baber/WOPTO huggingface dataset:
Patent GB-1154141-A (GB)
Title: Improvements in and relating to Electro-Motive Apparatus.
Inventor: SHIRE EDWARD SAMUEL
IPC: G05D3/18
Filed: 1966-01-10
Abstract: 1,154,141. Control of stepping motors. NATIONAL RESEARCH DEVELOPMENT CORP. 9 Jan., 1967 [10 Jan., 1966], No. 1131/66. Heading H2J. A servo system comprises a stepping motor 13 and has error indicator 23 whose output represents the magnitude and sense of a difference in the angular positions of shafts 21, 24. Signals from a device 17, which detects the angular position of rotor 11, are combined with signals from the indicator 23 whereby field coils 14, 15, 16, are energized in sequence to turn the rotor in a direction tending to reduce the error. A signal from branch A of the detector 17 is amplified, rectified, and the resultant pulses are then fed to a bi-stable device 34 producing signals of opposite sign which tend to drive the rotor in one direction or the other. A servo amplifier 35 receives the error signal from the indicator 23 and is also connected to a sawtooth generator 36, the outputs on leads 47, 46, representing the sum and difference respectively of the error and sawtooth signals. These resultant signals are fed through resistors 37, 38, to diodes 39, 40, which also receive the signals from the device 34. The combined signals are isolated by the diodes, amplified, and then applied to trigger circuit 44 having a constant output when its input exceeds a given level, but providing no output below that level. During time intervals when the circuit 44 is effective, amplifier 18 energizes the field coil 14. The operation of branches B, C, of the detector 17 and similar to that of the branch A. When the sense of the servo error signal changes, the signals on lines 46, 47, are interchanged to reverse the motor. As the error signal increases in magnitude, the duration of the pulses passed by the trigger circuit 44 is increased. In a modification, the generator 36 may be replaced by a sine wave generator. The detector 17 may comprise a metal disc which is mounted on shaft 12 and has an asymmetric shape with regard to its axis of rotation. High frequency currents are produced in the disc by means of a fixed ring which is supplied from a H.F. source and is capacitively coupled with the disc. As the disc is rotated, pulses are cyclically induced in metal strips which are circumferentially spaced around the axis of rotation. In an alternative form of detector 17, the shaft 12 carries a flat ring which is divided into magnetic and non-magnetic parts. Iron cores carrying coils are spaced symmetrically around the ring, each core having a central coil which is fed with alternating-current, and two outer coils which are connected in opposition.
Patent GB-1417242-A (GB)
Title: Regenerative apparatus for drying a gas -air-
IPC: F24F1/02
Filed: 1973-01-09
Abstract: 1417242 Air drying units CARL MUNTERS AB 9 Jan 1973 [10 Jan 1972] 1139/73 Heading F4V A rotary drier has a flow of air to be dried driven by fan 38 in the direction of the arrows and leaving the drier at 74. At the same time that portion of the rotor below the box 66 is regenerated by a stream of air from fan 40 which passes through the central column of the rotor, is heated by elements 64 with the central duct and passes down through the channels of the drier to exit at 70 and 80.
Patent GB-538132-A (GB)
Title: Improvements in multiple grip vices or jigs
IPC: B23Q3/06
Filed: 1940-01-20
Abstract: 538,132. Vices. VINCENT, P. C., and VINCENT, H. R. D. CO., Ltd. Jan. 20, 1940, No. 1257. [Class 61 (ii)] A vice of the kind comprising a number of pairs of jaws in a row for gripping a number of similar work pieces as in a milling &c. machine has an abutment such as the rounded end 21 of an adjustable screw 20 between the end pair of jaws 13 and the end wall 17 of the housing permitting or causing tilting of the end jaws so that when gripping short-pieces of work 23, Fig. 5, and employing filling pieces 24 which may not be of exact size the tilting which takes place when the jaws are clamped by the clamping screw 18 is in opposite directions on each side of the middle pairs of jaws whereby with the same tolerances as before the maximum tilting of any of the jaws is halved and the chance of binding in the grooved housing is avoided. The screw 20 is nearer one end of the end wall 17 and the latter may be inverted when the jaws tilt the other way due to the filling pieces being smaller than the work pieces 23. The abutment may be on a separate plate between the end jaw and end wall or on the jaw.
