baber/WOPTO huggingface dataset:
Patent GB-966753-A (GB)
Title: Electrical apparatus responsive to changes in a physical variable
IPC: G01F23/26
Filed: 1960-09-01
Abstract: 966,753. Determining liquid levels. MINNEAPOLIS-HONEYWELL REGULATOR CO. Sept. 1, 1960 [Sept. 2, 1959], No. 30185/60. Heading G1N. [Also in Division H3] A liquid level sensing system comprises an amplifier provided with a positive feedback path via one capacitor and a negative feedback path via another capacitor, the value of one of the capacitors being dependent on the liquid level, the system becoming self-oscillating when the liquid level reaches a predetermined value. Fig. 1 shows a direct coupled transistor amplifier 10 feeding a phase splitting transformer 29. A positive feedback path is taken from one end of the secondary winding 75 via a liquid level sensing capacitor 90 to the input of the amplifier 10. A negative feedback path is provided via capacitor 97. When the liquid level reaches a value pre-set by potentiometer 81 the system becomes self-oscillating, transistor 119, supplied by secondary winding 76, becoming conductive, energizing relay 131 which provides an indicating signal. Alternatively the sensing and reference capacitors 90, 97 can be fed with reverse polarity so that the system oscillates when the level falls below a predetermined value. The indicated level may alternatively be adjusted by variation of the reference capacitor 97. A further transistor operating a lamp or buzzer, may be fed from the output of transistor 119. Fig. 2 shows a modification in which a phase splitting transistor 237 replaces transformer 29 and the relay-operating transistor is supplied directly from the amplifier output.
Patent GB-1119459-A (GB)
Title: An arrangement for indicating the presence of impurities such as contaminating and poisonous substances in a gaseous or vaporific medium
IPC: G01N1/22
Filed: 1967-06-30
Abstract: 1,119,459. Indicating impurities in gases. L-E. TAMMELIN and A. BRANTTE. June 30, 1967 [July 6, 1966], No.30190/67. Heading G1B. An arrangement for indicating impurities such as contaminating and poisonous substances, in air and other gases comprises indicating or detecting means 5 carried by a rotatable disclike member 1 having radial channels 2 which at the perimeter of the disc form gas outlets 4 and at the centre of the disc communicate with gas inlets 3 including the indicating or detecting means and means for rotating the disc. The rotating means may comprise at least two intertwined cords 6, 7 each of which passes through a hole 8, 9 adjacent the disc centre. The indicating or detecting means such as a filter carrying a chemical reagent are fitted into the inlets either directly or on a removable carrier. Each indicator may be used to detect a different substance, coloured rings 10 being used to identify the different reactants. Different dimension throttle plates may be mounted behind the indicating means 5 to vary the quantity of air or gas sucked in.
Patent GB-1420700-A (GB)
Title: Key for a socketed component
IPC: B25B13/02
Filed: 1973-06-26
Abstract: 1420700 Spanners DORMAN SMITH TRAFFIC PRODUCTS Ltd 12 June 1974 [26 June 1973] 30199/73 Heading B3N A key 10 for a socketed component 11, is stamped from sheet metal and has a body in the form of a flat strip, a tongue 16 protrudes from one end of the body on one side thereof. The key has an integral cross-piece 17 with a hole 19 for attachment to a key-ring. Projection 18 is for operating a switch recessed in a hole. The cross-piece may be circular or triangular. Further, the key may be L-shaped or in the shape of a quarter of an annulus.
