baber/WOPTO huggingface dataset:
Patent GB-532302-A (GB)
Title: Electric wave translation systems
IPC: H03F1/36
Filed: 1939-08-25
Abstract: 532,302. Valve amplifying circuits. STANDARD TELEPHONES & CABLES, Ltd. Aug. 25,1939, No. 24509. Convention date, Oct. 7, 1938. [Class 40 (v)] An amplifying circuit comprising two stages in cascade has a positive feed-back path a provided round the first stage 1, and a negative feed-back path b round the whole of the second stage 2 and the whole or part of the first stage 1, as indicated in Fig. 1. The negative feed-back ratio is sufficient to prevent self-oscillation and is substantially greater' than unity, while the positive feed-back ratio is approximately unity. The vector sum of the two ratios is greater than zero in absolute magnitude in the frequency band where distortion is undesirable, and the graph obtained by plotting its real part against its imaginary part for all frequencies does not encircle or pass through the point 1, 0. In the three-valve circuit shown in Fig. 2, positive feed-back is provided by the impedance Za in the anode circuit of the second valve 2, and negative feed-back by an impedance Zb in the anode circuit of the third valve 3, both impedances being in series in the input circuit of the first valve 1. Other methods of obtaining the feedbacks may be employed ; for example positive feed-back may be given by connecting the anode of the valve 2 to the grid of the valve 1 through a resistance 50, Fig. 5, and negative feed-back by including a portion 56 of the anode resistance of the valve 3 in the input circuit of the valve 1. Positive feed-back may also be obtained by an inductive coupling of the anode circuit of the valve 1 to its grid circuit, Fig. 6 (not shown). The positive feed-back stage may be divided into two sub-stages in cascade each having its own feed-back loop, and the negative feed-back circuit then includes the whole of the second sub-stage and at least a part of the first. Particular distortion frequencies, such as harmonics in a radio transmitter, may be eliminated by arranging that the two feed-back ratios are respectively unity at these distortion frequencies. More than two sub-stages may be provided. In a modification the positive feed-back stage is replaced by a stage with negative resistance. With this object one of the amplifying valves may be operated as a secondary-emission negative resistance ; or the load impedance of one of the valves may comprise a negative resistance, Specifications 371,130, [Class 99 (ii)], 498,186, and 514,567, and U.S.A. Specification 2,102,671 are referred to.
Patent GB-382362-A (GB)
Title: Locks for hinged doors of vehicles
IPC: E05B65/20
Filed: 1931-09-02
Abstract: 382,362. Door fastenings ; holders and stops. RILEY, A. and RUSH, H., Aldbourne Works, Widdrington Road, Coventry. Sept. 2, 1931, No. 24643. [Classes 44 and 65 (i).] A safety-catch for a motor-car door consists of a bolt 5 which engages with a single tooth or one of a series of teeth 9 on the running board. The bolt may be withdrawn by the same handle as the ordinary door latch. A positive catch 3, Fig. 3, may be used to hold the door in a partly open position.
Patent GB-727711-A (GB)
Title: Improvements in or relating to circuits for generating currents of sawtooth wave-form
IPC: H03K4/28
Filed: 1953-09-07
Abstract: 727,711. Sawtooth generating circuits. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Sept. 7, 1953 (Sept. 10, 1952], No. 24680/63. Class 40 (6). In a sawtooth current generator of the seriesbooster damper type and in which the damping valve is coupled to the driving valve through a transformer, the transformer winding 16 to which the damping valve is connected is in parallel with the primary winding of a second transformer 22, the secondary of which feeds an output coil 9 (e.g. a deflection coil), the parallel connected windings being provided on separate parts of a core which is common to the two transformers. By this means the ringing currents initiated during the fly-back are reduced. These currents may be further reduced by arranging that the voltages across the upper and lower parts of the second transformer have the inverse ratio to that of the effective capacitances across the parts. The transformers need not be of the auto-transformer type and the damping diode shown may be replaced by a valve having a control grid.
