baber/WOPTO huggingface dataset:
Patent GB-902751-A (GB)
Title: Improvements in or relating to electronic relay devices
IPC: H04L27/04
Filed: 1959-05-07
Abstract: 902,751. Diode-switching circuits. TELEFONAKTIEBOLAGET L. M. ERICSSON. May 7, 1959 [May 9, 1958], No. 15734/59. Class 40 (6). In a switch or gate in which a signal is controlled by a D.C. control voltage two rectifiers are connected in parallel with the control voltage and directed so as to conduct in the same direction. The rectifiers have a sharp " knee " in their characteristics at a predetermined voltage, so that the switch has a high attenuation when the control voltage is not applied to it provided that the voltage of the signal to be switched is below that corresponding to the " knee " of the characteristic of the rectifiers. Fig. 1 shows a circuit for switching a signal from a generator 1 to a load 9 in dependence upon a D.C. control voltage applied between terminals 14, 15. Rectifiers 5, 6 are constituted by Zener diodes having a sharp " knee " in their voltage current characteristics, Fig. 2 (not shown). When terminal 14 is positive with respect to terminal 15 diodes 5 and 6 are conductive and diodes 10 and 11 cut-off so that the signal 1 is connected to load 9. When the D.C. voltage has the opposite polarity diodes 5 and 6 are blocked and 10 and 11 conductive so that the switch is open. When the D.C. circuit is broken so that the rectifiers are unbiased, provided that the voltage of signal source 1 is below the potential of the " knee," the switch presents a high attenuation to the signal source 1. In the modification shown in Fig. 3 the rectifiers 10, 11 are replaced by a resistor 16 and the combination of a resistor 17 and rectifier 18 across the D.C. control supply removes the value of the input resistance from that of the control circuit. In a further modification of Fig. 1, the terminal 15 of the control source is applied to the mid-point of a resistive potential divider connected across the primary of transformer 4, Fig. 4 (not shown).
Patent GB-1244652-A (GB)
Title: Frequency selective active arrangements
Inventor: BEALE JULIAN ROBERT ANTHONY
IPC: H03H11/04
Filed: 1968-04-02
Abstract: 1,244,652. Integrated circuits. MULLARD Ltd. 13 March, 1969 [2 April, 1968], No. 15737/68. Heading HIK. [Also in Division H3] A frequency selective circuit comprises an active part formed as an integrated circuit in a body of semi-conductor material, and a frequency selective part in the form of a piezoelectric delay line. The integrated circuit, Fig. 5, comprises a silicon substrate 30 on which transistors 31, 32 and resistor 33 are formed. The frequency seletive part comprises a wafer 39 of lithium niobate on which is formed an array 40 of electrodes, Fig. 6 (not shown), comprising an input set 41, an output set 42, and a common set 43. The distance between adjacent electrodes is N 2  of the resonant frequency.
Patent GB-737663-A (GB)
Title: Improvements relating to indexing mechanisms for rotary electric switches
IPC: H01H19/11
Filed: 1952-06-23
Abstract: 737,663. Multi-position switches. BUSCHJAEGER DURENER METALLWERKE AKT.-GES. June 23, 1952 [June 25, 1951], No. 15794/52. Class 38 (5). The indexing or positioning mechanism of a rotary switch comprises a recessed cam disc 3 co-operating with detents carried by a supporting member, the supporting member being so constructed that different arrangements of detents may be made to determine the number of switching positions. In the Figure, if the supporting member carries spring-biased detents 1, 2 only and a disc 3 with four equally spaced recesses is used, then the mechanism will provide four positions. If detents 1, 6 and 7 spaced 120 degrees apart are used in conjunction with a disc having three recesses, then three positions are provided. Detents 8, 9, spaced 72 degrees apart, used in conjunction with the detent 2 and a disc having five recesses provide five positions.
