baber/WOPTO huggingface dataset:
Patent GB-731713-A (GB)
Title: An electric switch or contactor with resiliently supported contacts
Inventor: DELTZ ERNST
IPC: H01H50/64
Filed: 1952-12-03
Abstract: 731,713. Electromagnetic switches. LICENTIA PATENT-VERWALTUNGS-GES. Dec. 3, 1952, No. 30665/52. Class 38 (5). An electric switch or contactor having resiliently supported contacts is characterized in that at least one of each two co-operating contacts is supported by at least a damping member of soft porous rubber or the like. An electromagnetic switch comprises an armature 3 co-operating with an electromagnet 4, the armature 3 carrying a bridge-piece 2 in which is resiliently mounted a moving contact member 1 which engages fixed contacts 5. The resilient mounting comprises a member 7 of soft porous rubber which may be augmented by helical springs 6, 8. The elasticity of the member 7 is such that the tendency for the moving contact 1 to bounce is damped out, thus preventing arcs from occurring between the contacts 1, 5.
Patent GB-1283670-A (GB)
Title: Improvements in and relating to record media transporting apparatus
Inventor: BRIGHT HUGH JAMES THOMAS
IPC: G06K13/073
Filed: 1971-06-30
Abstract: 1283670 Delivery sheets LONDON TRANSPORT EXECUTIVE and H J T BRIGHT 30 June 1971 30707/71 Heading B8R [Also in Division G4] The invention relates to apparatus comprising a number of rollers 10 (only one shown in Fig. 3) spaced around part of the periphery of a rotatable drum 6, an endless belt 3 passing around the rollers and means (not shown) for sensing data on a ticket as the latter is fed in direction D between the belt and the drum to a point E. According to the invention, the ticket is moved from point E by a further endless belt 33, acting in conjunction with rollers 36, 38 and a spring 40. In the preferred embodiment an additional endless belt 32, Fig. 4, side-by-side with belt 33 and similarly additional rollers 35, 37 are provided so that opposite edge regions of the ticket are gripped. If the sensing means detects a ticket that is to be retained, it generates a signal to energize a solenoid 47, Fig. 4, to pivot a flap 39, Fig. 3, and divert the ticket via a guide 43 to a receptacle (not shown). Otherwise, the ticket is fed to a device 41, from which it can be manually removed.
Patent GB-386008-A (GB)
Title: Improvements in conveyors or screening apparatus
IPC: B65G35/00
Filed: 1931-07-14
Abstract: 386,008. Sifting - apparatus; conveyers. WOODALL-DUCKHAM (1920), Ltd. and SYMINGTON, S., 136, Victoria Street, London. July 14, 1931, No. 30737/30. [Class 117.] In screening or conveying apparatus of the type in which a travelling wave is produced in a flexible perforated or imperforate band 1, the means for forming the wave consists of one or more frames 6 rotating in or out of phase. The frames are mounted on shafts 8 rotated by cranks connected by a rod 10 to the actuating crank-shaft 9. The band 1 is secured by pivoted connections at its ends to fixed supports. Intermediate supports 5 and pivoted connections 4a may be provided. A trough section may be given to the band by the provision at its edges of upstanding sections 11, preferably in the form of steel plate's, which may be disposed at graded distances apart to participate in the screening action.
Patent GB-805875-A (GB)
Title: Improvements in and relating to holders for electric lamp bulbs
IPC: H01R33/00
Filed: 1956-10-09
Abstract: 805,875. Lamp-holders. UNITED-CARR FASTENER CORPORATION. Oct. 9, 1956 [Oct. 10, 1955], No. 30791/56. Class 38 (1). A lamp-holder as in Specification 802,300 in which the contact 42 has only a short shank 56 to which the conductor 50 is secured and the washer 40 has a tubular extension 42 surrounding the contact which prevents the spring touching the contact. The spring 36 is tapered having the coil of largest diameter at the base of the insulating housing 18.
