baber/WOPTO huggingface dataset:
Patent GB-875958-A (GB)
Title: Improvements relating to control systems for electric motors
Inventor: WEST RICHARD ALFRED
IPC: B66C13/30
Filed: 1957-01-30
Abstract: 875,958. Control of two A.C. motors. CONTACTOR SWITCHGEAR Ltd. Jan. 17, 1958 [Jan. 30, 1957], No. 3206/57. Class 38 (3). Induction motors M1, M2 are operated in mutual synchronism by interconnecting their rotor windings which are also connected to a common control resistance. A number of contactor switches Cr are successively closed to reduce the rotor resistance as the motors accelerate, and these switches may be automatically controlled by timing relays. When the speed reaches a predetermined value, at which there is still sufficient slip to ensure that a powerful synchronizing torque is still available, one of the speed-responsive relays P is operated to open all the switches Cr as well as a star-point switch Cs. This removes the driving torque, but the synchronizing connections are maintained. If the speed still tends to increase, another speed-responsive relay P is actuated to operate reversing contactors C, C1, and to re-close switch Cs whereby reverse-current braking is provided. Alternatively, a speedresponsive relay may operate a warning device to indicate the need for reverse-current braking to the operator. If this warning is ignored, a further speed-responsive relay is operated to apply the electro-mechanical brakes B. Reversecurrent braking may be used for bringing the load to rest during normal operation, a speedresponsive relay being used to open switch Cb and to apply the brakes B when the speed has been reduced to a low value. If the load becomes misaligned, as in the case of a travelling crane, the motor M1 is isolated by switch S, the motor M2 being operated independently to correct the misalignment. The relays P may be supplied from a tachometer generator, or, as shown, they may be energized in accordance with the rotor voltage of the motors. The speed-responsive relays may be replaced by centrifugal switches.
Patent GB-872159-A (GB)
Title: Improvements relating to heat exchange systems in distillation plants
Inventor: FARR LESLIE JOHN
IPC: B01D3/42
Filed: 1959-01-29
Abstract: A heat exchange system for regulating the <PICT:0872159/III/1> <PICT:0872159/III/2> temperature of feeds to, or residues from, plants for the distillation of tar and crude petroleum comprises a heat exchanger 2 (Fig. 1) having a crude feed supply inlet 5 and outlet 6 and an inlet 3 and outlet 4 for hot residue from a distillation plant (not shown), part of the residue being recirculated through the heat exchanger by means of a line 8 and pump 9 and the volume of the part recirculated being controlled by a valve 10 actuated by a temperature control unit 11, the unit being responsive to temperature changes of a bulb 12 located in the residue outlet. Alternatively, the volume recirculated may be varied according to the temperature of the crude feed outlet.  Instead of recirculating directly to the heat exchanger, recirculation may be indirect by first returning part of the residue to the inlet of the distillation unit, e.g. in the tar distillation plant of Fig. 2. Pitch from a distillation column 21 is circulated through conduits 22, 23, vapours from the column leave by a conduit 26 and crude tar is fed to the column through the conduits 5, 6 of a heat exchanger 2. The tar is partially distilled and pitch is pumped from the base of the column to a well 29, whence part leaves the column through a conduit 3 and a valve 30 while the remainder mixes with crude tar entering by the conduit 6.  Pitch passes downwardly through the heat exchanger, part being recirculated to the column by a conduit 8 below the level of the conduit 6 and part being discharged by a conduit 7 at a level above the heat exchanger 2 to provide a normal overflow through the conduit 8.  A level controller 31 regulates the flow of pitch through the valve 30.  Two heat exchangers in series may be employed in both Figures.  Specification 472,541 is referred to.
Patent GB-387125-A (GB)
Title: Improvements in or relating to waterproof fabrics and the production thereof
IPC: D06M15/41
Filed: 1932-02-03
Abstract: Semi-rubbery phenolic resinoids are prepared by reacting fatty oils such as tung oil or unsaturated fatty acids with phenols, diphenols, or polyphenols such as phenol, xylenol and resorcinol in the presence of metallic salts, e.g. iron chloride, inorganic acids, e.g. phosphoric acid and sulphuric acid, organic acids, e.g. oxalic acid, natural resins, e.g. rosin, or organic liquids, e.g. triethyl citrate, and then reacting the complex formed, if desired in the presence of free oils or phenols, with aldehydic compounds such as formaldehyde, benzaldehyde, furfuraldehyde, salicylaldehyde, starches and sugars or hexamethylenetetramine. Inert fillers, e.g. whiting, corn starch, barytes, wood flour and powdered asbestos or reactive fillers, e.g. zinc, magnesium, lead or aluminium oxides, are added to the resinoid which is then milled first on hot rolls and then on cold rolls.  The reactive fillers are stated to combine chemically with uncombined phenol or oil.