Patent GB-472090-A (GB)
Title: Improvements in carburettors
IPC: F02M1/10
Filed: 1936-09-10
Abstract: 472,090. Spray carburetters. TRIGGS. W. W. (Carter Carburetor Corporation) Sept. 10, 1936, No. 24688. [Class 7 (iii)] The choke valve in the air inlet is opened by the suction on the engine side of the; mixture throttle valve against the action of a heat-responsive device. The suction acts on a piston which is connected to the choke valve and mounted in a cylinder and the effect of the suction on the piston is varied in accordance with the position of the piston. In the downdraught carburetter shown, the suction in the intake manifold 3, Fig. 2, is transmitted through a pipe 53 and acts upon a disc-shaped piston 45 which, through a curved connecting rod 46 and a lever 44, opens an eccentrically mounted air inlet valve 30 against the action of a bimetallic coil 54, Fig. 3. The coil is carried by a removable part of a housing 42 which is lined with cork or heat insulating material 43 and one end of the coil is provided with a hook which engages a pin 58 projecting from the lever 44. To provide an uneven suction effect on the piston, grooves 48 of irregular contour are provided on opposite sides of the cylinder 47 in which the piston operates. While the valve is being opened, the suction in the manifold draws air heated in a stove 50 on the exhaust manifold 4 through the housing 42 to heat the coil 54. When the valve is fully open the piston closes the grooves 48 to restrict the flow of hot air through the cylinder 47 and prevent overheating of the coil. To produce a fluttering action of the air inlet valve 30 during cranking, an armature 61 on the lever 44 is held in contact with a weak magnet 59 until the suction is sufficient to open the valve against the action of the magnet and bimetallic coil. When the engine stops, a spring 19, Fig. 1, opens the throttle valve 5 slightly. When the air inlet valve is closed a lug 40, connected by a link 35 to an arm 33 on the shaft of the valve 30, engages with a lug 41, on a rocker arm 27 operated by the throttle valve 5 and prevents the throttle closing. As the choke valve opens, the suction in the manifold acting on a diaphragm 14 closes the throttle valve. If the engine fails to start, the throttle 5 is opened manually and a pin 29 on a link 26 opens the choke valve to relieve the cylinders of excess fuel. The throttle valve operates a metering valve 12 to control the amount of fuel passing to the nozzle 10 which discharges into the smallest of a series of Venturi tubes 13.
Patent GB-472354-A (GB)
Title: Process for the production of valuable, in particular high boiling hydrocarbons from solid carbonaceous materials by destructive hydrogenation
IPC: C10G1/06
Filed: 1936-09-11
Abstract: Hydrocarbons of high boiling point are produced by the destructive hydrogenation of solid carbonaceous materials in a continuous process by making the solid materials into a paste with an oil having an upper boiling point of 300 DEG  C., destructively hydrogenating the paste, separating the products, and recycling the residues containing unconverted coal, ash, &c., to the initial material, either in the preheater or in the reaction chamber. Finely ground brown coal neutralized with sulphuric acid and soaked with a solution of ammonium molybdate is pasted with a middle oil obtained from bituminous coal.  The mixture together with two parts of residual product taken from a hot catch pot placed behind the reaction vessel is heated with hydrogen under pressure of 300 atmos. to 370 DEG  C., in a tubular preheater and then passed into a reaction chamber of greater diameter than the tubes of the preheater.  The products pass into the separator maintained at 370 DEG  C., from which vaporous constituents are withdrawn while the residual materials are recycled in part to the preheater.  The vapours are condensed in a cold catch pot where they are mixed with the remainder of the residual materials and centrifuged.  The centrifuged oil is separated into a middle oil used for pasting fresh coal and a residue which is returned to the centrifuge.  The sludge from the centrifuge is carbonized. Specification 359,108 is referred to.
Patent GB-622938-A (GB)
Title: Apparatus for forging work pieces with large variations of cross-section
IPC: B21K1/06
Filed: 1946-08-20
Abstract: 622,938. Forging-machines; dies. COMPAGNIE DES FORGES ET ACIERIES DE LA MARINE & D'HOMECOURT. Aug. 20, 1946, No. 24747. Convention date, Dec. 7, 1944. [Class 83 (iv)] Making crank shafts.-Apparatus for forging articles such as crank shafts comprising enlarged parts separated by constrictions, comprises end dies to receive the extremities of the blank and two central half-dies acting transversely for the lateral displacement of part of the blank, the end dies being moved together during the downward movement of the central die by means of ramps associated with the central die and engaging ramps associated with each of the end dies. The apparatus comprises a bed 1 with guideways along which may move cradles 3 supporting the lower halves. of dies 9 adapted to hold the work at each side of the portion to be forged. The bed also comprises a central cylinder in which operates a piston 4 carrying the lower part 10 of a central die, the upper part 11 of which is carried by a crosshead 2 adapted to be moved downwardly by a ram. Pistons 5 operating in the crosshead serve to force the upper parts of the workholding dies 9 into contact with the work, the pressure in the cylinders being limited by spring-controlled exhaust valvos. In operation, and starting from the position shown in Fig. 1, pressure fluid is admitted to the cylinders of the pistons 5 so that the work is firmly gripped by the dies 9. The cross-head is then moved downwardly so that ramps 17 depending from each side thereof engage corresponding ramps 16 formed on the outer ends of each of the workholding dies. Thus as the portion of the work gripped between the dies 10 and 11 is moved bodily downwards against the pressure of the cushioning piston 4, the dies 9 are moved together. After the forging operation and the withdrawal of the ram pressure from the crosshead, the parts are returned to their original positions by other fluid actuated pistons such as the pistons 8 serving to raise the cross-head.
