baber/WOPTO huggingface dataset:
Patent GB-287532-A (GB)
Title: Improvements in or relating to thermionic amplifiers, frequency changers and the like
IPC: H03B19/10
Filed: 1928-03-22
Abstract: 287,532. Marconi's Wireless Telegraph Co., Ltd., (Assignees of Hansell, C. W.). March 23, 1927, [Convention date]. Thermionic amplifiers.- In a thermionic frequencychanging amplifier the output circuit is tuned to an harmonic of the input fre. quency, and one or more condensers are provided either for neutralizing interelectrode capacity or for over-neutralizing and so introducing regeneration. As shown in Fig. 6, the input is applied to the grids of two amplifiers T1, T2 arranged in phase opposition, the plates being so connected to the circuit Cp, Lp that the output currents are combined additively. In this arrangement even harmonics are combined in phase whilst odd harmonics are eliminated by phase opposition. By connecting the plates to the circuit Cp, Lp so that the high-tension supply flows through the two halves of the coil Lp in parallel, odd harmonics are preserved and even harmonics disappear. The input coil Lg is tuned by the series condensers Cg<1>, Cg<2> whilst the output circuit is tuned to a selected harmonic by means of the condenser Cp. Regeneration can be introduced by adjusting the neutralizing condenser CN beyond the point of balance. A series of such amplifiers may be arranged in cascade in order to secure a progressive change in frequency from stage to stage. This permits a low-frequency piezo crystal of convenient dimensions to be inserted in one of the earlier stages for the purpose of maintaining the final output frequency at a constant value.
Patent GB-767913-A (GB)
Title: Improvements in and relating to optical apparatus
IPC: G02B23/18
Filed: 1955-03-25
Abstract: 767,913. Binoculars; photographic cameras. MOLLER OPTISCHE WERKE GES., J. D. March 25, 1955 [March 26, 1954], No. 8829/55. Classes 97(1) and 98(1) In a combined binocular telescope and photographic-camera the axis of the camera objective and the axes of the two shafts about which the telescope halfparts rotate form the corner points of an isosceles triangle the height of which amounts to at least 0.7 of the base, the half-parts being positively connected such that rotation in one direction of one halfpart brings about a similar rotation in the opposite direction of the other half-part. As shown in Fig. 1 the telescope halfparts 15, 16 are each carried by bars 4 and 5 separately pivoted to a central casing 1 the bars 4 being connected to bottom pivot bushes 17, 18, carrying interchanging toothed segments 21, 22 to ensure simultaneous rotation of the telescopes. The camera shutter 11 and film rods 12, 13 are carried within the casing 1 which supports the camera objective 8, Fig. 3, above the plane containing the axes of the pivot bushes 17, 18, a mirror 10 being provided to direct the image-forming beam vertically on to the horizontal film. Some of the camera controls extend through the hollow bushes 17, 18, for example the film-winder. 7.
Patent GB-543704-A (GB)
Title: Improvements in or relating to low-power dynamo-electric machines
IPC: H02K21/14
Filed: 1940-05-17
Abstract: 543,704. Dynamo-electric machines. PHILIPS LAMPS, Ltd. (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). May 17, 1940, No. 8837. [A Specification was laid open to inspection under Sect. 91 of the Acts, Nov. 20, 1940.] [Class 35] A low-power dynamoelectric machine such as a bicycle dynamo comprises a coil 1, Fig. 1, surrounded by a magnetically-conductive cage formed from a number of U-shaped sheetiron pieces embracing the coil, one limb of each piece forming poles of alternate polarity 5, 6, 7 and the other limbs 8, 9, 10, forming part of the cage wall joining adjacent poles. An additional ring 11 completes the cage wall ; this ring may be dispensed with if the limbs 8, 9, 10 are provided by overlapping extensions. A doublewalled coil cage may be constructed by first assembling a single-walled cage from pieces 21, 22, Fig. 3, having the limbs forming the poles displaced laterally with respect to the other limbs but in opposite directions, and then assembling a second layer with pieces 22 at the bottom and 21 at the top; the joints in the first layer are covered at top, bottom and outer side by the second layer. The poles may be outside the coil circumference. For coils of small radius the pieces may be shaped to a circular arc.
