baber/WOPTO huggingface dataset:
Patent GB-186822-A (GB)
Title: Improvements in or relating to means for controlling air compressors
IPC: F04B49/22
Filed: 1921-09-23
Abstract: 186,822. Goodwin, A., and Pratt, F. W. Sept. 23, 1921. Regulating compression.-The air supply to a compressor is controlled in accordance with the delivery pressure by a double seated balanced valve pressed in one direction by a spring and in the other direction by a piston the cylinder of which communicates through an adjustably loaded valve with a chamber open to the delivery pressure. The controlling-valve is a floating valve normally held by an independent load on a seat, the opening of which is the chamber outlet, but raised by excess pressure to engage one of a number of larger interchangeable seats. As shown, a casing a provided with an air inlet b and an outlet c to the, compressor encloses a valve e having a supporting-spring f below and a piston g above. The piston moves in a cylinder h formed in the casing and connected by a pas. sage i with a cylinder j containing a ball valve n adapted to close, a cavity k communicating with the air receiver or the delivery pipe of the compressor. The valve is held down by an adjustably weighted lever s guided by a fork v, until the air pressure rises sufficiently, when the ball valve is forced against its upper larger seating which is constituted bv one of a set of interchangeable screw-threaded rings o; the compressed air then flows through the passage i and depresses the piston, thereby throttling or closing the air inlet.
Patent GB-630595-A (GB)
Title: Improvements in or relating to drum stands for use for instance for electrical cables
IPC: B65H49/32
Filed: 1947-09-16
Abstract: 630,595. Load-handling machines. STANDARD TELEPHONES & CABLES, Ltd., BARNES, A. W., and SKELLERN, H. Sept. 16, 1947, No 25278. [Class 78 (iii)] [Also in Group XXVIII] A cable &c. drum carried by cantilever frames 4 is raised by admitting fluid to the top of each of a pair of hydraulic cylinders 5 the piston-rods of which are connected to the frames. At the end of the movement, a latch 6 on each frame 4 engages a pin 35 on the corresponding cylinder and holds the drum in the raised position. To lower the drum a pedal 13 is depressed whereby a rod 15 releases the latch, fluid being simultaneously admitted below the piston, the fluid above the piston escaping through a needle valve. The frames 4 and cylinders are adjustable laterally for different widths of drums (see Group XXVIII).
Patent GB-1007235-A (GB)
Title: Hand brake linkage
Inventor: MURRAY JOSEPH PETER
IPC: B60T11/08
Filed: 1964-06-19
Abstract: 1,007,235. Hand brakes. FORD MOTOR CO. Ltd. June 19, 1964, No. 25414/64. Heading F2E. An operating handle is connected to the brake of a motor vehicle through a linkage 1-4-6-9 such that the mechanical advantage increases progressively as the handle is moved from a "brake-off" to a " brake full on " position. The handle 12 connects at 13 with one end of a first lever 1 pivoted at its other end at 2 on a fixed bracket 21. A link 4 (see Fig. 2) has one end connected to the lever 1 at 17 intermediate its ends and the other end at 11 to one end of a second lever 6 of which the other end is pivoted at 7 on the fixed bracket 21. The brake actuating cable 9 is connected to the lever 6 at 10 intermediate its ends. By considering the geometry of the linkage the Specification demonstrates that it has the required, progressive mechanical advantage. The handle 12 slides in a guide 14 fixed to the vehicle at 27 and is held by a spring catch 22. The link 4 is joined between its pivot point 20 and the stud at 17 on the lever 1 by a screw 18 with a knob 19 which can alter the position of a connecting link 16 to adjust the brake from the driver's seat. A return spring 25 is connected between the lever 6 and the bracket 21. In the embodiment illustrated in Fig. 2 the adjusting screw 18 takes the place of the link 4 and the brake cable 9 runs round an arc 6c formed on the lever 6 of which the pivot 1 is at the opposite end to that in Fig. 1.
Patent GB-1511959-A (GB)
Title: Rotary machine monitoring apparatus
IPC: G01P1/10
Filed: 1976-06-18
Abstract: 1511959 Counting apparatus FERNOTEX FERNOST-TEXTILHANDEL GmbH 18 June 1976 [20 June 1975] 25480/76 Heading G4D Apparatus for monitoring operation of a machine comprises a tachoalternator driven by the machine and counting circuits driven by output pulses of the alternator during operating periods of the machine, the alternator also providing the power supply to the counting circuits. Several counters may be employed to count the number of revolutions the machine is operating normally and under various abnormal conditions. The apparatus may also include means for determining from the pulses the speed of the machine and for counting the pulses during start up of the machine to control the sequence of starting operations. A small dry accumulator is employed to store power for use in the standby and starting periods.
