baber/WOPTO huggingface dataset:
Patent GB-1454598-A (GB)
Title: Load controlled induction heating
IPC: G05D23/22
Filed: 1974-07-02
Abstract: 1454598 Induction heating apparatus R J CUNNINGHAM 2 July 1974 29345/74 Heading H2H Induction heating apparatus comprises a resonant tank circuit 12 including a coil 18 adapted to be coupled to an inductive load, a current supply for supplying current pulses to the circuit at a rate sufficient to cause heating of the load and a voltage detector which responds to the removal of the load to prevent the supply of current pulses at that rate. The apparatus may be a domestic stove and when the load such as a pan is inductively coupled to the coil 18, the voltage across the circuit 12 falls. This fall in voltage is detected by the voltage detector which enables a high frequency triggering oscillator to supply pulses to a thyristor 20. The thyristor supplies current pulses to the tank circuit at a frequency sufficiently high to cause heating of the load. If the load is removed, the rise in voltage across the tank circuit is detected by the voltage detector and a sampling oscillator connected via a timer to the triggering oscillator causes the triggering oscillator to switch on the thyristor at a rate and for a duration which is insufficient to cause any heating effects. The apparatus may be operated in an automatic mode by closing switches 24, 26 and opening a switch 28. In this mode, the timer controls the triggering oscillator to enable heating of a load for a fixed time period after the initial rise in voltage on coupling the load has been detected by the voltage detector. A thermocouple 30 may be provided to switch off the heating current at a predetermined load temperature, the timer including a flip flop which is not reset until the load is removed, thereby preventing further heating of the load. The circuits used in the apparatus include transistors and integrated circuits.
Patent GB-995940-A (GB)
Title: Manufacture of detergent tablets
IPC: C11D17/00
Filed: 1963-07-24
Abstract: Detergent tablets, in the form of lightly compacted particles which are disintegrable in and soluble in water and are form retaining and resistant to breakage during shipment, comprise by weight 2% to 20% of an anionic and/or nonionic synthetic organic detergent, 20% to 50% of a water-soluble polyphosphate, 20% to 50% of a water-soluble metal silicate and 15% to 35% of water. Specified anionic detergents are: the sodium and potassium salts of C12-C18 alkyl benzene sulphonates; sodium lauryl sulphate, sodium coconut oil fatty acids monoglyceride sulphate and sodium salts of higher fatty acid amide of N-methyltaurine which contain a C10-C18 alkyl or acyl group. Specified nonionic detergents are condensates of C2-C4 alkylene oxides with alkyl phenols containing C6-C14 alkyl groups, each molecule containing 4 to 12 and an average of 9 to 10 alkoxy groups per molecule e.g. nonyl phenol polyoxyethylene ethanol averaging 9.5 oxyalkylene groups. Other nonionics specified are block copolymers of ethylene and propylene oxides, reaction products of higher fatty alcohols and lower alkylene oxides polyethoxy and polyalkoxy esters and ethers of polyalcohols e.g. of sorbitol and mannitol.  Specified polyphosphates are pentasodium tripolyphosphate and tetrasodium pyrophosphate.  Specified water soluble silicates used are alkali metal salts having a metal oxide to silica ratio, by weight, of 0.3 to 1.0.  Other ingredients include potassium hydroxide, sodium and potassium sulphates, sodium carboxy methyl cellulose, colouring agents, fluorescent dyes, perfumes, bleaches, solvents and anti-redeposition agents.  The detergent tablets may be made by (1) mixing the components of the tablet, moving and circulating the moistened detergent particles and finally compacting at pressures of 3 to 25 p.s.i.  (2) Adding only a portion of the water to the other constituents, spray drying to produce particulate material, adding water to bring the water content up to the required level and finally pressing into tablet form as in (1).  The detergent particles may also be prepared by spray cooling, agglomeration and crushing followed by screening and classification of particle size.  The final product may be coated with moisture, sodium carboxy methyl cellulose or polyvinyl alcohol.