Patent GB-1398984-A (GB)
Title: Apparatus for continuously moving a web through reciprocating web feeding means
IPC: B65B41/14
Filed: 1972-05-25
Abstract: 1398984 Feeding webs; packages R A JONES & CO Inc 25 May 1972 [27 May 1971] 24797/72 Headings B8R and B8C A pair of alternating, reciprocating clamps 41, 42 feed a web continuously along a path 22 through a machine, e.g. a blister packaging machine, by alternately engaging the edges of the web during their forward strokes and transferring engagement back and forth between the clamps whilst they are moving forwardly at the same velocity. The packaging machine includes web heating and web forming means 31, 32, blister loading means 33 and laminating and trimming means 34, 35, the means 31, 32, 34 and 35 being mounted on heads 73, 74 vertically reciprocable towards and away from each other, so as to move the means between operative and inoperative positions, by linkages 97, 91, 105, 107 controlled by a cam 100 and torsion bars 121. Alternatively, electric, hydraulic or pneumatic motors may be used. The heads 73, 74 reciprocate upon machine head assemblies 71, 72 which have the configuration of parallelograms and are horizontally reciprocated out of phase and with an adjustable stroke via linkages 92, 93 controlled by a cam (96), Fig. 8 (not shown), coaxial with the cam 100. The clamp 41 is pivoted to the machine head assembly 72 and is slidably supported by the clamp 42 which is pivoted to the assembly 71. The clamps extend longitudinally of the web feed path 22 and each, e.g. clamp 42, includes a spring finger (65), Fig. 4 (not shown), movable into clamping engagement against a fixed finger (63) by an inflatable elastic hose (67) operable by a cam (not shown). The cams are such that the reciprocating clamps engage the web edge alternately but, due to overlap of their forward strokes, continuous web advance is achieved. The means 31, 32, 34, 35 are moved into operative positions to work on the moving web whilst moving in synchronism therewith. Lamination is effected by a roller or stamp means. The resultant packages are cut from the web and may be scored for folding.
Patent GB-798753-A (GB)
Title: Remote control of engine driven welding generators
Inventor: AUSTIN HORACE EDGAR
IPC: B23K9/10
Filed: 1955-08-30
Abstract: 798,753. Supply systems for welding arcs. BRITISH OXYGEN CO., Ltd. Aug. 30, 1956 [Aug. 30, 1955J, No. 24833/55. Class 38 (4). A welding generator 3 driven by a prime mover 5 is arranged so that its speed is increased from idling immediately prior to a welding operation by a manually operated switch 13 controlling solenoid 10 supplied by a battery 11 acting on the throttle linkage 6, 8, 9. Switch 13 may be mounted on the electrode holder 1, or on the welder's protective screen; or it may be unmounted, but positioned within easy reach of the welder.
Patent GB-654602-A (GB)
Title: Photographic roll film developing tank
IPC: G03D13/04
Filed: 1948-09-23
Abstract: 654,602. Photographic developing apparatus. STWOLINSKI, H., VON. Sept. 23, 1948, No. 24889. Convention date, Nov. 25, 1946. [Class 98 (ii)] A roll-film developing tank of the kind wherein a spool for supporting the film during development is rotatably mounted on the tank bottom and on a removable tank cover in an upright position, the tank being light-tight and the spool being completely immersed in the developer and capable of being lifted out of the tank, is characterized by the feature that several spools are rotatably mounted in a common completely light-tight tank chamber and are coupled together for rotation by a single turning knob passing through the tank cover in such a way as to exclude light, each spool carrying at least one roll of film and being capable of being lifted out of the tank independently of the other spools. As shown, the tank 1 of metal or plastic has formed integrally therewith three stub axles 2 for the developing spools 5 and a fourth stub axle for the drive. Each spool 5 has a hollow core 6 and upper and lower flanges 7 and 8, the outer portions of the lower flanges being machined into toothed wheels 9 meshing with a pinion 11 on the driving shaft 10. The top end of the shaft 10 has a groove engaging with a rib on the bottom of the stub axle of a turning knob journalled in the lid of the tank. In a modification, the toothed wheels 9 may be on the top flanges of the spools, and the driving pinion 11 may be on the end of a stub axle axially shiftable in the cover, the other end of the stub axle carrying the turning knob. The outer surface of the tank may be shaped to conform with the inner surface. The stub axles for the spools may be made separately from the tank. In a further modification, the turning knob may drive one of the spools, and the bearing for the knob may form a funnel for introducing the developer. More than three developing spools may be used, and by using warty separator bands more than one film can be wound on one spool. The Specification as open to inspection under Sect. 91 states also that the stub axles for the spools may be dispensed with and the spool flanges may bear directly on the inner casing. This subject-matter does not appear in the Specification as accepted.
