baber/WOPTO huggingface dataset:
Patent GB-636835-A (GB)
Title: Improvements relating to tooth-cleaning devices
IPC: A61C17/00
Filed: 1948-05-12
Abstract: 636,835. Teeth cleaning appliances. HUNT, F. C. May 12, 1948, No. 13037. [Class 81(ii)] A tooth cleaning device comprises a flexible arcuate member 1 having spaced pads 3 of substantially tooth size. The member 1 is preferably of H-shape cross - section with the pads on the inner faces of the vertical limbs so that the front and back of both upper and lower teeth can be cleaned at the same time by a transverse motion. If desired the pads may decrease in size towards the rear so as to conform to the tooth sizes and the lower part may be displaced slightly relatively to the upper part.
Patent GB-580847-A (GB)
Title: Improvements relating to dart flights and method of making the same
IPC: F42B6/00
Filed: 1943-08-16
Abstract: A dart flight is formed of the thermoplastic known as polythene and has a central stem with radially projecting vanes moulded integrally with the stem.
Patent GB-450492-A (GB)
Title: Improvements in sleeve valve internal combustion engines
IPC: F01L5/10
Filed: 1935-05-04
Abstract: 450,492. Valve gear. ROWLEDGE, A. J., Ellerslie, Trowels Lane, Derby. May 4, 1935, No. 13307. [Class 7 (vi)] A driving-connection between a sleeve valve d and cranked valve shaft d<1> comprises a socket f integral with the sleeve and sawcut at f<2>, f<3> so as to form two lugs f<4>, f<5>, through which passes a bolt f<6> for clamping in position a bush g adapted to receive a spherical member h in which the crank pin j has a sliding fit. The bush g is cut away at h<1>, Fig. 4, so that the member h can be inserted edge-on into the bush and then turned into position. The sleeve is strengthened by an annular web k.
Patent GB-528758-A (GB)
Title: Improvements in or relating to inner tubes for pneumatic tires and methods of, and mold for, forming said inner tube
IPC: B29D23/24
Filed: 1939-05-04
Abstract: 528,758. Moulding inner tubes for pneumatic tyres. FIRESTONE TYRE & RUBBER CO., Ltd. May 4, 1939, No. 13360. Convention date, May 17, 1938. [Class 87 (ii)] [Also in Group XXIX] An inner tube for pneumatic tyres has a valve stem integrally cast therewith. As shown, an annular mould 11 and core 12 together form a semi-tubular cavity 13, for producing one half of the tube. The core has a pouring sprue 16 and vents 17, and it is formed with flanges 14 which rest on the mould. A valve stem cavity 19 is formed in the mould and in this cavity a valve body 21 is supported by a rod 22, entering the core, and a clamping plate 23. The mould is filled with liquid latex through the sprue 16 and the mould is then heated to coagulate the latex. In a modification the core 12 is dispersed with and the mould filled with latex, a film being then coagulated on the mould and the remainder poured off. Two moulds, each containing a half tube, are placed together, compressed air or steam is forced in through the valve stem, and the tube is vulcanized by heat. The half-tubes are provided with thickened rims 30 so that reinforced inner and outer circumferential junctions are formed between the halves.
Patent GB-920530-A (GB)
Title: Improvements relating to collapsible reflector devices
IPC: F24S23/71
Filed: 1961-04-13
Abstract: 920,530. Utilizing solar heat. UNITED AIRCRAFT CORPORATION. April 13, 1961 [April 13, 1960], No. 13376/61. Class 64 (2). A collapsible reflector device comprises a base plate 2, a plurality of reflector sectors 10 pivotally connected to the base plate 2, a plurality of shafts 6 each of which is connected to one of the sectors 10 and is mounted for rotation in one of the openings 4 in the base plate 2, the sectors having a retracted position (Fig. 1) in which each is disposed axially and substantially radially with respect to the base plate 2, and an open position in which the sectors 10 project radially from the base plate 2 to form a parabola of revolution, and means for moving the sectors from the first to the second position. The sectors 10 concentrate solar radiation on to the boiler 46 positioned at the focal point of the parabola by struts 48, which also serve as fluid conduits. The sectors are moved from the contracted to extended position as follows. Placed in holes 4 are shafts 6 fastened by fingers 8 to the sectors 10. Extending from each shaft is an arm 12 with a ball 14 attached to its end. The balls 14 are placed in grooves 16 of a cam 18, which is rotated by a motor 26 and a gear 28 in contact with. rack 24. The clockwise rotation of cam 18 rotates shafts 6 in holes 4 causing the sectors 10 to move in identical paths inclined to the face 44 until they form a parabola. Solenoids 62 may be actuated by a suitable control mechanism to move one or more of the reflector sectors 10 towards the closed position. The closed reflectors can be encased in a container 50.
