baber/WOPTO huggingface dataset:
Patent GB-681813-A (GB)
Title: Improvements in or relating to electric valve converting systems
IPC: B23K11/24
Filed: 1949-05-13
Abstract: 681,813. Converting; supply systems for resistance welders. SOLOMON, J. L. May 13, 1949 [June 22, 1948], No. 12816/49. Classes 38 (ii) and 38 (iv). In a welding current supply system of the kind in which the electrodes are fed from a single secondary winding 23 of a transformer 10 having primary windings 11-13 supplied from a polyphase source L1-L3 through ignitrons, preferably arranged in back-to-back pairs 30, 31; 50, 51 and 70, 71, and in which a gridcontrolled firing valve, such as 34, is provided for each ignitron, the cathode circuits of all the firing valves have a common point A, the grid circuits of those valves intended to fire on, say, the positive half-cycles of the supply voltage have a common point B and the grid circuits of the valves intended to fire on the negative half-cycles have a common point C, so that D.C. switching potentials for controlling the firing of the valves may be applied between the points A, B and A, C. To avoid shortcircuiting of the welding transformer windings by the connecting together of the cathodes, the connection is effected through transformers 93, 96, 99 having high impedance primary windings and provided with secondary windings, such as 101, 111, which inject into the grid circuits of the valve A.C. voltages compensating similar voltages which are unavoidably introduced into the cathode circuits by the primary windingsthe primary windings of any two transformers are directly in series across two of the supply lines L1-L3. Each primary winding of the welding transformer comprises three sections, such as 14-16, connected in series, the central section 15 being split to allow connection therein of the associated ignitrons and firing valves. To prevent D.C. potential changes between the common cathode and grid points (and consequent loss of control by the firing circuits) due to the rectifying action of a conducting ignitron, the grid points B, C are connected to the D.C. switching potential control system through windings 116, 118 of a compensating transformer 112, the primary winding of which receives the D.C. voltage appearing across the sections 14, 15 of the welding transformer. The D.C. switching potential control system may comprise a battery 120 associated with potentiometers 121, 124-126 and contactors 127- 129. When the contactors are open, as shown, the battery applies negative bias to points B and C (relative to A) and all the valves are held off. Closure of 129 and 128 causes one valve and its associated ignitron in each primary winding of the welding transformer to conduct to provide a unidirectional flow of welding current. The direction of flow may be reversed by opening 128 and closing 127, when the other valve and ignitron of each pair will conduct. Instead of a mechanical switching system, the fully electronic timed switching system described in Specification 681,819 may be employed. Specification 654,583 also is referred to.
Patent GB-153928-A (GB)
Title: Improvements in pneumatic actions for automatic musical instruments, piano-players, and the like
Filed: 1919-05-21
Abstract: 153,928. Dodds, E. H. May 21, 1919. Actions.-A pneumatic action, Fig. 1, comprises a valve casing 1 having two of its sides closed by an L-shaped cover-plate 2 having air and exhaust ports 4, 3 respectively, adapted to be closed alternately by a single double-acting valve 5 pivoted at the angle of the cover-plate. The pivot pins may engage the side walls of the casing to prevent lateral displacement of the valve. The vertical valve-face is actuated through a tappet-rod 14 by a diaphragm chamber 12 connected to the tracker-bar. Each action is secured to a wind-chest 10 by brackets. Tn a modification, Fig. 6, the valve-arms 20, 21 are of flexible material backed by rigid plates 22, 23; the plate 23 carries a curved screw 25<a> on which is mounted a nut 26 engaging the plate 22; in another modification the arms 20, 21 are rigid and are pivoted independently to the cover-plate.
Patent GB-1384078-A (GB)
Title: Process and apparatus for achieving the mechanical trenching of a  pipe-line in a sub-aqueous depth
IPC: E02F5/10
Filed: 1972-03-20
Abstract: 1384078 Laying pipes G FALDI 20 March 1972 12850/72 Heading F2P [Also in Division E1] A trench for a pipe-line 1 laid on a bed, more especially a sub-aqueous bed, is formed by dredging means mounted on either side of a frame 2 which straddles the pipe-line and is guided thereon by rollers 14, 15 as it is hauled along by a cable 16. The rollers may be spring- loaded or subject to control from the towing barge &c. to enable them to pass pipe flanges &c. Each dredging device comprises a shovel with a toothed leading edge 8 and a suction pipe 12 leading to a pump casing 4 which has suction and delivery valves controlled by compressed air delivered to a conduit 6, and a discharge conduit 7 for mud &c. An inclined grill 17 exlcudes large stones from the suction pipe 12 and deflects them outwardly. One or two knives or ploughs movable into position beneath the pipe-line by mechanical, compressed air, or hydraulic &c. means may be fitted to displace material outwardly where it can be removed by the shovels during a second pass. Alternatively, a single plough connected to a third pump casing may be provided, in which case the arrangement may be such as to form a trench of asymmetrical cross-section. In a modification, an additional pair of shovels with associated pump casings remove material displaced outwardly from beneath the pipe-line by a pair of ploughs. Instead of ploughs, other disintegrating means such as revolving helical blades or high-pressure water or air jets may be used.