Patent GB-228432-A (GB)
Title: Improvements in or relating to variable resistance devices
IPC: H01C10/34
Filed: 1924-07-01
Abstract: 228,432. Igranic Electric Co., Ltd., and Curtis, A. H. July 1, 1924. Variable resistances.-In a variable resistance device of the Kind described in Specification 222,634 wherein a contactor is movable over a resistor in the form of an interrupted trace or line on an insulating support and the contactor and resistor are formed of a soft material such as graphite which may be readily removed or deposited by friction, means are provided whereby the resistivity of the resistor is maintained substantially constant. To this end the graphite resistor is contained in a groove on the periphery of an annulus 1<b> formed on an insulating support 1. The graphites contactor 6 is mounted in an arm 3 on a rotatable spindle 2 and is spring- pressed against the resistor. A saw cut is formed in the resistor and adjacent this cut is a screw 13 one end of which contacts with the resistor and the other end with a metal plate 14 carrying a terminal 11. The contactor is connected through the arm 3, spindle 2, and a plate 12 to a terminal 10. In modifications, several grooves are provided on the annulus 1<b> and are slightly inclined to the direction of movement of the contactor, or the surface of the annulus may be knurled or roughened to accommodate the resistor. The grooves or roughenings limit the extent to which graphite may be deposited on, or removed from, the resistor. The device may be modified to serve as a potentiometer.
Patent GB-385210-A (GB)
Title: Improvements in or relating to cigarette making machines
IPC: A24C5/39
Filed: 1932-06-04
Abstract: 385,210. Cigarette-making machines. RUAU, F. F. and MOLINS MACHINE CO., Ltd., 2, Evelyn Street, Deptford, London. June 4, 1932, No. 15848. [Class 130.] In order to obtain a uniform feed of tobacco, a roll of tobacco of substantially uniform amount is maintained between the combing and brushing rollers of the feeding-apparatus. Fig. 1 shows such a roll T between the combing- roller 3 and the brushing-roller 4, and its uniformity is maintained by means of a rake 7 oscillated about a pivot 6 by links 19, 20, and also by a pressing-device 8 which is raised and lowered on to the roll by a parallel linkwork 10, 11 and mechanism 15 .. 18. A feeding-device comprising an oscillating flap 21 and rake 23, Fig. 2, may also be provided for the hopper 2. Specification 370,640 is referred to.
Patent GB-183324-A (GB)
Title: Improvements in or relating to automatic machines for feeding fibrous materials to carding engines or other preparing machines
IPC: D01G23/04
Filed: 1921-06-09
Abstract: 183,324. Walker, J. W., and Platt Bros. & Co., Ltd. June 9, 1921. Feeding carding-engines &c.-In an automatic feeding-machine the lifting lattice a, Fig. 2, is arranged nearly vertically and the movable back b is hinged at a point b<1> some distance awav from the lower end of the lattice. The back b is moved forwards by weights d sliding on guides d', and as the back moves forwards certain of the weights are removed by projections i on them engaging fixed stops i<@4>. The weights are attached by cords b<3> to projecting bars b<2> which slide over the curved' tops c' of the sides of the hopper. The back is held during filling by pivoted spring catches e engaging the bars b<2>. The catches e carry projecting arms e<5>, the ends of which lie in the path of catches f<1> on the weights d. In the filling position the catch f<1> lies just below the arm e<5>, but if the back is pulled further out the catch rises above the arm, so that on releasing the back, the arm e<5> is engaged and depresses the catch e and allows the back b to move continuously forward. Other forms of catches operating in this manner may be employed. A portion of the back may be hinged to turn outwards and downwards to facilitate emptying the hopper.
Patent GB-477833-A (GB)
Title: Improvements in and relating to soot-blowers
IPC: F28G3/16
Filed: 1936-06-06
Abstract: 477,833. Soot blowers. WILSON, A. M. June 6, 1936, Nos. 15880/36 and 13930/37. [Class 99 (ii)] A soot-blower tube normally located in a boiler wall is alternately advanced into operative position and retracted therefrom by a reciprocating engine which comprises a piston 20, located in a cylinder 21 and secured to an extension 23 of the blower tube, and a piston valve 31 controlling steam supply and exhaust - pipes 29, 32, reversal of the piston valve to reverse the stroke of the piston being effected by a pin 24 which is carried by the extension 23 and engages alternately one of two lugs 35 on the valve rod 36 towards the ends of its travel. Preferably the pin 24 engages a helical cam track 25 in the casing 26 of the blower extension 23 so that an angular movement is superposed on the axial movement of the blower tube, and the piston rod 22 may be provided with an extension 27 fitted with a hand wheel 28 for manual operation of the blower. The supply of steam to the engine is controlled by a valve 30 which is operated by a solenoid 33 in an electric circuit 38 which includes a main switch 34, and means. e.g. a ratchet wheel mounted on a shaft 42 and a pawl actuated by a striker 41 on the valve rod 36, may be provided for breaking the circuit and automatically cutting off the steam supply to the blower after a predetermined number of reciprocations thereof, the striker 41 preferably being adjustably mounted on the rod 36 so as to enable the number of reciprocations to be regulated. The switch 34 may control the circuits of all the blowers of one boiler or of the plant, a secondary switch El, E<2> ... being fitted in each blower circuit.