Patent GB-1077031-A (GB)
Title: A process for the production of isocyanates
Inventor: KRIMM HEINRICH
Filed: 1966-01-11
Abstract: Isocyanates are prepared by reacting a primary amine, or an acid addition salt thereof, with at least a stoichiometric quantity of phosgene in the presence of a quantity of a tertiary amine sufficient to combine with the HCl formed during the reaction, and with any other acid which may be liberated.  A large number of mono- and poly-amines are specified as starting materials.  N,N-Dimethyl- and N,N-diethyl aniline are preferred tertiary amines.  The reaction is usually effected at -10 DEG  to 30 DEG  C., but temperatures as high as 150 DEG  C. may be employed.  Examples relate to the preparation of bis-(4-isocyanatophenyl)-dimethyl methane, p-phenylene diisocyanate, cyclohexylisocyanate, ethyl isocyanate, hexamethylene diisocyanate, 1,4-butylene-bis-isocyanato-isopropyl ether, p-chlorophenylisocyanate, naphthalene - 2,7 - di - isocyanate, isopropylidene - 2,4,41 - triisocyanato - dibenzene and diphenylsulphide-4,41-diisocyanate.
Patent GB-201878-A (GB)
Title: Improvements in water-tube boilers
IPC: F22B17/12
Filed: 1923-01-15
Abstract: 201,878. Bigelow Co., (Assignees of Barnum, S. H., and Soren, T. H.). Aug. 4, 1922, [Convention date]. Water-tube boilers. - A water-tube boiler is fitted with a feed-heater having an inlet at one end and an outlet connected to the boiler below the water level at the other end. In a boiler having front and rear units 10, 11 each consisting of upper and lower drums connected by straight parallel tubes, the feed-heating units 26 are similar in construction to the boiler units and are each connected to the rear upper boiler drums by pipes 31. Baffles 32, 33 direct the gases in a sinuous course through the tubes of the feed heater. Baffles 17, 35 between the boiler and feedheating units direct the gases through the tubes in thin streams. In a modification, a second row of feed-heating units is arranged behind the units shown. The baffles 32, 33 may be dispensed with.
Patent GB-645829-A (GB)
Title: Process and device to produce eccentric and non-circular profiles
IPC: B23Q27/00
Filed: 1947-01-15
Abstract: 645,829. Generating non-circular profiles. POSIWAL, J. Jan. 15, 1947, Nos. 1400 and 1401. Convention dates, Jan. 15, 1946 and Feb. 25, 1946. [Class 83 (iii)] [Also in Group XXIII] In a method of producing non-circular profiles the work is rotated at a uniform angular speed while the path of movement of the tool, which contacts the work in a perpendicular to the profile, is a cycloid symmetrical about two axes. The cycloidal movement of the tool is produced by the mechanism shown in Figs. 5 and 6. A gear 1 driven through a train 25 ... 27 from a motor 24 drives a hollow shaft 2 integral with a lever H1 which carries gears R2, R3 mounted on a common shaft journalled in the lever. The gear R2 meshes with a stationary gear R1 thereby driving a gear R4 which through ball joints and a telescopic shaft 3 rotates a shaft 02 rigid with a slide carrier 8 the slide of which is provided with a pin 11. The shaft 02 is journalled in a second slide 5 adjustable in a carrier 4 so that the eccentricity of the shaft 02 with respect to the axis of the gear-wheel R4 may be varied while the eccentricity of the pin 11 with respect to the shaft 02 may be similarly varied. Both slides are spring-biassed and adjustment is effected by means of eccentrics 13, 14 mounted on a shaft 12. These eccentrics are withdrawn from operative position after adjustment has been effected. The pin 11 carries an anti-friction bearing 41a which is secured to a body 41 free to follow the path of the pin on horizontal and vertical guides 17, 18 which are integral with each other and supported by anti-friction bearings 19, 20. The body carries an external grinding wheel 28 or an internal grinding wheel 29 and a cutting tool 38, the latter being brought into operative position by rotation of the body about a pivot 33. The latter is secured to a base 34 adjustable transversely of the bed 35, Fig. 7, of the machine by means of a lead screw 37. The headstock 44 and the tailstock 55a are mounted on a slide 49 which is traversed longitudinally on the bed 35 by mechanical or hydraulic means in a known manner. Reversal of the slide is also effected in known manner by a lever 50 and adjustable stops 51, 51a while the speed of traverse is governed by a Norton-type gear-box 54. The slide can be hand traversed by a rack and pinion. A motor 48 run in synchronism with the motor 24 drives the headstock.
Patent GB-157749-A (GB)
Title: Process for the manufacture of pieces of any desired size or shape of tungsten or molybdenum carbide or of a mixture of these carbides for tools and articles of all kinds
IPC: C22C1/05
Filed: 1921-01-10
Abstract: In the production of tools and other articles of tungsten or molydenum carbides or mixtures of them, as described in the parent Specification, the powdered carbide is moulded in iron moulds, and the heating to near the melting-point is effected in a reducing atmosphere.
