baber/WOPTO huggingface dataset:
Patent GB-953394-A (GB)
Title: Switching circuits employing semi-conductor controlled rectifiers
Inventor: SMITH SIDNEY BASIL
IPC: H03K17/73
Filed: 1961-04-17
Abstract: 953,394. Semi-conductor controlled-rectifier switching circuits. ROTAX Ltd. March 26, 1962 [April 17, 1961], No. 13696/61. Heading H3T. In a circuit in which two semi-conductor controlled rectifiers 3, 4 each in series with a respective load 6, 7 are connected with appropriate polarity between the positive and negative terminals 1, 2 of a supply source and a commutating capacitor 5 is connected between the junction points of each controlled rectifier with its corresponding load so that effectively bistable operation may be achieved by the application in alternation of triggering pulses, derived for example from multivibrator 10, to the gate electrodes of the two controlled rectifiers, switching of one controlled rectifier to its conducting state resulting in the transmission via the capacitor 5 of a pulse switching the other transistor off, the series combination of a third semi-conductor controlled rectifier 8 and a load 9 is connected in parallel with one of the previously-mentioned loads 6, means being provided which when the controlled rectifier 3 in series with the controlled rectifier 8 and load 9 commence conducting is effective to trigger the controlled rectifier 8 after a variable delay. In the circuit shown, such means is constituted by a pulse generator 11 of variable mark-space ratio. By this means the time for which current flows through the load 9, which may be the field winding of a generator, may be varied between zero and a maximum equal to the period for which controlled rectifier 3 conducts although the period for which current flows through load 6 cannot be reduced below a predetermined minimum value. The loads may alternatively be connected in the anode circuits of the controlled rectifiers with the capacitor 5 connected between the anodes.
Patent GB-590603-A (GB)
Title: Improvements in or relating to waste heat or surplus heat boilers
IPC: F22B1/06
Filed: 1944-07-18
Abstract: 590,603. Water-tube steam boilers. LEWIS, W. Y. July 18, 1944, No. 13716. [Class 123 (ii)] A surplus heat steam boiler comprises a horizontal drum a from the lower surface of which depend a plurality of water tubes, in two banks e, b, between which and around hot gases are caused to flow in a direction parallel to the axis of the drum, from left to right as seen in Fig. 1. The tube bank b, or latent heat section, are single closed-end or double-legged U-tubes provided with inner feed tubes c leading from a trough or floor q fitted within and extended across the drum, whereas those of the bank e, or sensible heat section, are double-legged tubes in series relationship with the legs of each tube opening into adjacent closed compartments f formed in the drum by transverse segmental plates g. A sloping tray k with side walls n, Fig. 2, is mounted above the compartments f, and a steam and water chamber s, defined by side and end plates t, 11 and a cover u, above the floor q. The arrangement is such that feed water, supplied to the drum at h and led to the extreme right-hand compartment f, passes through said compartments f and tubes e in succession to the other extreme compartment i, from whence it flows through an opening j in the tray k and down the tray for discharge into the drum a proper at m. It then passes to above the floor q and into the tubes c. partly through openings 10 in the side plates 11 of the chamber s, and returns through the tubes b to the space below the floor q where it is directed by a duct r to the chamber s, the cover u of the latter being provided with a steam outlet opening w above the normal water level x. Superheated elements may be fitted at the gas inlet end of the boiler, that is to the left of the first row of tubes b, Fig. 1, and the drum a is preferably provided with blow-down outlets o, z.
Patent GB-116986-A (GB)
Title: Improved Stopper for Vacuum Flasks and the like.
Inventor: BRUNETTE ADOLPHUS WILLIAM
IPC: B65D45/30
Filed: 1918-02-08
Abstract: 116,986. Brunette, A. W., and Scarborough, C. C. Feb. 8, 1918. Fitted with drinking- cups. - Relates to stoppers for vacuum flasks &c. in which a wooden core B covered with a rubber ferrule C is held on the mouth of the flask by a spiral spring A when the cup D is screwed down. According to the invention, the core B is shaped so that there is an annular cavity E between the core B and the ferrule C to allow the stopper to accommodate itself to the mouth of the vessel.