Patent GB-948117-A (GB)
Title: Preparation of o, o-dimethyl dithiophosphoryl-acetic acidmonomethyl amide
IPC: A01N57/12
Filed: 1962-06-28
Abstract: 948,117. O, O-dimethyldithiophosphoryl-acetic acid monomethyl amide and intermediate therefor. BOEHRINGER INGELHEIM Ltd. June 28, 1962 [July 3, 1961], No. 24932/62. Heading C2C. O, O-dimethyl-dithiophosphoryl-acetic acid monomethyl amide ((CH 3  O) 2  P ( S ) SCH 2  CONHCH 3 ) is obtained by reacting bis-(O, O- dimethyldithiophosphoryl acetic acid glycol ester with methylamine at below 30C. The methylamine is suitably used in the form of an aqueous solution or the reaction can be carried out in an alcoholic or aqueous alcoholic solution, the alcohol being preferably methanol. Bis (O, O-dimethyldithiophosphoryl acetic acid glycol ester may be obtained by reacting an aqueous solution of sodium dimethyldithiophosphate with bis-chloroacetic acid glycol ester or by esterification of dimethyldithiophosphoryl acetic acid with glycol in toluene in the presence of a catalyst, e.g. toluene sulphonic acid.
Patent GB-1183586-A (GB)
Title: Indexing Head for a Machine Tool
Inventor: SHOTTER DOUGLAS RALPH
IPC: B23Q3/155
Filed: 1966-06-04
Abstract: 1,183,586. Tool-changing. ALFRED HERBERT Ltd. 2 June, 1967 [4 June, 1966], No. 24985/66. Headings B3B, B3K and B3T. In a machine tool a head 10, Figs. 1 and 3, comprises two tool spindles 17, 18 in a unit 14 which can be indexed to bring one spindle to an operative position and the other to a toolchanging position, axially-disengageable clutch means 20, 21 holding the unit in position relatively to a body part and radially-disengageable driving means 27, 28 for each spindle in the operative position. The head 10 is adjustable vertically on a column 13 carrying a belt or drum-type toolchanger. Each spindle carries a gear 27 which, with the spindle in the operative position, meshes with the gear 28 driven at high or low-speed according to the setting of an hydraulicallyoperated sliding gear-change or at a creep speed drive through a slipping clutch. When a spindle is turned to a tool-changing position, a plunger (41) engages a notch 40, Fig. 9, in a disc 39 to position a key 42 for engagement with a new tool. In operation, the work-saddle 12 is moved away from the operative tool and the main input clutch to the change-speed gearing is disengaged. The operative spindle is then driven at a creep speed and a rack 49, Fig. 6, is moved axially to rotate sector gears 45, 46 and position a pawl 38 to enable it to engage a ratchet wheel attached to the gear 28. A rack 24, Fig. 3, is then moved axially to rotate a gear 23 and allow balls 26 to move out of contact with cams 25a and allow a spring 26a to move the shaft 19 of the unit 14 axially, thus disengaging the clutch 20, 21. The axial movement causes engagement of a clutch 51, 52 and disengages gears 28, 55 from the spindle gears 27 which are each held from rotation by a detent 100. The unit 14 is then indexed by movement of a rack 53 engaging a gear 54, and the rack 24 is operated to return the parts to their operative positions. The creep drive is disengaged and the rack 49 is raised to enable the spring 44 to disengage the pawl 38 and to rotate a gear 50. The gear 50 rotates gear 55 through a one-way clutch (56) to rotate the gear 27 in the toolchanging position to position the spindle angularly to receive a tool.
