baber/WOPTO huggingface dataset:
Patent GB-109234-A (GB)
Title: Improvements in Screw-cutting Taps.
Inventor: SMITH JOHN EDWIN
IPC: B23G5/06
Filed: 1917-05-21
Abstract: 109,234. Smith, J. E. May 21, 1917. Taps.-Fig. 1 shows a chip-clearing tap in which the leading threads are overhung so that the metal cuttings fall clear. Figs. 3 and 4 show a tap in which the bottoms 2a of the flutes slope forwards to clear the cuttings.
Patent GB-492105-A (GB)
Title: Improvements in and relating to electric motor control
IPC: H02P25/12
Filed: 1937-03-12
Abstract: 492,105. Brush-gear for dynamo-electric machines. BRITISH THOMSON-HOUSTON CO., Ltd., and ADKINS, B. March 12, 1937, No. 7329. [Class 35] Gear for moving the two sets of brushes of a frequency changer exciter for the slip-regulator of an induction motor comprises a rotatable disc or plate coupled to one of the rings and carrying pins engaging a slot in a member connected to the other brush ring whereby the ring that moves through the smaller distance moves faster at each end of its travel relative to the other ring. In the form shown in Fig. 1 the motion of the arm 24 is communicated to rocker 22 by lever 13 secured to a disc 17 having slots receiving pins 6, 7 projection from a disc 16 connected to the arm 24 by a member 18, the discs 16, 17 being pivoted at 31, 32 respectively. In a modification, the pivots of discs 16, 17 are on the arm 24, the disc 16 also having an additional pin connected to a fixed point by a link. In the form shown in Fig. 4 the movement of an arm 24 is transmitted through link 100 to a disc 28 carrying pins 26, 27 engaging slots in the brush rocker 22. In a further modification, the rocker 22 is driven through a slotted pivoted quadrant co-operating with pins carried by a disc driven by the spindle of rocker 21. In each modification the rocker 22 is moved slowly at first from its central position and afterwards more rapidly. The movement of the rocker 21 is proportional to that of lever 24. Specification 424,005 is referred to,
Patent GB-363566-A (GB)
Title: Improvements in and relating to spinning machines for artificial silk
IPC: D01H1/10
Filed: 1931-03-10
Abstract: <PICT:0363566/IV/1> In the application to bobbin machines of the arrangement described in the parent Specification, wherein a waste roller i is mounted on a carriage h traversable along a machine for spinning artificial silk so that it may be disposed adjacent any spinning point to receive the filament when the receiving element is being changed, the waste roller is provided with a driving gear m adapted to engage with one of a series of gears o on a shaft extending lengthwise of the machine, there being a gear o adjacent to each winding bobbin d.
Patent GB-107963-A (GB)
Title: Improvements in Apparatus for Lubricating Internal Combustion Engines.
IPC: F01M11/06
Filed: 1917-05-22
Abstract: 107,963. Soc. Lorraine des Anciens Etablissements de Dietrich et Cie de Luneville. June 30, 1916, [Convention date]. Liquid level, maintaining.-In a device for maintaining a constant level of oil in the crank chamber of an internal-combustion engine for aviation and other purposes, comprising an hermetically sealed reservoir A connected to the crank chamber by oil and air pipes C, D, the lower end of the air pipe D terminates in a box F supported in the crank chamber, with which it communicates by small holes G, H at its lower and upper ends. By this means disturbance of the lubrication by inclination of the engine is minimized. The oil pipe C is fitted with a cock J.
Patent GB-259463-A (GB)
Title: Improvements in fire lighting devices
IPC: F24B15/00
Filed: 1926-03-17
Abstract: 259,463. Stieler, H. March 17, 1926. Lighting fires. - Apparatus for fires comprises a casing for the reception of a solid block fire-lighter, and to which compressed air, oxygen, or a mixture of the two is supplied in order to consume the smoke. The form shown in Fig. 1 comprises an open-topped box with airducts 5, 6 terminating in down-turned slot-shaped nozzles 7, air being supplied from a pipe 4 and impinging on the upper surface of the fire-lighter block 2. Air outlets may be provided at other points, for example the bottom of the box may be in the form of a grate. Fig. 3 shows a form comprising a cylindrical combustion chamber 12 surrounded by an annular air-space 13, from the inwardly-curved forward end 17 of which the air enters the chamber 12. Additional air-holes 19, which may be adjustable, may be formed in the rear wall of the inner casing. The flame outlet may be formed by a conical removable mouthpiece 20, over which is a second cone 22 with an intervening air-gap 21. Cooling-ribs 16 may be provided on the outer casing. In the form shown in Fig. 4 the block fire-lighter 25 is supported on a counterbalanced pivoted grate 24 in the chamber 23, at the rear end of which is a pivoted damper 27, retained in the closed position by a catch 28 on the counterbalance arm 29 of the grate, and also by a pivoted member 26 which is forced back by the lighter. Air is supplied through a pipe 23, which may be connected by a cylindrical or ball joint 34. The air passes through openings 36 into an outer casing 37, and thence between annular nozzles 39, 40. Openings 41 may be provided through which air enters the front of the combustion chamber. When the firelighter is consumed the pivoted grate rises and releases the damper 27, air being then supplied through the apparatus to complete the ignition of the fuel. The outer casing 37 forms a roof protecting the combustion chamber from coal thrown on the fire.