Patent GB-254073-A (GB)
Title: Improvements in apparatus for cooling liquids
IPC: F28C3/00
Filed: 1925-05-26
Abstract: 254,073. Dunkelberg, C. May 26, 1925. Cooling water by direct contact with cooling medium. - Water to be cooled, such as the cooling- water of steamcondensers, is supplied through a pipe c to a rotating container b having perforations d at the top through which the water is sprayed into a surrounding casing k up which a flow of cooling-air is induced by fan blades f on the container. The wall of the casing is provided with annularly arranged spaced baffles e to subdivide the water as it falls down the casing. Air may be admitted to the interior of the container b through pipes m or through a passage through the shaft of the container. The pipes m may be curved at the bottom to act as propellers, and the fan may be arranged above the top of the container. The cooled water collects in a tank h.
Patent GB-316211-A (GB)
Title: Improvements in or relating to the manufacture of engraved printing rollers for fabrics and the like
IPC: G03B27/46
Filed: 1929-05-02
Abstract: 316,211. Bonnaud, P., and Jourdan, L. July 25, 1928, [Convention date]. Void [Published under- Sect. 91 of the Acts]. Projection-printing apparatus.-Rollers bearing a design repeated regularly over the surface for continuous printing on fabrics are prepared from a sensitive surface on which the design has been printed the required number of times in steps. The sensitive surface is held in a frame a sliding on parallel rods on a carriage. b which slides on a main frame k at right angles to the direction of motion of the sensitive surface. The rods on which the printing frame and the carriage slide are provided with stops c, d2, d1, h, h1, i, adjustable in position and arranged at intervals corresponding to the, number of translations of the sensitive surface and carriage to give the required number of repeats. The stops consist of a sleeve bearing a latch which can be swung forward into operative position and against which the printing frame and carriage then abut. The projection apparatus A is movable vertically by means of four racks r which mesh with pinions on a frame n supported by rods over the main frame, the pinions being mounted on two axles and operated by a single handle t.
Patent GB-901955-A (GB)
Title: Improvements in or relating to apparatus for and a method of automatically titrating fluids
Inventor: MONK PHILIP REGINALD
IPC: G01N31/16
Filed: 1957-04-30
Abstract: In automatic titration apparatus for dispensing <FORM:0901955/III/1> a first fluid into a second fluid, particularly for use in the estimation of water by the Karl Fischer method, a pair of electrodes are immersed in the second fluid and connected to a potential source, so that a signal variable with the conductivity of the fluid mixture is developed across the electrodes, and the signal is amplified and fed to a differential relay biased by a reference potential to control the operation of an electromagnetic valve which controls the flow of the first fluid. As shown, electrodes 1 immersed in a second liquid are connected via a variable resistor 10 to a power source 3, the electrode signal being amplified by an amplifier 2 comprising transistors 2a, 2b, and fed to a coil 4a of a differential relay 4 in opposition to the bias current supplied to winding 4b via a variable resistor 11.  Operation of a switch s in the relay system 5 (powered by unit 6) energizes relay B to supply power from a source 8 to an electromagnetic valve 7, thus initiating the flow of a first liquid 9 into the second liquid.  A sharp change in the electrode signal at the end point of the titration causes relay 4 to open contacts a thus terminating the flow of the first liquid. Energization of relay B also energizes a relay C whose contacts, which are shunted across the switch s, are provided with a time delay, so that they enable a reversion of the electrode signal within a predetermined period to reopen valve 7.  The apparatus may be adapted to operate more than one valve, and to control the selective admixture of a gas and a liquid or of gases.
Patent GB-1480576-A (GB)
Title: Pre-coloured microscope slide for blood investigations
IPC: G01N33/48
Filed: 1976-04-06
Abstract: 1480576 Blood stain composition BOEHRINGER MANNHEIM GmbH 6 April 1976 [11 April 1975] 13853/76 Heading G1B [Also in Divisions C4 and G2]  In blood investigation superior results are obtained using a pre-coated slide having thereon a mixture of methylene blue N and cresyl violet acetate if (a) they are chromatographically pure and (b) if used in the ratio 1 : 1À5 to 1 : 5. The methylene blue N is preferably used in the form of its monohydrochloride. The purification is described, [see Group C4].
