baber/WOPTO huggingface dataset:
Patent GB-658984-A (GB)
Title: Improvements in toasting appliances
Inventor: SANDERSON GEORGE
IPC: A47J37/08
Filed: 1948-05-04
Abstract: 658,984. Toasters. ELECTRIC & MUSICAL INDUSTRIES, Ltd. May 4, 1948, No. 12183. '[Class 28(i)] In an electric toaster with several heat responsive means (bimetals) for cutting off the current, a fresh bimetal moves into the heating range of an auxiliary heater at each cycle, such bimetal having been prewarmed indirectly and through holes 2 from the heat of the toasting chamber to shorten the toasting period in accordance with the heat in the chamber. In addition, the toasting period is varied by varying by hand the amount of cooling air that is allowed to flow over the bimetals. The control device comprises four bimetal strips 16 mounted around a carrier 14 which is rotated 90 degrees after each toasting so that a fresh bimetal is brought under the heating effect of an auxiliary heater 17 which is in series with the toaster elements 7. The vertical slide 10, Fig. 2, carrying the bread support 8 is depressed by a finger piece 57 whereby the connecting link 22 moves the lug 21 which pulls the attached slide 19 to the left so that the attached leaf-spring 20 engages a pin 18 to rotate the bimetal carrier 14 through 90 degrees to bring a fresh bimetal 16 just, above the bimetal heater 17. The slide 19, Fig. 4, also rocks a lever 23 to move another slide 26 also to the left, so that its end slides over and presses up a plunger 30, Fig. 2, to. close switch contacts 27, 28 to energize the heaters 7 and 17. Towards the end of the press down movement of the slide 10 a plunger 40 thereon is held down by a spring wire 42, Fig. 3. The slide 26 is held in its left-hand movement position by its end 43 being engaged by a lever 44. After the timed toast interval a pin 46 on the bimetal 16 moves lever 44 to disengage 43 and allow the slide 26 to be moved to the right by spring 38 whereby it frees plunger 30 to open the circuit contacts 27, 28 thus de-energizing both heaters 7 and 17. Also when 26 is pulled to the right the cam follower 32 rides up the cam 31 thereby rocking the L- shaped lever 33 about 33a and so disengaging spring wire 42 from 40 so allowing the slide 10 to be pulled up by the spring 13 and carrying up the bread supports 8 so that the toasted bread appears at the top. At the next cycle another bimetal 16 has come into operation but since such bimetal has been already slightly warmed by the previous operation, the degree of toasting in such successive cycles is said to be more uniform than if the bimetals were cold at the start of each. Cooling air flows up and through the various mechanisms by way of openings through a main opening 48, Fig. 5 (not shown), which can be masked by a pivoted screen (51) adjusted by a fingermovable lever projecting out at the base. Thereby the operator can adjust the time of actuation of the bimetal &c. and so the toasting period. Alternatively, the air opening (48) may be provided with an iris diaphragm.
Patent GB-1071944-A (GB)
Title: Process and machine for the contin uous crystallisation of sugar syrups especially for the production of fondant in the sugar products industry
Inventor: MOISESCU CHEORGHE
IPC: C13B30/02
Filed: 1965-03-23
Abstract: 1,071,944. Crystallizing fondant. DEPUTY MINISTER OF THE MINISTERUL INDUSTRIEI ALIMENTARE. March 23, 1965, No. 12200/65. Heading A2B. [Also in Division B1] In a continuous fondant crystallizing machine of the type having a doublewalled water-cooled outer cylinder and a concentric rotatable double-walled watercooled beater 4, the beater 4 carries a plurality of helically disposed paddles 6 and a plurality of helically disposed counter paddles 7 of opposite hand to paddles 6. Due to the disposition of the paddles 6, 7, rotation of the beater 4 effects a complex movement of advancing, returning and rotation on syrup fed into the machine with a resultant advancing motion. In another embodiment, the beater 4 carries prismatic paddles each with two active faces having the functions of paddles of paddles 6 and 7 respectively. The height of the paddles 6, 7 is preferably reduced towards the outlet of the machine.
Patent GB-286122-A (GB)
Title: Improvements in the manufacture of aluminous cement
IPC: C04B7/32
Filed: 1927-05-06
Abstract: 286,122. Marks, E. C. R., (Polysius, G., [Firm of]). May 6, 1927. Aluminous cement.-In the manufacture of aluminous cement in the rotary kiln the raw materials are fed to the kiln in the form of lumps, without preliminary grinding.
