baber/WOPTO huggingface dataset:
Patent GB-378104-A (GB)
Title: Improvements in electrical signalling apparatus
IPC: G01P13/04
Filed: 1931-05-11
Abstract: 378,104. Railway signalling. GENERAL ELECTRIC CO., Ltd. and WALKER, R. C., Magnet House, Kingsway, London. May 11, 1931, No. 13888. [Class 105.] In a system in which the movement of a train in one direction operates signal apparatus, the apparatus not being affected when the train moves in the reverse direction, two contacts are closed in succession and remain closed together. The contacts may be replaced by the anode circuits of thermionic valves controlled by beams of light. When contact 11 is operated relav 6 closes contacts 4 and if contact 10 is then operated a circuit is completed for relays 8 and 3 in parallel. Only relay 8, which is low resistance, is operated in this circuit and the circuit for the signal or counter 12 is completed at 7. If contact 10 is operated first, relay 3 energizes and opens the circuit of relay 8 at contact 1 so that this relay is not energized if contact 11 is subsequently operated. A resistance 13 is inserted in the circuit of relay 3.
Patent GB-681003-A (GB)
Title: Improvements relating to voltage amplitude limiting devices
Inventor: SALZMANN JEAN
IPC: H03G11/02
Filed: 1949-05-24
Abstract: 681,003. Limiting circuits. SOC. ANON. DE TELECOMMUNICATIONS. May 24, 1949 [Nov. 16, 1948; Jan. 12, 1949], Nos. 13894/49 and 13895/49. Class 40 (vi). A pair of rectifiers C<SP>1</SP>, C' are arranged in circuit with a tapped inductor L and at least one resistor R, Fig. 2, tc provide substantially con. stant output. The rectifiers are arranged with their directions of higher conductivity oppositely directed and they may be interchanged with the resistor R, Fig. 3 (not shown). In modifications, Figs. 5 and 6 (not shown), biased rectifiers are used and coupled to the tapped inductor by means of a secondary winding.
Patent GB-530620-A (GB)
Title: Improvements in or relating to thermionic valve circuit arrangements
IPC: H03F1/50
Filed: 1939-05-10
Abstract: 530,620. Valve amplifying circuits ; impedance networks. WHITE, E. L. C. May 10, 1939, No 13920. [Classes 40 (iii) and 40 (v)] An electrical network for evenly transmitting wide-band signals from a source, such as a pentode or triode valve, to a high impedance device, such as the grid circuit of a following valve, comprises a pair of branches in parallel, as shown in Fig. 2, one branch comprising a resistance aP in series with a paralleled resistance P and impedance α, the other branch comprising three series sections, a resistance Q shunted by an impedance #, a resistance bQ, and a resistance cQ shunted by an impedance c#, the multipliers a, b, c being real numbers such that a=b +e, and the impedances a, # being complex or purely imaginary and related by aP/α=bQ/#. If Q is not large compared with P, a resistance bQ/c is connected in parallel with the two branches, or is effectively incorporated in one of them. When applied as an inter-valve coupling, the impedance a may represent the anode de-coupling condenser 4 and the impedance c# the grid de-coupling condenser 10, whilst the impedance # may appear as a condenser 6 shunting a resistance 7 connected from anode of valve 1 to grid of valve 5, as shown in Fig. 1. In more complex arrangements α, #, and c # may each comprise networks of resistances and condensers. Fig. 6 shows a modified circuit which apart from the grid leak r is derivable by known transformations from the circuit of Fig. 1. The gain is independent of frequency provided that C2 R2=K2 S2 and R1+R2/R1=K1+K2/K1, and provided that the product K1r is large the range extends very closely to zero frequency. Specifications 456,450 and 527,188 are referred to.