Patent GB-1045395-A (GB)
Title: A process for the preparation of polyesterimides
Inventor: MULLER GERHARD
IPC: C09D5/25
Filed: 1965-07-20
Abstract: Polyesterimides which are soluble in organic solvents are prepared by interacting an organic diisocyanate at 50-250 DEG  C. with a compound of formula <FORM:1045395/C3/1> in which R is a saturated or unsaturated radical containing aliphatic or cycloaliphatic carbon atoms linked directly to the ester groups optionally including an aromatic, cycloaliphatic or heterocyclic ring or an ether, ester, sulphide, sulphoxide or sulphone link and chlorine, bromine, iodine, nitro, alkoxy or mercapto substituents.  R groups specified include ethylene. The diisocyanate may be aliphatic, aromatic, cycloaliphatic, alkaromatic and mixed cycloaliphatic / aromatic and may contain alkoxy, azo, nitro, cyano, ester or sulphone groups. Diisocyanates specified include tolylene diisocyanate, diisocyanato - diphenyl ether and diisocyanato-diphenyl-methane. These may be masked by one of a number of specified masking agents.  The reaction may be effected by adding the ester to the diisocyanate or vice versa, 0.9-1.1 moles of the latter being used per mole of the former.  The reaction may be carried out under anhydrous conditions in an organic solvent and under an inert atmosphere, e.g. N2 or argon.  0.1-10% of a Lewis acid or basic catalyst may be present.  Solvents specified include cresol and xylene.  Catalysts specified include tin octoate and titanium butylate.  CO2 is evolved during the reaction. The product may be mixed with polyethylene terephthalate and used as a lacquer for copper wire or to make films.  In examples (1, 3 and 4) the mixture of polyesterimide and polyethylene terephthalate is treated with further catalyst and heated.
Patent GB-1177680-A (GB)
Title: Purification of d 1-Malic Acid.
Inventor: YEOMANS BERTRAM
IPC: C07C51/48
Filed: 1967-07-05
Abstract: 1,177,680. Purification of malic acid. BP CHEMICALS (U.K.) Ltd. 12 June, 1968 [5 July, 1967], No. 30863/67. Heading C2C. dl-Malic acid contaminated with maleic and fumaric acids is purified by recrystallizing dlmalic acid from a solvent, which is an ester or ketone wholly or partially immiscible with water. The solvent is subsequently washed with water to remove fumaric and maleic acids before recrystallizing more dl-malic acid, contaminated with maleic and fumaric acids, therefrom.
Patent GB-504640-A (GB)
Title: Improvements in or relating to boiling plates for electric cookers
IPC: F24C15/10
Filed: 1937-11-10
Abstract: 504,640. Electric hot -plates. BRITISH THOMSON-HOUSTON CO., Ltd., and PLASTED, R. E. Nov. 10, 1937, No. 30880. [Class 39 (iii)] An electric hot-plate is supported on an undercarriage made in two box-like channelshaped parts 3, 9. The part 9 is fixed, and the member 3 is pivotally mounted about the centre 2 of the hot-plate 1 and carries the leads of the heating elements 7 to the electric terminals 5.
Patent GB-520638-A (GB)
Title: Improvements relating to viscosity-controlled oil valves
IPC: F16K17/00
Filed: 1938-10-26
Abstract: 520,638. Valves. PEARSON, D. A., SERCK RADIATORS, Ltd., and GARNER, E. Oct. 26, 1938, No. 30928. [Class 135] A valve device for automatically controlling the flow of oil through either of a pair of alternative paths in response to variations in the viscosity of the oil and particularly adapted for controlling the flow through an oil cooler and its associated by-pass comprises a pair of valves held against inlet pressure by loading springs the more lightly loaded valve being provided with a dashpot device connected to the inlet and one of the outlet conduits. In the form shown in the Figure the two valves g, i are arranged in opposite sides of a chamber l connected to the oil inlet b while the outlet c is connected to the cooler and the outlet d to the by-pass. The valve i loaded by a relatively heavy spring j is formed integrally with a tubular spindle n guided at each end by sockets formed on removable covers. The second valve loaded by a light spring h is slidably mounted on the spindle n and is formed integrally with a piston k working in a cylinder m. The cylinder m is connected on the one hand with the oil inlet by way of apertured plate w pipe p and ported block q within the spindle n and ports s in the spindle protected by a strainer t and on the other hand with the outlet side of the valve i by way of ports 2 in the spindle, passages 3 in the block q needle valve x, y and ports z in the spindle. When the oil has a high viscosity the oil is more or less trapped in the cylinder m and prevents the valve g being opened by the inlet pressure so that delivery takes place through the valve i. As the oil warms up and becomes less viscous it flows away from the cylinder through the needle valve x, y permitting the valve g to open and the valve i to close. In a modification the two valves are independently arranged and the valve g has a hollow spindle fitted with a restriction through which oil is fed to the cylinder, exhaust taking place through the clearance between the piston and cylinder.
