baber/WOPTO huggingface dataset:
Patent GB-252798-A (GB)
Title: Improvements relating to the radio transmission and reception of pictures
IPC: H04N1/00
Filed: 1925-03-06
Abstract: 252,798. Wright, G. M., and Smith, S. B. March 6, 1925. Copying-telegraphs.-Pictures &c. are transmitted wirelessly by progressively varying the frequency of a transmitted wave in accordance with variations in the light and shade values of elemental areas of the picture. Fig. 1 shows a transmitting arrangement. Light from successive areas of the picture is incident on a photoelectric cell P in circuit with an amplifier A, and the amplified current is applied between the grid and cathode of a frequency modulator valve F. The anode circuit of this valve is coupled at K to part of the oscillatory circuit of a master oscillators M, and potential variations between the grid and cathode of the valve F thus produce corresponding frequency variations in the oscillator M. Such variations are magnified in a transmitter T and radiated as a wave of varying frequency. Fig. 2 shows a receiving arrangement. The receiving aerial N is coupled to an amplifier A' adapted to limit the high frequency currents to the minimum intensity occurring during a fading period so that the output current has substantially the same amplitude for all frequencies. This current is applied through a transformer between the grid and cathode of a valve D of which the anode circuit includes an inductance L of low resistance and of an impedance which is small in relation to the anode-cathode impedance of the valve. The potential. differences across this inductance, which are substantially proportional to the incoming frequencies, are applied to a rectifying valve R, and the output current, after removal of high frequency components by a filter S, is applied to the reproduction of the picture, e.g. by supplying it to a very fine metal filament of a gas-filled lamp acting on a sensitized surface moving synchronously with the picture at the transmitting station.
Patent GB-1489923-A (GB)
Title: Frequency measuring arrangement
IPC: G01R23/00
Filed: 1974-02-12
Abstract: 1489923 Frequency measuring; Doppler radio navigation; active filters STANDARD TELEPHONES AND CABLES Ltd 4 Feb 1975 [12 Feb 1974] 6280/74 Headings H3A H4D and H3U A frequency measuring arrangement includes means for sampling an input signal waveform, means for deriving from the samples a pattern of sum and difference signals indicative of the relationship between the input signal frequency and the sampling frequency, means responsive to the signals to control a variable frequency generator in such a manner as to cause the input signal and sampling frequencies to be brought into a predetermined relationship with each other, and means for determining the generator frequency as an indication of the input signal frequency. In the embodiment of Fig. 17, each cycle of the input waveform is sampled four times by means of switches which are cyclically controlled # 1 -# 4  by the generator VCO, the switches being connected to capacitors C which are in turn connected to multipliers and an amplifier DI to derive cross products which control VCO. The switches and the capacitors together constitute a tuned filter or the equivalent of a variable delay line controlled by the VCO output. The capacitors are continuously discharged; they may, however, be periodically discharged (Fig. 16, not shown). A taper may be imparted to the input waveform prior to its application to the sampling switches (Figs. 14-15, not shown). The arrangement may be used for frequency tracking in a commutated aerial Doppler navigation system of the kind (LMS) described in Specification 1,234,541. Application to low angle tracking is mentioned. In an active filter, four FET switches driven by a four-phase clock samples the input signal and the sampled outputs over a scan period including a predetermined number of input cycles are summed up in separate capacitors (Fig. 9, not shown) or as in Fig. 17, the third and fourth FET switches are fed with the inverted input signal so that with the combination of outputs as shown only two capacitors are required. A band-pass filter type of response results if in the low-pass filter type of integrator, the capacitor is provided with a current leak. A band-stop filter is obtained by using high pass filters in place of the low-pass filters.
Patent GB-525685-A (GB)
Title: Combined folding table and container for a portable machine
IPC: A47B3/10
Filed: 1939-02-25
Abstract: 525,685. Cambined containers and tables. HOWE, H. Feb. 25, 1939, No. 6289. [Class 52 (iii)] A combined table and container for a portable typewriter comprises a base 1 to which folding legs are hinged, and which serves to support the typewriter in operative position, a cover 2 which serves to contain the typewriter in inoperative or carrying position and a sub-base 6 hinged to the base 1 to form a cover for the compartment containing the folded legs or a shelf as shown in Fig. 5. One leg is hinged on the hinge 9 of the sub-base 6 and is provided with a strut 12 pivoted ori the other hinge 8 and with a folding strut 11 as shown. The other two legs 20, 21 are pivoted at 18 to hinge leaves 19 of the hinges 22 and struts 25, 26 are also pivoted to the legs 20, 21 and to leaves 28 of hinges 29 so placed as to cause the legs to splay outwardly as they are unfolded. Additional folding struts connect the legs to a plate 38 on the base 1. Each leg comprises three portions, all of channel section pivoted to one another at 27, 42 so as to fold within one another and are held when folded in position by latches 43, 51 which, when released, permit the leg portions to spring out partially, the latches 43, 51 serving also when the legs are extended to engage parts 52, 53 to lock the legs in extended positions. The portion 41 is provided with a foot 50.
