baber/WOPTO huggingface dataset:
Patent GB-1004982-A (GB)
Title: Improved electrical switching device
Inventor: ACTON JOHN REGINALD
IPC: H03K17/78
Filed: 1960-10-20
Abstract: 1,004,982. Photo-electric switching. ERICSSON TELEPHONES Ltd. Jan. 22, 1962 [Oct. 20, 1960], No. 35913/60. Heading G1A. An electrical circuit switching arrangement comprises a neon-filled glow discharge tube 10 and a photoconductive cell or cells 11 in optical connection therewith within a light-proof container, the circuit arrangement including an impedance 16 for maintaining a continuous glow in the discharge tube 10, the glow being insufficient to cause substantial reduction in the impedance of the cell or cells 11 when the circuit is in the "off" condition. In the arrangement shown in Fig. 2 the current through the discharge tube 10 when the switch 15 is "on" is governed by the resistor 14. The resistor 16 is shown connected to the anode of the tube 10 and the resistor 14 to the cathode but the opposite arrangement can be used. In the arrangement shown in Fig. 3 the switch 15 is replaced by a gas-filled counting tube 23 of the "Dekatron" (Registered Trade Mark) type and the current through the discharge tube 10 in the "on" condition is governed by the anode resistor 25 of the "Dekatron" tube. The output from the cell 11 can drive the succeeding counting tube.
Patent GB-880689-A (GB)
Title: Improvements in or relating to extrusion plant for cable manufacture
IPC: B29C48/05
Filed: 1957-11-18
Abstract: 880,689. Automatic control systems. KRAFT, J., KRAFT, A., and KRAFT, J., [trading as KRAFT MASCHINENFABRIK, J. A.]. Nov. 18, 1957 [Nov. 17, 1956; July 26, 1957], No. 35922/57. Class 38 (4). [Also in Group IX] In a control system for extrusion plant for cable manufacture Ward-Leonard speed control is applied to each component driving motor, the generators of such sets having their excitations regulated directly or indirectly through magnetic amplifiers. The conductor is paid-out from reel Ab, fed through tension measuring rollers Tw1 and into the extrusion machine Sp where a plastic sheath is formed. The diameter of the sheathed cable is monitored at Dg, the cable being drawn from the machine Sp by drawing rollers Az ; it passes then over further tension rollers Tw4 and on to the take-up reel Aw. The motors M1-M4 are supplied by generators G1-G4 which, except for G4, are excited through magnetic amplifiers Mv1 Mv2, Mv3. The required processing speed is set on controller So and the device Dv distributes the appropriate signals to the magnetic amplifiers for maintaining the proportional relative speeds of motors M1-M3. The armature voltage of M3 is used to excite G4 so that the reeling motor speed varies with that of the drawing rollers. These two motors are excited in series from a D.C. source and M 1 and M2 are likewise excited from the same source. Speed control of motor M1 in dependence on the conductor tension is achieved by a signal from rollers Tw1 varying one resistance of a regulator Kr1 in G1 field circuit. The other variable resistance is for manual speed control. Similarly speed control of the take-up reel is achieved by a signal from rollers Tw4 operating regulator Kr4. The provision of a separate voltage source HS enables the reel to take-up cable slack prior to commencing the extrusion process. Constant speed in the extrusion machine is obtained by controlling amplifier Mv2 in dependence upon the output of tacho-generator Td2, thus compensating for load variations, and in dependence upon G2 armature voltage to compensate for supply variations. Amplifier Mv3 is likewise controlled by tacho-generator Td3 output and G3 armature voltage, but a supplementary control is provided by thickness gauge Dm fed by scanner Dg (which may be photo-electric) to maintain a constant cable diameter. The paying-out reel stand is constructed with provision for two reels, which can be driven simultaneously, and means for joining the ends of an expiring and a new reel whilst maintaining the feed. Similarly the take-up reel stand has provision for two reels and means for transferring the running cable from a full reel to an empty one, including a cutter for severing the cable. Each of the four reel supports pivots to facilitate reel removal. Mention is made of the possibility of varying the overall plant speed as a function of the temperature of the extrusion material so enabling the plant to start from cold.
