baber/WOPTO huggingface dataset:
Patent GB-1100840-A (GB)
Title: Trigger countdown circuit
IPC: H03B19/00
Filed: 1966-01-24
Abstract: 1,100,840. Trigger circuits. TEKTRONIX Inc. 24 Jan., 1966 [29 Jan., 1965], No. 3052/66. Heading H3T. A trigger circuit which acts as a frequency divider comprises an output stage (monostable or bistable) which is triggered by one position of an input signal and a bistable circuit triggered by another portion of the input signal into a state which inhibits operation of the output stage, and a reverting circuit which resets the bistable circuit to its original state not earlier than the time when the output stage returns to its quiescent state, the reverting circuit also providing a signal to inhibit retriggering of the bistable circuit for a further period after this. In the arrangement of Fig. 2, the output stage is a monostable tunnel diode 24, the bistable circuit is a second tunnel diode 26 and the reverting circuit is a multivibrator 20 triggered to produce a triangular wave. An input signal at 12 is inverted by amplifier 10<SP>1</SP> and applied as a positive pulse to the two tunnel diodes which are in series opposition and are initially both in low-voltage states. This pulse triggers tunnel diode 26 to its high-voltage state, cuts off diode 42 and turns on diode 40 to connect the cathode of tunnel diode 24 to - 100V via resistor 24. The current through tunnel diode 24 is thus raised to just below the peak point so that it can be triggered by a negativegoing pulse, i.e. by a positive-going portion of the input signal at 12. When this happens, a negative step voltage appears at the cathode of tunnel diode 24, and this is differentiated by transformer 54 and capacitor 58 to produce an output pulse at 18. This pulse triggers the multivibrator 20 to give a negative ramp voltage 68 which causes the output stage 72 to deliver a pulse 74 when the ramp reaches its peak. This pulse 74 cuts off transistor 76 and interrupts the bias current of both tunnel diodes, returning them to their initial states; the monostable tunnel diode 24 has in fact already returned by the action of transistor 92 which produces a curved load line intersecting the tunnel diode curve just before the peak and valley points. When the ramp voltage 68 has returned to its initial level the pulse 74 ceases and transistor 76 is turned on again. Any input signals which appear at 12 before this happens will not trigger the tunnel diodes, and hence the circuit acts as a pulse frequency divider of ratio controlled by 22 which adjusts the slope of the ramp voltage 68 and hence the timing and width of the pulse 74. Since amplifier 10<SP>1</SP> supplies the bias current of tunnel diode 24, the triggering level of the latter is controlled by potentiometer 30. The potentiometer 82 similarly controls the bias current and triggering level of tunnel diode 26. The tunnel diode 24 may also be operated in a bistable mode (Fig. 1, not shown). The circuit may be used to trigger the timing unit of a sampling oscilloscope.
Patent GB-316564-A (GB)
Title: Improvements in compound asbestos-cement sheets and slabs
IPC: E04C2/24
Filed: 1928-01-31
Abstract: 316,564. Marks, E. C. R., (Ruyter, E.). Jan. 31, 1928. Compound slabs. - Compound sheets or slabs similar to those described in Specification 205,791 and applicable for walls, ceilings, table tops, switchboards, and other purposes consist of asbestoscement sheets m, Fig. 2, alternating with an equal number of sheets of wood or plywood o, the sheets being glued or cemented together. A single sheet of asbestoscement may be cemented to a single sheet of plywood. The compound sheets may be cemented with the asbestos-cement outwards to each side of a wooden framework n, which may project on one or more edges so that adjacent slabs may interlock. The internal cells of the framework may be filled with insulating material and there may be interposed within the compound slab one or more sheets C, Fig. 6, of metal, cork, pasteboard, pulp, ebonite, felt, linoleum, wire netting, or slabs of cement combined with kieselguhr and peat.