Patent GB-464796-A (GB)
Title: Improvements in apparatus for charging electric storage batteries
IPC: H02J7/04
Filed: 1935-10-25
Abstract: 464,796. Charging batteries. WESTINGHOUSE BRAKE & SIGNAL CO., Ltd. Oct. 25, 1935, No. 29496. Convention date, March 21. [Class 38 (iv)] In two-rate battery charging systems in which a change over is effected by the energization or de-energization of a relay, the change in the energization is effected by a second relay controlled by a predetermined change in the battery voltage, the new rate being maintained until an opposite predetermined change in the battery voltage takes place. In the system shown in the Figure, the battery B is charged from the main leads O, X through a transformer T, the high or low charging rate depending upon whether the terminal 4 or 3 is rendered operative by the armature 5 of the relay W. The energization of the relay W is effected by the armature 9 of the relay VR, which responds to battery voltage, engaging contact 6. When, owing to voltage drop, armature 9 leaves contact 6 relay W is still energized by a retaining circuit closed by the second armature 7 of relay W until the battery voltage drops sufficiently for armature 9 to engage contact 8 when relay W is short circuited. Coloured lamps G, R, indicated the rate of charge and a bell A rings when the rate is changed. In a modification, the circuit of relay W is opened by a second relay instead of by short-circuiting.
Patent GB-307093-A (GB)
Title: Improvements in or relating to electrolytic cells
IPC: C25C7/00
Filed: 1927-11-04
Abstract: 307,093. Johnstone, R. Edgeworth-. Nov. 4, 1927. Drawings to Specification. Metals, depositing; cells; electrodes; electrolytes, depositing.- Metals are deposited from solutions of their salts in a cell of the bi-polar filter-press type; the electrodes are of insoluble material adapted to receive a metallic deposit and are provided with apertures to permit circulation of the electrolyte. The apertures may be disposed at both top and bottom of the electrodes, or alternately at the top and bottom so as to produce a transverse flow through the cells; alternatively some of the cells may be arranged for flow of the electrolyte according to each system. In one construction the electrodes are assembled with intermediate diaphragms and spacing members, provided with apertures so disposed that the anolyte flows through the apparatus in one direction and the catholyte in the opposite direction. Additional apertures may be formed at the top of the electrodes for the escape of gas. The parts of the electrodes remote from the centre may be masked by varnishing or otherwise. The electrolyte may be circulated by means of a pump; alternatively the inlet and outlet pipes may be connected to an elevated storage tank and mans provided for introducing the gases generated in electrolysis into the outlet pipe to induce circulation.
Patent GB-1467168-A (GB)
Title: Process for manufacturing a base for a semiconductor device
IPC: H01L23/488
Filed: 1974-07-03
Abstract: 1467168 Making semi-conductor bases; forging; extruding Y SATO 3 July 1974 [10 July 1973 22 Nov 1973] 29562/74 Headings B3A B3H and B3P A method of making a base 12, Fig. 1, for a semi-conductor 10 comprises forming a blank 30 for the base, forming a recess 14 in the intended upper surface of the base with a projection 114 Fig. 4, extending from the bottom of the recess, and forming a stem portion 18A on the intended undersurface of the base wherein the recess is initially formed with a projection from its bottom surface and the projection is absorbed into the bottom surface as the recess attains the desired depth. The blank comprises a thermally and electrically conductive metal 26, e.g. Cu, and a weldable layer 28, e.g. Cu-Ni, formed by blanking a plurality of blanks from a clad or composite metal sheet. The layer 28 is removed to expose the base metal 26 for later attachment of the semi-conductor element 16. The blank is then introduced into a die assembly 36, Fig. 8 comprising a lower die 38 having a cavity 38a and an upper die 40 having a recess 40a. A knockout 42 extends through the lower die and includes a telescopically extending knockout pin 44. During downward movement of the die 40 a shallow recess 14A and shallow stem 18A are produced and since the pin 44 is momentarily retracted a projection 114 is formed in the recess. Upon further downward movement the projection is removed and the pin is lengthened and the recess is deepened. In an alternative embodiment, the lower die has a concave end profile (46), Fig. 9 (not shown), which produces a profile (114<SP>1</SP>) on the blank 30 of convex shape. Also, the base may be formed of a single metal rather than of a composite and thus obviate the removal of the upper layer 28. A base plate (236), Fig. 10 (not shown), of steel or iron may be mounted within the recess in the base of the mounting of the device (216). After working in the die assembly the stem portion is threaded by rolling.