Patent GB-1230106-A (GB)
IPC: C10M169/00
Filed: 1968-03-20
Abstract: 1,230,106. Lubricants. DOW CORNING G.m.b.H. 20 March, 1968 [4 April, 1967], No. 13388/68. Heading C5F. Lubricants comprise a base, e.g. an oil or grease, and an iron, zinc or calcium pyrophosphate. The base may be a mineral oil or grease, fatty oils, an alkali metal soap of a C 12 -C 18  fatty acid, aqueous solutions of silicates or phosphates, waxes, polyisobutenes, polyglycols, polyesters, phosphoric acid esters, fluorocarbons, silicones, silicate esters and polyphenylethers.
Patent GB-997127-A (GB)
Title: Resin-impregnated sheets for laminates
IPC: D06N7/06
Filed: 1963-04-04
Abstract: 997,127. Laminates. CASSELLA FARBWERKE MAINKUR A.G. April 4, 1963 [April 4, 1962], No. 13401/63. Heading B5N. Paper and fabrics made from natural or regenerated cellulose fibres which are used in the production of thermosetting laminates, are impregnated with a mixture containing 15-90% of an aminotriazinÚ- or urea-formaldehyde condensation product and 85-10% of a hydroxymethyl compound of a tetrahydros-triazine-2(lH)-one, to a resin content of 20-75%, referred to the total weight of the dried paper or fabric. The hydroxymethyl compounds of the tetrahydro-s-triazine-2(1H)- ones used may be those produced by the condensation of 1 mol. of urea and 2 mols. of formaldehyde together either with 1 mol. of ammonia, an alkylamine or a hydroxyalkylamine or with ¢ mol. of an alkylene diamine, the alkyl and alkylene radicals containing not more than 6 carbon atoms. Unmodified or modified, unetherified or etherified urea- or aminotriazine-formaldehyde resins, e.g. melamine-formaldehyde resins modified with polyalcohols or sugars, may be used. The impregnated paper or fabrics may serve as decorative print sheets, core sheets, balancing sheets, over-lay or underlay sheets or as filler or primer foils in the production of low- or high-pressure laminates. They may be used for coating moulded fibre and chip-boards and may be coated prior to the pressing operation with quick-curing melamine resins. The laminates produced may be coated with a polyester varnish.
Patent GB-343395-A (GB)
Title: Improvements in or relating to sheet lifters for sheet feeding devices
IPC: B65H3/38
Filed: 1930-05-01
Abstract: 343,395. Feeding sheets. ROHRBACHER, H., 62, Winsstrasse, Berlin. May 1, 1930, No. 13412. Convention date, May 23, 1929. Addition to 271,509, [Class 100 (i), Feeding and delivering webs &c.]. [Class 100 (i).] Sheet-separators.-The crank-and-link mechanism described in the parent Specification for moving the suction separator k in the path indicated by dotted lines to carry a separated sheet to the sheetforwarding devices o, y is modified by the employment of intermeshing toothed segments z<1>, z<2> between the crank t and the link l. The desired degree of movement of the separator can thus be obtained by selection of the gear ratio of the segments. In a modification the link l is formed without a slot, and is pivoted directly to a lever f which is oscillated by segmental gears z<1>, z<2> operated as shown in Fig. 1. The spring n is also dispensed with.
Patent GB-587946-A (GB)
Title: Improvements in and relating to hydraulic couplings
IPC: F16D33/04
Filed: 1944-07-13
Abstract: 587,946. Helicopters. BENDIX AVIATION CORPORATION. July 13, 1944, No. 13452. Convention date, July 31, 1943. Drawings to Specification. [Class 4] [Also in Group XXIX] The rotor of a helicopter is driven by an internal combustion engine through a hydraulic coupling, (see Group XXIX). and a speed-reduction gear.
Patent GB-121713-A (GB)
Title: Improvements in and relating to Electric Burglar Alarm Systems.
