baber/WOPTO huggingface dataset:
Patent GB-726221-A (GB)
Title: Method of producing selenium rectifiers
IPC: H01L21/10
Filed: 1953-02-13
Abstract: 726,221. Selenium rectifiers. STANDARD TELEPHONES & CABLES, Ltd. Feb. 13, 1953 (Feb. 21, 1952], No. 4104/53. Drawings to Specification. Class 37. In a method of producing selenium rectifiers in which conductivity increasing substances such as halogens or halogen compounds are added to the selenium, thus accelerating the re-crystallization in the annealing process, recrystallization retarding substances, such as arsenic or phosphorus are added in such quantity that at a given conversion temperature the time of conversion is the same as for pure selenium. The selenium may be deposited in two layers, the first containing both conductivity increasing and re-crystallization-retarding agents, the second, a thinner layer having either a smaller proportion of the latter or none at all. Both layers are annealed for a period which gives minimum resistance to the first layer, while the second layer acquires a high resistance, this combination of layers giving improved performance.
Patent GB-104909-A (GB)
Title: An Electrical Distributing System, depending on the use of Condensers.
Inventor: LONGFORD HERBERT GEORGE
Filed: 1916-03-21
Abstract: 104,909. Longford, H. G., Longford, W. W., and Clark, W. A., (trading as Sphinx Manufacturing Co.), and Morris, T. March 21, 1916. Systems of charging and discharging condensers. -In an electric supply system particularly for use in ignition systems for internal-combustion engines, rock-blasting, &c., simultaneous sparking is obtained at two or more spark-plugs by connecting the insulated sides of the plugs to separate condenser elements e, f, the corresponding primary elements d<1>, d<2> being either formed together, or separate as shown, and supplied from a common source, such as the magneto b
Patent GB-712348-A (GB)
Title: Improvements in and relating to luffing gravity davits
Inventor: SCHAT MARINUS LEENDERT
IPC: B63B23/04
Filed: 1952-02-18
Abstract: 712,348. Davits. SCHATS DAVITS, Ltd. Feb. 18, 1952, No. 4207/52. Class 115 In a luffing davit comprising a bracket 15 secured to the deck of the ship and an arm composed of three substantially straight sections 4, 5, 6, forming together a Z-shaped rigid unit whose lower section 4 in the extreme inboard position of the arm encloses with the deck of the ship an angle approximately equal to that through which the arm is capable of swinging between its extreme inboard and its extreme outboard position, the bracket comprises two spaced interconnected beams 20, 21 extending on either side of the central section 5 of the davit arm in its extreme inboard position and in substantially parallel relation therewith, which beams are secured. to the deck close to the ship's side and support at least one sheave 13 for guiding the boat fall 11 and are braced by members extending in substantially parallel relation with the lower section 4 of the davit arm in its extreme inboard position so as to form a berth. adapted to laterally support the davit arm in said position. The arm is provided with wooden chocks 16 and 17 for laterally supporting the hull and keel of the stowed boat and has welded thereto a triangular cross beam 18, one face of which supports the keel of the boat in its stowed position and another engages a metal anvil 19 secured to the deck in the extreme outboard position of the arm. Means 23 are provided for locking the arm in its inboard position.
Patent GB-1000875-A (GB)
Title: Improvements in means for measuring the moisture content of sand and like granular or pulverulent material
Inventor: GODDING RONALD GEORGE
IPC: G01N22/04
Filed: 1962-02-03
Abstract: 1,000,875. Electric tests and measurements. BRITISH CAST IRON RESEARCH ASSOCIATION. Jan. 30, 1963 [Feb. 3,1962], No. 4234/62. Heading G1N. To obtain an accurate measurement of the mixture content of granular material such as foundry sand, the material is first compressed to substantially remove the large change in density produced by a change in moisture content and then an electrical property of the material is measured. In the device shown in Fig. 7 samples of sand passing along a conveyer belt are allowed to enter the tube 10 by gate 11, tube 12 is closed by piston 14 and piston 17 compressed the sand at a constant pressure above 300 lbs./sq.inches. The dielectric constant of the sand is thus measured using capacitor plates 19. Piston 14 is then removed so that part of the charge 18 is pushed out of tube 12 by piston 17 and is cut off by blade 13. A further charge is then allowed to enter the apparatus. Thus sequential testing may be carried out and a pneumatic circuit for operating the pistons automatically is described. The tube 12 may be of resin bonded glass fibre but if the electrical measurement is of U.H.F. attenuation a steel tube with waveguides built in may be used (Fig. 16 not shown). Fig. 15 shows a suitable circuit for U.H.F. measurements. Energy is supplied from source 33, through an isolator 34 and preset attenuator 35 to the sample 12. The U.H.F energy, which is modulated at audio frequency, then passes through a further attenuator 36 and a detector 37 to an audio frequency amplifier 38 which controls a servomotor driving the attenuator 26 to maintain the final signal constant. The sum of the attenuations at 12, 35 and 36 is thus constant and as moisture content is directly proportional to power loss in decibels the setting of attenuators 35 and 36 gives a direct measurement of moisture content. A temperature sensitive resistance may be included in the measuring circuit to compensate for the sand temperature and tube 10 may be heated to prevent sand sticking. The pneumatic control may be replaced by hydraulic or electrical apparatus.