Patent GB-896228-A (GB)
Title: Convex upper platen for a pulp press
Inventor: LAMB GEORGE EMERSON
IPC: D21J7/00
Filed: 1960-05-05
Abstract: 896,228. Pressing paper pulp. LAMB GRAYS HARBOR CO. Inc. May 5, 1960, No. 15896/60. Class 96. [Also in Group XVII] A press, e.g. for rapidly compressing paper pulp, e.g. as bales 14 has a perforated upper platen 16, domed or otherwise shaped to apply pressure first in the middle and then progressively outwardly so that air may readily escape sidewise &c. Air passing through the perforations 19 of the platen 16 escapes via channels 18. The cross-head 13, which carries the platen 16 may be moved, e.g. by an hydraulic cylinder 15 &c.
Patent GB-936636-A (GB)
Title: Improvements in or relating to fluid pressure actuated electric switches
Inventor: PURCHASE ALEX ROBERT
IPC: H01H35/32
Filed: 1961-05-03
Abstract: 936,636. Fluid actuation of switches. NORMALAIR Ltd. May 2, 1962 [May 3, 1961], No. 15944/61. Class 38 (5). A switch assembly includes a spring-biased fluid pressure-sensitive bellows 16 which acts upon a beam 23 in turn actuating a microswitch 25 through its plunger 26, one end of beam 23 being pivoted between two spaced apart pivots 24, 30, of which pivot 30 is adjustable. The microswitch 25 is mounted by way of two bolts 27 which pass through the switch and a surrounding metal casing 10. The bolt nearest the cross-bar of the T-shaped beam 23 comprises a shaft carrying a cam 30 providing the adjustable pivot point of the beam. The other bolt 27 passes through elongated slots in the casing 10 to give a coarse adjustment for the switch in its initial setting. Excessive movement of bellows 16 is limited by stop means when the bellows contacts a bridge-piece 20.
Patent GB-1182238-A (GB)
Title: Secondary Battery.
IPC: H01M10/39
Filed: 1968-04-03
Abstract: 1,182,238. Alkali-metal-sulphur secondary cells. FORD MOTOR CO. Ltd. 3 April, 1968 [3 April, 1967], No. 15976/68. Heading H1B. Alkali metal-sulphur cells in which the anode and cathode form opposite walls of a container 11 and the compartment therebetween is divided by a cationically conductive solid electrolyte 13 into anodic and cathode reaction zones 15, 17, contain reactant feeders comprising a porous object in each reaction zone, that in the anodic reaction zone comprising a first object 33 with pores of larger diameter in contact with a second object 31 with pores of smaller diameter which is in contact with the electrolyte 13. As shown, the anodic reactant feeder consists of a finely porous steel plate 31 and a porous steel plate or grid 33 and the cathodic reactant feeder consists of a finely porous carbon plate 41 and coarsely porous carbon plate 43. Container 11 is made of a Ni/Fe alloy with its interior coated with Al and exterior end surfaces coated with Ag to ensure good contact between cells. The electrolyte 13 is a sintered polycrystalline plate of Li 2 O-0À99, Na 2 O 4 -9.99 and Al 2 O 3 -89À02 wt. per cent. The active materials being Na and S or Na 2 S 5  containing finely-divided C. Reference has been directed by the Comptroller to Specifications 1,137,079, 1,137,080, 1,142,798 and 1,142,799.
Patent GB-220758-A (GB)
Title: Improvements in calculating machines
IPC: G06C15/38
Filed: 1923-06-20
Abstract: 220,758. Blacher, C. F., and Guy's Calculating Machines, Ltd. June 20, 1923. Transfer mechanism for cam-disc and pin-wheel machines comprises a ten-carrying slide c adapted to project into the path of transfer pins d<1>, d<2> upon the pin-wheel d, the slide being returned to normal inactive position by a cam g upon the pin-wheel and being extended to form spring jaws c<3> which co-operate with a stationary shaft h to lock and locate the slide in its extreme positions. The numeral drum b is rotated from the pinwheel by the pinions e, f, and as it passes from 9 to 0 a cam b<1> thereon acts upon a cam c<4> on the slide c so that the offset end c<1> of this slide moves into the path of the transfer pin d<1> or d<2> which latter is then deflected to actuate the wheel e of the next higher denomination. A slot c<2> in the upper part of the slide c guides the latter on the spindle i of the wheels e. The slide may be of thin spring steel and the shaft h may carry the usual spring-fitted tilting pawls which lock the totalizer pinions f.
