baber/WOPTO huggingface dataset:
Patent GB-1479478-A (GB)
Title: Scr inverters
IPC: H02H7/122
Filed: 1974-07-29
Abstract: 1479478 Inverting GENERAL ELECTRIC CO 29 July 1974 [2 Aug 1973] 33350/74 Heading H2F In an inverter of the type comprising a D.C. supply feeding a chopping current controller 18 in series with the parallel combination of a SCR12 and resonant circuit 15, 16, protection against commutation failure of SCR12 is achieved by monitoring the instantaneous voltage across the SCR12 and inhibiting gating pulses to the chopper 18 SCR anode voltage is below predetermined limits. As described, capacitor 15 is initially charged via resistor 20. Pulses at a lower frequency than the resonant frequency of circuit 15, 16 are produced by an oscillator 31 which simultaneously feeds a short-duration pulse to SCR12 and a longer variable duration pulse to transistor 18. SCR12 is turned off when the current in the resonant circuit 15, 16 reverses. The anode/cathode voltage of SCR12 is monitored by amplifier 43 and compared with the threshold V T  so as to inhibit further trigger pulses in the event of commutation failure. Eventual turn off of SCR12 restores normal operation. (For Figure 3 see next page.)
Patent GB-1409044-A (GB)
Title: Metal plating apparatus and method
IPC: H05K3/24
Filed: 1971-07-15
Abstract: 1409044 Plating apparatus IMASA Ltd 16 Oct 1972 [15 July 1971] 33374/71 Headings C7B and C7F Apparatus for selectively electro or electroless plating portions of a workpiece, preferably a metal (e.g. Cu) strip with Au, Pt, Cu, Ag or Ni for preparation of electrical contacts for sockets or printed circuit boards, comprises a trough 12 for the plating solution, a belt 11 which runs about horizontal axes e.g. over pulley wheels 13, 14 and has an absorbent surface which passes into the trough to pick up solution therefrom, and means for feeding the workpiece to be plated (e.g. strip 22 from a supply reel to motor driven take-up reel in contact with the solution-bearing surface so that it is plated selectively with metal continuously or at spaced points along a line. For electro-plating a circuit is provided for applying a cathodic potential to the workpiece strip and an anodic potential to the belt e.g. via a stainless steel slipper 21 bearing upwardly against the underside of the upper run of the belt; the lower run may be held in the plating solution by two spring-loaded jockey rollers 19. The feeding means and belt may be motor driven preferably in opposite directions so that there is rubbing contact between the workpiece and belt surface. The belt may be made of a synthetic rubber (neoprene) core around which is a metal wire mesh or winding with an outer felt covering. Different belts may run in the same bath or in different baths for plating selectively along parallel lines or depositing different metals on top of each other e.g. Au or Ni.
Patent GB-849255-A (GB)
Title: Method of and arrangements for cooling the walls of combustion spaces and other spaces subject to high thermal stresses
IPC: F23R3/00
Filed: 1957-10-25
Abstract: 849,255. Generating combustion products under pressure; cooling furnace walls. CERMAK, J. Oct. 25, 1957 [Nov. 1, 1956], No. 33379/57. Class 51 (1). In a method of cooling walls of combustion spaces or other thermally highly stressed spaces by means of a cooling medium admitted in individual jets to impinge on the outer surface of the wall, the cooling medium is admitted to the wall through nozzles arranged substantially at right angles thereto, the heated cooling medium being immediately withdrawn from the zone of the cooled wall. The cooled wall in Fig. 1 which defines a combustion space or other thermally highly stressed space, is formed of separate cooled members having independent cooling medium inlet and outlet ducts 2, 3, the medium being supplied through inlet 2 to a distribution chamber 4 from which it issues through nozzles 5 to impinge on the outer surface of the wall 1. The cooling medium is immediately discharged from the space 6 through the outlet 3. In a second embodiment, Fig. 2, the wall 1 is formed with pockets 7 which may be cylindrical for example, and the cooling medium nozzles 5 project into the pockets, the flow of cooling medium being as indicated by the arrows. The surface of the wall 1 on the uncooled side is covered with thermally insulating material 8. The cooling medium may be liquid or gaseous. The invention is applicable to combustion chambers of gas turbine engines, boilers and industrial furnaces &c. for example melting furnaces.
