baber/WOPTO huggingface dataset:
Patent GB-690604-A (GB)
Title: Improvements in or relating to control systems for operating a direct-current electric motor from an alternating-current line
IPC: H02P7/30
Filed: 1951-09-21
Abstract: 690,604. Automatic speed control systems. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. Sept. 21, 1951 [Oct. 2, 1950], No. 22149/51. Class 38 (iv). [Also in Group XXXVII] In an automatic speed control system for a separately excited D.C. motor, the armature of the motor being supplied from an A.C. supply via a saturable reactor in series with a rectifier, the armature voltage is compared with a reference voltage tapped off the field supply and the resultant controls the saturation of the reactor. The motor armature 5, Fig. 1, is supplied (via switch 22), from the rectifier 12, the input to which is controlled by the saturable reactor 13. The motor field 6 is supplied from rectifier 7 via a rheostat 8. A potential divider 9, 10 is connected across the motor field, and the voltage tapped off is applied to the control field 18 of the reactor in opposition to the armature voltage (connected via switch 23 and resistor 25). A capacitor 26 is connected across the control winding and the time constant of resistor 25 and capacitor 26 provides for the gradual acceleration of the motor when starting. When the armature voltage drops below the reference voltage, the rectifier 24 conducts and the output voltage of the rectifier is increased to correct the fall in motor speed. In another embodiment, Fig. 2, the saturable reactor 43 has its A.C. windings in series with a bridge rectifier 42 supplying the motor armature, and rectifier 37 supplies the field. Reactor control winding 47 is again energized by the resultant of the armature voltage and a voltage tapped off the field circuit by potentiometer 40, 41, winding 48 carries the armature current, and winding 46 carries a constant bias current. This winding is connected through a contact 50 which closes later than the other contacts so that at starting the saturation of the reactor is reduced and the starting current limited. In a further embodiment, Fig. 3 (not shown), two self-saturating reactors control a, bridge rectifier supplying the motor armature. Reference has been directed by the Comptroller to Specification 672,687.
Patent GB-1398307-A (GB)
Title: Drawing frames for the textile industry
IPC: D01H5/08
Filed: 1972-05-11
Abstract: 1398307 Gill bars WM R STEWART & SONS (MACKLEMAKERS) Ltd 10 Aug 1973 [11 May 1972] 22167/72 Heading D1N In a drawing frame, needled gill bars are rotated while entering and leaving a sliver by the axial movement of bar-supporting rods so that the needles are kept vertical to the sliver. As shown, Fig. 2, rod 6 of bi-lobal cross-section supports and is axially slidable through gill bar 3, and is supported in plates 8 of chain links 7 which abut the bar ends. The rod has a twisted portion and axial movement imparted to the advancing rod by cam track 11 causes the twisted rod portion and shaped hole 9 to co-act to rotate the rod and hence the bar. Alternatively, the twisted rod piston engages a shaped sleeve within the bar, and the rod is moved only axially to rotate the bar, or the bar is rotated by moving it along the rod. Adjacent bars 3, Fig. 4, have interlocking ribs and recesses 13, 14, which are spaced apart as the needles enter and leave the sliver to allow the bars to rotate.
Patent GB-1376012-A (GB)
Title: Key for a pin tumbler lock
IPC: E05B27/08
Filed: 1972-01-24
Abstract: 1376012 Keys KEYSTONE CONSOLIDATED INDUSTRIES Inc 24 Jan 1972 22352/74 Divided out of 1376011 Heading E2A The subject-matter of this Specification is identical to that in the parent Specification 1376011, but the claims are directed to the key which has a tubular body 83 with internal key-ways 84, 85, external bittings 88 at its outer end, and notches to receive blocking pins on its outer periphery.
Patent GB-722953-A (GB)
Title: Pronged variable distance fastener
IPC: F16B21/08
Filed: 1952-09-05
Abstract: 722,953. Stud and socket fasteners. FERNBERG, E. B., and FERNTOL PATENTS, Ltd. Sept. 3, 1953 [Sept. 5, 1952], No. 22427/52. Class 44. A fastener comprises a single strip of spring meta bent about transverse lines so as to have a closed nose 10, two limbs 11, 12 and a the ends of the limbs res pectively a pair of out wardly directed feet 13, 14 each limb being formed with a plurality of prong 16, 17 which are spaced longitudinally along its length and are directed outwardly and away from the nose. The fastener can be used for materials of any of a wide range of thicknesses, and as shown as used for securing a thick board 18 to a thin panel 19. The nose of the fastener is of reduced width and each limb is curved about a longitudinal axis so as to be internally concave. The prongs may be of any convenient shape and those on one limb may be staggered longitudinally as compared with those on the other. The feet 13, 14 may be concealed in a button which is either clenched over the feet directly or on to a washer threaded over the feet. Specification 521,287 is referred to.
