baber/WOPTO huggingface dataset:
Patent GB-624662-A (GB)
Title: Improvements in or relating to high frequency communication systems
IPC: H03D9/04
Filed: 1947-01-28
Abstract: 624,662. Frequency modulation. WESTING- HOUSE ELECTRIC INTERNATIONAL CO. Jan. 28, 1947, No. 2624. Convention date, July 7, 1944. [Class 40 (v)] In a high-frequency communication system of the kind in which the signal is amplitudemodulated on a subcarrier wave which is then used to frequencymodulate the carrier wave, the amplitude-modulated sub-carrier is recovered at the receiver by a discriminator involving balanced rectifiers within a waveguide, and is fed to an ordinary radio receiver. Fig. 3 shows a form of the discriminator, in which the received F.M. carrier is fed to a wave-guide 11 with two opposed rectifiers 16, 17 connected across it. The end of the guide communicates by an opening. in a partition 15 with a cavity 14 resonant with the carrier. A loop 19 picks up wave energy from the cavity and feeds it to the junction of the rectifiers, the lead 18 being of such a length that at the mean frequency the wave is in quadrature with that traversing the rectifiers, and there is no voltage across the load resistors 22, 23. As the frequency deviates, voltages appear across 22, 23 representing the amplitude-modulated sub-carrier, and are fed via the terminals A, B to an ordinary receiver tuned to the subcarrier. The high-frequency circuits through the rectifiers are completed by the guide wall and by capacities present where the leads from the rectifier 17 and the loop 19 pass through the wall. In a modification, the rectifiers are placed a half-wave apart along the guide, and pick-up from the resonant cavity is by a probe connected to a coaxial line which is branched to feed the wave energy to the respective rectifiers (Fig. 4, not shown).
Patent GB-1075311-A (GB)
Title: Improvements in flue systems for closed heating appliances
Inventor: PERRY DONALD GARTH
IPC: F24C15/00
Filed: 1965-01-21
Abstract: 1,075,311. Chimneys. GAS COUNCIL. Jan. 20, 1966 [Jan. 21, 1965], No. 2769/65. Heading F4J. To ensure that each of a plurality of heating appliances, which are connected at different levels to the same upwardly extending chimneylike duct 1, is run as efficiently as possible, the open end 6 of the outlet duct 4 of such an appliance is chamfered and made to project into the upwardly extending duct 1 with the inlet duct 3, used for supplying combustion air, having its open end 5 flush with the inside surface of said duct. The amount of projection and chamfer of duct 4 is determined by the nature and relative positions of the appliance 2 and duct 1. Such an arrangement prevents a fall in pressure in the outlet duct, caused by the flow past it, thereby ensuring that the whole air flow through the appliance is brought about by the draught caused by the appliance itself.
Patent GB-630274-A (GB)
Title: Improvements in or relating to electric time switches or clock controlled mechanical devices
IPC: G04F3/08
Filed: 1947-01-29
Abstract: 630,274. Time switches. ABRAM; G. H. Jan. 29, 1947, No. 2776. [Class 38(v)] The desired time interval,"at the-end of which switch is' to be operated, is set in relation to dials 16, 17 by manual rotation in one direction of a control spindle 4 which is then driven on in the same direction by a clock motor 20 back to the zero position where the switch is operated. The setting shaft 10 rotates a spindle 13 having a pinion 14 engaging a gear 15 on the spindle 4, and pointers 19 on the spindles 4, 13 indicate the time interval on dials 16, 17 calibrated in hours and minutes respectively. A spring 29 secured to the spindle 13 and frame 30 takes up back lash. A gear 5 on the spindle 4 has a peripheral gap 9 and meshes with a pinion 6 frictionally driven from a spindle 3 by a clutch 8, the spindle 3 being rotated by the motor 20 through a worm wheel 28 and having an extension 7 forming the minute hand arbor. After setting in a counter-clockwise direction as viewed in Fig. 1, the spindle 4 is first rotated in the same direction by the motor and then stops when the gap 9 is adjacent the pinion 6. A cam 31 on the spindle 4 has a step 33 off which a spring-loaded plunger 32 falls to operate a switch 34 when the pointers 19 have returned to their zero position. Alternatively the stopping of the spindle 4 may occur after the switch has operated. In an alternative construction. Fig. 5, the spindle 4 has an arm 36 carrying a planetary pinion 37 engaging a fixed gear wheel 37a, and an arm 37b on the pinion 37 carries a cam 37c, the arrangement being such. that as the pinion rotates around the wheel 37a, the' arm 37b flicks over to give a quick action-of the cam 37c on the contacts 39. In Fig. 7, contacts 39 are operated with a quick-action when a spring-loaded cam 43 slidable in an arm 43a rotated by the spindle 4 disengages a fixed stop 42. In Fig. 9, (not shown), a lever carried by the spindle 4 has pivoted to it a spring-urged extension similarly co-operating with a stop.
