baber/WOPTO huggingface dataset:
Patent GB-794291-A (GB)
Title: Improvements in or relating to heat exchanger
IPC: F28F9/20
Filed: 1956-02-29
Abstract: 794,291. Electric heating. BRANSTROM. G. E. Feb. 29 1956 [March 3, 1955], No. 6334/56. Class 39(3) A heat exchange device comprises a casing 13 of highly heat conductive material completely enclosing a space containing a radiant heat emitter 12, the external surfaces of the casing are exposed for contact by a medium to be heated, and all the internal surfaces are highly reflective so that rays from the heater, such as 14 and 15, are reflected by them. The heater may be an electric ribbon, or coiled resistance wire, heater, and the casing may be of stainless steel with a polished interior. Figs. 4 and 5 show a heat source 16 within a casing having a reflecting wall 18 and an angularly shaped end reflecting surface 19 formed as in Fig. 4 by an insert structure 25, and in Fig. 5 by the end wall of the casing. The reflecting surfaces, as at 19, may be made of glass with metallized reflective surfacing, e.g. mirror stock. Figs 8 and 9 show an end reflector formed of many plane reflective surface portions 34 angularly related. The portions or mirrors 34 are cemented to a bowl shaped base 40, and such a reflector may be supported in the casing by brackets or secured to the curved end wall of the casing. The latter is preferably evacuated and hermetically sealed but it may have an air inlet such as 46. Fig. 1.
Patent GB-795485-A (GB)
Title: An improved cone or bobbin for use in the doffing of spun yarn from the centrifugal pot of a worsted yarn spinning machine
Inventor: ROBERTSHAW EDWIN CLIFFORD
IPC: B65H75/18
Filed: 1956-02-29
Abstract: 795,485. Bobbins. PATONS & BALDWINS, Ltd. July 11, 1956 [Feb. 29, 1956], No. 6344/56. Class 120(3) A cone or tapered bobbin 1, on to which a yarn package 5 is doffed as it is released from a centrifugal pot of a worsted yarn spinning machine, is made of toughened plastic or like pliable material on an aluminium or like metal base 2 and the end 1a which first enters the pot during doffing is formed with equally spaced longitudinal splits 3 which may normally be held closed by an elastic device, such as a rubber band 4, but which enable the bobbin end to be expanded, as by insertion of a conical plug 6, to take up the slackness in the doffed yarn.
Patent GB-1386123-A (GB)
Title: Method and drawing die assembly for producing jointless endless  metal bands
IPC: B21D53/14
Filed: 1972-02-11
Abstract: 1386123 Making endless belts; stamping MIYAMOTO & CO Ltd 11 Feb 1972 6547/72 Headings B3A and B3Q  Seamless, endless metal belts are made by deep drawing a metal sheet and removing the base and rim of the drawn blank to leave an endless belt. A die-set may be used which has a a circular or elongated cavity for producing belt-blanks of various shapes, Figs. 2-5 (not shown). Co-operating projections and recesses in the holddown (3) and die (1) facilitate control of the drawing operation. The heat treatment may be performed with the belt on a tension reel.