Patent GB-291074-A (GB)
Title: Control valve mechanism
IPC: B23B47/22
Filed: 1927-11-18
Abstract: 291,074. National Automatic Tool Co., (Assignees of Galloway, R. M.). May 27, 1927, [Convention date]. Hydraulic transmission of power. - A control valve particularly adapted for controlling the fluid supply to a hydraulic cylinder actuating the drill head of a drilling machine is fitted with a movable stop actuated by adjustable tappets on the drill head so that after the valve has been actuated by hand, the apparatus works through a complete cycle, being traversed rapidly into contact with the work, then slowly through the work and afterwards retracted quickly to its initial position. In the form shown in the Figures the valve comprises a tubular member 40 with a recessed part 40<x> and works in a ported liner 32, so as to connect the pressure supply pipe L either with the pipe 1 for advancing the head or with the pipe 2 for retracting the head, the pipe not connected to pressure being connected to the exhaust pipe 8 through the hollow valve member. The valve is initially moved against the action of a spring 48 to admit pressure to the pipe 1 by means of a hand lever 21 having a projection 23 engaging between collars 24 on a rod 42e connected to the valve spindle 42, and is held in this position by a face 54 on a sliding stop 47 pressed upwards by a spring 50. At the end of a predetermined traverse a tappet 16 on the head A depresses the stop which allows the valve to move to right and partly close the ports 37 to retract the fluid supply and give a slow traverse. The valve is held in this position by the end 42<x> of the valve spindle engaging the end 52<x> of a sleeve 52 adjustably mounted in the stop member 47. A chamber 56 closed by a movable cover 57 is formed in the casing to give access to the end of the member 52 and its locknut 53. At the end of the forward traverse, a tappet 17 further depresses the stop and allows the end of the valve rod to pass into the tubular member until a collar 55 engages the end 52<x>. This connects the pipe 2 instead of the pipe 1 to the pressure line and commences the backward traverse. To relieve the rod 42 from side strain in this position, a cone 71 on the valve spindle acts through a sliding member 70 and lever 66 to take the strain of the spring 50. In a modification the pipe 1 has two connections with the control valve, one of which is adjustably throttled, and the stop member has no adjustable parts.
Patent GB-208335-A (GB)
Title: An improved braking motion for looms for weaving
IPC: D03D49/08
Filed: 1922-11-14
Abstract: 208,335. Aspin, J., Clithero, J. T., Leyland, E., and Moorbrook Mill Co., Ltd. Nov. 14, 1922. Letting-off warps.-Relates to let-off motions of the kind in which the ropes or chains at each end of the beam are attached to the ends of the bell-crank levers, the other ends of the bell-crank levers being connected together through one or more springs to apply the necessary tension to the ends of the warp beam. The ends of the bell-crank levers A, A' extend vertically above the beam C and are connected by a chain F, or rod, and one or more tensioning-springs G. The springs are connected by a hook f to an outwardly extending lever E which is pivoted to the lever A and normally held in the position shown by a projection e. To release the tension, the lever E is moved upwardly. When a rod is used instead of a chain F, it is passed through a hole in the lever A<1> and carries a hand wheel mounted on its screw threaded projecting end. The levers A, A<1> are made in three parts a, a', a<2>, Fig. 4, a projection a<3> on one part a<1> engaging in a hole a<4> in the part a<2>, the vertical part a being secured by a bolt between the other parts. Apertures a<7> are formed in the parts a<1>, a<2>, to receive pins or screws carrying hooks d connected to the ends of the chains D passing round the ends of the warp beam. The levers A, A<1> are mounted on a pin b' on an adjustable bracket secured to the loom frame.