Patent GB-1116892-A (GB)
Title: Two-tier storage apparatus
Inventor: SCHOFIELD GEORGE
IPC: B65G1/04
Filed: 1966-01-25
Abstract: 1,116,892. Storage apparatus. A. G. WILD & CO. Ltd. 27 Feb., 1967 [25 Jan., 1966], No. 3247/66. Heading B8E. Storage apparatus for elongated articles such as long steel bars or tubes comprises a series of elongated static storage compartments 5, Fig. 1, and a number of elongated storage compartments 1, 3 arranged above and parallel to the compartments 5 and horizontally movable relative thereto in a transverse direction, the total width of the compartments 1, 3 being less than that of the compartments 5 by an amount not less than the width of the widest of the latter. The compartments 1, 3 have rollers 2 which run on rails 4 on the compartments 5. A motor 7 drives the compartment 3 through an elongated shaft 13, Fig. 4, worms 15, gears 16 and lead screws 8, the compartment 3 having nuts 18 engaging the screws 8. Alternatively the latter may be driven by individual motors. The compartments 1, 3 may be coupled together by one or more sliding blots 6 operated manually or electrically, e.g. using a solenoid, or by a coupling which automatically engages when the compartments approach one another, manual or electrical power being used to disengage the coupling. The compartments 1, 3 are also supported on intermediate rollers 12, Fig. 4, mounted on the compartments 5 and engaging tracks 11 on the compartments 1, 3. In operation the apparatus is serviced by an overhead crane and the compartments 1, 3 are moved to provide access to the compartments 5. The compartments 1, 3 may be moved by an hydraulic ram instead of the motor 7. There may be more than two rows of compartments,
Patent GB-747557-A (GB)
Title: Improvements in or relating to the production of welded tubes
IPC: B21C37/08
Filed: 1953-02-05
Abstract: 747,557. Making tubes. RHEINISCHE ROHRENWERKE AKT.-GES. Feb. 5, 1953 [Feb. 5, 1952], No. 3279/53. Class 83 (2). In the manufacture of tubes having longitudinal butt-welded seams, strip iron is skelped to form a slotted tube whose edges are then heated electrically and pressed together by rollers to weld the seam, the welded tube is then reduced in diameter or in both diameter and wall thickness in a reducing mill or a stretchreducing mill and is then further reduced in diameter and wall thickness in a second stretch reducing mill. Flat strip is drawn from a coil 1, Fig. 6, through a straightening device 2, flash welder 3 for butt-welding together the ends of successive coils, and burr removing device 4, by a driving device 5 from which the skelp passes in variable loops 6, 11 to a driving means 12 which conveys it through a gas furnace 21 to a rolling mill 17, for forming the slotted tube, and then to a welding-machine 18 where the edges are heated by resistance or induction heating and pressed together. The welded tube then passes through a second gas furnace 22 to a stretch reducing mill 8 after which it is cut into lengths by a flying saw 9 and passed to a tube store 10. From the latter the tubes pass through a further stretch reducing mill 13 to a tube store 15. The continuous tube may alternatively pass directly from the mill 8 to the mill 13 and be cut into lengths by a flying saw 14. In another embodiment, Fig. 4, four tube forming and welding plants 17, 18 feed the tubes, cut off into lengths by flying saws 9, to a central tube store where the ends of opposed tubes are welded together by machines 19. The tubes are drawn from the store by a driving device 12 and pass through a gas furnace 7 to the two stretch-reducing mills 8, 13. In a modification of the plant of Fig. 4, the four tube forming and welding plants are disposed at one end only of the tube store and on opposite sides of the furnace 7, Fig. 5 (not shown).