Patent GB-1145358-A (GB)
Title: Filter cartridge
IPC: B01D46/02
Filed: 1966-03-29
Abstract: 1,145,358. Gas filter. AMERICAN AIR FILTER CO., Inc. 29 March, 1966 [22 April, 1965], No. 13925/66. Heading B1T. A gas filter comprises plurality of adjacent pleats of sheet material, the sides of each pleat being joined along seams extending approximately normally to the pleat fold lines to divide each pleat into pockets open at one end only, the seams of adjacent pleats 'being staggered and the material forming adjacent pleats being further seamed at the mouths of the .pockets (Fig. 4), but not downstream thereof (Fig. 5). This results in an inlet end of honeycomb form. Each side of each pleat may initially be a separate piece of material, each pleat may be one folded piece of material, or the whole assembly may be made from a single blank (Fig. 6, not shown). The material may be paper, cloth or felted glass fibre, may be backed by scrim and may be seamed by stitching, stapling or gluing. Pleat sides may be trapezoidal, resulting in a catenary entrance face to the filter (Figs. 1, 7, not shown), but this may be .corrected by upstream edges of pleats being initially convex (Figs. 15, 16, not shown). Pocket-forming seams may be 'dart-shaped' (12), (22), (Figs. 2, 3, not shown). Pockets may have fold lines forming triangular panels, with bases downstream (Figs. 8..11, not shown), or downstream ends may have cut away portions (Figs. 12, 13, not shown) so that each pocket has a conical closed end. Most embodiments require alternate pleats of different width and number of seams, but Fig. 17 (not Shown) illustrates a pleat with one end pocket narrower than the rest, and such pleats, each reversed relative to its neighbours, may be joined to form one filter. The gap between the filter and its supporting frame (Fig. 1, not shown) may be bridged by a pervious or impervious fabric (27).
Patent GB-219446-A (GB)
Title: Improvements in and relating to lifting-jacks
IPC: B66F3/24
Filed: 1923-05-28
Abstract: 219,446. Martin, C. May 28, 1923. Jacks.-The cylinder e of a pneumatic jack is made of cold-drawn weldless steel tube or soliddrawn brass or copper tube and is screwed at its lower end e<1> into a recess in the base f. A cover g is screwed over the upper end of the cylinder and has a central aperture g<1> for the piston rod m and a number of vent holes g<3>. The piston comprises a leather disc h and skirt h<1> and is supported by a thin metal disc i resting on a washer k. A curved metal plate l rests on the disc h and bears against a shoulder m<1> on the rod m. The parts of the piston are held together by a nut m<4>. A pump or other supply of compressed air is connected to the inlet o. An outlet cock p is provided. Reference has been directed by the Comptroller to Specifications 27668/06, 25318/09, 23831/11, and 166,138.
Patent GB-447708-A (GB)
Title: Improvements in or relating to tools for tensioning and sealing package ties
IPC: B65B13/24
Filed: 1935-05-13
Abstract: 447,708. Sealing. DICKER, S. G. S., 20, Holborn, London.-(Signode Steel Strapping Co. ; 2600, North Western Avenue, Chicago, U.S.A.) May 13, 1935, No. 14053. [Class 146 (ii)] [See also Group I] A strap is tightened round a package by a serrated feed-wheel on the spindle of a ratchet wheel 20 which is engaged by a pawl 22 on the operating handle 25 and by a holding pawl (not shown). The handle 25 is pivoted at 32 in an auxiliary frame 19 which carries sealing jaws 40, 41 operated through toggle-links 57, 58 by a lever 67 bearing on the operating handle 25. The frame 19 is pivoted at 16 in the main frame 11 and is normally retained by a catch 78 in the position shown in Fig. 4 with the sealing jaws above the strap. On releasing. the catch 78 and turning the frame clockwise, the sealing jaws are brought into position to engage the overlapping ends of the strap as shown in Fig. 2 on operation of the lever 25, and at the same time a pin 81 on the driving pawl 22 engages a cam-surface 83 on the main frame so that the pawl is held away from the ratchet wheel and the feed-wheel is not actuated by the movement of the lever 25 for sealing the strap. Since the holding pawl is mounted on the auxiliary frame 19, the tension of the binder tends to bring the frame into sealing position. The tool is held and operated by one hand. The sealing jaws are opened by a spring 59 which thus effects the idle stroke of the operating lever 25. Specification 336,390, [Class 83 (iv)] is referred to.
