baber/WOPTO huggingface dataset:
Patent GB-698538-A (GB)
Title: Improvements in or relating to circuit-arrangements for energizing relays
IPC: H04Q1/18
Filed: 1952-03-25
Abstract: 698,538. Automatic exchange systems. PHILIPS ELECTRICAL INDUSTRIES, Ltd. March 25, 1952 [March 28, 1951], No. 7649/52. Class 40 (iv). [Also in Group XL (c)] A more rapid operation of a relay T connected in the output circuit of a valve B1 is obtained by connecting an inductor L in series with the relay and with the output of a second valve B2, the control electrode of the second valve being coupled to an output of the first whereby when the first is rendered conductive the second is cut off. The back E.M.F. of the inductor opposes that of the relay coil and thus prevents the drop in anode voltage of the first valve that would otherwise occur. The circuit shown is used in the register of an automatic telephone system to interrupt the rotation of a selector K when the voltage comparator OI indicates that the voltage from the selector is equal to that from a marking switch MS controlled by the subscriber. When the equality occurs valve B1 is cut off and contact T breaks the circuit of the motor D of the selector. Momentary interruption of the anode current of valve B2 causes the relay to release but it is rapidly restored when current again flows, due to the action of valve B2 fed from the screen of valve B1.
Patent GB-681887-A (GB)
Title: Method of making metal molds
IPC: B29C33/00
Filed: 1951-04-03
Abstract: 681,887. Moulds for aircraft canopies &c. GOODYEAR AIRCRAFT CORPORATION. April 3, 1951 [May 4, 1950] , No. 7683/51. Class 87 (ii). [Also in Group XXII] A method of making a metal mould for casting optically true multicurved articles of thermoplastic or thermosetting resin includes forming a pattern or matrix of polished plastic sheet without bringing it into contact with solid material except along its held edge portions, depositing a metal cover of desired thickness all over the pattern and removing the pattern by cutting the cover at its edge to form two cooperating mould parts. Thermoplastic sheet material such as methyl methacrylate having very smooth polished surfaces is brought to a flanged domed form 1 in heated condition by free-blowing or by centrifugal action with only the edges of the sheet being held. It is then given a coating 2 of a metal such as copper, iron or nickel by electrodeposition to the required thickness, the edge part 3 of the coating is cut off and the parts 4 and 5 removed to form cooperating mould parts with smooth surfaces 6, 7 which may be chromium plated. Stiffening rings 8 and 9 are brazed or soldered to the mould parts 4, 5 the ring 8 having a centring flange 11. The upper mould part 4 may be provided with one or more funnels 12 for supplying the plastic material to the mould or the material may be poured into the lower part 5 berore the upper part 4 is placed in position. The mould part may be reinforced and used for forming thermoplastic material by pressing. Specification 619,675 is referred to.
Patent GB-1276820-A (GB)
Title: Analyser
Inventor: SCHERBAN ALEXANDR NAZARIEVICH
IPC: G01N27/16
Filed: 1971-03-25
Abstract: 1276820 Analysing gases electrically INSTITUT TEKHNICHESKOI TEPLOFIZIKI AKADEMII NAUK UKRAINSKOI SSR 25 March 1971 7783/71 Heading G1N [Also in Divisions G4 and H2] Apparatus for measuring the concentration of an oxidizable gas in a gas mixture comprises a catalyst detector element 19, 21, Fig.2, in a bridge circuit 3 fed with D.C. through a bi-stable multi-vibrator 2 and associated with an alarm circuit 8, whereby at a critical gas concentration the multi-vibrator is caused to periodically disconnect the bridge circuit from the D.C. supply 1 and activates the alarm circuit. As applied to measuring methane concentration, the bridge circuit 3 comprises two platinum heaters 21, 22, the latter surrounded by a passive cylinder of aluminium oxide 20 and the former surrounded by a similar cylinder 19 but carrying platinumpalladium catalyst material. The bridge 3 is completed by resistors 23, 24, 25. The normal D.C. voltage from source 1 causes transistor 31 to conduct, followed by transistors 12, 13, whereby the D.C. voltage is fed via transistor 12 to the bridge network 3, whose output is indicated on a meter 4 and is also fed to the control winding 46 on a magnetic amplifier 7. The latter is energized by A.C. from inverter 5 through main windings 41, 42 and its output from winding 45 is rectified at 47 and developed across resistor 16. At a predetermined output from bridge 3 the voltage across resistor 16 blocks multi-vibrator 2 to de-energize bridge 3 and magnetic amplifier 7 until multi-vibrator 2 automatically reverts, the time interval being universely proportional to the gas concentration. During this interval transistor 52 allows A.C. from inverter 5 to energize alarms 57, 59, which continue to operate intermittently with high methane concentration. An electronic relay circuit 6 senses the level of the D.C. voltage 1. If this falls below a value determined by Zener diodes 39, 40, transistors 31, 32 are blocked, followed by multi-vibrator 2 and alarms 57, 59 are continuously energized.
