baber/WOPTO huggingface dataset:
Patent GB-707890-A (GB)
Title: Improvements in or relating to magnetic recording apparatus
Inventor: BLAIKLEY ARTHUR STANHOPE
IPC: G11B15/44
Filed: 1951-02-19
Abstract: 707,890. Magnetic sound recording and reproducing apparatus. MAGNEGRAPH RECORDING CO., Ltd. March 11, 1952 [Feb. 19, 1951], No. 3969/51. Class 40 (2). When a switch member 21 is rotated anticlockwise to the "play" position, Fig. 1b, a cam 22 allows an arm 16 to swing about a pivot 18 under the action of a spring 20. As the arm moves, it brings a roller 14 mounted on the arm into contact with a magnetic tape and forces it into contact with a capstan 4, Fig. 3. It also moves a pressure pad 30 to force the tape into contact with a recording head 31, and allows a plate 27 carrying a pulley 25 to swing about its pivot 28 to bring a friction wheel 25a on the pulley into engagement with an enlarged piston 26a of the spindle 26 for the take-up spool. The pulley 25a is driven from a pulley on the roller 14 by a belt 24. In the "off" position of the switch Fig. 1a (not shown), the roller 14 is moved away from the capstan, the friction wheel 25a' is disengaged from the spindle 26, the pad 30 is moved away from the recording head, and a pivoted arm 32 applies a brake 34 to the take up spool. In the "rewind" position Fig. 1c (not shown), the brake is removed from the take-up spool and the arm 17 is moved to bring the roller 15 into engagement with an enlarged part 4a of the capstan to drive the other spool spindle 36a. The enlarged part 4a gives a fast rewind. The recording and erasing heads 2, 3, Fig. 5, are mounted on a channel member which has dimples 10 in its base. By adjusting screws 12 the angle of the heads may be varied, by pivoting the channel about its dimples 10.
Patent GB-1067704-A (GB)
Title: Improvement in the manufacture of textile products in the form of threads, cords, ropes and other similar articles from films of oriented synthetic linear polymeric material, and products obtained
IPC: D01D5/42
Filed: 1966-01-28
Abstract: In a process for the manufacture of textile products in the form of threads, ropes, cords or other similar articles by fibrillating a film of oriented synthetic linear polymeric material and twisting, or twisting together, one or more of the resulting fibrillated films, the stretched film is fibrillated by vigorously projecting on to it, while it is held spread out and under tension, at least one jet of fine solid particles.  The solid particles may be supported by means of a compressed fluid, and desirably the film is sand blasted using compressed air sandblasting apparatus, and as solid particles, angular sand grains, suitably of flint having sharp edges and dimensions between 0.1 and 2 millimetres may be used, or steel shot of substantially the same dimensions.  Suitably the stretched film is less than 0.3 millimetres thick and especially from 0.01 to 0.15 millimetres thick, prior to sand blasting.  The preferred materials are polyolefins, especially isotactic polypropylene, but there may also be used polymers and co-polymers of acrylonitrile, polyvinyl chloride and its derivatives, polyamides and copolyamides, polyesters and copolyesters.  After fibrillation the film is twisted, optionally after super-imposition of a number of films, and then heat set, suitably by steam.  An example describes the production of twine from isotactic polyproylene film.
Patent GB-451600-A (GB)
Title: Improvements in the manufacture of tungsten wire
IPC: C22F1/18
Filed: 1935-02-07
Abstract: A step in the manufacture of tungsten wire comprises the formation of an oxide coating which is subsequently dissolved in sodium hydroxide. The oxide is formed by passing the wire through a quartz tube heated to 1100 DEG  C., through which a current of oxygen is passed in the reverse direction.  Between subsequent drawing operations, the wire is annealed at 1300 to 1500 DEG  C.
