baber/WOPTO huggingface dataset:
Patent GB-699746-A (GB)
Title: Improvements in and relating to magneto-responsive devices
IPC: G05B1/02
Filed: 1950-09-26
Abstract: 699,746. Electric control systems. BRITISH THOMSON-HOUSTON CO., Ltd. Sept. 26, 1950 [Oct. 19, 1949], No. 23569/50. Class 40 (i) [Also in Group XXXIX] A magneto-responsive device, in which an output voltage is derived in accordance with a varying magnetic field which passes through a semiconductor element carrying current, has the pole pieces of the magnet separated by a narrow gap containing the semiconductor element, and the field is varied by relative movement between the pole pieces and the element. In Fig 1 the resistance of a strip of semiconductor material 2 such as N or P type germanium is varied by a variable cross magnetic field applied through pole pieces 5 and 6 and the resulting voltage variation across resistance 18 is applied to valve 19 and used to control indicating or control device 21. The magnetic field may be varied by a signal source 14, and the magnet 4 may be moved away from the semiconductor strip 2 by a linkage 12 according to the position of a body 9. Alternative arrangements are described in which a thin piece of semiconductor material is supported between two pieces of insulating material which lie between the magnetic poles. Fig. 3 shows a further arrangement in which a point contact electrode 29 is arranged to contact the semiconductor 16 which lies between pole pieces 5 and 6 as before, so that the arrangement involves a rectifying effect and has increased sensitivity to variations of magnetic field. In the Fig. 3 arrangement. alternating current may be passed through semiconductor unit 2, in place of the direct current provided by battery 17 in Fig. 1.
Patent GB-629713-A (GB)
Title: Improvements relating to ceramic dielectric compositions
IPC: C04B35/465
Filed: 1947-08-26
Abstract: A ceramic dielectric composition consists of a mixture of magnesium and zinc titanates whereby reduction of magnesium titanate during firing is prevented.  The final composition may contain from 5 to 95 per cent of zinc titanate.
Patent GB-360064-A (GB)
Title: Improvements in and relating to electric time relays
IPC: H01H71/44
Filed: 1930-08-06
Abstract: 360,064. Electromagnetic relays. INTERNATIONAL GENERAL ELECTRIC CO., Inc., 120, Broadway, New York, U.S.A.-(Assignees of Allgemeine Elektricit'its-Ges. ; 2, Friedrich Karl-Ufer, Berlin.) Aug. 6, 1930, No. 23590. Convention date, Aug. 6, 1929. [Class 38 (v).] Retarding and time-limit devices.-An electromagnetic relay is provided with a winding. r adapted on energization to raise a core s which is linked to a pivoted arm t formed with a toothed sector adapted to engage and drive a clockwork retarding gear g. The final driven member of the clockwork gear consists of an escapement wheel w co-operating with an escapement lever c. The movements of the escapement lever are, however, according to the invention controlled by a resilient member e anchored at one end b and carrying at its free end a weight a shaped to engage a resilient member d attached to the escapement lever c. Thus the retarded operation of the relay is timed accurately by the vibration of the resilient member e with its attached weight a.
Patent GB-1510334-A (GB)
Title: Process for recovering dialkylaluminium halides from mixtures containing soluble zinc
IPC: C07F5/06
Filed: 1975-05-30
Abstract: 1510334 Recovering dialkylaluminium halides TEXAS ALKYLS Inc 30 May 1975 [17 June 1974] 23592/75 Heading C2J A di-(C 1-6  alkyl) aluminium halide is recovered from a mixture thereof with soluble zinccontaining compounds by heating the mixture under an inert atmosphere at 150-240‹ C. for a period of time sufficient to reduce the concentration of zinc-containing compounds to not more than 200 p.p.m. zinc and subsequently distilling the dialkylaluminium halide from the mixture in an inert atmosphere. The mixture may be in the residue left after distillation of dialkylzinc from the reaction mixture provided by one of the following reactions:- or
Patent GB-226292-A (GB)
Title: Improvements in or relating to riding saddles
IPC: B68C1/00
Filed: 1923-09-22
Abstract: 226,292. Oram, S. Sept. 22, 1923. Drawings to Specification. Materials.-The knee-flaps, pommel, seat or other parts are covered, provided with, or formed of crepe rubber, preferably finished to look like leather. The crepe is preferably solutioned to the leather through the medium of thin canvas or the like. The saddle seat, and/or the flaps may be formed entirely of crepe, with or without padding. Insertions of crepe may also be used.