Patent GB-758135-A (GB)
Title: An improved speed setting device for machine tools
IPC: B23B47/20
Filed: 1954-05-12
Abstract: 758,135. Electric control systems. RUHRSTAHL AKT.-GES. May 12, 1954 [May 12, 1953; April 13, 1954], No. 13907/54. Class 40(1) [Also in Groups XXII and XL(b)] A machine tool comprises means 8-10 for adjusting the driving means 5 associated with a tool holder 3, the individual tools 15 I-V being available in a storage device 13 such that the adjustment takes place when a tool 15 II is extracted from the storage device and prior to fitting it into the tool holder. In a drilling machine, the spindle is carried on a sliding head 1 and is rotated by a motor 2 through the variable speed gearing 5. The gearing 5 is adjusted by a motor 4 rotating bevel gears 6, 7, the latter engaging a threaded shaft 8 having the rack portion 9 engaging the pinion 10 on the shaft 11 connected to the gearing 5. The setting is indicated on a dial. The gearing may be replaced by stepped gears controlled either by a circular hydraulic valve or by electromagnetic clutches. Each tool 15 in a compartment 14 in the bin 13 is associated with a potentiometer 18 set according to the speed required. When a tool is extracted, a switch 16 is closed and a relay 22 supplies current to rotate the motor 4 in one direction or another until a contact 19 carried on the spindle 8 has been moved to a position of balance in a bridge circuit comprising the potentiometers 18, 20. In a modification, the potentiometer 20 is replaced by a generator driven by the drill spindle. In a further modification, an additional fixed-tapping potentiometer is provided so that, when a tool is extracted from the chuck, or when the tool is withdrawn from the work, or when the drill motor is stopped, the potentiometer 20 is immediately moved to a central position. The time for the next speed change to be effected is thus reduced. Additional sets of potentiometers may be provided for adjusting the feed or drill pressure. In another modification, the tools 36, Figs. 5 and 6, are carried in clips 38 and supported by brackets 50 in a drum rotated by a handwheel 34 to bring them successively into a position where they can be extracted. When a tool is extracted, the arms of the clip 38 move inwardly to close a switch 39 thus operating a solenoid 47 to lock the drum by a catch 41 and to energize a setting circuit according to which of a series of switches 48 is operated by a cam 49. In a final modification, the tools 58, Fig. 7, are carried in containers on a chain 55. When the tool required is extracted from the top of a casing 51, a photoelectric device 60, 61 operates means 65, 66 to lock the chain and to render operative speed adjusting means which have been selected by the actuation of an appropriate switch by a cam disc on a shaft 53.
Patent GB-929559-A (GB)
Title: Method of growing epitaxial semiconductor layers
IPC: H01L21/205
Filed: 1962-04-12
Abstract: 929,559. Coating by vapour deposition. WESTERN ELECTRIC CO. Inc. April 12, 1962 [July 5, 1961], No. 14118/62. Class 82. [Also in Group XXXVI] An epitaxial semi-conductor film of gallium arsenide or gallium phosphide is formed in a semi-conductor substrate by a vapour deposition process in an atmosphere of HC] while maintaining a thermal gradient between the substrate and the source material. In the case of the gallium arsenide the source should be at 550-1200 C. and the substrate at 500-1150 C. and the temperature gradient should be 10-100 C. For gallium phosphide the source should be at 750-1200 C., the substrate at 650-1100 C. and the temperature gradient 80-120 C. Examples are given of the deposition of n-type gallium arsenide on n-type gallium arsenide and on p-type germanium, of p-type gallium arsenide on n-type gallium phosphide and of n-type gallium phosphide on p-type gallium arsenide. The process is carried out in a reaction chamber 11 which contains the gallium arsenide or phosphide source 16 and the substrate 15. A heat sink 17 in the form of a silver wire conducts heat from the substrate and maintains the required thermal gradient. The reaction chamber is fitted with HCl gas and heated in a furnace 12.
Patent GB-1503094-A (GB)
Title: Method for the prophylaxis and treatment of diarrhoea in dogs
IPC: A61K35/74
Filed: 1976-04-07
Abstract: 1503094 The prophylaxis and treatment of diarrhoea in dogs NISSHIN FLOUR MILLING CO Ltd 7 April 1976 [9 April 1975] 14161/76 Heading ASB Diarrhoea in dogs is prevented and treated by orally administering to dogs Bifidobacterium pseudolongum and/or Bifidobacterium adolescentis isolated from the intestines and/or faeces of dogs. The bifidobacteria may be administered as a food composition obtained (1) by mixing them with a dog food, (2) dispersing them in sterilized milk or (3) by mixing them into a gelatinized starch paste containing an amino acid vacuum drying the mixture and then crushing it to granules. Veterinary compositions comprise (1) the above Bifidobacterium pseudolongum and/or Bifidobacterium adolescentis and (2) a dog food, sterilized milk or an amino acid e.g. sodium glutamate, lysine hydrochloride and/or 1-cysteine.