Patent GB-877137-A (GB)
Title: Cross-linked polyesters derived from epoxy fatty acids or esters and trialkoxy boroxines
IPC: C08G59/40
Filed: 1957-08-29
Abstract: Cross-linked polyesters are formed from an epoxy fatty acid or ester thereof containing an average of at least two epoxy groups per molecule and a trialkoxy boroxine.  Suitable boroxines are trimethoxy, tri- (n-butoxy) and tri (isooctoxy) boroxine.  The preferred epoxy compounds are epoxidized triglycerides, e.g. epoxidized linseed oil.  The quantity of boroxine used may be less than the stoichiometric amount which is defined as one equivalent of boric acid anhydride per epoxy group.  In the example epoxidized linseed oil is converted to a tough, hard, transparent solid with about half the stoichiometric amount of trimethoxy boroxine.
Patent GB-711493-A (GB)
Title: Improvements connected with printing mechanism for association with weighing apparatus
Inventor: CLARK DONALD
IPC: G01G23/18
Filed: 1951-05-25
Abstract: 711,493. Weighing-apparatus. ASHWORTH, ROSS & CO., Ltd. Aug. 5, 1952. [May 25, 1951], No. 12247/51. Drawings to Specification. Class 143 When the capacity of a weighing apparatus, of the type described in Specifications 452,168, 711,490, 711,491 and 711,492, is manually varied, a slidable type bar set by the apparatus is rotated by a Bowden wire mechanism to present the appropriate range of weight indicia to the printing medium.
Patent GB-875429-A (GB)
Title: Fibre processing machinery element and method for manufacturing same
IPC: D01H5/74
Filed: 1958-04-17
Abstract: A textile fibre-working unit, such as a drafting apron, comprises an outer layer of elastomeric material, e.g. rubber, and an inner layer composed of elastomeric material and a fluorinecontaining polymer, e.g. poly-tetrafluoroethylene, poly-chlorotrifluoroethylene or chlorotrifluoroethylene-vinylidene fluoride copolymer; the said polymer may be a fatty semi-solid at room temperature.  In a preferred embodiment, the drafting apron comprises an inner (roller and nose-bar contacting) layer of a butadieneacrylonitrile copolymer (100 parts) having a chlorotrifluoroethylene polymer (2 parts) dispersed therethrough and an outer (fibre-contacting) layer of a butadiene-acrylonitrile copolymer; a specified such inner layer composition comprises also ZnO, TiO2, S, stearic acid, di-b -naphthylp-phenylenediamine, tetramethylthiuram monosulphide, hydrated silica, tricresyl phosphate and brown factice.  The term "elastomeric material" includes natural rubber, synthetic rubbers, e.g. polymers and copolymers of butadiene, styrene, acrylonitrile, chloroprene and polysulphide, as well as p.v.c., polyethylene and polyurethanes.
Patent GB-1298942-A (GB)
Title: Nickel-chromium-cobalt alloys
Inventor: TWIGG PETER LINDSAY
IPC: C22C19/05
Filed: 1969-03-07
Abstract: 1298942 Alloys INTERNATIONAL NICKEL Ltd 5 March 1970 [7 March 1969] 12260/69 Headings C7A, C7D  An alloy has a composition in the following range in per cent by weight. Cr 23À5 - 26À0 C 0À01 - 0À2 Co 14À0 - 24À0 Mo 0À5 - 2À1 Ti and Al 4À25 - 5À6 in total, the ratio of Ti:Al being 1:1 to 4:1 Nb 0 - 2À0 B 0À001 - 0À05 Zr 0 - 0À15 Hf 0 - 0À1 Mg 0 - 0À04 Rare earths 0 - 0À3 Yt 0 - 2 Ni and impurities the balance with the provisos that 10B+Zr is at least 0À02 and the concentrations of Nb, Ti and Al are such that the composition falls within the area ABCDA of the drawing. As impurities Si should be below 1% and Mn and Fe may be present up to 1% and 2% respectively. The alloy may be used as a matrix for alloys dispersion hardened by the presence of finely divided refractory particles such as thoria, yttria, lanthana, ceria or rare earth metal oxides which may be present in amount of at least 0À2% by volume, e.g. À05-5%. The alloys of the invention may be solution treated, e.g. at 1050-1250C for 1-8 hours and aged at 600-950C for 1-24 hours, with or without intermediateageingat 800-1050C for 1-16 hours. Cooling may be by air cooling or transfer to a furnace at a lower temperature. The Mg content may be given by vacuum melting the remainder of the alloy and adding an Ni-15% Mg alloy, and then vacuum casting.