Patent GB-726629-A (GB)
Title: Improvements in or relating to a container for a cigar or cigarette holder
IPC: A24F13/02
Filed: 1953-08-14
Abstract: 726,629. Cases for cigarette &c. holders. TROMBOTTS, V. F., and CAPRA, T. M. Aug. 14, 1953, No. 22501/53. Class 18. The cigarette or cigar holder 2 fits in a body 1 closed by a hood 3. The body and hood may have interengaging peripheral grooves and ridges 4. A fountain pen type clip 6 is provided on the hood.
Patent GB-1504323-A (GB)
Title: True index gear tooth space checking machines
IPC: G01B21/20
Filed: 1975-05-23
Abstract: 1504323 Testing gear teeth electrically ILLINOIS TOOL WORKS Inc 23 May 1975 [30 May 1974] 22538/75 Heading G1N [Also in Division G3] Apparatus for checking the dimensions of the teeth of a gear-wheel along a predetermined index radius comprises a stand 14, Fig.1, mounting a table 12 on which the gear-wheel is placed for rotation by a motor 42, which also drives an encoder disc 30 at a higher speed via disc 26, whereby angular displacement of the test gear-wheel is accurately measured and enables a probe 16, 20 or 100 to be synchronously inserted into the spaces between the teeth for monitoring the flanks during rotation. A manual switch is provided which is operated to select the appropriate probe to be used, i.e. probe 20 for a lead screw, probe 16 for an involute gear, or probe 100 for a gear-wheel, and prepares the energization circuit for a separate motor for each probe to produce linear vertical movement of probe 20, horizontal tangential movement of probe 16, or horizontal radial movement of probe 100. The instances of forward and backward movement of a probe is established by suitable division of the pulses obtained from the encoder 30, and controlled by counters. The selected probe is associated with a differential transformer for measuring the displacement of the probe tip, and the signals obtained are fed to a recorder driven synchronously with the table 12. For testing a gear-wheel, the position of probe 100 is initially adjusted manually by wheel 106 and locked in position by arm 130 and spring- loaded slide 102, Fig.4, for movement on guides 132, 134, Fig.6. A continuously running motor 142 is coupled through a clutch 156 and brake 158 to an eccentric 160 secured to an arm 164 whose length is adjustable by turn-buckle 165 to initially adjust the stroke length of the slide 102, the final stroke limits being determined by limit switches 176, 180, operated by actuator 172, 174, to ensure that the clutch 156 and brake 158 are selectively energized to enable 180 degrees rotation of eccentric 160 for measurement of each tooth of the gear-wheel. Thus the lateral displacement of the probe tip is measured by the differential transformer and recorded. A detailed description of the control circuitry is given.
Patent GB-379834-A (GB)
Title: Air-excluding device for mercurial barometers
IPC: G01L7/18
Filed: 1931-08-10
Abstract: 379,834. Barometers. BILHAM, E. G., Meteorological Office, Air Ministry, South Kensington, London. Aug. 10, 1931, No. 22540. [Class 106 (ii).] A mercury barometer is provided with a small capsule or thimble B which closes the dipping tube A except for a small aperture D to prevent entry of air into the tube in any position of the barometer. The annular aperture D is below the level of the mercury in the barometer cistern C in all positions of the barometer. In one form the thimble B is fixed to the cistern and in another form comprises a glass bulb fused to the mouth of the tube a small opening in this case being formed near the joint.
Patent GB-309360-A (GB)
Title: Improvements relating to back-sights for smallarms
IPC: F41G1/26
Filed: 1928-08-03
Abstract: 309,360. Frommer, R. von. Aug. 3, 1928. Sights.-Relates to backsights of the kind comprising a leaf 1 hinged at 2 and fitted with a slide 4 riding over an inclined or curved bearing surface 5 to adjust the sight in elevation, a spring maintaining contact between the slide and the bearing surface. According to the invention, the slide 4 is fitted with an adjustable set-screw 6, which rests against the bearing surface 5 and enables fine adjustments of elevation to be made.