Patent GB-240465-A (GB)
Title: Improvements in internal-combustion engines
IPC: F02B25/00
Filed: 1925-09-23
Abstract: 240,465. Chavas, M. J. C. Sept. 23, 1924, [Convention date]. Void [Published under Sect. 91 of the Act]. Two-stroke-cycle engines.-The out-stroke is divided into three phases a power phase for onethird to two-fifths of the stroke, an exhaust phase for one-fifth or one-quarter of the stroke, and admission for the remainder of the stroke, the charge being drawn in. Compression occurs during the whole of the return stroke. The admission and exhaust are mechanically controlled.
Patent GB-927489-A (GB)
Title: Esters of pyromellitic acid and polyvinyl compositions containing them
IPC: C07C69/76
Filed: 1959-07-10
Abstract: A plasticized composition comprises a resinous polymer, of which at least 50% by weight is constituted by polymerized vinyl chloride units, and a plasticizing amount of one or more tetraalkyl pyromellitates in which the alkyl groups, which may be the same or different, contain from 6 to 8 carbon atoms each.  The resinous polymer may be a homopolymer of vinyl chloride or a copolymer of vinyl chloride with at least one vinyl ester of an aliphatic monocarboxylic acid containing from 2 to 4 carbon atoms, vinylidene chloride or an alkyl ester of acrylic or methacrylic acid. Copolymers containing at least 85% vinyl chloride are preferred.  The plasticizers are incorporated in the polymers by mixing the powdered resin with the liquid plasticizer followed by mixing and/or kneading and then curing at an elevated temperature, for example of 150 DEG -200 DEG C.  In conjunction with the plasticizer there may be employed fillers, lubricants, pigments and stabilizers such as organo tin compounds like dibutyl tin dilaurate.  Other plasticizers such as di(2-ethylhexyl) phthalate, dioctyl adipate, tetraoctyl phosphate, polymeric plasticizers or epoxides may be present.  Anti-oxidants such as phosphites, amines and phenols may be added.ALSO:The invention comprises tetra-alkyl pyromellitates in which the alkyl groups, which may be the same or different, contain from 6 to 8 carbon atoms each, in particular tetra (2-methylpentyl), tetra-(2-ethylhexyl), and tetra-(2,2-dimethylpentyl) pyromellitates and like compounds derived from a C6, C7 or C8 oxo alcohol.  The novel compounds may be made by the reaction of pyromellitic acid or the anhydride and the appropriate alkanols.  The alkanols may be employed single or in mixtures of alkanols having the same or different carbon content. Mixtures of branched chain alkanols may be obtained by the oxo process.  The esterification may be effected with 10 to 100% excess of alkanol at 200 DEG  to 250 DEG C. with an esterification catalyst, such as sulphuric acid, and, if desired, a low boiling solvent as a water entrainer.  In addition to the above-mentioned compounds, detailed examples describe tetra-(2,3-dimethylbutyl)-, tetra (2,2-dimethylbutyl)-, tetra-(n-hexyl)-, tetra (2,2-dimethylhexyl)-, tetra (2,2,4-trimethylpentyl)-, tetra (2-ethyl-4-methylpentyl)-, tetra (2,4-dimethylpentyl)-, tetra (2-ethylpentyl), tetra (methyl pentylcarbinyl)-, tri (2-ethylhexyl)-2-methylpentyl, di(2-ethylhexyl)di(n-octyl-, di(2-ethylhexyl) di(2-methylpentyl-, and di(n-hexyl)di-(2-methylpentyl)-pyromellitates.
Patent GB-924558-A (GB)
Title: Improvements in or relating to resilient axle suspensions
IPC: F16F1/38
Filed: 1959-07-10
Abstract: 924,558. Road-vehicle suspensions; rubber springs. HENDRICKSON MFG. CO. July 10, 1959 [July 17, 1958], No. 23852/59. Addition to 735,166. Classes 108(2) and 108(3). The resilient mountings between the axle support and the chassis frame in the parent Specification are replaced by rubber sleeve type mountings having at least one intermediate rigid sleeve 41 (Fig. 4). As shown, two mountings, one bearing on top of the other, are disposed on a pin 18 formed by the exterior of 9 common tubular member rigid with the frame 12. The mountings are retained by an annular member 49 on the pin 18 and abutments 46, 47 in an aperture in the axle support member 21. The latter has a bearing 34 for a transverse shaft 36 carrying a beam 22 at the ends of which respective axles are mounted. The shaft 36 is common to the suspensions on both sides of the vehicle. In operation, as load increases, a flange portion 17 rigid with the chassis frame, engages the top of the intermediate rigid sleeve of the uppermost mounting. Load is then borne wholly by the outer resilient sleeve of each mounting. In the modification shown in Fig. 9, the two mountings are replaced by a single one and there are two rigid sleeves 102, 103 which are engaged successively by the flange 17. The coaxial resilient sleeves may be of different thickness (Fig. 8 not shown). The pin 18 may alternatively be carried by the axle support 21 (Fig. 10, not shown). The axle support 21 may carry a single axle (Fig. 12, not shown) instead of tandem axles.