Patent GB-162747-A (GB)
Title: Improvements relating to the manufacture of arsenical compounds
IPC: C01G28/00
Filed: 1920-01-29
Abstract: Salts of thioarsenic acids, possessing the general formul  RAsO3-xSx and R3AsO4-xSx (in which R represents an organic ammonium radicle), are prepared by passing sulphuretted hydrogen into a solution of an arsenate, or by treating arsenious oxide or arsenic trisulphide with an alkali polysulphide, or by treating arsenic pentasulphide with an alkali monosulphide, followed by double decomposition with the salt of an organic base, such as methylamine or ethylamine.ALSO:Ammonium salts of thioarsenic acids possessing the general formul  NH4AsO3-xSx and (NH4)3AsO4-xSx are prepared by passing sulphuretted hydrogen into a solution of ammonium arsenate, or by treating arsenious oxide or arsenic trisulphide with ammonium polysulphide, or by treating arsenic pentasulphide with ammonium monosulphide.ALSO:Salts of thioarsenic acids, possessing the general formul  RAsO3-xSx and R3AsO4-xSx (in which R represents an alkali metal, ammonium, or an organic ammonium vehicle), are prepared by passing sulphuretted hydrogen into a solution of an arsenate, or by treating arsenious oxide or arsenic trisulphide with an alkali or ammonium polysulphide, or by treating arsenic pentasulphide with an alkali or ammonium monosulphide, followed by double decomposition in the case of the organic compounds. Examples are given of the preparation Na3AsO3S.12H3O, Na3AsO2S2.10H2O, Na3AsO2S2.10H2O, Na3AsS4.8H2O, NaAsS3, and of the analogous salts of methylamine and ethylamine. The substances are of use for the destruction of parasites externally.
Patent GB-620897-A (GB)
Title: Improvements in or relating to substation telephone sets
IPC: H04M1/58
Filed: 1947-01-30
Abstract: 620,897. Substation equipment; anti-sidetone circuits. KELLOGG SWITCHBOARD & SUPPLY CO. Jan. 30, 1947, No. 2876. Convention date, July 13, 1945. [Class 40 (iv)] In a telephone set for anti-side-tone working over common battery circuits, terminals 34, 35, 36 are provided to enable an impedance 78 to be included in or excluded from the circuit according to the length of line to which the set is connected. For long lines the impedance 78 is included in the line balance 62, 76 over induction coil winding 75 to augment the effect of the resistance 76, terminals 34, 35 being connected by a link 19 (Fig. 2). For short lines the link connects terminals 34, 36 (Fig. 4) so that the impedance 78 is in series with the line L1, L2 and induction coil winding 74, and thus serves to limit the flow of direct current through the transmitter in addition to maintaining balanced operation. For lines of medium length the link 19 is positioned to connect all three terminals and short circuit the impedance 78 (Fig. 3).
Patent GB-104367-A (GB)
Title: Improvements in or relating to Apparatus for the Concentration of Ores.
IPC: B03D1/14
Filed: 1916-02-26
Abstract: 104,367. Minerals Separation, Ltd., (Lyster, F. J.). Feb. 26, 1916. Surface-tension separating apparatus.-Apparatus for carrying out the froth-flotation process comprises a separating-vessel A having mounted therein, preferably adjustably, one or more bottomless vessels E into which, and preferably below the surface of the liquid therein, pulp is admitted from a feed-box H through pipes K provided with openings L through which air is drawn by the flow of the pulp. The vessels E are provided with baffles M and with overflow launders G through which the froth is removed, and the vessel A has an overflow D and an adjustable outlet B at the bottom through which the residues may pass to the feed-box of the succeeding separating-vessel of a series. Specifications 7803/05, 2359/09, 21857/10, and 10666/15 are referred to.