Patent GB-448483-A (GB)
Title: Improvements in, and relating to, colliery tub and like vehicle bodies
IPC: B61D11/02
Filed: 1935-05-14
Abstract: 448,483. Railway vehicle bodies. LONGLEY, R. R., Dearne & Dove Saw Mills, Worsboro' Dale, Barnsley. May 14, 1935, No. 14172. [Class 103 (iv)] In a colliery corve or like vehicle body of the kind in which the side and end plates a, b are formed with mutually engaging bentover or hook edges, the hooks are so constructed as to form when engaged a slot g into which a rectangular locking-bar or strip h is inserted to lock the plates together, means being provided for retaining the strip in such position. In the arrangement shown the lower end of the strip h is bent inwardly, and a securing bolt k is passed through a hole j formed in the strip at its bend and through the side and end plates and base plate d, which is preferably provided with an upturned flange e around its edges. Additional bolts may pass through the strip and plates at intervals. If desired, the slots g may be disposed on the interior of the body, or otherwise than at the corners, and the strip h may also be bent over at its upper end. For strengthening purposes the upper edges of the plates a, b are rolled over a reinforcing wire, and the bottom edges may be similarly strengthened.
Patent GB-805797-A (GB)
Title: Improvements in and relating to an anchoring device e.g. for mine roofs and walls
IPC: F16B13/06
Filed: 1956-05-08
Abstract: 805.797. Anchor - bolts. SOC. DES FORGES ET BOULONNERIES HERMANT HICGUET ET D'ARS - SUR - MOSELLE. May 8, 1956 [May 13, 1955], No. 14219/56. Class 89(1) An anchor - bolt device e comprises separable shells B1, B2, Fig. 6, surrounding a bolt A having fixed wedges C and further wedges M1, M2 secured to the bolt by means which yields at a predetermined load. Thus, as the shells and bolt are moved relatively axially, the wedges M1, M2 cause the shells to spread apart until said load is achieved whereupon said wedges are freed from the bolt which moves rapidly under the energy released to thrust the wedges C between ramps P, Fig. 9. As the bolt is moved further, the shells are spread by wedges C until bolt head T engages wedge M1 which is carried along until the head abuts or cuts into the end face of the shells. The bolt may be screwed to receive a nut S, tightening of which effects said relative axial movement. Alternatively the bolt may be engaged by a cam or key. The yielding means may comprise a collar integral with the bolt, a split or elastic ring engaging an annular recess in the bolt, or a pin passing through the bolt and engaging the wedge. In another arrangement, the bolt is reversed and engages the wedges with its screwed end, the threads yielding to release the wedges.
Patent GB-559663-A (GB)
Title: Improved sliding clasp fastener
IPC: D01H11/00
Filed: 1942-10-12
Abstract: 559,663. Sliding clasp fasteners. GOLDNER, R. Oct. 12, 1942, No. 14293. Convention date, Sept. 6, 1941. [Class 44] One or both of the elements A, B consist of two or move wires X, Y twisted together to form engaging projections. The interspaces between successive windings of each coil are locally narrower than the maximum thickness t of the windings of the other coil.