Patent GB-320022-A (GB)
IPC: H01J1/20
Filed: 1929-09-30
Abstract: 320,022. Marconi's Wireless Telegraph Co., Ltd., (Assignees of Roberts, W. van B.). Sept. 28, 1928, [Convention date]. Vacuum tubes.-The filament of a thermionic valve is adapted to be heated by currents induced directly in it in such a way that it is substantially at the same potential throughout and no hum is produced when the valve is used in a radio receiver. The filament is formed as a closed loop 1 acting as a singleturn secondary of a transformer and may be mounted concentrically in an evacuated toroidal envelope 3, being spaced therein by discs 9. Current is induced in the filament by a primary winding 7 on a core 5. Fig. 3 shows a multiple valve consisting of four triode systems, the anodes 15, 17, 19, 21 being supported by spacers 45 and the grids 23, 25, 27, 29 similarly supported in the anodes. The common cathode may have a single leading-in wire 13. The spacing discs 9, if of metal, act as screens between the systems. Fig. 4 (not shown) shows a similar device having two diode systems to act as a full-wave rectifier.
Patent GB-629495-A (GB)
Title: Improvements in clamping devices
IPC: B25B5/12
Filed: 1947-11-06
Abstract: 629,495. Clamps. ROSS, D. Nov. 6, 1947, No. 29626. [Class 61(ii)]  A bar is held in a cylindrical or other shaped aperture b, Fig. 1, in the body a of a clamp by a sliding sleeve g having two diametrically opposite recesses g<SP>1</SP> each adapted to register with substantially one half of the aperture and urged into contact with the bar by a nut h on the reduced screw-threaded end a<SP>3</SP> of the body. The edges of the recess g are toothed or notched and the part of the body taking the sleeve is reduced in diameter to render the cup-shaped sleeve a flush with the general surface. In Fig. 7, a clamp with a second aperture perpendicular to the first and a similar sleeve g and nut h is used to clamp a vice e to the bar f of a stand f<SP>1</SP>.  The two apertures may be parallel or at any inclination.
Patent GB-1014781-A (GB)
Title: Improvements in or relating to electroacoustic transducers
IPC: H04R19/00
Filed: 1962-08-02
Abstract: 1,014,781. Electrostatic transducers. WESTERN ELECTRIC CO. Inc. Aug. 2, 1962 [Aug. 7, 1961], No. 29679/62. Heading H4J. In an electrostatic earphone or microphone the space between a diaphragm 15 and a backplate 10 is occupied by a dielectric layer 14 such as to make spatially irregular contact with the diaphragm and form a plurality of randomly distributed air pockets. The diaphragm 15 comprises a thin sheet of plastic metallized with aluminium and this is forced on to the dielectric layer 14 so as to expel the large air bubbles lying between them. More than one such layer 14 may be provided. The back-plate 10 is of brass and may have ridges 11 to space the lower dielectric layer 14. To give a resonance of 14 kc/s. the back-plate has 200 blind bores 12; through bores may be provided. The back-plate 10 is held in a plastic cup 13 mounted in a metal cup 16. The diaphragm is clamped about its periphery by a ring 17 bearing on the rim of cup 16 and put under pressure between a screw cap 24 and a bottom container 23. The screw cap 24 provides the earpiece with a resonance of 12 kc/s. which may be damped by a packing material 25 such as porous paper which may touch the metallized layer 15. To ensure a good contact between the back-plate and the dielectric layer 14 the back-plate may be thrust on to the layer by a ball bearing 21 impelled by a screw 20.
