baber/WOPTO huggingface dataset:
Patent GB-491844-A (GB)
Title: Improvements in or relating to moving contact electric current converters
IPC: H02M1/20
Filed: 1937-02-06
Abstract: 491,844. Converting. SIEMENSSCHUCKERTWERKE AKT.-GES. Feb. 6, 1937, No. 3630. Convention date, Feb. 21, 1936. [Class 38 (ii)] In a commutator switching arrangement commutation is improved by means of a transformer the primary being connected in series with the switching contacts and means being provided for varying the inductance of the primary by varying resistance in the secondary circuit synchronously with the movement of the switching contacts. In the form shown in the Figure the primary windings of a transformer 7 are in series with the contacts of a commutator switch 1 and the secondary windings are connected to a transformer 11 in the supply circuit of an auxiliary rectifier 8. By this means the inductance in the circuit of the main commutator switch 1 is periodically varied, the inductance being increased at the moment of commutation. The rectifier 8 is supplied through a phase shifting transformer 10 which is linked with the adjusting means for the commutator switch 1 so that for any variation in the moment of break at the commutator switch a corresponding adjustment of the commutating means takes place. in a modification of this the rectifier 8 may be grid controlled and the moment of ignition varied in dependence on the adjustment of the commutator switch. An additional correction dependent on the load current in the main circuit may also be provided. The load 12 may comprise a constant torque motor. Instead of a mechanical adjustment of the stator of the commutator switch 1 the motor 15 may be provided with a split field. In a further modification, the anodes of a grid controlled rectifier 18 are connected directly to the secondary of the transformer 7, the cathode being connected to the star point so that when an anode becomes conductive the associated secondary winding is short circuited. Reference has been directed by the Comptroller to French Specification 530,463.
Patent GB-311001-A (GB)
Title: Improvements in or relating to hypodermic syringes
IPC: A61M5/24
Filed: 1928-02-06
Abstract: 311,001. Everett, S. J. Feb. 6. 1928. Syringes. - The needle g of an ampoule syringe is held in use between a pair of plate-like members such as e which are formed with longitudinal grooves to receive the needle itself and with recesses to accommodate a bead h formed on the needle. One of the members e is pivoted at e<2> to a lug b<1> on the syringe casing a and is formed with an arcuate groove e<5> to receive the bead h when the part is closed on the needle. The parts e are secured together by bent lugs f, f<1>. The construction permits securing of the needle in the syringe without contamination of any part contacting with the injection fluid or the patient. The syringe body a comprises a semi-cylindrical portion of sheet metal into which the ampoule is inserted laterally and secured by a turn-button l. The lower end of the body a is formed with flanges b to which is secured a member c formed of sheet metal folded on itself to form hand grips c<1> and a tubular guide for a plunger d. In a modified construction the movable member e is pivoted about lateral hinges on the flanges b<1>, the members being secured together by a pivoted catch on the movable member or by a sleeve slidable on the hinge body to encircle the members. According to further modifications the needle holding members are of semicircular section and are pivoted about a hinge parallel with the syringe axis. The two members may be secured together by a slidable sleeve or the syringe body may be formed of two semicylindrical parts hinged together and secured by a catch, the needle holding members in this case being formed integral with the body parts. The Provisional Specification describes a construction in which the syringe body comprises an open rectangular frame and states that the movableneedle-holding member may be made slidable in. grooves on the hinge body.
Patent GB-943531-A (GB)
Title: Roof support for use in mines
Inventor: MAXWELL-HOLROYD LESLIE
IPC: E21D11/18
Filed: 1959-02-04
Abstract: 943,531. Mine roof supports. B.R.D. CO. Ltd. Feb. 3, 1960 [Feb. 4, 1959], No. 3874/59. Heading E1E. A yielding mine roof supporting arch comprises two arch sections 10 which are telescopically secured together by a coupling 13 and an hydraulic jack 15 and are each detachably mounted on an hydraulic prop 23 having a releasable clasp 24 and a guide member 25. Each member 15, 21 incorporates one-way valve means permitting a transfer of fluid between the piston and cylinder units thereof whilst each member 21 also incorporates a pressure-relief valve, see Figs. 2, 3 and 4 (not shown). In a modification, Fig. 6 (not shown), the hydraulic jack leaks to atmosphere to permit contraction thereof.