Patent GB-1401363-A (GB)
Title: Electronic coin tester
IPC: G07D5/00
Filed: 1972-06-28
Abstract: 1401363 Metal detectors M PRUMM 28 June 1972 [7 July 1971] 30343/72 Heading G1N [Also in Division G4] A coin tester in which the effect of a coin on an electromagnetic field is evaluated includes at least one field winding 6 and two measuring windings 4 surrounding a coin channel 1. The measuring windings 4 are preferably of identical construction and are serially connected in anti phase such that in the absence of a coin the combined output of the windings is zero. The field winding support 5 is slidable on the coin channel so as to facilitate balancing of the outputs of the two measuring windings and also supports an output winding 7 associated with the field winding and screening 8. A coin moving through the coin channel, preferably in free fall, causes two voltage peaks 10, 30, Fig. 6, in the output of the measuring windings and damping of the voltage in the field winding, which reaches a peak 20 substantially midway between the peaks 10, 30. Fig. 6 shows voltage curves 1000, 2000 and 3000 for three different types of coin. The frequency of the supply to the field winding may be changed after the first peak 10 is reached thus producing a peak 30 of different height to peak 10. Evaluation circuitry is arranged to analyze either one of the voltage peaks 10, 30; one of these peaks and the damping in the field winding or, where the frequency is changed after the first peak is reached, both of the peaks 10, 30 and the damping of the field winding. The signals from the windings may be evaluated without rectification and may be added to or subtracted from each other before evaluation, but preferably each signal is evaluated individually and the results of the evaluations logically coupled. Three modifications of the winding arrangements are shown in Fig. 7 (not-reproduced) in which the measuring windings are disposed on either side of a field winding, two field windings are disposed one on each side of a pair of measuring windings, and two pairs of measuring windings are surrounded by a common field winding.
Patent GB-851979-A (GB)
Title: A process for the production of fine threads from aliphatic polyolefines of high molecular weight
IPC: D01D1/06
Filed: 1958-09-23
Abstract: In a process for the production of fine threads by dissolving a polymer of an aliphatic olefin having from 2 to 5 carbon atoms, having a molecular weight of more than 70,000 and having been prepared by a low pressure polymerization process in a paraffin hydrocarbon oil and/or a naphthene hydrocarbon oil, having a viscosity of from 1 to 6 DEG  Engler at 50 DEG C. to form a solution having a polymer concentration not exceeding 18% and spinning the solution as described and claimed in the parent Specification, a modification comprises spinning the threads into a water bath at from 5 to 45 DEG C. and extracting the solvent with methylene chloride in two subsequent washing stages with interposed initial stretching and subsequent final stretching.  The temperature of the water bath is preferably from 10 to 35 DEG C. while the threads may be initially stretched between the two washing stages in a hot water bath.
Patent GB-882283-A (GB)
Title: Improvements in or relating to annular magnetic-recording heads
IPC: G11B5/187
Filed: 1960-09-02
Abstract: 882,283. Magnetic record heads. PHILIPS ELECTRICAL INDUSTRIES Ltd. Sept. 2, 1960 [Sept. 5, 1959], No. 30376/60. Class 40 (2). The core of a magnetic head comprises two magnetic circuit portions 1, 2 mechanically connected together by non-magnetic solder 10, 17, one of the joints comprising the recording gap 17. Preferred solders are silver-indium alloy and eutectic alloys of silver-copper and gold-copper.
Patent GB-340629-A (GB)
Title: Improvements in or relating to shuttles for sewing machines
IPC: D05B15/00
Filed: 1929-10-08
Abstract: 340,629. Sewing-machines. BRITISH UNITED SHOE MACHINERY CO., Ltd. and MINETT, W. T., Union Works, Belgrave Road, Leicester. Oct. 8, 1929, No. 30451. [Class 112.] Lockstitching by hooks. - A rotary bobbin case provided with the loop-taking hook, suitable for lock stitching on shoes, of the type wherein the bobbin is retained by spring fingers, is enabled to house a larger bobbin by providing the cam for lifting the fingers on the outside of the case. The invention is specially applicable to the boot sewing-machines described in Specifications 23478/10 and 100,036, [both in Class 112, Sewing &c.]. The tubular case 1 has a housing 3 for the bobbin 5 and has a loop-taking beak or hook 11. Teeth 13 are provided for rotating the case by engagement with a driving pinion. A shoulder 15 is provided round the member 7 to engage the rib 19 on the bobbin case 17. This case has a split sleeve 21 for the bobbin. A sleeve 29 on the fixed member 25 carries fingers 31 urged towards the bobbin case 17 by springs 33 and released therefrom by the cam ridge 39 on the outside of the case. This device holds the bobbin case rigid with the hook for a period and then releases it to allow the under thread to pass between the finger and the case.