IPC: G08B13/22
Filed: 1918-08-19
Abstract: 121,713. Tibbles, H. J., and Gunn, Ltd., T. Aug. 19, 1918. Burglar alarms.-An electric alarm of the closed circuit type is provided with means so arranged that the final exit door may be protected, the' main circuit being shunted until the door is locked. Fig. 3 shows one arrangement of the circuits. When the final door 9 is open (or not locked) the switch and a shunt circuit from the battery A through a relay magnet 7 holds up the arm L, opening the circuit from the battery Y through the alarm bell 5 at the contact U. When the door is locked, the switch at 9 is opened, but the arm L is still held up by the high resistance electromagnet K, the circuit being completed from the battery A through the protective devices P and the terminals N, 0, of the devices protecting the door. Should the circuit be opened at any point, the magnet K is de-energized and the arm L drops, thereby closing the alarm circuit from the battery Y. The arm U may be set by hand, and only one relay magnet may be employed. The battery A is preferably formed in a pair, only one of which is in use at a time. Fig. 2 shows a form of contact for use on floors. A sliding rod S connects the contacts Q, Q' but, when the hand S" is depressed, insulating material S' carried by the rod separates the contacts.
Patent GB-1126461-A (GB)
Title: Improvements in or relating to safety razor blades
Inventor: DEACON ROGER FREDERICK
IPC: C21D9/18
Filed: 1964-04-02
Abstract: 1,126,461. Improving physical properties. WILKINSON SWORD Ltd., and UDDEHOLMS A.B. 14 Sept., 1965 [2 April, 1964], No. 13567/64. Headings B3A and B3V. [Also in Division C7] A method of manufacturing razor blade strip from steel which, at an elevated temperature, contains metastable austenite comprises reducing the cross-section of at least one edge of the strip at said temperature to deform the austenite, and subsequently cooling the strip to transform the austenite to martensite. The process hardens the edge and increases toughness, fatigue strength and proof stress. Corrosion-resistant steels that may be used contain 10-20% Cr. They may also contain :- In an example, a strip of blades joined endto-end is annealed at 800-1200‹ C. in a furnace to form austenite. A cooling muffle reduces the strip-temperature as the strip is passed to a press where the edges are deformed between 30 and 95% at 300-800‹ C. An inert or reducing atmosphere, e.g. of cracked ammonia, may be maintained in the furnace, muffle and the press. Instead of using a press, the whole strip may be reduced by rolling or forging to deform the austenite. On leaving the press, the strip is hardened by quenching between water-cooled chill blocks, by natural cooling or by quenching in water or oil. Further cooling to minus 78‹ C. may follow. The edges may be finished at least partly by the electrolytic process described in Specification 1,096,411, to which reference is made. The blades may be given a polymer coating. Specification 1,126,462 is referred to.
Patent GB-1376473-A (GB)
Title: Glass batch and a method for the production thereof
IPC: C03C1/00
Filed: 1972-03-23
Abstract: 1376473 Glass-batch BOUSSOIS SOUCHON NEUVESEL 23 March 1972 [1 April 1971] 13675/72 Heading C1M A glass-batch suitable for producing a glass is characterized by having, prior to granulation, a specific surface area of 1500-7500 cm.<SP>2</SP>/gm., an oversize percentage on a sieve having a mesh size of 150 microns of 0-35% by weight, and an oversize percentage on a sieve having a mesh size of 100 microns of 3-60% by weight. Preferred batches contain an oversize percentage at 60 microns of 20-50% by weight and a percentage by weight smaller than 20 microns of at most 30%. The batch may incorporate for granulation an alkaline lye, sodium silicate or slaked lime. The glass-batch may be produced by grinding the batch material, using a ball-mill, and recycling the particles having a size in excess of 150 microns; 2-10% by weight of the initial batch may be recycled. Prior to grinding the batch material may be dried. An apparatus is disclosed for grinding the batch material in which a dynamic selector of the rotary type separates the particles having a diameter larger than 150 microns. The ground material is granulated in a disc-type nodulizer the rotary plate of which is sprayed with water and the granulated material is then dried in a rotary drum. The batch material is suitable for producing glasses containing, in per cent by weight, 66-75% SiO 2 , 8-18% alkali metal oxides, 6- 15% alkaline earth metal oxides, 0À5-3À5% Al 2 O 3  and optionally sulphur, TiO 2 , B 2 O 3 , ZnO, ZrO 2  and FO 2 O 3 .
Patent GB-143544-A (GB)
Title: Improvements in air pumps
IPC: F04B33/00
Filed: 1920-05-18
Abstract: 143,544. Andrews, L. A. Oct. 26, 1914, [Convention date]. Portable hand pumps.-To maintain in operative condition the piston washer of air-pumps which are particularly suitable for inflating tyres, the washer is expanded at the end of each stroke to a diameter greater than that of the pump barrel. Thus, an enlarged space 2, Fig. 1, is provided into which the piston washer 3 enters as it passes over the expander 5. In the case of a double-acting pump, an enlargement with expander is provided at both ends of the barrel. Fig. 3 shows a doublebarrelled pump in which each piston is expanded in the enlarged end of its barrel. The stuffing- box is packed by the rubber double-cone 32 which is compressed by a screw cap 31.
