baber/WOPTO huggingface dataset:
Patent GB-752281-A (GB)
Title: Engine starter gearing
IPC: F16D41/22
Filed: 1954-06-25
Abstract: 752,281. Turning-gear. BENDIX AVIATION CORPORATION. June 25, 1954 [June 30, 1953], No. 18722/54. Addition to 702,978. Class 7(5) In a modification of the starter drive of the parent Specification centrifugally-actuated balls 47 disconnect and hold the driving clutch member 7 out of engagement with the driven clutch member 6 as long as the latter rotates above a given speed. Rotation of the power shaft 1 is transmitted through the sleeve 2, spring 17 and driving clutch ring 8 to the screw shaft 5, thereby causing traversal of the nut 21, barrel 24 and hence the pinion 18 into mesh with the engine gear 19, whereupon it abuts the ring 32; the screw shaft 5 moves to the left compressing the spring 17 until the clutch ring 8 is arrested by a thrust washer 11. The' clutch teeth 6, 7 are pressed together by the screw jack action of the screw shaft 5 and nut 21 and torque is applied to the pinion to crank the engine. When the latter fires, the pinion speed exceeds that of the engine so that the nut 21 threads back along the screw shaft until the latch 37 engages a shoulder thereon and the screw shaft overruns the clutch ring 8 and causes the balls 47 to move outwardly to engage an inclined surface 48, wedging the teeth 6, 7 apart against the action of the spring 35; the latch 37 is then centrifugally withdrawn to allow the parts to return to the idle position where they are yieldably maintained when the latch 37 engages another screw shaft shoulder 39. The balls 47 are contained within a housing comprising a disc 43 fixed to the ring 8 and a dish-shaped member 44 secured to the screw shaft, recesses 50 in the member 44 ensuring that the balls 47 rotate with the latter.
Patent GB-198247-A (GB)
Title: Improvements relating to the renewal of the filaments in thermionic valves or for otherwise repairing the same
IPC: H01J9/50
Filed: 1922-07-08
Abstract: 198,247. Colebrooke, A. H. S., and Williams, W.. A. July 8, 1922. Vacuum tubes. - A method of renewing the filament of a thermionic valve consists in weighting the end of the filament or a cord connected therewith, and holding the valve so that the weight may fall by gravity through a helical grid, drawing after it the filament which is then secured to leading-in wires and the surplus ends cut off. In a valve having a spherical bulb, the bulb may be opened at the pip 1 or at points opposite to the ends of the grid 7. A lead or other weight 3 on the end of a cord 4 connected with the filament 5 is inserted through the opening by means of pliers 6 and falls through the grid. The filament is secured to the hooked ends 8 of leading-in wires 9. In a valve having a tubular bulb a slightly modified method may be used and the bulb may be cut annularly so as to separate it from the neck.
Patent GB-733026-A (GB)
Title: Improvements in or relating to rotary wing aircraft
IPC: B64C27/473
Filed: 1953-07-07
Abstract: 733,026. Rotor blades for helicopters. UNITED AIRCRAFT CORPORATION. July 7, 1953 [Oct. 1, 1952], No. 18789/53. Class 4. A rotor blade for a helicopter comprising a profiled spar 10 and faired trailing edge pockets 12 adhesively bonded thereto is balanced by a series of weights 34 each'grooved longitudinally to engage an opposed pair of a number of reinforcing leads 32 formed internally on the spar 10. Resilient strips 46 are disposed between the weights and the beads and the weights are formed with bores 52 which may be filled selectively with lead. The weights, which are inserted through an aperture at the tip of the blade formed with a removable cover, may be clamped in position to prevent spanwise movement under the action of centrifugal force. Specification 732,966 is referred to.
Patent GB-921398-A (GB)
Title: Aircraft
IPC: B60V1/00
Filed: 1961-05-25
Abstract: 921,398. Jet propulsion plant. W. A. HOWIE. May 25, 1961 [June 15, 1960], No. 18855/61. Class 110 (3). [Also in Group XXXIII] An aircraft jet propulsion plant comprises two gas turbine engines 124, each located in a duct 120 with radial clearance and supplied from an inlet 121 controlled by a flap 123. The turbine exhaust, together with air entrained around engine 124 is discharged through an afterburner (not shown) and a nozzle 125. Lifting force, or further propulsive force, is supplied by turbo-fan engines 112, each located in a duct 110 fed from an inlet 108 controlled by flap 113 and discharging into the throat of a convergent-divergent duct 102 running through the aircraft, so as to entrain air through the duct inlet 103 and discharge it through an outlet 104. In a modification, Figs. 5 and 6 (not shown), the engines 112 are replaced by gas turbine engines located in the duct inlet 103, and air is entrained from ducts similar to ducts 110.