Patent GB-551209-A (GB)
Title: Rectifying contact detector systems for very short electric waves
IPC: H01Q13/18
Filed: 1941-02-04
Abstract: 551,209. Wireless receiving apparatus. STANDARD TELEPHONES & CABLES, Ltd. (Westem Electric Co., Inc.). Feb. 4, 1941, No. 1452. [Classes 40 (iii) and 40 (v)] An ultra short wave crystal detector comprises a body of silicon of parity in excess of 98 per cent having one highly polished surface which is plated so as to form intimate contact over a large area with a conductor on which it is mounted. Fig. 1 shows a super heterodyne receiver embodying the invention, and comprising a metallic wave receiving chamber 1 having a front aperture formed by an iris diaphragm 16. Projecting through the rear wall of the chamber is a pair of semi-circular Lecher conductors 2 of a highly conducting alloy mounted in a member 24 which is slidably adjustable by means of a spindle 26 and bell-crank 23 for tuning purposes. A lens 42 of a suitable wax serves to concentrate in the chamber 1 both the incoming signal waves and waves from a local beat oscillator 3. The separation between the Lecher pair 2 and chamber 1 is such as to constitute a short circuit for the signal frequency but not for the intermediate frequency, which is taken by leads 5 from the inner ends of the Lecher pair to an I.F. amplifier 6, second detector 8 and A.F. amplifier 9. The first detector or mixer comprises a crystal 30, Figs. 3 and 4, mounted in a recess near the top of one of the Lecher conductors and co-operates with a wire 31 mounted in the other conductor. In a modification, the crystal and wire are contained in recesses in the ends of the conductors (Fig. 7, not shown). As shown in Fig. 3, the Lecher conductors 2 are separated by a strip of mica 17 and surrounded by a close-fitting dielectric sleeve 18 enclosed in a metal tube 19 joined to an insulating block 20 through which pass the leads to the subsequent stages. Also connected to block 20 is member 24 to which adjusting pressure is applied against the action of a spring 21, Fig. 1. The detector 30 comprises a machined block of silicon which is plated with silver or chromium where it is in contrast with its support. Also by means of using a reduced plating current it is stated that the active spots only of the working surface may be chromium plated so as to give permanent working spots which are easily located. The contact-wire 31 is of tungsten or a platinumiridium alloy and-may be tipped with an alloy of gold, silver and platinum. U.S.A. Specification 937,284 is referred to.
Patent GB-381049-A (GB)
Title: Improved method of electrolysis with the use of a mercury cathode
IPC: C25C7/02
Filed: 1932-01-18
Abstract: 381,049. Electrolysis. PALMAER, K. W., 60, Sturegatan, Stockholm. Jan. 18, 1932, No. 1463. Convention date, April 30, 1931. [Class 41.] In the electrodeposition of metals more electropositive than the alkali and alkaline earth metals, particularly metals of the eighth group such as iron, into a flowing mercury cathode, the support for the mercury is previously amalgamated. The support should consist of a plate of a metal only slightly soluble in mercury such as a metal of the eighth group or chromium or manganese or an alloy of such metals ; it may be vertical or inclined. Amalgamation is effected by rubbing with acid and mercury or by electrodeposition of mercury. Specifications 16358/02, 10219/06, and 318,149, [all in Class 41, Electrolysis], are referred to.
Patent GB-494326-A (GB)
Title: Anthraquinone derivatives and their manufacture
IPC: C09B1/40
Filed: 1937-01-18
Abstract: Nitroformylaminoanthraquinones are made by nitration of formylaminoanthraquinones.  The products may be reduced to aminoformylaminoanthraquinones and then hydrolysed to polyaminoanthraquinones, or hydrolysed to nitroaminoanthraquinones followed by reduction.  The reduction and hydrolysis may also be carried out simultaneously.  When two formylamino groups are present the anthraquinone can be mono- or di-nitrated, according to the amount of nitrating agent.  In examples: (1) 1.5-diformylaminoanthraquinone is dinitrated to 1,5-diformylamino4.8 - dinitroanthraquinone, which may be hydrolysed to 1.5-diamino-4.8-dinitroanthraquinone with sulphuric acid or caustic soda, followed by reduction to 1.4.5.8-tetraaminoanthraquinone, or reduced to 1.5-diformlyamino-4.8-diaminoanthraquinone, followed by hydrolysis with sulphuric acid; (2) 1,5-diformylaminoanthraquinone is mononitrated to 1.5 - diformylamino - 4 - nitroanthraquinone, hydrolysed and reduced, or reduced to 1.5-diformylamino - 4 - aminoanthraquinone; (3) 1.8 - diformylaminoanthraquinone is mononitrated to 1.8-diformylamino - 4 - nitroanthraquinone, which may be reduced, or hydrolysed and reduced; (4) 1-formylaminoanthraquinone is mononitrated to 1-formylamino - 4 - nitroanthraquinone, which may be hydrolysed or reduced, or hydrolysed and reduced simultaneously; (5) 1.5-diformylamino - 4.8 - dinitroanthraquinone is reduced and hydrolysed simultaneously.  Formylaminoanthraquinones may be obtained from aminoanthraquinones and formic acid or from halogenanthraquinones and formamide, according to Specification 494,320.