Patent GB-1415259-A (GB)
Title: Location of faults in a pcm system
IPC: H04B17/40
Filed: 1973-01-25
Abstract: 1415259 Testing repeaters TELEFON AKTIEBOLAGET L M ERICSSON 25 Jan 1973 [27 Jan 1972] 3952/73 Heading H4L A p.c.m. station A tests repeaters Ra, Ri, Rn on an outgoing link I UT  by sending a test signal U 1  and tests those on an incoming link I IN  by sending a special signal U 2  to an adjacent station B which converts it into an appropriate test signal and returns this on line I IN . Only alternate stations need then provide test facilities. Each repeater contains a band pass filter Fa &c., which has a respective pass frequency, which receives the outputs of all the i.f. amplifiers in outpgoing and incoming links (two of each are shown I UT , II UT , I IN , II IN ), and which feeds a common service line S. The test signal sent by A consists of trios of pulses in each of which the middle pulse is of opposite polarity to the other two. Those trios occurring during positive half cycles of the band pass frequency of whichever repeater on the outgoing line I UT  is to be tested are completely inverted with respect to those occurring during the negative half cycles; this imparts a pass-frequency component to the pulse train formed of successive trios, so that only the appropriate filter will respond. A faulty repeater is identified by its failing to produce a b.p. filter output to the service line S. For testing the incoming lines, the station B has two converters DT B , one for each line, which produce the appropriate pulse trios in response to a corresponding special signal containing pairs of opposite polarity pulses from station A. Two convertors DT B  are also provided for the adjacent station in the opposite direction (not shown). The pulse duos in opposite half cycles of a selected test frequency are inverted, so as to secure the appropriate inversion of the pulse trios to which they are converted at DT B . The pulse duos, in contrast with the tios, have a zero D.C. net level and therefor contain no frequency component to which the filters in the outgoing link can respond. Circuits performing conversions between duos and trios of pulses are described (Figs. 2, 3, 4, not shown) and use push-pull input and output stages connected by arrangements of logic gates and shift registers.
Patent GB-100248-A (GB)
Title: Improvements in Internal Combustion Engines.
Inventor: GILE FRED HENRY
IPC: F02B1/00
Filed: 1916-03-18
Abstract: 100,248. Gile, F. H. April 5, 1915, [Convention date]. Valves; valve-gear.-In a two-strokecycle engine having one piston working in another, the exhaust ports are controlled each by a pair of beat valves 27, 33 one of which is automatic to prevent the escape of the charge through the exhaust port and the other mechanicallyactuated by a tappet 35 carried by a shaft 36 oscillated by a cam-actuated rod 38. The transfer passages 4, 4' between the pump spaces and the combustion chambers may be controlled by a ring valve (not shown) which may be held to its seat by a spring.
Patent GB-770012-A (GB)
Title: Improvements in moulded top pieces or the like for shoes and boots
IPC: A43C13/02
Filed: 1954-02-11
Abstract: 770,012. Boot &c. protectors. FUSSELL, E. G. and CHAMPION, C. B. July 15, 1954 [Feb. 11, 1954], No. 4083/54. Divided out of 768,676. Addition to 705,471. Class 17 (3). The metal reinforcement for the moulded top piece of the parent Specification is modified in that the treading portion is in the form of two arcuate ribs 3, 4, which may be perforated. The plate 1 of the reinforcement is provided with apertures 2 some of which may be between the ribs 3, 4.
Patent GB-910936-A (GB)
Title: Composite material
Inventor: BAUER STEFAN GEORGE
IPC: F17C13/00
Filed: 1960-02-04
Abstract: 910,936. Laminates. ROLLS-ROYCE Ltd. Jan. 30, 1961 [Feb. 4, 1960], No. 4089/60. Class 140. [Also in Group XXVIII] In a tank for storing liquid oxygen or other gases having an outer shell 10, Fig. 1, and an inner shell 11, a lining for the inner shell comprises one or a number of layers of a foil of a ductile metal, preferably lead, bonded on each side to plastics layers, preferably of polyethylene terephthalate. The shell 11 is surrounded by a layer 12 of insulating material, preferably foamed polystyrene the cells of which contain a vapour or gas, such as CO 2  or watervapour, which condenses to give a very low vapour pressure at the temperature of the tank contents. In a modification, a metal inner shell 35, Fig. 8, has an insulating jacket comprising a single or double layer of sections 36, each of which comprises a light-alloy trough 37 fitted with. foamed polystyrene 38 and closed by a lead foil/plastics laminate 39 the edges of which are turned over with those of the trough as at 40.
