baber/WOPTO huggingface dataset:
Patent GB-426455-A (GB)
Title: Process for producing sulphur by means of reduction of gases containing sulphur dioxide
IPC: C01B17/04
Filed: 1934-06-12
Abstract: In the production of sulphur by the interaction of sulphur dioxide and producer gases, the producer gas, while still in a heated condition, is directly brought together wth the sulphur dioxide gas into a contact chamber maintained at a temperature between 500 and 1050 DEG  C., preferably between 700--800 DEG  C., the products being then passed through an electrostatic precipitator to remove solid impurities while the sulphur is still in the vapour state.  The chamber is filled with contact material, e.g. brick, coated with iron or iron compound, e.g. ferruginous bauxite, or with an alkali compound, e.g. sodium carbonate.  To obviate contamination by solid impurities, fresh catalyst is continuously introduced in finely-divided or dissolved condition. The sulphur dioxide may be preheated.
Patent GB-1300556-A (GB)
Title: Improvements in cycloconverters
Inventor: JENKINS JOHN EDWARD
IPC: H02M5/27
Filed: 1969-04-02
Abstract: 1300556 Frequency conversion J E JENKINS 25 March 1970 [2 April 1969] 17420/69. Heading H2F In a cycloconverter for reducing the frequency supplied to a polyphased load from a polyphased supply 10, a plurality of bi-directional controlled rectifiers 21 ... 51 are connected in such a way that the only paths for substantial current from the supply are by way of the load, even if all the controlled rectifiers were to become conductive. As shown in Fig. 1, a variable speed induction motor has four windings R A  ... B<SP>1</SP> D , bifilar of quadrifilarwound in each phase belt. The current from a two-phase, high frequency alternator 10 is arranged to flow in pulses lasting for one quarter of a cycle of alternator frequency by triggering thyristors 21 ... 51 at appropriate times under control of logic circuits (Figs. 5, 8, 9, not shown). The thyristors may be replaced by transistors or MOSTs. Each anti-parallel pair of thyristors may be replaced by a Triac. Fig. 7 shows an alternative arrangement for a star-connected three-phase induction motor R A  ... B C  supplied from a three-phase generator 70. Capacitors 162 ... 164 may be included to compensate for the winding leakage reactance. The logic circuits (Figs. 8, 9, not shown) may be responsive to the anode voltage of the controlled rectifiers so as to feed control signals to their gates only when the anode voltage is of correct polarity. The invention is also applicable to control of linear induction motors, or to the generation of travelling magnetic fields for heating and stirring molten metal.
Patent GB-213175-A (GB)
Title: A new or improved handle for metal hollow-ware and the like, and a method of manufacturing the same
IPC: A47J45/06
Filed: 1923-07-05
Abstract: 213,175. Hill, E. July 5, 1923. Handles.-A bent or bowed handle for hollow-ware vessels &c. is formed from metal strip having flangedover edges which may be beaded, as shown, at c, Fig. 5, the strip being fluted to V-, semi-circular, curved, or other section. The strip is bent, as shown in Fig. 1, to produce the shape of handle required, the ends d being flattened and bent to the angle required for attachment to the vessel.
Patent GB-530033-A (GB)
Title: An improvement in or relating to metal-planing machines
IPC: B21D51/32
Filed: 1939-06-15
Abstract: 530,033. Preventing backlash in planing machines. SWIFT-SUMMERSKILL, Ltd., and EASTWOOD, W. P. June 15, 1939, No. 17446. [Class 80 (iii)] In order to avoid tool-drop in a metal planing machine, due to backlash between the vertical screw c and the nut b secured to the tool-slide a an auxiliary nut d mounted on the screw is adjusted to compress a spring e so that the spring supports the dead weight of the tool slide. Backward rotation of the auxiliary nut is prevented by a pin g engaging a groove f.
