baber/WOPTO huggingface dataset:
Patent GB-548192-A (GB)
Title: Improvements relating to apparatus for the conversion or inversion of direct electric current to alternating current
IPC: H02M7/62
Filed: 1940-09-24
Abstract: 548,192. Converting. WESTINGHOUSE BRAKE & SIGNAL CO., Ltd., and WALKER, A. H. B. Sept. 24, 1940, No. 14515. [Class 38 (ii)] An inverter comprises a vibratory commutator switch V arranged alternately to charge condensers C1, C2 from the D.C. source S1, S2 through the primary winding of a transformer T and to discharge them in a local circuit including the transformer primary, the transformer core or that of a reactance R in series with the transformer being saturable so that sparkless commutation is obtained over a wide range of load. A condenser C3 connected across either the primary or secondary of the transformer is dimensioned to produce resonance at the operating frequency. Rectifiers K1, K2 may be inserted where indicated to prevent reversal of current prior to opening of the switch contacts at low values of load current.
Patent GB-752272-A (GB)
Title: Improvements in or relating to nut assemblies for quick-acting bolt and nut fasteners
IPC: F16B39/36
Filed: 1954-05-20
Abstract: 752,272. Anchor nuts; stud and socket fastenings. WALDES IiOH-I-NOOR, Inc. May 20, 1954 [June 5, 1953], No. 14830/54. Classes 44 and 89 (1). A nut-assembly for a quick-acting bolt and nut fastener, e.g. a panel-fastener for aircraft, comprises a shell having a tapered part 18, Fig. 1, and a cylindrical part 20, opposed nutsegments 31, 32, secured against turning relatively to the shell by having grooves 34, 34a engaging ribs 19, 19a, and having tapered peripheries corresponding to part 18. The segments are urged apart by spring members 35, 35a attached thereto, to normally reside at the larger diameter end of part 18. Levers 42, pivoted to ears 46 bent from a resilient plate 47, have arms 44 abutting the larger ends of the segments and arms 43 protruding into the bore which receives a bolt 12, Fig. 4, whereby the bolt pivots the levers to urge the segments towards the smaller diameter end of part 18 and into threaded engagement with the bolt. Slight rotation of the bolt tightens the fastener. Plate 47 is supported by the rim 21 of part 20 and its resilience permits a long bolt to deflect the segments and levers and ratchet past the threads of the segments during insertion. Members 35, 35a, each consist of two leaf springs 38 interconnected by a part 36 received in a recess 40 in each segment,. the opposing levers pressing against each other. The smaller end of part 18 is fixed to a reinforcing ring 29 having a rectangular flange 28 loosely engaged by a cage 23 riveted to the frame 11 surrounding the panel opening. The shell is closed by a dust cover 22. Specification 692,919 is referred to.
Patent GB-528958-A (GB)
Title: Improvements in or relating to the control of electric induction motors
Filed: 1939-05-18
Abstract: 528,958. Control of A.C. motors. IGRANIC ELECTRIC CO., Ltd. May 18, 1939, No. 14853. Convention date, May 19, 1938. [Class 38 (iii)] An induction motor subjected to heavy or light loading conditions, according, for example, to the number of units of a printing machine coupled to it, is connected in delta for heavy loads and in star for light loads, resistance in the secondary circuit being increased to the same extent for the same speed reduction under either condition. The connections for the primary winding P are effected by a switch 8, 9, 10, and the secondary resistance, comprising sections 14-16, and tapped sections 19-21, are controlled to give three resistance valves by a switch 22. The resistances 14-16 are varied by means of a slider 17.