Patent GB-1475270-A (GB)
Title: Transport device for letters and the like
IPC: B65H29/60
Filed: 1975-07-16
Abstract: 1475270 Delivering sheets DE STAAT DER NEDERLANDEN POSTERIJEN TELEGRAFIE EN TELEFONIE 16 July 1975 [16 July 1974] 29834/75 Heading B8R Letters are advanced on worms 1, 2, 3 to a pneumatic conveyer belt 4, between belts 5, 6 to a reading station 7, and between belts 8, 9 to a photo-electric detector 14, and to a diverting roller 16 having a flattened portion. If the letters are too close together or over-lapping, the roller is not rotated and at least one letter falls into a receptacle 19, whence it can be returned to the worms. Otherwise, the roller is rotated through a one-revolution coupling to reverse the direction of movement of the letter and advance it to a second detector controlling the rotation of a second flattened roller 20. If the roller 20 is not rotated, the letter 10 is advanced between belts 9, 30 to a sorting-machine, whereas if the roller 20 is rotated through a onerevolution coupling, it causes the letter to be advanced between belts 18, 25 to worms 11, 12, 13, whence it can be manually returned to the worms 1, 2, 3.
Patent GB-481304-A (GB)
Title: Improvements in machines embodying gill-frames of the push-bar type for drawing flax, wool and other fibres for forming slivers or yarn
IPC: D01H5/10
Filed: 1936-11-03
Abstract: 481,304. Push - bar gill - frames. GILLESPIE, J., and SHAW, P. Nov. 3, 1936, No. 29871. [Class 120 (i)] In gill-frames of the push-bar type, the bars c, Fig. 1. are controlled so as to enter and leave the sliver approximately at right-angles to the plane of the fibres by the provision of a single throw crank c<1>, Fig. 2, at one end of each bar and two separately constructed continuous enclosed cam paths a, b, Fig. 3, at each side of the machine, the path a controlling the pushbars and the path b controlling the single throw cranks. Driving wheels d are provided at one end of the machine at each side for actuating the push-bars. The cranks of alternate bars are disposed on opposite sides of the machine. Removable blocks f may be provided for insertion or removal of the gill-bars.
Patent GB-1121303-A (GB)
Title: Packets for cigarettes or the like
Inventor: JOHN WALKER CHALMERS
IPC: A24F15/12
Filed: 1964-07-27
Abstract: 1,121,303. Hinges. MOLINS ORGANISATION Ltd., J. W. CHALMERS and W. A. ROFFEY. 26 July, 1965 [27 July, 1964], No. 29905/64. Heading E2F. [Also in Division B8] A plastics hinge moulded integrally with the lid L and the body of a flip-top packet for cigarettes, &c. (see Division B8), comprises an intermediate hinge plate I connected by two parallel hinge lines of weakness H1, H2 to the back L3 of the lid and the back B3 of the body, the hinge H1 being weaker than the hinge H2.
Patent GB-246110-A (GB)
IPC: C01B32/336
Filed: 1925-11-26
Abstract: 246,110. Farbenfabriken vorm. F. Bayer & Co. Jan. 13, 1925, [Convention date]. Void [Published under Sect. 91 of the Acts] . Materials for making gas.-Materials which are pasty or have a tendency to become so on heating, e.g. sawdust, peat, lignite, ground bones &c. impregnated with acids, salt solutions, or alkalis, are prevented from adhering to the sides of retorts &c. during carbonisation by subjection to pressure in a wire cutting press or a briquetting machine before being charged into the retorts. The pressed material may be sprinkled with dry vegetable matter.
