baber/WOPTO huggingface dataset:
Patent GB-771148-A (GB)
Title: Photopolymerizable compositions and the polymerization thereof
IPC: C08F2/46
Filed: 1955-06-01
Abstract: Ethylenically unsaturated compounds are photopolymerized in the presence of, as a photoinitiator, an O-alkyl xanthate ester in which the organic radical attached to the thiol sulphur atom of the xanthate structure contains a double bond on a carbon atom in the beta position to the thiol sulphur atom, the double bond being joined to a carbon or oxygen atom.  Preferred xanthate esters are those having the general formula <FORM:0771148/IV(a)/1> wherein R is an alkyl radical, R1 is an organic radical whose free valence bond is on a carbon atom which is in turn connected by a double bond to an oxygen atom or to another carbon atom, x and z are each 1 or 2, y is 0, 1 or 2 and the sum of x+y+z is 4, e.g. carbethoxy bis-(ethyl xanthate) and the corresponding propyl and butyl derivatives; other compounds of this type are listed. Ethylenically unsaturated compounds specified are acrylonitrile, methacrylonitrile, ethyl acrylate, methyl methacrylate, isobutyl methacrylate, methyl chloracrylate, methacrylamide, vinyl propionate, vinyl and vinylidene chlorides, divinyl formal, vinyl ethers, methyl vinyl ketone, styrene, isoprene, chloroprene and poly (propylene glycol maleate/phthalate), and mixtures of two or more of these compounds. The polymerization may be carried out by bulk, solution, emulsion or granular methods, if desired in the presence of inhibitors which may be present in the polymerizable compound, e.g. hydroquinone, tert.-butyl catechol, pyrogallol, beta-naphthol, naphthylamines and copper resinates.  The Specification describes also the photopolymerization of a mixture of methyl methacrylate, isobutyl methacrylate, monomeric polyethylene glycol dimethacrylate and polymeric methyl methacrylate in the presence of benzoin and 1:11-azodicyclohexanecarbonitrile.  Specifications 567,778, [Group IV], and 741,294, [Group XX], are referred to.
Patent GB-554923-A (GB)
Title: Improvements in and relating to resinous moulding compositions
IPC: C08K5/43
Filed: 1941-12-09
Abstract: 554,923. Resinous condensation products. BRITISH THOMSON-HOUSTON CO., Ltd. Dec. 9, 1941, No. 15848. Convention date, Dec. 10, 1940. [Class 2 (iii)] A heat-hardenable moulding composition comprises an aminoplast, a filler and an aryl compound substituted in the nucleus by a sulphonamide radical and a group -NHCONH 2 . The aminoplast may be an aminotriazine-, aminodiazine-, urea-, protein-, aniline-, benzene disulphonamide-, sulphanilamide- or diamide-aldehyde resin. The aryl compound may be p-ureido - phenyl - sulphonamide, p- - ureido - phenyl sulphonphenylamide, p - ureido - phenyl - sulphonpropylamide, p - ureido - phenyl - sulphon - dibutylamide or p - ureido - phenyl - sulphonbenzylamide. A suitable filler is α - cellulose in flock form. A curing accelerator may be added. The aryl compound may be incorporated in the resin with the reactants during or after formation of the partial condensation product or during the preparation of the moulding composition. Specifications 9244/41, as open to inspection under Sect. 91. 540,198, 554,196 and 554,339 are referred to.
Patent GB-707840-A (GB)
Title: Improvements in containers for fragile articles
IPC: B65D59/04
Filed: 1952-06-24
Abstract: 707,840. Boxes. MATCHETT. A. J. June 24, 1952 [Aug. 17, 1951], No. 15870/52. Class 18 A box for a radio valve or the like comprises a tubular member having beaded or flanged ends, and detachable elements engaging the ends having means for supporting the valve. The elements may consist of rectangular sheets 16, 17, having portions 18, 19. cut out from their shorter sides, forming "legs" which are bent to engage the beads. The central portion of each member has apertures to receive the pins &c. of the valve. Where an article has an end without a locating projection, the member adjacent that end may have a flanged aperture receiving the end, or may have two parallel slits 37, 38 (Fig. 15), whereby a central section may be bowed outwards round the end of the article and the two side sections bowed downwards on either side of it. The box may be formed entirely of transparent material and may have its ends sealed by discs. It may be of polygonal section.