Patent GB-975839-A (GB)
Title: Rotary piston internal combustion engine
IPC: F01C1/077
Filed: 1962-02-02
Abstract: 975,839. Rotary-piston internal combustion engines. H. SABET. Feb. 2, 1962 [Feb. 3, 1961; Dec. 14, 1961], No. 4036/62. Heading F1F. A rotary piston internal combustion engine of the geared vane type comprises a pair of vanes A, Figs. 3, 4 rotating at uniform speed and a pair of vanes B rotating at non-uniform speed to vary the volumes of the chambers between the vanes such that combustion gases sucked in through a port Y are compressed, ignited by a spark-plug Z expanded and then exhausted through a port X twice during each revolution. An additional outlet port may be provided between outlet port X and plug Z through which spent gases may be discharged for operating, e.g., a compressor. The vanes A are fast on a shaft 1 carrying arms 11, 12 between which is mounted a rotatable sleeve 22 connected by a pitman arm 21 to a crank-shaft 2 bearingly mounted in a rotatable cage to rotate the vanes B through the meshing of a pinion 24 carried by the crank-shaft with a fixed gear wheel 3 embracing the shaft 1. The vanes A and B are hollow and connected by ducts to a bore in the shaft 1 so that lubricant used for the bearings may be used also as a coolant for the vanes. A box-section flywheel 25 is fitted with a balance weight 13. The combustion chamber 4 is double walled to permit circulation of coolant. In a modified construction, two spark-plugs Z 1 , Z 2 , Fig. 2a are fitted, the fuel mixture being ignited alternately by the two plugs. One pair of vanes 101, Fig. 5, is fast on a hollow shaft 105 and the other pair 102 on a concentric hollow shaft 106. The shafts are inter-connected through the engagement of pinions 109, 109<SP>1</SP>, Fig. 6, with a fixed ring gear 111 and elleptical gearing 112, 112<SP>1</SP>, 113 mounted in a box section flywheel 107. Screws 115 and arcuate slots 114 in the gear ring 111 permit adjustment of the setting of one pair of vanes with respect to the other pair.
Patent GB-510727-A (GB)
Title: Improvements in and relating to electric measuring instruments
IPC: G01R11/36
Filed: 1938-02-09
Abstract: 510,727. Supply meters. BRITISH THOMSON-HOUSTON CO., Ltd. Feb. 9, 1938, No. 4096. Convention date, Feb. 9, 1937. [Class 37] In a disc-armature induction type energy meter, or relay, the magnetic circuit is made up of one-piece laminations 10 and carries a voltage coil 12 and series-connected current coils 13-16, the coils 13, 15 on one side of the disc 11 producing substantially the same current flux as the coils 14, 16 on the other side, thereby balancing out any axial forces produced on the disc due to the current flux resulting from a current surge. The current and voltage flux distributions are shown in Figs. 3, 4 (not shown). The usual shortcircuiting coil or ring 26 for lagging the voltage flux is bent as shown so that the portions thereof located between the legs of the laminations lie also substantially in the centres of the current coils 13, 15. Overload compensation is effected, as described in U.S.A. Specification 1,727,509 by means of saturable magnetic shunts 23, 32 for the current flux and by means of a gap 29 in the current flux circuit bridged by a magnetic piece 30 separated from the magnetic core by non-magnetic spacers 31. Projections 27 on the core provide a short circuiting path for the voltage flux and serve for compensating errors due to damping of the potential flux as described in Specification 281,250, [Class 37].
Patent GB-655076-A (GB)
Title: Improvements in or relating to gaskets for plate apparatus in particular plate type heat exchangers or filter presses
IPC: F28F3/10
Filed: 1948-02-12
Abstract: 655,076. Joint-making packing. CHERRYBURRELL CORPORATION. Feb. 12, 1948, No. 4127. Convention date, Feb. 24, 1947. [Class 122(iii)] [Also in Groups I and XIII] Plate apparatus for heat exchange or filtering purposes wherein a plurality of parallel plates 42 are spaced apart by gaskets 99 each having a foot portion which is seated in a groove 96 in one plate and a crown portion adapted to engage an adjacent plate, is characterized in that each gasket is formed between said foot and crown portions with an intermediate portion which is of greater width than the foot and crown portions and which is adapted to engage the face of the first mentioned plate, adjacent to and on both sides of the groove, so that when the plurality of plates are held in compression, the thrust, instead of being taken by the side walls of the groove, is transmitted through the crown portion of the gasket to the intermediate portion and thus to that portion of the plate adjacent the groove. In the form shown, Fig. 4, the crown portion of the gasket is convex and the foot portion is rectangular, corresponding to the groove in the plate 42 into which it is fitted. At those points in the plates 42 where the groove 96 has an interruption in one or both of its side walls, e.g. at the junction with a branch groove, the foot portion of the gasket is thickened (e.g. as shown in Figs. 10 and 11) to provide the necessary support against the thrust of compression. The plates 42 are the same as those decribed in Specification 655,075, [Group XIII].