Patent GB-955266-A (GB)
Title: Method of producing elongated structures of isotactic polystyrene
IPC: D01F6/20
Filed: 1960-09-09
Abstract: 955,266. Polystyrene filamentary materials. UNION CARBIDE CORPORATION. Sept. 9, 1960 [Oct. 14, 1959], No. 31056/60. Addition to 940,621. Heading B5B. Elongated structures (e.g. fibres, monofilaments and ribbons) of isotactic polystyrene are longitudinally stretched firstly at 115-130 C. to effect a stretch of 300-650%, and secondly at 125-150 C. to effect a total longitudinal stretch of at least 750%. Preferably, first stage stretching is effected at 125 C. and second stage stretching at 135 C. Conventional heating and stretching means may be used. As shown, a 50-filament isotactic polystrene row is fed from storage drums 4 over guides 6, 8 to a constant-speed feed roll assembly 10, and thence through a heating zone 12 to a godet roll assembly 14, the speed of which in relation to that of 10 is sufficient to impart the required first stage stretch. The tow then passes through a second heating zone 16 to godet roll assembly 18, the speed of which relative to 14 is such that the required total stretch is obtained, and is wound up on spool assembly 20. Monofilaments may alternatively be extruded, cooled to 115-130 C. and fed directly into suitable stretching apparatus. Filamentary material so treated has enhanced tensile strength, reduced elongation and thermal shrinkage and is insoluble in tetrachlorethane.
Patent GB-1447803-A (GB)
Title: High voltage protection circuitry more especially for solid- state rectifier systems
IPC: H01T4/16
Filed: 1973-08-31
Abstract: 1447803 Over-voltage protective arrangements RADIATION DYNAMICS Inc 31 Aug 1973 [21 May 1973] 31073/74 Divided out of 1447802 Heading H2H The subject-matter of this Specification is identical with that described in Specification 1,447,802 but the claims are concerned with a protective arrangement in a series-connected chain of components, such as rectifiers, having a series-connected chain of spark gaps each spark gap being connected across one component or group of components to be protected, one spark gap being connected across an inductor and arranged to break down at a lower voltage than the other spark gaps all the spark gaps being in optical communication with said one spark gap.
Patent GB-341417-A (GB)
Title: Improvements in or relating to automatic machines for operating upon boots or shoes or parts therefor
IPC: A43D95/22
Filed: 1929-10-14
Abstract: 341,417. Boot-making machines. BRITISH UNITED SHOE MACHINERY CO., Ltd. and KEALL, F. B., Union Works, Belgrave Road, Leicester. Oct. 14, 1929, No. 31084. [Class 17 (i).] Edge-setting.-In an edge-setting machine of the kind described in Specifications 22503/09 and 309,054, [both in Class 17 (i), Boots and shoes, Apparatus for making &c.], mechanism is provided operated by the tool for causing this to tip about a virtual axis substantially on the operative face of the tool or on the same side of that face as the work. The tool 1 is mounted on knife-edges 2 projecting from a holder 3 supported by a T-piece 5 having a shank 4 capable of rotation and vertical sliding in a sleeve 6 supported as described in the prior Specifications. The shank 4 is supported by a spring 8 supported by an adjustable rod 16 engaging a member carried by the sleeve 6. The effective strength of the spring is adjustable, a curved bar 12 connecting one end of the spring to a link 15 the other end of which is pivoted on a pin carrying the other end of the spring. Notches 13, 20 in the bar co-operate with edges of square pins 14, 19 on the link 15 and rod 16 respectively. To the sleeve member 6 is pivoted at 21 a lever 22 supported by a spring 29, the lever carrying, adjacent to the pivots 21 a block 23 engaging a recess in a collar fixed to the shank 4. The outer end of the lever is recessed to carry upper and lower balls 31, 32. engaging flats at the end of a stud 33 and a dumbbell 35 respectively, a third ball 36 being interposed between the lower end of the dumbbell and the lower end of a yoke 34, the upper end of which carries the stud 33. This arrangement provides an antifriction coupling between the lever 22 and a rod 24 to which rod is fixed a slide 25 formed with a lug 26 engaging a recess in the iron 1. As the iron tips, it raises or lowers the rod 24, thereby swinging the lever 22 to raise or lower the T-piece 5, and, therefore, the tool holder 3 and knife-edges 2. The iron is thus tipped about a virtual axis on or just in front of its operative face, so that it can readily tip, in operation, in either direction.