Patent GB-1426341-A (GB)
Title: Process for the production of an image on a support
IPC: B41M5/52
Filed: 1973-07-13
Abstract: 1426341 Coated sheet materials AGFAGEVAERT AG 13 July 1973 [15 July 1972] 33436/73 Heading B2E [Also in Division B6] A recording material for the production of transparencies or reflection copies by the inkjet process comprises a transparent or opaque substrate having an image-receiving layer which comprises a molecular disperse or colloidal disperse substance which is wetted by the coloured liquid sprayed on to the layer and into which the sprayed coloured liquid penetrates to a depth of at least one micron. The image-receiving layer preferably consists of a protein, e.g. gelatin, albumen or casein, polysaccharide, cellulose or cellulose derivative, polyvinyl alcohol or a copolymer of vinyl alcohol. For reflection copies the image-receiving layer may be produced by casting on a layer of a polyolefin such as polyethlene or polypropylene, or a layer of polyolefin may be poured on to the image-receiving layer after the recording has been made, or the imagereceiving layer may be heated in a glazing press or calendered to produce a glossy surface.
Patent GB-799625-A (GB)
Title: Improvements in or relating to apparatus for separating suspended particulate matterfrom gas streams
IPC: B03C3/06
Filed: 1956-11-02
Abstract: 799,625. Electrostatic precipitation. RESEARCH CORPORATION. Nov. 2, 1956 [Dec. 6, 1955], No. 33503/56. Class 39(1). An apparatus for removing dust from gases involving a combination of electrostatic precipitation and mechanical separation consists of at least one conical tube 34 tapering inwardly towards the outlet 38, the wall of the tube having louvred slots 40. The louvres slope inwardly towards the outlet 38, and corona is established between them and a smooth extended surface electrode 44 concentrically positioned within the tube. Electrode 44 tapers towards outlet 38, but stops short of it to provide a zone 56 which is free of corona. A dome-shaped member 60 is movable axially within the outlet 38 to vary the proportion of gas, e.g., 5 to 15 per cent, flowing therethrough. This gas containing concentrated particulate matter is then passed to a conventional precipitator and recirculated to duct 12. The major portion of the gas, relatively free of particulate matter, is withdrawn through duct 14 and passes via a standard precipitator to the stack. Suitable louvre dimensions and angles are given.
Patent GB-1059049-A (GB)
Title: Refrigerators having ice block maker apparatus
IPC: F25C1/24
Filed: 1965-08-05
Abstract: 1,059,049. Ice-making. GENERAL MOTORS CORPORATION. Aug. 5, 1965 [Aug. 24, 1964], No. 33540/65. Heading F4H. Ice-making apparatus comprises a motordriven ice tray supporting and twisting mechanism and a set of interchangeable ice-trays each having a plurality of moulds of which one is a detector mould including a thermoresponsive member for controlling the operation of said mechanism, the detector moulds of the set of trays all being of the same size and the remaining moulds being of different sizes. As shown, one tray 76 of the set comprises a single row of moulds 86, 94, 98 the thermo-responsive device 88 being secured to the underside of mould 86 by an insulating cap (90) (Figs. 3 and 4, not shown). The tray is detachably secured to a bracket 66 mounted on the shaft 62 of the motor-driven mechanism 60 and the apparatus is mounted in the freezer compartment of a domestic refrigerator (Fig. 1, not shown) provided with a valve-controlled water supply line (78, 84) arranged to discharge into mould 86. Another tray of the set comprises a detector mould (127) (Figs. 5 and 6, not shown) identical with mould 86 above and three rows of smaller moulds (139, 141, 143) while a further tray (Figs. 7 and 8, not shown) has, in addition to the detector mould (129), two rows of moulds (171, 173).
Patent GB-1495611-A (GB)
Title: Clutch/brake unit
IPC: F16D65/12
Filed: 1975-08-12
Abstract: 1495611 Clutch/brake combinations WARNER ELECTRIC BRAKE & CLUTCH CO 12 Aug 1975 [26 Aug 1974] 33563/75 Headings F2L and F2C A clutch/brake combination comprises a helical spring 19 which frictionally connects an input hub 11, fixed on an input shaft 13, to an output hub 14 having a sleeve 15 fixed to it, the output hub 14 also having a sleeve 21 attached to it and overlying the spring 19 and a braking member 20 is loosely mounted on the sleeve 21 so that when a braking torque is applied to the member 20 the spring 19 is unwound to engage the internal surface of the sleeve 21, disconnect the drive between the hubs 11 and 14 and brake the output hub 14. In the embodiment shown in Fig. 1 the spring 19 has a tang 41 engaging in a slot of a flange 36 of the braking member 20, the member 20 being braked by a yoke (43) (Fig. 2, not shown) which applies braking pads to it. In an alternative embodiment (Figs. 5 to 7, not shown) the braking member (20<SP>1</SP>) is biased axially away from the end of the spring (19<SP>1</SP>) by a bent end turn of the spring, the application of an axial braking force to the braking member causing the end of the spring to engage a tab projecting from the member (20) and so unwinds the spring.