Patent GB-829858-A (GB)
Title: Lid for piano keyboard
Inventor: WATTS BERNARD WILLIAM HERBERT
IPC: G10C3/02
Filed: 1958-03-19
Abstract: 829,858. Pianofortes. MONINGTON & WESTON Ltd. March 19, 1958. No. 8859/68. Class 88 (2). A keyboard cover 1, which may be of bent plywood, is hinged by means of a bracket 4 at each end engaging a corresponding pin 10 attached to the keyboard structure.
Patent GB-642904-A (GB)
Title: A machine for hollow grinding scissors, razors, boning and similar knives
IPC: B24B19/00
Filed: 1948-03-30
Abstract: 642,904. Hollow-grinding. LAYCOCK, E. G., LAYCOCK, C., LAYCOCK, D., and LAYCOCK, F. March 30, 1948, No. 8896/47. [Class 60] A machine for hollow-grinding scissors, razors, boning and similar knives having a cup-shaped grinding wheel 12 with an externally-coned, operative, face is provided with means for presenting the work 25 to the wheel and traversing it longitudinally in its own plane and always in the same direction while it is in contact with the wheel. The work is mounted on a holder 19 pivoted at 20, 21 on a slide 18 displaceable along an inclined face on a frame 16 adapted to slide in a trough 11. The inclined face is parallel with the operative face of the wheel and the inclination of the holder with respect to its slide may be varied by a pivoted screw adjustment 22. The slide 18 is connected by links 27, 28 with a shaft 29 provided with two cams 30, 32 and connected through a lost-motion device comprising a pin 34 and a fork 33 with a hand-lever 31. The two cams alternately actuate levers 40, 41 adapted to bear on opposite ends of a cam member 39 freely mounted on a shaft 34a which fixedly carries a complementary cam member 45. The shaft 34a is provided with a hand-wheel 46 and is in screw-threaded engagement with the trough 11. A spring mounted on this shaft is constrained at one end by a flange 37 and at the other by the frame 16. Rotation of the hand-wheel advances the frame 16 to compensate for wheel wear. In operation, the lever 31 is moved towards the grinding wheel to cause the cam 32 to separate the cam members 39, 45 which advance the frame 16 towards the grinding wheel against the load imposed by the spring. The work is now in contact with the grinding wheel and the lever 31 is moved back until the pin 34 rotates the shaft 29 to cause the slide 18 to ascend the inclined face of the frame 16. When the work has been completely traversed across the wheel, the cam 32 releases the lever 41 while the cam 30 actuates the lever 40 to restore the cam members and the frame 16 to their original positions, the slide 18 gravitating to an adjustable stop. To impart "set" to the work, the holder 19 is provided with an arm 48 slidably secured to a roller 49 which is free to slide and rotate in a cylindrical guide 50 adjustably clamped to the frame 16. The guide 50 is inclined to the workholder so that the latter turns on its pivots during the grinding operation. The workholder may be fitted with a work support 24 which is adapted for angular adjustment in its own plane.
Patent GB-1091777-A (GB)
Title: Radio transmitter provided with a device for preventing anode breakdown of the transmitter power output valve
IPC: H03C1/20
Filed: 1965-03-02
Abstract: 1,091,777. Radio transmitting apparatus. DANFOSS A.S. March 2, 1965 [March 3, 1964], No. 8974/65. Heading H4L. A transmitter is provided with a protective device for the power output valve, consisting of a junctionless, non-rectifying solid-state switching device connected across the input to the modulator which changes from a highresistance to a low-resistance condition when the input signal voltage exceeds a threshold value and reverts to its original condition when the current flowing through it falls below a predetermined value.
Patent GB-680478-A (GB)
Title: Improvements in and relating to shaft bearings
IPC: F16C35/02
Filed: 1950-04-13
Abstract: 680,478. Lubricating bearings. BRITISH THOMSON-HOUSTON CO., Ltd. April 13, 1950 [April 19, 1949], No. 9131/50. Classes 12 (i) and 12 (iii). A bearing for rotatably supporting a shaft 3, comprises a sleeve 11 having two diametrically opposite lubricant feeding openings 16 in which lubricant absorbent material 18 is disposed for feeding lubricant to the journal surface, oppositely cut spiral grooves 23, 24 being provided in the journal surface for feeding the lubricant toward the ends of the bearing. Annular grooves 21, 22 communicate with the outer ends of the grooves 23, 24 respectively. Rings of lubricant absorbent material 19, 20 are disposed in a reservoir 15, and feed lubricant to the wicks 18. End thrust washers 29, 34 and oil throwing members 31, 36 are provided. A plurality of closely spaced spiral grooves 44, 45, Fig. 3, may be provided, or two opposed sets of grooves of the type shown in Specification 658,405 may be utilized.