Patent GB-1173211-A (GB)
Title: Improvements in Lighting Control Apparatus
Inventor: ISAACS ANTHONY LEONARD
IPC: H05B37/02
Filed: 1967-02-10
Abstract: 1,173,211. Lighting control systems. THORN ELECTRONICS Ltd. 10 Feb., 1967, No 6568/67. Heading H2H. [Also in Division G3] To prevent variation in lamp brightness in a lighting control system generally similar to that described in Specification 1,171,915, which variation is caused by a beat signal derived from harmonics of the lamp power supply (50 cycles/sec.) and the waveform (100 cycles/sec.) produced by the divider 16, these frequencies are maintained in a predetermined harmonic relationship. To this end the lamp power supply is also applied to the master oscillator 15 which may consist of a number of harmonic generators coupled in cascade which generate the oscillator's output signal by direct frequency multiplication from the supply frequency. Alternatively the master oscillator may be synchronized to a signal derived by harmonic generation from the supply frequency by direct injection of the harmonic signal into the oscillator circuit. Another arrangement can be that shown in Fig. 2 in which the oscillator 15 includes an amplifier 33, a voltage-controlled frequency determining element 34 (which may be a motor-driven tuned circuit, a reactance transistor or a saturable inductor) controlled by a phase comparator 35, and a feedback path 36. Member 35 compares the oscillator's output phase with that of a signal generated by a multiplier circuit from the power supply, the error signal being used to control the oscillator output frequency to maintain the predetermined frequency relationship. Member 34 may be replaced by an astable multivibrator having the resistors of its timing circuits returned to a controlled bias supply. The arrangement shown in Fig. 3 uses an oscillator 39 whose frequency is chosen so that after a gate 38 is opened by a flip-flop 40 (once in every cycle of the power supply), the divider 16 performs a complete cycle and operates an AND gate (not shown) to reset the flip-flop 40 before the next power supply-dependent pulse from member 41 occurs. The predetermined relationship may be an odd or even multiple according to a desired effect required in the system, e.g. to prevent the appearance of D.C. in the controlled output an even multiple is chosen.
Patent GB-235318-A (GB)
Title: Improvements in or relating to artificial teeth
IPC: A61C13/10
Filed: 1924-03-14
Abstract: 235,318. Reed, A. E. March 14, 1924. Teeth, artificial.-Interchangeable teeth for various kinds of denture, but particularly for permanently fixed bridge work, are formed for engagement with a post projecting from a platform or the like connected to the denture, and are positively and detachably held in place by a headed screw engaging the free end of the post. Fig. 2, shows a molar a formed with passage through which passes a post f projecting from a platform g. The tooth is held in place by a screw d engaging the end of the post and formed with a head entering a countersunk recess c in the tooth. The root portion f<1> of the post f is bevelled and of oval-section. Anterior teeth are similarly constructed; Figs. 8 and 9 showing the separated posts of a modified form for metal plate work wherein the base i of the tooth and the platform g are curved. A crown for a natural root j is shown in Fig. 10. In this form the projecting lip a<1>, shown in Figs. 2 and 8, is omitted, and the platform g extends on both sides of the post f. For vulcanite work the platform is replaced by a bar g<1>, Fig. 11, embedded in the vulcanite, and the post f is of uniform thickness throughout its length. The enlarged end b<1> of the passage b through the tooth a, Fig. 12, becomes filled with the plastic material of the denture.
Patent GB-493352-A (GB)
Title: Electromagnetic instrument for determining the orientation of a movable body in a magnetic field
Filed: 1937-03-06