Patent GB-139573-A (GB)
Title: Improvements in or relating to artificial limbs
IPC: A61F2/60
Filed: 1919-02-07
Abstract: 139,573. Bulford, F. J. S. Feb. 7, 1919. Limbs, artificial.- A peg leg is provided with special means for supporting the stump of the amputated leg, and is fitted with coverings shaped to simulate a natural leg, and with an artificial foot. The invention is shown applied to legs amputated both above and below the knee, and suitable constructions of knee-joints and feet are described to illustrate the application of the invention. F o r amputations above the knee, the stump is laced tightly into a leather bucket k, Fig. 3, secured to an annular support a which is mounted on four bent arms f forming a cage, which arms are fixed at their lower ends to the peg 25 or to a fixed sleeve 13 thereon. To keep the limb in position on the stump, the front arm f is hooked at 37 to engage a leather tab 35, which in turn is connected to a chain 34 running over pulleys on a waistcoat round to a hook 40 on a tab attached to the bucket. Fig. 6 shows the manner in which the chain is arranged to form a loop or eve to engage the hook 40. The strap 42 forms an additional securing- means connecting the bucket and the waistcoat- The peg 25 is articulated at 24 to form a kneejoint, and is connected to an artificial foot having rubber treads p, q, a pivoted toe portion separated from the main portion by rubber blocks n, and a stop for limiting the swing of the foot in both directions. The stop comprises a bifurcated link r pivoted to the peg and also to a double-acting spring plunger mounted in a metal-lined slot in the foot. When the knee-joint is bent, a chain 19 fixed to the sleeve 13 moves a sliding sleeve 18 axially on the peg against the action of a restoring spring (not shown), which is fitted between the sleeve and the cross-rod 12. The metal strap y, forming one of the supports for the casing of the leg, is bent inwards at 26 to form a knee-cap, which is engaged slidably bv the fitting 27 on the upper strap 29. In a modified construction for amputations below the knee, the bucket and cage forming the stump support are fitted below the knee-joint articulations in the metal side straps, and an additional leather sleeve is laced round the thigh.
Patent GB-963896-A (GB)
Title: Improvements in or relating to protective devices for electric motors
IPC: H02K11/25
Filed: 1961-01-26
Abstract: 963,896. Protective arrangements; switch cases; control of A.C. motors; protective devices for dynamo-electric machines. M. CLAUSEN, [trading as DANFOSS VED ING. M. CLAUSEN]. Jan. 26, 1961 [Jan. 27, 1960], No. 3106/61. Headings H2A, H2B, H2J and H2K. A switch arrangement for controlling the drive motor of a compressor-type refrigerator, comprises a starting relay 3, Fig. 3, and a thermally sensitive device 7 arranged in an openended housing 2, the device 7 being resiliently mounted so that it is maintained in a good heat-conducting relationship against the compressor casing 1 when the housing 2 is mounted on the casing 1. The resilient mounting may be provided by a spring 6 secured at one end to the housing 2 and at the other end partly surrounding the device 7 and abutting a flange 8 on the device 7. The device 7 may comprise a snap-acting bimetallic switch 16, Fig. 2, and a heater 17 connected in series with the motor windings 12, 13, the switch responding to excess current in the motor windings and to excess temperature of the motor-compressor. The relay 3 has its coil 14 in series with the running winding 12 of the motor and its contacts 15, 19, 20 in series with the starting winding 13.
Patent GB-489765-A (GB)
Title: Improvements in or relating to tool racks and like shelving
IPC: A47B57/20
Filed: 1937-02-03
Abstract: 489,765. Tool &c. racks. BROOKHIRST SWITCHGEAR, Ltd., and COLLINGS, S. H. Feb. 3, 1937, No. 3141. [Class 52 (i)] A rack comprises a number of uprights 20 of tubular or channel section each provided on two opposite sides with a row of keyhole slots 30 the uprights being spaced apart and the slots receiving the reduced ends of shelf or article supporting bars 31 extending between them. One upright may thus support two sets of bars, allowing of lateral extension. The uprights are closed at their ends by blocks 23 provided with sockets for dowel pins whereby one rack may be superimposed on another, and transverse members 21, 22 may be fixed to these blocks. The shelves 36 have ledges 37 which embrace the bars 31.
Patent GB-120501-A (GB)
Title: Improvements in Apparatus for Dehydrating.
Inventor: MANGELSDORFF MAX FRED
IPC: F26B11/04
Filed: 1918-02-21
Abstract: 120,501. Mangelsdorff, M. F. Feb. 21, 1918. Continuous - discharge apparatus, rotary. - Vegetable and other material reduced to small pieces is dried in a rotary cylinder provided with longitudinal lifting-blades and transverse peripheral partitions. Material is introduced at 18 into the inclined cylinder 10 turning on rollers 17 and provided with a flange 19 engaging a roller 20 to prevent longitudinal movement. Blades 21 pick up the material and deliver' it between central perforated blades 24 and disks 23 moving with the cylinder, which in turn deliver it to the bottom of the cylinder. The blades 24 are connected to the blades 21 by arms 25. The cylinder is fitted with a stationary head 12 mounted on wheels 13 and provided with a nozzle 26 open below through which hot gases are forced by a fan, and take the course indicated by the arrows. The blades 24 may be perforated, or the disks 23 may carry a gauze cylinder, as shown in Fig. 1. The material is discharged through a suitable valve 31, and is received by a conveyer 32. As shown in Fig. 4, the cylinder is driven by an endless band 14 passing round a pulley 15. The condition of the air may be controlled by a humidostat and a thermostat.