Patent GB-420267-A (GB)
Title: Improvements in or relating to valve mechanism for high speed compressors
IPC: F04B39/10
Filed: 1934-03-08
Abstract: 420,267. Valves. SEBIA SOC. D'- EXPLOITATION DE BREVETS POUR L'INDUSTRIE L'AVIATION ET L'AUTOMOBILE, 20, Rue La Rochefoucauld, Paris. March 8, 1934, No. 7433. Convention date, March 8, 1933. [Class 135] In a valve assembly for use in high-speed compressors a stop 1 of substantial thickness is used to facilitate the dissipation of heat. The stop is made preferably by stamp. ing or casting under pressure an alloy of bronze and aluminium A yielding false seat 3 made of strong material such as hardened steel and having preferably circular openings is interposed between a lamella 6 in contact with the stop and the seat 13 of the valve assembly. A sheet of lead 5 acts as jointing material. A form of false seat 3 for use with low-pressure apparatus is grooved at 10, Fig. 5, for the reception of projections 11 on the modified form of stop shown in Fig. 4.
Patent GB-580569-A (GB)
Title: Improvements in aerial systems
IPC: H01Q13/24
Filed: 1944-04-21
Abstract: 580,569. Aerials. STANDARD TELEPHONES & CABLES, Ltd., and WILLOUGHBY, E. O. April 21, 1944, No. 7482. [Class 40 (v)] To reduce the size of an aerial used in free space and to reduce its drag when used on aircraft, the aerial is enclosed in a sphere or hemisphere of dielectric material, depending upon whether the aerial is balanced or unbalanced. The radius of the dielectric surrounding the aerial may have any value, but is preferably equal to an integral number of half wavelengths as this increases the aerial input impedance, whereas a radius equal to an odd number of quarter wavelengths reduces the input impedance. If the dielectric is arranged to have a radius equal to an integral number of quarter wavelengths so that the difference between the radius and the length of one arm of the resonant aerial is an odd number of quarter wavelengths, some of the input reactance of the aerial is balanced out and wide band operation is obtained. The balanced aerial arrangement, Fig. 2 (not shown), comprises rod, cylindrical, conical or other shaped elements located in a sphere of dielectric material such as that known under the Registered Trade Mark " Faradex " which has a dielectric constant similar to that of water, so that the size of the resonant aerial is reduced, and the operational characteristics are substantially unaffected by the presence of water or ice. If a balanced line is used to feed the aerial at the centre of the sphere, its characteristic impedance must be adjusted to match the line outside the sphere, taking into account the presence of the dielectric, while if an unbalanced line is employed, the quarter wave stub for suppressing standing waves may be located inside the dielectric sphere. In the modified arrangement of Fig. 1, an unbalanced conical aerial 2 fed by the coaxial line 3 is employed, the energizing terminal of the aerial being adjacent the flat conducting plane 4 on which is mounted the dielectric hemisphere 1 surrounding the aerial. In the embodiment of the invention illustrated in Figs. 3 and 4, a half wavelength slot aerial 2 is formed in a square metal plate 4 on one side of which is mounted the hemisphere 1 of dielectric material. Plate 4 also forms one wall of a cavity resonator 6 filled with the same dielectric material, the other parallel wall 7 being spaced from the plate 4 by one quarter wavelength in the dielectric material. The slot and resonator are energized by the coaxial line 3, the conductors 8 and 9 of which are connected to the centres of the sides of the slot. The outer conductor 9 is insulated from the plate 7 and due to the quarter wavelength spacing of this plate from plate 4, the unbalanced feeder can be used without reactively loading one side of the slot.