Patent GB-270056-A (GB)
Title: Improvements in means for rotating ratchets, more especially intended for use in operating screw-jacks and the like
IPC: B66F3/14
Filed: 1926-03-22
Abstract: 270,056. Tangyes, Ltd., Chapman, H. W., and Hodgkinson, D. M. March 22, 1926. Ratchet braces.-In ratchet driving mechanism for braces &c. the operating lever F is fitted directly to the tail end of the driving pawl D which is pivoted on a pin E parsing through the cheeks of a frame or housing C freely mounted on the shaft or member carrying the ratchet wheel A. The end of the bar or lever F is formed with lugs f, f<1>, one of which abuts against an extension c of the housing C on the return or inoperative stroke, the lever being dismounted and turned to bring a lug against the opposite side of the extension c to reverse the direction of drive. The Provisional Specification describes also a non-reversible form in which the bar F may be secured to or form an integral extension of the pawl.
Patent GB-975421-A (GB)
Title: Acrylate polymers
IPC: C08L27/06
Filed: 1961-03-03
Abstract: 975,421. Acrylate polymers. ROHM & HAAS CO. March 3, 1961 [March 7, 1960], No. 7919/61. Heading C3G. Solid, thermoplastic, polymeric products are made by polymerizing a charge consisting of monovinylidene monomers and containing at least 80% by weight of one or more C  1 -C 4  alkyl methacrylates in intimate contact with a preformed polymer consisting of units derived from one or more monovinylidene monomers, at least 80% by weight of the units corresponding to one or more C  1 -C 8  alkyl acrylates, the amount of the monomer charge being from 25 to 60% of the combined weight of the charge and the preformed polymer. Other monomers which may be present during polymerization are lower alkyl acrylates, acrylic and methacrylic acids and nitriles, vinyl halides and esters, styrene and vinyl toluene. Such other monomers may also be used in the preparation of the preformed acrylate polymer, except that lower alkyl methacrylates are used in place of the corresponding acrylates. Polymerization of the monomer charge is preferably carried out in an aqueous emulsion of the preformed acrylate polymer. The resulting products, which appear to be graft polymers, are used in blends with vinyl chloride polymers. The examples describe polymerizing methyl methacrylate in emulsions of polymethyl, polyethyl, poly(n-butyl), poly(noctyl) and poly(2-ethylhexyl) acrylates, and poly- (ethyl acrylate-co-methyl methacrylate), and the polymerization of ethyl methacrylate, butyl methacrylate and a mixture of methyl methacrylate and ethyl acrylate in emulsions of poly(2- ethylhexyl)acrylate.
Patent GB-127225-A (GB)
Title: An Improved Door Check and Closer.
IPC: E05F3/02
Filed: 1919-03-29
Abstract: 127,225. Spensers, Ltd., and Summerfield, F. March 29, 1919. Operating doors by springs; checks. -- Relates to door closing and checking devices of the kind comprising a plunger which compresses a spring within a barrel as the door is opened and forms an air check when the door is released, a relief valve being finally opened by encountering a fixed stop, to allow the spring to latch the door. The rod D of the plunger C is secured to a cross-head E, on opposite sides of which are attached an extension rod F and a radius-bar K. The rod F is threaded into a socket G<1> on the cross-head, and into a socket G pivoted on a bracket H fastened to the door. The bar K is pivoted on the cross-head and to a block I secured to the door framing. The relief valve L is contained in a plug J closing the inner end of the barrel A, and provided with cheeks pivoted on a pin M in the block I. The valve is tripped by engagement nf the rounded end of the valve stem j against a fixed cam N, the angular position of which can be adjusted about the pivot M by means of a rod O threaded into a lug i of the block I and secured by nuts o.
Patent GB-345478-A (GB)
Title: Improved float for fishing nets
IPC: A01K75/04
Filed: 1930-03-11
Abstract: 345,478. Fishing net floats. CONTINENTAL GUMMI-WERKE AKT.-GES., 100, Vahrenwalder Strasse, Hanover, Germany. March 11, 1930, No. 7953. Convention date, Jan. 20. [Class 48.] A fishing net float comprising an inflatable member a of rubberized material has a head b made of hard rubber. The upper edge of the member a is secured in a lip d of the head.