Patent GB-806914-A (GB)
Title: Manufacture of basic ketones
IPC: C07D213/50
Filed: 1955-05-03
Abstract: Ketones of the formula <FORM:0806914/IV (b)/1> (wherein R1 is a phenyl, chlorophenyl, tolyl or methoxyphenyl, R2 is a heterocyclic radical, R3 is hydrogen or lower alkyl, R4 is lower alkyl and R5 and R6 are each lower alkyl or together with the nitrogen atom form a saturated heterocyclic radical, the lower alkyl radicals containing at most 4 carbon atoms) are prepared by reacting a compound of the formula <FORM:0806914/IV (b)/2> with a strongly basic alkali metal compound, e.g. a hydride, amide or hydrocarbon compound of an alkali metal, and then condensing the alkali metal compound so obtained with an ester (the ester group containing at most 6 carbon atoms) or a halide of the acid R4COOH.  In examples: (1) sodium in ether is added to 1 - phenyl - 1 - pyridyl - (21) - 3 - dimethylaminopropane in chlorobenzene, the mixture is boiled, ethyl propionate is added and the mixture is again boiled to give, on working up, 1 - dimethylamino - 3 - phenyl - 3 - pyridyl - (21)-hexanone-(4), the maleate of which is also described; (2) 1-phenyl-1-pyridyl-(41)-3-dimethylaminopropane is boiled with sodamide in toluene, propionyl chloride is added and the mixture is heated at 95 DEG  C. to give, on working up, 1 - dimethylamino - 3 - phenyl - 3 - pyridyl - (41)-hexanone-4, the maleate of which is also described. Reference is also made to other starting materials and products in which R1 has the additional values of p-methoxyphenyl, p-and o-chlorophenyl and p-tolyl, R2 the additional values of thiazolyl-(2), quinolyl-(2), quinolyl-(4), pyrimidinyl-(2) and benziminazolyl, R3 the additional values of methyl, ethyl, propyl and butyl, R5 and R6 the additional values of ethyl, propyl and butyl or, together with the nitrogen atom, of piperidino, pyrrolidino, morpholino and piperazino and R4 the additional values of methyl and isopropyl.  A list of further salt forming organic and inorganic acids is also given.
Patent GB-129487-A (GB)
Title: Improvements in Measuring and Controlling Electric Power.
Filed: 1918-08-08
Abstract: 129,487. British Thomson - Houston Co., (General Electric Co.). Aug. 8, 1918. Power meters; measuring supplics from several sources.-The total power supplied from a number of stations is measured by means of a pilot circuit having a branch at each station, in each of which branches a current is maintained having a definite relation to the power supplied by the station. Fig. 1 shows one arrangement, in which a pilot circuit 7 has branches 14, 15 at stations A, B supplying power from supply mains 5, 6 to distribution circuits 1, 2. The pilot circuit 7 contains a generator 11, ammeter 9, quantity meter 10, and optionally boosters 12, 13 to maintain a uniform pressure across the branch circuits 14, 15. Each branch circuit 14, 15 contains a generator 16, 17 and a variable resistance 18, 19, which is varied by windings 36, 37 controlled by a relay. The movable contact 33 of the relay is controlled by the opposing torques exerted by two Kelvin balances 22, 23, of which torques the former is a function of the power supplied by the station A and the latter is a function of the current in the branch circuit 14. Permanent magnets may be substituted for the stationary coils of the Kelvin balance 23. The resistance 18 may be in the field circuit of the generator 16, and may be operated by a reversible motor. The Kelvin balances may be replaced by electrodynamometers. Either the generator 11 or the generators 16, 17 may be omitted or batteries substituted therefor. When the supply at the stations A, B is through rotary converters, the current in the branch circuits 14, 15 may be derived from the direct-current side of these.