Patent GB-1459443-A (GB)
Title: Liquid level detecting devices
IPC: G01F23/16
Filed: 1973-01-19
Abstract: 1459443 Liquid level indication ABTEC Ltd 2 Jan 1974 [19 Jan 1973] 2903/73 Headings  G1H and G1N In a vapour generator liquid level control device in which a stack tube 10 is connected at the lower end 23 and at the upper end 24 to the liquid and vapour sections respectively of a steam generator 11, at least one cooling tube 16 is connected at 17 and 18 with the stack tube 10. The arrangement is such that the altering of the water level 14 in the steam generator 11 will cause alteration of the vapour and steam condensate in vertical portions 20, 21, 22 of the tube 16 to effect expansion of portions 41, 40 of the tube 16 thus pivoting levers 25, 30 about pivots 28, 32 to open or close an electrical switch 33 actuating an electric circuit in combination with a visual or acoustic using device and a control circuit for the boilers. The pivots may be on different portions 20, 21 of the cooling tube 16 or one of the sets of pivots may be on stack tube 10. The arms 25, 30 may be replaced by coils subject to heat induced electrical resistance charges wound around the stack tube 10, and portions 20, 21 of tube 16, Figs. 9-12 (not shown). In an alternative embodiment Figs. 13, 14, 15, the upper and lower tubes 130, 150 from the steam generator are inclined and have a plurality of cooling tubes 136-141 for monitoring at various levels. The tube 150 may be in the form of a manifold having a rotatable inner sleeve 151 so arranged as to effect blowing down of individual tubes to clear them of debris &c. or place all of them in operation at once. In another arrangement, Figs. 16, 17 (not shown), cooling tubes may extend radially from a vertical stack tube 13. The device may also be provided with a switch, Figs. 20-23 (not shown) which senses when the stack tube 10 reaches an elevated temperature and activates an alarm circuit. Lamps are also provided to indicate that the switch contacts are live and the apparatus is in the normal state.
Patent GB-634362-A (GB)
Title: Improvements in and relating to fluid valve constructions
IPC: F16N23/00
Filed: 1945-02-06
Abstract: 634,362. Fluid-actuated valves. BRITISH THOMSON-HOUSTON CO., Ltd. Feb. 6, 1945, No. 2963. Convention date, Feb. 8, 1944. [Class 135] [Also in Groups XXVIII and XXXIV] A valve device for preventing leakage of liquid from an elevated supply tank to a consuming device when no liquid is needed or the supply pump fails comprises two separate spring-biassed valves arranged respectively in the supply and return conduits between the tank and the consuming device and mechanically connected so that the opening of one of the valves opens the other. As shown, the device 18 comprises a spring-closed check valve 30 arranged in a supply conduit 13 between a tank 10 and a lubricating or other supply pump 12 leading to a consumer 11 such as a bearing or gearing of an aircraft turbosupercharger. The second valve comprises a spring-closed check valve 32 in the return line 17 between the consumer 11 and the tank 10, a scavenging pump 15 being arranged between the consumer 11 and the device 18. The valve 32 has a hollow stem 35 in which slides the stem 34 of the valve 30, axial clearance 37 being provided between the valve stems so that the valve 32 leaves its seat 27 first. The valve 32 is of piston form so that the valve 30 is fully open before the port leading back to the top of the tank 10 is uncovered by the piston 32. The casing of the device 18 is made in three parts 19, 20, 21 secured together by bolts 22, 23. U.S.A. Specification 2,312,063 is referred to.
Patent GB-1125863-A (GB)
Title: A method of producing and protecting deposits of sedimentary material on floors of bodies of water
IPC: E02B3/04
Filed: 1968-04-29
Abstract: 1,125,863. Erosion preventing. O. J. F. LARSEN. 29 April, 1968, No. 3023/66. Heading E1H. In order to produce deposits of sedimentary material 6, Fig. 2 on the floor of a body of water structural elements are placed thereon, each element in the form of a shell containing channels 1 which lead an upward flow from the area 3 underneath the elements to the downstream or lee side of the element with respect to the direction of the natural current 7. The element is supported by legs 8 mounted on a ring 10 parallel to the periphery of the element. The elements may be raised on top of the material which is gradually deposited underneath them by vibrating or by rolling. They may be sinusoid or paraboloid formed or plane, the channels 1 having rounded mouths and being at right angles to the surface. The top side of the elements may be equipped with strainers which allow for passage of the water but not of the coarse part of the sedimentary materials.