Patent GB-121117-A (GB)
Title: Improvements in Processes and Apparatus for Cooling Viscous Liquids.
Inventor: RAFN ROBERT
IPC: A23C1/12
Filed: 1918-09-30
Abstract: 121,117. Rafn, R. Nov. 30, 1917, [Convention date]. Cooling liquids.-Viscous liquids, particularly sweetened condensed milk or liquids containing salts in solution, are cooled continuously without the liability of crystallization by passing them through an inclined tube surrounded by a cooling-jacket, and pressing or rolling the liquid against the cooling surfaces during the operation. As shown, the liquid to be cooled is fed into the upper end of an inclined tube 3 of copper, &c., revolving within an outer jacket 1 through which a cooling-liquid flows upwards. A hollow internally-cooled shaft 4 passes through the tube 3 and is mounted in ball bearings 5, so as to rest upon the tube 3 and produce a rolling action on the liquid. Any liquid adhering to the shaft at the lower end is removed by a knife, &c.
Patent GB-531472-A (GB)
Title: Compressor shut-off valve
IPC: F04B49/22
Filed: 1939-05-30
Abstract: 531,472. Fluid-pressure servomotor-control systems. WAGNER ELECTRIC CORPORATION. May 30, 1939, No. 15941. Convention date, July 5, 1938. [Class 135] In a valve mechanism for maintaining and limiting the pressure in a receiver 8 charged by a compressor 1 and from which a pressure line 12 extends to a pressure consumer such as a fluid motor 13, a valve member 23 in the inlet conduit 18 of the compressor 1 is biassed by a spring 34 to open position and is moved automatically into closed position when the pressure in the receiver 8 reaches a predetermined value. A passage 27 from the valve chamber 21 is controlled by a valve element 29 and means controlled by fluid pressure from the consumer 13 is arranged to open the valve element 29 to relieve quickly the pressure acting on the valve member 23. As shown, the valve member 23 is a hollow piston loosely sliding in a fitting 25 and co-operating with a seal 22. The fitting 25 is connected by a conduit 26 to an oil dome 7 on the rotary compressor 1. Fluted valve elements 29, 32 are held by a spring 33 on seats 28, 31 in the valve member 23 and the fitting 25. The spring 34 is of greater strength than spring 33 and bears against a fixed shoulder 35. When the pressure in the dome 7 and receiver 8 is sufficient, the valve element 32 admits air into the chamber 36 and the pressure therein moves the valve member 23 on to its seal 22. On a sufficient fall of pressure in the dome 7, the valve element 32 is closed by spring 33, the pressure in chamber 36 leaks around the valve member 23 and the valve is opened by spring 34. If it is desired to recharge the receiver every time fluid is drawn therefrom, a piston 37 carrying a rod 38 for opening the valve member 23 is arranged to be actuated by fluid-pressure in a conduit 40 connected to the fluid-pressure system at a point between a control valve 14 and the fluid motor 13.
Patent GB-697558-A (GB)
Title: Improvements in or relating to electric tap-changing switches
Inventor: FROWEIN EGBERTUS ADRIANUS
IPC: H01H3/22
Filed: 1951-07-05
Abstract: 697,558. Actuation of switches. SMIT & CO'S. TRANSFORMATORENFABRIEK NV., W. July 5, 1951, No. 15966/51. Drawings to Specification. Class 38 (v) In order to regulate the speed of operation of the parts of a tap-changing switch when moved on release of a spring pre-stressed by a crank, the crankshaft has a flywheel mounted thereon. The spring drives the contacts through a maltese cross mechanism and the flywheel enables the engagement of the cross by a driving catch on the crankshaft to be delayed without increasing the stress on the parts. The disengagement of the catch from the cross is similarly delayed.