Patent GB-358498-A (GB)
Title: Unitary synchronized talking machine and picture exhibitor
IPC: G03B31/00
Filed: 1930-06-05
Abstract: 358,498. Associated gramophone and picture-exhibiting apparatus. GETGEY, J. J., 2217, Park Avenue, Cincinnati, Ohio, U.S.A. June 5, 1930, No. 17472. Convention date, June 21, 1929. [Class 40 (ii).] A picture-exhibiting machine is operated intermittently through means controlled bv an associated gramophone. The apparatus is housed in a casing 8 which contains a gramophone driving mechanism 9, which also drives a wheel 12 near the periphery of which is a projecting lug 13, as shown in an inverted plan view by Fig. 3. The pictureprojecting system is housed in the end 22 of the casing 8 and comprises a source of light 19, reflector 20 and a lens assembly 17. A slotted block 23 acts as a guide for carrier 27, Fig. 6, for the picture film strip. Pivoted to a support 32 is a lever 31 having projections 33, 41 which are normally held in the path of travel of lugs 34 on the side of the carrier 27 when the latter is inserted in the apparatus, through a slot 22a, so that a picture may be projected. When, upon each rotation of the wheel 12, the lug 13 contacts with the end of the lever 31, the projections 33, 41 are moved out of the way of the lugs 34 so that the carrier 27 commences to fall. Immediately thereafter, the lever 31 is swung backwards by a spring 35 so that the projection 41 first strikes the edge of the carrier 27 to prevent the lever 31 being swung too far inwards and to exert a slight braking action on the carrier, after which the latter comes to rest on the projection 33, in position to project the succeeding picture. A flanged end 30 is provided on the carrier 27 so that it cannot drop out through the bottom of the casing, after the last picture has been projected. Specifications 3715/13 and 200,242, [both in Class 40 (ii), Phonographs &c.], are referred to.
Patent GB-142154-A (GB)
Title: Improvements in and relating to hangars for aeroplanes and to similar structures
IPC: E04B1/343
Filed: 1918-10-26
Abstract: 142,154. Richards, T. E. Oct. 26, 1918. Roofs.-In erecting a hangar or like structure, the roof is assembled on the ground complete with the rafter trusses 1, 2, 3, 4 connected by the purlins 5, 6, 7 and ridge 8, and the whole is then lifted bodily by means of derricks 12, 13 at the four corners of the roof. A tension member 10 extending beneath the centre trusses is provided to resist bending. Posts 15, 16, 17 are next placed beneath the end trusses 1, 2, and posts 16 beneath the rear of the trusses 3, 4, the front being left clear. Rakers or struts 20 are then added. The erection derricks may form part of the permanent structure. In a, modification, the roof is assembled in longitudinal sections which are separately raised, supported, and then connected together. The compound members, of the trusses are connected together by junction fittings, which may be of the kind described in Specification 137,548.
Patent GB-1220936-A (GB)
Title: A gas expansion machine
Inventor: SMITH KENNETH CECIL
IPC: F25B9/06
Filed: 1967-04-18
Abstract: 1,220,936. Refrigerating. BRITISH OXYGEN CO. Ltd. 18 April, 1968 [18 April, 1967], No. 17690/67. Heading F4H. [Also in Division F2] Compressed gas is admitted to a chamber formed by a piston and cylinder and withdraws the piston against a biasing means, the energy thus extracted from the gas being absorbed by an hydraulic brake. As illustrated, a cylinder 2 contains an annular piston 1 which carries a regenerator 17 and is biased towards its illustrated advanced position by a spring 11. The piston is carried by a hollow rod 4 which serves for the supply of gas to and the exhaust of gas from the expansion chamber 3. The rod 4 carries a flange 14 which moves in hydraulic fluid in a container 13 and has a small fixed orifice 15 and a one-way valve 16 which allows unrestricted flow of fluid during piston withdrawal but is closed during piston advance. A projection 10 at the top of the rod 4 operates a valve 5 to align a port 9 with a compressed gas inlet passage when the piston is at its most advanced position and to move the port into alignment with an expanded gas outlet passage 8 when the piston is in its most withdrawn position. In operation, compressed gas is admitted to the expansion chamber, thereby withdrawing the piston and storing energy in the spring 11. The brake has no damping action during this movement since the valve 16 is open. When the piston is fully withdrawn, the port 9 is brought into alignment with the outlet passage 8 through which gas freely expands. During this expansion the piston acts as a displacer and is moved by the spring 11 to its fully advanced position against the action of the brake so that the bulk of the energy stored in the spring is absorbed by the brake. The side walls of the expansion chamber are provided with insulation 19, and the lower uninsulated wall 18 provides a source of refrigeration. The regenerator 17 is packed with copper turnings or aluminium wire. In another embodiment, Fig. 2 (not shown), the return spring is only strong enough to operate the piston as a displacer and the brake retards the withdrawal stroke so that energy is directly absorbed by the brake. In addition, the compressed air inlet is closed part way through the withdrawal stroke. The piston-rod passes through an opening in a fixed flange in the hydraulic brake. The flange is provided with the small orifice and the non-return valve and fluid is forced against it during the withdrawal stroke by a piston carried by the rod. That part of the piston-rod which passes through the flange opening is tapered in such manner that as the withdrawal stroke progresses, fluid is increasingly allowed to pass through the opening thereby reducing the braking action.
