baber/WOPTO huggingface dataset:
Patent GB-659808-A (GB)
Title: Improvements in or relating to electric pulse repeaters
Inventor: REEVES ALEC HARLEY
IPC: H04L25/04
Filed: 1947-05-12
Abstract: 659,808. Pulse amplifying circuits. STANDARD TELEPHONES & CABLES, Ltd. May 12, 1947, No. 12771. [Class 40 (vi)] A pulse amplifier comprises a cold cathode gas-filled discharge tube having a main and an auxiliary discharge gap the potentials applied to which are initially such that the tube does not fire. Input pulses are applied to the auxiliary gap to cause this and thus the main gap to fire, the tube is subsequently extinguished and the amplified output pulses are derived from the main gap circuit. Fig. 1 shows a cold cathode tube 1 having a main anode 2, triggering anode 4, cathode 3 and ionization control electrode 5. Pulses to be amplified are applied across input transformer 10 and after shaping trigger off the tube 1 which is subsequently extinguished by the squegging action of capacitor 17, as described in Specification 659,805 (see Group XL (a)), the pulse produced across resistor 12 is taken from across the output transformer 13. The stability of firing potential of the tube at low pulse speeds is improved by the ionization control electrode 5 as described in Specification 639,827 (see Group XL (a)). To lessen the likelihood of circuit failure two repeaters may be used in tandem the amplitude of the output pulse being limited by the biassed rectifier 19, the rectifier 18 shunting the repeater in the case of its breakdown. Fig. 3 shows a modification for use at high pulse repetition frequencies when the pulses are grouped in successive'trains. Tube 23 has a main anode 27, a triggering anode 28, a control electrode 29 and a cathode 24. The cathode has both a flat and corrugated portion as described in Specifications 639,827, and 639,841 (see Group XL (a)). The first pulse of a train fires the: tube and a discharge takes place between the first point of cathode section 25 and anode 28 which spreads to main anode 27. When the pulse ceases, the discharge is maintained by battery 6 and when the second pulse is applied the discharge spreads to the next point on the corrugated cathode 25, this progressive firing continuing until the discharge spreads to the flat cathode portion 26 when the squegging action of capacitor 15 extinguishes the tube. The time constants of the circuit components are such that the tube is ready to fire when the first pulse of the next wavetrain appears. The output pulses are derived from resistor 12, the change in potential drop across resistor 12 as different cathode points are struck being compensated by rectifier 30 and inductor 31. Rectifiers 36, 37 limit the excursions of the output pulses in both positive and negative directions.
Patent GB-551724-A (GB)
Title: Improvements in and relating to methods of and means for measuring the power factor of electrical insulation in alternating current supply systems
IPC: G01R27/26
Filed: 1941-10-03
Abstract: 551,724. Power-factor and capacitance measurements. WARREN, T. R. Oct. 3, 1941, No. 12808. [Class 37] For measuring the power-factor and capacitance of a dielectric, such as a bushing A, Fig. 1, a 'tapping B is provided on the lamination A<SP>11</SP> adjacent to the earth lamination A<SP>1</SP> and is connected through a variable condenser K and resistance R to the earthed secondary winding C<SP>11</SP> of an auxiliary transformer C, the primary C<SP>1</SP> of which is energized from the earthed secondary winding D<SP>1</SP> of the potential transformer D which supplies a normal load E comprising instruments &c. A thermionic detector F of the type described in Specification 531,538 is connected between the tapping B and earth and the condenser K and resistance R are adjusted until balance is obtained, the E.M.F. of the secondary winding C<SP>11</SP> being of opposite polarity to that applied to the bushing A. From the values of the,capacitance K and resistance R the total phase angle error of the bushing A and the two transformers C, D may be obtained. By deducting the known phase angle error of the two transformers the phase angle error of the bushing is obtained. The capacitance of the bushing may also be deduced from these values. Instead of the auxiliary transformer, a third winding may be provided on the potential transformer D. For oil or compound filled bushings it is necessary to include in the measurements the leakage currents flowing across the surface of the porcelain. This may be effected by means of a guard ring L, Fig. 3, connected to a tapping from a lamination of. the bushing H and to the testing equipment N. Alternatively the whole bushing may be lightly insulated from earth, the potential tapping not being required. Each bushing on the system to be tested may be represented on a diagram by a jack electrically connected to it by means of a screened lead. This connection is earthed at the jack until the plug is inserted to extend it to the testing equipment. The auxiliary potential supplies are also connected to the jacks and from thence to the test set by means of the plug. The testing equipment may be. mounted on a trolley. Where the bushings can be isolated and tested by other means, the phase angle error of potential transformers, may be measured by deducting this value from the total phase angle error of the transformers and bushing.