Patent GB-1154401-A (GB)
Title: Method of Cumulative Recording of Intelligence
Inventor: SCHWARTZ MORRIS
IPC: G03C5/08
Filed: 1966-06-06
Abstract: 1,154,401. Cumulative recording of information. KALART CO. Inc. June 6, 1966, No.25119/66. Headings G2A and G2C. Visual information is stored on a record card such as is shown in Fig.2, which is divided into three rows of seven areas each. The information is recorded on each of the areas 10 separately, beginning with the top left-hand area, and adding area by area subsequently, as required. The information is recorded on a particular area photographically, and may be recorded directly (i.e. the card itself may have a light-sensitive layer), or by a transfer process. As each area is used, a hole 19 is punched in the card, to indicate the number of areas used, and as a guide for locating the card in a carriage when the next succeeding area is to be used. Indexing holes 14 and notches 15 along the edges of the card are provided for conventional machine sorting. Holes 17 and notches 18 on the fourth edge serve to indicate the used or unused areas. Such a card is of use when additional items of information have to be recorded at various times. When the card itself is coated with a light-sensitive layer, it may have a protective layer superimposed thereon. In Fig. 10, the card base 80 has a lightsensitive coating 81, over which is a protective layer 82. The latter is notched, as at 83, so that it may be removed in sections corresponding to the area of the light-sensitive layer which it is desired to expose.
Patent GB-1463691-A (GB)
Title: Mosaic printing heads for data printers or the like
IPC: B41J2/295
Filed: 1974-06-07
Abstract: 1463691 Selective printing SIEMENS AG 7 June 1974 [20 Aug 1973] 25300/74 Heading B6F A mosaic print head comprises printing elements 10 actuated by elongate monomorphic piezoelectric transducers 12. The transducers may act directly on the printing elements against spring bias (Fig. 1, not shown) or may act through a fluid 11, the printing elements acting as pistons.
Patent GB-728003-A (GB)
Title: Dehydrochlorination of polychlorocyclohexanes
IPC: C07C17/25
Filed: 1952-10-09
Abstract: Polychlorocyclohexanes, such as crude benzene hexachloride, are dehydrochlorinated by contacting them at a temperature between 180 DEG  and 350 DEG  C. with a catalytic quantity of an alkali metal or alkaline earth metal halide, or an alkali metal or alkaline earth metal compound which will react with hydrogen chloride at the temperature of the reaction to give a halide, the amount of catalyst employed being from 0.01 to 10 per cent of the polychlorocyclohexane. Mixtures of 1,2,4- and 1,2,3-trichlorobenzenes may be obtained having a high proportion of the 1,2,4-isomer.  Examples are given in which crude benzene hexachloride is dehydrochlorinated to produce mixtures of 1,2,4- and 1,2,3-trichlorobenzenes, using barium chloride or sodium chloride as catalysts.  Many other catalysts of this type are specified.
Patent GB-1017039-A (GB)
Title: Assembling device
IPC: B23P19/00
Filed: 1964-06-09
Abstract: 1,017,039. Assembling force fits. W. HAHN, and H. SAUTER, [trading as HAHN & KOLB]. June 19, 1964 [June 22, 1963], No. 25357/64. Heading B3U. An assembling device comprises a housing, a sleeve slidably mounted within the housing, a ram carrier mounted within the sleeve, biasing means acting independently on the sleeve and the ram carrier for urging them in the operating direction during an operating stroke, stops serving to limit the movement of the sleeve which is adapted to receive a guide member for a ram when mounted in the ram carrier, the sleeve and the ram carrier being capable of operation when they are uncoupled, or coupled for part of a stroke, or coupled for a full stroke, and actuating means for driving the ram carrier and the sleeve either together or separately. The sleeve 7 slides in the housing 1 and is acted on by a spring 19 which abuts an adjustable bush 15 screwed in the housing endcap 6. An arm 9 clamped to the sleeve projects through a slot 8 in the housing, and cooperates with an adjustable stop 23 to limit the downward movement of the sleeve due to the spring 19. The sleeve can also be actuated by the moving member 32b of a control means 32. The ram carrier 14 slides in the sleeve and is biased by the spring 20 which also abuts the bush 15. The ram 17 is mounted in the ram carrier and guided by a bush 18 mounted on the sleeve 7. Connected to the ram carrier is a rod 16, which is actuated by cam or hydraulic means, and which permits the ram-carrier to move due to the action of the spring 20 and cause the return movement against the force of the spring. The ram-carrier can be locked to the sleeve by a grub-screw 26, or have limited movement relative to the sleeve by means of a screw 27 threaded in the sleeve which engages a slot 30 in the ram carrier 14. The bush 18 may carry spring gripper jaws 45, Fig. 2 (not shown), to hold a workpiece W in position to be acted on by the ram 17. In a modification the gripper is formed by a longitudinally slit thinwalled extension of the bush.