Patent GB-144777-A (GB)
Title: Improvements in or relating to pressure-operated electrical cut-outs
IPC: H01H35/34
Filed: 1919-03-13
Abstract: 144,777. Frost & Co., H., and Welch, W. H. March 13, 1919. Thermostats. - In a pressureoperated electric cut-out, a diaphragm or other pressure - operated member B is controlled by a bow spring D which is thrust towards the diaphragm by separately - adjustable screws D<1>, D<2>. The screw D<2> may be provided with an index arm D<4> which extends through a slot G in the casing and co-operates with a scale G<2>. The diaphragm is held in place by a cover-plate C, which is hollowed on the lower side and serves to clamp the diaphragm to the pressure chamber A and to support the spring D. A thrust-piece B<1>, extending through a hole in the cover-plate, is interposed between the diaphragm and the bow spring. A second thrust-piece D<3> on the upper face of the bow-spring bears against a resilient contact-arm E and moves this away from a fixed contact E<1> to cut out a heating or other circuit when the pressure in the chamber A exceeds a predetermined limit. The invention is particularly applicable for regulating the temperature in a portable vulcanizer by repetitive cutting-off of the current whenever a predetermined pressure is reached in the steam generator. As an additional safeguard against overheating, the contact-arm E may be bimetallic, so that it bends away from the co-operating contact when heated beyond a certain limit.
Patent GB-395446-A (GB)
Title: Improved machine for sharpening razor blades
IPC: B24B3/48
Filed: 1932-03-02
Abstract: 395,446. Sharpening razor blades. WLOKA, M., 10, Friedenstrasse, Solingen, Germany. March 2, 1932, No. 6370. Convention date, Jan. 29. [Class 60.] A machine for sharpening razor blades consists of an endless conveyer band upon which the blades are mounted and bv which they arc carried past four honing discs whereby all four faces of the two cutting edges are treated, the blades being placed on the band by a pneumatic device movable by cams. The machine comprises a conveyer band a supported by pulleys c, d on a bed b, the band having thereon pins to engage the holes in the blades, and having therein holes engaged by pins in the pulley c, whereby the band is driven. The blades are treated by the flat faces of four honing discs k . . k<3> mounted upon longitudinally inclined and transversely angularly adjustable axes, the discs k, k<1> serving to hone the upper faces of the edges, and the discs k<2>, k<3> to hone the lower faces. The blades are stored on rods in a magazine r and are removed singly therefrom by a suction member o movable in a curved guide slot q by a cam disc s and a lever u. The member o is lowered and raised by levers w, w<1>, actuated by cams s<1> on the disc s and by springs, when over the magazine and over the band, respectively to remove a blade from the magazine and to deposit it on the band, the suction being interrupted temporarily when discharging the blade by a valve operated by a cam s<2>. After the blades have been honed, they may fall from the band into a hopper, or may be removed from the band by a suction device or by tongs.
Patent GB-267516-A (GB)
Title: Improvements in flexible abrasive articles such as sandpaper and the like, and in methods of making the same
Filed: 1927-03-08
Abstract: 267,516. Minnesota Mining & Manufacturing Co., (Assignees of Carlton, R. P.). March 13, 1926, [Convention date]. Emery and sand cloth and paper or a similar composite structure consists of a backing of paper or cloth to which the abrasive grit is secured by means of an adhesive comprising a synthetic resin. The resin is applied to the base whilst in a viscous condition, and the grit is applied either to the coating of resin or is mixed therewith before its application to the backing. For fine grits, the resin may be thinned by addition of alcohol and benzene, and the flexibility of the sheet may be varied by the addition of glycerol, starch, dextrine, sugar, or castor oil and shellac, &c. The coated sheet is heated to 150‹ F. to 175‹ F. to harden the resin, the resulting product being waterproof. The sheet may be coated either on the back or on the operative face, or on both, with the adhesive to render the backing waterproof and to secure a stronger bond between the grit and the backing. The resin employed may be prepared from phenol and formaldehyde and a catalytic agent. The flexibility of the sheet may be controlled by variation of the duration of heating. The Specification as open to inspection under Sect. 91 (3) (a) describes also the employment of a commercial resin with a solvent consisting of alcohol and benzene. This subject-matter does not appear in the Specification as accepted.