Patent GB-363296-A (GB)
Title: Improvement in surface plates
IPC: G01B5/28
Filed: 1931-06-30
Abstract: 363,296. Surface and outline gauges. AKTIBOLAGET C. E. JOHANSSON, 46, Nygatan, Eskilstuna, Sweden. June 30, 1931, No. 18875. Convention date, July 2, 1930. [Class 106 (ii).] The test surface of a surface plate is made up of a series of knife edges or of points in the same plane. A series of parallel V-grooves 2 or U-grooves 4 forming knife edges 3, 5 respectively are cut in a steel plate 1; or these parallel grooves may be crossed by similar parallel grooves at right-angles to form a series of points 6 at the intersections.
Patent GB-874007-A (GB)
Title: Improvements in or relating to flexible hose
Inventor: WILSON MARTIN WESTBURY
IPC: F16L11/15
Filed: 1956-06-19
Abstract: 874,007. Flexible hose pipes. COMPOFLEX CO. Ltd. Sept. 13, 1957 [June 19, 1956], No. 18889/56. Class 99(2). In a flexible hose comprising a seamless convoluted tube and a reinforcing braiding sheath, a protective sheath of helical overlap metallic strip is provided between the convoluted tube and the reinforcing braiding. As shown the convoluted tube 10 is of stainless steel and the protective sheath 11 is of bronze. The braiding 12 is of stainless steel wire. In a modification the protective sheath is a tinned steel sheath having interlocking overlap and the braiding is of bronze wire. According to the Provisional Specification a braided protective sheath made of ribbon like elements may be arranged between the convoluted tube and the usual wire braiding. Alternatively the protective sheath instead of being metallic could be of plastic material such.as polytetrafluoroethylene, glass cloth or nylon.
Patent GB-602006-A (GB)
Title: An improved process and apparatus for the manufacture of nitro-phosphate fertilisers
IPC: C05B11/06
Filed: 1945-07-24
Abstract: A process for the production of nitrophosphate fertilizers consists in first effecting a partial, say 20-40 per cent, solubilization of calcium phosphate by means of nitrogen oxides, and in then completing the solubilization by nitric acid.  Water vapour from the mixer employed in the second stage may pass to the first stage, and may be supplemented by an additional amount.  The pasty product from the mixer may be granulated by mixing with or without cooling, or by mixing with granulated products or powdered wastes resulting from a previous operation.  The nitrogen oxides used may be obtained by the oxidation of ammonia or of the nitrogen in air in an electric arc. Specification 598,579 is referred to.
Patent GB-729194-A (GB)
Title: Colloidal silica products
IPC: C01B33/187
Filed: 1953-07-08
Abstract: A finely divided product comprising silica together with a basic compound of a metal whose salts form a precipitate with alkali metal silicate in aqueous solution, for example, zinc, magnesium or aluminium, is precipitated by interacting in aqueous solution an alkali metal silicate and a salt of the said metal in the presence of an alkaline reacting salts, for example, an alkali metal carbonate or sulphide.  If an aqueous solution of sodium silicate containing sodium carbonate is reacted with an aqueous solution of a zinc salt a precipitate comprising silica, zinc hydroxide and basic zinc carbonate is produced which, after drying and grinding, may be used as such as a rubber filler and also as an activator instead of zinc oxide.  The product may be heated to 300-700 DEG  C. in order to convert the basic zinc carbonate to zinc oxide.  By decomposing a product containing zinc with acid, for example, hydrochloric acid, a very finely divided silica is obtained which may also be used as a rubber filler.
Patent GB-791730-A (GB)
Title: New glass batches
IPC: C03C13/00
Filed: 1956-06-20
Abstract: 791,730. Glass. SOC. ANON. DES MANUFACTURES DES GLACES ET PRODUITS CHIMIQUES DE ST.-GOBAIN, CHAUNY & CIREY. June 20, 1956 [July 5, 1955], No. 19059/56. Class 56. Glasses particularly for fibre-making comprise (percentage parts by weight) less than 5 B 2 O 3 , 55-68 SiO 2 , some Al 2 O 3  such that B 2 O 3 +SiO 2 -+ Al 2 O 3  is between 67 and 72 ; 7-10 CaO, 2-5 MgO and 11-14 alkali, the ratio MgO : CaO being between 0À3 and 0À5 and the ratio CaO : SiO 2  being less than 0À16. Optional constituents are up to 5 of F, up to 5 of TiO 2  and/or ZrO 2  and up to 5 of BaO and, in particular examples, fractional percentages of SO 3 , MnO and Fe 2 O 3  are mentioned.