Patent GB-218070-A (GB)
Title: Improvements relating to means for securing the valve springs of internal-combustion engines and the like
IPC: F01L3/10
Filed: 1923-05-14
Abstract: 218,070. Pearce, H. J. May 14, 1923. Spinddes.-A spring abutment for poppet valves of internal-combustion engines and the like comprises two interlocking members A, B, the latter of which is formed with a keyhole slot E, so that when the spring X has been compressed by means of the member A, the member B may be placed over the end of the valve stem D and slid sideways into engagement with a groove F therein, the member A being then released so that lugs on the two members interlock as indicated in Fig. 6.
Patent GB-600578-A (GB)
Title: Improvements in hydraulic valve assemblies
IPC: B30B15/16
Filed: 1945-06-23
Abstract: 600,578. Valves for hydraulic presses. TAYLOR, A. H., and BOLTON, E. A. June 23, 1945, No. 12846. [Classes 69 (ii) and 135] In a valve assembly for controlling the supply of low and high-pressure hydraulic fluid to a press, four self-contained units comprising a low-pressure non-return valve unit A, Fig. 5, a low-pressure regulating valve unit B, a high-pressure regulating valve unit C, and an exhaust valve unit D are assembled in a single housing so that any unit may be removed without disturbing the others. The housing is formed with end-plates 44, 45 secured to sideplates 50 which are connected to the units by screws 55. Cup-leathers 53, 54, Fig. 1, between the units and the end-plates and elongated holes (not shown) in the side-plates for the screws 55 ensure fluid-tightness. As shown in Fig. 1, low pressure liquid from an inlet 6 passes through a filter 4 and past a non-return valve 2 to a low-pressure regulating valve 8 which is opened by air pressure acting under the diaphragms 18 of an air motor 17 and retained open when the pressure on the top 9 of the valve exceeds the pressure on the lower part 12 thereof assisted by a spring 15, and thence flows around the closed high-pressure regulating valve 20 and the 'exhaust valve 30 to the press. At the same time, high pressure liquid from an inlet 24 enters the chamber 62 of the high-pressure regulating valve 20 which is held closed by the excess pressure acting on the larger lower surface of the chamber over that of the smaller underside area of the valve, assisted by a spring 23 and is opened when the low pressure liquid acting on the cup-leather 21 builds up to a value to overcome this excess pressure and the spring 23 to supply high pressure liquid to the press. To open the press to exhaust, the valve 30 is opened by admitting air beneath the diaphragms 37 of an air motor 38 and exhausting air from beneath the diaphragms 18 of the air motor 17. When the liquid pressure has fallen sufficiently, the highpressure regulating valve automatically closes followed after a further fall in pressure by the low-pressure regulating valve. The Provisional Specification describes a modification in which the side and end-plates are replaced by flanges formed on the ends of the units over which upper and lower half clamps having a channel section embrace adjacent units and are held together by nuts and bolts passing through lateral horizontal flanges on the clamps.
Patent GB-178343-A (GB)
Title: Improvements in veterinary appliances
IPC: A61D7/00
Filed: 1921-05-05
Abstract: 178,343. Rae, J. S. May 5, 1921. Syringes.-In an appliance for inflating the udder with air or other inert fluid, a rubber bulb is fitted with a non-return valve 2 and a fine nozzle 9 on a metal body 3. The bulb is fastened to the metal body by a ring 6; and the body is adapted to receive a detachable protecting-cap 8.
Patent GB-1189481-A (GB)
Title: Stable Liquid Compositions of Matter
IPC: C09K23/00
Filed: 1967-03-20
Abstract: 1,189,481. Stable, liquid herbicidal compositions. FMC CORP. 20 March, 1967 [18 April, 1966], No. 12888/67. Heading A5E. [Also in Divisions B1, Cl, C3, C5, C7 and H1] Compositions comprising a major proportion (by wt.) of a liquid medium that either includes or consists of a non-aqueous material contain as a thickening and dispersing aid a chemically modified microcrystalline colloidal chrysotile with a SiO 2 :MgO ratio 1.05-1.30:1 by weight and with at least 10% by weight of its particles being of submicron size (see Specification 1,142,461), in an amount 0.1- 50% by weight of the liquid medium present. In Examples IX and XII herbicidal compositions are formulated from the microcrystalline colloidal chrysotile and aqueous solutions of zinc and magnesium chlorides, respectively.