Patent GB-854970-A (GB)
Title: Improvements in or relating to picking mechanism for looms
Inventor: RAPP THEODORE FREDERICK
IPC: D03D49/38
Filed: 1957-01-17
Abstract: 854,970. Picking motions. HUYCK CORPORATION,[formerly HUYCK &SONS, F. C.]. Jan. 17, 1957, No. 1770/57. Class 142(2). [Also in Group XXIV]. The picking sticks of a wide loom are actuated by individual continuously-running motors, each driving a flywheel 56 through a belt 46. The picking strap 34 is attached at 120 to the driven element of an electromagnetic clutch mounted on the flywheel and is wound on to a surface 122 of increasing radius when the clutch is engaged under the control of timing switches ; the clutch is de-energised after a fraction of a revolution and the parts are returned to the position shown, in which a stop 124 on the clutch abuts a fixed stop 126, by a spring acting on the picking stick. The strength of the picking impulse can be adjusted by altering the speed of the flywheel, the time of de-energising the clutch, or the slip of the clutch, the last-mentioned being controlled by a rheostat in the magnet supply circuit. In one embodiment, a sequence of strong and weak picks is produced by a cam-operated switch which connects a shunt across the rheostat.
Patent GB-291753-A (GB)
Title: Improvements in bobbins and the like
IPC: B65H75/18
Filed: 1928-01-19
Abstract: 291,753. Tolzmann, G. June 8, 1927, [Convention date]. Thread-guides.-A bobbin which may serve as a braking reel or thread-guide comprises a body 1 formed of compressed resin with a filling material, e.g. sawdust, and a spindle 3.
Patent GB-325952-A (GB)
Title: Improvements in drums for cables, wire or the like
IPC: B65H75/14
Filed: 1929-01-19
Abstract: 325,952. Farmer, L., and Sewell, H. E. Jan. 19, 1929. Reels or bobbins.- In drums, reels, bobbins, or the like, for cables, wires, and other material, and of the type comprising a cylindrical barrel portion secured to the flanges by bolts, wires, &c. passing internally through slits or the like in the flanges, the ends a<1> of the bolts &c. are split for a suitable length and are turned outwardly at right-angles to secure the flanges to the cylindrical portion. The use together of two plain pins or rods renders the splitting operation unnecessary. Washers d may be provided.
Patent GB-310084-A (GB)
Title: Improvements in apparatus for throwing bombs and the like with ordinary firearms
IPC: F41C27/06
Filed: 1928-01-20
Abstract: 310,084. Madaschi, G. Jan. 20, 1928. Ordnance, muzzle-loading; pneumatic; warrocket; chambers; design; recoil, sound, and flash of discharge, modifying or obscuring.-Relates to muzzle attachments for rifles and other guns of the kind comprising a barrel e in alignment with the gun barrel i and one or more lateral barrels a of larger diameter for the discharge of bombs B by gases issuing in a forwardly inclined direction from the rear end of the barrel c when an ordinary shot is fired from the barrel i through the barrel e. According to the invention, a multiplicity of inclined holes m are provided for the passage of the gases from the near end of the barrel e to the rear end of the barrels a. The bombs may have tail stems n, which may contain rocket charges fired by fuzes ignited by the propellent gases. When the bombs leave the barrels a, the gases behind them are deflected by baffles hand directed rearwards through passages q, and discharged through chambers r and nozzles s. The chambers r may contain rolls of wire netting coated with asbestos or magnesite. The effect of this arrangement is to reduce recoil, conceal the flash, and deaden the sound of discharge.