Patent GB-214135-A (GB)
Title: Casings for springs
IPC: F16F1/24
Filed: 1923-07-09
Abstract: 214,135. Dennison, T. J. July 9, 1923. Gaiters.-Casings for springs are made in sheet form of leather, canvas, &c., and wrapped about the spring, the longitudinal edges being secured by a lapped joint preferably in conjunction with a tongue. As shown in Fig. 1, the edge 6 of the sheet 3 is bent so as to embrace the outstanding edge 5, and registering holes are provided for lacings 8, 10<a>. In addition, a tongue 13, Fig. 5, may be provided, secured to the interior of one edge of the sheet, and, in order to secure a snug engagement of the ends of the casing with the spring, strips 14 of felt are attached to the ends of the casings as shown in Fig. 1. The joint may be reinforced by means of exterior flaps 18 secured to the sheet 3 and overlapped as shown. In a modification, the edges of the sheet may be laced with a simple overlap. As shown in Fig. 7, the joint is secured by a strap 27 laced through slots 29 and having a buckle 28 at one end to serve as anchoring means.
Patent GB-184011-A (GB)
Title: Improvements in wire strap seal and method of forming the same
IPC: B65D63/12
Filed: 1921-06-29
Abstract: 184,011. Lurcott, W. N. June 29, 1921. Seals.-A wire strap for encircling and securing bales, packing-cases, &c. has one end formed into a spiral 8 enclosing a portion 11 parallel with and at one side of the axis of the spiral. The free end 13 is passed through the spiral, the wire is tightened, and the helix is flattened to crimp the portions 11, 13 and secure the wire. The helix may be formed separately to the wire 9, or may be formed as a flattened spiral.
Patent GB-123784-A (GB)
Title: New Process of Treating Celluloses.
IPC: C08B1/00
Filed: 1917-12-01
Abstract: 123,784. Manchester Oxide Co., Clayton, R. H., Huebner, J., and Williams. H. E. Dec. 1, 1917. Cellulose solutions.-Solutions or viscous, or gelatinous masses are obtained by treating cotton or other cellulose with solutions of thiocyanates such as those of calcium, manganese, strontium, or lithium. Thiocyanates which are insoluble or sparingly soluble, such as mercury thiocyanate, may be used in conjunction with those which are more soluble, such as sodium thiocyanate. Salts such as calcium chloride, or salts which dissolve cellulose, or acids such as acetic, may be added to the solution.
Patent GB-678884-A (GB)
Title: Improvements in means for converting varying electrical quantities into currents of varying frequency
IPC: H03K7/06
Filed: 1950-07-17
Abstract: 678,884. Current, voltage, and wattage measurement. GENERAL ELECTRIC CO., Ltd., and CHUBB, A. A. May 18, 1951] July 17, 1950], No. 17821/50. Class 37. [Also in Groups XXXVIII and XL (c)] A varying electrical quantity is converted into a varying frequency by applying it as a bias to the grid of a valve whose anode supplies the driving voltage to a relaxation oscillator generator to vary the frequency thereof; and a voltage proportional to this frequency variation and derived therefrom is fed back to the valve grid in opposition to the voltage derived from the electrical quantity. The oscillator generator may be of the neon-tube type, and the electrical quantity may be current, voltage, or wattage. In Fig. 1, the quantity is an alternating current applied through a transformer T2 and rectifier MR2 to create a D.C. voltage across a resistor R4 in the grid circuit of a valve VI. The grid is given a negative bias by the resistor R3 which is the load resistor to a rectifier fed from the cathode heater supply through a transformer T1. As the input current to T2 rises, the grid of the valve V1 is driven more negative and the anode more positive. The anode voltage is used as the driving voltage for a relaxation oscillator, comprising a neon-tube V2 shunted by a condenser C4, both being connected in series with a resistor R6. Saw-tooth voltage waves are thus generated across the resistor R6, the frequency of which is dependent on the input current strength at T2. These waves are smoothed by the network R5, C3, and the smoothed output, which is proportional to the wave frequency, is applied as a positive voltage to the grid of the valve V1 in opposition to the input voltage across the resistor R4. The reverse feed-back thus provided reduces the effect of variations in valve emission, H.T. supply &c. The saw-tooth waves may be transmitted over a line to an indicator in the form of a frequency meter. Alternatively they may be differentiated by a network C5, R7 to provide rectangular pulses which may be amplified in a valve V3 to operate a relay P in the cathode load. The contact P1 may transmit the pulses to an outgoing line. When it is required to transmit watts instead of voltage or current, a D.C. voltage proportional to the wattage is developed across the output resistor R9 of a rectifier bridge MR1 ... MR4, Fig. 2, across the diagonals of which are applied A.C. voltages proportional to the supply voltage V and the load current A, the output resistor R9 being connected across centre tappings of the input transformers T3, T4. Owing to the balanced input, the voltage across R9 is confined to a direct voltage and to a voltage of double frequency; the latter is excluded by a low-pass filter L, C6, C7, and the former is equal to AV cos # and represents the wattage, # being the phase angle between A and V. The filter terminals are connected across the resistor R4 of Fig. 1.