Patent GB-700222-A (GB)
Title: A supercharging group for an internal combustion reciprocating engine, more particularly a diesel engine
IPC: F01D25/20
Filed: 1951-09-27
Abstract: 700,222. Gas turbine plant; centrifugal blowers. MASCHINENFABRIK AUGSBURGNURNBERG AKT.-GES. Sept. 27, 1951 [Nov. 11, 1950], No. 22605/51. Classes 110 (1) and 110 (3) [Also in Group XXXIV] An exhaust gas turbine driven supercharger for an internal combustion reciprocating engine has an air turbine arranged on the suction side of the compressor for driving a lubricating oil pump for the supercharger unit. The blower 2 is driven through the shaft 3 mounted in bearings 4, 5 by the turbine 1. In the radial suction bend 6 of the blower, turbine blades 7 are arranged. The air turbine drives an oil pump 11 which sucks lubricating oil from the sump 12 and forces it to the bearings 4, 5 from which it is returned to the sump. The bearings of the air turbine may also be supplied by the pump 11. Guide vanes 6a and 10 may be arranged before and after the turbine. The blades of the turbine may be formed or arranged so that the speed of the pump 11 is adapted to the speed of the supercharger. In a modification, the air turbine is arranged in an axial supply conduit to the blower.
Patent GB-144524-A (GB)
Title: Improvements in breast drills
IPC: B23B45/06
Filed: 1919-09-15
Abstract: 144,524. Le Sueur, P. J. Sept. 15, 1919. Hand and breast drills. -A breast drill carries a work-table and has automatic means for feeding the work-table to the drill. The feeding rod 5 is mounted to slide but not to rotate in bearings A and carries at one end a removable and adjustable work-table 6 and at the other end a ratchet feed nut 9 on a screwed portion 8. The feed nut is operated by a pawl 15 pivoted in a lever 10 which is oscillated about a pivot 11 by a snail cam 12 on the driving wheel spindle. The amount of feed is determined by the adjustment of a stop cam 19 for the lever, and further by the use of different ratchet feed nuts, and snail cams on the driving spindle. An extension piece 24 on the lever is adapted to be secured on either side to engage different cams on either side of the driving wheel.
Patent GB-261326-A (GB)
Title: Improvements relating to lens systems
IPC: G02B13/00
Filed: 1926-09-14
Abstract: 261,326. Rudolph, P. Sept. 14, 1926. Lenses. - Photographic and projection lenses corrected for spherical aberrations of the second order, for coma and astigmatism and corrected for all colour aberrations of the first order, consist of four or five single or cemented lenses, separated by air spaces, one of the outer lenses being collective and the lenses separated by air gaps being alternately collective and dispersive. The collective lens next the diaphragm has a focal length less than three times the focal length of the complete lens and his its concave surface turned towards the diaphragm. Numerical data of two examples are given in the Specification.
Patent GB-728727-A (GB)
Title: Improvements in or relating to machines for mixing concrete and other like materials
IPC: B01F11/00
Filed: 1953-08-18
Abstract: 728,727. Wheelbarrows. VARRAN, L. T. Aug. 18, 1953, No. 22715/53. Class 108 (1). [Also in Group II] A wheelbarrow consists of a container N which is in the form of a cylindrical pan having a stiffened lip L extending wholly around its top edge. The barrow forms a mixing container in a concrete mixing machine (see Group II), the lip L serving to locate the barrow in the frame of the mixing machine.
Patent GB-243480-A (GB)
Title: Improvements relating to screw mechanisms
IPC: B60H1/26
Filed: 1924-09-27
Abstract: 243,480. Lucas, Ltd., J., Lucas, O. and Egginton, W. H. Sept. 27, 1924. Valves and valve apparatus, actuating. - A quick-pitched screw, formed by twisting a rod of square or other suitable cross section, is provided with a nut comprising a pair of suitably spaced sheet-metal elements pressed apart by a spring in order to make the mechanism irreversible. The invention is shown applied to a ventilator c for the bonnet of a motor vehicle, which is adjusted through, an arm d by a knob b on the dashboard acting through a screw and nut connection a, e. The bent sheet-metal coupling member or shackle e. forms one nut member, the second element g being guided between the arms thereof, and a spring h is interposed. Lugs i limit the compression of the spring. A hinge j or a universal joint is interposed between the knob or handle b and the screw.