Patent GB-366713-A (GB)
Title: Improvements in, or relating to, hair waving appliances
IPC: A45D2/42
Filed: 1931-02-02
Abstract: 366,713. Hair - waving appliances ; combs. HOLMAN, E., 310, High Road, Balham, and HARDY, A. G., 32, Gayton Road, Hampstead, both in London. Feb. 2, 1931, No. 3307. [Class 131.] Hair waving devices are provided with a combustion chamber in which is burnt a rod of slow combustible, e.g. carbon and saltpetre. As shown in Fig. 1, a tube a adapted to receive a support on which a tress of hair is wound is provided with a slidable sleeve b carrying combustion chambers b<2>, the chambers b<2> being fitted with holders c provided with sockets d for the combustible e. The chambers b2 are provided with air inlet apertures f near the bottom and with outlets at the top. In the modification shown in Fig. 4, a combustion chamber l is detachably or rigidly secured to a comb k which is adapted to be used in conjunction with a second comb r, the comb k being provided with bent-over portions t, t<1> to receive the teeth of the second comb. In use, the comb k is placed under the waved tress and the comb r slipped thereover in such a manner that the crest of the wave occurs adjacent the base of the teeth of the two combs. The chamber l may be provided with an external curved guard to prevent ash from falling on the hair.
Patent GB-607404-A (GB)
Title: Improvements relating to the application of metal coatings to metal surfaces
IPC: C23C4/02
Filed: 1946-02-01
Abstract: Metal articles are given a phosphate layer to serve as a bond for a sprayed metallic coating.  In the process of thus coating ferrous articles (a) with zinc or zinc alloys, the article is treated with a phosphating solution of phosphate of zinc, or manganese, or of iron and manganese, dried, and the zinc or zinc alloy then sprayed on; (b) with aluminium or its alloys, the phosphating solution comprises phosphates of manganese or of iron and manganese, and the article is heated to 200-250 DEG C. to produce a colour change in the phosphate layer before spraying on the metal.  In the latter case the phosphated article may be treated with an aqueous solution containing hexavalent chromium or sodium nitrite which allows the spraying to be delayed without deterioration of the phosphate layer.  Aluminium alloys, e.g. "Duralumin" (R.T.M.) may be similarly treated with an appropriate phosphating solution and sprayed with aluminium or aluminium alloy.  Specifications 346,401, 466,662 and 494,503 are referred to.
Patent GB-864196-A (GB)
Title: Improvements in or relating to lead castings
Inventor: SWANSON COLIN JOHN
IPC: C22C11/00
Filed: 1959-01-30
Abstract: A method of reducing the shrinkage porosity and improving the surface quality of lead castings, such as used for radiation shield lead bricks, comprises the addition of arsenic (e.g. in form of a master lead-arsenic alloy) to the lead being cast.  In the casting, the arsenic may be present in proportions between 0.6% and 1.4% by weight.  The addition of 1% arsenic reduces the ductility, but increases the tensile strength and hardness of the lead.
Patent GB-247210-A (GB)
Title: Improved process for the manufacture and production of agglomerated combustible products
IPC: C10L5/14
Filed: 1926-02-05
Abstract: 247,210. Goutal, E., and Hennebutte, H. Feb. 9, 1925, [Convention date]. Materials and composition for making coke.- A combustible product having a great resistance to disintegration is obtained by carbonizing below 700‹ C. a mixture of materials which shrink on carbonization, such as semi-cokes and charcoal calcined at low temperature, with those showing little shrinkage, e.g. cokes and carbon from peanut shells, in the presence of the pyroligneous tar and pitch products described in Specifications 231,863 and 241,899. 20-70 parts of lignite coke or of charcoal carbonized above 800' C. are mixed with 80-30 parts of charcoal calcined below 550‹ C., and the mixture is agglomerated with 30 per cent of a tar pitch extracted from pyroligneous liquid and carbonized at 600' C. The product may be used for absorption and catalytic purposes.
Patent GB-575521-A (GB)
Title: An improved packing block for workshop purposes
IPC: B25H7/00
Filed: 1944-02-23
Abstract: 575,521. Work holders. PERKINS, A. J. Feb. 23, 1944, No. 3372. [Class 83 (iii)] An adjustable packing-block comprises a base a adapted to be bolted to a work-bench, a work-supporting platform f having a depending stem e screwed at its lower end to engage the screw-threaded lower end of a sleeve c integral with the base and a member g freely mounted around the sleeve c and urged by a spring i into frictional engagement with the undersurface of the platform f. In operation, the member g which is knurled on the outside is turned by hand and frictionally rotates the platform which is raised until it contacts the work to be supported, after which the member g rotates idly. The periphery of the platform is notched at k so that it can be turned back by hand to an inoperative position.