Patent GB-866368-A (GB)
Title: Air blast circuit breaker with auxiliary interrupter for parallel resistors
IPC: H01H33/16
Filed: 1958-04-23
Abstract: 866,368. Gas-blast switches. BROWN, BOVERI & CIE A.G. April 23, 1958 [April 23, 1957], No. 12920/58. Class 38 (5). A circuit-breaker generally similar to that of Specification 803,714, has the contacts of the auxiliary interrupter in series with the resistor 5 and which are opened by the magnetic effect of the current which passes through the resistor. A conductor coil 17 in series with the resistor attracts an iron core 18 attached to the piston contact 10 to move it against the bias of springs 9. If the current in the resistor is insufficient to produce attraction of the core 18 pressure air will pass through a throttle 22 to act on a piston 19 to open the contacts 4, 10 after a time lag. The resistor itself may be constructed as the actuating coil, or the opening force may be provided by a spring when released.
Patent GB-583377-A (GB)
Title: Improved means for coupling an electric oscillator to a load
IPC: H03H2/00
Filed: 1944-07-07
Abstract: 583,377. Generating high frequency oscillations. CLIFFORD, F. G. July 7, 1944, No. 12974. [Class 40 (v)] An electric oscillator, incorporating a tank circuit which is variable to tune the oscillator over a wide range of frequencies, is coupled to a load by a band-pass filter formed by a tuned transformer, the primary of which is tuned by a parallel condenser and tho secondary by a series condenser. The electrical oscillator O is coupled to a resistive load R2 through an output valve and a band-pass filter L2C2, L3C3. The condensers C2, C3 may be ganged to the condenser C1 of the oscillator.tank circuit and by having suitable values for the inductances, the mid-band frequency of the bandpass filter can be made to coincide with the oscillator frequency over the whole range covered, at the same time keeping the efficiency of the band-pass filter constant. The above circuit is designed to reduce the harmonic content of the oscillator output. Specification 577,608 is referred to.
Patent GB-981686-A (GB)
Title: Refractory linings for kilns
IPC: F27B7/00
Filed: 1963-04-02
Abstract: 981,686. Furnace bricks. CANADIAN REFRACTORIES Ltd. April 2, 1963 [May 4, 1962], No. 12976/63. Heading F4B. A shaped refractory brick includes a onepiece metal case attached to and covering a portion of three sides of the brick which form any one corner whilst leaving said corner exposed. A wedge-shaped, non-acid brick 10, having hot and cold faces 13 and 13a, respeetively, is partially covered by a metal case 11 comprising three planar sections 12, 14 and 15 so arranged as to leave corner 20 and portion 18 of brick face 16 exposed. The section 15 is provided with an expansion crimp 30. A lining for a tubular kiln 40, Fig. 3, comprises contiguous rings of said refractory bricks. The exposed areas 18 and 20 of the bricks collect molten metal which promotes fusing of juxtaposed bricks as indicated at 25 and 26.
Patent GB-1218931-A (GB)
Title: Switching type voltage and current regulator and load therefor
IPC: H05B41/234
Filed: 1968-03-18
Abstract: 1,218,931. Metal-vapour lamps. RCA CORPORATION. 18 March, 1968 [31 March, 1967], No. 12984/68. Heading H1D. [Also in Divisions G3 and H2] A D.C. operated mercury arc lamp, comprising an outer glass envelope and a fused quartz inner envelope, has associated with it a voltage and current regulating circuit (see Division G3). This circuit may be built into the neck of the lamp, which is also provided with a starting electrode.