Patent GB-1058580-A (GB)
Title: Method of producing a printed circuit board
Inventor: UNDERWOOD JOHN DUCKLES
IPC: H05K3/34
Filed: 1964-09-02
Abstract: 1,058,580. Etching. STANDARD TELEPHONES & CABLES Ltd. Sept. 2, 1965 [Sept. 2, 1964], No. 35927/64, Addition to 976,167. Heading B6J. [Also in Division H1] A printed circuit is formed by photo-etching a solder-coated copper-clad insulating board as described in the parent Specification, except that a single etching step is sufficient to remove both the unwanted solder and copper. The etchant is an aqueous solution comprising 140- 250 gm./l. ammonium persulphate and at least 10 ml./l. 42% w./v. fluoroboric acid, with nitric acid and sulphuric acid as optional additives. An exemplary solution is: Ammonium persulphate 200 gm. 42% w./v. fluoroboric acid 17 ml. 70% w./v. nitric acid 2 ml. 1.84 s.g. sulphuric acid 18.5 ml. Distilled water to 11.
Patent GB-1468870-A (GB)
IPC: G01F23/00
Filed: 1974-08-16
Abstract: 1468870 Dish-washing machines EUROPE MFG TRUST REG 16 Aug 1974 [9 July 1974] 36275/74 Heading A4F [Also in Division G1] The supply of liquid to a tank 1, e.g. in a dishwashing machine, is controlled by a valve (not shown) which is actuated electrically by a diaphragm switch 15. To ensure positive operation of this switch the diaphragm 16 is connected via a tube 14 with a chamber 9 so that when the liquid level in tank 1 reaches its maximum 2, some of the liquid is siphoned via tube 8 into the chamber 9 producing a sudden increase in the airpressure in the tube 14.  The siphon tube 8 remains filled and, when in a later stage of operation, the tank 1 is emptied by a draining pump 6 the liquid level in chamber 9 is reduced at the same time as that in the tank 1 until it reaches the minimum 3 when the siphon is broken and chamber 9 is connected to the atmosphere through tube 10. A filling tube 17 is provided so that clean liquid is fed into the chamber 9.
Patent GB-343980-A (GB)
Title: Electrical transmission systems
IPC: H04B3/20
Filed: 1929-11-27
Abstract: 343,980. Two-way repeaters. ELECTRICAL RESEARCH PRODUCTS, Inc., 195, Broadway, New York, U.S.A.-(Assignees of Silent, H. C. ; 14, Locust Avenue, Larchmont, Westchester, New York, U.S.A.) Nov. 27, 1929, No. 36365. Convention date, Nov. 27, 1928. [Class 40 (iv).] In the neighbourhood of the junction of 4- wire and 2-wire paths, each pair of the 4-wire section is normally disconnected or short-circuited by a relay individual to the pair which relay when operated removes this disablement and further disables the other pair. This enables the pairs to be connected in parallel, Figs. 3 and 5' or in series, Fig. 4, without the use of the usual hybrid coils and balancing network. In the arrangement shown in Fig. 5 the echo-suppressing relay 6 short-circuits the relay 7 of the other channel whereas relay 7 short-circuits the channel L2. In another form both relays on operation disconnect the other relay, and in another both relays short-circuit the other channel. Apparatus VCA15 is provided for automatic gain regulation. In the arrangement shown in Fig. 3 the channels are disabled with the aid of transformer arrangements 12, 13, which transmit or not according to the position of contacts S1, S4, of relay 7.