Patent GB-476687-A (GB)
Title: Improvements in or relating to electric insulators
IPC: H01B17/20
Filed: 1936-06-09
Abstract: 476,687. Insulators. STEATITE & PORCELAIN PRODUCTS, Ltd., and LOWN, C. R. June 9, 1936, No. 16164. [Class 36] [Also in Group XXV] An insulator comprises a pin 4 and an insulator body 1 the pin having a lead or other soft metal head 5 which fits in a cavity in the insulator body. The head is formed with a screw-threaded portion and a conical portion for engagement with correspondingly screwthreaded and coned portions 2, 3 of the cavity. The conical portion of the head may be formed with projections or serrations 6 which are deformed on screwing the pin into insulator body to establish good contact between the conical surfaces. The pitch of the threads on the screw-threaded surfaces is preferably from three to four turns per inch and the profile of the thread on the pin-head may differ from that of the thread in the insulator body.
Patent GB-353157-A (GB)
Title: Improvements in or connected with pedestals applicable to floor outlets for electric conductors
IPC: H02G3/18
Filed: 1930-05-26
Abstract: 353,157. Conduits for cables. TAYLOR, G. E., 7, Suffolk Lane, London. May 26, 1930, No. 16171. [Classes 36 and 38 (i).] A casing for protecting an electric conductor where it passes through a floor consists of an upright portion with a turned-over end from which the conductor issues through a downwardlv directed or lateral opening. The Figure shows an inner casing a, slotted to give access to the conductor and screwed into a base d connected to a conduit h under the floor. A sleeve c surrounds the casing a and is turned over at the end where there is a downwardlydirected opening j<1>. In a modification the sleeve c is replaced by a T-piece with coupling-sockets in the arms.
Patent GB-231053-A (GB)
Title: Improvements in golf clubs
IPC: A63B53/04
Filed: 1924-07-05
Abstract: 231,053. Read, L. G. July 5, 1924. Golf clubs.-The head of a golf club is weighted by an elongated solid weight extending inwardly from the sole and arranged with its longitudinal axis in the central planeof the shaft and substantially coincident with the axis of the shaft. The weight 15 is applied by drilling the head and pouring in molten lead. The bore may be enlarged, as at 18, to give added weight directly behind the striking point of the face. The striking face has an area substantially equal to the longitudinal section of the head and is of substantially equal height at the heel and toe.
Patent GB-1536524-A (GB)
Title: Alkali molybdates from impure molybdenum oxides
IPC: C01G39/02
Filed: 1977-04-19
Abstract: 1536524 Alkali metal and ammonium molybdates AMAX Inc 19 April 1977 [19 May 1976] 16244/77 Heading C1A Alkali metal and ammonium molybdates are obtained from an impure mloybdenum oxide feed material by mixing the feed material with an aqueous acid solution to form a slurry containing from 5 to 40% solids, the acid solution containing sulphuric acid, nitric acid, hydrochloric acid or a mixture thereof in an amount in stoichiometric excess of that required to react with the contaminating metals and metal compounds present in the feed material, autoclaving the slurry at a temperature of from 150 C. to 350 C. in the presence of a free oxygen partial pressure of at least 100 p.s.i. for a period of time sufficient to convert any molybdenum sub-oxides present in the oxidized feed material to molybdenum trioxide and to convert contaminating metals and metal compounds present to aqueous acid solution soluble compounds, subjecting the autoclaved slurry to a separation treatment to recover the solids from the acid solution, leaching the recovered solids with an aqueous alkali metal or ammonium hydroxide solution to convert the molybdenum trioxide constituents therein to soluble alkali metal or ammonium molybdate compounds, separating the aqueous alkali metal or ammonium hydroxide solution containing the solubilized molybdate compounds from the remaining insoluble residue, and recovering the molybdate compounds from the aqueous hydroxide solution as high purity alkali metal or ammonium molybdate product.
