baber/WOPTO huggingface dataset:
Patent GB-497006-A (GB)
Title: Improvements in or relating to the manufacture of abrasive articles
IPC: B24D3/08
Filed: 1937-05-11
Abstract: In the manufacture of an abrasive article comprising abrasive grains bonded by means of a metallic bond, abrasive grains and a powdered metallic alloy or alloying metals containing an ingredient which melts at a lower temperature than the temperature of complete melting point of the alloy are mixed together and the mixture heated to a temperature above the melting point of the said alloying ingredient but below the temperature of complete melting of the alloy, pressure being applied to the mix during the heating process.  The melted ingredient forms the minor proportion of the alloy and the metals may be those capable of forming a solid solution alloy, the mix being heated to a temperature at which the melted ingredient diffuses into the unmelted metal to form a solid solution, such as mixtures of copper with aluminium and zinc.  The metals may be coated with a solution of a fluxing agent as described in Specification 494,300, e.g. with copper and copper base alloys or with nickel alloys the flux used is a solution of borax and boric acid.  In making metal bonded diamond wheels, a proportion of a softer abrasive such as silicon carbide, boron carbide or fused alumina may be added to the mix.  In the manufacture of a wheel a mixture containing 10 per cent of diamonds, 10 of silicon carbide, 72 of copper powder, and 8 of tin powder is moistened with an aqueous solution of borax and potassium fluoride.  Excess moisture is removed from the mixture which is then introduced into the outer part of an electrically-heated mould of the desired shape.  To form the inner portion of the wheel a mixture of 20 per cent of silicon carbide, 72 of copper and 8 of tin moistened with the flux is introduced into the rest of the mould, a paper separator being provided between the two mixtures.  The mixture is then subjected to pressure and heated to 750 DEG  C.  Specifications 349,732, 359,637, 386,539, [both in Group XXIII], 390,236, [Group II], and 479,703 also are referred to.
Patent GB-973045-A (GB)
Title: Improvements in or relating to gyratory crushers
IPC: B02C2/06
Filed: 1962-04-06
Abstract: 973,045. Gyratory crushers. SHEEPBRIDGE EQUIPMENT Ltd., and H. S. HALSALL. Feb. 14, 1963 [April 6, 1962], No. 13460/62. Heading B2A. A gyratory crusher comprises a shaft 25 provided with a circular mantle loosely encircled by a fixed crushing ring, a bearing supporting the upper end of the shaft in such a way as to permit the axis of the shaft to gyrate and means for varying the amplitude of the gyratory movement. The shaft is supported at its upper end by a hydraulically-suspended bearing of the kind described in Specification 973,044. The lower end of the shaft 25 projects through a hollow tapered boss 42, Fig. 2, which is provided in the base member 41 of the crusher and mounts a housing 44 for roller bearings 45, the outer races 46 of which engage the housing and the inner races 50 a tubular extension 47 of a hollow driving-pulley 48. Within the eccentric inner surface of a hollow interior rib 49 of the pulley is a cup-shaped part 51, whose inner face is eccentric to its outer face and supports the outer race 52 of a further self-aligning bearing 53 arranged with its inner race 54 encircling the lower end 35 of the shaft 25, to which it is splined at 56, 57. Thus there is no relative rotation between these parts, whilst axial movement of the shaft can take place during adjustment of the mantle and crushing ring. The part 51 includes an extension 58 having a flange 59 provided with holes 60, Fig. 3, registerable with holes 65 in the end of the pulley 48 and secured by screws 66. By securing the flange in different positions on the end of the pulley, the amplitude of gyratory motion applied to the shaft may be varied. The driving member may be withdrawn by eye-screws 68 in the annular plate 67 at the upper end of the housing. The pulley is rotatable by a belt, or, in a modification, is formed with a bevel-gear driven by a pinion extending out through bearings carried by the part 44, which in this case is made to extend below the part 42.