Patent GB-874175-A (GB)
Title: Circuit for thermal compensation of transistors
IPC: H03F1/30
Filed: 1958-01-30
Abstract: 874,175. Stabilizing transmitter circuits. ADVANCED RESEARCH ASSOCIATES Inc. Jan. 30, 1958 [Dec. 31, 1957], No. 3181/58. Drawings to Specification. Class 40(6) The effect of changes with temperature of leakage current through the collector-base junction of a transistor is reduced by connecting one or more semi-conductor diodes between the emitter and base electrodes, the diodes being poled so as to conduct in the current in the reverse direction. The diodes also serve to limit the positive excursion of the base electrode with respect to the emitter.
Patent GB-536125-A (GB)
Title: Improvements in or relating to sliding shutters for buildings
IPC: E04D13/03
Filed: 1940-02-21
Abstract: 536,125. Window shutters. MELLOWES, H. A., and MELLOWES & CO., Ltd. Feb. 21, 1940, No. 3245. [Class 20 (iii)] A sliding shutter has upper and lower track rods or bars 14, 13 engaging rollers 29, 22 on the window frame. The shutter may have open or transparent sections alternating with opaque sections 12, preferably of corrugated metal. The window has correspondingly spaced transparent and opaque sections, the glazing in the window being exposed or obturated according to the position of the shutter. The lower cylindrical track rods shown may be replaced by an L-iron the arms of which engage rollers mounted at right angles to one another.
Patent GB-287679-A (GB)
Title: Improvements in conduits for laying electric cables
IPC: H02G9/06
Filed: 1927-02-05
Abstract: 287,679. Beaver, C. J., and Glover & Co., Ltd., W. T. Feb. 5, 1927. conduits and casings. - Troughing for high tension electric cables is made by pouring in a quantity of molten asphalt or bituminous material b into the bottom of a former which may comprise the bottom of a trench and upstanding wooden boards a, Fig. 2, or may consist of a sheet metal channel a', Fig. 5. A length of wire netting c, expanded metal or interlaced rods, bent into channel form is bedded on the asphalt b, and bridge pieces d, d' put in place with the cables e, e', e<2>. The upper edges of the netting are then drawn together and connected, as by clips or hooks c<3> and the molten asphalt etc. is poured in to embed completely the cables and netting. The former may be removed, or, if made of metal left in position. The spacing pieces may be in the form of soft metal blocks or of springy or soft metal slips.
Patent GB-566692-A (GB)
Title: Improvements in or relating to fuel injection apparatus for internal-combustion engines
IPC: F02M47/04
Filed: 1943-03-02
Abstract: 566,692. Injection devices. AMERY, M. [Representative of AMERY, G.], and AMERY HOLDINGS, Ltd. March 2, 1943, No. 3410. [Class 7 (iii)] In an injection nozzle, fuel is supplied by a continuously operating pump to an inlet 30 and traverses a passage 36 in an expansion plunger 35, an expansion chamber 34, and passages 33, 28, 27 and 26 to a nozzle 13 normally closed by valve 19 subject to the pressure of a piston 17, of which the upper face forms one wall of a control chamber 21 containing fluid kept at injection pressure except at injection periods when a distributer relieves the pressure and permits the fuel pressure to raise the valve 19 ; simultaneously the reduced pressure in the control chamber 21 permits a second piston 16 to move inwards under pressure of the fuel in the passage 36, the fuel operating against an obturator 38 normally supported by the piston 16 to close the passage 36. On reapplication of pressure to the control chamber 21, the pistons 16, 17 move outwards, closing the valve 19 and blocking the passage 36, whereupon the pressure of the fuel trapped between the obturator 38 and the valve 19 raises the expansion plunger 35, the diameters of the plunger and the piston 16 being equal to make their pressures balance.' The obturator rises with the plunger, movement of which enlarges the expansion chamber 34 until the pressure of the trapped fuel drops to that of the atmosphere and any tendency to dribble from the nozzle is avoided. Specifications 546,598, 556,140 and 566,693 are referred to.