Patent GB-427791-A (GB)
Title: Improvements in paint and like brushes
IPC: B05C1/06
Filed: 1935-02-08
Abstract: 427,791. Brushes. BECK, S., 6, Lenaustrasse, Nuremberg, Germany. Feb. 8, 1935, No. 4129. Convention date, Feb. 9, 1934. [Class 19] A paint brush or the like has a marginal row k, Fig. 3, of long bristles and a central portion of short bristles a mounted in channelled strips b, Fig. 1, connected by flexible metal webs d to the stock so that the short bristles a are equally flexible with the long ones. The webs a have tongues e which pass into bristle holders b and are vulcanized in position. The bristles R which are held in a channel in the stock by a girdle a, are inserted by means of a frame i, Fig. 3, having tube holders l and supporting legs n to grip the stock. The frame and holders are slipped off the bristles after they have been fixed in position by binding material h.
Patent GB-807726-A (GB)
Title: Improvements in and relating to a fastening device for securing an article to an apertured support
Inventor: PARKIN LESLIE
IPC: F16B5/06
Filed: 1956-02-09
Abstract: 807,726. Stud-and-socket fasteners; locking bolt-like pins. CARR FASTENER CO. Ltd. Jan. 10, 1957 [Feb. 9, 1956]. No. 4138/56. Classes 44 and 89(1) A fastener-device for engagement with a stud 9, Fig. 2, &c. for securing an article b to an apertured-support a, comprises spaced U-shaped parts 3, 4, Fig. 4 providing a parallel-sided slot 3a between the bases, for gripping the stud. Adjacent arms 1, 2 and 1a, 2a of said parts are interconnected by flanges 5, 6, and the device is passed through the aperture in support to engage the support between the flanges and bent-out-tabs 7, 8. The stud may be integral with the article, e.g. a trim-moulding, name-plate or badge for a motor-vehicle, refrigerator &c.
Patent GB-1083415-A (GB)
Title: Automatic light switch
IPC: H03K17/94
Filed: 1965-01-29
Abstract: 1,083,415. Transistor switching circuits. G. T. BUCKLEY, and J. ROSS. Feb. 26, 1965 [Jan. 29, 1965], No. 4181/65. Heading H3T. [Also in Division G1] A light-sensitive electrical switch comprises a base having a hollow mounting stud and a cover mounted on the base and enclosing an electrical circuit comprising a photo-electric device, a connecting cable passing through the hollow stud and a manual switch protruding through the cover. The photo-electric device may be a CdS photo-resistor R2, Fig. 5, arranged when illuminated to make a transistor TR1 conduct. When the illumination of R2 falls below a predetermined level, TR1 cuts off, making TR2 conduct. This switching action causes more current to flow through the load R4. The load may be a vehicle parking lamp caused to light by the increased current. The electrical components are mounted on a printed circuit-board in close proximity to the base, Fig. 1 (not shown).
Patent GB-545309-A (GB)
Title: A folding jack for use in removing boots
IPC: A47G25/80
Filed: 1941-03-28
Abstract: 545,309. Boot jacks. WILKINSON, T., and ALLEN, J. H. March 28, 1941, No. 4197. [Class 17 (iii)] A boot jack comprises a pair of substantially triangular shaped blocks 5 hinged together at 7 so that they can be folded to superimpose one on the other when out of use, each block being shaped at 9 so that, when in the position of use, they conjointly form a substantially V-shaped gap 10 to engage the boot heel. Each block is fitted with a short leg 12, which is let flush into a recess 13 of a sufficiently greater width than the leg to receive the leg of the other block when the jack is folded.
Patent GB-959937-A (GB)
Title: Improvements in fairleads for cables and ropes
IPC: B63B21/10
Filed: 1963-02-01
Abstract: 959,937. Fairleads. CLARKE CHAPMAN & CO. Ltd., G. T. R. CAMPBELL, and N. V. LASKEY. Feb. 1, 1963, No. 4234/63. Heading B8B. A self-aligning fairlead comprises a sheave carrier 7, Fig. 1, having rollers 11 mounted on its ends and engaging a fixed annular track 3. The rollers 11 have flanged ends engageable with the sides of the track 3 and may comprise one or more cylindrical parts which are freely rotatable on spindles 12. The track 3 may be welded, shrink fitted or keyed in a support frame 2 or may be integrally cast. One of the sheaves 9, 17 may be mounted on a readily detachable spindle 10 for inserting the eye of a rope end.