Patent GB-980525-A (GB)
Title: Improvements in or relating to projectors for projecting an indicator sign on to a screen
IPC: G03B21/00
Filed: 1962-09-25
Abstract: 980,525. Projection systems. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Sept. 25, 1962 [Sept. 28, 1961], No. 36400/62. Heading G2J. A projector for projecting an indicator sign on to a screen comprises a first mirror for directing an image of the sign on to a second mirror which directs the image on to a screen, the two mirrors having mechanism for rotating them about axes arranged at an angle to each other for moving the image about the screen, the mechanism being coupled together by means which are operable to bring about a corrective rotation of one mirror as a function of the position of said second mirror in order to obtain a prescribed movement of the image upon rotation of said second mirror. In the embodiment shown in Fig. 4 mirrors 6, 8 are rotated by motors acting through gears 15, 24 and rods 16, 25 and sleeves 17, 27 respectively. The sleeves are arranged for longitudinal movement, sleeve 17 moving sleeve 19 longitudinally so that a cam 20 thereon rotates lever 21 and through gears 22, 23 rotates mirror 6 and sleeve 27 rotates lever 29 and through gears 30, 31 rotates mirror 8. Each set of gears 22, 23, 30, 31 has a ratio of 1: 2. Sleeve 19 can be moved longitudinally relative to sleeve 17 by means of cam 39 on sleeve 27 operating through pins 36, 37 on plates 33, 34 pivoted at 35 against which pin 32 on sleeve 19 is urged by means not shown. Thus movement of mirror 8 by means of sleeve 27 causes a corresponding adjusting movement of mirror 6 except when mirror 6 is in its central position when pin 32 abuts pivot 35 and not plates 33, 34. In Fig. 6 the adjusting device of Fig. 4 is replaced by cam 52 which moves a pin 51 vertically and hence also pin 42, a knife edge of which, controls the rotation of mirror 6 via pivoted lever 44 and sliding pin 41. This has no effect except when mirror 6 is not in its central position and lever 44 has been pivoted away from the vertical by means of sleeve 40. In the embodiment shown in Fig. 9, mirror 8 (not shown) which is mounted on a support 55 is rotated about an axis 54 to allow for its rotation about axis 9 by means of a rod 57 mounted on the mirror which moves over a cam 59 on the adjusting means for mirror 6 (not shown).
Patent GB-1002179-A (GB)
Title: Improvements in or relating to electrical signal transmission circuit arrangements
IPC: H04B3/18
Filed: 1962-09-26
Abstract: 1,002,179. Automatic exchange systems; transmission systems; pulse modulation systems. SIEMENS & HALSKE A.G. Sept. 26, 1962 [Sept. 26, 1961], No. 36484/62. Headings H4K, H4L and H4R. In a transmission system in which two lines are alternately connected to a single storage device, the device has a variable time constant. Thus when a plurality of subscribers are connected over lines of different lengths whereby the attenuation of the signals on any particular line is greater than or less than a certain " standard " value for the system, variation of the time constant of the storage device in dependence upon the nature of the line in use, causes that device to act in effect as a positive (infinite) or negative impedance vis as an attenuator or as an amplifier. A " resonant transfer " technique is used for passing information into and out of the storage device LC, the variable time constant being provided by " resistor " R. The natural frequency of the LC circuit should be equal to an integral multiple of the frequency at which gates ZS<SP>1</SP> or ZS<SP>11</SP> are closed which latter frequency itself should be at least double the highest frequency to be transmitted and the natural period of oscillation for the circuit l, L, C, should be twice as long as the period for which a switch ZS<SP>1</SP> or ZS<SP>11</SP> is closed. It should be noted that the opening of gate ZS<SP>11</SP> occurs at a time midway between successive openings of gate ZS<SP>1</SP>. A mathematical discussion in respect of the attenuation introduced by positive and negative values of impedance R is given in the Specification. A transistor circuit which may be automatically biased to act as an amplifier or attenuator in dependence upon the lines used, is described with reference to Fig. 3 (not shown), this form of control being particularly useful when the storage device is connected to a highway of a time division multiplex system where rapid adjustment of the time constant of the device in respect of each time slot is required. The use of pulse shaping networks between the inductances l1 or l2 and their corresponding switches ZS<SP>1</SP> or ZS<SP>11</SP>, which networks serve to convert sinusoidal waves from the capacitors c1 or c2 into square waves whereby the total signal power passable by the switches may be increased, is also mentioned. Specification 969,252 is referred to.