Patent GB-137430-A (GB)
Title: Improved sharpener for knives and the like
IPC: B24D15/08
Filed: 1919-03-15
Abstract: 137,430. Turton, W. March 15, 1919. V-slot and like bladc sharpeners.-In a V-slot sharpener for knives &c., the slot is formed between the opposed peripheries of pair and single disks c, d mounted in the forked end h<2> of a handle h, the single disk d being adapted for rotation only and the disk c being mounted on an axle slidable in slots e<2> and resiliently urged towards the disk d by a coiled spring f acting on an intervening piece g; the advance of the disk c is limited by the ends of the slots. In a modification, the disks are mounted in a bracket adapted to be secured to a table &c. According to the Provisional Specification, the power of the spring may be adjusted by means of a rotatable handle; the single disk may also be resiliently pressed, and a guide may be provided for positioning the knife.
Patent GB-674666-A (GB)
Title: Improvements in hurricane lamps
IPC: F21V17/18
Filed: 1950-03-16
Abstract: 674,666. Hurricane lamps. SOC. INDUSTRIELLE DE FERBLANTERIE. March 16, 1950 [March 21, 1949], No. 6610/50. Classes 75(ii) and 75(iv) A hurricane lamp has a suspension handle which when tilted towards one side of the lamp is freely movable throughout the whole of its tilting movement, and which is freely movable on a part only of its tilting movement towards the opposite side, where it co-operates with and actuates on the last part of said tilting movement, mechanical means for raising a movable chimney of the lamp: Figs. 9 and 10 show the movable chimney 13 in the raised position, of each side member of the handle 1 in its downward movement about its pivot pin 2 having engaged an abutment 7 on a lever 8 also pivoted on the pin 2 and actuating a pivoted linkage comprising the lever 8 and a lever 10 pivoted to the cap 12 of the chimney 13. Toward the end of its downward movement a flattened part of the handle 1 is forced outwardly by a cam 16 into engagement with a notch in a part 6b integral with the lever 8, so that the reverse movement of the handle 1 rotates the lever 8 to release the toggle action of the levers 8 10 whereby the chimney 13 is lowered by a spring (not shown). The upper edge of the glass chimney is provided with a bead 19, Fig. 5, interrupted at two or more places 20 forming notches with which co-operate in a bayonet connection a corresponding number of nipples 21 provided on the lower end of the chimney 13.
Patent GB-577386-A (GB)
Title: Improvements relating to the wrapping of pipes, cables and other elongated bodies with flexible strips or tapes
IPC: B65H81/06
Filed: 1944-04-11
Abstract: 577,386. Wrapping adhesive tape or strip about cables, pipes, &c. KEMP, J. V. L. April 11, 1944, Nos. 6663 and 9281. [Class 73] [Also in Groups XXV and XXVIII] Tape or strip material is wrapped above cables, pipes or other elongated bodies without 'rotating the bodies by causing the bodies 15 to move relatively to a curved track 4 in contact with the track upon which rests the strip material 11. The tape or strip may bear adhesive on one face, and is placed upon the track with the adhesive outwards. The body to be wrapped is applied to the tape near its forward end in the direction in which the body is moved around the track. The track may be of convex form with an outer retaining member 5 having a concave surface conforming to the surface of the track. A pivoted spring-actuated knife 9 is mounted upon a member 8 having a part projecting into the path of the bodies so as to be rocked by the bodies to sever the tape at a distance from its forward end corresponding to the length of tape to be applied. A latch may be provided for holding the knife raised until the tape is to be severed.
Patent GB-140113-A (GB)
Title: Improvements in the framework of aircraft and the like
IPC: B64C3/18
Filed: 1918-04-20
Abstract: 140,113. Page, F. H. April 20, 1918. Framework.-Tension wires are attached to aircraft struts, spars, &c. by means of a tubular bushing passing through the strut &c. at its neutral axis and having its walls perforated to receive the tension wires. Fig. 1 shows bracing-wires 4, 5 fitted with tensioning-devices 11 which pass through the walls of the tubular bush 3 on the spar 1. Plates 9 of ply wood, metal, &c., strengthened by ribs 6, may be applied on each side of the spar. The central wire 4 passes through a hole 12 in the spar. The bushing 3 contains segmental stiffening-elements 13 threaded to receive the tensioning-devices 11.