Patent GB-547887-A (GB)
Title: Improvements in or relating to the production of fabrics of a voluminous character
IPC: D02G1/18
Filed: 1941-03-13
Abstract: 547,887. Artificial silk etc.; treating textiles with liquids &c. BELL, A. S., and ANGUS, W. C. March 13, 1941, No. 3415. [Classes 2 (ii) and 15 (ii)] Fabrics of full or voluminous character are obtained by spinning together into a yarn two varieties of staple fibre, one of which is made from filaments of highly polymeric esters or ethers and the other from cellulose filaments, forming the yarns into a fabric, and treating the fabric with an organic shrinking agent for the first variety of staple fibre. The other variety remains substantially unaffected and is thus forced to the surface of the fabric. The first variety of staple fibre may be of cellulose acetate, formate, propionate, or butyrate, or of ethyl, methyl, or benzyl cellulose, or of a polyvinyl compound such as a copolymer of vinyl chloride and vinyl acetate. The other variety of staple fibre may be of regenerated cellulose from viscose or cuprammonium cellulose solution, or of saponified cellulose acetate or other cellulose ester. The fabric may be woven with both warp and weft of yarn spun from a mixture of cellulose acetate and viscose staple fibres. The fabric may be immersed in an aqueous solution of acetic acid or ammonium thiocyanate of such strength that only the cellulose acetate fibres are shrunk. Other shrinking media which may be used are methyl propionate and propylene chloride ; mixtures of methylene or ethylene chloride or a lower alkyl formate with kerosene, benzene, toluene, or carbon tetrachloride ; mixtures of methyl acetate. or trichlorethylene with methyl or ethyl alcohol; aqueous acetone. After the shrinking treatment, the fabric may be given a slight saponification treatment. The fabric may be dyed differentially or in solid colours. In an example, a yarn spun from cellulose acetate and viscose fibres is woven into a fabric. The fabric is scoured with hot soap solution, washed, and dried. It is then immersed in acetic acid solution, washed, and dried.
Patent GB-226395-A (GB)
Title: Improvements in or relating to exercising apparatus
IPC: A63B21/055
Filed: 1924-02-09
Abstract: 226,395. Wareham, H. J. Feb. 9, 1924. Hooks, closed.-A terminal hook for exercising-apparatus comprises a wire bent into the form of a spiral tube 16 round the end of the elastic cord, the two ends being placed one beside the other, with one end 17 out-turned. A hook 7 for connecting the cords together is formed with its ends arranged in a similar manner. Specification 28760/12, [Class 132 (i), Amusement and exercising apparatus &c.], is referred to.
Patent GB-377116-A (GB)
Title: Improvements in or relating to devices for obtaining radio reception free from interference
IPC: H04B1/12
Filed: 1932-02-06
Abstract: 377,116. Wireless receiving systems. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABBIEKEN, 13D, Emmasingel, Eindhoven, Holland. Feb. 6, 1932, No. 3586. Convention date, April 25, 1931. Addition to 376,670. [Class 40 (v).] A system for cutting out local interference by the use of two aerials of different lengths, as described in the parent Specification, is characterized by the provision of a tuning condenser across each of the aerial coupling coils. Or as shown in the Figure both aerial coils 4, 5 may be shunted by a common tuning condenser 18, which also serves to adjust the effective earthing point of the aerial system in order to ensure a complete balancing-out of the local interference. Small series condensers 19, 20 are inserted to decouple the aerial capacity and so ensure constant tuning in the receiving set 3. The coils are housed in an earthed screening box 9, and undesired capacity coupling is prevented by a screen 10.
Patent GB-469774-A (GB)
Title: Improvements in variable pitch airscrews
IPC: B64C11/06
Filed: 1936-02-06
Abstract: 469,774. Airscrews. ELLIOTT, A. G., and BARRINGTON, T. B. Feb. 6, 1936, No. 3627. [Class 114] The thrust race is secured to the sleave of a blade of a variable pitch propeller by a nut or other similar device attached by square or buttress threads. The blade A has a sleeve B encircling its root and this is provided with a square thread F <1> to which is threaded the nut F acting as the holder for one race D of a thrust bearing, the other member D<2> of which is supported against a screwed sleeve D<4>. This other member D<2> in turn forms a race for a second ball bearing E, the outer race E<1> of which is held by spring washers E<2>, E3 within the same securing ring D4. The bottom of the sleeve B is serrated and adapted to engage similar serrations on a ring H carrying an eccentric pin H<3> for the blade adjusting gear. This ring H is held by another ring G screwed to the main ring F. In place of the square thread, a buttress thread may be employed, and if a Whitworth thread is used on the sleeve then the thread for securing the ring G is formed of buttress or square section.