Patent GB-759379-A (GB)
Title: Removal of mannitol from a solution of polyols
Filed: 1953-11-04
Abstract: 759,379. Polyol solutions. ATLAS POWDER CO. Nov. 4, 1953 [Nov. 20, 1952], No. 30464/53. Class 2 (3). Mannitol is separated from non-crystallizing polyols in the aqueous reduction product of a saccharide by a method comprising adjusting the ratio of water to non-crystallizing polyol to a value of at least <SP>25</SP>/ 100'  adjusting the pH to a value of not over 4, crystallizing and separating mannitol from the resulting composition and adjusting the pH value of the said composition to a value between 4 and 7. In the examples: (a) the water content of an aqueous polyol solution obtained by the alkaline catalytic hydrogenation of invert sugar is adjusted to 21.2 per cent and its pH to 3.5 by the addition of sulphuric acid; a white precipitate of mannitol is formed on cooling and is then filtered off; the filtrate is adjusted to 7 and concentrated to a water content of 16 per cent to give a syrup which shows no tendency to cloud on storage; and (b) the water content of a polyol solution, obtained by the electrolytic reduction of invert sugar in alkaline solution, is adjusted to 20.2 per cent and its pH to 2.0, the mannitol present crystallizes and is filtered off and the pH of the residual solution is adjusted to between 5 and 7 to give a syrup which is stable to storage at room temperature.
Patent GB-887883-A (GB)
Title: Manufacture of carotenoid preparations
Filed: 1960-09-05
Abstract: A preparation containing a corotenoid in finely divided form, suitable for use as a colouring matter for foodstuffs, is obtained by emulsifying a solution of a carotenoid in a volatile water-insoluble solvent in an aqueous solution of a swellable colloid, and removing the volatile solvent in known manner. Specified corotenoids are corotene, lycopene, bixin, zeaxanthin, cryptoxanthin, lutein, canthaxanthin, b -apo-81-carotenal and b -apo-81-carotenic methyl ester.  The volatile solvent is preferably chloroform or methylene chloride but carbon tetrachloride, trichloroethylene or carbon disulphide may also be used and an oil or fat may also be added.  The swellable colloid may be gelatin, gum arabic, dextrin, polyvinyl alcohol, pectin, polyvinyl pyrrolidone, starch, methyl cellulose, carboxymethyl cellulose, gum tragacanth or alginates and a plasticiser such as saccharose, invert sugar, glucose, sorbitol, mannitol may be added.ALSO:A preparation containing a carotenoid in finely-divided form is p  obtained by emulsifying a solution of a carotenoid in a volatile water-insoluble solvent in an aqueous solution of a swellable colloid, and removing the volatile solvent in known manner.  The product may be a gel, sol or fine powder and may be used as a colouring matter for foodstuffs.  Specified carotenoids are carotene, lycopene, bixin, zeaxanthin, cryptoxanthin, lutein, canthaxanthin, b -apo - 81 - carotenal, and b  - apo - 81 - carotenic methyl ester.  The volatile solvent is preferably chloroform or methylene chloride, but carbon tetrachloride, trichloroethylene or carbon disulphide may also be used and an oil or fat may also be added.  The swellable colloid may be gelatine, gum arabic, dextrin, polyvinyl alcohol, pectin, polyvinyl pyrrolidone, starch, methyl cellulose, carboxymethyl cellulose, gum tragacanth or alginates and a plasticizer such as saccharose, invert sugar, glucose, sorbitol, mannitol or glycerine may be added.