Patent GB-253723-A (GB)
Title: Indicator blind mechanism for vehicles
IPC: B60J3/02
Filed: 1925-06-25
Abstract: 253,723. Lorkin, W. L., and Daglish, J. June 25, 1925. Reel and non-endless web apparatus.-In destination indicators on vehicles, comprising a band wound on and off two rollers which are actuated by a shaft carrying pinion wheels, the winding-on roller being determined by the direction in which the shaft is turned, the shaft D is longitudinally movable in its bearings E and carries two pins G each engageable with a ratchet C<2> on the loose pinions C. Rotation of the shaft bv the handle L causes one of the pins G to slide over its ratchet teeth and move the shaft so that the other pin G engages its ratchet. Spring - pressed leather brakes K are provided to tension the band. Specification 2885/10 is referred to.
Patent GB-185855-A (GB)
Title: Improvements in looms for producing cross-woven fabrics
IPC: D03D41/00
Filed: 1921-06-15
Abstract: 185,855. Longdon & Co., Ltd., F., and Wilmore, A. S. June 15, 1921. Leno and like motions; healds. - In weaving a crosswoven fabric with the warp threads in pairs or groups, the warps are passed through eyes n in thread-guides e, e', g, h cast or carried in blocks b<1>, c<1>, d<1> on three horizontal bars b, c ,d. The top bar b carries a double row of guides e, e<1> and is moved vertically in a guide f, by dbbby mechanism &c., whilst each bottom bar c, d carries a single row of thread-guides. The bars c, d are traversed laterally to cross the warps by means of a lever j having an adjustable stud m engaging a cam-groove in a drum l. The lever j is pivoted at p and may move the bars c, d in opposite directions by means of pins q, r; or the bars c, d may be bolted together and be moved in the same direction.
Patent GB-598604-A (GB)
Title: Improvements in locking devices for hydraulic jacks and the like
IPC: F15B15/26
Filed: 1945-06-27
Abstract: 598,604. Locking rods. OLAER PATENT CO., and COMPAGNIE GENERALE POUR L'EQUIPEMENT AERONAUTIQUE. June 27, 1945, No. 16448. Convention date, Dec. 18, 1942. [Class 80(iii)] [Also in Groups XXIX and XXX] In a locking device for an hydraulic jack one end of a lever 5 pivoted at 7 to the cylinder of the jack about an axis perpendicular to the direction of sliding of the piston rod 2 has a locking surface adapted to co-operate with a shoulder of the piston rod for holding it in locking position in which the locking surface is perpendicular to the longitudinal axis of the piston rod, the circular arc described by the end of the lever during its locking and unlocking movement being tangential to the cylindrical surface of the piston rod. The lever is maintained in locking position in which the lever is perpendicular to the longitudinal axis of the piston rod by a toggle joint 4-6 interposed between the cylinder of the jack and the lever, and immobilised in, or slightly beyond, dead centre position by means of a spring 12. An hydraulically actuated piston 15 is provided for bringing the toggle joint beyond the position in which the lever is released.
Patent GB-1035262-A (GB)
Title: Preservation of diene rubbers
IPC: C08K5/18
Filed: 1964-04-21
Abstract: Natural and synthetic diene rubbers are preserved from oxidative degradation by the incorporation therein of an N-alkyl-N1-phenyl-p-phenylenediamine, wherein the alkyl group is a secondary alkyl group containing 6 or 7 carbon atoms.