Patent GB-540014-A (GB)
Title: Television scanning-wave generator synchronizing systems
IPC: H04N5/08
Filed: 1940-02-27
Abstract: 540,014. Television. HAZELTINE CORPORATION. Feb. 27, 1940, No. 3639. Convention date, March 20, 1939. [Class 40 (iii)] Frame pulses are separated from line pulses in a television train of synchronizing pulses, for example such as shown at A in Fig. 4, by delaying and reversing the polarity of these signals as shown at B, then mixing the delayed and reversed signals with the original signals, so that line pulses are cancelled out and frame pulses F are left as shown at C. The delay may be produced by network 22, Fig. 1, following an amplifying valve 21, and the reversal by a valve 23, the output of which is mixed with the original signal from an amplifying valve 20. In another arrangement a single amplifying valve is used, and the signals are delayed, reversed and mixed by a reflecting network. The field frequency generator 18 may be as described in Specification 530,227.
Patent GB-633255-A (GB)
Title: Improvements in or relating to apparatus for distributing and spreading manure and other fertilisers on the ground
IPC: A01C3/06
Filed: 1948-02-09
Abstract: 633,255. Manure distributers. CLARKE, C. J., and BROOME, J. H. Feb. 9,1948, Nos. 3713, 3714, 3715, 3716 and 20902. [Class 6(i)] A manure distributer comprises a wheeled trailer 1 housing an upwardly and rearwardly inclined conveyer 5, feeding manure to comminuting devices 8, 10, from which it falls on to the surface of an inclined vaned disc 6. The conveyer may be an endless band (as shown) or a worm. The comminuting devices comprise discs 8 on a shaft 9 and multibladed knives 10 on a shaft 11. Alternatively, a reciprocating cutter may be used. When a worm conveyer is employed, the cutter may comprise a rotary knife on the worm shaft cooperating with fixed or oppositely-rotating knives on the tube in which the worm rotates. The discs 8 and conveyer 5 are driven from the land-wheel axle 13 through a clutch (Fig. 2, not shown) and a gear-box 16. The knives 10 and spreading disc 6 are also driven from the axle, through chains 23, 33. By means of the gear-box 16 the relative speeds of the disc 6 and conveyer 5 may be varied. In modifications, the disc 6 may be stationary and only the vanes rotatable, and the disc may be of variable inclination and include a free wheel to permit overrunning. All the mechanisms may be driven from a power take-off.
Patent GB-928406-A (GB)
Title: Improvements in invalid cushions
IPC: A61G7/02
Filed: 1961-01-31
Abstract: 928,406. Cushions combined with sanitary conveniences. M. A. RUSKIN. Jan. 30, 1962 [Jan. 31, 1961], No. 3720/61. Class 52 (2). A sanitary convenience 6 is placed in a tapered slot in a foam rubber or plastic cushion having a waterproof cover and a firm rubber base 2. The overhanging sides 3 of the slot are stiffened to prevent them from bearing down on the convenience under the weight of the person sitting on the cushion.
Patent GB-1516223-A (GB)
Title: Process for preparing laked azo dyestuffs
IPC: C09D11/02
Filed: 1976-01-30
Abstract: 1516223 Laked azo dyestuffs HOECHST AG 30 Jan 1976 [30 Jan 1975] 03760/76 Heading C4P A laked azo compound is prepared by reacting a diazotizable amine (aromatic or heteroaromatic) with the stoichiometric amount of a nitrite and of a coupling component at - 10‹ to + 80‹C in water in the absence of added acid, at least one of the reaction components containing at least one free acid group capable of lake formation and subsequently laking any free acid group remaining in the product. As long as there is at least one free acid group, other acid groups may be laked before or during the coupling. The nitrite may be an alkali metal nitrite or the nitrite of a metal which is capable of forming lakes e.g. Ba, Mn, Ca or Sr. A buffer substance may be present in the coupling mixture, or a base to adjust the pH to a suitable value. A minor proportion of a water-miscible organic solvent may also be present, and a surface active agent may be added. The laked azo compound may be used to colour a plastic material e.g. PVC or a printing paste for use in graphic printing.