Patent GB-229030-A (GB)
Title: Improvements in educative dummy firearms
IPC: F41C3/08
Filed: 1923-12-04
Abstract: 229,030. Reardon, R. E. Dec. 4, 1923. Guns and pistols firing amorces or caps. - A toy pistol or gun for firing caps carried by a strip T has means for feeding the strip and firing the caps comprising, in addition to the hammer K, anvil A<4> and trigger Q<1>, two members for gripping the strip and conveying it bodily to the anvil comprising a plate Q<3> and a spring pawl S both carried by the trigger blade Q. A fixed spring pawl P opposes return movement of the strip. The plate Q' when in the forward position extends over the anvil and shields the caps on the strip from back fire. During the pull of the trigger, the plate engages a strut L depending from the hammer, first raising the hammer and then releasing it. A sear Y is provided for use when it is desired to cock the hammer by hand. The sear is released by the plate Q<3>. The pistol may be provided, as shown, with a captive rod D in the barrel adapted to be projected by a blow from the hammer K to mark a target card fixed near the muzzle.
Patent GB-648107-A (GB)
Title: Improvements in or relating to collapsible carrying containers
IPC: B65D5/36
Filed: 1948-11-24
Abstract: 648,107. Boxes. JOHNS, SON & WATTS, Ltd., and WATTS, A. E. Nov. 24, 1948, No. 30567. [Class 18] A collapsable partitioned carboard box comprises two identical containers secured back to back, opposite side walls 4 of the containers being scored diagonally for folding. The sides fold up from the base of each container and one side comprises an inner extension 24 overlapped by interlocking flaps 19. The backs 10 may be extended to form a handle 17. Ventilation holes may be provided in the side walls of the box.
Patent GB-676899-A (GB)
Title: Improvements in circuits for receiving and demodulating frequency-modulated oscillations
IPC: H03G11/06
Filed: 1949-08-29
Abstract: 676,899. Frequency modulation. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Aug. 29, 1949 [Dec. 2, 1948], No. 30592/49. Class 40 (v). An F.M. receiver comprises I.F. amplifier valves 1, 2, feeding through circuits 38, 37 tuned to the mean frequency, a detector 3 having load circuits 9, 4, respectively, producing an A.V.C. voltage and a voltage i.Z responsive to both the amplitude i of the oscillations and variation in impedance Z of the tuned circuit 37 as the frequency deviation varies. The voltage (i.Z) is fed back retroactively through a reflex amplifying circuit employing valve 2, and from across a filter 7 to the A.V.C. line 31 connected to valve 1 so that i.Z is maintained constant and any original amplitude variation of the input I.F. oscillations to a discriminator 41 connected to the output circuit of valve 2 is substantially eliminated. Thus i varies in amplitude inversely as the impedance Z of circuit 37 as the impedance varies. According to the invention the tuned circuit 37 of the detector 40 is given a frequency response variation (b), Fig. 2, decreasing with variation from the mean frequency, e.g. by damping, which after phase inversion by the valve 2 (to (c), Fig. 2) is applied to variable-mu valve 1 so that third harmonic distortion of the discriminator 41, due to its output curve ((a), Fig. 2) showing an inflexion, is compensated. Alternatively, if the discriminator 41 employs only a single rectifier, second harmonic distortion may be corrected. In a modification (Fig. 3, not shown), the output of detector 40 is of negative voltage and undergoes two phase reversals, first by the initial triode portion of a heptode valve and then by the succeeding portion. Specifications 636,375, 659,598, and 676,541 are referred to.