Patent GB-487546-A (GB)
Title: Improvements in ophthalmic lenses
IPC: G02C7/02
Filed: 1937-06-15
Abstract: 487,546. Spectacle lenses. TENNANT, W. J. (American Optical Co.) June 15, 1937, No. 16655. [Class 97 (i)] The two parts 1, 3 of an achromatic lens of strong positive power, particularly for use with an aphakic eye, are secured together at complemental surfaces 2 intersecting a continuous optical surface 4 and have substantially the same indices of refraction but different dispersive factors. The part 1 may be a flint glass (index of refraction 1À61 and reciprocal relative dispersion 36) with a countersink surface 2 having a refracting power of 19À5 cliopters and a rear surface 5 having a refracting power of minus 3 diopters. The smaller part 3 may be a barium crown glass (index of refraction 1À61 and reciprocal relative dispersion 50) and the common surface 4 may have a refracting power of 14À07 diopters. The resultant power of the lens is plus 14 diopters and the resultant chromatic aberration less than 1/10 diopter. The compound lens may have a toric surface preferably on the ocular side.
Patent GB-514807-A (GB)
Title: Improvements in apparatus for receiving television and like signals
IPC: H04N5/10
Filed: 1938-06-03
Abstract: 514,807. Television. GENERAL ELECTRIC CO., Ltd., CHERRY, E. C., EDWARDS, G. W., and O'KANE, B. J., June 3, 1938, No. 16707. [Class 40 (iii)] A series-resonant circuit 15, 16, 17 tuned to the line frequency is shunted across the output of the frequency-selective means 7 for selecting the framing frequency. A component of twice the line frequency is introduced in the output by a condenser 18 connected to a tapping 19 on the anode resistance 6 of the valve 4 for separating the synchronising signals from the image signals. The elements 15, 16, 17 are adjusted so that they also act as a parallel tuned circuit at twice the line frequency.
Patent GB-1382920-A (GB)
Title: Clinometers
IPC: E02D1/02
Filed: 1972-04-12
Abstract: 1382920 Clinometers STICHTING WATERBOUWKUNDIG LABORATORIUM 12 April 1972 [29 April 1971] 16785/72 Heading G1N A clinometer comprises a yoke-shaped support 7, Fig. 2 carrying a cylindrical magnet in a housing 14, pivotted on a horizontal axis 2, with a weight 17 attached to ensure that the diametrically opposed poles of the magnet are always located in a horizontal plane. The upper part of the yoke houses a pin 8 in an adjustable sleeve 9, with a Hall plate 4 at the lower extremity. The yoke is located coaxially in a tube whose inclination to the vertical moves the Hall plate 4 out of the neutral magnetic axis to produce an output  voltage whose amplitude and polarity represent the magnitude and direction of the inclination of the yoke and surrounding tube with respect to the vertical in the plane perpendicular to the axis 2.
Patent GB-1081830-A (GB)
Title: Stabilising circuit for an electric power supply
IPC: G05F1/455
Filed: 1966-04-18
Abstract: 1,081,830. Automatic control of current and voltage. AMP Inc. April 18, 1966 [April 22, 1965], No. 16797/66. Heading G3R. In a stabilized power supply, the voltage at an output terminal D is maintained constant by automatically controlling the duty cycle of an electronic switch 11 connected between the terminal D and an A. C. input terminal A. The switch 11 includes thyristors 20, 21 which are connected in anti-parallel and which receive firing pulses from a circuit 16 responsive to a control signal derived from a circuit 15 which includes a sawtooth generator constituted by unijunction transistor 76, capacitor 49 and resistors 50, 75. A voltage representative of the output voltage is derived from rectifier 13 and is compared in circuit 14 with a reference voltage derived from Zener diode 33, and the resultant is applied to the emitter of transistor 40 the base of which is coupled to the sawtooth generator and the collector of which is connected over transistor 47 to the circuit 16. When the output voltage is too high, the voltage at the emitter of transistor 40 when compared with the sawtooth voltage at the base will lead to a late conduction of the transistor; thus a relatively late pulse is fed to circuit 16, and the thyristors 20, 21 are fired at a later point in the corresponding half cycles of applied voltage. The converse occurs if the output voltage is too low, and the firing angle of thyristors is thus automatically controlled in a sense to keep the output voltage constant. The circuit 15 is also associated with a current sensing circuit 12 which supersedes the voltage control circuit to keep the load current constant when the latter reaches a desired maximum value determined by the setting of an adjustable resistor 24. A three phase system is described with reference to Fig. 1 (not shown).