Patent GB-407826-A (GB)
Title: Improvements in and relating to sound wave systems
IPC: B64F1/18
Filed: 1933-03-16
Abstract: 407,826. Acoustic directional apparatus. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwvch, London.-(Assignees of Rice, C. W. ; 1161, Lowell Road, Schenectady, New York, U.S.A.) March 16,1933, No. 7988. Convention date, March 16, 1932. [Class 118 (ii).] For marking out a landing field for aircraft a group of megaphones is mounted on each boundary to produce characteristically modulated areas of sound above and along each boundary, the sound being so directed that areas on opposite sides of the field coincide in a prism-shaped region extending across the field and above its centre. By selectively energizing opposite pairs of megaphones and by varying the modulation, the most suitable direction of landing may be communicated. A group of three megaphones 1 is mounted fanwise at the centre of each boundary line. Three high-pitched whistles 2 are supplied with compressed gas from a reservoir 4 when a valve 5 is actuated by cam gear 7 driven by a synchronous motor 6. The motors are supplied with alternating current and are controlled from a central point. Incoming aircraft are fitted with receiving apparatus including a sound filter, and with acoustic sounding apparatus for determining their height when they have got within the soundless area between the megaphones. Radio beacons are employed to guide the aircraft towards the landing-ground. Specifications 346,060, 379,429, and 390,956 are referred to.
Patent GB-263360-A (GB)
Title: Improvements relating to the stud members of snap fasteners
IPC: A44B17/00
Filed: 1926-03-24
Abstract: 263,360. Edkins, W. J. March 24, 1926. Press-button fasteners. -A rigid non resilient stud member for engagement with a spring-sided socket member or with a spring carried by the socket member comprises a support 4 that engages the underside of the crown of the stud 1, the other end of the support forming a flange 5 which engages and serves to support the flange 7 of the attachment eyelet 6. The two flanges are secured by turning over the lower edge 2 of the stud. The support is formed with a closed upper end, as shown, and its main portion is formed of softer metal than flanged end. The eyelet may be made of annealed or soft metal.
Patent GB-669570-A (GB)
Title: Improvements in or relating to metal powder material suitable for powder metallurgical operations
IPC: B22F9/24
Filed: 1949-03-24
Abstract: A method of preparing metal powder for subsequent powder metallurgical operations comprises coating individual particles of a relatively soft and malleable metal powder with a different metal by deposition from a solution, and heat treating the powder at a temperature below the melting temperature of the coating but high enough to cause intercrystalline penetration without substantial alloying.  The coating may be made by chemical deposition or electrolytically.  In one example Fe powder is coated with 2 per cent Ni by deposition from a solution of nickel chloride and the coated powder annealed in a hydrogen atmosphere at 1400-1600 DEG F. for 15-60 minutes.  In another example, the Fe powder is coated with 4 per cent Cr by deposition from a solution of copper oxalate and annealed in a hydrogen atmosphere at 1400 DEG F. for 15 minutes. Further, the iron powder may be coated with 4 per cent Cu and 2 per cent Ni by immersion in the solutions given above in turn and then annealed in a hydrogen atmosphere at 1400 DEG F. for 15 minutes to form a Cu-Ni alloy coating.  1 per cent of graphitic carbon may be added to each of these coated powders before compacting under heat and pressure.
Patent GB-172274-A (GB)
Title: Improvements in electrical starting and energy generating machines particularly suitable for automobile vehicles
IPC: F02N11/04
Filed: 1921-03-15
Abstract: 172,274. Bosch Akt.-Ges., R. Nov. 29, 1920, [Convention date]. Turning-gear.-An electric machine a serves as a starting-motor and as engine-driven generator, the shaft c of the machine being connected to a shaft e by epicyclic gearing comprising planetwheels k<1>, k<2> gearing with two internally-toothed wheels b, m having a different number of teeth. The wheel b has a free-wheel connection r with the casing and the wheel m is fixed on the shaft e, which is connected by gearing f<1>, f<2> to the engine shaft f. In the form shown in Fig. 1, the planet-wheels k<1>, k<2> are freely rotatable on a carrier g keyed upon the shaft c and connected by a free-wheel clutch w to the wheel m. At starting, the wheel b is held by the free-wheel connection r and the motor a drives the shaft e through the epicyclic gearing. When the engine starts, it drives the shaft c through the shaft e and the clutch w, the epicyclic gearing and the ring b rotating as a whole. In a modification, the clutch w is omitted and the planet wheels are connected by free-wheel clutches to hubs fixed upon the carrier g, which is freely rotatable on the shaft c, the planet-wheels being engaged by a pinion on the shaft c. In a further form, the carrier g is keyed upon the shaft c and the planetwheels are mounted on free-wheel clutches; the ring b is held during starting by an annular electromagnet in series with the main exciting coil of the machine a. When the engine starts and the machine a is driven, the current through the electromagnet weakens and the wheel b is released, so that the gearing rotates as a whole. The electric machine a has a motor winding connected in series with the field and the electromagnet at starting, and a generator winding connected with a shunt field winding.