Patent GB-1240542-A (GB)
Title: Battery charging systems for road vehicles
Inventor: ALLPORT MAURICE JAMES
IPC: H02J7/16
Filed: 1968-01-29
Abstract: 1,240,542. Automatic voltage control systems, JOSEPH LUCAS (INDUSTRIES) Ltd. Jan. 20, 1969 [Jan. 29, 1968], No. 4407/68. Heading G3R. In a battery charging system for a road vehicle of the type comprising an alternatorrectifier 11 and a voltage regulator controlling the alternator field winding 12, the resistance chain 17, 18 of the regulator is connected directly across the battery B and a normallyopen automatically-operable switch 35 is provided to connect the chain 17, 18 across the alternator output in the event of the circuit between members 17, 18 and B being broken. Such a fault closes the switch 35 to connect the resistor 17 to the rectified alternator output provided to the supply line 14, the regulator then continuing to control the field winding 12 in accordance with the alternator output voltage. In the described embodiment the voltage regulator is incorporated within the casing of the alternator and is provided with a terminal 33 for connection to a lead 34 from the positive battery terminal. Should members 33, 34 become disconnected, e.g. failure to reconnect after disconnection during servicing, the terminal 33 is automatically connected to an adjacent terminal which is connected to the alternator output. This is achieved by a spring-loaded blade movable by an insulating plug on the end of lead 34 and arranged so that it contacts or is spaced from the terminal 33 according to whether the plug is absent or present, Fig. 2 (not shown). The voltage regulator is of the type using oscillating on/off transistors having a mark-space ratio determined by the current through a Zener diode 19. Temperature compensation may be provided by a thermistor or by suitable choice of the regulator circuit parameters.
Patent GB-329291-A (GB)
Title: Improvements in or relating to the manufacture of blocks, bricks, slabs and the like, suitable for use in the construction of roads, buildings and other structures
IPC: C04B28/04
Filed: 1929-02-09
Abstract: 329,291. Berry, A. F. Feb. 9, 1929. Composite blocks. - A porous concrete is moulded into blocks, bricks, slabs, &c. having pieces of hard material such as granite or hard metal incorporated in their upper surfaces.
Patent GB-122737-A (GB)
Title: Improvements in Train Pipe Couplings.
Inventor: CHAMPENEY CLIFFORD CHARLES
IPC: F16L27/093
Filed: 1918-03-13
Abstract: 122,737. Champeney, C. C. March 13, 1918. Butt joints; junction pieces.-A bent nose-piece for connecting the hose-pipes of railway heating- systems &c. to the valve-cock casings is held in place by a spider member c which is first screwed into place in the casing (shown dotted) and is provided with a bolt member d adapted to pass through a hole in the nose-piece, when the latter is in place, and receive a securing-nut e. The joint is made tight by packing a<1>, f. The screwed portion of the spider member has slots b<1> to allow accommodation to slight variations in diameter of the threads of existing valve members. The nose-piece has projections adapted to engage the usual hexagonal end of the valve casing to prevent relative rotation.
Patent GB-976419-A (GB)
Title: Improvements in road vehicles
Inventor: ANDERSON GEOFFREY BRIAN
IPC: B62D61/12
Filed: 1962-02-06
Abstract: 976,419. Platform vehicles. CHARLES PITT (BARTON STACEY) Ltd. Feb. 6, 1963 [Feb. 6, 1962], No. 4525/62. Heading B7B. The side and end walls of a body 7 are pivotally mounted at 10 on the chassis 2 of a semi-trailer so that by extending the hydraulic jacks 22 the body may be raised to give direct access to the floor 5 which is then resting on the ground. A cable released ratchet device 25 maintains the body in its erect position. When the body 7 is lowered, operation of the jacks 28 will cause the bar 52 connected to the pistonrods 51 to engage under lugs 53 on the floor 5 and lift it to a raised transport position in which it is retained by spring-applied hydraulicallyreleased bolts 20.
Patent GB-449568-A (GB)
Title: Improvements relating to brake mechanisms
IPC: B61H1/00
Filed: 1935-02-13
Abstract: 449,568. Internalexpanding brakes. PRATT, J. H., and MANLEY, G. E., Guildhall Buildings, Navigation Street, and NEWHUDSON, Ltd., Icknield Street, both in Birmingham. Feb. 13, 1935, No. 4582. [Class 103 (i)] To permit the ready removal and replacement of release springs of internal-expanding brakes an end of the spring is anchored to a crank or equivalent which can be turned from a position in which the spring is relaxed to an over-centre position in which the spring is tensioned and holds the crank against a stop. Each end of the spring 3 is anchored to a crank 4<a> on a spindle 4 mounted each on one of the pair of brake shoes 5. Normally, the cranks are held by the tension of the spring in the lower overcentre position against a stop provided by a recess formed in the shoe and to relax the spring for removal the spindle is turned by a screw-driver to bring the crank to the upper position. Eccentrics may take the place of the cranks.