Patent GB-248239-A (GB)
Title: Improvements in or relating to locomotive superheaters
IPC: F22G7/06
Filed: 1925-06-30
Abstract: 248,239. Superheater Co., (Assignees of Brown, R. M.). April 21, 1925, [Convention date]. Addition to 218,985. Smoke - tube superheaters; steam valves, arrangements of. -In a. locomotive superheater of the kind described in the parent Specification, steamactuated balancing means are connected with each valve partially to balance the steam pressure on it when closed, and a valved conduit supplies steam to the balancing means. The valves 13 are seated on bushings 14<a> in a horizontal partition 15 dividing the superheated steam chamber. A second partition 18 which divides off a lower partition 19 of the space within the chamber has a number of cylindrical openings 20 which are slightly smaller in area than the bushings 14a and in which pistons 13<c> of the valves reciprocate. A rocking shaft 22 operated from the cab carries a number of fingers 21, each extending into a slot in each valve stem, the slots being of un- .equal length so that the valves may open by different amounts. An auxiliary valve 28, opened by the first movement of the shaft 22, is provided at one end of the chamber, and the opening it controls leads into a passage divided off by partitions 29, 30, 31, and opening into the space 19. Steam is thus admitted to this space, whereby all the valves become balanced. In a modification, the fingers on the operating shaft engage projections on the lower end of the valve stems and either the projections are of varying length or the angular setting of the fingers on the shaft is varied. Guides for upper extensions of the valves are provided.
Patent GB-420175-A (GB)
Title: Improvements in or relating to tea trays, tea wagons, and the like
IPC: A47B31/00
Filed: 1933-06-13
Abstract: 420,175. Tea trays or wagons. SMITH, A. S. W., Fulwood Vicarage, Watling Street Road, Fulwood, Preston. June 13, 1933, No. 16894. [Classes 52 (v) and 128] A tea tray or wagon is provided with a pair of handles movably attached thereto, and having means to prevent movement of the tray relative to the handles when they are brought into an operative position above the tray. The handles may then be gripped and the tray carried by one hand. A two-tier wagon having removable platforms 4, is provided with blocks 6 mounted on the end walls 5 of the upper tray. Two pairs of L-shaped levers 7 are attached to the blocks 6 by symmetrically spaced pivots 8, and are connected in pairs to cross bars 13. The lower limb of each lever is provided at the end with a wedge-shaped projection or an angle bracket which engages the lower side of the block 6, when the handle is erected. The levers may, by the positioning of the wedgeshaped members, be prevented from abutting one another to improve the grip on the handle members 13. In alternative constructions of the levers and coacting stops : (1) the lower limb of each lever engages at its end a pin projecting from the tray ; (2) the tray bottom is projected beyond the upright side members, forming a ledge which engages the flat bottoms of the levers, and in addition projections mounted on the ledge engage corresponding notches in the levers ; (3) the levers engage a pin projecting between them and mounted on the tray ; (4) one lever is provided with a projection which engages a corresponding recess in the adjacently mounted lever. The levers may be mounted on a common pivot, the overlapping parts being recessed to reduce the combined thickness. The stops, pins &c. may be provided on one or both sides of the tray or wagon, or a single pair of levers mounted at one side and provided with stub handles instead of the crossbar. The trays and parts thereof such as levers, and stops may be made of wood or metal, and the tray bottom may be of glass.