Patent GB-676632-A (GB)
Title: Method of protecting metals against corrosion and protective preparations therefor
IPC: C23F11/12
Filed: 1949-05-23
Abstract: Base metals and their corrodible alloys are protected by applying to the surface a solution containing less than 2 per cent by weight of a 4-n-alkyl-catechol having 16-18 carbon atoms in the alkyl group in an inert organic solvent.  Specified catechols are p  4-hexadecyl-and 4-octadecyl catechols and mixtures thereof. Preferred proportions are from 0.001 to 1 per cent of the catechol.  Specified solvents are benzene, gas oil, spindle oil, paraffin oil, mineral lubricating oil, pressure oils, transformer oils, turbine oils or petroleum jelly. Emulsifying agents such as water soluble metal or ammonium salts of fatty acids, resin acids or naphthenic acids or glycol ethers of higher fatty alcohols dispersing agents such as fatty alcohol sulphates or water-soluble salts of sulphonic acids, and passivators such as a water-soluble nitrite may also be present.  U.S.A. Specification 2,429,905 is referred to.
Patent GB-824573-A (GB)
Title: Improvements in or relating to the separation of isobutylene from mixtures of hydrocarbons
IPC: C07C7/171
Filed: 1957-04-30
Abstract: Isobutylene is separated from hydrocarbon mixtures by absorption in 45-55% by weight aqueous sulphuric acid, the alcohol so formed is separated from the acid extract obtained without dilution by heating in the top of a distillation column and the distilled alcohol is fed into the lower or central portion of the column where it is dehydrated by the descending acid to give pure isobutylene, the acid being withdrawn from the base of the column and recycled to the absorption stage.  The acid used is preferably about 50% by weight. In a preferred embodiment the hydrocarbon mixture, e.g. a liquid mixture of butanes and butenes from line 1 is mixed at a temperature of 20 -50 DEG  C. with sulphuric acid from line 3 in a reactor 2, where the pressure is super-atmospheric, e.g. 5-7 kg./cm.2, whence it passes to <PICT:0824573/IV (b)/1> the decanter 5.  The upper hydrocarbon layer still containing some isobutylene is further extracted in column 7 with recycle acid from line 8, to which may be added acid containing isobutylene by line 91, unabsorbed hydrocarbons leaving by line 71 and the acid extract being led by line 3 to the first extraction stage.  If, however, the upper hydrocarbon layer from decanter 5 still contains considerable quantities of isobutylene a further extraction zone identical with 2 may be inserted.  The acid extract in line 9 preferably has a molar ratio of hydrocarbon to acid between 0.3 and 1 to 1 and is introduced at atmospheric pressure into the top of column 10 which preferably has a top temperature of 70 -80 DEG  C. and a base temperature of 126-128 DEG  C. Tertiary butyl alcohol and water leave as distillate and enter column 14 which gives as distillate a water-alcohol azeotrope and as bottoms water which may be returned to column 10.  The alcohol and water azeotrope is reintroduced to column 10 by line 15 at a point where the temperature is 90-100 DEG  C.  Isobutylene leaves through rectifier 17 and is washed in column 18 before leaving by line 21.  Acid is withdrawn from the base of column 10 and recycled by line 8.