Patent GB-644564-A (GB)
Title: Improvements in structural materials
Inventor: POLOVTSEFF BORIS
IPC: B32B27/00
Filed: 1946-05-27
Abstract: 644,564. Compound sheet materials. AIRSCREW CO. & JICWOOD, Ltd. May 27, 1946, No. 16061. [Class 140] [Also in Group XXIII] Veneered composite boards are prepared by superposing a sheet of adhesive material on a veneer sheet then a mass of sawdust or other comminuted wood partially impregnated with an adhesive binder on the sheet of adhesive material then a further sheet of adhesive material on the mass of comminuted wood and finally a further veneer sheet, the sandwich thus formed being subjected to heat and pressure in a press to consolidate it. The veneer sheets may be of fibrous sheet material such as paper, woven or filled material, fabric gauze, wood veneer or asbestos felt, the comminuted wood may be sawdust, wood chips or wood shavings, and may have mixed with it paper which has been subjected to a defibration process, and the adhesive binder may be casein, Scotch glue, or a synthetic resin of the phenol- or urea-formaldehyde class. The pressure may be from 50 to 450 lbs. per square inch and the temperature from 60‹ to 150‹ C. In the examples : (1) a layer of pinewood chips mixed with urea-formaldehyde resin adhesive is sandwiched between two sheets of asbestos felt and subjected to heat and pressure ; (2) a sheet of Kraft paper is covered with a sheet of phenolic glue film then with a layer of birchwood chips mixed with casein glue, then with a further layer of the glue film, then with a layer of Kraft paper and subjected to heat and pressure, and (3) soft wood chips mixed with a urea-formaldehyde adhesive are sandwiched between sheets of paper lacquered with resin on the side next the chips and subjected to heat and pressure. Specification 644,563 is referred to.
Patent GB-321907-A (GB)
Title: Improvements in and relating to bathing caps
IPC: A42B1/12
Filed: 1929-05-24
Abstract: 321,907. Eagle, R. G. May 24, 1929. Caps; waterproof.-A bathing cap A is provided with a strip or ring F of spongy rubber or like elastic cellular material, or an air tube, attached to the inside thereof and surrounding each portion contacting with the ears, the strips or rings being of such thickness that the ears are completely enclosed in the pockets E so formed.
Patent GB-1204464-A (GB)
Title: Improvements in or relating to data recording systems
Inventor: DEUTSCH JAKOB JOHANN
IPC: G06C11/00
Filed: 1969-03-27
Abstract: 1,204,464. Cylinder printing machine. NATIONAL CASH REGISTER CO. 27 March, 1969, No. 16082/69. Heading B6C. [Also in Division G4] In a cylinder printing machine used in association with a cash register the manually movable travelling cylinder is locked on its " home " position by a catch mechanism which is actuated by mechanism which " sets " the type wheels on the printing machine in dependence upon the keys pressed by an operator on the cash register.
Patent GB-725063-A (GB)
Title: Improvements in reciprocating pumps particularly for surgical purposes
IPC: A61M60/35
Filed: 1953-06-11
Abstract: 725,063. Reciprocating electric motors. TREMBLAY, J. L. June 11, 1953, No. 16121/53. Class 35. [Also in Groups VI, XXVIII and XXIX] A reciprocating pump comprises a tube 28 containing two bellows 35, 36 connected at their ends to caps 43, 44 and also to an armature member 34 which is reciprocated by electromagnets 30, 31, 32 surrounding the tube 28; the electromagnet 30 moves the armature in one direction and the electromagnets 31, 32 in the other direction. The tube 28 is welded to a container 14, filled with liquid and fitted with a circulator rotor 23 driven by a motor 20; a heating coil 26 is fitted in the casing to maintain the temperature of the liquid pumped. The system for energizing the electromagnet 30 or the electromagnets 31, 32 includes a commutator driven by a variable-speed electric motor, adjustable to vary the speed of the pump, and actuating two relays alternately controlling the output of each of two thermionic valves. The pressure of the liquid pumped is controlled by varying the voltage and grid bias applied to the valves.