Patent GB-1263190-A (GB)
Title: Static tap changer apparatus
IPC: H02G1/14
Filed: 1969-05-19
Abstract: 1,263,190. Thyristor switching circuits. WESTINGHOUSE ELECTRIC CORP. 19 May, 1969 [11 June, 1968], No. 25491/69. Heading H3T. [Also in Divisions G3 and H1] Thyristor switches 34, 36, 38, 40, 42 of a transformer tap-changing system are controlled by pulses from a square wave oscillator 120 consisting of two Darlington circuits in flip-flop, under control of switches 96, 114, 115, 116 which are rendered conductive in succession by Schmitt trigger threshold devices 170, 172, 174, 176 with the rise of a ramp voltage from regulator means 18 associated with the load circuit. In the system for operation at unity power factor shown in Fig. 1 switching of the Schmitt triggers is arranged to take place at the zero points of the A.C. voltage supply wave by a transistor 221 which conducts as the square pulse from 120 increases to a maximum, connecting conductor 188 to ground and momentarily dropping the emitter voltage of transistors 181 so lowering the trigger thresholds. In another arrangement for operation at a lagging power factor the Schmitt triggers are provided with turn-on and turn-off pulses at e.g. 60 degrees before the A.C. supply voltage zero crossing point by a steering circuit 280 (Fig. 3, not shown) including means providing a unidirectional square wave voltage leading the A.C. supply voltage by 60 degrees. This leading square wave voltage is applied to a transistor circuit (290, 291, 299) which applies small positive and negative pulses to the Schmitt triggers to lower and raise their thresholds. In this arrangement the bases of the switch transistors (150) are connected to the Schmitt triggers through Zener diodes the latter being rendered non-conductive in succession to disconnect the associated taps by suitably connected diodes 311, 312, 316, 324 when change-up to a higher voltage tap is effected.
Patent GB-887777-A (GB)
Title: A sifting device and method for filtering with the aid of the sifting device
IPC: B03B4/04
Filed: 1959-07-24
Abstract: A method of producing tobacco sheet material comprises wet-grinding the tobacco to form a slurry, forming a film of the slurry on the surface of a continuously-moving endless filtering belt, and applying a decreased pressure to the other side of the belt to remove at least 80% of the liquid by means of a suction-box; the suction-box intermittently follows the movement of the belt, starting from a certain position and returning to that position, suction being applied mainly during the time that the suction-box is following the movement of the belt.  The preferred slurry concentration is 1 part of ground tobacco to 40 parts of liquid by weight.
Patent GB-1346483-A (GB)
Title: Rear view mirror for vehicles
IPC: B60R1/08
Filed: 1971-04-19
Abstract: 1346483 Rear view mirror K A GRELL 19 April 1971 [25 March 1970 5 Feb 1971] 25532/71 Heading B7J [Also in Division G1] An anti-dazzle rear view mirror comprises a tiltable mirror glass 1, silvered on the outside at l<SP>1</SP> and pivotable to a housing 4 at 2, behind a fixed glass 3, the mirror glass being tilted to its anti-dazzle position by the action of an electromagnet 11 the core 12 of which, when energized, repels a permanent magnet 13 and attracts an iron core 14 both of which are attached as shown to a U-shaped cross-section extension 10 which is attached to a bracket 9 glued to the mirror glass, the electromagnet being energized by a control relay 6 controlled by a light sensitive receiver 5 attached to a non-silvered area 5<SP>1</SP> of the mirror; when a predetermined amount of light impinges on the receiver the electromagnet is energized and the mirror glass tilted so as to avoid dazzling (Fig. 4) when the light falls below this level the electromagnet is de-energized and the magnet 13 is attracted to the core 12 of the electromagnet thus returning the mirror glass to its normal position (Fig. 3); the electromagnet, control unit, mirror glass and permanent magnet are all contained within a housing 4. The electromagnet 11, relay 6 and receiver 5 are connected in a circuit having current supply lines 18, 19 and including an adjustable resistor 20 and transistor 22, as described with reference to Fig. 13.
