slots which may house sealing strips Figs. 3-5 (not shown) preferably outwardly biased by springs in which case the casing may have a hard wearing lining. The casing surrounding the abutments 4, 4' may also be provided with a plurality of grooves Fig. 7 (not shown), and the abutments provided at each end with a raised annular lip Fig. 2 (not shown). The tooth crown sealing strips may extend across the rotor shoulders and co-operate with a number of annular seals located in grooves in the shoulders, the latter seals each comprising a number of arcuate sections, the two sets of seals forming a network to effectively seal between the shoulders and the casing 1. Alternatively, a number of flexible annular seals j, k, Fig. 6, mounted in the rotor shoulders may be biased by leakage fluid against the side walls of annular chambers h formed in the casing 1. As a further alternative, sealing between the casing 1 and the shoulders of the rotor may be effected by a lattice work of axial and circumferential sealing members located in annular recesses in the casing 1. Such sealing obviates the need for casing endplates, and the rotor may be mounted on its shaft by means of a spider to enable cooling air to pass through the rotor. The shaft may be hollow to receive coolant and the casing may be water jacketed.
Patent GB-1107501-A (GB)
Title: Improvements in and relating to aryl silicate heat transfer fluids
Inventor: BEANLAND ERIC
IPC: C07F7/04
Filed: 1963-09-13
Abstract: An aryl silicate composition is made by heating a tetraphenyl silicate and/or tetracresyl silicate with another phenol, appropriate to the production of a mixed aryl silicate, in the presence of water in an amount sufficient to cause partial hydrolysis and condensation of the silicate.  The water is best provided by using wet phenol or a hydrated salt and effecting the reaction at 100 DEG  to 250 DEG  C. The purification of aryl silicates described in Specification 37025/64. may be combined with the above process by incorporating a zeolite in the reaction mixture. In examples, mixed aryl silicates are made by the above process from tetraphenylsilicate and (1) o-phenylphenol and (2,3,4) resorcinol.  Aroxysilanes, e.g. phenyl- and biphenyl-triphenoxy silanes, may also be used as the starting material.  Uses: as heat transfer media.ALSO:An aryl silicate composition, obtained by heating a tetraphenyl silicate and/or tetracresyl silicate with another phenol in the presence of water (see Division C3), is used as a heat transfer medium.
Patent GB-1440093-A (GB)
Title: Fourquadrant multiplier
IPC: G06G7/16
Filed: 1973-07-31
Abstract: 1440093 Electric analogue multipliers PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 31 July 1973 [3 Aug 1972] 36288/73 Heading G4G A four-quadrant multiplier for multiplying two signals x, y comprises a first differential stage including transistors 1, 2 to whose bases x is applied and whose common emitter circuit includes a current source I 1 , a second differential stage including transistors 3, 4 the emitters of which are connected to the collector of transistor 1 and to whose bases y is applied, and a third. differential stage including transistors 5 and 6 whose emitters are connected to the collector of transistor 2, the bases of transistors 4 and 5 and transistors 3 and 6 being respectively interconnected, and the output currents of transistors 3, 4, 5, 6 are combined to produce an output signal which is representative of the product x.y. This combination of currents is effected by means of circuitry including a first multiple current mirror S 1  (a current mirror is defined in the Specification as a D.C. current amplifier for realizing a current in an output path, or a plurality of output paths in a multiple current mirror, which bears a constant ratio to a current in an input path, for at least a range of input current values, the ratio being independent of temperature and supply voltage) which supplies first and second output currents i 11 , i 12  which are determined by the collector current of transistor 4, first adding means, e.g. a second current mirror S 2 , by means of which a sum current i s1  is formed from the collector current of transistor 3 and current i 11 , second adding means, e.g. a third current mirror S 3 , by means of which a second sum current i s2  is formed from the collector current of transistor 5 and current i 12 , and a first feedback circuit via which current i s1  is fed back to the input of the first differential stage and a second negative feedback circuit by which current i s2  is fed back to the input of the second differential stage. It is shown mathematically in the Specification that the combined collector currents of transistors 9 and 17 will be dependent on the product x.y. The current mirror S 10  is used to provide the correct phase for negative feedback of i s1  to transistor 1. In another embodiment Fig. 2 (not shown) the collectors of transistors 3, 4, 5, 6 are connected to individual multiple current mirrors which are so interconnected and their outputs are fed back to the inputs of the differential stages that a constant term in the output of Fig. 1 (i.e. a term additional to the product x.y) is eliminated.