Patent GB-265519-A (GB)
Title: Improvements relating to thermo-electric generators for energising the filament and plate circuits of wireless receiving sets and the like
IPC: H01L35/00
Filed: 1926-03-22
Abstract: 265,519. Roberts, H. A. March 22, 1926. Thermo-electric batteries.- A battery, more particularly for use with wireless sets, consists of insulated rectangular plates A arranged in one or more straight rows in a holder, wires or strips B being cast to the plates and secured together so as to connect them in series. The plates are insulated by asbestos paper C. The holder consists of plates E spaced from the plates A by insulators e, and secured together by bolts e' fitted with springs e<2>. An elasticheating element D may be interposed at one end between two rows of elements, or the twisted wires at the end of a single row of plates may be heated by gas flames.
Patent GB-217058-A (GB)
Title: Improvements in carburettors for internal combustion engines
IPC: F02M7/10
Filed: 1923-06-22
Abstract: 217,058. Veulle, F. H. de. June 22, 1923. Spray carburettors.-In a carburettor of the Kind in which the fuel is supplied by main and compensating nozzles to a row of ducts around the choke tube, separate passages are employed to lead the fuel from the main and compensating nozzles to a groove or grooves around the choke tube with which the fuel ducts communicate. As shown diagrammatically in Fig. 6, fuel is supplied through a submerged main nozzle E<2> to a well E, and through a compensating nozzle D<2> to a vented well D, the supplies being conducted bv separate pipes E<3>, D<4> to grooves B<3>, B<4> around the choke tube. The grooves B<3>, B<4> mav communicate with the bore of the choke tube through ducts merging into common outlets C, or may be provided with separate ducts, which may open into the choke tube in the same or different planes. In a modification, the pipes E<3>, D<4> open into a common groove. A slowrunning nozzle F, which may be controlled by a needle valve, is supplied with fuel from a well D, and opens into a pipe H supplied with air through apertures G, H<2> and leading to the induction pipe A adjacent the throttle A<2>. One of the Provisional Specifications describes a modification in which only one of the fuel supplies is fed through ducts in the choke tube, the other being fed through a nozzle in the bore of the choke tube.
Patent GB-297695-A (GB)
Title: Improvements in and relating to the reproduction of sound records
IPC: G11B11/00
Filed: 1927-06-18
Abstract: 297,695. Brackensey, A. H. June 18, 1927. Transmitters in which a sound-controlled light beam acts on a photoelectric element.- Relates to sound-reproducing apparatus in which a device vibrated by the action of a gramophone or like record on a stylus affects a beam of light acting upon a photo-electric cell, whereby a telephonic receiver is operated. According to the invention, a non-resonant stylus acts as, or is directly connected to a shutter, or carries or is rigidly connected to a reflector, so that the vibrations of the needle directly control the transmission of light to the cell. In the construction shown in Fig. 1 a counterpoised bar 1, pivoted on a fork 4 which can swing about a vertical axis, carries a selenium cell 21, a lamp 24, a pivotally mounted stylus-holder 7, fixed mirrors 15, 16, and a system of lenses. The member 7 is pivoted between screws 10 on the underside of the bar 1, Fig. 7, so that the stylus 12 can engage a record 6, the part 7 having an extension 8 projecting through an aperture in the bar and carrying a mirror 9. Rubber buffers 14 engage the part 8. Tubes 18 carrying lenses 20, 20<a> are arranged in line with the mirrors 15, 16 fixed on supports 17, one tube 18 also supporting the lamp 24. With this arrangement, a beam of light from the lamp is vibrated by the mirror 9 and falls on the cell 21, which is arranged in circuit with amplifying valves and a loud-speaker (not shown). An adjustable shutter may be fixed between the selenium cell and the light source. In a modification, Fig. 5, a slotted screen 22 is fixed between the lamp 24 and the cell 21, and a reed 25a carried by the needle-holder is arranged so as to be vibrated over the slot in the screen 22, mirrors being dispensed with in this case. A further arrangement, (Fig. 4, not shown) comprises a shutter vibrated horizontally across one of two mirrors bv which light is reflected on to the selenium cell. Fig. 6 shows another form of vibratory shutter, comprising two thin strips 26, 27 of cane, parchment &c., fixed together at one end to a clip 28 and attached at their opposite ends to a rigid rod 30 which is connected to the stylus holder. As this vibrates, the strips are flexed so as to produce a varying gap in front of an apertured screen 32, behind which the selenium cell is arranged. Pieces of rubber or the like 34 are attached to the outer faces of the strips 26, 27, so as completely to mask the aperture in the screen when the strips are close together.