Patent GB-502365-A (GB)
Title: Improvements in and relating to two pressure steam generating plant
IPC: F22B33/00
Filed: 1937-09-22
Abstract: 502,365. Compound steam boilers. BAUER, G. Sept. 22, 1937, No. 25714. [Class 123 (ii)] Steam boiler plant comprises a high pressure water - tube boiler with a furnace 5 bounded where the smoke gas duct 6 starts from it by tube banks or groups 4, a superheater 7, a feedwater heater 8 and air heater 9, and a low pressure water - tube boiler having upper and lower drums 10, 11 connected by tube groups 12 arranged in the duct beyond the feedwater heater and optionally replacing the air heater. In a modification, the tube groups 12 screen the duct walls and the sides and top or top and bottom of the air heater. The low pressure boiler may also screen other spaces or conduits. The low pressure steam may be led to a condenser on the main steam pipe being closed or the engine reversed ; or flap valves in the smoke gas offtake may exclude the low pressure boiler from the gas path. The low pressure boiler feedwater may be controlled in accordance with the steam pressure of the boiler at the delivery point.
Patent GB-1604778-A (GB)
Title: Flexible fastener attachments
IPC: B65C1/00
Filed: 1978-05-31
Abstract: The fastening-element strip made of plastic is formed by a row of interconnected fastening elements (60) which each consist of two elongate side parts (60A, 60B) connected to one another by means of a transverse web (60C). One side part (60A) is designed as a small bar and the other side part (60B) as a head piece. The strip is designed so that it can be introduced as a whole into a stapling machine, in which individual fastening elements can be separated from the strip. This stapling machine possesses a slotted hollow needle, in which the small bars, connected by layers of material, are guided. <IMAGE>
Patent GB-906307-A (GB)
Title: Improvements in or relating to machines for spreading chippings for surfacing purposes
Inventor: POWNALL JOHN EMERSON
IPC: E01C19/48
Filed: 1960-07-25
Abstract: 906,307. Roads. PHOENIX ENGINEERING CO. Ltd. June 29, 1961 [July 25, 1960], No. 25770/60. Class 107. Coated chippings fed from one side into a hopper 1 are spread laterally by a screw 5 over an oscillating rake bar 2 comprising rows of serrated prongs which break up the lumps into which the chippings tend to agglomerate. The flow of chippings on to the ground is controlled by a feed roller 3 and adjustable feed gate 4. The bar 2, roller 3 and screw 5 are driven via gear-boxes 9, 11 and 14, respectively from a power unit 8. The rollers 3 may be alternatively driven from main rollers 7 and a roller 6 may be provided to roll material in the gap between the rollers 7.
Patent GB-1469973-A (GB)
Title: Semiconductor device incorporating a control electrode
Inventor: SUNDSTROM D
IPC: H01L23/051
Filed: 1974-06-11
Abstract: 1469973 Semi-conductor devices ASEA AB 11 June 1974 [12 June 1973] 25791/74 Heading H1K A semi-conductor device 13 is enclosed in a box comprising a bottom 10, 11 and a metallic lid 1, 2 on either side of the device 13, and two insulating rings 3, 12 fixed to each other via a metallic ring 6 to which a control electrode 7 is connected, the control electrode 7 extending across the ring 6 and having a projecting contact part 8 which is pressed against the device 13 only through the anchoring of the electrode 7 to the ring 6. The ring 6 and the electrode 7 are preferably formed in one piece by punching out from a metal sheet and the insulating rings 3,12 are ceramic. The lid part 2 is fixed to the ring 3 by brazing or by epoxy resin adhesive and the bottom part 11 and the ring 12 are similarly secured. In an alternative embodiment, rings (6a, 15), Fig. 8 (not shown), are respectively secured to the rings 3, 12 and joined together by soldering or welding. The device may be provided with a cooling body. The device is may be a Si thyristor and the metallic parts 1, 2, 10, 11 may be Cu, Fe, Fe-Ni alloy or Fe-Ni-Co alloy.
Patent GB-639951-A (GB)
Title: Improvements in method of treating sugar-containing solutions
IPC: C13B20/00
Filed: 1947-09-23
Abstract: Sugar-containing solutions are purified by adding 0.25-6.0 per cent on weight of sugar solids, i.e., sufficient to raise pH of the solution to about 9-10, of an activated mixture of a Mg compound-containing material, e.g., hydroxide or carbonate, and the so-called combined waste products resulting from the manufacture of Portland cement clinker, heating to about 90 DEG C. removing the resulting precipitate and adjusting the pH from about 5.0 to about 7.3, e.g., by adding phosphoric acid, reheating to about 90 DEG C and removing the resulting precipitate. The mixture of the Mg-containing material and the waste products is activated by calcining at 600-800 DEG C for about 5-30 minutes and is used in a proportion of about 70-30 to 30-70 if hydroxide used or 75-25 to 45-55 if carbonate used. U.S.A. Specifications 1,939,921, 2,006,939, 2,021,623, 2,028,313, 2,130,574, 2,144,254, 2.161,010, 2 161,011, 2,162,525, 2,214,716, 2,214,717 are referred to.