Patent GB-383630-A (GB)
Title: Stabilisation of blasting explosives
IPC: C06B23/00
Filed: 1931-05-13
Abstract: 383,630. Explosives. WILLIAMS, V. H., Cumbrae Cottage, Hill Place, Ardrossan, and IMPERIAL CHEMICAL INDUSTRIES, Ltd., Millbank, London. May 13, 1931, Nos. 14192/31 and 32045/32. [Class 9 (ii).] A small amount of the order of 0À5 to 2 per cent of a mildly alkaline phosphate, such as disodium, di-ammonium, and sodium ammonium hydrogen orthophosphates, is added to a blasting explosive containing a nitric ester such as nitroglycerines and nitroglycols with or without nitrocellulose, or a nitrocompound, with or without other ingredients. The phosphate prevents accumulation of acid products, and reduces hygroscopicity of impurities such as magnesium and calcium salts found in the impure sodium nitrate which is commonly used in nitroglycerine blasting explosives. An example contains nitroglycerine 70 parts, nitrocellulose 5 parts, dinitrotoluol 0À5 parts, sodium nitrate 18À7 parts, woodmeal 5 parts, chalk 0À3 parts and di-ammonium hydrogen orthophosphate 0À5 parts. Specifications 254/83, 12424/87, 14196/97, 232/98, [all in Class 9, Ammunition &c.], are referred to.
Patent GB-736052-A (GB)
Title: Improvements in couplings for connecting pipes to reservoirs or the like
IPC: F16L37/107
Filed: 1953-05-20
Abstract: 736,052. Valves. MULLER, J. May 20, 1953 [Feb. 13, 1953], No. 14213/53. Class 135. [Also in Groups XXVIII and XXXVII] A fitting 12a, Fig. 8, to which a hose coupling is attached and fixed in the base of a reservoir 97, is extended by a cylindrical cage 98 pierced by axial slots 99 and enclosed by a slide 100 rotatably mounted on a central column 101 and provided with axial slots 102. The slide 100 has a toothed ring 103 engageable with a pinion 104 rotatably mounted on the column 101 and rigid with a lever 105 pressed by a spring 105<SP>1</SP> against the base of a liquid-filled bellows 107 carried on a lateral arm 106 attached to the top of the column, the bellows communicating by a pipe 108 with a bellows 110 located in a skirt 112 and supporting a float 111. Liquid fed through the hose coupling and past the valve 66 enters the reservoir and when the desired level of the liquid has been reached the float 111 is lifted to axially compress the bellows 110, the liquid in the latter being forced through the pipe 108 to expand the bellows 107 and depress the lever 105 thereby rotating the slide 100 and closing the slots 99 in the cage 98. In a modification, the fitting 12a, Fig. 9, is extended by a cap 113 having apertures 114 and enclosed by a slide 115 mounted on a column 116 screwed into the head of the cap, a spring 117 disposed between the slide and the cap tending to lift the slide. A tubular extension 118 of the slide 115 has pivoted thereto one arm of a lever 119 fulcrummed on a spindle carried at the top of a support 120, the other arm of the lever being articulated to a rod 121 connected to a float. The slide 115 is lifted as the level of the liquid in the reservoir falls and to progressively uncover the apertures 114.
Patent GB-1203697-A (GB)
Title: A pivoting flue for the evacuation of fumes
IPC: F27D17/00
Filed: 1968-03-25
Abstract: 1,203,697. Converter chimneys. SOC. LORRAINE DE LAMINAGE CONTINU. 25 March, 1968 [24 May, 1967], No. 14307/68. Headings F4B and F4J. A waste gas flue for a Kaldo or like converter 10 comprises an inlet portion 1, an angled conduit portion and an upper portion which is coaxially situated beneath a vertical evacuation chimney 3, the flue resting solely on a pivot 4 coaxial with the chimney and carrying a lateral arm 5 mounting a double-walled blowing lance 9 and support means therefor. The flue is laterally guided at its upper portion by a circular train of rollers 32 on a band which moves relative to a ring 30 fixed to a floor (not shown) of the steelworks. Cooling fluid is supplied to a jacket 12 about the flue and to the lance together with injection gas for the lance through flexible pipes and couplings 11, 11a, 11b. Axial movement of the lance is controlled by mounting the lance on a trough-like carriage 14 having rollers 16 running on guide rails via a rack and pinion 19. Movement and inclination of the lance is controlled by mounting the carriage, lance and rails within a pair of plates 20 pivoted about an axis 21 by a drive and worm system 22. A connection 7 in the flue may be used for the introduction of additional products, e.g. ore or limestone, into the converter.