Patent GB-738381-A (GB)
Title: Improvements in or relating to the preparation of new steroid substances
Inventor: JONES EWART RAY HERBERT
IPC: C07J9/00
Filed: 1952-05-22
Abstract: The invention comprises 3b -hydroxy-11-keto steroids and 3-esters thereof, which possess an a -hydrogen atom or an a -hydroxy or acyloxy group in the 5-position, and in which the hydrogen atom in the 9-position has the b -configuration. Specified 17-substituent groups are -CO.CH3; -CH(CH3)CHO; -CH(CH3) CO.CH3; -CH(CH3).CO2H; -CH(CH3)CH: CH.CH(CH3).CH(CH3)2; and -CH(CH3)CHX. CHX.CH(CH3).CH(CH3)2, where X is chlorine or bromine.  The invention also concerns a process for their preparation by catalytic hydrogenation of the corresponding D 7 : 8 steroids, preferably using a platinum oxide or palladium-charcoal catalyst.  The required D 7 : 8 steroids may in turn be prepared from 3b -hydroxy or acyloxy-9 : 11-oxido-D 7 : 8-steroids which have an a -hydrogen atom or an a -hydroxy or acyloxy group in the 5-position by treatment with a "Lewis acid" particularly boron trifluoride or stannic chloride, stopping the reaction when the optical rotation of the mixture reaches a minimum to prevent rearrangement to a D 8 : 9 isomer.  The configuration of the 9-hydrogen atom of the compounds of the invention can be reversed by treatment with strong alkali yielding the normal (9-a ) compounds.  In examples (1) 3b -acetoxy-11-keto-9b -ergosta-7 : 22-diene is hydrogenated, using Adam's catalyst to give 3b -acetoxy-11-keto-9b -ergostane; (2) 3b -acetoxy-22 : 23-dibromo-11-keto-9b -ergost-7-ene is catalytically hydrogenated, and the resultant ergostane debrominated with zinc to produce 3b -acetoxy-11-keto-9b -ergost-22-ene; (3) 3b  : 5a -diacetoxy-11-keto-9b -ergosta-7 : 22-diene is hydrogenated to 3b  : 5a -diacetoxy - 11 - keto - 9b  - ergostane; (4) 3b -acetoxy - 5a  - hydroxy - 11 - keto - 9b  - bisnorallocholanic acid methyl ester is similarly prepared from the corresponding D 7 compound; (5) 3b  - acetoxy - 22 : 23 - dibromo - 9a  : 11a -epoxyergost-7-ene is treated with boron trifluoride-ether complex to yield 3b -acetoxy-22 : 23 - dibromo - 11 - keto - 9b  - ergost - 7 - ene.  3b  - acetoxy -, 3b  - acetoxy - 5a  - hydroxy - and 3b  : 5a  - diacetoxy - 11 - keto - 9b - ergosta-7 : 22 - diene, and 3b  - acetoxy - 5a  - hydroxy-11 - keto - 9b  - bisnorallochol - 7 - enic acid methyl ester are likewise obtained from corresponding epoxides; (6) 3b -acetoxy-11-keto-9b -ergostane is isomerized by refluxing in ethanolic potassium hydroxide followed by reacetylation to give 3b -acetoxy-11-ketoergostane.  Details for the rearrangement of 3b -acetoxy-11-keto-9b -ergost - 22 - ene, 3b  : 5a  - diacetoxy - 11 - keto-9b  - ergostane and 3b  - acetoxy - 5a  - hydroxy-11 - keto - bisnorallocholanic acid methyl ester are also given.
Patent GB-404721-A (GB)
Title: Improvements relating to illuminated signs, advertisements and the like
IPC: G09F13/26
Filed: 1933-05-05
Abstract: 404,721. Electric discharge tube signs; changing signs. VEREKER, H. C., 19, Eton Villas, Hampstead, London. May 5, 1933, No. 13022/32. [Classes 3 (i) and 3 (ii).] A sign comprises a glass panel bearing representations illuminated from the rear and forming a background for an electric discharge tube shaped as a character, and a casing which houses the electrode chambers of the discharge tube and the transformer energising the tube. As shown in Figs. 1, 2 a panel 3 serves as a background and support for discharge tubes 4 having electrode chambers 6 projecting through the panel into a casing 1 which houses a transformer 11. The panel is non-transparent save for an arrow inscription 7 illuminated by a discharge tube 8 similarly shaped or by a discharge tube 9 mounted in a reflector 10. In a modification Fig. 4, the panel is illuminated by a discharge tube 13 mounted in a reflector 14. In a further modification in which the tubes 4 are shaped to form an elephant, the panel is illuminated by an incandescent lamp mounted in a reflector such as 10, Fig. 2. The panel 3 may be suspended below the casing 1, the tubes 4 then being bent upwardly behind the panel, and a discharge tube may be arranged around the edges of the panel. The tubes 4 and the lamp illuminating the panel may be flashed and the surface of the panel which does not bear the representation may be silvered.
Patent GB-1147542-A (GB)
Title: Air cooled tyre abrading rasp
Inventor: TOBEY ALTON EARL
IPC: B23D71/02
Filed: 1967-03-21
Abstract: 1,147,542. Abrasive tool. A. E. TOBEY. 21 March, 1967 [25 April, 1966], No. 13068/67. Heading B3D. A tyre abrading rasp comprises a rotatable circular disc having a plurality of circumferentially spaced slots extending radially into the periphery thereof and a pair of annular abrading elements concentrically secured respectively to each side face of said disc adjacent the periphery thereof and overlying said slots, said elements having abrading surfaces on their exposed side faces. A disc, e.g. of brass, has alternate long slots 17 and short slots 18. Annular elements 19, 21 are secured to the side faces of the disc with their peripheries flush with the disc periphery. The periphery of the disc and the peripheries and side faces of the elements 19, 21 are coated with abrasive material 24.