Patent GB-957948-A (GB)
Title: Control systems for navigable craft
Inventor: VACQUIER VICTOR
IPC: B63G8/14
Filed: 1960-07-26
Abstract: 957,948. Automatic control of navigable craft. SPERRY RAND CORPORATION. July 26, 1960, No. 25902/60. Heading G3R In a system for automatically maintaining a desired height or depth and pitch attitude of a craft, signals corresponding to errors in both of these quantities combine to control both rear and forward control surfaces on the craft. In Fig. 1 the pitch angle of a submarine is maintained constant by a vertical gyroscope 16 adjusting a differential inductive device 11 the output of which is applied through a servomotor system 17 to control stern driving planes 26 and bow driving planes 29 through servomotor systems 20, 24 and 21, 27 respectively. The pitch angle may be trimmed level by operation of a hand wheel 14 which adjusts an element in differential inductive device 11 and is associated with a trim indicator (not shown). Stabilizing error rate signals from tachometer generators in a unit 19 driven by servomotor system 17, which are modified in dependence on craft speed by utilizing the output of the ship's log to control the generator fields, are applied to servomotor systems 20 and 21. The output of servomotor system 17 is also integrated by a motor unit 22 and applied to servomotor systems 20 and 21 to eliminate persistent effects. To prevent stern down effect during turns an adjustable rate of turn signal is developed by a servomotor system 23 from a compass signal and applied to servomotor systems 20 and 21. To maintain the submarine at such a depth that its snorkel tube is correctly positioned a mechanical differential gear 1, which is controlled through a servomotor system 5 from a hydrostatic pressuresensitive depth gauge 4 and by a hand wheel 2 for setting the required depth, drives a potentiometer 7, of adjustable sensitivity, the output of which controls differential inductive device 11 through a servomotor system. 8. An adjustable rate of change of depth signal developed by a tachometer generator 9 is also applied to servomotor system 8. To maintain a constant pressure within the submarine hull despite variations due for example, to spray on the snorkel, a mechanical differential gear 30, which is controlled through a servomotor system 35 from a hull air pressure gauge 33 and by a hand wheel 31 for setting the required pressure, drives a potentiometer 36, of adjustable sensitivity, the output of which also controls differential inductive device 11 through servomotor system 8 if a switch 37 is closed manually. The effect of signals from the depth gauge and the hull air pressure gauge is limited by adjustable limit stops 12 associated with the servomotor of system 8 which drives through a slipping clutch. If the depth error exceeds one predetermined value, a switch (not shown) operated by differential gear 1 prevents further operation of motor integrator 22, which, if a greater predetermined depth error is exceeded further switches, similarly operated, reset the integrator to zero.
Patent GB-1013275-A (GB)
Title: Frictionless suspension or centralising apparatus for sensitive instruments using position-varied electrostatic forces
IPC: F16C17/00
Filed: 1962-07-06
Abstract: 1,013,275. Automatic temperature control. SPERRY RAND CORPORATION. July 6, 1962 [July 10, 1961], No. 25983/62. Heading G3R. [Also in Division G1] A gyro rotor case or float 60 is enclosed in a housing 62 containing a flotation fluid 72 of high dielectric constant, the fluid acting as the primary source of suspension for the float, but the float is also positioned by electrostatic interaction between the float and cylindrical plates 63 and annular plates 65, 67. The temperatures of the flotation fluid and thus its density may be controlled to also control the position of the float 60 by sensing the voltage changes on the plates 63 as the float moves, these voltages being fed to a subtraction circuit, the output of which is compared to a reference voltage and fed to a device controlling heaters 76, 78 surrounding the housing 62.
Patent GB-662400-A (GB)
Title: Improvements in cyclopentanophenathrene derivatives and processes
IPC: C07J75/00
Filed: 1949-10-10
Abstract: 3-Enol thioethers of testosterone are obtained by reacting 3-enol thioethers of D 4-androstendione with lithium aluminium hydride under anhydrous conditions to form the lithium aluminium derivative of the 3-enol thioether of D 4-androstendione and hydrolysing the lithium aluminium derivative.  The 3-enol thioethers may be hydrolysed to testosterone with dilute mineral acids, cadmium carbonate or mercuric chloride or acylated to esters of 3-enol ethers of testosterone with an acyl halogenide. Detailed examples are given.  Specification 646,979 is referred to.