Patent GB-990985-A (GB)
Title: Improvements in or relating to centrifugals
Inventor: GOODWIN RALPH CLEVELAND
IPC: B04B7/02
Filed: 1962-01-30
Abstract: 990,985. Centrifugal strainer separators. WESTERN STATES MACHINE CO. Jan. 30, 1962, No. 3447/62. Heading B1D. In a centrifugal strainer separator having a basket 33 which is mounted for rotation within a fixed curb structure, 22, 25, and which has an opening between spider arms 37 for discharge of solids, the basket is rotatably mounted on a basket support structure 60 which extends across the curb structure at a level below the basket, and which is cut away at at least one side under the basket bottom for gravity discharge of solids from spider 37; also the basket support structure is itself supported by three links (only one, 87, shown) suspended exteriorly of the curb structure and permitting movement of the separator relative to the curb structure whenever there is unbalanced loading of the basket. Preferably, the basket is driven by a hydraulic positive-displacement motor 55. Specification 990,984 is referred to.
Patent GB-546550-A (GB)
Title: Improvements in or relating to gaseous electric glow discharge thermal switches
IPC: H05B41/08
Filed: 1941-03-14
Abstract: 546,550. Thermal switches. SHEPHERD, G. R. (Westinghouse Electric International Co.). March 14, 1941, No. 3506. [Class 38 (v)] [Also in Group XIII] In a thermally - operated gaseous electric glow-discharge switch specially adapted for initiating the operation of discharge lamps, the bimetallic strip 18 is U shaped and, when heated by a discharge between its free end 20 and an electrode 22, bends so that its ends approach each other and a conductor on the end 20 engages the electrode 22. The bimetallic strip is spaced the requisite distance from the electrode 22 by assembling it approximately in position and then placing the bulb in a combined exhaust and heat treating machine' where it is subjected to a temperature of say 425‹C. for 1¢ minutes. This heat treatment moves the end 20 into engagement with electrode 22 and then deforms the bimetallic element so that on cooling it moves back a standard distance. The bimetallic electrode may have a coating of electron emitting material such as the oxides of barium and strontium or it may be coated with magnesium or zinc and may also support by means of projections 23 a U-shaped ribbon 26 of magnesium. The bulb may contain neon, helium or argon at suitable pressure. The bimetallic strip may be of nickel and molybdenum, or of nickel steel with 36 per cent. nickel and chromium nickel steel.
Patent GB-1408533-A (GB)
Title: Remote meter read-out apparatus
IPC: G01F15/06
Filed: 1973-01-24
Abstract: 1408533 Remote meter reading apparatus ROCKWELL INTERNATIONAL CORP 24 Jan 1973 3520/73 Heading H3H In a remote meter reading system, each stage of the meter is associated with a set of resistors, one resistor for each value. The meter is read by making the meter resistor one arm of a D.C. fed bridge and increasing the value of another arm stepwise until the output polarity changes-the number of steps being counted. As described, the four stages of a meter are associated in pairs with two sets of resistors, each stage having a drum with contacts which selects the resistor from the associated board corresponding to its position. Three output lines 58, 59, 60 are connected by steering diodes to the board and to a socket into which the reading device can be plugged. Meter identification is also available on 6 lines to the socket. The three output lines 58-60 correspond to lines 180-182 in the corresponding plug and the desired stage is selected by relays RY1 and RY2. The meter reading system comprises a Wheatstone resistance bridge with D.C. input between 191 and 190, output at between 193 and 194 and arms comprising fixed resistors 196, fixed resistor 197, the resistance of a meter stage and one of the resistances in leads 201 to 212 which are sequentially selected by a scanning contact 199. The sequence of operations is controlled by counter 342 which is stepped by a pulse generated from switch 330 each time scanner 199 has scanned all the resistances. The counter 342 has seven positions: two reset positions in which the output display is reset, four read positions, one for each stage, and a turn-off position. The display is provided on 12 position wheels (0-9, N and Z) and the wheel position sends a signal on 1 of 10 lines to a recording device. N and Z represent void data, Z being also the initial reset position. In operation to read out the meter values, counter 342 is stepped to an output of ABC = 010. This disenables relays RY1 and RY2 through logic circuitry and connects pulse generator 260 via gate 259 to the least significant digit display. Pulses from generator 260 actuate coil 274 which steps scanner 199 from lead 201 to 202. Transistor 250 is on while the voltage at 193 is higher than that at 194 and this condition prevails until the resistor in lead 202-212 selected is greater than the resistance at the meter when transistor 250 switches off, disenabling gate 259 and stopping the flow of pulses to the digit display. The number of pulses sent to the display is the same as the number of steps made by the scanner until the bridge output polarity changes. Scanner 199 continues to step and when it leaves step 212, it actuates switch 330 and steps counter 342 selecting the next combination of relays and the next meter and display stage. The process is then repeated for the other stages.