Patent GB-115919-A (GB)
Title: Improvements in Pumps for Exhausting Air and Gases.
Inventor: FLEUSS HENRY ALBERT
IPC: F04B7/04
Filed: 1917-06-05
Abstract: 115,919. Fleuss, H. A. June 5, 1917. Compound piston pumps; valves, arrangement of.-In piston pumps for exhausting air and gases and of the kind in which the cylinder cover forms or contains centrally the delivery valve, with the under surface of which the top of the piston is coned to correspond, and a ram &c. supplies oil to the cylinder, the mechanism for actuating the ram is enclosed in a casing exhausted by a second pump, and the oil is supplied to the cylinder through a spring-controlled valve at the side of the cylinder close to the underside of the delivery valve. As shown, the pump comprises a cylinder a and a piston b with a conical recess b' to correspond with the cover c, which forms the delivery valve and is not reached by the piston. A casing o is exhausted through a pipe q by a second pump, and stuffing-boxes c<1>, d are provided in the cover c and the casing for the piston-rods b<2>. Oil is poured into the casing and fills a cylinder h, whence it enters a cylinder g<2> by ports g<4> and is forced through a pipe j to the cylinder a by a ram g<1>, the stem g of which is depressed against the action of a spring g<3> by a bell-crank lever f actuated by a slide c on the piston-rod b<2>. The pipe j contains a check valve k, and the oil enters the cylinder a near the valve c past a spring-controlled valve at l after the inlet ports n have been covered by the rising piston. To prevent an air or oil pocket from being formed at the bottom of the cylinder a, a slot m extends from one of the inlet ports n to the base of the cylinder, or the piston may be valved. The oil issuing from the cylinder returns through the casing to the ram.
Patent GB-567718-A (GB)
Title: Improvements in electric discharge devices having oxide coated cathodes
IPC: H01J3/02
Filed: 1943-05-21
Abstract: 567,718. Thermionic cathodes. GENERAL ELECTRIC CO., Ltd., and JACOB, L. May 21, 1943, No. 8098. [Class 39 (i)] The supply of barium on an oxide-coated cathode 2 is replenished during normal operation from a barium-containing body 9 which is disposed in the direct path of the electron beam ; barium ions are liberated directly without appreciable heating, and are conveyed to the cathode by the electric field. In the cathode-ray tube shown, the body is supported within the accelerating electrode 8 maintained at a potential not less than 400 volts, at which voltage a current intensity to the body of not less than 10 microamps. is necessary. The bombardment may be intermittent. The body may be turned from a rod of barium or barium alloy, or may have barium deposited on it during manufacture, for example by the decomposition of barium azide.
Patent GB-464004-A (GB)
Title: Improvements in or relating to plate heat exchangers
IPC: F28F3/08
Filed: 1936-03-18
Abstract: 464,004. Plate heat - exchangers. BERGEDORFER EISENWERK AKT.-GES. ASTRA-WERKE. March 18, 1936, Nos. 8155, 8156, 8157, 8158, 8159, and 8160. Convention dates, May 23, 1935, Aug. 3, 1935, Nov. 14, 1935, Dec. 7, 1935, Dec. 7, 1935, and Jan. 8, 1936. [Class 64 (iii)] Apparatus, e.g. for heating milk, comprises a stack of spaced sheet-metal plates having pressed spacing ridges d not exceeding 1À5 mm. in height which direct the milk from an inlet port b to an outlet port e without reversal of flow. The central ridges of the plates may be formed with enlargements h, Fig. 11, to increase the resistance to flow through the relatively short central channels. The plates may be dished around their inlet and outlet ports, as shown in Fig. 5. Alternatively, one plate may be dished and the adjacent plate left plane. The plates may be formed with marginal grooves containing rubber packing rings g, Figs. 8, 9.