Patent GB-1097671-A (GB)
Title: Improvements in and relating to cartridge syringes
Inventor: SHAILER THOMAS FREDERICK CHATT
IPC: A61M5/24
Filed: 1964-04-10
Abstract: 1,097,671. Hypodermic syringes. WILLOWS FRANCIS Ltd., [trading as PHARMACEUTICAL MANUFACTURING CO.], April 9, 1965 [April 10, 1964], No. 14973/64. Heading A5R. A cartridge hypodermic syringe comprises a barrel 10, made of polystyrene, polyethylene or polypropylene, at one end of which is fixed a double ended needle 26 which pierces a medicament cartridge 29 when loaded in the barrel and the other end of which is open to receive a polyethylene bushing 16 in which a styrene plunger 18 is slidable. The needle 26 has a removable sheath 32. Units each comprising a barrel, cartridge and needle or the whole syringe are sterilised and packed in a polyethylene or metal foil envelope. The same bushing and syringe may be used to operate several barrel, cartridge and needle units. The stem of the plunger or the barrel may be calibrated. The syringe barrel may be made in two identical halves each having corresponding grooves (86) of semicircular section at the forward end such that when they are secured together, e.g. by cementing or welding the needle hub is held in the grooves.
Patent GB-910515-A (GB)
Title: Improvements in or relating to control valves and to plant incorporating control valves
Inventor: BAUER STEFAN GEORGE
IPC: G21D1/02
Filed: 1959-05-01
Abstract: 910,515. Nuclear reactors. ROLLS-ROYCE Ltd. May 19, 1960 [May 1, 1959], No. 15054/59 Class 39 (4). [Also in Group XXIX]  A nuclear reactor 50 has double - walled fuel - element receiving tubes 51 through which steam is fed for cooling purposes and the thin inner walls of which are supported by pressurized helium which is fed to the space between the walls from storage bottles 55 via a control valve 54 (see Group XXIX), which ensures that the helium pressure is equal to or slightly less than the pressure of the cooling steam. A pump 74 continuously circulates the heavy water moderator liquid via coolers 71, 73. The control tubes 80 are fed with heavy water from a dump tank 81 and the level of the heavy water in the tubes is varied, to vary the reactivity of the reactor. A pump 98 draws helium from the bottles 55 to provide a helium atmosphere for the dump tank 81 from which it passes to a weir tank 101, a cooler 103, a flame trap 105 and a recombiner 106. The weir tank 101 is located above and is connected to the reactor tank 50 and provides a collection space for the dissociation products-deuterium and oxygen-whiich are carried to the recombiner 106 which receives make-up oxygen from a bottle 120.
Patent GB-862443-A (GB)
Title: Improvements in dye-sensitized photographic emulsions
IPC: C09B23/01
Filed: 1957-05-13
Abstract: Dyes are described which have the general formula:- <FORM:0862443/IV(c)/1> wherein R is an alkyl or substituted alkyl group, R1 is hydrogen or an alkyl group of 1 to 4 carbon atoms, R2 is hydrogen or an alkyl or alkoxy group of 1 to 4 carbon atoms or a phenyl, substituted phenyl or 2-thienyl group, or R1 and R2 together complete a cyclopentane or cyclohexane ring, n is 0 or 1 and Z completes a 5- or 6-membered heterocyclic nucleus. The general methods for making such dyes are reviewed, and examples given of the preparation of dyes of formula I wherein Z completes a benthiazole, naphthothiazole, benzoxazole, benzselenazole, indolenine or thiazolidine nucleus, R is methyl or ethyl, R1 is H or methyl and R2 is H, methyl, ethoxy, phenyl or 2-thienyl or R1 and R2 complete a carbocyclic ring as above.  Specifications 581,772, 704,770 and Belgian Specifications 506,549 and 519,732 are referred to.
Patent GB-713286-A (GB)
Title: Improvements in derivatives of purine
Filed: 1951-06-14
Abstract: The invention comprises 6-mercaptopurine and its preparation (1) by treating hypoxanthine with a reagent capable of converting a hydroxy group to a mercapto group, and (2) from 4-amino - 5 - formamido - 6 - hydroxypyrimidine by heating in solution in a solvent and simultaneously or subsequently treating with a reagent as in (1), e.g. phosphorus pentasulphide.  Suitable solvents for method (2) are pyridine and tetrahydronaphthalene. An example is given of each method.  The product is an intermediate for the compounds of the parent Specification.