Patent GB-914318-A (GB)
Title: A new or improved device for applying weed-killing or fertilising liquids to lawns and ground surfaces
IPC: A01M21/04
Filed: 1960-10-25
Abstract: 914,318. Weeds destroying; rollers. DELLOW, T. W. Oct. 18, 1961 [Oct. 25, 1960], No. 36602/60. Class 6(1). A device for applying weed-killing or fertilising liquid to the ground comprises a drum built up from dished end plates 2a, 2b permanently secured to a cylinder 1 having perforations 3 distributed over its surface. A liquid container is housed within the drum and has one end wholly or partially open. As described the container comprises a cylinder 9 secured to the end plate 2b so as to provide an annulus 10 into which liquid flows from the open end 9a of the container. A covering sleeve 8 of foamed plastics material, foamed rubber or felt is secured to the cylinder 1 by an adhesive or by encircling bands.
Patent GB-1200924-A (GB)
Title: Improvements in or relating to air conditioning apparatus
Inventor: GILBERT DANIEL
IPC: F24F3/153
Filed: 1967-08-09
Abstract: 1,200,924. Air conditioning apparatus; heating and cooling buildings. CARRIER ENG. CO. Ltd. 26 July, 1968 [9 Aug., 1967], No. 36627/67. Headings F4U and F4V. An air conditioning system comprises a primary air supply chamber 2 which includes a fan 9 drawing air from an enclosure 5 to be air conditioned; a spill air outlet 12 housing a heat reclaim coil 13, a fresh air inlet 14, a dehumidifier 15, a fan 17 and a heater 16, the primary air being supplied through a conduit 7 to air induction units 8, as described in Specification 809,905. Each unit 8 includes a secondary air damper controlled manually or thermostatically and the chamber 2 includes dampers 18, 19, 20 which are controlled manually or thermostatically and collectively. The coil 13 and dehumidifier 15 are included in a cold water circuit together with secondary air cooling coils 34 in the units 8 and an evaporator 33. The heater 16 is included in a hot water circuit together with a water heater 44 which is connected to a vapour compressor 48 in common with the evaporator 33. Surplus heat is extracted from the system by a third water circuit including a condenser 49 and a cooling tower 55. At night, hot water supplied by an electrically heated thermal storage vessel 56 is passed through the coils 34 in the units 8, the remaining apparatus being closed down.
Patent GB-1299978-A (GB)
Title: An improved lifting tine
Inventor: NEEDS RONALD ARTHUR
IPC: B66C1/24
Filed: 1970-07-29
Abstract: 1299978 Load-gripping forks LONDON BRICK CO Ltd 27 May 1971 [29 July 1970] 36760/70 Heading B8H Each tine of a fork adapted to lift stacks of bricks consists of a body member 10 having front and rear end plates 13, 14 interconnected by a plate 12 and rotatably supporting rods 17 welded to gripper elements 11. Each gripper element 11 consists of two arms 11a, 11b arranged at an angle of 105 degrees, whereby, in the non-operative position shown in broken lines, the arm 11a is vertical and the arm 11b projects upwardly. On raising the tine into engagement with an overlying load, the arm 11a, with a rubber gripper block 20, is moved outwardly towards an adjacent tine to grip the portion of the load therebetween. The fork may be mounted on a lift truck, a brick barrow or a lifting attachment for a crane.