Patent GB-1029624-A (GB)
Title: Delayed action on-off valve for controlling the flow of pressurised fluid
IPC: F15B13/00
Filed: 1963-02-19
Abstract: 1,029,624. Valves. W. D. LUDWIG. Feb.19, 1963 [Feb. 5, 1962], No. 6694/63. Heading F2V. Apparatus for controlling the flow of pressurized fluid comprises a body with ports 15, 16 connected by a passageway 11, 12, a valve 23 engaged by means 24 for normally maintaining the valve in the closed position, a chamber 26 in the body having a piston 50 for opening the valve, and fluid metering means 73 for admitting fluid to the chamber to operate the piston 50 after a predetermined time delay. The piston 50 and the valve 23 are slidably mounted on a tube 18 containing a passage 60a leading to the chamber 26 from the metering means 73 which consists of a V-shaped slot having its effective length controlled by a member 74 on a spring- loaded cap 78 in screw-threaded engagement with the tube. The slot 73 is connected by a passage 65 to a valve 72 and filter 69 while a similar valve 49 is provided in a duct 41 connecting the chamber 26 with a vent 46. When fluid enters the port 15 and the passage 11, it displaces the valve 72 to the left to open the passage 65 and flows at a rate determined by the setting of the cap 78 into the chamber 26. When the pressure in the latter has reached a predetermined value the piston 50 lifts the valve 23 from its seat against the resistance of a spring 24. In its lowermost position the piston rests on projections 32, 33 which are uncovered as soon as upward movement has begun to increase the differential area of the piston in a 2: 1 ratio and give a snap action. Reverse flow through the apparatus closes valve 72 and permits fluid in chamber 26 to escape by opening the valve 49. The piston 50 then falls to its lowermost position and the valve 23 is held open by the flow through passages 12, 11.
Patent GB-860435-A (GB)
Title: Improved method of repairing railway tracks and an installation for carrying out the
IPC: E01B27/11
Filed: 1957-02-28
Abstract: 860,435. Relaying railway track. SCHEUCHZER, A., and SCHEUCHZER, A. Feb. 28, 1957 [March 3, 1956]:, No. 6722/57. Class 104 (2). A method for at least partially clearing away ballast from a railway track characterized in that mechanical apparatus for excavating and conveying is carried by a vehicle which runs on a track from which on the forward movement of the vehicle and in the direction of movement the sleepers are removed, the two rails of the track being maintained, at least under the vehicle, at their normal spacing by suitable means. The sleepers are initially removed and spacing-bars 21 with guide-rail securing means are put in their place. The spacing bars are removed in the excavating space. A machine removes the ballast by a number of excavators 3 to 6 independently pivoted at 7 to a vehicle 1 in the form of an arch and the ballast is fed to a transverse conveyer 9 on to a conveyer 10 and to a screening conveyer 13, on a vehicle 11 from which recovered ballast is passed by conveyers 18, 19 to a ballast spreader 20 having outlets 21, and the fine ballast is conveyed by conveyers 14, 16 to a conveyer 17 for discharge on to a vehicle 15. Replacement sleepers 23 are supplied from a vehicle with a crane 26 to a roller platform 22 and trolleys on overhead tracks which traverse the arch and deposit the sleepers in the required position.
Patent GB-639657-A (GB)
Title: Improvements in modulation detectors
IPC: H03D1/16
Filed: 1947-03-11
Abstract: 639,657. Valve circuits. SPERRY GYROSCOPE CO., Inc. March 11, 1947, No. 6723. Convention date, Feb. 1, 1943. [Classes 40 (v) and 40 (vi)] A voltage representative of the envelope of a carrier wave whose amplitude A is modulated is obtained by deriving two quadrature components of the wave A sin wt and A cos wt, squaring each component in circuits comprising a rectifier and a square law discharge tube and adding the outputs to produce A<2> sin<2> wt+ A<2> cos<2 >wt=A<2>. Undistorted modulation may then be produced by using a circuit having a square root characteristic. From the modulated wave applied to terminals 11, 12 a second wave having a quadrature phase relation at carrier frequency is derived by a phase shift network 15, 16. The two waves are applied through full wave rectifiers 36, 37 to the control grids of valves 19, 20 operating on a square law part of their characteristics, the rectifiers being provided so that the square function is obtained on both positive and negative half-cycles. The outputs from the valves are combined in common anode load resistor 54 and applied to the control grid of a further valve 55 producing in its anode circuit a voltage proportional to the square root of the input voltage. The inputs to valves 19 and 20 are equalized by connecting the grid of valve 19 to a tap on rectifier load resistor 46. The required 90 degree phase difference in the input waves may also be obtained if the input transformer 41 is connected across resistor 15 (Fig. 4, not shown).