Patent GB-621072-A (GB)
Title: Improved method for providing movement of paper, photographic film, and other flexible sheet material as used with recording, photographic and printing apparatus and machinery
IPC: G03B1/26
Filed: 1946-10-10
Abstract: 621,072. Feeding webs; typewriters. HOLLIS, C. P., and BROWN, W. H. Oct. 10, 1946, No. 30238. [Classes 100 (i) and 100 (iv)] [Also in Group XX] To feed webs of paper, or photographic films without slip, the webs are fed between geared teeth which form corrugated tracks at each edge of the web. As applied to a typewriter in which an impression is printed on a web d and transmitted by carbon paper to a copy e, the webs are given movements of different amounts between the impressions by means of a pair of gear-wheels a, c for the web d, and wheels b, c for the web e which is finally wound up on a spring drum g. The gear-wheels may be rotated by the tension of web d in the direction of the arrow A, or by the drum g acting upon the web e. The gears c are mounted in spring- pressed levers i, and the web e passes over guide rollers f, h. The invention is applicable to the feeding of films in cameras and cinecameras.
Patent GB-680689-A (GB)
Title: Improvement in buffing wheel or wheel section
IPC: B24D13/20
Filed: 1950-12-11
Abstract: 680,689. Buffing-wheels. HALL, E. W. Dec. 11, 1950 [Jan. 10, 1950], No. 30282/50. Class 60. A buffing-wheel comprises a number of sections clamped on a shaft 10 between end plates 12 and each consisting of an axially-compressible hub 16 encircled by a ring 22, which is substantially incompressible in the axial direction, and an outer annulus 18 of axially-compressible material. The hub, ring and annulus are connected together against radial separation by side plates 20, preferably of hard fibre, which may be secured by an adhesive. The hub 16 may be chip board, the ring hard fibre, and the buffing annulus 18 a plurality of plies of fabric.
Patent GB-1184695-A (GB)
Title: Improvements in or relating to Mine Roof Support Constructions
IPC: E21D23/00
Filed: 1967-06-30
Abstract: 1,184,695. Advancing mine roof supports. GEWERKSCHAFT EISENHUTTE WESTFALIA. 30 June, 1967 [2 July, 1966; 9 Sept., 1966], No. 30394/67. Heading E1P. In an advancing mine roof support comprising two frames arranged in parallel with a double-acting advancing ram 9, 10 therebetween and wherein each frame comprises a head plate supported by two props such as 1, 2 or 3, 4 adapted to be individually advanced along associated guide rails as shown, the props of each frame are interconnected by a cable passing over a pulley 22 connected to the cross-head 15. For a modified arrangement involving a slightly different sequence of advance of the props relative to a face conveyor, Figs. 5-11 (not shown) should be referred to.
Patent GB-715738-A (GB)
Title: Preparation of leuco-indanthrone sulfuric esters
IPC: C09B9/02
Filed: 1952-12-01
Abstract: Leuco-indanthrone tetra-sulphuric esters are made by reacting a leuco-sulphuric ester of a b -amino-anthraquinone having a free a position next to the amino group or its N-acyl derivative with an oxidizing agent which is a compound (other than a complex salt) of tetra- or hexa-valent iron, or a compound of cobalt or nickel in the tri- or tetravalent state.  In examples, the disulphuric ester of 2-amino-3-chloro-anthraquinone is reacted with (1) cobaltic hydroxide, (2) barium ferrate, (3) nickel dioxide (also used with 2-amino-3-bromo-anthraquinone disulphuric ester, (4) a ferrate solution prepared from ferric hydroxide and sodium hypochlorate. Other esters specified are those of 2-aminoanthraquinone or its 3-carboxylic acid, 2-amino-3-methyl or methoxy-anthraquinone and 1.2-benz-3-amino-anthraquinone. Perferrites and cobaltic dioxide are also referred to as metal compounds.