Patent GB-194987-A (GB)
Title: Improvements in or relating to cooking utensils
IPC: A47J27/20
Filed: 1922-05-30
Abstract: 194,987. Carr, Ltd., G. E., and Thornton, J. May 30, 1922. Heating and cooking vessels.- A ham cooker comprises an outer vessel A, Fig. 2, fitted with a detachable liner B within which the ham is contained, the liner consisting of two portions hinged or otherwise connected together at the bottom as shown in Fig. 3. Both liner and outer container are provided with covers and handles, and the lower wall of the outer vessel is perforated at A<2> to facilitate heating.
Patent GB-349290-A (GB)
Title: A new or improved window blind, sun screen or the like
IPC: E06B9/36
Filed: 1930-05-17
Abstract: 349,290. Window blinds. MOUNTFORD, G. E., 738, Yardleywood Road, Billesley, Birmingham. May 17, 1930, No. 15195. [Class 52 (v).] A sunblind consists of a number of vertical slats connected at their upper ends to lazytongs which are slidably suspended from a bar. In the construction shown the slats 1 are suspended from wire rods 7 depending from the lazytongs 4 which carry loops 10 slidably embracing a rod 8. The wires 7 may be set at an angle to the links to which they are attached. A spring buffer is provided at one end of the rod 8 to limit the collapsing movement of the lazytongs. The slats, which are of amber &c. coloured celluloid &c., are slit transversely at 1b and bound with tape along their edges to prevent longitudinal twisting. The edges may be bent so that adjacent edges can be interlocked when the blind is completely opened out.
Patent GB-371645-A (GB)
Title: Improvements in or relating to air pressure brakes
IPC: B60T15/18
Filed: 1931-05-22
Abstract: 371,645. Fluid - pressure brakes. ELDERHORST, J. M., Stompwijk, Holland. May 22, 1931, No. 15208. Convention date, May 23, 1930. [Class 103 (i).] In a triple valve having a piston 2 influenced on one side by auxiliary reservoir pressure in the chamber 4 and on the other side by train pipe pressure in the chamber 3 and adapted to operate a slide valve 7 and having a piston 22 in a separate cylinder chamber 20 influenced by brake cylinder pressure in order that a graduated application and release may be obtained, the chamber 20 communicates with the triple valve chest, and the piston 22 extends with a bar 25 into the space of the triple valve chest which communicates with the train pipe and the chamber 20 communicates on the other side of the piston with the brake cylinder by a pipe 24. The piston 22 may comprise two or more coupled pistons of different diameter so that the brake may be applied in a number of different steps at the same decrease of train pipe pressure by controlling the connection of the pistons with the cylinder by means of a cock. Supplementary reservoirs may be connected to the auxiliary reservoirs by means of a cock to vary the braking power on loaded and unloaded vehicles. A valve 27 on the end of the bar 25 prevents leakage from the train pipe when the pressure therein is at a maximum. The piston 22 is adapted to be returned by a spring 21 and its right-hand side is connected to atmosphere. On fall of train pipe pressure a slide valve 10 is first moved by lugs 11 and then the slide valve 7 is moved to cut off the connections 12, 16 of brake cylinder 14 with the atmosphere and connect the brake cylinder by a passage 9 with the auxiliary reservoir 6. Rise of brake cylinder pressure acting on the piston 22 moves back the piston 2 and graduating slide valve 10 to cover the brake cylinder supply port 9 and thus obtain a lap position. On increase of train pipe pressure to release the brakes the pistons 2, 22 move to the right and'the brake cylinder and piston 22 are connected to atmosphere by passages 12, 16 until the pressure on the piston 22 has fallen to such an extent that the pistons and valves are moved back by the pressure on the right-hand side to obtain a lap position.