Patent GB-1057244-A (GB)
Title: Clamp
Inventor: MACKINNON PETER EVERETT
IPC: F16B2/06
Filed: 1962-09-03
Abstract: 1,057,244. Cable clips. A. B. STEELE (TALONS) Ltd., and P. E. MACKINNON. Sept. 3, 1963 [Sept. 3, 1962], No. 33719/62. Heading H2C. [Also in Divisions A4 and E2] A clamp for flanges of steel sections comprises a bolt 11 having a hook 12 for one edge of the flange and a clip 15 for the other edge of the flange, held on the bolt by a nut 16 for tightening the clamp, the clip having a hole or passage through which the bolt passes formed at a part of the clip of curved arcuate shape to enable the clip to turn about an edge of the flange as the nut is tightened to cause one end of the clip to engage the flange surface, or the bolt lying against the flange surface. In the construction shown in Fig. 1 the clip has a notch at the end which engages the flange to enable the bolt to pass through, the notch being in a flat portion of the clip which is otherwise of arcuate shape. In a modification, however, the clip is completely arcuate. In a further modification the clip is made of a length of wire doubled on itself and separated at opposite local points to form passages for the bolt.
Patent GB-1002332-A (GB)
Title: Self regulating variable flow pumps
IPC: F04B49/00
Filed: 1961-09-21
Abstract: 1,002,332. Controlling pumps. SOC D' APPLICATIONS DES MACHINES MOTRICES. Sept. 21, 1961 [Oct. 5, 1960], No. 33810/61. Heading F1A. A pump control member 2 is actuated by a piston 7, which varies the pump output inversely to the delivery pressure in pipe 5, and by a servomotor device 11 which varies the delivery pressure as a direct function of pump delivery. The pump, which may be radial cylinder or swash plate, feeds a driven device or control throttle 6. On decrease in pressure in pipe 5 the piston 7 descends to tilt member 2 about pivot 3 to increase the pump delivery Simultaneously the servo control valve 9 is lowered to admit pressure to cylinder 11 and force it downwards to compress spring 15. Due to the differential arrangement of pivots 8, 17, the cylinder 11 moves down further than piston 7 so that the load of spring 15 is increased and equilibrium is re-established with an increased pump delivery at increased pressure. In a modification, Fig. 3, the cylinder 11 is stationary and spring 15 is controlled by piston 31 connected to a lever 35 which is connected to the member 4, the servo valve 34 also being connected to lever 35. In a further modification the servo valve is connected to a cam on the member 2.
Patent GB-1112603-A (GB)
Title: Thermal actuator and control therefor
IPC: H01H61/02
Filed: 1965-08-06
Abstract: 1,112,603. Thermal switches. JOHNSON SERVICE CO. . 6 Aug., 1965 [28 Aug., 1964], No. 33849/65. Heading H1N. [Also in Division G1] Expansion of a suitable material 90 such as a wax upon heating by a resistance element 92 pushes an actuator shaft 91 out of a cylinder 88 against a restoring spring 93, outward movement being limited by actuation of a leaf spring contact member 111 via an actuator member 108 engaged by a collar 98 of a sleeve 97 press fitted on the shaft 91, the leaf spring contact member 111 carrying a contact 112 and being mounted on a base-plate 106 also carrying a silicon-controlled rectifier (121), (Figs. 2, 3, not shown), connected in a circuit controlled by the contacts 112, 113, which are actuated by member 111, which rectifier controls the heating element 92, and a load such as a valve (not shown) is controlled by the movement of the actuator shaft 91. A two-part seal encircles shaft 91 and comprises an annular disc seal 100 and a wafer-thin seal 99. Leads to heating element 92 and to rectifier (121) and contacts 112, 113, pass through the other end of cylinder 88 in a sealed extension 135 to a load responsive control 138 including a thermostat 140.
Patent GB-187888-A (GB)
Title: Improvements relating to leg shields for motor cycles
IPC: B62J17/00
Filed: 1921-12-16
Abstract: 187,888. Starck, J. R. Dec. 16, 1921. Weather screens.-Leg shields b for motorcycles of the type adapted to be detachably secured at their upper ends to the front of the machine and at their lower ends a to the footboards are formed of plywood that has been treated to render it water-proof and pliable, the shields being so shaped and constructed that when bent for securing to the machine, they assume an angular position to deflect the wind outwardly. Their inner edges each present a curve to form an aperture allowing a space for air to cool the engine. The lower ends a are secured to the footboards by extension pieces attached to the shields by quickly-detachable rigid connections, the extensions remaining, if desired, in position on the footboards after the shields have been detached.