Patent GB-542332-A (GB)
Title: Improvements in cathode ray tubes
IPC: H01J31/40
Filed: 1940-07-29
Abstract: 542,332. Cathode-ray tubes. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. July 29, 1940, No. 12310. Convention date, July 29, 1939. [Class 39 (i)] An electron beam is scanned over a perforated screen with a photo-electric coating on which an image to be transmitted is projected and the electrons passing through the screen are concentrated on a small space where there is a collecting device particularly an electron-multiplier. The invention is described in connection with apparatus of the type in which the electron beam is subjected to a longitudinal magnetic field, so that it is deflected parallel to a pair of deflecting electrodes, and reaches the screen with a very small velocity. As shown a beam from the gun 2 is scanned vertically by electrodes 30, 31 and a coil 12 and horizontally by coils 32, 33. After passing through the perforated screen 3 it is acted on by coils 37, 38 and plates 35, 36 arranged to reverse the scanning deflections. The plates 35, 36 also have a fixed potential difference so that the beam is deflected downwards to the electron multiplier 7 which can then be placed out of the way of the light rays by which the image of the object 4 is projected on the screen 3. The multiplier is of the type composed of a number of coaxial cylinders with their ends closed by grids of emissive material. The screen 3 is made of perforated sheet metal, such as oxidized nickel, coated on one side only with insulating enamel on which is formed a mosaic of sensitized metal particles in known manner. In a modification the scanning due to the plates 30, 31 is neutralized by two pairs of plates which successively deflect the beam laterally and vertically, and the beam may be reflected between these two stages, from the end wall of the tube. The reflecting charge may be produced on the end of the tube by the scanning beam before transmission commences, and may be on the glass of the tube or on a transparent metal screen attached to it.
Patent GB-1255040-A (GB)
Title: Speed and voltage controls for a.c. motors
IPC: H02P27/04
Filed: 1969-03-10
Abstract: 1,255,040. Control of A.C. motors. DANFOSS A.S. 10 March, 1969 [16 March, 1968], No. 12374/69. Heading H2J. An asynchronous motor 26 is supplied from rectifier 12 through a voltage regulator 15 associated with a battery-fed resistor 16, for adjusting the output voltage of the regulator, and a voltage divider 18, 19, connected across leads 13, 14. An intermediate circuit comprises choke 21 and capacitor 22 for smoothing voltage U1 which is applied to an inverter comprising controlled rectifiers 24 and diodes 25, and incorporating a common quenching circuit 27. The voltage U1 is also applied to frequency regulator 29 which transmits pulses to a control device 30 feeding the quenching circuit 27, at a frequency much greater than the mains frequency, and which provides the rectifiers 24 with triggering pulses. When the regulator voltage is reduced for lowering the motor speed, the frequency is also reduced but the motor operates only slightly above synchronous speed and the regenerated current is easily absorbed by the capacitor 22. The voltage regulator 15 may comprise a controlled rectifier shunted by a diode, a quenching rectifier, and a series arrangement comprising a choke and a commutating capacitor. The controlled rectifier is triggered to pass pulses at a predetermined frequency, the width of these pulses being determined by the firing of the quenching rectifier in dependence upon the required voltage, Fig. 5 (not shown). The frequency regulator 29 comprises a transistor which receives the control voltage U1 and charges a capacitor in proportion. When the capacitor voltage reaches a threshold value, the capacitor discharges through a unijunction transistor the base of which is connected to output terminals through a transformer, Fig. 7 (not shown).
Patent GB-821852-A (GB)
Title: Improvements in or relating to adjustable pulleys
Inventor: FAULKNER BERNARD
IPC: F16H55/56
Filed: 1956-04-24
Abstract: 821,852. Adjustable V-pulleys. FENNER & CO. Ltd., J. H. June 24, 1957 [April 24, 1956], No. 12454/56. Class 80 (2). Flanges 11, 12 of a V-belt expanding pulley are both adjustable by means of right and lefthand threaded screw 17 partly contained within the radial thickness of an internally-tapered split hub 13 which fits over an externally-tapered split sleeve 14. Screws 15 and 16 effect wedging action to lock the sleeve to a mounting-shaft and the flanges to the hub. Two or more pairs of flanges may be provided on an elongated hub, corresponding flanges of each pair being connected together for simultaneous displacement by the adjusting screw. In Fig. 4 (not shown) the flanges are bolted to keys slidable in keyways in the hub.