Patent GB-436971-A (GB)
Title: Improvements in and relating to electric control systems
IPC: G05F1/34
Filed: 1934-04-28
Abstract: 436,971. Control systems for consuming devices. BRITISH THOMSON - HOUSTON CO., Ltd., Crown House, Aldwych, London. April 28, 1934, No. 12880. Convention date, April 29, 1933. Addition to 433,162. [Class 38 (iv)] The transformer which is in series with the magnetically controlled reactor 17, of the parent Specification is modified by the provision of a control winding connected to the reactive winding of reactor 17 so that the impedances of the reactor 17 and transformer vary inversely. The transformer may be an anti-transformer or reactor 18. The voltage across a load 10 is controlled by connecting the load in series with a saturable reactor 13 and an auto-transformer 14 to A.C. supply, the saturating winding 13<b> of the choke 13 being supplied with rectified A.C. from across a saturable choke or auto-transformer 18 in series with a second saturable choke 17 across the supply, the impedance of the choke 18 being made to vary inversely with that of the choke 17 by connecting its saturating winding 18b through a rectifier 20 across the choke 17 which is adjustable by control of current in its saturating winding 17b. The winding 17<b> is supplied with half-wave rectified current through a grid-controlled rectifying valve 21, the grid potential of which is obtained from across a resistance 27 and condenser 26 connected through a half wave rectifier 25 across a choke 23 which is in series with a second choke 22 across the supply. The impedances of the chokes 22, 23 are inversely variable by movement of a common core controlled by a handle, movement of which thereby effects variation in the voltage across the load 10 through the resulting variation in the impedances of the chokes 17, 18 and 13. In order to maintain the load voltage at a fixed proportion of that across the choke 23, it is fed back through a transformer 28 and half-wave rectifier 25 to a resistance 31 in the grid circuit of the valve 21. The transformer 14 ensures that the arrangement is capable of supplying 100 per cent of the supply voltage to the load 10.
Patent GB-164944-A (GB)
Title: Improvements in spring frames for motor cycles
IPC: B62K25/28
Filed: 1920-05-10
Abstract: 164,944. Norton, E. J. May 10, 1920. Bicycles; spring devices. - In a motor-cycle frame of the type in which the rear-wheel forks are resiliently supported by a single cantilever spring H, the spring is anchored to a pivoted platform located between duplicated members D, F, its rear end is connected to a yoke L pivoted to the forks N, and its front end is connected to a shackle J carried by the members F. The seatpillar socket C is formed on a member A.
Patent GB-206536-A (GB)
Title: An improved process for the removal of nut kernels from their shells
IPC: A01F11/08
Filed: 1922-05-08
Abstract: 206,536. Moseley, L. H., Dyke, F. M., and Lever Bros., Ltd. May 8, 1922. Wet-separating. -Palm-oil nuts are cracked and the kernels and shells are separated in a clay mixture in which the kernels float and the shells sink. Specification 10485/14, [Class 59, Grinding, crushing, &c.], is referred to.
Patent GB-821971-A (GB)
Title: Polymeric material
IPC: C08F4/70
Filed: 1957-04-23
Abstract: Polymeric materials are made by polymerizing at least one monomer containing at least one polymerizable ethylenic and/or acetylenic linkage under substantially anhydrous conditions in the presence of a preformed polymer with the aid of a catalyst comprising an organo-metallic compound and one or more of the following: a modifying polar compound, a Friedel-Crafts compound and a carrier component.  Suitable monomers, of which numerous specific examples are given, are dienes, trienes, unsaturated aromatic hydrocarbons, aliphatic olefines, halogen substituted olefines, acrylic acid derivatives and acetylenes.  Suitable preformed polymers, of which numerous examples are given, are natural and synthetic rubbers, polymers of dienes, unsaturated aromatic compounds and aliphatic olefines and the polymers disclosed in Specification 799,043.  The organo-metallic compounds used are those derived from metals of Groups I, II, III and IV of the periodic table and the rare earth metals.  The modifying polar compounds used are complex-forming organic compounds containing oxygen and/or nitrogen and/or sulphur and/or selenium and/or tellurium and/or halogens and preferably containing less than 32 carbon atoms.  The Friedel-Crafts compounds used are the halides, oxyhalides and halide complexes with halogen acids of copper, magnesium, zinc, cadmium, mercury, boron, aluminium, gallium, titanium, zirconium, tin, lead, vanadium, niobium, tantalum, antimony, bismuth, chromium, molybdenum, tungsten, uranium, tellurium, manganese, iron, cobalt, and nickel.  The carrier component may be any organic or inorganic solid which is not detrimental to the polymerization.  The polymeric materials produced may be freed of metal by treating with a compound containing active hydrogen or may be treated to introduce polar substituents with compounds such as carbon dioxide, cyanogen, cyanogen chlorides, acid chlorides, chloramine, phosgene, phosphorus trichloride, sulphur chloride and thienyl chloride. Treatment of the polymeric materials with organo-metallic compounds increases their metal content.