Patent GB-1154669-A (GB)
Title: Lifting Cradles.
Inventor: WALLENIUS LARS GUSTAV
IPC: B66C1/10
Filed: 1968-05-20
Abstract: 1,154,669. Counterbalanced lifting-cradles. L. G. WALLENIUS. 20 May, 1968 [18 May, 1967], No. 23858/68. Heading B8H. [Also in Division E2] A cradle for lifting building materials into the spaces between adjacent floors and tall buildings comprises a load supporting portion 1, Fig. 1, and a counterweight 8 supported by pivoted arms 7 and a cable. When the cradle is unloaded the weight is adjusted to the position shown at A, Fig. 4, and the cradle adopts a horizontal position. The weight is lowered to the position shown at D, C, E, Fig. 4, when the cradle is loaded. Wheels 20, Fig. 1, allow the cradle to run along a floor as it is lowered. The cradle is loaded by sliding bars 19 out of lugs 10 and lowering it over a palletized load. Adjustable L-shaped clamping bars 25 are provided for loads which do not fill the cradle. A door 5 is provided with latches, Fig. 6 (not shown).
Patent GB-1191283-A (GB)
Title: Improvements in or relating to Cameras
Inventor: HOLLEY JOHN ERNEST FOSTER
IPC: G03B15/04
Filed: 1966-05-27
Abstract: 1,191,283. Film transport. HOLTRONICS Ltd. May 25, 1967 [May 27, 1966], No.23866/66. Headings G2A and G2E. Film transport in a camera is effected step-bystep by means of an oscillatory solenoid operating through a one-way clutch. The film is carried in a magazine 4, and winds past an aperture 5. When the magazine is fitted into the L-shaped camera 1, the aperture 5 is located behind the objective lens 2. The film is driven by a sprocket 9, see also Fig. 7 (not shown), itself driven by a rotary solenoid 11 mounted on the outside of the magazine. Between solenoid and sprocket is a uni-directional clutch (as at 39, 40). When the solenoid is energized, it rotates the sprocket sufficiently to feed the film on by one frame, and the solenoid armature is then spring-returned independently. The shutter is a plane metal plate, operated by a further solenoid. Power is supplied via plugs 17 and 19. In the modification of Fig. 9, the rotary solenoid 11 and the clutch 27 are mounted on the camera itself, and the drive spindle 33 from the clutch connects to the drive spindle 28 of the sprocket 9 by plug and jack means.
Patent GB-675114-A (GB)
Title: Three axle driving bogie for rail vehicles
IPC: B61F3/06
Filed: 1949-09-16
Abstract: 675,114. Railway-vehicle bogies. SOC. ANON. DES ATELIERS DE SECHERON. Sept. 16, 1949 [Sept. 20, 1948], No. 23943/49. Class 103(vi) A three-axle driving bogie for a rail vehicle has each axle driven by a pair of electric motors, via torsion rods 7, Figs. 1, 2, extending through the hollow rotor shafts of the motors, universal joints 8, and toothed gears 9, 10. The gear case 11 is supported on the axle 13 by means of a roller or plain bearing 12 and is kept in position by a torque bar 14. A bolster 15 which may be longitudinally or transversely disposed of the vehicle, is supported .by the bogie frame 16, and rigidly or resiliently houses a socket 19 provided on a centre pin 18. The frame 17 bears via slide plates 20 or rollers, on four points of the bogie frame by means of leaf springs 21. Owing to the spherical shape of the suspension surfaces and to the resilient support, the main frame 17 can adjust itself obliquely with respect to the bogie frame 16. The motors may be raised or lowered independently of the bolster 15 on a serrated plate 23, Fig. 5 (not shown), on the transverse beams 22, or two motors may be connected to form a unit by fixed ribs 24 and a detachable rib 27. In this latter case, Fig. 3, the motors rest on the transverse beams 22 by means of feet 25 and may be raised or lowered in level by shims 26. Other forms of drive may be used, e.g. a hollow shaft drive wherein the hollow shaft surrounds the driven axle.