Patent GB-439093-A (GB)
Title: Improvements in composition enamels and the process of making the same
IPC: G03F7/04
Filed: 1935-03-15
Abstract: 439,093. Sensitive layers for photomechanical processes. MURRAY, J. J., 42, Alpine Street, Arlington, Massachusetts, U.S.A. March 15, 1935, No. 8182. [Class 98 (ii)] A composition enamel for use in making photogravure printing plates comprises about 20ozs. of glue, 2ozs. of ammonium hydroxide, 64ozs. of alcohol and 1¢ ozs. of chromic acid per gallon. 20 ozs. of an enamel fish glue are first dissolved in 10ozs. of water and 2ozs. of ammonium hydroxide, 1¢ ozs. of chromic acid are added and the mixture is stirred. 64ozs. of alcohol in 8ozs. of water are then mixed with this and the mixture exposed to light from a 1000 watt. lamp for 4 hours, after which it is subjected to heat and pressure in an autoclave for one hour. The composition is hardened by the action of light or heat and does not deteriorate in keeping.
Patent GB-208065-A (GB)
Title: Improvements in hats to facilitate labelling
IPC: A42B1/24
Filed: 1923-03-22
Abstract: 208,065. Holman, W. W. March 22, 1923. Label holders.-To facilitate the identification of hats an opening is cut in the sweat-band behind which is placed a piece of transparent celluloid or the like so formed as to hold a name-card in place. The Figure shows the reverse side of the sweat-band. The celluloid 15 is stitched into the turned-over edge 14 of the band 10 and its edges are turned over as shown at 18 to receive the card 19. To retain the card in place, small tongues 22 are stamped out of the celluloid.
Patent GB-1206163-A (GB)
Title: Improvements relating to blister packs.
Inventor: BADDER PETER THOMAS
IPC: B65B9/04
Filed: 1967-02-21
Abstract: 1,206,163. Packaging machines. ASPRO-NICHOLAS Ltd. 5 Feb., 1968 [21 Feb., 1967], No. 8250/67. Heading B8C. In a machine for packaging tablets &c., a thermoplastic web 1 is heated by a roller 3 and is drawn by suction into cavities 10 in a rotating roll 4, heated to a lower temperature than the roller 3. The tablets are fed into the depressions so formed and a cover sheet 2 is applied. Suction is supplied by a manifold (9), Fig. 2 (not shown) via axial ducts 11, and when the vacuum is released the recess material shrinks on to the cavity. The cover sheet 2 may be aluminium in which case the pressure of a sealing roller 5 will cause a line of weakness in the web around each depression, facilitating package opening by pressing out the contents. Rollers 7 maintain tension in the package strip and a guillotine 8 severs the packs from one another.
Patent GB-885955-A (GB)
Title: Chlorination of zirconium oxide
IPC: C22B1/08
Filed: 1960-03-09
Abstract: Zirconium tetrachloride is prepared by establishing a fluidized bed of granules having a particle size of 10 to 100 mesh (U.S. Standard Sieve size) and so porous that they have a bulk density of 25 to 100 pounds per cubic foot, the granules being prepared from zirconium oxide of particle size below 150 mesh and carbon of particle size below 150 mesh, in an upwardly rising stream of chlorine at a temperature between 500 DEG  and 1100 DEG C, feeding granules continuously to the bed, and condensing zirconium tetrachloride vapour removed from above the bed.  The granules may be prepared by mixing 10 to 50 parts by weight of carbon, at least 10 parts by weight of water, 5 to 50 parts by weight of a binder, e.g. sugar solution, and 100 parts by weight of zirconium oxide, moulding the mixture, baking at 800 to 1200 DEG F and then crushing.  The chlorine is introduced at a rate sufficient to flow out of the bed 1% to 25% of the solids in the bed with the evolved zirconium tetrachloride vapour, to remove impurities, the solids being separated from the vapour in a heated cyclone before the vapour is condensed.  The temperature of the bed is maintained by introducing oxygen with the chlorine and by having surplus carbon in the bed.  The bed may contain 10% to 75% by weight of carbon and 60% to 90% by weight of zirconium oxide. An example is given.
Patent GB-566453-A (GB)
Title: Improvements in and relating to threaded articles
IPC: B23K20/04
Filed: 1943-05-25
Abstract: 566,453. Making nuts and bolts. STEINLE, L. C. May 25, 1943, No. 8328. [Class 83 (ii)] [Also in Group XXV] Plug or ring objects having screw-threads, part screw-threads, or grooves formed thereon or therein have the surfaces to be threaded &c. protected from corrosion by a thin coating of gold or gold-copper alloy, applied electrolytically or otherwise. The threads or grooves are then formed by a rolling or other non- cutting process.