Patent GB-361137-A (GB)
Title: Small typewriter
IPC: B41J1/32
Filed: 1930-12-03
Abstract: 361,137. Typewriters. HOLZER, R. V ON, 54, Bornheimerlandstrasse, Frankforton-Main, Germany. Dec. 3, 1930, No. 36429. [Class 100 (iv).] Index type-wheel machines.-A type-wheel is geared to a setting-device comprising two positivelyconnected index-members which are operated by the right and left hands and are set with reference to an index-plate having the characters so arranged that the index-members register with only one character at a time. In the machine shown in Figs. 2, 3, and 4, a frame 25, 26, 27, mounted to slide on rods 28, 29, supports bell cranks 9, 10 having keys 7, 8 for receiving a finger of the left and right hands respectively. The keys are connected to notched index-members 4, 5 arranged over an index-plate 1, the characters 2 being so arranged that only one notch at a time registers with a charatcer. The keys engage abutments 13, 14 on a bail 15 suspended from the frame 25, 26, 27 and connected to arms 18, 19 carrying a rack 20 which engages a pinion 3 on the shaft 31 of the type-drum 21. The shaft is mounted on a plate 22 which is pivoted on a vertical axis 23 and is provided with a pin 24 entering a grooved member 25 on the rack. Lateral movement of the keys rotates the type-drum for type-selection, and depression of one of the keys rocks the typedrum for impression, an aligning-rack 34 preventing simultaneous depression of both keys. A pivoted plate 36 in connection with letter-spacing mechanism abuts on a pin 38 on the plate 22. In an alternative arrangement, each index-member has a slot for receiving one of the fingers, and a depressible bar for rocking the type-drum is arranged below the slots and is operated by the fingers. The framework of the machine may be covered by sheets of galalith, celluloid, or the like. Paper-supports; feed-roller detents.-The machine may be provided with a cylindrical type-drum and a platen roller or, preferably, with a polygonal type-drum, and a platen bar 59, Fig. 4, which is associated with guides 51, 52 and feed-rollers 53, 54 for the paper. The feed-roller 53 may be provided with a knob 55 having recesses for engaging a detent consisting of a spring-pressed ball.
Patent GB-1236153-A (GB)
Title: Article storage apparatus
Inventor: EATON KENNETH C
IPC: A47F1/12
Filed: 1969-07-21
Abstract: 1,236,153. Refrigeration. K. C. EATON. 21 July, 1969, No. 36486/69. Heading F4H. [Also in Division A4] In an apparatus for cooling cylindrical articles (see Division A4) which comprises a tray having an inlet channel, an outlet channel and a guide which directs the articles from the inlet channel through a turn-around path into the outlet channel, said guide including a resiliently deflectable surface which prevents the articles from jamming, the base of the tray is formed from the shelf 110 of a refrigerator. The width of the tray may be adjusted to the size of the shelf and the articles to be stored by a telescopic connection 118.
Patent GB-1151877-A (GB)
Title: Photogrphic Material
IPC: G03C1/835
Filed: 1966-08-16
Abstract: 1,151,877. Bis quaternary compounds. EASTMAN KODAK CO. 16 Aug., 1966 [16 Aug., 1965], No. 36619/66. Heading C2C. [Also in Division G2] 1: 6 - Hexamethylene - bis (substituted-pyridinium salts) are made by heating hexamethylene diamine with 2-methyl-4: 6-diphenylpyrylium iodide, 2: 4: 6-trimethylpyrylium perchlorate or with a 2-methyl-4: 6-di-m- (or p-)- tolylpyrylium, or 2: 6-dimethyl -4-(3-pyridyl)- pyrylium halide. 3: 3<SP>1 </SP>- Pentamethylene - bis - (2 - methylbenzo - thiazolium bromide) is made by heating 2-methylbenzothiazole with 1: 5-dibromo-pentane.