Patent GB-272618-A (GB)
Title: Double projection apparatus
IPC: G03B21/00
Filed: 1926-03-19
Abstract: 272,618. Kutassy, A. von. March 19, 1926. Opfical-projection apparatus.-Two complete and independent projectors, one for motion pictures and the other for a series of stationary pictures, are alternatively driven from a common motor under an automatic control, and project on to a common screen. As shown, a motor 5 drives a pulley 7 on a hollow shaft 19 turning with a solid shaft 20, the shaft 20 being axially movable and carrying clutch members 23, 24 alternatively engaging clutch members secured to pulleys 8, 14 which respectively drive the kinematograph projector 1 and the chain of slides in the still projector 12. The position of the shaft 20 is controlled by an electromagnet 28 through an armature 31, the armature being pivoted at 30, pivotally connected at 33 to the shaft 20, and pulled by a spring 27. Current is supplied to the magnet 28 from the terminals 34, 35 under the initial control of metallic knobs 51 on the film 4, which, at desired points in the film feed, bridge the space between two metallic rollers 47, and complete a circuit 46, 45, 38 including an electromagnet 43. When the magnet 43 is energized, the armature 41 is attracted, thus completing the circuit of the magnet 28 by engaging a contact 37, and the shaft 20 is moved to the right to put the projector 12 into operation. The projector 12 rotates a conducting disc 57 carrying an insulating portion upon which a contact 55 rests when the projector 12, is out of use: movement of the disc 57 completes a circuit 36, 53, 52 for the magnet 28, this circuit being maintained during the remainder of the revolution of the disc 57, and the original circuit for the magnet 28, being broken by a pin 62 which temporarily engages a contact 63 to complete the circuit of a magnet 59 which attracts the armature 41. When, after one revolution of the disc 57, the contact again engages the insulating section, the magnet 28 is de-energized and the shaft 20 moves to the left, to effect driving connection for the projector 1, and break the connection to the projector 12. The slides in the projector 12 are carried by frames 67, Fig. 6, linked together to form an endless chain; the frames contain cover glasses for the slides, and are provided with projections 71, and with springs 70 tending to cause the frames to turn relatively to one another in opposite directions so that they may be housed in a magazine 69, Fig. 5. The lowermost frame in the magazine is carried by a star-shaped wheel 73 at each side of it, the wheels being controlled by an escapement device 74, 75, to permit the frames to pass one by one from the bottom of the magazine. The chain of frames 68 passes over rotating blocks 76, 77, 78, the block 76 being rotated intermittently by a maltese cross mechan. ism, the pin-wheel 64 of which also operates the escapement device 74, 75 through links 79, 80.
Patent GB-625478-A (GB)
Title: Improvements in or relating to multichannel radio systems for communication with moving vehicles
IPC: H04B7/155
Filed: 1947-03-21
Abstract: 625,478. Multiplex pulse signaling ; radiolocation. STANDARD TELEPHONES & CABLES, Ltd. March 21, 1947, No. 7814. Convention date, March 28, 1946. [Classes 40 (v) and 40 (vii)] In a pulse multiplex system for communication between terminal stations linked by a chain of repeaters and mobile units, the insertion by the repeaters of the signals from the mobile units in correct time position in the interleaved pulse train is controlled by measuring the time delay between pulses transmitted to, and pulses received from, the mobile units. An interleaved pulse train from the west terminal is passed to the east terminal on one carrier and back on a second carrier by a cable or radio link having at intervals repeater stations which also transmit the east-bound signal to the mobile units. At each mobile unit the signal received on frequency f1 by receiver 24, Fig. 4, is demodulated and the channel allotted to that unit is selected at 31 by a base wave generated at 27 from marker pulses separated at 26 and variably delayed at 28. Signals are transmitted from 54 on frequency f3 and are spaced from the marker pulses according to channel by a variable delay device 44. The modulating wave and the marker pulses for the mobile transmitter are derived from pulses received on frequency f2 at 41 from a third transmitter 37, Fig. 2, at the repeater station which transmits only marker pulses separated at 34 from the west bound pulse train. Each of the mobile units transmits either on a separate carrier frequency or, in a modification Fig. 5 (not shown), the pulses are of characteristic widths. At the repeater, such signals received at 57 are selected for the appropriate channel according to frequency or pulse width by selectors such as 65 in inserter circuits 62 ... 64. Considering any one channel, the marker pulses are selected at 66 and mixed at 83 with the original marker pulses from selector 34. The two pulses trigger a multivibrator 75 which produces pulses having a duration proportional to the delay between the original marker pulses and the incoming marker pulses. These variable duration pulses are translated into variable amplitude pulses at 77 and applied to winding 82 to vary the value of the inductances 79 forming a variable delay line through which the signals from selector 65 are passed to a mixer 86 where they are interleaved in the west-bound pulse train. In a modification, Fig. 6, (not shown), the output of the multivibrator is passed through a phase inverter to a saw-tooth wave generator, the output of which is applied to the variable delay line circuit. Inserter circuits as 62 ... 64 may also be provided at either or both terminal stations. In a modified system, transmitter 13 at the east-bound repeater and receiver 41 at the mobile unit are disconnected and the whole of the west-bound signal is transmitted from 37 by opening switch 99 and changing over switches 100, 101 and switches 102, 103. Receiver 24 is then tuned to f2 instead of f1. Specification 604,203 is referred to.