Patent GB-436613-A (GB)
Title: Improvements in bedstead fittings
IPC: F16B12/58
Filed: 1934-08-20
Abstract: 436,613. Bedstead corner fittings. WATKINSON, H. E., 40, Abbott Street, Launceston, Tasmania, Australia. Aug. 20, 1934, No. 23948. [Class 52 (ii)] [See also Group XXV] A bedstead corner fitting comprises a bracket 7, Fig. 2, which is chambered to receive a nut 8 having one inclined side which bears against one side of the chamber, and a bolt 9 passed through the side rail 10 and into the nut 8. Fig. 4 shows a modification in which an angleiron side rail 10 is used. In the form shown in Fig. 6, the side rail 10 enters a box-like bracket 7, and the nut 8 bears against one side of an aperture in one wall of the bracket and against a pin 15 passing vertically through the rail 10.
Patent GB-270556-A (GB)
Title: Improvements in brake control valves
IPC: B60T15/04
Filed: 1926-09-28
Abstract: 270,556. Marks, E. C. R., (Christensen Airbrake Co.). Sept. 28, 1926. Fluid-pressure.-A control-valve for fluid-pressure brake systems of vehicles comprises a piston 27 carrying an exhaust valve 11 which is seated by a spring 40 to close the exhaust passage 9 when the piston is first moved by the operator to apply the brakes and independent of which the piston is adapted to be moved further to open the inlet valve 12 by its stem 24 or the piston may move to permit the closing of the inlet valve while the exhaust valve is still closed. The piston 27 is subject to the pressure introduced into the control-valve casing by the inlet valve 12 and is operated on by the foot pedal 51 through the medium of a spring 32 so that under the influence of this pressure, after movement of the piston to apply the brakes, it is returned against the pressure of the spring to lap position with inlet and exhaust valves closed. In normal position the exhaust valve 11 is retained open by a flange thereon coming in contact with a flange 37 at the end of the bore in the piston in which the valve is contained. The port 8 communicating with the cylinders is thus open to the atmosphere. The pedal 51 is adapted to engage the piston 27 positively by means of a screw 61 secured in the piston. The head of the screw engages in the bore of a plunger 31 connected to the pedal and abuts against a flange in this bore when the plunger moves outwardly, thus ensuring the withdrawal of the exhaust valve from its seat. The piston comprises two parts between which is clamped the packing disc 30. The inlet valve pin 24 is tapered gradually to increase the port area on the valve being opened.
Patent GB-1460198-A (GB)
Title: Method of making an electric motor armature
IPC: H02K1/26
Filed: 1974-05-30
Abstract: 1460198 Making armatures BRIGGS & STRATTON CORP 30 May 1974 [3 Dec 1973] 24014/74 Heading B3A [Also in Division H2] A method of making an electric motor armature formed from a stack of punched laminations each of which has a circular row of substantially T-shaped teeth 11 defining its circumference, comprises deforming the heads 10 of the teeth on a plurality of the endmost laminations at both ends of the stack by bending the extremities of the heads inwardly with a progressively lesser curvature on the inwardly successive laminations to taper and thereby enlarge winding receiving slots formed by the teeth 11. The motor commutator 9 is first press fitted to a shaft 8 and a plastics shield 15 is placed on the shaft with the shield hub 17 facing the commutator. A further shield 15 and the stack of laminations are placed between shaping rings 22, 23 of a press and the shaft 8 is inserted in the bore of the lamination stack. The press is then actuated and fingers 24 on the rings 22, 23 enter the spaces between the teeth 11 while wedges 25 on the fingers deform the heads 19 of teeth 18 of the shields thereby deforming the endmost laminations of the stack. The action of the press also compresses the stack so that longitudinal ridges (20) on the shaft 8, Fig. 6 (not shown), bite into the laminations to key them to the shaft.