Patent GB-479390-A (GB)
Title: Improvements in and relating to separators for electric accumulators and the like
IPC: H01M50/414
Filed: 1937-02-02
Abstract: A porous separator for electric batteries is made by mixing an p emulsion of a binder in the discontinuous phase with a finely divided inert filler, partly drying and then pressing the mixture and setting or vulcanizing the binder.  A final drying removes the remainder of the continuous phase of the emulsion.  Protective colloids may be added to the mixture such as ammonium linoleate, saponified castor oil and sodium silicate, and also fibrous material such as cotton, asbestos and spun glass.  In an example rubber latex is mixed with water sulphur and diatomaceous earth to form a paste which is partly dried and then moulded by rolling or hydraulic pressure to form sheets which are then vulcanized and dried.  Instead of rubber latex an emulsified condensation product may be used such as that known under the Registered Trade Mark "Bakelite," the sulphur being omitted from the mixture. Alternatively both rubber and synthetic resin may be used together.  In other examples emulsions of pitch, asphalt, resinous, waxy or bituminous substances are used with bentonite as a protective colloid.  A mixture of cumarone resin and asphaltic oil residue is given as one example.  In two other examples emulsions of sodium silicate solution and toluene or castor oil, and emulsions of pyroxylin are used.  Fillers other than diatomaceous earth may be employed such as mica, kaolin and asbestos.  Instead of working up the product in the form of sheets for use as separators it may be applied to a fibrous support or to a wire netting or directly on to the electrodes.  Tubular separators may be formed by extruding the material with soap.  The finished product may also be used as a support for the active material in storage batteries.  Specification 377,257 is referred to.
Patent GB-553397-A (GB)
Title: Improvements in and in the manufacture of valve and similar guides
IPC: C22C33/02
Filed: 1942-03-09
Abstract: 553,397. Iron alloys. BRITISH PISTON RING CO., Ltd., TWIGGER, T. R., and JUDD, J. A. March 9, 1942, No. 3035. [Class 82 (i)] [Also in Group XXII] Valve and similar guides are produced by pressing and sintering operations from highly alloyed iron of such composition that the structure is austenitic and has a co-efficient of expansion exceding 0.000016 per degree C. The composition of the powder is such that the percentage of total carbon is from 0 to 5, silicon 0 to 5, nickel 8 to 25. chromium 0 to 5, copper 0 to 10, manganese 0 to 10, molybdenum 0 to 5 and the remainder iron. Vanadium, titanium, tungsten, aluminium or cobalt up to 5 per cent. each may be added. The powder is consolidated in a die and the compact produced is sintered at 1100‹C., repressed as closely as possible to finished dimensions, and may be finished by normalising and machining. To ensure full austenitic structure the guides may be quenched from about 500‹C. and the outer layers may be carbonized or nitrogen hardened, and the guides may be impregnated with oil.
Patent GB-945200-A (GB)
Title: Improved voltage control device
IPC: H02J7/14
Filed: 1962-01-26
Abstract: 945,200. Protective arrangements. PROJECTEURS CIBIE. Jan. 26, 1962 [March 9, 1961], No. 3076/62. Heading H2H. A system for protecting a load connected to a line U 1  from excess voltage comprises semiconductor diodes D 1 , D 2  connected in series with the load circuit, these diodes being short circuited by the normally closed contacts p of a relay P when the voltage of the supply line L has a normal value, the relay P, under the control of a further relay R, causing the contacts p to open when the voltage of the supply line L exceeds a given limit, whereby the excess voltage is absorbed by the diodes D 1 , D 2 . In a further embodiment the voltage reduction may be effected in more than one step in succession. At low load currents the relay P may be arranged to switch in an auxiliary load thereby to render the diode volt drop effective.