Patent GB-1169746-A (GB)
Title: Improvements in or relating to Pivotal Hand Tools
Inventor: SOMERVELL ROLAND WILLIAM GORDO
IPC: B26B13/28
Filed: 1966-02-23
Abstract: 1,169,746. Scissors and shears. WILKINSON SWORD Ltd. 22 Feb., 1967 [23 Feb., 1966], No. 7913/66. Heading B4B. [Also in Division E2] A pair of scissors or shears comprises two pivotally connected blade members 20, 21 each having a resilient portion 27, 28 arranged to bear against a pivot member, such as a ball 31 or roller 32, located in an aperture or apertures formed in one or both of the blade members. The blade members are stamped from sheet metal as shown in Fig. 1, the portion 27 or 28 then being cranked and sprung to one side of the blade portion and secured such as by a rivet 33; the rivet may be replaced by a screw in order to adjust the pressure on the portions 27 or 28 on the pivot member. Steel balls 40 may be located in recesses formed in the inner mating surfaces of the blade members in order to urge the cutting edges of the blades into contact. In a modification, the resilient portion 27, 28 may be formed as separate handle portions secured to the handle of the blade members. In further modifications the pivot ball 31 may be replaced by a flanged pin which may have a threaded portion in order to adjust the pressure applied by the resilient portion, or by a screw having its head end located in a clearance hole in one blade member and being screw-threaded into the other blade member. One of the handles of the scissors may be in the form of a twopronged claw.
Patent GB-194156-A (GB)
Title: Improvements in printing ink
IPC: C09D11/02
Filed: 1922-03-20
Abstract: 194,156. Ishida, K.. March 20, 1922. Ink.-Printing-ink consists of an emulsion of an oily mixture containing petroleum or other mineral oil, resin, and lampblack or other colouring-matter, and a watery mixture containing catechu or other tannin material, sodium or other soluble silicate, aluminium or other insoluble soap or resinate, formaldehyde, gum arabic, and, optionally, .sodium or other alkaline carbonate. The ink can be diluted with water to control its viscosity.
Patent GB-924490-A (GB)
Title: Improvements relating to steam tight covers for stop valve bodies
Inventor: WHITEHOUSE REGINALD GEORGE
IPC: F16J13/12
Filed: 1961-03-06
Abstract: 924,490. Covers for resisting fluid pressure. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Feb. 20, 1962 [March 6, 1961], No. 8149/61. Class 123 (1). [Also in Group XXIX] In a cover for closing an opening in a valve body or similar vessel 1 containing steam at a high pressure an inner cover 5 of sheet metal, for example, stainless steel, is peripherally held against a radial sealing face 3 within the opening, a rigid outer cover 8 being screwed into the opening and having a spigot portion 7 bearing against the inner cover radially inward of the sealing face, a clamping ring 6 surrounding the spigot portion and screws passing through the outer cover at the periphery for forcing the clamping ring on to the inner cover and forcing the latter against the sealing face. The sealing face includes a joint ring 4 of a metal or other known material used in steam vessels. The thread on the outer cover is of a buttress form with the load resisting flank opposing the steam pressures on the cover. A dust cover 10 is fastened to the top of the body and this is provided with a leak indication pipe 11.