Abstract: 493,352. Magnetic tests ; potentiometers ; variable resistances ; dials and scales. GUERRA, U. March 6, 1937, No. 6713. [Class 37] [Also in Group XIX] A static induction device for obtaining at a distance the orientation of a movable body in a magnetic field comprises a sensitive element A responsive to the magnetic field, a potentiometer or course control B, and an instrument C indicating course variations. The element A comprises two pairs 1, 3 and 2, 4 of small bars of an iron-nickel alloy having high permeability disposed perpendicularly to one another so as to form a closed magnetic circuit 5, 6, 7, 8 having projections at the corners responsive to the earth's magnetic field. On the closed circuit 5, 6, 7, 8 are windings 9, 9<1>, 10, 10<1>, 11, 11<1>, 12, 121, in series with an A.C. supply 13, 14, which produce an alternating flux and thereby permeability variations in the magnetic circuit. At the centres of the magnetic bars 1, 3 forming a pair are windings 15, 15<1> connected in series and in opposition as regards the alternating flux in the closed magnetic circuit 5, 6, 7, 8. A second pair of windings 16, 16<1> is similarly arranged on the other pair of bars 2, 4. The variation of the permeability of the bars due to the alternating flux causes a variation of the flux in the bars due to the earth's field which induces E.M.F's at the terminals a, b, c, d, of the windings 15, 15<1>, 16, 161 of double the frequency of the A.C. source 13, 14. The terminals a, b, c, d are connected to the corresponding terminals of the potentiometer B which consists of two circular resistances 21, 21<1> arranged one above the other so as to be engaged by rotatable sliders 24, 24<1> in the same axial plane connected through a reversing switch 39 and the indicating instrument C to a rectifier 42, 43, 43<1>. On the shaft 26 carrying the sliders 24, 24<1> is mounted a drum 27 carrying two scales 30, 30<1>. One of these forms a continuation of the other when proceeding in the same direction. The reading of each scale is effected by a cursor 35 in the centre of a small window in a frame 31, which is vertically movable so that one or other of the scales 30, 30<1> is covered. A knob 36 operates a cam 33 to lift the frame 31 and at the same time operates the reversing switch 39. A frequency-doubling transformer 41 may be provided so that the exciting current for the rectifiers 43, 43<1> is of the same frequency as that in the circuit of the sliders 24, 241. Since the ratio between the currents in the circuits a, b and c, d is a sinusoidal function of the ratio between the relative angles that the pairs 1, 3 and 2, 4 of bars make with the direction of the earth's field, the resistances 21, 21<1> should have a sinusoidal shape in order that the scale markings may be uniformly spaced. This may be effected by winding them on a former having a shaped edge.
Patent GB-289223-A (GB)
Title: Fastenings for attache cases and the like
IPC: E05B65/52
Filed: 1927-03-11
Abstract: 289,223. Cheney, C. W. March 11, 1927. Stud-and-socket fastenings for attachÚ cases. The hoop a adapted to slidably engage a rigid socket e is provided with a spring catch a<2> that snap-engages with a detent or projection e<3> within the interior of the socket, a hand-operated member d' being also carried by the hoop for disengaging the catch from the detent. The detent is carried by a blade spring d' and it projects through a slot a<2> in the face of the hoop. It is withdrawn by moving a thumb piece d<6> attached to the cam member d<7>, as shown. Specification 245,231 is referred to.
Patent GB-542638-A (GB)
Title: Improvements in or relating to coin-freed watermeters
IPC: G04B37/04
Filed: 1940-04-18
Abstract: 542,638. Water meters. PLAS, F. VAN DER. April 18, 1940. No. 6982. [Class 27] A coin-operated water meter has a meter 10, 11, 12 of known form furnished with coin mechanism comprising a disc 2 driven by gearing 14 from the meter shaft 10 when water passing through rotates the impeller 15. The disc is normally held from rotation by a spring-pressed pin 17 engaging a small hole 16. The pin is moved by a bell-crank 28 the tail of which extends into the path of a coin 42 inserted in a shoot 22. After insertion of the coin a button 32 is pressed in and through the coin 42 pushes the tail and withdraws the pin 17. By the time the button is released the disc hole 16 has moved away sufficiently for the pin 17 to come up against a groove on the under face of the disc and to allow the latter to make one rotation before the pin. snaps in again. For a small discharge of water. the groove may be circular, but for a larger discharge a spiral groove may be provided with another hole 16 at its inner terminus, thus allowing several revolutions of the disc 2 to take place for a given coin. Upon release of the button it is returned by a spring 38 and the coin falls into a collecting box. The disc 2 may be replaced by a pivoted pawl which holds down pin 17, the pawl being removed by a cam on the shaft of a toothed wheel, which, after one revolution, knocks off the pawl. Other forms of pin-holding and releasing device are described.