Patent GB-1256414-A (GB)
Title: Double beam photometers
IPC: G01J3/42
Filed: 1969-05-06
Abstract: 1,256,414. Double beam photo-meters. BODENSEEWERK PERKIN-ELMER & CO. G.m.b.H. May 6, 1969 [May 8, 1968], No. 23082/69. Heading G1A. In a double beam photo-meter including a radiation source S, a beam-splitting device 11 and a beam combining device 19, the beam-splitter directs radiation from the source along measuring and comparison ray paths, M and V respectively, in cyclic sequence, the device 19 being arranged such that in a first pair of adjacent quarter periods the total radiation (P + P 0 ) and the background radiation (P 0 ) from the measuring path M are received by a detector 23, while in a second pair of adjacent quarter periods corresponding quantities, (V + V 0 ) and V 0  are received from the comparison ray path V, there being a phasesensitive demodulator 24 for reversing the polarity of the detector during each period such that the output from the detector, which is fed to an optical null device 27, e.g. a comb-type attenuator, has a D.C. component proportional to (P-V). The beam-splitter comprises a disc 11 including transmitting and reflecting quadrants, 12 and 13 respectively, and two blackened quadrants 14, 15, and is rotated at the same speed as the combining device 19 which has reflecting and transmitting halves 20 and 21 respectively. During a first quarter period radiation passes through quadrant 12 and test sample PK to detector 23 via mirror 16 and sector 20, resulting in a measurement of (P+P 0 ) at the detector. In a second quarter period radiation is absorbed by quadrant 14; thus the detector measures P 0 . In a third quarter period, radiation is reflected from quadrant 13 and mirror 17 and passes through comparison cell VK and sector 19 to produce an indication of (V+V 0 ) at the detector. In a fourth quarter period radiation is absorbed by quadrant 15 and the detector measures V 0 . The detector output is accordingly a square waveform Fig. 2 (not shown) and by reversing this output polarity after the first and third quarter periods the demodulator eliminates the P 0  and V 0  components and produces an output whose D.C. component is proportional to (P-V) Fig. 3 (not shown). This output is fed to a servomotor 26 which adjusts the position of the null device 27, such as a comb-type shutter, to reduce the D.C. component to zero, the postion of the device 27 being indicative of the ratio P/V. In a further embodiment, quadrant 14 is reflecting and quadrant 15 transmitting. In this latter embodiment, the quadrant 14 may also be reflecting on its rear face so that when both P 0  and V 0  are being measured a housing area H appears as background. By displacement of the phase position of the demodulator control voltage by a eighth period in one direction, the demodulator output signal is proportional to (P+P 0 ) - (V+V 0 ) and the position of the null device gives an indication of (P+P 0 )/(V+V 0 ), while displacement by an eighth period in the opposite direction gives an output signal proportional to P 0 -V 0 , the null device position indicating P 0 /V 0 . A monochromator may be provided in the common beam path 22.
Patent GB-666816-A (GB)
Title: Improvements in and relating to tile making machines
IPC: B28B3/12
Filed: 1949-09-06
Abstract: 666,816. Moulding tiles. LEHMANN, B. A. Sept. 6, 1949, No. 23087/49. Class 87(ii) A tile making machine comprises a shaped roller adapted to compress material in a mould, means to synchronize the roller with relative movement between the mould and the roller to provide a rolling action on the material in the mould, and a recess in the roller to form a weathering strip on the tile. The roller may be in fixed bearings and the mould movable past it. In the embodiment of the invention which is described the mould 7 rests on a platform 5 on which is a pair of runners 8 and a rack 12. The roller 10 is carried in a frame 18 which has wheels 17 adapted to roll on the underside of the runners 8, whereby the roller is held down on the material in the mould, and wheels 21 on a fixed member 22 guide a runner 20 attached to the frame 18. Synchronism between the rotary movement of the roller 10 and its movement along the runners 8 is effected by a toothed wheel 14 carried on the roller shaft and meshing with the rack 12. The frame 18 is moved to and fro by an arm 26 coupled to a frame 27 which is pivoted on the base 2, this frame 27 being moved by a rod 29 pivoted to a pinion 30 so that this pinion acts as a crank, driven by a pinion on the drive shaft 32. A lever 44 operates a clutch mechanism 33 to put a driving pulley 36 into and out of engagement with the shaft 32. Exact synchronism between roller and mould is obtained by adjusting the rack 12 along the platform 5 by a screw 69, and correct height adjustment may be obtained by a guide 70. The roller is shaped to form the upper surface of the tile as it rolls the material in the mould, and has a flat portion 65 and surface 67 at right angles thereto which press on the material, when rolling commences, to form a weathering strip on the tile. To heat the roller it may be mounted on a hollow shaft 71 and, being itself hollow, may carry a series of annular electrically heated elements 72. The surface of the roller may be supplied with a film of oil. The under surface of the tile is shaped by a palate plate 50 which is positioned in the mould 7 by internal adjustable members 52. The mould is detachable from the machine.