Patent GB-470421-A (GB)
Title: Improvements in or relating to carrier wave modulation systems
IPC: H03C1/62
Filed: 1936-02-14
Abstract: 470,421. Valve modulating circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., CLOUGH, N. H., and GREEN, E. Feb. 14, 1936, No. 4582. [Class 40 (v)] In a series modulator in which the modulating stage 2 is on the positive side of the carrier frequency stage HFR, the modulating potentials are applied between the grid of the modulator 2 and the negative or cathode side of the high frequency stage. To enable 100 per cent modulation to be effected the arrangement, Fig. 1, necessitates zero voltage across the high frequency stage and earthing of the cathode of the modulator 2. In a modification, Fig. 2 (not shown), this difficulty is avoided by a bias battery between the tapping 16 and resistance 17. In a further modification, Fig. 3 (not shown), the bias source is included in the cathode lead of the valve 14. Floating carrier modulation in which power varies with intensity of modulation may be obtained by applying a bias dependent on the modulating potential to the valve 14. Fig. 4 shows such an arrangement applied to a bank of modulating valves 2.. 2<111> with separate tapping points and biassing sources to secure equality of load between the valves. In a modification, Fig. 5 (not shown), also of the floating carrier type the bias source is in the cathode lead of the valve 14. Specification 427,026 is referred to.
Patent GB-833302-A (GB)
Title: Improvements relating to electric tubular heaters
IPC: H05B3/06
Filed: 1958-02-12
Abstract: 833,302. Direct connections between conductors. VOIGT & HAEFFNER A.G. Feb. 12, 1958 [Feb. 13, 1957], No. 4636/58. Class 38 (1). The heating coil 6 of a tubular heater is provided near one or both ends with a group of closely wound turns 5 which are a tight friction fit on the reduced end 4 of the associated connection bolt 1. Opening out of the turns 5 is said to prevent excessive strain on the coil arising from elongation of the heater tube during manufacture. The coil end may be secured to the bolt 1 by winding it in the screw-thread 3 and rolling over the thread. Alternatively, it may be wedged in a longitudinal groove in the bolt or spot welded to it.
Patent GB-680729-A (GB)
Title: Fuel injection method and apparatus for internal combustion engines
IPC: F02B45/10
Filed: 1950-02-23
Abstract: 680,729. Waste-heat steam boilers. BERLYN, M. J. Feb. 23, 1950. No. 4689/50. Class 123 (ii) [Also in Group XXVII] In a fuel injection device for an internalcombustion engine wherein the fuel is injected by a steam blast the injector 14 is fed with fuel from a tank 12 by a pump 13 and with steam through a pipe 3b from a flash boiler 3 in the exhaust pipe 2, the boiler being fed by a water pump 7 controlled by a steam-pressure responsive piston 11. A temperature responsive element 4 actuates a bellows 5 to bring a burner 6 into operation if the supply of exhaust gas is insufficient to maintain a predetermined steam temperature.
Patent GB-179654-A (GB)
Title: An improved power transmission gear
IPC: F16D45/00
Filed: 1921-02-10
Abstract: 179,654. Fornaca, G. Feb. 10, 1921. Clutches, friction and free-wheel; securing clutches on shafts.-In free-wheel clutch mechanism, particularly applicable to connecting each of a group of motors to a common driven shaft, as described in Specification 177,340. [Class 110 (iii), Turbines &c.], a driving-shaft, Fig. 1, drives the clutch through a spring coupling, comprising driving and driven discs 2, 8 furnished with opposed peripheral flanges 3, 6 defining an annular space. The flanges 3, 6 are provided with aligned radial webs, which divide the annular space into compartments housing springs 5. The disc 8 is integral with a. sleeve 9, on which are mounted two flanged members 10, carrying the pivots 15 of pawls 11 adapted to engage ratchet teeth 12, Fig. 2, on the driven clutch-member 13, which has external teeth 18 to mesh with a gear wheel on the driven shaft, and is carried on ball bearings 14. The pawls 11 are turned outwards by centrifugal force and by springs 15<a>, and are guided into engagement by the inclined ends 17 of spring-pressed pivoted tongues 16. Rigid with the member 13 is the male cone 20 of a manually-operable friction clutch, the female member 21 being slidable on the shaft 1 and pressed by a spring 23. When the friction clutch is put into engagement the motor on the shaft 1 may be started up by the power of those already operative.