Patent GB-817608-A (GB)
Title: Apparatus in ships for closing a transverse duct through the ship's hull and propulsion means in said duct
IPC: B63H25/46
Filed: 1957-10-01
Abstract: 817,608. Manoeuvring ships. VOITH G.m.b.H., J. M. Oct. 1, 1957 [Oct. 22, 1956], No. 30644/57. Classes 113 and 114. In a ship having propulsion means in a duct extending transversely through the hull, closing means at each end of the duct are embodied in rotatably deflectable flaps which in one extreme position are arranged to close the duct and in their other extreme position and in the intermediate positions operate in the manner of guide vanes as known in flow type machinery and thus produce a rudder effect. In Fig. 1 the ends of the duct 2 have a plurality of flaps 4 affixed to hinges 5 rotatably mounted in the ships hull 1. The moving vane propeller 3, is protected from damage by floating debris by bars 6 extending across the open ends of the duct, the flaps being shaped or arranged so that their deflection is not impeded. In Figs. 5 and 6 flaps 16, 17 of unequal size are provided to be rotatable about hinges 14, 15 to close the rectangular ends of the duct, and to open to have a supplementary rudder effect. In Fig. 8 the propulsion means is a screw propeller 18, the transverse duct 21 being of substantially cylindrical shape and the flaps 19, 20 shaped as shown in Fig. 9 in their closed position.
Patent GB-520532-A (GB)
Title: Improvements in and relating to dielectric and cooling mediums
IPC: H01F27/08
Filed: 1938-10-24
Abstract: 520,532. Dielectric and cooling mediums. BRITISH THOMSON-HOUSTON CO., Ltd. Oct. ,24, 1938, No. 30688. Convention date, Oct. 23, 1937. Drawings to Specification. [Class 36] [Also in Group XIII] Liquid compositions for dielectric and cooling purposes in electrical apparatus, such as transformers, comprise one or morehalogenated benzoate esters, and a halogenated diluent or diluents, with or without chlorinated diphenyl, the benzoate ester or esters preferably constituting not less than 15 per cent. by weight of the composition. Compositions referred to comprise (1) approximately equal parts of chlorinated phenyl benzoate and trichlorbenzene (2) 30 to 45 parts by,weight of pentachlor phenyl benzoate, 40 parts of trichlorbenzene, and 30 to 15 parts of chlorinated diphenyl containing about 60 per cent. chlorine, and (3) 15 per cent. pentachlor phenyl benzoate, 40 per cent. trichlorbenzene and 45 per cent. hexachlorinated diphenyl. In place of trichlorbenzene, diluents. such as chlorinated benzotrifluoride and chlorinated ethyl benzene may be used, and the chlorinated phenyl benzoate may be replaced wholly or in part by chlorinated naphthyl, methyl, ethyl, propyl and butyl' benzoates. With the chlorinated aliphatic esters of benzoic acid, the chlorine should be wholly contained in the aromatic nucleus. The phenyl benzoate may be prepared by effecting a reaction between phenol and benzoyl chloride at 150 to 170‹ C., and halogenated by bringing it into contact with chlorine &c. in the presence of a catalyzer such as iron, antimony or their chlorides preferably at progressively increasing temperatures between 150 and 225‹ C.
Patent GB-835157-A (GB)
Title: Improvements in or relating to control valves for organs and similar musical instruments
IPC: G10B3/06
Filed: 1957-10-01
Abstract: 835,157. Organs. MAAG, M. Oct. 1, 1957 [Oct. 4,1956], No. 30718/57. Class 88 (2). [Also in Group XXIX] A key-operated valve in the air supply is normally held closed by the minimum force required to do so, this force including the weight of the movable member of the valve which may be assisted by a spring, and the speed of opening of the valve on depression of the associated key is controlled by a dashpot comprising a plunger and a cylinder. Mechanical valve, Fig. 1.-A valve 15, actu. ated by a key 26 through a leaf spring 19, controls the flow of air from a wind chest 1 to pipes set in apertures 29. The valve comprises a plunger 13 moving in a bore 12 to give a dashpot effect which is adjustable by means of a flatsided screw 32 having a tapered end 33 which controls the size of the venting orifice of the dashpot. Electromagnetic (solenoid-operated) valve, Fig. 2. The venting orifice contains a ball 56 in a conical socket so that the dashpot is ineffective during the closing of the valve. The ball 56 seats against an adjustable flat-sided screw 54. In a modification, Figs. 3 and 4, the vent of the dashpot is controlled by an adjustable plate 161 seating on a tube 65 having diametral grooves 70 in its end adjacent to the plate 161.