Patent GB-1433234-A (GB)
Title: Coating composition
IPC: C23D5/02
Filed: 1973-03-26
Abstract: 1433234 Enamel composition IMPERIAL CHEMICAL INDUSTRIES Ltd and T I DOMESTIC APPLIANCES Ltd 4 March 1974 [26 March 1973] 14342/73 Heading C1M A coating composition (e.g. for application to an internal surface of an oven to form a selfcleaning coating) comprises a milled "selfmatting" (devitrifiable) enamel frit, antimony trioxide or a precursor thereof which gives Sb 2 O 3  on heating (e.g. ammonium antimonite or antimonate, or antimony tartrate) and water containing less than 0À08% by weight of chloride ions. Preferably the antimony oxide or its precursor is present in an amount up to 15% by weight of the frit. An oxidation catalyst (e.g. one or more of the oxides of Cu, Mn or Co) may be present up to 50% by weight of the frit. Preferably the frit, antimony compound and catalyst (if any) are made into an aqueous slip with water containing less than 0À08% by weight of chloride ions, and applied to a metal (e.g. steel) and fired at 800-850‹ C. so that the frit undergoes devitrification to give a porous matrix having a matt or semi-matt finish. The slip, which may comprise 50-90% by weight, is preferably aged for at least 24 hours. The slip may also contain clay. The steel is preferably first degreased (e.g. with trichloroethylene vapour) etched with acid (e.g. 3-4% sulphuric acid) subjected to Nickel deposition (e.g. using 11 g./l. NiSO 4  solution at 70-75‹ C. and neutralized (e.g. using a mixed borax/sodium carbonate solution). The coating produced may have a thickness of 0À012-0À035 cm., and may be porous. The frit may be as described in Specification 1,362,948.
Patent GB-199018-A (GB)
Title: Process for the production of arc-light electrodes
IPC: H05B31/16
Filed: 1923-05-31
Abstract: 199,018. R³tgerswerke Akt.-Ges. June 9, 1922, [Convention date]. Processes.-In the manufacture of electrodes by burning a pressed mass of carbonaceous material such as coke, soot, retort graphite &c. and a binding agent such as tar oil, tar, syrup, starch &c., the raw material is rendered dense before moulding by complete removal of air which is effected by compression in vacuo. In an example the lumps of raw material are stamped or hydraulically compressed under vacuum, rolled into thin layers on calenders and the compression in vacuo repeated. The mass is then hydraulically squirted to the requisite shape and burned. Prior to the burning the mass may be impregnated under vacuum and pressure with tar oil. Colloidal carbon may be employed both as a binding agent and in the impregnation.
Patent GB-1335931-A (GB)
Title: Azepine derivatives
IPC: C07D219/02
Filed: 1971-05-12
Abstract: 1335931 Dibenzazepines CIBA-GEIGY AG 12 May 1971 [13 May 1970] 14406/71 Heading C2C Dibenzazepine derivatives (most of which are novel) of Formula I (in which R is H or CH 3 , X 1  is H, Cl or CF 3  and X 2  is H, or when X 1  is H, also Cl) are prepared by dehydrating and rearranging a compound of Formula IV accroding to Wagner-Meerwein, pref. by treating the compound IV with 70-90% sulphuric acid. The novel compounds are those in which R, X 1  and X 2  have the above meanings, except that they are not all simultaneously H. Compounds IV are prepared by reacting a compound of Formula II or a corresponding 10-methyl-acridinium compound, with acetaldehyde, to give a compound of Formula III and reducing this compound III. 3 - Chloro - 9 - methyl - acridine hydrobromide is prepared by reacting 3-chloro-5H-dibenz- [b,f]azepine with hydrobromic acid.