Patent GB-553324-A (GB)
Title: Improvements in and relating to height gauges
IPC: G01B5/06
Filed: 1942-03-31
Abstract: 553,324. Linear dimension gauge. JOY, R. E., and RAY ENGINEERING CO., Ltd. March 31, 1942, No. 4276. [Class 106 (ii)] A height gauge having a base with a vertical bar or standard on which is mounted a carriage for the upper gauging member is provided with a link member to locate accurately the carriage with respect to the bar for the rough adjustment. As shown in Figs. 1 and 3 the carriage 14 is slidably mounted on a notched bar 11 supported by a base 10. The notches 13 in the bar are tapered and can be selectively engaged by the lower tapered end 52 of a link 50, the upper end of which is similarly tapered to engage a notch 40 accurately positioned on the carriage 14. The link is clamped in position by a clamping screw 53. A compression spring may be located between the rear of the carriage and the link and the carriage may be cut away in order to keep the link as short as possible. In the form shown the carriage has a forward extension 20 with a guide pin 22 serving as a support for an adjustable arm 23 and gauging member 27. The arm 23 carries a micrometer 30 the spindle of which bears a pad 32 on the extension 20. The arm 23 is forked at its rear end and is formed with pads 25 to engage bearing surfaces 26 on the carriage 14. The setting of the carriage may be viewed through an aperture 15 therein.
Patent GB-685813-A (GB)
Title: Improvements in heating devices for washing boilers and like liquid heaters
IPC: D06F1/08
Filed: 1951-02-22
Abstract: 685,813. Washing and like boilers. AKTIEBOLAGETELEKTROLUX. Feb. 22,1951 [Feb. 28,1950], No. 4308/51. Class 64 (i) Steam is supplied to heat the jacket 12 of a washboiler or like liquid heater 10 from a receptacle 17 heated by an electric immersion device 18 or by gas or other combustion means, a float chamber 23 being provided to control the supply of liquid to the receptacle so that the level therein is always above the surface of heating device 18. Steam enters the jacket through passage 15 and the condensate drains back through passage 16. A pipe 13 is led from the jacket over the open top of the heater 10 and injects steam below the level of liquid therein. The pipe at its highest point may discharge into the atmosphere at 14. The float chamber 23, which communicates with the receptacle 17 by a liquid seal 21 and by a pipe 22, has an overflow opening 26. In a modification, Fig. 3 (not shown), the float chamber pipes 21, 22 connect with a liquid receptacle which includes a spiral water tube heated by a gas burner, the spaces between the coils serving for the passage of the combustion gases.
Patent GB-549045-A (GB)
Title: Improvements in or relating to copying lathes
IPC: B23Q35/08
Filed: 1941-03-31
Abstract: 549,045. Cutting - screw propellers. BRITISH POWER BOAT CO., Ltd., and BRADBURY, W. P. March 31, 1941, No. 4319. [Class 83 (iii)] In a machine for cutting screw propellers the propeller 67 is mounted on a rotatable work holder with its axis, Fig. 1, at an angle to the axis of rotation so as to reduce the inclination to the face plate of the blade being machined, the tool having a controlled movement axially of the work holder so as to make a series of cuts across a blade face. The bed 10 supports a headstock spindle carrying a face plate 15 from which an arbor 16 projects at an angle of about 15 degrees to the spindle axis. The spindle is oscillated during operation through the angle required to generate one blade, the amplitude being controlled by dogs 39 on the face plate coacting with the reversing switch 38 of the driving motor. The spindle is connected by gearing 14 to a longitudinal shaft 18. A slide rest mounted on the bed comprises a bottom cross-slide 19 carrying a longitudinal tool slide 21 carrying the tool holder 22. This slide is operated by a compound cam 24 arranged on a transverse axis and driven by gearing 60 and bevel gearing 29 from the shaft 18, this gearing including a two-part gear 28, the parts of which are relatively adjustable to control backlash. The cam shaft is thus driven, for a three-bladed propeller, at three times the spindle speed. During a forward oscillation of the work the required axial copying movement is imparted to the tool by the cam 24 which is returned during the backward movement. A pinion 38 on the cam-shaft acts through a quadrant 54 to operate pawl-and-ratchet mechanism driving the cross feed-screw 44 to impart radial feed to the tool and to bring the roller on to a different part of the cam. The arbor has three keyways at 120 degrees for positioning successive blades. The tool may be inclined for cutting propellers with wide blades. The tool may be replaced by a milling-cutter driven by a motor on the tool-holder. The cam may be machined from a master blade by interchanging the positions of the tool and follower. In a modification, the compound cam may be replaced by a large cam having a number of pairs of cam surfaces 46, Fig. 6, each pair corresponding to one cut across a blade face, the face being finished after one revolution of the cam shaft. The movements of cam roller 47 are transmitted to the tool by lever mechanism. The shapes of the cams are preferably determined by setting up a master blade and scribing lines on cam blanks by a scriber fitted in place of the cam follower.