Patent GB-1430705-A (GB)
Title: Blowout preventer
IPC: E21B33/064
Filed: 1974-04-24
Abstract: 1430705 Valves C JIM STEWART & STEVENSON Inc 24 April 1974 17833/74 Heading F2V [Also in Division E1] A pilot-operated valve for locking a ram of a blow-out preventer has a valve member 50 for controlling flow between an inlet 46 and an outlet 48 and movable between a closed and an open position by pilot pressure fluid communicated to respective ports 52, 54 and acting on pistons. The end of the valve member is formed as a further piston 62, the end of which is subjected to inlet fluid pressure via passages 68, 70 so that even if pilot fluid pressure is present at the valve closing port 52 the valve may be opened by raising the inlet pressure. Each of the rams (12-18) of the blowout preventer are connected to an inlet pressure source by a separate pilot-operated valve 40a-(40d), the ports 52, 54 of which are connected to common pilot lines 42, 44, respectively. One of the rams can thus be actuated without actuation of the others by raising the respective inlet pressure.
Patent GB-461741-A (GB)
Title: Improvements in and relating to machine guns
IPC: F41A9/33
Filed: 1935-06-21
Abstract: 461,741. Machine guns. WILLIAMS, D. M. June 21, 1935, No. 17881. Convention date, March 19. [Class 92 (ii)] Relates to belt-fed machine guns in which the breech bolt 27, Fig. 1, reciprocates in a short-recoil actuator 32, which may be operated by a recoiling barrel, a gas-piston, or, as in the example shown, by a recoiling chamber 30. According to the invention, the actuator carries a member 53, Figs. 1 and 3, normally spaced below the belt 59, for extracting cartridges from the belt during the short recoil, the belt being depressed into engagement with the extractor 53 by a member, such as a spring-pressed rocker 42 on the breech bolt, when the bolt completes its closing movement. The invention is shown applied to a Browning gun adapted for firing small-calibre ammunition by the provision of a movable cartridge chamber 30 as described in Specification 461,346. The rocker 42 is the usual member provided on the breech bolt for depressing the extracted cartridge in vertical guides on the front of the breech bolt during reciprocation of the bolt. For this purpose, the depressor engages a cam on the top cover and is provided with a spring-pressed pin 43 for engagement with an incline 39 on a fixed depressor cam 33. A further fixed cam serves to return the depressor to the position shown in Fig. 1 when the breech closes in which position the depressor presses on a cartridge in the belt under the action of a spring 50. The depressor cam is provided with a second incline 38 formed by a slot 37 to actuate the depressor in the event of a defective cartridge producing a shortened rearward movement of the bolt. The breech bolt carries pivoted spring-pressed extractors 75, 76, Fig. 6 for engaging a cartridge in the belt and completing the extraction during recoil of the bolt, the extractors extending vertically to form guides 80, 81 for the rims of the live cartridge and the empty case when they are moved downwardly by the depressor. The Specification as open to inspection under Sect. 91 also describes means for limiting the belt feed to one small-calibre cartridge during the normal reciprocation of the pawl 60, Fig. 3, on the belt-feed slide 64. For this purpose, the pawl engages a fixed cam surface x to raise the pawl from the belt during movement of the slide to the left and ensure its return into engagement with the cartridge to be fed during the movement of the slide to the right. The slide is reciprocated by the arm 66 of a lever the other arm of which engages a cam groove in the top of the breech block. This subject-matter does not appear in the Specification as accepted.