Patent GB-310410-A (GB)
Title: Holders for christmas trees and the like
IPC: A47G33/12
Filed: 1929-03-04
Abstract: 310,410. Finnegan, W. A. April 25, 1928, [Convention date]. Pedestal stands.- A base for supporting an upright member, such as a Christmas tree trunk, consists of four similar members 12 each formed with a dovetail projection 13 at one end and a dovetail groove 14 in one side so that the members can be interlocked, as shown in Fig. 1, to form a socket 15 to receive the Christmas tree &c.
Patent GB-855191-A (GB)
Title: Method of producing nitrogen dioxide in a nuclear reactor
IPC: C01B21/36
Filed: 1957-03-04
Abstract: <PICT:0855191/III/1> Nitrogen dioxide and nitrous oxide are produced by subjecting air at a pressure exceeding 10 atmospheres in a nuclear reactor to the ionizing radiation present in the reactor and the oxides of nitrogen are removed from the reactor.  Air is pumped by pump 2 into nuclear reactor 1 and at 10-25 atmos. and 175-225 DEG C. is subjected to fission fragments, BETA-and g -rays, and fast neutrons from a fine dispersion of enriched uranium or plutonium. Where the air is used to extract heat from the reactor it is passed through steam generator or gas turbine 3, otherwise the treated air flows direct to cooling tower 4, where liquid N2O4 condenses.  The residual air is returned through compressor 7, with resulting cooling which removes N2O if desired, to the reactor 1.
Patent GB-1276272-A (GB)
Title: Bimetallic coin
Inventor: HARRISON BRIAN G
IPC: A44C21/00
Filed: 1971-03-12
Abstract: 1276272 Bimetallic coin or token FRANKLIN MINT Inc 12 March 1971 7106/71 Heading B3A [Also in Division G4] A bimetallic coin, token, medallion, gambling chip or commemorative coin 10 comprises a layer of aluminium or aluminium alloy 16 sandwiched between layers of stainless steel 18, 20. The aluminium 16 forms 80-95% of the total coin thickness and allows for stretching and bending of the stainless steel 18, 20 for embossments 12, 14, the aluminium undergoing the bulk of the deformation. The stainless steel and aluminium have substantially the same light reflective properties, and the coin 10 has a milled edge 22. The stainless steel is clad to the aluminium in sheet form by heat and pressure, typically by rolling at 20,000 p.s.i. and 850‹ F.; a suitable cladding method is described in U.S. Patent Specification 2,782,498.
Patent GB-1015035-A (GB)
Title: An improved process for preparing foamed polyurethanes
IPC: C08G18/16
Filed: 1963-02-21
Abstract: Polyurethane foam is prepared by reacting an organic polyisocyanate with an organic compound having more than one active hydrogen atoms, and water in the presence of a compound of formula Sn(OCOR)2 or R1aSnXb, where R and R1 are hydrocarbon groups, X is chloride, ester, mercapto, hydroxyl or mercapto-ester, and a and b are integers of total 4, and as blowing catalyst a carboxylic acid salt of ammonia, an alkylamine, an alkali metal or an alkaline earth metal.  Specified salts are ammonium, including quaternary alkyl ammonium, Li, Na, K, Mg, Ca, Sr, and Ba salts of acids of formula R111 (COOH)n, where n = 1, 2 or 3 and may be derived from the following acids: benzoic, naphthoic, phenylacetic, cinnamic, toluic, methyl toluic, naphthenic, acetic, propionic, butyric, caproic, caprylic, capric, stearic, oleic, and tall oil fatty acids.  The reaction may be a single stage in which all the reactants are mixed at room or elevated temperature. Alternatively the catalysts and water may be added to a reaction product of the other reactants containing excess polyisocyanate. A trimethyl-end block dimethylsiloxane may also be present.  The compound having more than one active hydrogen atoms may have a molecular weight of at least 500.  Specified compounds are polyesters, optionally iso-cyanate modified, polyethylene glycols, polypropylene glycols, polyisocyanate modified polyesteramides, polymercaptans, polyamines, polyisocyanate modified polyalkylene glycols and glycerides of castor oil, hydrogenated castor oil or blown natural oils.  