Patent GB-538530-A (GB)
Title: Improvements in or relating to the concentration of tin bearing minerals
IPC: B03D1/02
Filed: 1940-03-12
Abstract: 538,530. Concentrating ores. TUCKER. S., and MINERALS SEPARATION, Ltd. March 12, 1940, No. 4661. [Class 82 (ii)] A flotation process for the concentration of tin ores comprises the de-flocculation of the gangue by the addition of an agent such as an alkali or water glass, the use of a frothing agent containing a soap-forming fatty acid such as oleic acid or an alkali salt thereof or a sulphonated fatty acid, and the maintenance of the pH value of the circuit below 7, for example by the use of carbon dioxide as the flotation gas or as a constituent thereof.
Patent GB-115062-A (GB)
Title: An Improved Appliance for Retaining Blankets on Horses' Backs.
Inventor: WARNEFORD WETHERELL FRANCIS
IPC: A01K13/00
Filed: 1917-03-31
Abstract: 115,062. Warneford, W. F. March 31, 1917. Fastening horse blankets. Consists of an appliance comprising a pair of shoulder straps a, b clipping or otherwise fastening on to the front of the blanket A at d and joined to a median strap e passing between the fore legs. The strap e is furnished with one or more pairs of lateral extensions f which clip or otherwise fasten on to the lower edges of the blanket.
Patent GB-582162-A (GB)
Title: Improvements in thermionic valves adapted to operate at very high frequencies
IPC: H01J1/16
Filed: 1940-03-13
Abstract: 582,162. Thermionic valves. M-O VALVE CO., Ltd., and WARREN, G. W. March 13, 1940, No. 4724. [Class 39 (i)] The cathode of ultra high frequency thermionic valves is a helix 1 of thoriated tungsten wire, wound so that the convolutions are spaced very close to one another, as at 4. and ground on one side so as to present a substantially smooth face to an adjacent co-operating electrode, which may be a grid or anode 2 and may be outside or inside the cathode.
Patent GB-762596-A (GB)
Title: A combustion chamber, particularly for a gas turbine engine
Inventor: ALLEN SIDNEY
IPC: F23R3/08
Filed: 1954-02-18
Abstract: 762,596. Generating combustion products under pressure. ARMSTRONG SIDDELEY MOTORS, Ltd. Jan. 12, 1955 [Feb. 18, 1954], No. 4752/54. Class 51 (1). A combustion chamber for a gas turbine engine comprises an outer casing 10 and an inner flame tube 12, the wall of the flame tube comprising successive axially-extending sections 11 which overlap at their ends to allow cooling air to flow along the interior surfaces of the sections. The sections are spaced apart by spacing means 14 and the downstream end of each flame tube section is continued beyond the spacing means and then diverges at 16 towards the next section to such an extent that a cooling air flow of substantially constant velocity is produced. The combustion chamber in Fig. 1 comprises an annular outer casing and an annular flame tube, and the spacing means are corrugated metal strips. A second embodiment comprises a cylindrical outer casing and a tube type flame tube. Reference has been directed by the Comptroller to Specification 743,149.