Patent GB-315215-A (GB)
Title: Improvements in connection with mushroom spores
IPC: A01G1/04
Filed: 1929-06-11
Abstract: 315,215. Alilaire, E. July 9, 1928, [Convention date]. Mushrooms, cultivating.-To obtain a mixture of mushroom spores with inert powder for sowing, the mushrooms are gathered when the spores mature and are allowed to dry, being then ground, screened, mixed with previously detached spores, and triturated with the inert powder in grinders, mixers, &c. The inert powder may consist of wood flour, oil cake, or infusorial earth. Phosphates, nitrates, salts of ammonium or magnesium or other nutrient salts may be added. The mixture may be sown by hand, by blowers, or by aircraft.
Patent GB-716967-A (GB)
Title: Improvements in rotary electric switches
Inventor: OSBORN FRANK WILLIAM
IPC: H01H19/11
Filed: 1951-07-28
Abstract: 716,967. Multi-position switches. SIMPLEX ELECTRIC CO., Ltd. July 25, 1952 [July 28, 1951], No. 17922/51. Class 38(5) In a rotary switch having spring-loaded mechanism to locate it in any one of a plurality of switching positions, the spring means of the said mechanism is centrally accommodated within the hollow interior of a contact-operating cam or a bush forming a bearing for the switch operating spindle, whereby the dimensions of the switch casing are kept to a minimum. The switch comprises an insulating casing 10 housing contactcarrying springs 18, 19 spaced one above the other, and a contact-carrying spring 23 on a level with the spring 18. The springs 18. 19, 23 co-operate respectively with fixed contacts 26, 27, 28, upper springs 18, 23 being operated by an eccentric 36 of a hollow insulating cam 34 and lower spring 19 by an eccentric 35 of the cam. The cam 34 is driven by a spindle 38 through a plate 44 cooperating with a flat 46 on the spindle and with internal cam ribs 45, the peaks of the eccentrics 35, 36 having grooves 37 spaced at 90 degrees receiving convex surfaces 33 of the springs 18, 19, 23 in each of the four switch positions. To locate the switch in each of these positions a plate 48 carrying balls 49 and rotated by. but axially slidable within, the cam 34, is urged by a spring 47 accommodated within the cam. so that the balls cooperate with four 90 degrees displaced radially disposed recesses of a plate 50 fixed to the switch cover 11. The switch is secured to a panel 15 by a threaded bush 12 and nut 14, a circlip 43 on the spindle 38 forming a bearing therefor by engaging a shoulder 42 of the bush 12. In an alternative construction the spring 47 is housed in the bush 12, other components of the locating mechanism being suitably modified.
Patent GB-1248114-A (GB)
Title: Improvements in or relating to polymers
IPC: C08G73/06
Filed: 1969-04-08
Abstract: 1,248,114. Coated wire. DYNAMIT NOBEL A.G. 8 April, 1969 [6 April, 1968], No. 17948/69. Heading B2E. [Also in Division C3] Poly-(arylene-triketoimidazolidines) having repeating units of formula: where Ar and Ar<SP>1</SP> are the same or different arylene groups e.g. p-phenylene, diphenylmethane-4, 4<SP>1</SP>-, diphenyl-methane-3, 3<SP>1</SP>-, naphthalene-1, 5-, tolylene-2, 4- or tolylene-2, 6, are used as wire enamels in association with volatile solvents and polyesters. In an example copper wire is coated with an enamel containing one of the polymers and a polyester containing residues of terephthalic acid, glycerol and ethylene glycol, together with cresol, xylene, monoethyl ether of ethylene glycol and polybutyl titanate.
Patent GB-423097-A (GB)
Title: Improvements in pavement kerbs
IPC: E01F9/053
Filed: 1933-06-24
Abstract: 423,097. Road-kerbs; blocks. UNIVERSAL RUBBER PAVIORS, Ltd., and GAISMAN, L., Canning Street, Audenshaw, Manchester. June 24, 1933, No. 18050. [Classes 87 (i) and 107] Blocks for kerbing comprise a base d, of concrete, brick, or like material, and a corner cap a of rubber permanently attached there to, the cap forming the outer face of the kerb adjacent the road and its top being flush with and forming a part of the pavement. Tc render the kerb easily distinguishable, the caps may be yellow, amber, white, or any other suitable colour or combinations of colours. The caps have an undersurface of harder rubber than the exposed surfaces and are keyed to the bases by circular dovetail projections c also of hard rubber. In one method of making a unit having a concrete base, the cap is first moulded and vulcanized and then placed into a mould for the remaining part of the block. In an alternative method, the base is first moulded and a rubber cap is then vulcanized on to it. Specifications 194,618, 198,618, 211,321, 214,433, 235,938, 247,009, [all in Class 87 (i)], and 377,269, [Group V], are referred to.