Patent GB-998312-A (GB)
Title: Method and apparatus for determining the swelling properties of coal
IPC: G01N33/22
Filed: 1961-10-13
Abstract: 998, 312. Photo-electric measurement. STAMICARBON N.V. Oct. 13, 1961 [Oct. 13, 1960], No. 36926/61. Heading G1A. The invention relates to a method of and apparatus for determining the swelling properties of coal during coking and is concerned with measuring photo-electrically the cross-sectional area in a number of planes of a coke button allowed to swell freely during the coking process. In one arrangement (not shown) the coke button is disposed between a number of light sources, acting in different planes, and their associated photoelectric elements. In an alternative arrangement (Fig. 1) the coke button is placed in a transparent or apertured or translucent container 43 which is rotated perpendicular to a parallel beam of light from a source 46 received by the photo-cell 47. In each case the output of the cell or cells gives a measure of the volume of the coke button. Fig. 1 also shows means for investigating a sequence of samples comprising a rotary carrier with four radial arms spaced at 90 degree intervals, each arm carrying a crucible 1, 2, 3, 4, the crucibles being automatically moved in succession to four stations I, II, III, IV. At station I the crucible is filled with a coal sample. At Station II the sample is carbonised in a furnace 5 which allows the coal to swell freely. At station III the crucible is pneumatically emptied, the sample being transferred to the measuring apparatus which comprises a transparent carrier 43 which is rotated in a parallel beam of light received by a photo-cell 47. At station IV the crucible is blown clean.
Patent GB-368818-A (GB)
Title: Improvements in and relating to closures for bottles, pots, and the like
IPC: B65D55/08
Filed: 1930-12-09
Abstract: 368,818. Stoppers for jars &c. EARLE, K. J., 2, Midcroft, Ruislip, Middlesex. Dec. 9, 1930, Nos. 37041/30 and 11286/31. [Class 125 (iii).] In a closure of the type in which the rim of a pot, jar, &c. is covered by a piece of material C reinforced over and around the rim by a piece of binding material B adhered to the cover portion at G, the reinforcing material or the cover is of circular, square, &c. form sealed at its lower edges G<1> to the container by gum and/or by tying s, t an intermediate portion P being left free which may be broken, through perforations &c., in order to separate the closure from the container. Either of the two components may be cut or notched at its edges to allow of ready bending to the form of the container top. The tie, the ends of which are sealed together, may be adhered to the corners of the component which extends furthest down the container sides, Fig. 14. The cover or binder component may have a central hole, and a cork &c. stopper DS may be forced inwards, prior to sealing at G<1>, to make a firmer closure, Fig. 12. If the binder B is of celluloid, Fig. 14, the binder and cover are preferably first adhered together, then laid on the jar &c., the celluloid being then heated by steam &c. and forced over the edge of the jar &c. to form a springy reseal closure after the jar has been opened. Specification 362,559 is referred to.
Patent GB-884705-A (GB)
Title: Improvements in electric discharge apparatus for producing high localized temperatures
IPC: H05H1/16
Filed: 1957-11-28
Abstract: 884,705. Nuclear fusion reactors; magnetrons. ENGLISH ELECTRIC CO. Ltd. Nov. 27, 1958 [Nov. 28, 1957], No. 37089/57. Classes 39(1) and 39(4) Apparatus for generating high local temperatures in an ionised gas by the action of a selfconstricting electrical discharge comprises means for producing a periodic electrical discharge through the gas in the direction of a magnetic field at a frequency which is an integral multiple of the cyclotron frequencies of the gas ions in that field. In Fig. 2 the discharge chamber comprises two frusto-conical electrodes 20a 20b having apices at a common point and a part spherical shield 20c, and forms a cavity resonator resonant at a frequency which is a multiple of the cyclotron frequency of the gas in the chamber, which may be deuterium. A magnetic field extends between electrodes 20a 20b, and the resonator may be shock-excited through a switch, operated at the resonant frequency, and delay lines 22, 26 charged from a D.C. source. Energy produced within the chamber by nuclear fusion reactions may be abstracted by a cooling jacket (not shown) surrounding electrode 20c. In a modification, Fig. 3, the part spherical electrode 30 is provided with resonant cavities 35 which operate by a magnetron type action to supply an electrical output, for example through probes provided in the cavities. Heat may also be abstracted by cooling tubes 34 which surround electrode 30 and the frusto-conical electrodes 31, 32. Magnetic pole-pieces 11a 11b fit inside electrodes 31, 32, but are insulated from them, and are provided with channels 37a 37b through which gas may be fed to the chamber. An electron emitting filament 40 may be situated in one of the channels to enable the gas to be ionised. A vacuum pump (not shown) may be connected to the chamber to maintain its pressure at about 10<SP>-5</SP>mm. The chamber may be surrounded by a shield of lithium hydride which, under neutron bombardment, produces tritium which can be collected and fed into the chamber.