Patent GB-1097864-A (GB)
Title: Improvements in or relating to harvesting machines
IPC: A01D41/14
Filed: 1965-02-03
Abstract: 1,097,864. Combine harvesters. TEXAS INDUSTRIES Inc. Feb. 3, 1965 [Feb. 12, 1964], No. 4780/65. Heading A1F. [Also in Divisions B5 and B8] A combine harvester comprises a pivotably mounted header 1 having pivotably mounted at either side feeler members 8 each arranged to actuate a control mechanism for header lifting cylinder 32 such that the header can be maintained at a substantially constant height. In the embodiment of Figs. 1 and 3 when a feeler member passes over a bump a transverse rod 18 (Fig. 3) carrying a bracket 38 is rotated in direction C through linkwork including a rod 13. This permits movement of a lever 20 linked to a rod 23 and thus allows the rod 23 to slide within a valve housing 24 under the action of spring 25 to bring ports 28, 30 into communication thereby causing fluid to flow from pump 33 to a cylinder 32. Similarly, when the feeler member contacts a depression in the ground ports 29, 28 will be in communication and fluid will flow from the cylinder to reservoir 35. Manual control is by levers 42, 47. When the lever 47 is moved in direction D (Fig. 3) arm 46 engages extensions 39 of brackets 38 to permit clockwise movement of arm 20 about rod 18 due to action of spring 25 and thus to bring ports 28, 30 into communication. When the header is raised to a transport position, the lever 47 is positioned so that arm 46 remains in contact with extensions 39 but with the port 28 not in communication with ports 29, 30. The lever 42 is carried by one of two rotatable plates 41 carrying the housings 24, and permits the height at which the header is to operate to be adjusted. In the embodiment of Fig. 5 each feeler member controls the operations of cylinders 32 through valves 50, 69, and 74. Upon the feeler member shown being raised a piston 55 is moved in the valve 50 to force fluid in pipe 58 to move a piston 71 mounted on sliding rod 72 in valve 69 to the right. Thus ports 28, 30 in valve 74 communicate and fluid flows  from pump 33 to the lifting cylinder 32. The setting of the feeler members may be varied by operation of a screw spindle and the header 1 is raised to a transport position by operation of lever 79 in direction G. In the embodiment of Fig. 7 the header comprises two parts pivotally connected by shaft 82 such that any unevenness in the ground surface will cause displacement of sliding rod 99 within valve 100 thus to bring port 28 into communication with either port 29 or 30. A further valve 103 normally has ports 28, 29 in communication and thus fluid will pass from pump 33 to the cylinder 32 or from the cylinder to a reservoir 35 due to displacement of the rod 99. Movement of lever 109 connects the pump directly with the cylinders 32. A valve 90 operable by lever 94 effects adjustment of wheel 84 relative to the divider by cylinder 88. The combine may be tractor mounted (Fig. 8, not shown) in which case the combine is pivotable about a pair of ground engaging wheels.
Patent GB-212252-A (GB)
Title: A process for manufacturing vat dyes
IPC: C09B3/18
Filed: 1924-02-26
Abstract: Vat dyestuffs, dyeing cotton in blue-violet or reddish-violet shades are prepared by the action of aluminium chloride either upon dibenzoylperylene, or upon a mixture of perylene and benzoyl chloride.  An example of each method is given; the products are purified by vatting in the presence of alcohol and reprecipitating by blowing in air.  Reference has been directed by the Comptroller to Specification 16271/10.
Patent GB-457575-A (GB)
Title: Improvements in or relating to snap fasteners
IPC: F16B2/24
Filed: 1936-02-18
Abstract: 457,575. Snap fasteners. BRIGGS MANUFACTURING CO., 11631, Mack Avenue, Detroit, Michigan, U.S.A. Feb. 18, 1936, No. 4951. Convention date, July 29, 1935. [Class 44] A snap fastener (particularly described as securing a motor-car upholstery trim panel P to a support S, Fig. 2), formed from spring wire &c., bent to provide outwardly bowed limbs 13 to snap past the edges of an aperture 10 in the support and outwardly turned freeends 16 by which the fastener is mounted on the panel &c., is anchored to the panel by means allowing the fastener to swing from an inoperative position parallel to the panel, Fig. 3, to an operative position at right angles thereto, Figs. 2, 7, and also allowing limited sliding movement of the end 16 in all directions parallel to the panel. As described, anchoring is effected by a plate 18 with rectangular aperture 19 through which the fastener is passed so that the parts 16 rest in recesses 22 formed by bending up portions of the plate, the fastener being secured by a flexible disc 23 held by lugs 24. The plate 18 is secured to the panel by prongs 20 diagonally disposed at the corners. The parts are dimensioned so that the ends 16 have limited movement longitudinally and transversely with respect to plate 18, to allow the fastener to align itself with aperture 10. The fastener may be turned down as in Fig. 3, for convenience in stacking &c., and is held against accidental displacement from the operative position by flats formed on opposite faces of the parts 16 and resiliently engaged by disc 23 and walls of recesses 22.