Patent GB-780621-A (GB)
Title: Internal combustion engines with exhaust-gas-actuated compressors supplying scavenging and supercharging air
IPC: F02B37/02
Filed: 1955-04-29
Abstract: 780,621. Arrangement of exhaust conduits; superchargers. KONINKLIJKE MASCHINEFABRIEK GEB. STORK & CO., N.V. April 29, 1955 [May 15, 1954], No. 12506/55. Class 7(2) In an engine having three or more cylinders a, b and c, Fig. 1, and provided with two or more exhaust-gas-actuated turbines 30 and 40 operating compressors for supplying scavenging and/or supercharging air, one turbine being supplied with exhaust gas from two or more cylinders, a combustion space of at least one cylinder is provided with at least two separate exhaust outlets acting in parallel which are each connected to a single turbine. The engine pistons in cylinders a, b, c operate with a mutual phase displacement of 120 crank angle degrees whilst each cylinder incorporates piston controlled inlet ports, not shown, and four overhead exhaust valves 5-8. Each pair of exhaust ports opens into a separate pipe 20-25, and pipes 20 and 22...24 merge into pipes 26 and 27 respectively. Pipes 21, 26 and 25, 27 enter separate chambers in turbines 30 and 40, respectively, the exhaust gas for each turbine being therefore derived from cylinder a or c plus half the exhaust from cylinder b some 120 crank angle degrees later. The exhaust valves may be piston-controlled and divided into two or more groups, each opening into an exhaust pipe connected to a separate turbine; the pipes are not in communication when the ports are closed. In a modification the engine has seven cylinders arranged as shown, in Fig. 3 to supply exhaust gas to four turbines A-D; turbines B and C are connected to cylinders 2, 3, and 5, 6 respectively, whilst turbines A and D are actuated by gas from cylinders 1, 4 and 7, 4 respectively. Cylinders 1, 4 and 7 each have two separate exhaust pipes and sets of valves or ports, whilst turbines A and D each embody separate inlets; the latter may be of unequal area. The remaining cylinders and turbines. may also be provided with twin exhaust pipes and inlets, respectively. In a further modification, non-return valves 64, 65, Fig. 4, are used to prevent interference between the exhaust gas from different cylinders which flow to a common turbine.
Patent GB-1208446-A (GB)
Title: Improvements in or relating to the preparation of silicates
Inventor: WHITTAM THOMAS VINCENT
IPC: C01B33/32
Filed: 1967-03-17
Abstract: 1,208,446. Sodium silicate. PETER SPENCE & SONS Ltd. 12 March, 1968 [17 March, 1967], No. 12528/67. Heading C1A. Sodium metasilicate hydrate is prepared by crystallization or recrystallization from a mixture of sodium silicate in an aqueous solution or aqueous slurry dispersed in a non-aqueous liquid which does not react with the silicate to alter the sodium/silica ratio. The water content of the reaction mixture is adjusted to the amount required to form the desired hydrate. The crystallization is effected in the temperature range of 0-100‹ C. preferably in the range of from 15‹ C. up to a temperature of 15‹ C. below the melting point of the hydrate. The hydrated sodium silicates produced are found to yield certain zeolites more quickly than reactions using sodium silicates prepared by conventional methods.
Patent GB-1506737-A (GB)
Title: Proximity detector
IPC: F02P7/06
Filed: 1975-03-26
Abstract: 1506737 Proximity detectors DUCELLIER & CIE 26 March 1975 [3 April 1974] 12628/75 Heading G1N [Also in Division F1] A proximity detector includes a resonant circuit made up of an inductor 10 in parallel with a capacitor 11 which circuit is connected with transistor 3 to provide an oscillator, oscillations of which are halted by the passage of a conductor element 18 in front of the inductor 10. An amplifier constituted by a transistor 13 delivers an output signal, which varies between two levels as a function of  the passage of the conductor, to a terminal 17 through a current limiting resistor 14. The supply for the detector is provided by a Zener diode 1, current to which is limited by a resistance 2 in series with it. Bias for the transistor 3 is supplied via resistor 7 and diodes 8, 9 through a tapping on the inductor 10. In an alternative embodiment Fig. 2 (not shown) the collector of the amplifier transistor 13A is returned to the cathode of the Zener diode through a current limiting resistance 14A. This arrangement requires only two terminals since the current limiting resistance 2 is external to the detector. A further development Fig. 3 (not shown) uses an additional transistor (19) and resistances (20, 21) to limit the base current drawn from the amplifier transistor (13B) and to provide a low output impedance. The detector may be used in an I.C. engine ignition timing circuit (see Division F1).