Patent GB-1308187-A (GB)
Title: Multiple plough
IPC: A01B15/02
Filed: 1970-03-31
Abstract: 1308187 Ploughs HUARD UCF SOC ANON DES ANCIENS ETS HUARD CARRIERE-GUYOT FONDEUR & UNION CHARRUES FRANCE 31 March 1970 [31 March 1969] 15223/70 Heading A1B A plough has a plurality of ploughing elements each comprising a shore 10 and a mouldboard 11 the lateral cutting edges of which are designed so that they cut a furrow, having a lateral wall 13 and a bottom wall 14 the top edge of the lateral wall 13, and the meeting line between the lateral wall 13 and bottom wall 14 lying in a plane which forms an obtuse angle with the bottom wall. The strip of earth d cut from such a furrow is turned more quickly and with less effort by the mouldboard, and interfits with previously cut strips, thus allowing the elements to be positioned close together longitudinally of the plough which may be simple balanced, quarter turn or reversible. The lateral cutting edges may be in the form of a straight line, a convex curve, a concave or convex dihedron or a convex curve terminating in a vertical line. Both the share and mouldboard may have wear resistant portions. There may also be a counter slade (45) Fig. 15 (not shown) attached to the slade 12, the counter slade supporting a spring biassed vertical fin (49).
Patent GB-1134911-A (GB)
Title: Torque control device for air wrenches
IPC: B25B23/145
Filed: 1967-04-03
Abstract: 1,134,911. Impact wrenches. KOBE STEEL Ltd., and NIPPON AIRBRAKE CO. Ltd. 3 April, 1967 [2 April, 1966], No. 15228/67. Heading B3N. A pneumatically actuated impact wrench 2 has a torque control which regulates the pressure of air supplied to the wrench, and also provides for supply of the pressurized air for a predetermined period of time. Air is supplied from a source SUT, through a reducing valve 1, and a throttled by-pass 4, to the wrench 2. When a valve is actuated in the wrench, the air on the right-hand side of throttling portion 4 is used up, and due to the difference in pressure on both sides of portion 4, a switch actuator 5 is actuated and closes a switch 6. A solenoid SOL is energized to open a change-over valve 3, and the wrench is set in motion. After a predetermined period of time, a time switch 7 is actuated to de-energize solenoid SOL, valve 3 is closed, and the operation of the wrench ceases.
Patent GB-396523-A (GB)
Title: Improvements relating to tee squares for use on blackboars, drawing-boards and the like
IPC: B43L13/04
Filed: 1932-05-30
Abstract: 396,523. T-squares. KINGFISHER, Ltd., Charles Street, West Bromwich, GILBERT, F. W., 68, Heathfield Road, Handsworth, Birmingham, and CHATWIN, A., Wightwick, Wolverhampton. May 30, 1932, No. 15264. [Class 97 (iii).] To secure temporarily a T- square to a blackboard or drawing board a movable wedge is provided between an edge of the T-square head and an abutmentonthe board. In the form shown in Fig. 1, a guide strip e is fixed to the board a and the T-square head c carries a strip f adapted to engage an edge of the strip e and a strip g having an inner edge g<1> inclined to the edge of the strip e so that a movable wedge h can be arranged therebetween. The wedge h is moved to or from the clamping position by a thumb lever j, pivoted in the head c. Alternatively the wedge may be moved by means of a projection working in a slot in the head c. In the modification shown in Fig. 7, the T-square head has a rib r working in a groove q down one edge of the board a. In the cavity formed by a groove s in the edge face of the board and an opposite recess in the T-square head. are arranged a wedge shaped free strip t and the wedge proper h adapted to be moved by the knob m projecting through a slot in the head. The free end of the blade b is provided with. a rib t<1> working in the. groove s<1>. Alternatively the blade may carry a pair of strips co-operating with a guide strip fixed to the board.