Patent GB-1451763-A (GB)
Title: Optical illumination system
IPC: G02B19/00
Filed: 1975-02-06
Abstract: 1451763 Printing apparatus RICOH CO Ltd 6 Feb 1975 [7 Feb 1974] 4995/75 Heading G2A An optical system for illuminating an original 1 which is to be progressively scanned while being driven at a constant speed by rollers 5a, 5b, 6a, 6b, comprises a mirror 9 shaped as a portion of an ellipse B having an elongate filament F of a halogen lamp 3 at one of its two foci and a slitlike zone A at the original 1 substantially at the other, a light shield and reflecting member 25 extending around the lamp 3 but not extending into the direct path of light passing from the lamp via the mirror 9 to the zone A and having reflecting surfaces 25b, 25c which co-operate with the mirror 9 to direct additional light from the lamp 3 to the zone A. The mirror 9 is a cold mirror reflector and is located by pins 23a, 23b on springs 22a, 22b in a recess 11a of a support 11  having heat dissipating fins. The reflecting surfaces 25b, 25c may be curved to ensure that the additional light is directed to the zone A. The original 1 extends over a transparent glass plate 2 and the light reflected from the original can be converted into an electrical signal in a facsimile system or directly used in a copying machine. The optical system may be moved relative to a stationary original.
Patent GB-582635-A (GB)
Title: Improvements in and relating to hydraulic machines for applying crown corks to bottles and the like
IPC: B67B3/02
Filed: 1944-03-17
Abstract: 582,635. Applying crown corks to bottles &c. FLOWER, SIR W. N., KING, J. W., HATCHARD, J. F. (trading as FLOWER & CO., J. W.), and BROOKS, J. L. March 17, 1944, No. 5041. [Class 125 (ii)] In a hydraulic machine for applying crown corks to bottles &c. adapted to ensure that both long and short bottles are subjected to crowning pressure for substantially the same period, a bottle lifting ram 15 is raised by hydraulic pressure from a pump 5, e.g., as described in Specification 222,753, [Class 125 (ii)], to position the bottle mouth in the crowning head 16, and a relief valve 20 carried by a body 9 is provided to restrict the pressure so that it is insufficient for crowning, timed controlling means being also provided to render the relief valve 20 ineffective after the bottle has been lifted to crowning position, and so to raise the pressure to that required for crowning. The machine includes an oil container 1, Fig. 1, the top 2 of which is the machine table and the bottom 3 of which contains a duct 4 connecting pump 5 with inlet valve 6, the cylinder of ram 7, the crowning relief valve 8 and the light relief valve 20. The light relief valve 20, Fig. 2, is screwed into the body 9. Spring 25 of valve 23 is of such strength that the valve opens when the hydraulic pressure is sufficient to bring the bottle mouth and the crown into light contact, but no more. Once in each cycle cam 10 depresses roller 28 and seats valve 27 and so blanks off the relief valve. The crown may be moved on to the bottle mouth instead of vice versa.
Patent GB-1044807-A (GB)
Title: Heat transferable sheets for use in thermographic processes
Inventor: NEWMAN DOUGLAS ALEXANDER
IPC: B41M5/382
Filed: 1964-02-06
Abstract: 1,044,807. Thermographic transfer materials. COLUMBIA RIBBON & CARBON MANUFACTURING CO. Inc. Feb. 6, 1964, No. 5086/64. Heading G2C. A thermographic transfer sheet comprises a heatconductive support on which is printed a heattransferable composition free of infra-red absorbing materials so that all four margins of the support are not printed on. In addition to leaving the margins clear, the transfer layer may only be printed on in the area which a reproduction is desired. The transfer layer may comprise a wax and a dye and be overcoated with a layer of beeswax or paraffin wax which is either tacky or becomes tacky on heating and is transferred on imagewise heat-exposure with the transfer layer. The support may be coated on the other side with an infra-red reflective layer such as a silver coating so that heat absorbed by the images of the original may be conducted through the coating and support to the transfer layer but infra-red radiation transmitted by the background of the original is reflected away.
Patent GB-846985-A (GB)
Title: Improvements in or relating to the manufacture of toy balloons and like articles made by dipping
Inventor: DAVIS FREDERICK LEWIS
IPC: B29C41/14
Filed: 1958-02-17
Abstract: 846,985. Moulding by dipping. LONDON RUBBER CO. Ltd. May 19, 1959 [Feb. 17, 1958], No. 5121/58. Class 87(2). A balloon 8 is removed from a dipping former 1 by endless bands 2, 3 driven by pulleys 5, 7 and pressed against the balloon by spring- urged rollers 12. The bands have a facing of cellular rubber (see Fig. 2, not shown). Specification 668,382 is referred to.