Patent GB-670031-A (GB)
Title: Improvements in electrical calculating apparatus
IPC: G06F7/40
Filed: 1949-04-04
Abstract: 670,031. Digital electric calculating-apparatus. ROULSTON, A. E. April 4, 1949 [April 14, 1948], No. 9133/49. Class 106 (i). Column-shifting means for a binary machine consists of a chain of relays a the contacts of which are so wired between a plurality of input lines b representing binary denominations and a plurality of output lines c, that a binary number represented by potentials applied to the input lines b will be reproduced on the output lines c always with the highest significant digit on the same output line. In an example shown by heavy lines in the Figure, the highest digit in the binary representation of an amount 42, which is 32 or 2<SP>5</SP>, causes energization of relay 321, whereby contacts are changed over and the amount is represented by potentials on the output lines A, C and E.
Patent GB-141686-A (GB)
Title: An improved track wheel
IPC: B60B17/00
Filed: 1920-03-29
Abstract: 141,686. Tait, J. St. G. Reynolds-, Rowe, J. J., and Hobday, J. B. April 14, 1919, [Convention date]. Wheels with rail flange rotatable relatively to tread.-In railway wheels of the type having a flange separate from and rotatable relatively to the tread, the flange is stepped so as to overlap the tread. In one construction, the flange 1 is riveted to a disk 6 mounted freely on the axle and held laterally by thrust bearings 8, 9 and a shoulder 12. The flange has a series of stepped recesses 10, 10<a>, 10<b> adapted in turn to overlap the tread 3. The series of recesses allows reforming of the wheel after the parts have been worn by turning down the tread to fit the successive recesses and reforming the flange. The necessary axial adjustment is obtained by transferring the distance-pieces 11 in succession from the position shown to a position between the bearing 8 and the shoulder 12. In another construction, the flange 1 consists of a ring mounted in a recess in the wheel and held by a ring 14. The flange and the parts associated with it may be in sections bolted together.
Patent GB-1030823-A (GB)
Title: Improvements in or relating to tele-communications exchange systems
IPC: H04M3/36
Filed: 1965-03-04
Abstract: 1,030,823. Automatic exchange systems. SIEMENS & HALSKE A.G. March 4, 1965 [March 4, 1964], No. 9187/65. Heading H4K. Groups of subscriber's lines TG1 ... TG3 are connected directly to non-numerical switching groups TKG1 ... TKG3 while incoming trunks VL are connected to the same groups by way of an auxiliary switching stage MK under the control of a unit VM which measures the traffic in the several groups and causes the incoming calls to be directed to the groups that are most lightly-loaded. If all the groups TKG1 ... TKG3 are fully loaded, incoming calls may be directed to further switching groups KGX.
Patent GB-899112-A (GB)
Title: Detecting and automatic gain controlling circuit arrangement using transistors
IPC: H03D1/18
Filed: 1960-03-16
Abstract: 899,112. Transistor automatic gain control circuits. KABUSHIKI KAISHA HITACHI SEISAKUSHO. March 16, 1960 [Nov. 24, 1959], No. 9234/60. Class 40(6). A detector and A.G.C. circuit comprises a gain control transistor 12 and an earthed base detector transistor 17. A first resistor 23 is connected from the emitter of control transistor 12 to earth, at least part of the potential developed across it being used to bias the base of detector 18, a second resistor 25 is connected from the collector of the detector to a D.C. supply source 26, at least part of the potential developed across it being used to provide an A.G.C. voltage which is fed back to the base of the control transistor 12, and a third resistor 24 is connected in the emitter circuit of detector 17 to provide a detected output signal. Amplitude modulated input signals from source Ei are fed through the control transistor 12, and the amplifier 16 to the transistor 17, the emitter-base diode of which detects the signal to provide an audiofrequency output across resistor 24. An amplified A.G.C. voltage is derived from the collector of the detector, and the variation in emitter current of transistor 12 resulting from this voltage being fed back to its base, is used to bias the transistor 17 towards an optimum working point.
Patent GB-322711-A (GB)
Title: Improvements relating to oil retaining apparatus for ships' stern-tubes and the like
IPC: B63H23/36
Filed: 1929-03-22
Abstract: 322,711. Ferguson, L., Ferguson, P., and Ferguson, R. March 22, 1929. Drawings to Specification. Stuffing-boxes, substitutes for.-The construction is the same as that described in Specification 322,710, but the channelled rings 1 are not divided into segments.