Patent GB-782836-A (GB)
Title: Improvements in or relating to butterfly valves
Inventor: LIVINGSTON ALEXANDER CUNNINGHA
IPC: F16K1/228
Filed: 1954-10-22
Abstract: 782,836. Butterfly valves. GLENFIELD & KENNEDY, Ltd. Oct. 14, 1955 [Oct. 22, 1954], No. 30444/54. Class 135. In a butterfly valve comprising a valve disc 1, Fig. 1, on a shaft 3 and angularly adjustable within a cylindrical casing 2 having a smooth bore, the disc 1 having a peripheral uninterrupted annular groove 5, Fig. 12, and being so mounted on the shaft that the pivotal axis is oblique to the plane defined by the disc periphery and does not intersect the latter, an inflatable sealing member, such as a hose 4, is located in the groove 5 to contact the casing bore only when the member 4 is inflated. The angle of disc obliquity is between 10 and 45 degrees which corresponds to a shaft movement of between 90 and 180 degrees. The shaft 3, Fig. 1, passes through bearings in the casing and disc, which bearings may be horizontal or inclined; one end of the shaft 3 is connected through gearing 10 to a handwheel 11 or an hydraulic jack or electric motor (not shown). The hose 4, Fig. 12, is held in position by a ring 12 and inflated by pressure fluid admitted through a passage 13 in the shaft 3 to a tube 14 connected to the hose 4; fluid enters the passage 13 from a tube 17, Fig. 1, controlled by a cock and either led from the upstream side of the valve disc when it is closed or from an independent fluid supply.
Patent GB-1013415-A (GB)
Title: Improvements in carburettors
Inventor: MENNESSON ANDRE LOUIS
IPC: F02M7/22
Filed: 1964-08-04
Abstract: 1,013,415. Spray carburetters. SOC. INDUSTRIELLE DE BREVETS ET D'ETUDES S.I.B.E. Aug. 4, 1964 [July 26, 1963; Oct. 3 1963], No. 30500/64. Heading F1B. In a constant suction carburetter having a main throttle valve 4 and an automatically opened choke valve 2, Fig. 1, operated by air flow and connected to the fuel metering needle 8, the force of the means 20 urging valve 2 closed is reduced when the valve 4 is near to full opening. In Fig. 1 the loading spring 20 of the eccentric choke valve 2 is connected to a slidable stop 21 normally held in the position shown by a strong spring 23. When valve 4 is near full opening, a lever 24 on its spindle contacts the stop 21 and moves it to the left to reduce the force of spring 20, thereby reducing the value of the constant suction in the space 6 between the throttles 2, 4. In a modification (Fig. 5 not shown) the member 21 is inclined to the spring 20 so that its movement shifts the force of spring 20 and also alters its direction slightly so that the torque of the spring about the choke pivot 3 is reduced. The spring 20 may also be double and the member 24 can act on one or both springs. In Fig. 7 the spring 20 is connected to a bell crank lever 25 connected to a diaphragm 28 actuated by suction downstream of the valve 4 so that from idling to near full throttle the suction holds diaphragm 28 in the raised position shown whilst near full throttle the decreased suction permits the diaphragm to be forced down by spring 30, reducing the force of spring 20.
Patent GB-140995-A (GB)
Title: Improvements in thrust bearings for rubber forcing machinery
IPC: F16C17/04
Filed: 1919-12-05
Abstract: 140,995. Nuttall, J. H., and Bridge & Co., D. Dec. 5, 1919. Extrusion machines.-The forcing screw shaft of a rubber-forcing machine is provided with a fluid thrust bearing comprising a chamber a to which oil or other liquid is forced by a pump k from a tank i. A gauge h indicates the pressure. The pump is operated either by hand or automatically. Stuffing-boxes s and cup-leathers t prevent the escape of the liquid along the shaft.