Patent GB-1071133-A (GB)
Title: A method of and apparatus for rectification of high voltage heavy currents
IPC: H01J17/40
Filed: 1964-09-08
Abstract: 1,071,133. Cold-cathode tubes. A. I. NASTJUKHA, E. A. KOLTYPIN, and P. A. SMIRNOV. Sept. 8, 1964, No. 36712/64. Heading H1D. High voltage heavy currents are rectified in apparatus which is operated at a gaseous filling pressure less than that corresponding to the minimum of the Paschen curve, and which includes an anode and a solid cold cathode, and means providing a magnetic field arranged such that part of the flux thereof intersects the cathode twice without intersecting the anode, e.g. such as is provided by a solenoid coaxial with but axially spaced from a closed cylindrical cathode which surrounds a disc anode (Fig. 1, not shown). The cylindrical aluminium watercooled chamber 1, Fig. 4, sealed to the base 2 by rubber washer 3 forms a cathode, which encloses a water-cooled copper disc anode 5, a magnetic field having the required form being provided by a solenoid 6. The air or hydrogen filling is maintained in the range 10<SP>-3</SP>-10<SP>-2</SP> torr by pumping system 8 and needle valve 9 in the supply conduit, and is measured by gauge 10. For pulsed operation, a trigger pulse is applied to the ring anode 13 mounted in an auxiliary chamber 11 in which, since it accommodates the gas supply inlet, the pressure is somewhat higher than in the main chamber, with which it is connected by orifice 12. In an alternative embodiment (Fig. 5, not shown), the trigger pulse is applied to a hot tungsten filament mounted in a small chamber formed in the base 2, and separated from the main chamber by a metal grid.
Patent GB-522643-A (GB)
Title: Improvements in or relating to the production of derivatives of urea
IPC: C07C273/18
Filed: 1938-12-16
Abstract: 522,643. Ethers of dimethylolurea. DU PONT DE NEMOURS & CO., E. I. Dec. 16, 1938, No. 36719. Convention date, Dec. 17, 1937. [Class 2 (iii)] Diethers of dimethylolurea are manufactured by reacting substantially dry dimethylolurea with one or more normal, secondary or iso monohydric alcohols (preferably in excess) at a raised temperature, e.g. 50-125‹C., in the presence of anhydrons magnesium sulphate. In examples: (1) dimethylolurea is refluxed with isobutyl alcohol in the presence of anhydrous magnesium sulphate; (2) isopropyl alcohol is similarly reacted; (3) sec. butyl alcohol is similarly employed. The process is also applicable to the preparation of the normal alkyl diethers of dimethylolurea, e.g. the dimethyl, diethyl di-n-propyl and di-n-butyl ethers of the diaralkyl ethers, e.g. the dibenzyl ether from benzyl alcohol, and also of mixed alkylaralkyl ethers by using a mixture of an alkyl and an aralkyl alcohol.
Patent GB-1282826-A (GB)
Title: Nonlinear encoder and decoder
Inventor: KANEKO HARUO
IPC: H04B14/04
Filed: 1970-07-29
Abstract: 1282826 Coding and decoding NIPPON ELECTRIC CO Ltd 29 July 1970 [10 Nov 1969] 36777/70 Heading G4H A non-linear analogue/digital converter (Fig. 13) for bipolar input signals V IN1  at terminal 11 comprises a first bit coding stage 36 (delivering a digital output in accordance with the polarity of V IN1  and an analogue output V OUT1  =-/V IN1 /), a second bit coding stage 37, receiving as its input V IN2 =V OUT1 +constant and delivering an output bit in accordance with the polarity of V IN2  and an analogue output V OUT2 =-V IN2/4  if V IN2 <0 and -V IN2  if VIN 2 >0 is 0 and a feedback encoder for the remaining bits receiving at its input V IN3 =V OUT2  if V IN2 <0 and V OUT2 +constant if V IN2 >0. The encoder includes a non- linear matrix circuit controlled by the encoder comparator 34 and controlling a ladder network 334 producing the feedback signal. As described, the first bit coding stage includes a feedback amplifier 361, the polarity of the signal at point 367 resulting in a bi-stable 369 delivering a digital signal corresponding to the sign bit. The second coding stage receives the negative or zero signal from the first coding stage and a constant bias from source 380, bi-stable 375 being controlled in a similar manner to bi-stable 369 in dependence on whether the output from the first stage has an absolute value greater or less than the bias. The bi-stable 375 additionally controls a current generator 370 to add in a similar constant bias whenever the second bit is " 1." The output of the adder 32 is fed to the comparison circuit 34, the output of which controls a two-bit memory circuit 3311, 3312 connected to the matrix circuit controlling constant current generators 332 applying signals to the ladder network 334. A serial P.C.M. signal is derived by reading out sequentially the states of the bi-stables 365, 375 and bi-stables 3311, 3312 in the memory circuit. Whilst a four-bit is derived with the apparatus shown, similar apparatus may be used to derive a seven-bit thirteen segment compounding characteristic of the form by using a matrix circuit deriving a seven-bit output to control a ladder. The serial P.C.M. signal may be decoded (Fig. 19) by applying it to a series to parallel converter 52, all but the two most significant bits of which are then read out to a ladder decoder 53, the analogue signal from which is fed together with the second bit to a decoder 54 controlling a further decoder receiving additionally the first bit to give a bipolar PAM output at terminal 56.