Patent GB-1138790-A (GB)
Title: Improvements in or relating to fixing assemblies for use in corrosive conditions
Inventor: PRAMPART JOSEPH CHRISTOPHE MAR
IPC: B63H1/20
Filed: 1967-07-04
Abstract: 1,138,790. Covers for screws. SOC. FINANCIERE ET INDUSTRIELLE DES ATELIERS ET CHANTIERS DE BRETAGNE. 4 July, 1967, No. 30733/67. Heading F2H. In an assembly in which two members 1, 2 are secured together by a screw or other fixing member 3, the head 5 of the screw or other fixing member is seated in a recess 7 in one of the members 2 and a protective cap 10 is fitted over the head and engaged in an annular socket formed between the head 5 and the adjacent side of the recess 7, a rubber gasket 12 being sandwiched between the head 5 and the rim of the cap. The cap 10 is secured to the head by an auxiliary screw 13 engaging a tapped central hole 15 in the head 5 which may be provided with a cruciform type slot formation 9. A locking tab 16 may be provided for the auxiliary screw 13, and to prevent relative rotation between the screw 3 and cap 10 and between the cap 10 and member 2 studs 17, 18 respectively may be provided. In an alternative embodiment (Fig. 3, not shown), the cap 10 is provided with a screwed member (22) engaging a slot (23) in the member 2 and the head (5) and cap (10) are non-circular in cross-section so that relative rotation between the cap and member and between the cap and head is prevented. The cap 10 may be of stainless steel.
Patent GB-307395-A (GB)
Abstract: 307,395. Standard Telephones & Cables, Ltd., (Assignees of Thorp, V. P., Rea, W. T., and Gardner, F. G.). March 6, 1928, [Convention date]. Multiplex signalling; wired wireless systems.- In a multiplex carrier current telegraph system means are provided to operate an alarm and apprise the operators on the joint failure of all the channels. The Figure shows a. receiving line L1 associated with a number of receiving channels each comprising a filter FA, a demodulator DA and a. relay 2. When a receiving relay 2 remains on the spacing contact S a slow to operate relay 4A is energized. The relays 4A in series control a circuit 9 which is closed when all the relays operate and energizes a relay 10 to operate an alarm 13 and a relay 12 to short-circuit the transmitting channel 15. Further relays 5A in the circuit 9 are energized and connect each receiving channel 6A to its own transmitting circuit break relay so that each operator receives his own signals reversed. The relay 10 also operates a restoring apparatus 25 which includes thermostatic relays 21, 23 alternately energized and causes the shortcircuiting relay 12 to be intermittently deenergized so that when the line is restored signals are transmitted intermittently to energize the line L2 and restore the distant receiver. In a modification (Fig. 1 not shown) slow to release relays are provided in series with the receiving relays and control a series circuit which contains relays to operate the alarm and connect each receiver to the break relay in its own transmitter circuit.
Patent GB-354113-A (GB)
Title: Socket for mounting radio valves and the like
IPC: H01R33/76
Filed: 1930-10-14
Abstract: 354,113. Thermionic valve holders. DAUDE, G. E. GOBIN-, 20, Avenue Marigny, Fontenay-sur-Bois, Seine, France. Oct. 14, 1930, No. 30778. Convention date, Aug. 1. [Class 39 (i).] A socket for mounting radio valves and the like comprises a tubular member 1 of suitable internal diameter having an annular collar 2, and a ring- like plate member 3 fitting tightly over the tube 1, and bearing on the flange 2. The member 3 has three radial arms 4, 5, 6, one of which, 4, serves for making electrical connection, and the other two, 5, 6, being radially opposite, and adapted to be bent down and folded over the flange 2 thus securing a close hooking engagement with the member 1. The two arms 5, 6 form a spring clip for tightly gripping the valve pin inserted in the socket.