Patent GB-520263-A (GB)
Title: Improvements in the manufacture of polyamides
IPC: C08G69/30
Filed: 1938-10-28
Abstract: 520,263. Polyamides. DU PONT DE NEMOURS & CO., E. I. Oct. 28, 1938, No. 31200. Convention date, Nov. 9, 1937. [Class 2 (iii)] Refers to diamine-dibasic acid polyamides, as described in Specification 461,237, and consists in converting the half-made polyamide to a superpolyamide by heating the former in the solid state and preferably in finely-divided condition to a polymerizing temperature which is below (preferably 2-20‹C.) the melting-point, as determined by the fusion method in the absence of oxygen. In an example hexamethylene diammonium adipate, with a little adipic acid and hexamethylene diammonium acetate and water is heated to 225‹C. in an autoclave and the half-made polymer so prepared is then heated in the solid state to 259‹C. The invention may be applied to mixtures of polyamides, interpolymers, or polyamide compositions containing modifying agents, e.g., plasticizers, resins, pigments, dyestuffs, &c. Specifications 474,999, 495,790 and 506,125 also are referred to.
Patent GB-239094-A (GB)
Title: Improvements in rotary earth boring apparatus
IPC: E21B3/04
Filed: 1924-12-31
Abstract: 239,094. Greve, E. E. Dec. 31, 1924. Screws, screwing-up and unscrewing. -Rotary bore-hole apparatus adapted for screwing up &c. sections of pipe comprises an apertured base 6 carrying roller bearings 9 on which is a supporting ring 19 which may be locked to the base when desired by engagement of a pin A with one of a number of recesses 24 ; a drive ring 11. projects through the base, is supported on shims 23, is non-rigidly connected to the supporting ring 10 by a key 12 and has an upper flange 13; between the flange 13 and the supporting ring 10, a gear ring 19 is rotatably arranged. slip rings 17, 18 being provided. The gear ring 10 may be locked to the drive ring 11 either by a pin 25a, Fig. 2, slidable into a notch in the flange 13, or by a plug 25b, Fig. 3, fitting registering recesses. An engaging rib 10a and recess 26 prevent mud &c. passing between the gear and supporting rings, and a depending skirt 27 protects the bearings 9. The tapered opening of the drive ring receives a spider 35 which has a key 35a engaging a keyway 34. The tapered opening of the spider receives slips or a drive bushing 37, the latter having a key connection 37a and being held by a tangentially movable key 38. Recesses 40, 41 in the gear and drive rings receive tong posts when pipes &c. are being screwed together. A lubricant reservoir 28 is provided in the drive ring, flow of oil to the slip ring 18 being assisted by centrifugal force; vertical felt strips 32 on each side of the slip ring 18 assist lubrication. From the slip ring 18, oil passes to the slip ring 17 and thence through passage, 33 to the roller bearings 9, and then overflows the lower race 8 to lubricate the drive ring 11. Specification 189,907, [Class 85, Mining &c.], is referred to.
Patent GB-1516125-A (GB)
Title: Network which exhibits an output independent of its input supply
IPC: H02J1/04
Filed: 1975-07-28
Abstract: 1516125 Transistor stabilizing networks NATIONAL SEMICONDUCTOR CORP 28 July 1975 [6 Nov 1974] 31469/75 Heading H3T An electric circuit comprises a plurality of pairs of transistors with their base-emitter junctions connected serially in a loop the algebraic sum of the base emitter voltages being developed across one or more non-zero resistances in the loop. The transistors of each pair carry the same current and the base emitter voltages of the transistors of each pair opposing one another around the loop. If terminals 16 and 24 in Fig. 1 are connected together a loop 16-28-12-30-18-10-26-20-32-24-16 is formed through the base-emitter junctions of the transistors. The algebraic sum of the base-emitter voltages, which is fixed by choice of the emitter areas, appear across the resistors. Since the series connected transistors 10, 12 have their base-emitter junctions connected in opposition round the loop, as do transistors 18, 20, changes in the collector currents do not affect the algebraic sum of the baseemitter voltages. A further transistor may be provided with its emitter collector path in series with transistor 10 and its base connected terminal 22. To provide a regulated current, resistors 26, 28, 30 are made zero and a voltage is applied through a resistor to terminal 14, the regulated current appearing at terminal 22. A regulated voltage may be obtained across terminals 22, 24 by making resistors 26, 30 and 32 zero and connecting terminals 14, 16 through a resistor to a current source.