The percentage of water may be 0.5-10. There may be 0.005-4.95% of blowing catalyst and 0.01-5 times as much tin compound.  R and R1 may be Me, Et, Prn, Pri, Bun, Bui, But, amyl, hexyl, 2-ethylhexyl, heptyl; octyl, nonyl, decyl, undecyl, oleyl, o-, m- and p-tolyl, naphthyl, cyclohexyl or benzyl and X = chloride, laurate, 2-ethylhexoate, mercaptide, lauryl mercaptide or isooctylthio-glycolate. They may be used with or without N-ethylmorpholine.  The product may be used for cushions and insulation.  In the examples a glycerine centred polypropylene oxide was reacted with a tolylene-2,4 and 2,6-diisocyanate mixture in the presence of trimethyl end-blocked dimethyl polysiloxane, demineralized water, a gelation catalyst and a soap. In Examples (1-10) the gelation catalyst was stannous 2-ethyloctoate and the soap was (1) calcium stearate (2) magnesium stearate (3) barium stearate (4) lithium stearate (5) sodium stearate (6) ammonium tallate (7) potassium oleate (8) strontium 2-ethylhexoate (9) calcium naphthenate (10) ammonium stearate.  In other examples the polyalkylene polyol was replaced by a polyester of adipic acid and (11) the gelation catalyst was dibutyltin di-2-ethylhexoate and the soap was a barium stearate/calcium stearate mixture.
Patent GB-701596-A (GB)
Title: Apparatus for the production of photographic images on various materials
IPC: G03B27/16
Filed: 1951-03-27
Abstract: 701,596. Photographic contact-printing apparatus. WASTEELS, H. L. J. March 27, 1951 [March 28, 1950; April 12, 1950], No: 7118/51. Class 98(2) Photographic contact-printing apparatus for the continuous production of photographic images on light-sensitized textile or like flexible material comprising a fixed shaft mounted on supports, a closed first cylinder of material pervious to actinic light rigidly and concentrically mounted on the shaft, at least one source of actinic light mounted in the first cylinder, a second cylinder, of larger diameter and of material pervious to actinic light mounted concentrically with the first cylinder and able to turn on the fixed shaft, this second cylinder bearing an endless photographic negative on its periphery, is characterized in that the shaft is hollow and communicates by means of perforations with the interior of the first cylinder and that means for creating a pressure reduction, in the first cylinder communicate with the interior of this cylinder by means of this hollow shaft and the perforations provided therein. As shown, a hollow shaft 1 is rigidly mounted on two supports 2, the lower ends of which slide in horizontal rails 4. Rigidly mounted on the shaft 1 is a quartz or silicate glass cylinder 5 in the flat end plates 6 of which are apertures through which extend tubes 7 for generating actinic light, the conductor wires 8 passing into and along the shaft 1. A second cylinder 10 of material pervious to actinic radiations turns on the shaft 1 by means of a ball, roller, or needle bearing 12, and carries a photographic image carrier 13. Alternatively, the image may be engraved or formed by other means on the cylinder 10. The conical end members 11, 11<SP>1</SP> may be detachably mounted on the shaft 1 to permit the removal of the cylinder 10 and its replacement by a similar cylinder bearing a different photographic carrier. A blower 15 blows air or other cooling fluid through the duct 17 leading to the end 22 of the shaft 1, which is provided with a partition 18 and with orifices 19 through which the air passes into the end member 11 of the cylinder 10. The air, after passage between the two cylinders, escapes through the holes 20 in the end member 11<SP>1</SP>. A vacuum pump 21 communicates with the other end 24 of the shaft 1, the air being drawn out from the interior of the cylinder 5. A screen 30 absorbing actinic radiations may be provided between the cylinders 5 and 10, and two conical elements 31 assisting in providing fluid-light separation between the cylinders are keyed on to the shaft 1. The web 27 sensitized with a diazo compound is fed between the guide roller 26 and the cylinder 10, and after passage round the cylinder is led off round a second guide roller.