Patent GB-1424686-A (GB)
Title: Arrangement for joining optical fibres
IPC: G02B6/38
Filed: 1973-03-30
Abstract: 1424686 Light guides WESTERN ELECTRIC CO Inc 30 March 1973 [31 March 1972] 15336/73 Heading G2J A method of joining optical fibres end-to-end comprises inserting them in a sleeve which aligns them correctly and then bonding together the  adjacent ends of the fibres with a fusible bonding material. Bonding is performed by inserting transparent themoplastic material, e.g. polymethylmethacrylate, into the sleeve through an aperture in the sleeve intermediate its ends, and melting the material by electric heating. Preferably the sleeve is made of or coated with an electrically  conducting material, e.g. it may be made of brass, or be coated with chrome-gold or iridium oxide, and heating is by passing an electric current through the sleeve or its coating.
Patent GB-494119-A (GB)
Title: Improvements relating to engine starters
IPC: H02K7/12
Filed: 1937-06-03
Abstract: 494,119. Turning-gear. SPERRY GYROSCOPE CO., Inc. June 3, 1937, No. 15393. Convention date, July 30, 1936. [Class 7 (v)] An engine starter comprises a clutch member which is quickly advanced axially into engagement with the engine by axial movement of the armature 28 of an electric motor 27 when the latter is energized, and power-driven gearreduction means for thereafter driving the clutch member at relatively low speed. In the form shown, the gear-reduction means is a planetary gear train of substantially the construction described in Specification 488,388 and is driven by an electric starting motor 2. In order to prevent vibration, each of -the planet gears 12 is provided with a balance weight 44 equal to one-third of the total unbalanced weight of the gear plate 18 and the eccentric hubs 15 of the gears 12. The head portion 1 of the clutch member has on its rear face a series of fine ratchet teeth 26 engaged by corresponding teeth on a body portion 25 splined in a sleeve 22 extending from the frame 9 supporting the planet gears 12. The motors 2, 27 are both switched on by a switch 37, and when engagement of the clutch 1 has been effected, a resistance 43<1> is inserted in the circuit of the motor 27 by the separation of contacts 40, 41. The motor 27 then serves to keep the clutch 1 in engagement as long as the switch 37 is closed, so that reversal of the engine under back-fire is prevented. In a modification, the engagement of the clutch is effected by axial movement of the armature of the starting- motor itself, which is connected to the clutch member by a rod passing axially through the planetary gearing, and the head and body of the clutch member are integral, the ratchet connection 25, 26 being omitted.
Patent GB-200802-A (GB)
Title: Improved retaining valve for use with fluid pressure braking apparatus
IPC: B60T17/04
Filed: 1923-06-13
Abstract: 200,802. Westinghouse Brake & Saxby Signal Co., Ltd., (Assignees of Compagnie des Freins Westinghouse). July 11, 1922, [Convention dale]. Void [Published under Sect. 91 of the Act]. Couplings, disconnectible.-Pressure-retaining valves such as are applied to the exhaust passages of the triple valves of the brakes of railway trains to prevent release of the brakes when it becomes necessary to recharge the auxiliary reservoirs during an application of the brakes are mounted so as to be readily detachable when not required. For this purpose the retaining valve f is disposed in a part d adapted to be coupled to a part a fixed to the vehicle and connected to the exhaust pipe c of the triple valve. The coupling shown is of the kind commonly used for coupling the train-pipe except that only the washer g on the removable part d is of rubber, the washer h which is subject to exposure being of bronze. The recess containing the valve f is closed by a threaded nut e provided with an exhaust passage k.
Patent GB-129174-A (GB)
Title: Improvements in or relating to Footboards for Motor-cycles or like Vehicles.