Patent GB-463008-A (GB)
Title: Improvements in means for absorbing vibration in aircraft
IPC: B64D45/00
Filed: 1936-02-11
Abstract: 463,008. Resilient mountings. SHORT BROS. (ROCHESTER & BEDFORD, Ltd.), and ROBINSON, G. I. Feb. 11, 1936, No. 4117. [Class 108 (iii)] [Also in Group XXXIII] A vibration-damping mounting for use in aircraft comprises two fittings e<1>, e<2> mounted respectively, on spindles e<3>, e<4> connected by side plates. The fittings e<1>, e<2> are formed with flat faces e<11>, e<12> and may be guided relatively to each other by a projection e<20> which engages a slot e<21>. The fittings e<1>, e<2> are provided with a central web and inner and outer flanges e<15>, e<14>. Radial vanes e<16> are connected between the flanges e<15>, e<14> and co-operate with flanges e<19> carried by the side plates to compress rubber blocks e<18> placed in the spaces between the vanes.
Patent GB-581933-A (GB)
Title: Improvements in or relating to model railways
IPC: A63H19/30
Filed: 1944-03-06
Abstract: 581,933. Model railways. PINDER, T. March 6, 1944, No. 4123. [Class 132 (iii)] A model railway is built up of sections supporting or associated with further sections supporting control rods or wires whereby control movements or impulses can be transmitted along the track. In Fig. 1 a pair of rods 8 are carried in a casing 9 below the track, an enlargement at the centre of each rod being acted on by a pair of return springs 10. Adjacent sections of track are joined by spring clips 5 and sockets 6, Fig. 2, and the ends of the rods 8 are such as to transmit movement to the rods in adjacent sections. The sections may be extended laterally to support rods 8 in guides 9a, returned to normal position by leaf springs 11. Alternatively the support for the control rods may be separate from the track (Fig. 3, not shown). The rods may be used for transmitting electric control currents, suitable insulation being provided. The support for the track may be of cloth, papier mÔchÚ or other flexible material and may comprise studs or other fastenings for electric wires used for control purposes or for providing a good connection to the conducting rails. The surround of a flexible track is resilient and the casing of the control rod is secured to the track only at its ends. Fig. 6 shows how movement of a rod 8 is transmitted through a lever 21 to a cam slide 24 and through a weighted lever 31 to a signal arm. The movement of the lever 21 or 24 may open or close an electric circuit to another track section. Movements at an angle to the rod 8 may be effected through a bell-crank.
Patent GB-401647-A (GB)
Title: Improvements in or relating to couplings
IPC: F16D3/76
Filed: 1932-02-12
Abstract: 401,647. Universal joints. BUDD WHEEL CO., 2500, Hunting Park Avenue, Philadelphia, U.S.A.-(Assignees of Rosenberg, R. H. ; 2500, Hunting Park Avenue, Philadelphia, U.S.A.) Feb. 12, 1932, No. 4244. Void [Abridged as open to inspection under Sect. 91 of the Acts, Feb. 13, 1932]. [Class 80 (ii).] In a flexible shaft - coupling wherein an elongated rubber sleeve 14 effects a frictional driving bond between an outer member 12 and a longitudinally - curved inner one 13, the inner element is formed of a sheet metal sleeve 13 spun or stamped, and arc-welded at both ends 17 to a metal sleeve 16 splined on one of the shafts 11. The space 21 between the sleeves 13, 16 serves as a reservoir for lubricant introduced through a fitting 19 and holes 20, 18 to lubricate the splines. The sleeve 16 has a sealing cap 22.
Patent GB-662063-A (GB)
Title: Improvements in an earth cutting tooth
IPC: E02F3/76
Filed: 1949-02-16
Abstract: 662,063. Excavating earth. OAKLEY, J. L. D. (Harnischfeger Corporation). Feb. 16, 1949. No. 4257/49. Class 68 (i). [Also in Group I] An earth cutting tooth comprises a frustoconical shank 5 and a shovel portion 7 which slopes downwards from the axis 19 of the shank and is formed in the vicinity of the shank as a nose portion 6 of triangular configuration for deflecting earth away from the shankreceiving socket 3 in the arm 2 of the machine 1. A strengthening web 8 extends from the shovel portion 7 to the rear end of the shank. In the leading portion of the shovel is formed a trough 10 having embedded therein, by a matrix 14, hard wear-resisting inserts 13 which are protected from impact by the lip 12 of the shovel portion. The inserts 13 may be replaced by small fragmentary pieces of hard material mixed in the matrix.