Patent GB-248231-A (GB)
Title: Portable power driven rotary tool
IPC: B25D16/00
Filed: 1925-06-02
Abstract: 248,231. Black, S. D., and Decker, A. G. June 2, 1925. Drilling-machines; bolts and nuts, screwing-up and unscrewing. - In a portable power driven rotary machine wherein the tool such as a screwdriver, wrench, drill &c, is driven through a yielding clutch and gearing, the tool-holder is under spring control so that the drive only takes place when it is pressed against the work. A retaining device is also provided so that the clutch is made positive for drilling. A hollow spindle 5 is driven through reduction gearing 9 from an electric motor 11 and has inclined clutch teeth 32 which engage similar teeth 29 on a toolholder 22 when the latter is moved axially against the pressure of a spring 20 by the end thrust of the work on the tool. The clutch teeth are spaced well outwardly from the normal diameter of the spindles to reduce the stress in them, and are made of hard steel. The clutch is adapted to slip on encountering excessive resistance and by withdrawing the machine slightly when a screw &c. has been driven home a series of rapid blows may be delivered by the clutch to effect the final tightening. For drilling the clutch is maintained in constant engagement by a cap 33 having bayonet-slots which engage screws 34. Sockets. - The shank 37 of the tool has a hexagonal section to engage a similarly shaped socket 38 and is retained by a groove 39 and a ball or balls 40 pressed inwardly by a shoulder 52 on a sleeve 41. A spring 46 maintains the sleeve in the closed position and a ring 42 limits its axial movement. A cross-pin 14 in the socket serves as an abutment for the end of the toolshank to position the groove 39 with respect to the balls.
Patent GB-626608-A (GB)
Title: Improvements in or relating to fluid control units
IPC: G05D7/01
Filed: 1944-07-27
Abstract: 626,608. Washing-machines. DOLE VALVE CO. July 27, 1944, No. 14365. Convention date, Jan. 13. [Class 138 (ii)] [Also in Group XXIX] A fluid control device for delivering in measured quantities either or both of two different fluid supplies, such as water at different temperatures for the different operations of a washing machine, comprises two similar units 11, 12, one having a cold-water inlet 15 and the other a hot-water inlet 16, with outlets 17, 18 connected to a common delivery pipe 20. Each unit 11, 12 comprises a diaphragm valve 26 co-operating with a seating 35 and operated by the inlet pressure through apertures 38 in the diaphragm under control of an electrically operated pilot valve 43, and a flow controller in the form of a deformable rubber washer 62 in the outlet passage of the valve. Electromagnets 13, 14 for the valves 11, 12 are controlled by an electric motor 77 driving cam discs 78, 79 actuating the circuits of the electromagnets as required to deliver the desired quantities of water at the desired temperatures to the tub 68 of the washing machine. Specifications 610,309, [Group XXIX], 626,606 and 626,607 are referred to.
Patent GB-238039-A (GB)
Title: Improvements relating to fire extinguishing apparatus
IPC: A62C5/00
Filed: 1924-06-14
Abstract: 238,039. Fyrene Co., Ltd., and Bedford, H. E. Piston valves.-For regulating steam to injectors used for fire-extinguishing solutions, a valve is used which gives a fine adjustment on first opening the valve, the steam entering through the apices of triangular ports 10 in a sleeve 8.
Patent GB-1276804-A (GB)
Title: Rack and pinion steering gear
Inventor: PARKES JEFFREY GEORGE ERNEST
IPC: B62D3/12
Filed: 1971-05-12
Abstract: 1276804 Toothed gearing; bearings FORD MOTOR CO Ltd 12 May 1971 14550/71 Headings F2A and F2Q In a rack-and-pinion steering gear, a pinion 10 is supported in a housing 13 by conical bearings 14, 15, each comprising a metal bearing ring 20, 23, of triangular cross-section, on the pinion shaft, and a plastics bearing ring 19, 24, of complementary triangular cross-section, located in a recess 12 in the housing 13. The bearing surfaces are oppositely inclined at an angle of between 35 and 60 degrees, preferably 45 degrees, to the axis of the pinion. The plastics bearing rings may be of glass reinforced nylon, or P.T.F.E., and the metal bearing rings may be of steel. Shims 26 are interposed between the bearing 15 and a cover-plate 25.