Patent GB-459994-A (GB)
Title: Improvements in fluid controlled clutch and brake mechanism for presses and other machinery
IPC: F16D67/04
Filed: 1936-05-15
Abstract: 459,994. Combinations of clutches with brakes. KLOCKE, W., 8906, 97th Street, Woodhaven, New York, and CARTER, L. H., 2903, Ludlow Road, Cleveland, Ohio, both in U.S.A. May 15, 1936, No. 13823. Convention date, May 15, 1935. [Class 80 (ii)] In combined clutch-and-brake mechanism for presses or other machines, a plate clutch 10 is engaged by a pneumatic servomotor 12 acting through levers 40 on adjustable studs 43 secured to a presser plate 37 and is disengaged by springs 53 acting on the levers 40, while a brake 14 is applied by springs and is released by a pneumatic servomotor 16, the supply of pressure fluid to the servo 12 being controlled bythe piston of the servo 16 so that the brake is released before the clutch is engaged, and the clutch is disengaged before the brake is applied. As shown in Figs. 2, 3 and 4, the servo 12 comprises an annular piston 57 arranged in a cylinder formed in a block 60 which is either fixed or free on the machine shaft 25. The brake comprises shoes 72, 73 coacting with a drum 70 secured on the shaft 25 and controlled by a cam shaft 87 to which is secured a lever 95, one end of which is acted on by a spring 100 while the other end is acted on by the piston 112 of the servo 16. With the latter in the brake-applied position, as shown in Fig. 4, the servo 12 is in communication with vent holes 140 in the cylinder 110 of the servo 16 through passages 124, 125, 128 in the shaft 25 and block 60, conduit 132, and port 136, so that the clutch is disengaged by the springs 53. Pressure fluid is supplied to the servo 16, to release the brake, through a conduit 120, and the piston 112, in its movement, covers the port 136 and uncovers a port 135 leading to the conduit 132, whereby pressure fluid also passes to the servo 12. In the form shown in Fig. 5, the annular pistons 160, 161 of the servos 12, 16 are both arranged in cylinders 155, 156 formed in a block 150 secured to the shaft 25. The brake comprises a cone 173 secured to the piston 161 and urged into contact with a fixed cone 170 by springs 180. With the servo 16 in the brakeapplied position, as shown, the servo 12 is vented through passage 197, ports 198 and 199, and a groove 201 in the piston 161. Pressure fluid is supplied to the cylinder 156 through passages 190, 191, 194 in the shaft 25 and block 150, and the piston 161 in its movement cuts off communication between port 198 and groove 201 and then uncovers port 198.
Patent GB-1498725-A (GB)
Title: Synchronous demodulator circuit
IPC: H02J3/08
Filed: 1975-04-04
Abstract: 1498725 Synchronous demodulators WESTINGHOUSE ELECTRIC CORP 4 April 1975 [11 April 1974] 13882/75 Heading H3A A synchronous demodulator suitable for use in a three phase power supply system for correcting voltage or phase unbalances comprises a circuit 22-24 for generating from an input signal # B  with a variable waveform two signals with 180 degree phase displacement, a device z 2  for switching the two signals in synchronism with a reference signal from Q 1  to the inverting input of an amplifier z 1  having a non-inverting input for connection to a reference level and an output for a demodulated signal representing the phase and amplitude relationship between the phase-displaced signals and the reference signal. A reference signal # B  with a 90 degree lag is obtained by applying signals # B , # C  to the base of a transistor Q 1 . The device z 2  may be a gate controlled two-channel input amplifier or a multiplier circuit. Fig. 4 (not shown) relates to circuit arrangements for the blocks 12, 28.
Patent GB-681229-A (GB)
Title: Improvements in or relating to the manufacturing of citrates, particularly for use in the manufacture of processed cheese
IPC: A23C19/082
Filed: 1950-06-02
Abstract: Sodium citrate is made by reacting sodium sesqui-carbonate with citric acid in the presence of an amount of water that ensures, under conditions of initial heating and constant agitation, the formation, during cooling and continued agitation, of a fine-grained powder of sodium citrate having a water of crystallization content between 5.5 and 2.0 H2O.  The term sodium sesqui-carbonate includes the formation equivalents thereof, i.e. equimolar amounts of the carbonate and bicarbonate. The acid may be gradually added to the sesqui-carbonate containing 10-15 per cent of water agitated in a steam heated pan until evolution of CO2 ceases and a thick, homogeneous cream is obtained which on cooling yields a fine-grain powdered product having about 5.5 mols. of H2O.  The 2.O or intermediate H2O forms may be obtained by continuing the heating to drive off water vapour.  The product is used in the processing of cheese particularly when admixed with a phosphate such as disodium orthophosphate.  Specification 423,844, [Group I], is referred to.ALSO:Sodium citrate, made by reacting sodium sesquicarbonate with citric acid in the presence of an amount of water that ensures, under conditions of initial heating and constant agitation, the formation, during cooling and continued agitation, of a fine-grained powder of sodium citrate having a water of crystallization content between 5.5 and 2.0-H2O, is used as emulsifying agent in the reprocessing of cheese.  The term sesquicarbonate includes the formation equivalents thereof, i.e. equimolar amounts of the carbonate and bicarbonate.  The citrate may be used admixed with an alkali or acid phosphate, e.g. phosphates of sodium such as di-sodium orthophosphate, and when a mixture with the latter compound is desired the process of Specification 423,844 may be followed by melting the orthophosphate and adding the sesquicarbonate and citric acid together with sufficient water to give the desired amount of water of crystallization in the product.