Patent GB-736964-A (GB)
Title: Improvements in or relating to the treatment of cellulose esters
IPC: C08B3/30
Filed: 1952-03-31
Abstract: The thermal colour-stability of water-insoluble cellulose esters of carboxylic acids (including mixed esters and ether-esters in which the number of ester groups exceeds the number of ether groups in the molecule), prepared in the presence of sulphuric acid as catalyst in the form of an aqueous slurry having a pH below 7, is improved by bleaching the ester with a water-soluble inorganic chlorite, the pH being adjusted with acetic acid or a phosphoric acid, or a derivative of phosphoric acid whose aqueous solutions have a pH less than 7. The concentration of the cellulose ester in granular or flake form in the slurry may be 7-15 per cent by weight and the pH of the slurry may be adjusted to 3-6, preferably 4-5.  The mixture may be heated to 75-130 DEG  C. under a pressure sufficient to maintain the water in the liquid phase.  An aqueous 3 to 5 per cent solution of the chlorite may then be added and the bleaching effected with agitation in 0.5-6 hours, preferably 1-3 hours. The bleached ester is then drained and washed with water.  The proportion of chlorite used may be 0.001 to 0.015 part per part of cellulose ester.  The chlorite may be a water-soluble alkali-metal or alkaline-earth metal chlorite or ammonium chlorite.  The bleaching of the cellulose ester may also be effected by passing chlorine dioxide gas into an aqueous slurry of the ester having a pH above 7 but not over 9, the chlorine dioxide being absorbed by the alkali present with the formation of a chlorite and the mixture being subsequently acidified with one of the prescribed acidifying agents to the desired pH below 7.  The bleaching may be carried out at any point in the production of the cellulose ester after the precipitation of the ester by the addition of water to the esterification reaction mixture.  Thus the bleaching may be effected in a slurry formed by preliminary washing of the ester with water after its precipitation, sufficient acetic or other acid being retained by the precipitated ester particles to render the addition of further acid to adjust the pH unnecessary.  In an example 3000 parts by weight of cellulose acetate (prepared with sulphuric acid as catalyst) in the form of a 14 per cent slurry in water are bleached for one hour at 95 DEG  C. with 6.5 parts of sodium chlorite, drained and washed in the usual manner.  In further examples aqueous slurries of cellulose acetate which have been adjusted to pH 4 with orthophosphoric acid are bleached at 90-95 DEG C. in a stainless steel vessel with 350, 700 and 1400 parts of sodium chlorite per million of slurry.  No corrosion of the stainless steel occurs.  Specification 693,699 is referred to.
Patent GB-1263973-A (GB)
Title: Apparatus for storing or conveying bulk material
Inventor: HAALAND PER
IPC: B29C65/00
Filed: 1969-02-14
Abstract: 1,263,973. Fasteners. A.S. DEN NORSKE REMFABRIK 14 Feb., 1969 [16 Feb., 1968], No. 8268/69. Heading F2H. Apparatus for storing or conveying bulk material comprises a surface which is protected by a lining 7 of rubber secured to the surface by a fastener having a spring portion 1 embedded in the lining so that when the lining deforms under the influence of the bulk material the spring portion expands or contracts with it. The surface may be that of a container or conveyer shaft through the wall 6 of which, and into the lining 7, a hole 8 is drilled to receive the fastener. The fastener comprises a screw having a head 2 and a projecting pin 3 to which the spring 1 having portions 4, 5 of different diameter is secured. The tip 16 of the screw cuts into the lining when the fastener is screwed in to the hole. The spring shank may consist of two helical springs and the fasteners may be vulcanized into the lining.
Patent GB-609861-A (GB)
Title: Improvements in or relating to neutralised push-pull amplifiers
IPC: H03F1/16
Filed: 1946-03-19
Abstract: 609,861. Valve amplifying circuits. PHILIPS LAMPS, Ltd. March 19, 1946, No. 8422. Convention date, June 30, 1941. [Classes 40 (v) and 40 (vi)] In a push-pull amplifier in which neutralizing condensers 7, 8 are connected between the output electrode of each valve and the grid of the opposite. valve, parasitic oscillation is prevented by connecting a short-circuited transmission line 9 between the grid terminals of the two neutralizing condensers. The length of the line is arranged to approximate to an odd number of quarter wavelengths at signal frequency and an even number at the frequency of parasitic oscillation. When the anode of the valve forms part of the valve walls the neutralising condenser electrode may concentrically surround part of the anode, connection being made to the transmission line at a point diametrically opposite to the point of connection to the electrode of the grid. Neutralizing readjustments consequent upon changes of tuning of the amplifier may be carried out by varying the length of the line.