Patent GB-306394-A (GB)
Title: Fire-bridge
IPC: F23M3/00
Filed: 1929-02-02
Abstract: 306,394. Rolfs Kohlen - Oxyd - Verbrenner Ges. Feb. 18, 1928, [Convention date] . Firebridges formed with passages for the introduction into the furnace of preheated secondary air have these passages helically twisted about their longitudinal axes so that the air is given a whirling motion. The firebridge comprises a hollow casting 3 and the passages are formed by partitions 13 helically twisted, the openings of the passages at the base of the bridge being slots 15 parallel with the grate bars 2 while the outlet slots 16 at the upper end of the bridge are inclined as shown in plan in Fig. 2. The partitions 13 may be replaced by ribs extending inwardly and interengaging. External ribs 4, 5 are formed on the rear and front faces of the bridge and the front face is protected by fireproof material 6. Fig. 2 shows two groups of passages twisted in opposite directions; more than two groups may be provided and may have helices of different pitches. The support 7 for the firebridge has an opening 8 controlled by a damper 12 operated from the front of the furnace by a handle 11.
Patent GB-348137-A (GB)
Title: Improvements in and relating to loose-leaf ledgers and the like
IPC: B42F13/12
Filed: 1930-02-04
Abstract: 348,137. Loose-leaf binders. DEELEY, R. M., Arden, The Grove, Isleworth, Middlesex. Feb. 4, 1930, No. 3741. [Class 146 (i).] In a loose-leaf binder of the kind having one or more screw-threaded fitments attached to the back of the cover and adapted to receive a permanent binding screw or the screwed end of a temporary filing-post, a flexible backing d is provided, the ends of which are fixed between the flaps b<1> of the cover b and the sheets e. The temporary filing-posts t, having flat portions t<2>, screw into the fitments a, which are formed with a fixed flange a<1> and a loose flange a2, the latter being riveted over when the fitment is in place. The backing d and the sheets e are passed over the posts t and, when the ledger is full, the posts t are removed and permanent binding screws s are inserted, each screw being sufficiently long to extend beyond the fitment, whereby it may be riveted over. The end of the screws may be formed with holes or recesses s<2> to facilitate this, and a seal may be applied to the riveted part.
Patent GB-175521-A (GB)
Title: Improvements in pruning shears
IPC: A01G3/02
Filed: 1921-02-01
Abstract: 175,521. Jardine, C. A. Feb. 1, 1921. Hand shears; horticultural knives.-Pruning- shears having a detachable convex edged cutting- blade D co-operating with a concave guard E have an auxiliary cutting-knife F attached by welding, rivets, or screws to the gua.rd. The knife is used to obtain a clean close cut after the shears have been used. The shears are provided with hand grips H and a finger support h, and the coiled spring G fitted between the handles A, B is carried by the handle B and has a roller g at its end engaging a plate b fixed to the handle A. A locking-clip and spring J is used to keep the handles together when not in use or when the knife F is being used. The pivot C is formed with a circular part engaging the handle A and blade D and a square part engaging the guard E.
Patent GB-561581-A (GB)
Title: Improvements in or relating to road tanks
IPC: B60P3/22
Filed: 1943-03-10
Abstract: 561,581. Tank vehicles. DEWHIRST, S. A. March 10, 1943, No. 3884. [Class 108 (i)] The tank, Fig. 1, is supported at each end by a pair of links 5, inclined from the lower end upwardly and inwardly and pivoted at their lower ends to a tank support 2 and at their upper ends to a channel-shaped member 3 mounted on the chassis 4. A central tank support is pivoted about a vertical axis. In the construction shown in Fig. 2, the similarly inclined links 5 are pivoted to tank supports 2 at their upper ends and at their lower ends to members 3<1> mounted on the chassis.