Patent GB-1376128-A (GB)
Title: Systems for monitoring mains electrical power supplies
IPC: H04H1/00
Filed: 1971-01-25
Abstract: 1376128 Recording use of receivers; demodulators PLESSEY CO Ltd 21 Jan 1972 [25 Jan 1971] 3106/71 Headings H3Q and H3F In a system responsive to the operation of a plurality of mains powered electrical appliances each of whose operation is controlled by received electrical information signals, detecting means 24 is operative to detect the overall pattern of load variations imposed on the mains supply by the appliances in response to variations in the received information signals, reference means 32 is operative to generate a reference signal representing the pattern of load variations imposed on the mains supply by particular ones of the appliances in response to the signal variations and correlating means 44, 64, 48 is connected to receive the detected and reference signals and to correlate them so as to produce a correlated output. The load variations imposed on the mains supply 14 by television connected to mains supply 20 are detected by signal channel 24. The mains frequency is demodulated at 26 and the load variations are passed via a band pass filter 28 to a multiplier 30 where they are mixed at 30 with load variations obtained from a reference television receiver 32 tuned to a particular programme. The multiplier 30 accentuates the load variations in the signal X 1 (t) due to the consumers television receivers tuned to the same programme as reference television receivers 32 and 51 and attenuates load variations due to other factors. A multiplier 60 mixes the signals derived from the mains supplies of the reference televisions 32, 51 so that the multiplying factor X 2 (t) from the receiver 32 is not present in the output signed from a divider 48. A gate 41 is amplitude sensitive and restricts the correlation process to periods when large signals are present. A scaling device 52 enables the signals in the two channels 24 and 50 to be made approximately equal and the output at 70 must be multiplied by the scale factor of device 52 to produce the required indication of the number of receivers on the selected mains phase 14 which are tuned to the same programme as the calibrated receivers 32 and 51. The number of television receivers tuned to the same programme and connected to the other two phases 10 and 12 of the mains supply can be determined by switch 22. The system may be calibrated by switching switch 22 to terminal 72 so that both channels 24 and 50 then receive the same input and can be adjusted until their outputs are equal. The receiver 51 may be omitted by feeding the input of the sealing device 52 from the receiver 32. The signals received from the lines 10, 12 or 14 can be recorded and then correlated with the reference signals later. The received signal can be correlated with the light emitted by the tuned reference receivers or with the broadcast video signal from the transmitter that is indirectly instead of directly with the pattern of load variations imposed by the reference receivers.
Patent GB-907245-A (GB)
Title: Improvements in and relating to change-speed planetary gearing
IPC: B23Q5/14
Filed: 1959-01-28
Abstract: 907,245. Change-speed gear. ZAHNRADFABRIK FRIEDRICHSHAFEN A.G. Jan. 28, 1959 [Feb. 6, 1958], No. 3135/59. Class 80 (2). A planetary change-speed gear for machine tools has a casing fast with an electric motor, the casing having external cooling fins in line with cooling fins on the motor housing and oil lubricating the gears &c. running down the casing back to a sump. As shown, an electric motor drive shaft 1 is fast with an input gear shaft 2 mounted in a gear-case 5 which is secured to the electric motor housing to make an integral unit therewith, planetary gearing I-III comprising both sun-planet-ring gear trains and a sun, stepped-planets, sun gear train arranged in series within the gear-case providing direct drive and step-down ratios to an output shaft 3. The first two trains I, II have clutch and disc brakes each provided with a single armature A 1  selectively engaged with electromagnets B 1 , K 1 . The third train III has a double armature A 3 , A 4  so that by simultaneous energization of clutch and brake electromagnets K 3 , B 3 , the output shaft 3 can be held stationary. A bi-directional pump 7 draws oil from the gear sump 6 and passes it through shaft ducts 8, 9 to the gearing bearings and to the clutches and brakes. The oil splashes over the walls of the gear-case, which is provided externally with cooling fins, and returns to the sump. The outside of the housing of the attached electric motor is also finned and carries a box containing the ratio selecting, &c. device 11, Fig. 2. Alternatively, the ratio establishing clutches and brakes may be hydraulically or mechanically actuated.
Patent GB-397767-A (GB)
Title: Improvements in or relating to winding, hauling, hoisting and like gear
IPC: B66C3/12
Filed: 1933-02-01
Abstract: 397,767. Winding-apparatus. DAVISON, J. W., 19, Ashbourne Grove, Whitefield, Lancashire, PERRY, J. F., The Cottage, Bolham, Tiverton, Devon, and ASSOCIATED ELECTRICAL INDUSTRIES, Ltd., Crown House, Aldwych, London. Feb. 1, 1933, No. 3153. [Class 78 (v).] In winding-gear for operating a pair of oppositely moving cages &c. between any chosen pair of levels of the kind in which the cables supporting the cages are each wound on a separate drum, one drum 1 being fast on a driven shaft 2 and the other drum 3 being capable of being clutched thereto, the drum fast on the shaft actuates a single overspeed and overwinding safety controller device 4 of the kind described in Specification 238,937, [Class 78 (v), Winding and paying-out apparatus &c.], through bevel gears 5, 6 and a shaft 7, and the drum loose on the shaft rotates through gearing one of the cam bearing members of the device. The shaft 7 rotates the fixed dial 8 Fig. 3, of the controller through spur wheels 11, 12 and a worm 9. The drum 3 drives a dial 13 freely mounted on the shaft of the dial 8 through bevel gears 15, 16, spur wheels 17, 19, 20, shaft 18, spur wheels 21, 22 and worm gearing 24, 25. The dial 13, Fig. 4, carries the retarding and brake regulating cam 28, the accelerating cam 29 and the limit cam 30.