Patent GB-1141756-A (GB)
Title: Process and apparatus for production of ammonium carbonate solution
Inventor: MAVROVIC IVO
IPC: C01C1/26
Filed: 1967-01-27
Abstract: 1,141,756. Ammonium carbonate, carbamate. CHEMICAL CONSTRUCTION CORP. 27 Jan., 1967, No. 4293/67. Heading C1A. In the production of ammonium carbonate or carbamate by reacting NH 3  with CO 2  in the presence of an aqueous solution of ammonium carbonate, the gases from the rection zone are first scrubbed with cooled (NH 4 ) 2 CO 3  solution recycled from the reaction zone, then the gases from the scrubber have added to them a further amount of CO 2  and this gas mixture is scrubbed with water in a bubble-cap-tower to remove all traces of NH 3  from the final residual gases. The figure shows a unitary apparatus suitable for the process, at the bottom of vessel 1 is ammonium carbonate solution 2, and to this solution there is added liquid ammonia via line 11 and sparged into via line 10 is gaseous CO 2 , e.g. flue gases. Product (NH 4 ) 2 CO 3  solution is withdrawn from line 13 and a second stream drawn from line 12 is cooled in heat exchanger 15 and returned to vessel 1 above packing 3, which may be a particulate solid or consist of a plurality of sieve trays where the gases from reaction zone are scrubbed as they ascend the tower. As the gases leave the packing there is added to them a further amount of gaseous CO 2  via line 20 and the mixture ascends the bubble cap tower and is scrubbed with water from line 21 in trays 5. This water may be cooled by coils 7. The exhaust gas leaving by line 22 is completely free of NH 3 . Preferably the temperature of the initial reaction is in the range 15‹ C. to 120‹ C. and the pressure from 15 psia to 200 psia. Heat exchanger 15 cools the liquid stream to a temperature at least 10‹ C. below its initial temperature and the final scrubbing cools the residual gas to a temp. below 100‹ C.
Patent GB-306692-A (GB)
Title: Improvements relating to acoustical devices, such as loud-speakers
IPC: H04R9/04
Filed: 1928-02-11
Abstract: 306,692. Selway, E. D. Feb. 11. 1928. Loud-speakers: diaphragms; magnetic instruments.-The coil-driven conical diaphragm of an acoustic device, such as a loud-speaker, is supported at its apex and/or periphery by two or more triple-hinged links which serve to centre the coil in the magnetic air-gap but do not furnish any restoring force. When the links are employed at the apex only, the base of the diaphragm may be supported by a ring of thin sheet rubber, kid, oiled silk, &c., whilst if the links are provided at the periphery only, the diaphragm may be centred and supported at its apex by radial strings &c. In the constructions shown, links are provided both at the periphery and apex of the diaphragm. Fig. 1 shows a loudspeaker in which the pot-magnet b is carried by a support c on a baseboard a which is rigidly secured to a front board d. A conical diaphragm f of paper, thin bristol board, &c. is mounted opposite a circular aperture in the board d and carries a coil l located in the magnetic air-gap j. The coil former k is formed with a circular flange m which is connected by a series of hinged links p, p<1>, p<11> to a ring n attached by legs o to the board d. Each link, Figs. 5 and 7, consists of a pair of hinges, the leaves of which are hinged together at three fulcra. In the construction, Fig. 5, each one of the pair of hinges consists of four folding leaves of light metal, celluloid, &c. the two outer leaves being rigidly fixed flat against the adjacent faces of the flange m and ring n respectively, the leaves being pivoted together in the manner of an ordinary metal hinge. In the modification, Fig. 7, the ring and flange constitute the outer leaves, the leaves proper being formed of thin bristol board &c. and secured together and to the ring and flange by strips' of kid, woven silk fabric, &c. A flat flange q having a polygonal outer edge is secured to the periphery of the diaphragm f and is' connected to the front board d by a series of links r similar in construction to that shown in Figs. 5 or 7. In the modified construction, Fig. 3, the links p are disposed between and hinged to a solid back s of the coil former and a flat cross-shaped member t supported on a rod u screwed to the central magnet pole.