Patent GB-1354845-A (GB)
Title: Control or regulating equipment for an electric motor
IPC: D06F34/08
Filed: 1972-02-29
Abstract: 1354845 Control of A.C. motors HOLZER PATENT AG 29 Feb 1972 [2 March 1971] 9300/72 Heading H2J [Also in Division G3] An electric motor 2, which may be the drive motor of a washing machine or the pump motor of a dish-washing machine, is connected in series with a power consuming device 1 such as a heating resistor of the machine and in parallel with a controlled electronic switch 3 such as a Triac. The switch is controlled by a firing circuit 5 responsive to a motor speed signal provided by a tacho-alternator 8 or by the back EMF of the motor and to the signal provided by a programme controller 7. The motor speed may thus be maintained at a desired value, which may be changed by the controller 7 in accordance with the signal provided by a level switch or thermostat 4 or directly by the latter signal if it is supplied to the firing circuit 5, Fig. 1b (not shown). The motor receives D.C. in one or other direction to produce corresponding directions of rotation, the A.C. supply from the mains 6 being controlled by the switch 3 so that the latter passes complete half cycles of one polarity and partial half cycles of the other polarity, Figs. 1c and 1d (not shown). A programme unit (not shown) controls a further switch 17 controlling the members 1, 2, 3. The motor may have a series field, further terminals being provided to allow the connection of winding. Fig. 2 (not shown), this embodiment and subsequent others obtaining reversal of the motor by mechanical contacts controlled by the member 7. The subsequent other embodiments describe (1) the replacement of Triac 3 by an anti-parallel connected diode and thyristor, Fig. 3 (not shown); (2) the use of a flywheel diode connected to the mechanical reversing contacts, Fig. 4 (not shown); (3) the use of a bridge of rectifiers with the motor across one diagonal and the Triac across the other, Fig. 5 (not shown), or with the motor and a thyristor across the same (output) diagonal, Fig. 6 (not shown) or with a thyristor and the resistor 1 across this output diagonal, the motor being in parallel with the thyristor, Fig. 7 (not shown); (4) the use of an anti-parallel connected diode and thyristor with additional contacts to enable the motor to be operated when the heating resistor 1 is operated at reduced power, Fig. 8 (not shown).
Patent GB-672644-A (GB)
Title: Improvements in or relating to the manufacture of magnetic recording media
IPC: G11B5/64
Filed: 1948-04-02
Abstract: 672,644. Electrodeposition. BRUSH DEVELOPMENT CO. April 2, 1948 [April 2, 1947], No. 9342/48.. Class 41. [Also in Group XXXVIII] Apparatus for electrolytically coating a wire 51 to form a coating which can be permanently magnetized, comprises a pair of rollers 94, 96, the roller 94 serving as a cathode, and the curved periphery of each of which contains at least a hundred grooves for receiving the wire 51. The wire 51 passes through a container 92 for the electrolyte in a series of loops, and an auxiliary cathode 140 is mounted within the container adjacent the roller 96 which is made anodic with respect to the cathode 140 and formed of stainless steel..The wire 51 is passed through a cleaning tank 71, including a cleaning electrode 77, and through a rinse 80 before being plated and through a second rinse 81 subsequent to plating. The anodic material, e.g. cobalt and nickel, is contained in three cages 110, 111, and 112 within the container 92. Between the anode cages and cathode roller 94 an alternating current may be superimposed on the direct current. The electrolyte may comprise an acid solution of at least one salt of nickel, cobalt or mixtures of cobalt and nickel, containing between 15 and 250 grams of metal per litre of solution.