Patent GB-411859-A (GB)
Title: Improvements in or relating to cooking ovens
IPC: F24C15/14
Filed: 1932-12-12
Abstract: 411,859. Cooking-stoves. MAIN, Ltd., R. & A., and WORTLEY, G. W., Gothic Works, Falkirk, Stirlingshire. Dec. 12, 1932, No. 12674/34. Divided on 411,839. [Class 126.] In a gas cooking-oven in which the inner lining 12 of the oven door, or the inner walls of the oven, or both, are provided with drip sills 17, 24, a trough 18 carried by part of the framework of the oven is provided for catching the drips from the sills. The trough 18 is provided along the top of a gas conduit 19. The forward ends of the three-sided framework forming the drip sills 24 are provided with downwardly directed parts 26 with notches 27 above the trough ; and the top surface 21 of the lower part of the framework of the oven door opening is sloped towards the trough. The lower edge of the back plate 29 is swaged at 30 to project over the sill 24. Specification 394,008 is referred to.
Patent GB-353471-A (GB)
Title: Improvements in or relating to television and other electrooptical systems for reproducing pictures and the like at a distance
IPC: H04N7/06
Filed: 1930-04-24
Abstract: 353,471. Television. ELECTRICAL RESEARCH PRODUCTS, Inc., 195, Broadway, New York, U.S.A.-(Assignees of Horton, J. W. ; 23, Coolidge Hill Road, Cambridge, Massachusetts, U.S.A.) April 24, 1930, No. 12676. Convention date, May 25, 1929. [Class 40 (iii).] In television and other electrooptical systems for producing successive images of a changing scene, the views are recorded successively, e.g. photographically on a film and separate portions of the record are transmitted simultaneously over separate channels. The scanning discs at each station have several sets of apertures, each set being associated with a separate photo-electric cell or light-valve. The film is fed intermittently through the camera 12, continuously through developing and fixing tanks 13, 14, and intermittently through the transmitter 17, groups of three pictures being scanned simultaneously, light from the lamp 19 through the upper, middle, and lower pictures passing through the scanning disc 23 to the photoelectric cells 5, 6, 7 respectively. Each cell may modulate a separate carrier frequency, controlling discharge lamps, Fig. 5 (not shown) or light-valves 8, 9, 10 at the receiver, the modulated light being guided by lenses and reflectors so as to record three separate pictures simultaneously on a film fed intermittently through the recording camera 36. The film is fed uniformly through developing and fixing tanks 38, 39 and intermittently through the projector 40. Specification 242,694, [Class 40 (iii), Telegraphs, Electric], is referred to.
Patent GB-851962-A (GB)
Title: Production of pure silane
IPC: C01B33/04
Filed: 1959-04-15
Abstract: SiH4 free from B2H6 is prepared by reacting a silicon halide or halogeno-silane with an alkali metal aluminium hydride in a solvent in the presence of a minor amount, sufficient to prevent the formation of B2H6 from a boron compound present as impurity in the reaction mixture of an alkaline earth metal aluminium hydride. Alkaline earth metal may be Be, Mg, Ca, Sr, or Ba and the aluminium hydride may be present in amount 0.00001-1.5% wt.  The alkali metal may be Li, Na, or K, and the solvent dimethyl, or diethyl, ether or tetrahydrofuran, and the reaction temperature 10 DEG C. to reflux. Silicon halides may be SiCl4, SiBr4, SiF4, or SiHCl3.  A solution of SiCl4 in tetrahydrofuran is added to a solution of NaAlH4 in tetrahydrofuran containing Ca(AlH4)2 and the whole refluxed under He, A, N2, or H2. Thermal decomposition of the SiH4 gives Si.
Patent GB-1507015-A (GB)
Title: Device for preventing metallic contact and for determining and controlling the spacing between grinding members
IPC: B02C7/14
Filed: 1976-03-30
Abstract: 1507015 Disc mills DEFIBRATOR AB 30 March 1976 [7 April 1975] 12750/76 Heading B2A A mill and particularly a disc mill which comprises a pair of grinding members or discs 22, 24 at least one 22 of which is rotatable and exerts axial pressure on material in the space between the discs by means of a known servo - motor system 44, includes at least two portions of one disc 24 insulated from each other and from the rest of the mill and connected to the poles of a current source 104. The current flowing thus depends on the conductivity of the material bridging the two portions and thus the distance apart of the two discs. Direct contact between the disc produces a short circuit. A control screw 94 for the servomotor is driven by a motor 98 in response to current charges and the system can thus maintain a desired refining gap. Insulation is effected e.g. by use of an insulating plastics packing behind the disc 24 or by use of individually insulated disc segments Fig. 3 (not shown).