Patent GB-537913-A (GB)
Title: Improvements in or relating to photographic shutters
IPC: G03B9/42
Filed: 1940-08-26
Abstract: 537,913. Photographic shutters. KODAK, Ltd. Aug. 26, 1940, No. 13471. Convention date, Jan. 4. [Class 98 (i)] A photographic shutter comprises a pair of slidable plates adapted to be moved against spring tension to "set" position in which the following plate is held by a latch mechanism including a pivotally-mounted lever, the length of which may be adjusted, to vary the exposure, by means including a slidable bar connected to it by means which imparts the sliding movement of the bar to the lever but permits the latter to pivot relatively to the bar. As shown, the shutter is substantially of the kind described in Specification 534,063, in which the plates 4, 5 slide between rails 3 carried by a plate 2 at the front of the camera, and have rearward extensions 6, 7 the rear edges of which are spaced apart during the exposure to form a slot adjacent to, and travelling across, the exposure apertures. They are moved to the left against the action of a spring 10 in order to set the shutter by a lever 17 which is swung to engage a pin 20 on the leading plate 4, which pushes the following plate in front of it. In the set position the plate 4 is latched by a lever 22 which engages a lug 21 and the plate 5 is held by a latch 24 engaging a lug 23. The latch 24 is on the end of one portion 28 of a telescopic lever arm pivoting about a stud 34, the other portion 35 of the arm being formed with a downward projection 27. The plate 4 is released by rocking the lever 22 by the release button 25, and after moving a pre-determined distance the lug 21 on it strikes the projection 27 and so rocks the lever to unlatch the blade 5. The exposure is adjusted by varying the position of the projection 27, thus altering the position reached by the blade 4 when the blade 5 is released. For this purpose, the part 35 of the telescopic lever arm slides between a flange 30 and lugs 29 on the part 28, its position being adjusted by a sliding bar 44 having a pin 50 engaging in a slot 51 in the part 35, so that the bar 44 does not rock with the lever. The bar 44 is adjusted by a pinion 43a on the pivot 34, driven from a gear on the spindle of the speed-adjusting knob and engaging a rack on the upper edge of a slot formed in the bar. The shutter is provided with the mechanism for providing slow automatic exposure described in Specification 537,914.
Patent GB-965084-A (GB)
Title: Improvements in or relating to an electroluminescent device
IPC: H05B33/26
Filed: 1960-04-14
Abstract: In order to obtain optimum transmission of the radiated light and to reduce internal reflections, the thicknesses of the various layers of an electroluminescent light source are based on formulae derived from Maxwell's wave equations. In a lamp comprising the following layers on a metallic or metallized plastics foundation:-a first dielectric or semi-conductive, a phosphor, a noble metal or alloy and a second dielectric or semi-conductive layer, the foundation layer has a thickness of 2.9.10-2 m1., <FORM:0965084/C4-C5/1> cms., the electroluminescent layer, which can be of ZnS in a dielectric, a thickness of <FORM:0965084/C4-C5/2> units, the first dielectric layer a thickness of lambda.K.5.101/n <\>rA units and the noble metal layer, which may be of gold, a thickness of 2.9.10-2 <FORM:0965084/C4-C5/3> cms.  The second dielectric layer, which can be applied both to the metal layer and to the foundation layer, preferably has a thickness equal to the difference between that of the first dielectric layer and the noble metal layer.  In the above formulae, lambda is the wavelength of the emitted radiation, m1 and m3 are even integers, r  the resistivity, e r the dielectric constant, m 1 the permeability, n the refractive index, and K = e  - n2, in each case for the material of the relevant layer.  A layer of dielectric of thickness not greater than one-sixteenth of the thickness of the phosphor layer can be located between the phosphor layer and the metal layer.  An example is described in which the foundation layer is a plastic plate metallized with aluminium, the first dielectric layer is an epoxy or urea resin, the phosphor layer is ZnS in an epoxy resin, and the metal layer is gold.  Contacts are made to the gold layer by silver or graphite and leads attached thereto and to the metallic foundation layer.
Patent GB-135590-A (GB)
IPC: D06F91/00
Abstract: 135,590. Goold, L. W., (American Laundry Machinery Co.). Nov. 27, 1918. Jet apparatus.-In a mixing and agitating appliance for preparing starch, which is of the same construction as described in Specifications 135,591 and 135,588, [both in Class 121, Starch &c.], the starch mixture is circulated through the preparing vessel and a temperature-correcting device, and then is divided into two parts, one part re-entering the preparing vessel and the other part passing in a closed circuit through the starching-machines before re-entering the temperature-correcting device. The starch-preparing vessel A first receives a charge comprising a mixture of raw starch and water through the top, and additional water is then introduced into the bottom of the chamber from the main 21 by means of the valved pipe 19. Steam is then admitted through the valved pipe 24 to injector nozzles arranged tangentially in an upwardly-sloping direiction at the bottom of the chamber. The steam cooks the starch mixture and circulates it with a whirling motion up tho sides and down the centre of the chamber.