Patent GB-221008-A (GB)
Title: Process of producing perylenetetracarboxylic acids or their mono-imides
IPC: C09B3/14
Filed: 1923-06-01
Abstract: 3 : 4 : 9 : 10-Perylene tetracarboxylic acid, its halogenated derivatives, and the corresponding monoimides and anhydrides are prepared by hydrolyzing with strong or fuming sulphuric acid the di-imides thereof, that is, the colouring matters obtainable by alkali fusion of naphthalene-1 : 8-dicarboxylic imide or its halogen derivatives; at high temperatures the acids are obtained, at lower temperatures the mono-imides, which, by further hydrolysis also yield the acids.  The following exampes are given:-(1) the diimide of perylene tetracarboxylic acid (obtained by alkali fusion of naphthalene-1 : 8-dicarboxylic imide as described in example 1 of Specification 26690/13) is converted by heating with concentrated sulphuric acid at 180 DEG  C into a mixture of the monoimide and the tetracarboxylic anhydride; they may be separated by taking advantage of the differing solubilities of their sodium salts; (2) the di-imide is hydrolyzed similarly at 210 DEG  C. to the tetracarboxylic anhydride; the latter dissolves in solutions of alkalies from which solutions the tetracarboxylic acid is precipitated by acids; the calcium salt thereof, on heating, yields perylene; (3) tetrachlorperylene tetracarboxylic di-imide (obtained by chlorinating the diimide) is similarly hydrolyzed to the corresponding anhydride at 230-235 DEG  C.; the product dissolves in solutions of alkalies from which solutions the acid or the anhydride are precipitated by acidifying according as the solution is cold or hot.  Perylene 3 : 4 : 9 : 10-tetracarboxylic acid yields vat-dyestuffs when condensed with amines.
Patent GB-631488-A (GB)
Title: Froth flotation process and apparatus
IPC: B03D1/16
Filed: 1947-06-02
Abstract: 631,488. Froth flotation. DEHN, S. G. (Mining Process & Patent Co.). June 2, 1947, No. 14563. [Class 82(ii)] In a froth flotation process in which a body of pulp is subjected to agitation and aeration in successive stages with continuous feed and discharge at each stage, a quantity of pulp is delivered from a preceding stage to a succeeding stage in excess of the initial feed to the machine, thereby raising the liquid level in the succeeding stage above the level in the preceding stage, a quantity of pulp less than the said excess is returned to the said preceding stage and this return flow is in an amount sufficient to maintain the level differential between cells substantially constant throughout a substantial period of continuous operation. The apparatus shown in the Figure comprises a series of cells 7, a rotary impeller 9 in each cell, and conduits 16 by which pulp from a preceding cell is fed to an impeller. Adjustable weirs 14 are provided which overflow a sufficient quantity of pulp to the succeeding cell which will maintain a progressive increase in the pulp level from one cell to the next. Return flow conduits 25a between the cells are sufficiently small in cross section to maintain substantially uniform the level differentials between adjoining cells. Each return flow conduit is provided with an adjustable gate 28 by which the effective capacity of the conduit is varied. The final discharge from the series of cells is controlled by a weir 14a which restricts the flow from the last cell to an amount which allows maintenance of the pulp level regulation in the preceding stages.
Patent GB-570006-A (GB)
Title: Improvements in or relating to the manufacture of the combustion chambers of scotch boilers
IPC: F22B7/12
Filed: 1943-09-07
Abstract: 570,006. Making steam generators. RICHARDSONS, WESTGARTH, & CO., Ltd., and DORRAT, J. A. Sept. 7, 1943, No. 14637. [Classes 83 (ii) and 83 (iv)] Uniting by fusion. In the construction of a Scotch boiler combustion chamber an angle weld is formed between an edge of an end plate and an edge of the wrapper plate or of the cylindrical portion by chamfering or cutting away one or both edges so as to form a groove between them facing in substantially the same direction as the edge of the wrapper plate or cylindrical portion and welding in said groove whereby by positioning the structure with the end plate substantially horizontal the weld may be effected in the downhand position. In welding the corner joints between the end plates 1, 2 of the combustion chamber of a Scotch boiler and the wrapper plate 3, the angle between the edge and the inner surface of the wrapper plate is chamfered all the way round at 3a and the angle between the outer surface and the edge of the end plate 1 or 2 is chamfered all the way round at 1a to form a V-groove, preferably of 45 degrees, extending all the way round in which an outer weld w<1> is. effected. A sealing weld w<2> is also formed on the inner side of the joint. The V-groove may be replaced by a half-V, or by a U or half-U. The cylindrical portion 4 may be welded in a hole in the end plate 1 by chamfering the outer surface at the end of the cylindrical portion all the way round at 4a to form a half U-groove, welds w<1> and w<2> being formed. If desired a full U or a half or full V groove may be formed. The ends of the wrapper plate may be joined by an outward weld at w<1> in a U-groove and also an inner sealing weld at w<2>. The U-groove also may be replaced by a half-U, V or half-V. The chamfers 3a, 3b in the wrapper plate may be made while it is in a flat condition and the wrapper plate may be bent and the ends welded before assembly with the end plates. The end plates and cylindrical portion are welded to the wrapper plate by down-hand welding, the structure being turned over between operations. The cylindrical joint is welded from the inside of the chamber. Welding may be effected by an arc-welding head 7 supplied with welding wire from a reel 8 and linked to an element 6 moved round a template 5. The end plates may be flame cut to template in a standard flame-cutting machine or by replacing the welding head 7 by a cutting blowpipe.