Patent GB-738802-A (GB)
Title: Method of and means for gauging the paths of the moving parts of a lathe or like machine tool
IPC: B23Q16/00
Filed: 1953-07-09
Abstract: 738,802. Machine-tool details. JEANNERET, J. L. July 9, 1953 [Aug. 4, 1952], No. 19091/53. Drawings to Specification. Class 83 (3). A method of gauging the extent of the reciprocatory moyements of parts of a lathe or like machine-tool comprises the use of a series of gauges for each relative reciprocatory movement between two parts, the gauges of each series having a same prismatic or cylindrical cross-section differing from that of the other series, and each held selectively throughout its length inside a groove of corresponding cross-section attached to or formed in one of the reciprocating parts so as to act as a direct abutment defining the movement of said other part. The gauges of the different series are also distinguished by their colour which matches that of the co-operating groove in which they are to be mounted. When not in use on the machine the gauges are mounted on a board having recesses corresponding to the cross-sections of the gauges.
Patent GB-1069085-A (GB)
Title: Tensioning device
IPC: G01L5/06
Filed: 1964-05-08
Abstract: 1,069,085. Tensioning and liquid treating elongate materials. G. A. HALLIDAY. May 8, 1964 [May 15, 1963], No. 19253/64. Headings DID and D1L. A device for tensioning an end 28 e.g. of roving ribbon or glass fibre strand particularly in the fabrication of articles by winding resin wetted glass fibres on a mandrel, comprises a vessel 14 containing a liquid e.g. an epoxy resin, means, e.g. an eyelet 20 and grooved rods 22, 24, 26 to guide the end through the liquid and close to wall means, preferably in the form of a V-shaped groove formed between faces 32, 34, such that the liquid on the surface of said end is in slipping relation with said wall means thereby to tension the end. As shown the vessel 14 floats on a liquid 12, e.g. glycerine, in a fixed container 10 and is attached to a fixed post 19 by a wire 16 and spring balance 18, the balance showing the tension in the running end. The grooved guide rod 22 in liquid 30 under which the end passes is mounted on a pivoted shaft 36 having an upstanding arm 38 which passes through an opening in a plate (42) see Fig. 3, not shown, mounted by screws (44) to be adjustable in the direction of end travel on the fixed lid of vessel 10 thus when the tension in the end tends to increase e.g. by increase in speed due to increase in diameter of the object being wound, and the vessel 14 moves forwards against the spring balance 18, the lever 38 engages the plate (42) to rotate the assembly 38, 36, 22 clockwise, raise the rod 22 and so lift the end higher in its groove thereby decreasing the drag imposed on it by the groove; by a suitable arrangement of dimensions the tension in the end can thus be maintained substantially constant. To maintain the viscosity of the liquid (30) at a desired value the liquid 12 may be heated. Several ends may pass, side by side through a single vessel 14.
Patent GB-712017-A (GB)
Title: Improvements in or relating to tubular condensers
Inventor: BAUDY LUCIEN
IPC: H01G4/228
Filed: 1952-07-30
Abstract: 712,017. Condensers. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. July 30, 1952, No. 19313/52. Class 37. Electrical connections to a tubular ceramic condenser having internal and external electrode coatings comprise an externally fitting conducting cylindrical socket extending over the whole length of the external coating and threaded on part of its length to receive a clamping nut and an internally fitting thin conductive tube which may be clamped to a conductor passing therethrough; the connections being soldered or welded to the respective electrodes. In Fig. I a tubular ceramic condenser 4 having external and internal silver electrode coating is fitted within a closely fitting socket member of equal length having a hexagonal head I and a shank which is partially threaded to take a panel clamping nut 2 and prolonged into a parallel shank 3 of smaller external diameter. A chamfer 5 at the head and an increased internal diameter at the other end accommodate welded or soldered joints to the external electrode coating. In Figs. 2, 3 connection to the outer electrode is made by a socket 7 as shown in Fig. I, and a thin hardened copper tube 8 formed with throats 9, 10, 11 surrounding a main conductor 12 passes through the interior bore of the condenser. The tube is welded or soldered to the inner electrode at throats 9, and throats 10, 11  of the tube which may be longitudinally slotted at the ends are clamped to the conductor by screw clamps fitted thereover, with or without soldering. The conductor may be a rod or tube of soft copper or brass passing directly through the condenser and formed with depressions at each end of the ceramic tube to facilitate welding or soldering to the interior electrode. (Figs. 5, 6 not shown.)