Patent GB-626264-A (GB)
Title: Improvements in and relating to adjustable beds or couches
IPC: A47C17/44
Filed: 1947-08-21
Abstract: 626,264. Adjustable beds. TODD, R. A. P. Aug. 21, 1947, No. 23149. [Class 52 (ii)] A bed frame has supports 12, 13 at its foot to rest on the floor and is pivotally supported at its head on a frame 23, 24 which carries an extensible strut 26, preferably an hydraulic ram, by which the bed can be tilted to the vertical or any intermediate position, hooks 19, 20, or other means being provided for the attachment of securing means for the occupant.
Patent GB-406268-A (GB)
Title: Flexible strip material for use as corset stays and the like
IPC: B29C63/00
Filed: 1932-08-18
Abstract: 406,268. Corset stiffeners. WEEKS, W. R., 1, Rue Ambroise Thomas, Paris. Aug. 18, 1932, No. 23156. [Class 141.] Springy metallic strip material, as corset stiffeners, made of steel is covered on both sides with strips of resilient material such as paper or cloth having a width not greater than that of the strip and a coating of a plastic material, such as celluloid, is then applied so as to surround the whole. The strips of paper or cloth may be coloured, embossed, or otherwise decorated, and the plastic material is preferably transparent. Either the metal strip 1 or the narrower paper &c. bands 2 may be coated with adhesive and pressed together between rolls 3, after which the compound strip passes through a re-entrant tube 6 in a container 5, supplied with plastic composition under pressure, and is coated by passing through an extrusion orifice 7 which is wider at the ends than the middle to provide extra material at the edges of the strip to allow for shrinkage during drying. After drying on rolls 8, 9, the strips are cut to size and their ends sealed by dipping in celluloid solution.
Patent GB-517822-A (GB)
Title: Process for the production of pure hydrocarbons of the benzene series by distillation and apparatus for carrying out this process
IPC: C07C7/04
Filed: 1938-08-05
Abstract: 517,822. Distilling hydrocarbons of the benzene series. NEDERSCHLESISCHE BERGBAU AKT.-GES. Aug. 5, 1938, Nos. 23218 and 23219. Convention dates, Aug. 5, 1937, and Sept. 22, 1937. [Class 32] Pure hydrocarbons of the benzene series are produced from a mixture, containing constituents of higher and lower boiling point than the hydrocarbon, by distillation in at least two stages in one of which constitutients of lower boiling point are removed while in the succeeding stage the desired hydrocarbon is distilled off leaving the higher boiling constituents, a mixture being selected containing sufficient higher boiling constituents so that in the first stage the distillation residue can be raised to a temperature at least. 5‹C. higher than the boiling point of the pure hydrocarbon without causing substantial distillation thereof, e.g., in the case of benzene and toluene, the distillation residue is raised to at least 86‹C. and 115‹C. respectively. In the case of toluene the crude mixture is selected or adjusted so that crude toluene boils off to the extent of 95 per cent. between 100 and 130‹C. and the mixture contains 10 per cent. xylenes. The mixture is introduced through a line a into a column I divided at the point of introduction into an upper " rectifier " portion comprising 1/3 to ¢ and a lower "still" portion comprising ¢ to 2/3 of the height of the column. In this column the constituents of lower boiling point are distilled off and the residue is fed by pump P to column II where the pure hydrocarbon is distilled off from the residues which are removed through line R. If the mixture is not of the required proportions and contains an excess of low boiling constituents, the columns are provided with auxiliary columns A<2>, B<2>, Fig. 2, to which a portion of the distillate is removed for concentration of the desired hydrocarbon which may then be returned to the main columns A<1> and B<1>.
Patent GB-643704-A (GB)
Title: Method of, and machine for making block bottom bags
IPC: B31B50/78
Filed: 1948-09-03
Abstract: 643,704. Making paper bags. STRACHAN & HENSHAW, Ltd., and NICHOLSON, D. G. J. Sept. 3, 1948, No. 23272. [Class 94(ii)] In making block bottom bags a bag tube 31 is produced free from edge creases, and thereafter pressure is applied transversely to the tube to cause its upper wall to lift and thereby open the leading end of the tube sufficiently for it to engage a folding nose 22. The formation of edge creases is prevented by rounding the edges of the tube former-plate. The transverse pressure is applied by a member 28 resiliently mounted in one of a pair of forwarding rolls, said roll having an arcuate periphery adapted to engage the other roll 21 behind the member 28.