Patent GB-906433-A (GB)
Title: Cleaning and wringing apparatus for floor mops
Inventor: FOSS PETER ERNEST
IPC: A47L13/60
Filed: 1960-07-26
Abstract: 906,433. Mop-wringing apparatus. FLOOR CLEANING SERVICES Ltd. July 12, 1961 [July 26, 1960], No. 26007/60. Class 19. Cleaning and/or wringing apparatus for mops includes wringing-mechanism comprising a pair of wringing rollers 24 arranged so as to be movable towards and away from one another, a support 28 formed for the attachment of a mopback thereto and so disposed in relation to the rollers that when the rollers are separated by an appropriate distance and the mop-back is attached to the support the fringe of the mop will lie between the rollers, means by which the rollers can be moved away from one another and also moved towards one another to grip the fringe at a point adjacent the back (see Fig. 5), and means whereby the support 28 and the rollers 24 can be moved relatively to one another to draw the fringe between the rollers to expel liquid and collected material therefrom into a receptacle 10 disposed below the rollers. As shown, the apparatus comprises a rectangular tank 10 of moulded plastic fibreglass which is divided internally into compartments 13, 14, 15 by partitions 16, 17, the compartments intended to contain, respectively, detergent solution, rinsing water, and liquid and collected material expelled from the mop. Compartments 13, 14 are provided with a perforated squeezing trough 18 formed by a shelf 19 of fibreglass material extending across the compartments and spaced by a narrow gap 19<SP>1</SP> from the partitions. A number of perforations may be provided. Two tubular supports 21 lying on opposite sides of compartment 15 are secured to struts 20 and carry at their upper ends roller-supporting plates 22. The two rollers 24 are supported in slots 23 by their spindles 25, the ends of which extend through the slots 23 and are engaged by cam slots 26<SP>1</SP> in cam plates 26 pivoted to the upper ends of supports 21. The two cam-plates 26 are connected to a handle 27 so that by swinging the latter backwards and forwards the two cam-plates can be rocked simultaneously to move the rollers 24 towards and away from one another. The support 28, which is provided with a pair of hooks 31 arranged to engage lugs on the back of the mop is carried by vertical rods 29 slidable in supports 21 and is moved relatively to the rollers 24 by means of a foot lever 33 connected to the lower ends of the rods 29 and pivoted at 32. Each compartment has a drain hole communicating with a common outlet pipe or each is connected to a flexible outlet pipe releasably secured to the top of the container.
Patent GB-425909-A (GB)
Title: Improvements relating to apparatus for illustrating and determining the stresses in rod, beam and girder structures
IPC: G09B23/10
Filed: 1933-09-21
Abstract: 425,909. Educational appliances; toys. GEORGE, Ltd., W. & J., and BOUGH, F. P., 157, Great Charles Street, Birmingham. Sept. 21, 1933, No. 26039. [Classes 132 (iii) and 146 (ii)] Apparatus for building up models of rod, beam, and girder structures comprises a plurality of rods or bars 9, Fig. 1, and of yokes or ties 10, Fig. 2, each yoke &c. being formed as a substantially U-shaped member, the closed limb of which is provided with a boss 10a having therein a hole 10<b> adapted to receive a rod 9 and a transversely disposed tapped hole within which engages a screw 11, the nose whereof can be caused to impinge upon the periphery of the rod engaged within the hole for securing the rod to the yoke, the free ended limbs of the yoke being provided with holes 10<b> adapted to receive pivot pins 12 whereby a number of yokes of different widths may be hingedly connected together. The pivot pins 12 engage in tapped holes in a block 13, and the erected structure is suspended from a beam mounted in brackets carried by supporting legs. The bars of a model truss may be loaded as desired by springs and weights carried by the bars, and the device may include a spring balance to enable the stress in any bar to be determined. The spring balance may be incorporated in the unit shown in Fig. 7, which comprises a number of yokes 10 secured by pivot pins 12 to a common block 13, and having a bar 9 screwed to a rod 24 which moves in a sleeve 22 and carries an adjustable screw 25 against which abuts a collar 22a carried by the sleeve 22. A compression spring 23 is arranged between the collar 22<a> and the block 13 and the sleeve 22 carries a scale 22<b> to co-operate with the edge of the block 13.