Patent GB-814818-A (GB)
Title: Epoxy resin compositions
Inventor: MACKENZIE JAMES BROWN DOUGLAS
IPC: C08G59/50
Filed: 1956-05-02
Abstract: Epoxy resin compositions which cure at room temperature comprise 4,41-diaminodiphenylmethane as hardener and a plasticizer for the resin which is itself free from epoxy and amine groups.  Suitable plasticizers are dibutyl phthalate, monoethyl ether of triethylene glycol ("ethyl trioxitol") and butyrolactone.  The epoxy resins are defined as the glycidyl ether reaction products of mono- or di-nuclear polyhydric phenols or of polyhydric alcohols with epichlorhydrin or its equivalent under alkaline conditions or acidic catalytic conditions with subsequent alkaline treatment.  In the example, a liquid mixture of 100 parts liquid epoxy resin, 27 parts hardener and 20 parts dibutyl phthalate, solidifies in about 48 hours and is cured after 4 days at 25 DEG  C.  Specification 791,836 is referred to.
Patent GB-214850-A (GB)
Title: Improvements in or relating to gas heated smoothing irons
IPC: D06F75/02
Filed: 1923-05-23
Abstract: 214,850. Tognetti, T. May 23, 1923. Atmospheric gas burners; burners, mounting; burners, applications of.-A hollow body 1 provided with a hinged cover 3 secured by a rotatable catch 30, 31, is heated by a gas burner 24' supplied through a bent pipe 10 secured to the rear wall of the iron by a resilient flange 13. The gas is led in through a tube 24 and screwdown valve 22 and air is admitted through holes in the pipe 10 controlled by a perforated collar 15. The burner is covered by gauze 26 held in place by a frame 28 attached by a screw 27.
Patent GB-1093886-A (GB)
Title: Improved electric power plant
Inventor: AUGUSTIN HEINZ
IPC: H02J3/08
Filed: 1965-03-31
Abstract: 1,093,886. Electricity supply systems. LICENTIA PATENT - VERWALTUNGSG.m.b.H. March 31, 1965, No. 13656/65. Heading H2H. An electricity supply system comprises a plurality of A.C. generators 11 which are connectible to a common network 14 each of the driving members 10 for the generators being individually controlled according to the generator speed when the generator is not connected to the network but which driving members are all controlled by a common signal determined by the speeds of and the loads on all the generators when these are connected in parallel to the network 14. Each driving member 10 such as a diesel engine drives a tachometer generator 19 giving a speed proportional signal which is fed via a transmitter 26 to an individual regulator 21 and a common master regulator 24. Each individual regulator 21 controls the fuel supply to its associated diesel engine by way of a switch 22 and a control member 20 to regulate the speed of the engine. When the paralleling switches 13 and the switches 16 connecting the exciters 15 to a balancing line 17 are closed the generator loads at the points 23 produce signals which are fed to the master regulator 24 by way of power sensitive units 25 which units cause the switches to assume their alternative positions whereby the fuel supplies to all the diesel engines are controlled by a signal generated by the master regulator 24. The direct control line between each transmitter 26 and control member 20 allows a direct response to cut off the fuel supply in an over-speed emergency. If desired the switches 13, 16, 22 may be ganged together. In a further embodiment each regulator 21 and control member 20 are replaced by a single member which member may receive both speed and power signals before the associated generator is connected to the network but which is not utilized when the master regulator is controlling the generators. Certain features disclosed in the Specification are similar to those disclosed in Specification 1,093,085.
Patent GB-136840-A (GB)
IPC: H01H85/15
Abstract: 136,840. Perfect Re-fillable Fuse Inc., (Assignees of Muller, W. F.). Dec. 18, 1918, [Convention date]. Fusible cut-outs of the plug or cartridge type are constructed so that the fuse-wire, when blown, is easily replaceable, and an unsuitable fuse cannot be inserted. As shown in Fig. 1, a plug fuse having a hollow insulating- body 24 is fitted with a loose metal plate 13 normally held against a shoulder by a spring 15 and a screwed-on cap 9. One end of the fuse-wire 11 passes through a hole in the plate and under the head of a screw 12.. The other end of the wire passes through a hole 20 in the body 24 and under the head of a screw 10, which constitutes one of the outer terminals. A fuse-wire is inserted by removing the cap and spring, raising the plate 13, bringing the wire up through both holes and attaching its upper end by the screw 12, and finally drawing the plate back into its normal position and attaching the lower end of the wire by the screw 10. The holes are made of such sizes that unduly large fuses-cannot be inserted. A rubber cushion may be used instead of the spring 15. The invention is also described in application to a cartridge fuse.