Patent GB-768697-A (GB)
Title: Improvements in stockings
IPC: D04B11/28
Filed: 1954-05-04
Abstract: 768,697. Knitting. LIHN, M. M. May 4, 1954 [Dec. 28, 1953], No. 12962/54. Class 74(2). By arranging that the narrowing points at each side of a full fashioning machine never overlap the needle line by more than four points, the flare narrowing for the area 221, and leg narrowings, for the area 23<SP>1</SP>, are so positioned as to be buried in the back seam 25 of the stock. ing. The leg narrowings extend from the top of the calf to or below the narrowest portion 23<SP>3</SP> of the ankle and are uniformly distributed along the seam. The extent to which the outer narrowing points 36 overlap the needle is reduced to the required extent by eliminating points either from the inner ends of the outer narrowing fingers 34, Fig. 6, or from their outer ends, Fig. 8, the outer parts of brackets 37 carrying the points which are eliminated being (in this latter construction) cut away, the brackets re-positioned on the narrowing rods 40, 41, the usual collar between the opposed threads of the narrowing spindle omitted (so that the nuts can be brought closer together) and the narrowing rolls suitably shortened. In toe narrowing, the inner narrowing fingers 32 are used in addition, in order to compensate for the points removed from the outer narrowing fingers.
Patent GB-786581-A (GB)
Title: Improvements in or relating to electro-mechanical servo-devices
Inventor: GREENHALF WILLIAM DOUGLAS GEOR
IPC: G05D3/12
Filed: 1955-05-04
Abstract: 786,581. Reversing gearing; clutches. AIR TRAINERS LINK, Ltd., [formerly AIR TRAINERS, Ltd.]. April 25, 1956 [May 4, 1955], No. 12990/55. Class 80 (2). In reversing gearing comprising selectivelyenergized electromagnetic oppositely-rotating driving members and an interposed driven armature member, the latter comprises a pair of axially-spaced discs A<SP>2</SP> secured to a distancepiece A<SP>1</SP> and disposed closely adjacent to the driving members, whereby the two driving systems are kept magnetically separate. The thin discs A<SP>2</SP> of beryllium copper have riveted to their outer faces, thin annuli of magnetic alloy and, near the centre, have arcuate overlapping slots to render them axially flexible. The distance-piece A<SP>1</SP> is secured to the driven shaft A, which may be geared to the tachometer generator L and to the potentiometer M of an electrical analogue computer system. Each driving member comprises concentric sleeves F<SP>1</SP>, F<SP>2</SP> of magnetic material attached to an interposed brass ring F<SP>3</SP> faced with friction material, the sleeves F<SP>2</SP> being journalled on shaft A while the sleeves F<SP>1</SP> have teeth engaged respectively by a gear G<SP>1</SP> on a driving shaft H and by a meshing gear on a countershaft. The electromagnets are stationary, and each comprises an annular coil C between the cylindrical walls B<SP>1</SP>, B<SP>2</SP> of a fixed member B in which shaft A is journalled, the walls B<SP>1</SP>, B2 being closely embraced by the sleeves F<SP>1</SP>, F<SP>2</SP>.