Patent GB-1526174-A (GB)
Title: Sliding-vane rotary compressor
IPC: F01C21/08
Filed: 1977-02-17
Abstract: 1526174 Rotary positive-displacement-fluidmachines STAL REFRIGERATION AB 17 Feb 1977 [26 Feb 1976] 06770/77 Heading F1F In a sliding-vane compressor having radial recesses 13 in the ends of the rotor 5 and outlet ports 9 disposed in the housing end-walls 2, 3 so as to cooperate with the said recesses, a piston 14 is lodged in each recess and attached to the diametrically opposite vane so that gas that would otherwise remain in the recesses at the end of the compression phase of the working cycle is swept into the outlet ports. The pistons may be either united with the vanes, as shown, or connected to the vanes by rods, Figs. 3 and 4 (not shown). The outlets ports may taper in the direction of rotor rotation, as shown.
Patent GB-829674-A (GB)
Title: Book cover material
IPC: D06N3/10
Filed: 1958-03-03
Abstract: 829,674. Coated fibrous materials. DU PONT DE NEMOURS & CO., E. I. March 3, 1958 [March 21, 1957], No. 6806/58. Class 140. Sheet material suitable for use as a bookbinding material comprises a flexible fibrous substrate having on one side thereof a base coat comprising a vinyl chloride polymer and a copolymer of 113-butadiene and acrylonitrile, and a top coat comprising a vinyl chloride polymer, a drying oil modified alkyd resin and an aliphatic monohydric alcohol modified ureaformaldehyde resin. The base coat may comprise 85 to 15% of vinyl chloride polymer and 15 to 85% of butadiene-acrylonitrile copolymer, and the top coat may comprise 80 50% of vinyl chloride polymer, 15 to 30% of the modified alkyd resin, and 5 to 20% of the modified urea-formaldehyde resin, all proportions being by weight. The substrate which may be paper, or a tightly or loosely woven or non-woven, such as felted fabrics of natural or synthetic fibres, may be sized on the uncoated side with for example a polyvinyl acetate size as described in U.S.A. Specification 2,650,170. The expression "vinyl chloride polymer " means a polyvinyl chloride, or a copolymer of vinyl chloride and another ethylenically unsaturated monomer such as vinyl acetate, vinylidene chloride, vinyl fluoride, a C 1  to C 4  alkyl fumarate, and acrylic acid, the vinyl chloride constituting at least 50% of the copolymer. The butadiene-acrylonitrile copolymer may be that described in U.S.A. Specification 1,973,000. The aliphatic monohydric alcohol, e.g. butanol, modified ureaformaldehyde resins are described in Specification 483,399. Drying oil modified alkyd resin specified are derived from pentaerythritol, glycol, diethylene glycol and glycerine, with phthalic, terephthalic, adipic, succinic, and sebacic acids modified with linseed, chinawood or soya oils. Thickening agents, e.g. salts of polyacrylic resin, sodium carboxymethyl cellulose, starch or animal glue, fillers, e.g. china clay, calcium carbonate, titanium dioxide, pigments, stabilizers, e.g. dipropylene glycol dibenzoate, and the like may also be present.
Patent GB-686501-A (GB)
Title: A device for turning the pages of music
IPC: B42D9/08
Filed: 1951-03-13
Abstract: 686.501. Leaf turners. GRAVES. R. March 13,1951, No. 6852/50. Class 52(iii) Each page of e.g. music carries an arm 10 clipped thereto and extending from the spine to project beyond the pages, the extension being provided with a pressed up bridge part 12 which spaces the pages and which is contacted by the end 15a of a lever 15 pivoted at 14 when a foot pedal 17 is operated. The end 15a is pivoted to the lever 15 so that, during the return movement of the lever, the end 15a rides over the next topmost bridge 12. The pedal 17 acts on the lever 15 either through a link 16 or through compressed air: A knee pedal may replace the foot pedal if e.g. the music is being used with an organ.