Patent GB-798480-A (GB)
Title: Improvements in or relating to centrifugal compressors
Inventor: BORDEN DAVID MERING
IPC: F02C3/10
Filed: 1955-07-04
Abstract: 798,480. Centrifugal compressors. CHRYSLER CORPORATION. July 4, 1955, No. 19313/55. Class 110 (1). A centrifugal compressor comprises blades extending generally radially from an impeller hub and supported thereby against axial and rotational movement relative to the hub but supported against radial movement only by an annular shroud closely encircling the radially outer ends of the blades. A compressor comprises an impeller hub 61, Fig. 1A, and an inducer hub 17, held together and to the rotor 35 of the driving turbine by means of a tie-rod 44 screwed into the hub 17 at 65. The inducer shroud 58 is supported at 55 by the impeller shroud 48, the connection being by brazing or a force fit. Inducer blades 72, 73 may be attached to the hub 17 by means of integral portions 70 which fit into slots in the hub. Preferably, the slots are formed so that the chordal lines of blades 72 are nearer the axial direction than those of blades 73, and the exit angle of blades 72 may be substantially equal to the entrance angle of the impeller blades 45. The chord length of the inducer blades is substantially proportional to the radial distance from the impeller axis. The inducer blades may be of plastics material and of aerofoil or laminar section. In the embodiment shown in Fig. 2, inducer blades 156, 172, 173 are carried by hubs 155, 161, 165 respectively, the hubs being secured to the shaft 44 by a key 175 and a nut 167. The impeller 112 is fixed to the shaft 44 by pins 152 and a flanged member 153. The blades 156 form continuations of the impeller blades 145 and may be cast integral with the inducer shroud 158 and hub 155 or welded thereto. The blades 172, 173 are supported by pins 174 engaging holes in the shroud 158 and by root portions which engage slots in the hubs 161, 165 and respectively abut against an axial extension 164 of the hub 165 and against the nut 167. In a further embodiment, the inducer blades are formed with roots 271, Fig. 5A, which fit into slots in the respective hubs, axial displacement being prevented by engagement of the roots against the adjacent hubs or hub-securing nut. As before, the blades may be supported at their outer ends by pins engaging the inducer shroud.
Patent GB-749083-A (GB)
Title: Improvements in or relating to multi-position electric switches
IPC: H01H9/00
Filed: 1953-06-13
Abstract: 749,083. Regulating switches; switches held set and freed mechanically. GENERAL ELECTRIC CO., Ltd., and BRYER, R. F. June 17, 1954 [June 13, 1953], No. 19369/53. Class 38(5) In a switch as disclosed in Specification 677,629 in which a pair of spring-plunger contacts 21 are rotated over a series of twelve fixed contacts 20 connected to tappings on an auto-transformer 17, the arrangement being such that the movable contacts alternatively engage the same fixed contact and then a pair of adjacent fixed contacts so as to give twenty three different voltage outputs, a pair of auxiliary switches 14, 15 are provided controlling an auxiliary transformer winding 18 whereby forty six different voltage outputs can be obtained at the terminals 23, 24. The contacts 21 (shown only in Fig. 3) are driven by a shaft (Fig. 2, not shown) through a concentric manually operable spindle 2, there being a lost-motion driving connection between the shaft and spindle constituted by bolts 5 on a toothed wheel 3 secured to the spindle 2 which cooperate with arcuate slots 12 in a disc secured to the shaft. The shaft is advanced in 15 degree steps by positioning means (not shown), and the angular extent of the slots 12 is such that with the bolts 5 at the slot centres, the spindle 2 may be rotated through 7¢ degrees before the shaft is operated. Levers 6, 7 pivoted at 8, 9 and biased together by a spring 13 have projections 10, 11 co-operating with the twenty four teeth 4 on the wheel 3 and control respectively the auxiliary switches 14, 15, the arrangement being such that when one projection is between two teeth and its auxiliary switch thereby closed, the other projection is on the crown of a tooth and its auxiliary switch thereby open. The spindle 2 is advanced in 7¢ degree steps to move the wheel 3 through half a tooth pitch, the lost-motion connection causing the shaft to be operated for every two steps of the spindle. Thus for each of the twenty three positions of the contacts 21 there are two positions of the switches 14, 15, viz. switch 14 open and switch 15 closed, and switch 14 closed and switch 15 open. The number of turns on the winding 18 is one quarter that between any two adjacent taps 20.