Patent GB-826336-A (GB)
Title: Improved thermal insulation material and methods of making the same
IPC: C08J9/14
Filed: 1958-03-25
Abstract: The invention comprises foamed polyurethane thermal insulation material made substantially without evolution of carbon dioxide by reacting a first resin component containing reactive hydrogen groups other than carboxyl groups under anhydrous conditions with a second component comprising an organic di- or higher isocyanate, the foaming being effected by vaporization of a saturated aliphatic fluorinated hydrocarbon and the polyurethane being enclosed in a bag impervious to air and moisture.  The reaction may be effected in two stages, with the fluorinated hydrocarbon present only in the second stage. Suitable fluorinated hydrocarbons are trichloromonofluoromethane, dichlorodifluoromethane, trichlorotrifluoroethane, dichloromonofluoromethane, monochloromonofluoroethane, difluoromonochloroethane and trifluorodichloroethane.  The bag can be made of polyethylene, a copolymer of vinyl chloride and vinylidene chloride or a mixture of a vinyl chloridevinyl acetate copolymer and a butadiene-acrylonitrile copolymer.ALSO:The invention comprises foamed polyurethane thermal insulation material made substantially without evolution of carbon dioxide by reacting a first resin component containing reactive hydrogen groups other than carboxyl groups under anhydrous conditions with a second component comprising an organic di- or higher isocyanate, the foaming being effected by vaporization of a saturated fluorinated hydrocarbon and the polyurethane being enclosed in a bag impervious to air and moisture. The reaction may be effected in two stages, with the fluorinated hydrocarbon present only in the second stage.  Suitable fluorinated hydrocarbons are trichloromonofluoromethane, dichlorodifluoromethane, trichlorotrifluoroethane, dichloromonofluoromethane, monochloromonofluoroethane, difluoromonochloroethane and trifluorodichloroethane.  The bag can be made of polyethylene, a copolymer of vinyl chloride and vinylidene chloride or a mixture of a vinyl chloride-vinyl acetate copolymer and a butadiene-acrylonitrile copolymer.
Patent GB-616695-A (GB)
Title: Improvements in and relating to gas turbine power plants
IPC: F02C7/27
Filed: 1945-04-17
Abstract: 616,695. Gas turbines. BRITISH THOMSON-HOUSTON CO., Ltd. April 17, 1945, No. 9633. Convention date, April 21, 1944. [Class 110 (iii)] In a power plant comprising a gas turbine 15, a compressor 1 driven by the turbine, and one or more combustion chambers 8 which are supplied with air by the compressor, combustion gas from an auxiliary combustion chamber is supplied to a starting nozzle or nozzles 18 for starting the plant. The auxiliary combustion chamber 17 is fed with air or oxygen under pressure from a flask 20 which is detachably connected thereto at 19, and with fuel from a tank 22, the mixture being ignited by a sparking-plug 26. The ring of nozzles 13 is used for normal running. The compressor 1 is of the centrifugal type. Specification 590,422 is referred to. The Specification as open to inspection under Sect. 91 also comprises the statement that the plant may be started by compressed air. oxygen, steam or other suitable gas supplied by the flask 20 without the use of fuel. This subject-matter does not appear in the Specification as accepted.
Patent GB-762696-A (GB)
Title: Improvements in artificial legs
Inventor: WAGGOTT JOHN BERRY
IPC: A61F2/64
Filed: 1954-04-01
Abstract: 762,696. Artificial legs. VOKES ERNST SCIENTIFIC SURGICAL APPLIANCES, Ltd. June 30, 1955 [April 1, 1954], No. 9641/54. Class 81(2) Resistance to flexure of a knee joint, over a predetermined angle, is provided by a dashpot having an axially movable plunger operated by cam means on relative movement of the thigh and shin. In the form described the thigh portion of the leg 1 carries the dashpot 4, in which a piston 5 moves when actuated by a cam 3, secured to the knee pivot 2. The piston is pressed downwards during the angle of movement where resistance is required and oil is then transferred through duct 13 from below the piston to above. The piston freely follows the cam, on its upward movement, owing to the provision of a spring 11 and a non-return valve 7, which allows oil to pass through ducts 6.
Patent GB-347427-A (GB)
Title: System for the flexible assembling of members, such as pieces of wood, particularly applicable to the building of a motor car body
IPC: B62D29/02
Filed: 1930-03-26
Abstract: 347,427. Strut and tie-rod connections. DASTE, M. J., 12, Rue Pierre Lhomme, Courbevoie, Seine, France. March 26, 1930, No. 9699. Convention date, Feb. 12. [Class 20 (ii).] Resilient connections between the frame members of a vehicle body comprise a fitting constituted by a pair of separate metal elements secured to opposite faces of one frame member and a fitting constituted by a single metal element secured to one face of the other frame member, one fitting being provided with a housing to carry a compressed rubber or like sleeve for the reception of a spindle passing through the other fitting. As shown, the transverse members e, f and cantrails o, p are provided with T-shaped metal plates g<1>, g<2> r<1>, r<2>, s<1>, s<2> forming holders for pins or spindles j which pass through sockets k having rubber &c. bushings, and formed integral with metal plates l secured to the uprights and arches a, b, c and wheel arches d.