Patent GB-496619-A (GB)
Title: Improvements in loudspeakers
IPC: H04R1/28
Filed: 1938-01-20
Abstract: 496,619. Loud-speakers. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAM. PENFABRIEKEN. Jan. 20, 1938, No. 1949. Convention date, Jan. 23, 1937. Drawings to Specification. [Class 40 (iv)] A loud-speaker is provided with a baffle in the form of a casing, part of whose walls allows air to pass, that part of the walls being provided with an acoustic resistance which has a value such that the ratio of the volume speed of the air adjacent the resistance to that of the air adjacent the diaphragm does not exceed 3 /2, volume speed being defined as the product of the speed of the air and the area through which it flows. The value of the acoustic resistance is also such that the peak in the response curve due to resonance of the speaker in the casing is not more than four decibels above the mean value at higher frequencies such as from 400 to 800 cycles per second. The resistance may be formed of one or more layers of flexible material such as fabric or thin paper supported on an apertured rigid plate-like body, the apertures occupying from 20 to 75 per cent of its surface. The resistance material used may have a resistance of from 30 to 150 mechanical ohms per square centimetre.
Patent GB-876816-A (GB)
Title: Improvements in or relating to packaging
Inventor: KILBURN MALCOLM ANGUS
IPC: B65D17/00
Filed: 1959-01-21
Abstract: 876,816. Cartons ; containers opened by tearing ; packaging. COAL INDUSTRY (PATENTS) Ltd. Jan. 11, 1960 [Jan. 21, 1959], No. 2235/59. Classes 18, 66 and 94(1). Cylindrical objects, such as coal briquettes, are arranged in pyramidal form and enclosed in a wrapping 1 that extends around the length only of the objects. End members 3 are then secured to the wrapping 1, for example by glueing or stitching. The upper end member 3 has a tear-line 4 whereby a section 5 can be torn away to permit the cylindrical objects to be removed one at a time. The package may include a handle 6 passing through slots 7 in the upper member 3 and secured thereto by extension tabs 8 at each end of the handle. The wrapping 1 may be of kraft paper and the end member 3 of thicker kraft paper or of cardboard. Specification 807,433 is referred to.
Patent GB-757881-A (GB)
Title: Control of primary emission in electric discharge tubes
Inventor: O'NEILL GEORGE DEAN
IPC: H01J43/02
Filed: 1951-01-29
Abstract: 757,881. Thermionic valves. SYLVANIA ELECTRIC PRODUCTS, Inc. Jan. 29, 1951, No. 2251/51. Class 39 (1). In a discharge tube designed for positivegrid operation, an electrode 40 with a central aperture serves as an electrostatic shield between the cathode 20 and the support 38 of the tungsten wire-mesh grid 34, a secondaryemissive electrode 36 being placed on the other side of the grid. The aperture in the electrode 40 is smaller than the active part of the grid 34 and the electrode 40 is connected externally, Fig. 3 (not shown), or internally to one cathode lead ; alternatively the aperture is larger and the electrode is operated with a negative bias. Electrode 40 prevents secondary emission from 36 that has penetrated the grid from reaching the cathode, and controls the spacecharge-limited current so that uniformity of tube operation is not dependent on the length of the cathode that is coated with electronemissive material. The cathode 20 is directly heated and is tensioned across an aperture 22 in a mica wafer 24. The electrode 40 is gripped between mica wafers 42, 44, and is connected to lead 46. The tube comprises glass parts 10, 16 and metal parts 12, 14. Specification 757,882 is referred to.
Patent GB-138335-A (GB)
Title: Improvements in blocks and coke oven walls and the like made therefrom
IPC: C10B29/02
Filed: 1920-01-24
Abstract: 138,335. American Coke & Chemical Co., (Assignees of Roberts, A.). Jan. 27, 1919, [Convention date]. Coke ovens.-In a heating- wall, a network of interconnected zigzag passages is formed by building the wall of blocks, which are recessed on at least one side face and are notched on their four edges. The blocks extend through the heating-wall and are set to break joint in adjacent courses, as shown in Fig. 2. The heating-gases may flow vertically or horizontally through the wall, and in the latter case the baffling effect may be improved by extending the reduced portion of the block to form a tongue 14, which projects into the space between the notches of the two adjacent blocks in the next course.
Patent GB-555430-A (GB)
Title: Improvements in conductor rolls for use in the electroplating of metal strip
IPC: C25D7/06
Filed: 1942-02-24
Abstract: 555,430. Conductor rolls for electroplating. TRIGGS, W. W. (Carnegie-Illinois Steel Corporation). Feb. 24, 1942, No. 2427. [Class 41] A conductor roll for contacting and supplying current to a moving metal strip in an electric plating process comprises a hollow metal member provided with a hard resistant coating 10 of a metal such as chromium, which may be electrolytically deposited over an undercoating of nickel. The shaft 3 has hollow end portions 4, 5 affording inlet and outlet passages for a cooling medium. The roll is energized through collector plates 8 connected by sliding contacts to the supply source.