Patent GB-390255-A (GB)
Title: Steel suitable for objects subjected to heavy wear
IPC: C22C38/04
Filed: 1931-12-07
Abstract: Steel suitable for articles to be subjected to heavy wear such as rails, tyres, sheet piling, harbour walls, &c., contains less than 0,2 per cent of carbon, 0,7-1,6 per cent of manganese, 0,08-0,25 per cent of phosphorus, and less than 0,6 per cent of silicon, with or without 0,2 - 1 per cent of copper, or up to 1,5 per cent of chromium, or both.
Patent GB-1439839-A (GB)
Title: Conveyor
IPC: B65G37/00
Filed: 1973-07-17
Abstract: 1439839 Endless conveyers G BECHTLOFF 17 July 1973 [22 July 1972] 34102/73 Heading B8A A conveyer comprises two endless conveyer belts 1, 2, Fig. 1, which are each provided with a layer of resilient material and which are in contact over a part of their conveying run, in which part the goods being conveyed are enveloped so as to be conveyed upwardly as shown by the arrows, the belts 1, 2 being guided by guide rollers 3, 4 and also being supported by respective support belts 5, 6 over the said part of their run, one or both of which may be driven, and in addition, support rollers 9, 10 are provided. In the embodiment of Fig. 2, a resilient belt 2 of foam material is guided about guide rollers 3, 4 to form loops 14 which can compensate for changes in length of the belt, a driving support belt 6 passing about the rollers 3, 4, and a conveyer belt 15 without foam material which, together with the belt 2, conveys goods, also drives the belt 2 and support rollers 16 ensure the abutment of the belt 15 against the belt 2. The embodiment of Fig. 3 (not shown) discloses a belt (1) of resilient material and a belt (23) not provided with foam material, the belt (1) being driven by a driving support belt (20) provided with ribs (21) which engage ribs (22) on the adjacent surface of the belt (1), the belt (23) also being provided with ribs (24) which engage with ribs (25) formed on the outer surface of the belt (1). The belt (1) is supported by a guide roller (18) which is subjected to an upward pull by a spring (19) whose bias is adjustable such that the belt (1) is held taut and guided.
Patent GB-1531609-A (GB)
Title: Sealing bead for use at high temperatures
IPC: B21D11/06
Filed: 1976-08-17
Abstract: 1531609 Seals W CREMERIUS 17 Aug 1976 [1 Sept 1975] 34267/76 Heading F2B A sealing bead for sealing the gap between a cold billet and a mould of a continuous casting machine prior to commencement of the casting operation comprises a plurality of folded paper strips 2 twisted together to form a bundle of helical strips that are bound together by a helically wound thread 3, the angle of inclination of the helix formed by the thread 3 being less than the angle of inclination of the helix formed by each strip 2. The strips 2 are made from waste or scrap paper crimped in a direction normal to its length. The tensile strength of the bead may be increased using tissue paper free from wood pulp for 20-40% of the strips. The thread is preferably an unwaxed and unpolished hemp thread approximately 0À3 mm thick.
Patent GB-1175434-A (GB)
Title: Method of and Apparatus for the Formation of Packages and Placing the contents thereof under Vacuum
Inventor: PLATEL CHARLES
IPC: B65B31/06
Filed: 1967-07-26
Abstract: 1,175,434. Vacuum packaging. C. PLATELL 26 July, 1967 [27 July, 1966], No. 34362/67. Heading B8C. [Also in Division E2] Bags are formed and filled successively to provide a chain of joined packages divided from each other by transverse welds but intercommunicating along the chain and open to atmosphere at one end of the chain whereby they may be vacuumized through that end and if desired, have inert gas admitted. Vacuumizing is carried out by coiling the chain under tension with an interleaving strip and placing the coil in a vacuum chamber. The chain may be formed from one doubled or two superposed webs and the transverse welds may each have a gap providing the air withdrawal passage. Alternatively, an intermittent longitudinal weld 13 spaced from one edge may provide communication with a common passage 12 between the weld and edge, the passage being retained open by a permeable cord &c. filling 11. The end of such a passage or the gap in the transverse weld at the end of the chain is closed off before the packages are exposed to atmosphere, after which the incomplete welds are rendered continuous to seal off individual packages. The packages may remain in the chain with lines of perforations between them to assist separation, or may be severed from each other. The packages are vacuumized by winding them on a drum with the interleaving strip of steel, reinforced plastics &c. The coil is then strapped and placed in the vacuum chamber which may also be an autoclave for sterilization purposes. The strip may apply pressure and may have markings to impress a pattern &c. on packages filled with granular material. It may be a hollow sealed tube enclosing sufficient air to cause it to swell under vacuum between the package coils Figs. 7,8 (not shown), and thus have a shaping function. Alternatively, pairs of pins projecting from one side of the strip may bridge the spaces between the strip coils on either side of the packages and thus relieve the latter of pressure Figs. 5, 6 (not shown). Known sealing means may be provided on the vacuuming chamber to seal the air exit from the chain, or a one way valve, e.g. a spring clip may be fitted on the end package. Several chains of packages arranged side by side may be coiled or chains as in Fig. 2, may be joined by pairs of hinged clips, Figs. 9-12 (not shown, but see Division E2) and coiled, flexible pipe connections ensuring continuity of the channel. The end of the channel may be connected within the chamber to a three way valve which is switched over to an inert gas source after vacuumizing, Fig. 14 (not shown). The final sealing and severing may be controlled by photo-electric means. The side plates of the coiling drum may be adjustable for various package widths.