Patent GB-1441076-A (GB)
Title: Method of manufacturing flash light lamps
IPC: F21K5/08
Filed: 1974-08-23
Abstract: 1441076 Annealing flash-bulb fillings PHILIPS ELECTRIC & ASSOCIATED INDUSTRIES 23 Aug 1974 [28 Aug 1973] 37145/74 Heading C7N [Also in Division G2] The mass of combustible material of a flash-light lamp is manufactured before it is disposed in the lamp envelope by placing strips of the combustible material 3 in a tube 1 and compressing the material to the desired shape by means of dies 5, 2 and subsequently annealing the mass 3 in this shape in the tube to relieve stresses in the mass. One of the dies may be shaped, as at 13, to shape the mass 3, which may comprise Al, Mg or Zr strips. The annealing may be carried out in nitrogen or argon at more than 400C or in a vacuum at more than 250C by means of concentrated light beams from halogen lamps disposed at the focus of elliptic reflectors. Alternatively, as shown, the annealing may be carried out by means of a high frequency electromagnetic field produced by a coil 9 surrounding the tube 1. After the annealing the shaped combustible mass is inserted into a flashlight lamp envelope which is then sealed.
Patent GB-329358-A (GB)
Title: Developing apparatus
IPC: G03D7/00
Filed: 1928-12-17
Abstract: 329,358. Langsner, A. Dec. 17, 1928. Developing-apparatus.-Apparatus for developing photographic papers by a gas comprises a compartment having an opening for inserting the paper, and means controlled by a closure member for the opening for evolving the developing gas and emitting it into the compartment. In one form, the paper is inserted into a tubular tower 76 which fits on to a base 50 supported on legs 52. The base 50 consists of a liquid reservoir closed by the cap 70 which is pivoted at 51 and has an extension 63 adapted to be engaged by a part of the tower. The connection may be such that the cap 70 is raised, allowing the developing gas to enter the compartment 76 either by the act of fitting the tower 76 on the base or by rotating the tower 76 after it has been so fitted. A bracket 72 for supporting the paper is mounted on the base 50 above the cap 70.
Patent GB-1477960-A (GB)
Title: Phosphorus-nitrogen ring compounds
IPC: C07F9/6584
Filed: 1975-09-11
Abstract: 1477960 Diazaphospholidines MONSANTO CO 11 Sept 1975 [12 Sept 1974] 37364/75 Heading C2P The invention comprises compounds of formula (wherein all R's are identical and are Me or Et) in anhydrous or hydrated form; and their preparation by reaction of P(O)(NHR) 3  with glyoxal in a substantially neutral aqueous medium. N,N<SP>1</SP>,N<SP>11</SP> - Trimethylphosphoric triamide (m.p. 105-110‹ C.) is prepared by adding excess dry MeNH 2  to POCl 3  in heptane at 35‹ C., extracting with aqueous NaOH, separating, concentrating and filtering the aqueous phase, and subjecting the filtrate to azeotropic drying with chloroform, filtration, concentration and crystallization. Compounds I are used for flameproofing cellulosic textiles by conventional processes.