Patent GB-236187-A (GB)
Title: Improvements in or relating to ferraris electric meters
IPC: G01R11/36
Filed: 1925-06-05
Abstract: 236,187. Soc. Genevoise d'Instruments de Physique. June 28, 1924, [Convention date]. Induction motor meters.-In Ferraris meters with a short circuiting ring b ad justable along a branch a of a pole piece for adjusting the phase displace ment between the fluxes of the current and voltage circuits and with a metal tongue e in the air-gap between the branch a and the moving disc for adjusting the asymmetry of the fluxes, the ring b and the tongue e are both secured on the same pole-piece by the same fixing device, preferably by a set-screw /. The right-angle tongue e is pivoted on the screw f and is held in position during adjustment of the ring b by a strip h gripped by the two set-screws of the pole-piece and lying between the tongue e and a slotted rack c carrying the ring b. The ring b is adjusted by a pinion d engaging the rack c and surrounds the tongue e to limit the adjustment of the tongue made by a laterallyextending part g.
Patent GB-402101-A (GB)
Title: Improvements in or relating to the manufacture of porous plaster
IPC: C04B28/16
Filed: 1932-05-24
Abstract: Portland cement, defined as a composition of matter having hydraulic setting properties and consisting essentially of lime, silica and alumina in chemical combination, is included in a plaster mix comprising finely divided mineral anhydrite with small amounts of gas-producing ingredients and accelerators.  Preferably the quantity of Portland cement used is less than 5 per cent by weight of the dry mixture.  In calculating the amount of gas-producing agent required, allowance is made for the degree of expansion desired and for the nature of the other ingredients.  A suitable mixture has 650 parts by weight of anhydrite, 28 of aluminium sulphate, 9 of Portland cement, 6 of potassium sulphate, and 3 of chalk, and may be gauged with 235-250 parts by weight of water.  The accelerator may be zinc sulphate, and fillers, such as sand, pumice, cork, clinker, brick dust or fibrous materials, and pigments may be incorporated.
Patent GB-354407-A (GB)
Title: Improvements in electric railway trucks
IPC: B61C9/50
Filed: 1930-05-13
Abstract: 354,407. Electric railway vehicle undercarriages and driving gear. KIRCHNER, C., 87, Buttenweg, Braunschweig, Germany. May 13, 1930, No. 14717. [Class 79 (iii).] Comprises an electric railway truck in which the radial axles b are provided with curved guide members i<1>, i<2>, co-operating with corresponding guides on an underframe q, each motor c with its shaft d and the axle driven thereby being capable of turning about a vertical axis formed by the intersection of the vertical planes passing through the axes of the motor shaft and radial axle. The motor is connected by longitudinal members h<1>, h<2> to the axle and is pivoted at r below its centre of gravity to a carriage s running on a curved guide g fixed to the vehicle body (not shown). The axle is driven from the motor shaft through a universal coupling t and gearing enclosed in a casing f. The guides i<1>, i2 are carried by bushes m<1> on the axle and bear against rollers k<1> on the underframe q. Springs o<2> are connected by longitudinal slides p, to the underframe and are fixed to boxes n<2> connected by pins to dovetail members n<5> sliding in the axle bushes m<1>.