Patent GB-1298176-A (GB)
Title: Nitride-strengthened, stainless steel
IPC: C22C38/50
Filed: 1971-04-19
Abstract: 1298176 Nitride strengthened stainless steel ALLEGHENY LUDLUM INDUSTRIES Inc 19 April 1971 [9 March 1970] 24075/71 Heading C7A An article comprising at least one layer of a nitride strengthened stainless steel containing particles of a metal (e.g. Al, Nb, Ti or V) nitride, having a free energy of formation greater than -21, 000 cal/mole at room temperature, with an inter-particle spacing of no more than 10 microns, has its high temperature properties improved by (a) warm working and (b) annealing at not less than the germination temperature of the steel. This treatment gives a micro-structure of elongated primary grains which contain twins and sub-grains, with enough of the primary grains being over 20 microns wide and 40 microns long to give the required improvement in properties (e.g. at least 20% of the micro-structure comprises the elongated grains). A suitable steel comprises 0À026%C, 0À29% Mn, 0À49%Si, 18À33%Cr, 13À5%Ni and 1À95%Ti (present as 3À85% by volume of TiN), the balance, apart from impurities, being Fe. Other layers may comprise Ni based precipitation hardenable or corrosion resistant alloys.
Patent GB-1344109-A (GB)
Title: Two terminal constant current circuit
IPC: H01L27/07
Filed: 1971-04-19
Abstract: 1344109 Amplifier RCA CORPORATION 19 April 1971 [18 March 1970] 24177/71 Heading H3T [Also in Division G3] A constant current device comprises two terminals with the source-drain path of a fieldeffect transistor 38 connected therebetween, resistive means coupling the drain and gate of the field-effect transistor and at least one further field-effect transistor 34 with its gate connected to its drain connected between the gate and source of the field-effect transistor to operate with said resistive means to bias the field-effect transistor into substantially constant current operation for a range of voltages applied to said terminals. The resistive means may be a resistor (102, Fig. 3c, not shown) or a field-effect transistor 32 with its gate and drain strapped. The device may be used as a load for a further field-effect transistor 30 and cascaded with like arrangements 33, 52, 44, 46, 40, &c. The arrangements may be integrated into a single monolithic chip. Loop 1 gain may be determined by the resistances of feedback field-effect transistors 58, 56. Alternatively, a field-effect transistor (64, Fig. 2, not shown) may have its drain-source path in parallel with that of transistor 30 and the drain-source path of transistor 56 connected between its gate and the drain of transistor 42. The capacitor 60 may be external to the integrated circuit.
Patent GB-1328961-A (GB)
Title: Dense carbide composite bodies and method of making same
IPC: C22C29/00
Filed: 1968-05-21
Abstract: 1328961 Sintered carbides (boron, silicon) CARBORUNDUM CO 21 May 1968 [22 May 1967] 24261/68 Headings C7A, C7D [Also in Divisions C1, F3] A dense, composite, ceramic body useful as armour, consists of boron carbide, silicon carbide, and at least 3% by weight of free silicon. A process for making the body comprises preparing an initial mixture of granular boron carbide and a temporary binder; forming the initial mixture into a desired shape by pressing, extruding, investment or slip casting, setting the temporary binder to impart sufficient coherence to the shaped green body to permit further processing; and siliconizing the green body by heating it in an inert atmosphere or vacuum and in contact with a controlled amount of silicon to a temperature above the melting point of silicon, viz between 1500‹C and 2200‹C. The molten silicon infiltrates the body and reacts with some of the boron carbide to produce silicon carbide in situ, interstices in the body between the remaining boron carbide and the silicon carbide being permeated by free silicon. The binder may be polyvinyl alcohol. The initial mixture may also contain carbon which serves as a further source of silicon carbide by reaction with the molten silicon. This carbon may be provided as a powder added to the initial mixture and also by using a carbonizable binder, e. g. phenol-formaldehyde resin.
Patent GB-416186-A (GB)
Title: Improvements in or relating to high resistance alloys primarily for use in thermionic valve and like cathode cores
IPC: C22C19/00
Filed: 1933-09-01
Abstract: A base for oxide coated cathodes comprises an alloy of nickel, cobalt, silicon, and titanium in the production of which the titanium is introduced in the form of nickel-titanium.  The alloys may consist of 95 per cent or more of nickel and cobalt, 1-3 per cent of silicon and up to 1 per cent of titanium in the form of nickel-titanium, with or without up to 10 per cent of molybdenum. The cobalt may be 10-45 per cent of the nickel-cobalt content. The alloy may be made by melting in a silica or zircon crucible in a high frequency furnace, adding the silicon and then the required amount of nickel-titanium. The casting is swaged at about 900-1100 DEG  C., or forged at about 700 DEG  C., and is then annealed in a hydrogen furnace at about 800 DEG  C., after which it is cold-drawn and rolled, and the resulting wire is coated in the usual manner.  According to the Specification as open to inspection under Sect. 91, the titanium may be introduced in the form of ferro-titanium. This subject-matter does not appear in the Specification as accepted.