Patent GB-674468-A (GB)
Title: Improvements in or relating to gas-filters of the oil-bath type
IPC: F02M35/026
Filed: 1950-05-24
Abstract: 674,468. Gas filters. AIR-MAZE CORPORATION. May 24, 1950 [July 28, 1949], No. 13001/50. Class 8 (ii) A liquid bath gas filter comprises a vertical cylindrical casing having a side outlet 17 near the top, foraminous filter material 18, 23 in the annular space formed by the casing wall and an axial inlet 16 delivering dust-laden gas adjacent to and above the indicated level A of oil, and a generally imperforate double cup member 30 comprising a small cup, integral and co-axial with and located below a larger cup which terminates in a vertical cylindrical lip 30d spaced radially from the mouth 21b of the inlet 16 ; one of said cups e.g., the larger one having openings 30e and upwardly and outwardly extending baffles 30f. The filter material 18, 23 may be of corrugated wire-mesh strip wound spirally, or may comprise co-axial cylinders having the corrugations angularly disposed to prevent nesting. The casing comprises upper and lower members 14, 20 detachably secured together by a clamp 24, and the cup 30 rests on a shoulder 12c of the oil bath 12, which is in turn secured to the casing 20 by clamps 26. In operation a flange 21c provides a first quiescent zone 37, and a coarse screen 33 provides a second quiescent zone 38 outwardly of the lip 30d. The oil level drops from A to B in the small cup, is raised to C in a space 35 outwardly of a skirt 32 and of the lip 30d and falls to D in a space 36 within the skirt 32. In a modification the openings 30e are located in the bottom of the smaller cup and the skirt 32 is eliminated,
Patent GB-1033504-A (GB)
Title: Improvements in ignition systems
IPC: F02P3/08
Filed: 1963-04-02
Abstract: 1,033,504. Ignition systems. ROBERT BOSCH G.m.b.H. April 2, 1963 [April 7, 1962], No. 13014/63. Heading FIB. In an ignition system a condenser 15 is connected to be charged through a rectifier 68 from the secondary winding 53 of a transformer whose primary winding 52 is connected in series with a transistor 50 to a pair of current supply leads for connection to a direct current source, the transformer having a third winding 51 which is connected into the emitter base circuit of the transistor and which serves to keep the transistor in an unstable conductive state until a magnetic field sufficient for charging the condenser has built up in the transformer but then allows the transistor to return to its stable blocked state. Means are provided for initiating the unstable conductive state of the transistor in synchronism with the engine. As shown the third winding of the transformer is connected in series with a control winding 44 of a control ignition coil whose primary winding 43 can be connected to the direct current source by means of an interrupter 22 driven by the engine. When the interrupter is opened a control voltage which initiates the conductive state of the transistor 50 is induced in the control winding 44. Simultaneously with this control voltage a high positive voltage is induced in the secondary winding 40 of the control ignition coil. Owing to this voltage a control spark can jump across the gap between the firing electrode 38 and the electrode 37. This spark ionises the spark path from the electrode 36 to the electrode 37. The condensor can then discharge through this ionised path. The two windings 51 and 52 are connected together through a resistive member 66 which functions in dependence upon voltage for example a Zener diode, a germanium diode 55 having a non-linear current voltage characteristic leads to the emitter of the transistor 50. A simplified circuit is described.
Patent GB-676368-A (GB)
Title: Improvements in or relating to rocket missiles
IPC: F42B10/30
Filed: 1949-05-16
Abstract: 676,368. Rocket propulsion. BRODEN, E. W., NORDSTROM, S. H., and NORDSTROM, I. T. M. May 16, 1949. [May 18, 1948] No. 13016/49. Class 9 (ii). A rocket 1 has a combustion chamber 2 from which the gases produced on combustion of the propellant are exhausted through a Laval nozzle 3. Between the chamber 2 and the nozzle is placed a ring 4 provided with inclined vanes and within the ring is a streamlined body 5. Thus the ring 4 combined with the body 5 form a turbine wheel fixed in the projectile so that the gases are deflected and cause the projectile to rotate. In a modification the ring 4 and the body 5 are placed within the nozzle exit. The outer ends of the inclined vanes are attached to the inside wall of the nozzle or combustion chamber as by welding or by fixing in splines.
Patent GB-738426-A (GB)
Title: Improved device for suspension of electric cables and the like
IPC: H02G7/05
Filed: 1953-05-11
Abstract: 738,426. Hooks. L'ELECTRO-VERRE. May 11, 1953 [June 25, 1952], No. 13117/53. Class 89(2). [Also in Group XXXVI] A device for connecting a cable to a support comprises a member 1 having means (not shown) for securing the cable thereto and means for connecting the member 1 to the support, the connecting means including a hook and an eye dimensioned so that they can be engaged or disengaged only by two successive differently directed movements. The top of member 1 is formed into a hook 2 having an enlarged end 24 over which the eye 25 will pass when one of its limbs 20 or 21 is passed through the hook opening D. When the eye 25 reaches point C the width l of the hook is less than the width e of the eye, so that the eye can be turned through 90 degrees to enable it to pass along hook 2 to point A, where the thickness h of the hook is greater than e, preventing the eye rotating about this point.