Patent GB-344625-A (GB)
Title: Improvements relating to tubular metallic golf shafts and their manufacture
IPC: A63B53/14
Filed: 1930-02-10
Abstract: 344,625. Golf clubs. ACCLES & POLLOCK, Ltd. and HACKETT, W. W., Paddock Works, Round's Green, Oldbury, near Birmingham. Feb. 10, 1930, No. 4371. [Class 132 (ii).] A tubular, metallic, golf-club shaft comprises a tapering or uniform handle a terminating in an integral tapered extremity a<1>, and a uniform or tapering shank b secured at its end within or without the extremity of the handle, the interengaged parts of the tubes being secured by a soldering, brazing, welding, pegging or other operation. The shank b may be of the slightly concave, tapering construction described in Specification 332,486, [Class 132 (ii), Games]. Reference has been directed by the Comptroller to Specification 106,277, [Class 132 (ii), Games].
Patent GB-588480-A (GB)
Title: Improvements relating to boring and other machines
IPC: B23Q5/52
Filed: 1945-02-21
Abstract: 588,480. Drilling-machines. LUCAS, Ltd., J., and SWIFT, W. Feb. 21, 1945, No. 4380. [Class 83 (iii)] The feed of the tool in a drilling &c. machine is arranged to be arrested axially and moved radially to perform such an operation as cutting a circular groove in a bore, independently of the motion of the headstock. The hollow driving- spindle c contains a tool:spindle e, the exterior of the tool receiving end f being eccentric and carried in an eccentrically bored housing g. The housing is secured to the driving-spindle and connects the drive to the tool-spindle by radial keys h engaging grooves in the toolspindle so formed that relative axial movement of the spindles causes the tool-spindle to move eccentrically to the driving-spindle. A sleeve i is slidably mounted over the driving-spindle and connects with a peripheral groove in the tool-spindle by locating-screws k extending through slots in the driving-spindle, and is moved against spring pressure at n by bellcrank lever r riding over a ramp s on the bed of the machine. Applied to a multi-spindle machine, a number of operations may be performed on a work-piece simultaneously.
Patent GB-1135353-A (GB)
Title: A method and apparatus for hot drawing conical tubes and bars
IPC: B21H7/00
Filed: 1967-01-30
Abstract: 1,135,353. Drawing. DALMINE S.p.A. 30 Jan., 1967 [31 Jan., 1966], No. 4397/67. Heading B3P. A bar or tube is drawn to a conical form by pulling a hot cylindrical workpiece between two or more grooved rolls which cooperate to form a circular die of variable diameter, the rolls being rotated as the pulling proceeds and being quickly reversed at the end of the pulling stroke. The workpiece is returned through the rolls to a desired position for starting a second stroke, and the operation is repeated over progressively increasing lengths of the workpiece. The rolls are disposed in a housing 3 and are driven during a pulling stroke by a motor 18 through gear-boxes 17 and 15 and clutches 16 and 14, return of the rolls to a starting position being effected by an hydraulic mechanism 19. A tube 6 is pulled by a chain-driven carriage 4, limit switches controlling the stroke of the carriage. A furnace 1 serves to heat the tube initially. The mechanism 19, Fig. 2, includes an upper wheel which is connected to the rolls and linked by a chain 20 to a lower wheel 21 carried by a piston 22. During a pulling stroke the clutch 16 is engaged and the rolls driven by the motor 18 the upper wheel rotating in direction C to raise the wheel 21 and piston 22. At the end of the stroke the clutch 16 is automatically disengaged and the piston 22 is hydraulically forced downwardly to quickly rotate the upper wheel in direction D. A piston 25 connected to the chains 20, moves within a fixed cylinder 26 to act as a shock absorber, the piston being forced downwardly, in opposition to the piston 22, to set the final position of the upper wheel. The angular positions of the rolls before the next stroke is adjustable by relatively rotating shafts 12 and 13 after disconnecting clutch 14. The rolls, Fig. 4, are each formed with a groove having a radius which decreases from a maximum value to a minimum and is held at the minimum value for a short distance. The teeth on one side of each roll are offset by half a pitch from the teeth on the opposite side.