Inventor: STEER FRANK ERNEST
IPC: B62J25/00
Filed: 1918-09-23
Abstract: 129,174. Steer, F. E. Sept. 23, 1918. Foot rests or boards for motor-cycles &c. are hinged at one end about a relatively stationary pin and supported towards the other end through the medium of a leaf spring from the hinge-pin or a part carried thereon. As shown in Figs. 1 and 2, the footboard is rotatably mounted at the front upon a pin B fitted with an adjustable arm C carrying a projection C<3>, a laminated spring D fixed to the rear portion of the board being arranged at its front end to bear upon the projection. In a modification the board is rotatable upon a sleeve which is adjustable upon the fixed hinge-pin, the thick end of a laminated spring being bolted to the sleeve and the thin rear end arranged to bear upon a roller on the underside of the board; stops are provided to limit the downward motion of the board.
Patent GB-420305-A (GB)
Title: Improvements in and relating to means for obtaining constant voltage from variable speed dynamos
IPC: H02P9/24
Filed: 1933-05-29
Abstract: 420,305. Variable-speed generator systems; automatic regulation. DYNAMIC DEVICES, Inc., 2973, Kingsley Road, Cleveland, Ohio, U.S.A. May 29, 1933, No. 15464. Convention date, Oct. 29, 1932. [Class 38 (iv)] An accessory device for application to a variable-speed generator to give voltage regulation comprises a vibratory relay having a winding in two sections, one section 12, Fig. 6 of which is linked with one of the generator poles, the other section of which links the magnetic circuit of the relay. This winding is connected in parallel with the armature and acts as a bucking winding. When the voltage exceeds a predetermined amount the relay operates and inserts a resistance 51 in the normal field circuit 8, 9. A construction is shown in Fig. 2 in which use is made of the opening 16 provided for inspection of the armature, &c. A metal tray 18 is mounted in this opening and clamped in position by a strap 21. The relay core 27 is mounted on the underside of the tray, the end pieces projecting through the tray to form polepieces 26, 27 for an armature 33 having contacts 40, 41. The resistance is mounted by the side of the armature and connected to the contacts 40, 41, Fig. 9, shows a modification in which the winding links the magnetic circuit 80 of a further relay 81 which operates as a cut-out switch. When the voltage exceeds a predetermined amount the contacts 84, 85 are closed to complete the load circuit. To give positive opening of the relay a reverse current winding 88 is provided. In a further modification the relays may be provided with separate windings which are in series with the winding. The armatures of the relays are provided with adjusting means to enable the point of response to be adjusted. Specification 420,304 is referred to.
Patent GB-332676-A (GB)
Title: Improvements in spray producers and powder distributors
IPC: B05B7/14
Filed: 1929-05-17
Abstract: 332,676. Adams, A. W. May 17, 1929. Lift valves.-A casing 19 contains a disc valve 42 engaging a valve seat 43 and carrying a pear-shaped extension 44 which is engaged by a tube 20 when the casing 19 is moved forward relatively to the tube 20 so as to open the valve.
Patent GB-1419909-A (GB)
Title: Preparation of citraconic acid
IPC: C07C57/155
Filed: 1974-04-08
Abstract: 1419909 Citraconic acid and anhydride PFIZER Inc 8 April 1974 [12 Sept 1973] 15537/74 Heading C2C Citraconic acid or anhydride is obtained by heating citromalic acid, mesaconic acid, paraconic acid, 3-methylmalic acid or a mixture thereof at 160-330‹ C., removing the resultant vapour and recovering citraconic acid or anhydride from this vapour. Inert gaseous or liquid diluents may be present. In one method exemplified, a solution of the reactant in an inert solvent (water or ketone) is passed as a spray mist in an inert gas into a reaction zone containing solid particulate material (e.g. alumina); a catalyst (alkali metal, alkaline earth metal or magnesium salt of phosphoric acid, pyrophosphoric acid, boric acid or sulphuric acid or the corresponding free acid) may be supported on the solid; the required product may be recovered by condensing in cold traps, absorption in a scrubber using for example water, or by fractional distillation procedures. Another method of carrying out the process is to place reactant in a distillation vessel, heat (preferably at 15-100 torr) and distil and collect the required product; a catalyst (as above) may be present in the vessel.