Patent GB-730651-A (GB)
Title: Improvements in automatic control equipments for engine-generator sets
IPC: H02P9/04
Filed: 1952-05-23
Abstract: 730,651. Transmitting mechanical power. LICENCIA TALALMANYOKAT ERTEKESITO VALLALAT. May 23, 1952 [May 26. 1951], No. 13102/52. Drawings to Specification. Class 38 (4). Automatic control equipment for the enginegenerator set of a Diesel-electric vehicle comprises an engine governor to limit engine speed by controlling the quantity of fuel supplied to the engine, means to limit said quantity in two or more ranges, means responsive to current flow in the generator motor loop for controlling the strength of separate excitation current of the generator to maintain a constant generator current at lower vehicle speeds, and speedsensitive electric regulating means independent of the engine governor to maintain a constant engine speed on attainment of a predetermined vehicle speed by regulating the generator load. Thus, the separate excitation circuit may include, in series with the field winding, two carbon piles, the operating coil of one of which is energized in proportion to the generator current, whilst the coil of the other is fed by a tachometer generator driven by the engine, the feed circuit including a variable resistor adjusted by the sliding sleeve of the governor, so that regulation is to full speed only with full charge to the engine.
Patent GB-812894-A (GB)
Title: Degreasing and dewaxing of vegetable fibres
Inventor: WHITE WILFRED ARTHUR STEPHEN
IPC: D06L1/22
Filed: 1955-05-06
Abstract: Cloth made from vegetable fibres is treated in open width in continuous manner for not more than five minutes in a bath of trichloroethylene or perchloroethylene, surplus solvent is removed, e.g. by pressure rollers, and the cloth is then treated in an aqueous bath at a temperature which produces rapid evaporation of the solvent.  The solvent, which may be at a temperature of 80 DEG  to 87 DEG  C., may be contained in a series of baths, e.g. three, through which the cloth passes, and may be circulated in a counter direction to the travel of the cloth. Evaporated solvent and solvent from the aqueous bath is recovered and re-used.  More than one aqueous bath may be used.  When trichloroethylene is used the aqueous bath may be above 73 DEG  C. and when perchloro-ethylene is used above 86 DEG  C. The cloth may be subsequently dried or may be forwarded in the wet state to a bleaching and desizing process.  Examples refer to the treatment of cotton, linen and jute.  Specifications 747,481, 749,705, 773,968, [Group III], 803,026, 803,796 and 812,893 are referred to.
Patent GB-143245-A (GB)
Title: Improvements in or relating to the lubrication of bearings for railway vehicles and the like
IPC: B61F17/22
Filed: 1920-05-12
Abstract: 143,245. Friedrich, W. March 9, 1918, [Convention date]. Lubricant conveyed by mechanical means. - Journals of railway-vehicle and other axles or shafts are lubricated by two rollers 5 arranged side by side and parallel with each other in a frame 6, and pressed against the axle 1 by springs 9. The frame is adapted to yield in all directions, the movements of the springs being limited by brackets 7 engaging in frames 8. A chain 11 passes around the rollers in grooves 10, dipping into an oil vessel 4.
Patent GB-603163-A (GB)
Title: Improvements in self-energizing brake for vehicles
IPC: F16D51/58
Filed: 1945-05-28
Abstract: 603,163. Brakes. FARKAS, P. May 28, 1945, No. 13287. Convention date, Nov. 18, 1942. [Class 103 (i)] In an internally-expanding brake, wherein the shoes anchor on an abutment 25, the expanding means exert an oblique upward force on the upper end of the shoe 22 to increase the local pressure between that end of the shoe and the drum, and an oblique downward force on the adjacent end of the other shoe 23 to lessen the pressure at the point. As shown, the effect is produced by floating toggle levers 29, 30, the link 30 being inclined to exert pressure along the line r, the force being applied to the shoe 23 by the short arm of the toggle 29 in the direction of the line u. The shoes 22, 23 may be in halves articulated at 40, 41 and the thrust of the shoe 22 is transmitted to the shoe 23 through the wear-adjustment means. The link 30 comprises spaced parallel plates which engage a washer 31 on a stationary pin 32 to be guided thereby. The lever 29 is actuated by a member 28 on the brake cable. In a modification, the toggle mechanism is replaced by an inclined hydraulic actuator, pivoted to the shoe 22 at 35 and resting on an arm pivoted to the shoe 23 and having a positioning stop, whereby it acts as a bracket.