Patent GB-284516-A (GB)
Title: Improvements relating to reflecting signs
IPC: G09F13/16
Filed: 1927-05-21
Abstract: 284,516. Edwards, W. F. May 21, 1927. Reflectors. - Reflecting devices comprising a glass front portion 1 and a metal back plate 2 are adapted to be secured to their supports 3 by a screw &c. 8 passing through the back plate 2. The edge 5 of the back plate is provided with prongs or projections 6 which are bent down over the glass 1 after the back plate is secured in position. The glass may be coloured, e.g. red, and have its back surface 4 silvered.
Patent GB-143552-A (GB)
Title: Reservoir with safety apparatus for storing and distributing inflammable liquids by means of a compressed inert gas
IPC: B67D7/32
Filed: 1920-05-19
Abstract: 143,552. Millot, M. F. May 20, 1919, [Convention date]. Direct gas - pressure apparatus, automatic. -An apparatus for safely storing and distributing inflammable liquids has its reservoir at atmospheric pressure while distribution is effected by the pressure of an inert gas applied to a small quantity of the liquid in an auxiliary vessel. In the construction shown in Fig. 1, the reservoir A is filled through a pipe H, the vapour escaping by the float gauge pipe F with its indicator V through a non - return valve S'. An auxiliary chamber B immersed in the liquid has a non-return flap valve S. Ir action, the three-way cock R, communicating with the compressed inert gas in the cylindet G, is opened so that the gas exerts pressure through the tube D on the liquid in the chamber B and forces it up through the tube C to the measuring chamber E. When the desired quantity has been forced into the chamber E as shown by the gauge glass, the cock R is turned, cutting off the cylinder G and allowing a clear run through the tube D. The column of liquid in tube C falls back to the chamber B while any gas in the chamber E under pressure escapes through the pipe F and the valve S'. The liquid is now drawn off through the flexible tube K.
Patent GB-1136114-A (GB)
Title: Device for drawing off the thread commencement on textile thread packages
IPC: B65H67/08
Filed: 1966-03-29
Abstract: 1,136,114. Drawing off thread commencement. W. REINERS. 29 March, 1966 [3 April, 1965], No. 13834/66. Heading D1J. A suction nozzle 4 used for drawing off the thread commencement of a yarn package 1 is assisted by gripper elements 6, 6<SP>1</SP> that periodically group the thread during drawing off, the gripper elements being in the suction air current. The gripper elements may be swingingly mounted, periodically interengaging members that grasp the thread by temporarily looping the thread between them.
Patent GB-568306-A (GB)
Title: Improvements in or relating to electrical resistances
IPC: H01C1/084
Filed: 1943-08-28
Abstract: 568,306. Metal strip resistances. BROOKHIRST SWITCHGEAR, Ltd., and HARRIS, R. C. Aug. 28, 1943, No. 14076. [Class 37] An electrical resistance device comprises a flat strip of resistance material folded across its width at an angle at spaced intervals along its length, with each strip member thus formed spaced from its neighbour, so as to form an expanded coil-like structure in which the edges of the strip members face inwardly and outwardly with respect to the axis of the coil, and an insulated core or supporting member located within said coil-like structure and having means engaging the inner edges of the strip members to maintain the spaced apart relationship thereof. The resistance is formed from metal strip 10, Fig. 2, which is folded at 45 degrees at intervals along its length as at 11 to form a coil-like body of square form, leaving the ends 13 for the attachment of terminals. The resistance may be mounted on slotted insulating rods 16, Fig. 3, which may be in sections. Alternatively a grooved rod or one with slotted corners may be used, Figs. 5 and 7 (not shown). To provide for a tapped resistance, Fig. 10, resistance wire 19 is folded into the coil during manufacture leaving loops 20 at the corners suitable for making tap connections. Alternatively, the central core may be dispensed with and the resistance may be supported on insulated rods passed through the loops 20 with mica washers between the loops, the whole being clamped by end nuts..