Patent GB-549826-A (GB)
Title: Improvements relating to electrically operated sound producing horns
IPC: G10K9/12
Filed: 1941-06-05
Abstract: 549,826. Diaphragm horns. LUCAS, Ltd., J., and LUCAS, O. June 5, 1941, No. 7127. [Class 13] A double-tone horn comprises a pair of air passages b designed to produce two tones of different pitch, a diaphragm g mounted over one end of each passage, and electromagnetic means for vibrating the diaphragms. The air passages b are formed in part by spiral grooves in opposite faces of a member a forming the body of the horn and in part by an extension e projecting from one side of the body and internally divided by a member f. Each groove b is closed by a flat plate c having a central aperture opposite the inner end of the groove. Each operating means comprises a coil j, core k, armature l secured to the diaphragm g, and an interrupter q.
Patent GB-1025134-A (GB)
Title: Preparation of aqueous emulsions of plasticised polyvinyl chloride
IPC: C08J3/03
Filed: 1965-02-18
Abstract: Glyceryl monorincinoleate may be prepared by reacting castor oil with glycerol in the presence of sodium acetate at 250 DEG C.ALSO:Oil-in-water emulsions of plasticized polyvinyl chloride are prepared by mixing a polyvinyl chloride plastisol and water in the presence of an oil-soluble monoglyceride, an ionic surface-active agent, a weak base and a weak acid which with the base constitutes a buffering system.  Specified plasticizers are dioctyl adipate, dibutyl phthalate, dioctyl phthalate and tricresyl phosphate. Specified glycerides are of stearic, lauric, oleic, linoleic and ricinoleic acids.  A proportion of diglyceride may be present. Specified surface active agents are alkyl sulphates, alkylaryl sulphonates and alkali metal and ammonium soaps.  The preferred buffer constituents are sodium carbonate and boric acid.  The compositions may also comprise pigments and thickeners, e.g. sodium or ammonium alginate, methyl cellulose and carboxymethyl cellulose, and may be diluted with water for use as coating compositions. Examples describe aqueous emulsions comprising polyvinyl chloride, dioctyl phthalate, glycerol monoricinoleate, sodium lauryl sulphate, sodium carbonate, boric acid, ammonium polyacrylate together with (1) epoxy resin and stabilizer, and (2) calcium carbonate and sodium hexametaphosphate.
Patent GB-466529-A (GB)
Title: Improvements relating to the moulding of articles from thermoplastic and thermo-setting compounds
IPC: A61G17/00
Filed: 1936-03-10
Abstract: Boxes and coffins are moulded from cellulose acetate or thermo-setting synthetic resin such as that known under the Registered Trade Mark "Bakelite."
Patent GB-685473-A (GB)
Title: Improvements relating to motor control systems for electrically propelled vehicles
Inventor: ROBERTS FREDERICK WALTER
IPC: B60L15/12
Filed: 1950-03-23
Abstract: 685,473. Control of D.C. motors. ENGLISH ELECTRIC CO., Ltd. March 16, 1951 [March 23, 1950]. Drawings to Specification. Class 38 (iii) A control system for a vehicle which derives its power from an external source of supply and has at least one direct-current, series type, driving motor, includes switch means for connecting a substantially non-inductive resistor in series with a reverse-current relay across the motor field winding so as to weaken the motor excitation, the relay being arranged to open-circuit the resistor automatically if, due to a sudden appreciable drop in the supply voltage, or an interruption in the supply, the current through the relay reverses. The contacts of the reverse-current relay may be connected directly in circuit with the resistor or arranged indirectly to open-circuit the resistor. Re-setting of the relay may be made dependent upon the return of the controller to the "off'' position or other switch means may be used for this purpose.