Patent GB-154923-A (GB)
Title: Improvements in and relating to typewriting mechanisms
IPC: B41J1/32
Filed: 1920-12-06
Abstract: 154,923. Krupp Akt.-Ges., F. Nov. 5, 1919, [Convention date]. Index type-wheel machines; key actions.-The types are arranged helically on the surface of a cylinder which is given a corresponding screw movement for character selection by indexsetting mechanism, and is swung for impression bv depressing a key, the type-cylinder being adjustable relatively to its oscillating support. The shaft D<1>, Fig. 1, of the type-cylinder D is provided with a screw-threaded boss d<2> engaging in a screw-threaded support C forming part of a bell-crank B, which has a sliding connexion b<1>, a<2> with the impression-key lever A. Rotary movement is imparted to the type-cylinder from the index-pointer by means of toothed gearing, bevel gearing, or, as shown in Fig. 12, by means of an endless band F<4> running over rollers, one of the band rollers G being on a shaft g' carrying a broad pinion G<2> in gear with a narrow pinion D<3> on the type-cylinder shaft; the band may be perforated for positive engagement with teeth on the rollers. The index-pointer may be concentric with a circular scale and associated with one of the band rollers; or, to economize space, the pointer may be eccentric to the scale and comprise two telescopic portions K, K', Fig. 8, the outer part K<1> being engaged by means of a pin k<4> with a groove k<5> concentric with the scale. Alternatively, the index-pointer may slide along a linear scale, in which case it is attached to the band. Or the scale may comprise more than one linear row, as shown in Fig. 10, the pointer p' being loosely connected to the band by a rod p<3>, and provision being made for lifting or lowering the type-cylinder through a number of turns of the helix when shifting the pointer between the rows of the scale. The pointer is arranged to slide along the rows on a bar p<2>, which is attached to guide rods p<5> permitting a sliding movement. The type-cylinder support comprises two telescopic members C<9>, C'‹, Fig. 3, the outer part C<10> which carries the type-cylinder being connected by pins C<12> to a bell-crank p<6> connected to one of the guide rods p<5>. The linear scales may be arranged on a cylinder and in this case. the bar on which the pointer slides is carried by levers, one of which is adapted to rotate the scale cylinder and is connected to the bell-crank for shifting the type-cylinder, Alining for impression.- When the index scale comprises more than one row and the typecylinder support is made telescopic for corresponding shift, alinement after a shift is effected during the swinging movement of the typecylinder by means of a projection on the outer telescopic part engaging with one of a series of notches on the fixed framework.
Patent GB-381396-A (GB)
Title: Improvements in or relating to winches and the like
IPC: B66D5/00
Filed: 1931-12-11
Abstract: 381,396. Self-sustaining gear for winding apparatus. HIGHFIELD, J. S., 36, Victoria Street, London. Dec. 11, 1931, No. 34418. Addition to 340,427. [Class 78 (v).] The catch member of the parent Specification is replaced by a frictional brake block. The hauling rope 4 passes through a slot in one end of an arm 5 which is pivotally mounted on a pin 6 fixed to a bracket 3. A segmental tapered brake shoe 7 is carried by a pin 8 mounted in the arm 5, and when the winch is at rest is wedged between the rim of the wheel 1 and a collar 10 on the pin 6. When a pull is exerted on the rope 4, the arm 5 is raised to the position shown in chain lines and the shoe 7 is removed from the locking position.