Patent GB-836141-A (GB)
Title: Improvements in or relating to electrically heated vacuum furnaces
IPC: H05H1/00
Filed: 1957-05-03
Abstract: 836,141. Discharge apparatus. STAUFFER CHEMICAL CO. May 3, 1957 [July 27, 1956], No. 14108/57. Class 39(1). [Also in Group XI] Apparatus for heating a crucible (see Group XI) includes an annular directly or indirectly heated cathode 21 surrounding a crucible 15 and a glow discharge is set up between them, argon being supplied through a pipe 27<SP>1</SP> to maintain such a pressure, e.g. a few microns in a chamber 11 containing the crucible and cathode as to supply ions, which prevent the glow discharge passing into an arc and tend to neutralise the space charge. The cathode 21 is surrounded by heat shields 47. The walls of the chamber 11 may be of conducting material and if maintained at cathode potential serve as focusing electrodes.
Patent GB-1455131-A (GB)
Title: Mixing apparatus record player pick-up arm retaining clip
IPC: B01F11/00
Filed: 1973-03-23
Abstract: 1455131 Mixing apparatus RUBBER & PLASTIC RESEARCH ASSOCIATION OF GREAT BRITAIN 20 March 1974 [23 March 1973] 14125/73 Heading B1C A mixing apparatus comprises a mixing chamber 12 adapted to receive a first material, a rotary stirring device 48 adapted to be reciprocated axially within the chamber and means for introducing a second material into 'the chamber at a location which is adjacent to and is arranged to move with the stirrer. The second material is introduced via line 56, rotary coupling 54, hollow shaft 50 and apertures 58 therein which cooperate with a spring-loaded valve member 60. The apparatus may be used for introducing a mixing and curing agent into a mixture of liquid rubber and carbon black the latter being prepared in a mixer 10 and pumped to an accumulator 18 from which successive batches are admitted via line 20 and valve 22 to chamber 12. Chamber 12 is sealed at one end by a piston 26 which can be moved axially to discharge the mixture by a pair of fluid pressure rams 28. For Figure see next column
Patent GB-772173-A (GB)
Title: Improvements in the copolymerisation of vinyl compounds
IPC: C08F214/06
Filed: 1952-06-04
Abstract: Copolymers of vinyl and vinylidene chloride are made by polymerizing a mixture of the monomers in aqueous emulsion in the presence of two polymerization catalysts of which one is an azo compound in which the two free nitrogen valencies in the group -N­N- are attached to different carbon atoms and the other an inorganic peroxy compound. Catalysts mentioned are azodiisobutyronitrile, methyl azodiisobutyrate, azodi - (phenylpropionitrile), hydrogen peroxide and ammonium persulphate.  The emulsifier may be a sodium alkylsulphonate buffered to a pH of 7.
Patent GB-253137-A (GB)
Title: Improvements in and relating to means for lubricating internal-combustion-engines
IPC: F16N13/18
Filed: 1926-06-04
Abstract: 253,137. British Thomson-Houston Co., Ltd., (Assignees of Compagnie Francaise pour l'Exploitation des ProcÚdÚs Thomson- Houston). June 4, 1925, [Convention date]. Force-feed lubricating.- Lubricant supplied centrifugally from a ring 8 to the big-end 9 of the hollow connecting-rod 2 of an internal-combustion engine is forced to the small end through the rod by a plunger 1 which reciprocates in the rod due to its inertia. An axial passage 5 through the plunger is controlled by valve 6 and communication with the big end is controlled by a valve 4. Lubricant entering a chamber 14 in the gudgeon pin 12 through a hole 13 is discharged through a nozzle 15 extending into a slot in the cylinder wall and returns to the supply tank.
Patent GB-859192-A (GB)
Title: Sintered hard metal alloy
IPC: C22C29/00
Filed: 1957-05-03
Abstract: A sintered hard metal alloy has a composition in per cent by weight, in the following range:  Titanium carbide 30-45.  Tantalum and/or niobium carbide 1-3. Bonding metal e.g. iron nickel or cobalt 8-11. Tungsten carbide the remainder.  The alloy containing gamma phase consisting of a solid solution of tungsten carbide and tantalum carbide and/or niobiub carbide in titanium carbde, beta phase consisting of bonding metal and possibly, alpha phase consisting of tungsten carbide, the volume per cent of the phases being governed by the following relationship.  100-beta \sFgamma>100-1.5 times beta.