Patent GB-864524-A (GB)
Title: A new or improved device for use in grinding twist drills
Inventor: WEBSTER JOHN SAMUEL
IPC: B24B3/24
Filed: 1956-06-22
Abstract: 864,524. Grinding twist drills. SHEFFIELD TWIST DRILL & STEEL CO. Ltd. Sept. 5, 1957 [Jan. 22, 1956], No. 19387/56. Class 60. A device for supporting a twist drill 1 during the grinding of its point comprises means for gripping the drill on a carriage 25 which is supported for rotation about the cone axis C of one end face of the drill and bodily adjustable, relative to the supporting means, in a direction inclined to a plane passing through the drill axis D and lying parallel to the cone axis, whereby the apex length and offset dimension of the drill are simultaneously increased or decreased to suit a drill of larger or smaller diameter respectively. The drill is mounted on the carriage by means of an adjustable tail stock 26 and jaws 9 which engage the flutes of the drill and are secured to blocks 10 in housings 15 pivotally-mounted upon spindles 11 on a jaw block 3. The jaws can be adjusted to suit different diameter drills by a clamping screw 12, which is centralised by nuts 24, engages right and left-hand threaded bushes 14 on the housings 15 and is rotatable by means of a handwheel 13 provided with radial slots 13d which can be engaged by a projection 13a on a pivoted lever 13b to provide additional leverage to the handle. The jaws are also adjustable tangential to the drill by screws 10b moving the blocks 10 on the housings 15, screws 10a locking the blocks in their adjusted positions which can. be determined by scales 10c and index marks 10d. The drill can be adjusted so that it is presented at the correct chisel angle (i.e. the angle between the lip edge of each end face of the drill and the line along which these faces intersect) to a plane grinding surface by rotation of the jaw block 3 about the drill axis on a bracket 17 which has an arcuate groove engaged by a ridge on the jaw block 3, a scale 5 and index 6 providing means for setting the block. The bracket 17 forms part of the carriage 25 and is secured to a shaft 18 which engages a splined nut 19 in a bracket 20; flexible oil seals 18b, 18c are provided between the shaft and nut. The other end of the shaft threadably engages a screw 21 which can be rotated by a handle 22 and is prevented from axial movement by an end cap 23 secured to the bracket 20. Axial adjustment of the shaft 18, which can be measured by a scale 28 and index 27, is made by rotating of the screw 21 and varies the minimum perpendicular distance between the drill axis D and cone axis C and also adjusts the apex length of the drill (i.e. the minimum distance between the apex of the cone and the outer edge of the end face of the drill). A locking bar 20a clamps the shaft in its adjusted position. The bracket 20 is rotated about the cone axis C to present one end face of the drill to the grinding surface, the drill then being repositioned in the jaws to grind the second face.
Patent GB-1471379-A (GB)
Title: Stop-motion electrical circuit for a knitting machine
IPC: D04B35/16
Filed: 1974-05-02
Abstract: 1471379 Knitting machines VYZKUMNY A VYVOJOVY USTAV ZAVODU VSEOBECNEHO STROJIRENSTVI 2 May 1974 19387/74 Heading D1C An electrical stop-motion circuit for a knitting machine responsive to yarn-breakage comprises a system 2 of parallel-connected branches each with a switch 3 which closes on breakage of an associated yarn connected in series with a circuit element 6 across which a voltage appears when one of the switches 3 closes and, in parallel with the system 2 and element 6, a semiconductor switch 7 which is operated by said voltage and a circuit element 1 which is actuated thereby to stop the machine. The yarn-monitoring branches comprise indicating devices 4 with shunts 5, Element 6 may be a diode, a plurality of diodes in antiparallel connection, a transistor, thyristor or triac. Element 1 may be a relay or contactor. Switch 7 may be a transistor, thyristor or triac, where element 6 is a controlled semiconductor device as shown a bias voltage is applied by a resistor 8.
Patent GB-193991-A (GB)
Abstract: 193,991. Snow, C. S. H. Dec. 6, 1921. Two-stroke-cycle engines. -Two cylinders a arranged side by side and driving opposite cranks have their charges augmented by a double acting, pump piston g which helps to compress charges in the crank chambers. Air is drawn into the crank chambers through ports j in the cylinder heads and transfer pipes k and mixture at the same time through ports d. The air enters the cylinders through the valves m before, the mixture.