baber/WOPTO huggingface dataset:
Patent GB-1435586-A (GB)
Title: Electrical control systems for automatic fuel ignition
IPC: F23N5/20
Filed: 1973-05-25
Abstract: 1435586 Burner ignition and control CONTROLS CO OF AMERICA 30 April 1974 [25 May 1973] 25243/73 Heading F4T In an automatic ignition system for a burner, closure of a control switch TH, e.g. a room or boiler thermostat switch, energizes a relay A for a predetermined period. The relay closes a switch A 1  and thereby opens a solenoid-actuated gas valve 8 and energizes an igniter 14 to ignite the burner 12. A second relay B energized in response to detection of the flame, opens switch B 1  to isolate the igniter and lock the relay A in its energized state. If the burner fails to ignite during the predetermined period then relay A automatically locks out and the gas valve 8 will close. If after ignition of the burner the flame fails, then relay B becomes de-energized and thereby locks out relay A to close the gas valve. To commence another starting cycle after failure due to either of these reasons, a reset switch S must be operated. When the thermostat switch TH opens, the relay B will be deenergized causing the switch B 1  to close and the relay A to become de-energized to close the gas valve. The electrical circuit of the system, Fig. 2 (not shown), is so arranged that on failure of any of its components except a resistor (R 1 ), the relay A will de-energize and close the gas valve. Moreover, it includes a lock-out warning lamp (L).
Patent GB-939267-A (GB)
Title: Measurement and control of constituent chemical potentials
IPC: G01N27/12
Filed: 1960-01-25
Abstract: In a method of measuring and controlling the atmosphere in a metal-treating furnace as in Specifications 675,457 and 646,078, a measuring element capable of absorbing an amount of the constituent to be determined to a degree dependent on the concentration of that constituent is selectively immersed in either a sample of the atmosphere or a gaseous mixture of nitrogen and hydrogen obtained from an ammonia dissociator.  The description is identical with that of Specification 939,265. Specification 850,940 also is referred to.
Patent GB-867836-A (GB)
Title: Flexible conduit
IPC: B29D23/18
Filed: 1957-08-12
Abstract: 867,836. Making resilient pipes. DAYCO CORPORATION. Aug. 12, 1957 [Sept. 20, 1956], No. 25330/57. Class 99(2). An elastic thermoplastic tube 12, e.g. of polyvinyl chloride, which is initially of smaller internal diameter than the external diameter of a reinforcing plastic-coated coil spring 10, is expanded to allow the spring 10 to be inserted and then released so that it contracts around the coils of the spring which forms corrugations therein, the tube being then bonded to the coil 10 by heating in such a manner that general softening or plastic flow of the thermoplastic material is avoided. The tube 12 is expanded by a suction tube 13 and the spring 10 is inserted by means of a mandrel 15 which is preceded by a sponge 16 which coats the interior of the tube with adhesive. After release of the tube to grip the spring, the adhesive is cured by heat to bond the tube to the spring. In a modification the spring is merely pulled through the expanded tube unsupported by the mandrel. To ensure the maintenance of a desired spacing between the coils of the spring, a flexible mandrel 19, Fig. 8, supported on a perforated rigid mandrel 22 and provided with a helical groove 19a to accommodate the spring, is inserted into the spring and then inflated until the spring rests in the groove 19a. The assembly of mandrels and spring is inserted into the expanded tube 12 which is then released to contract on to the spring, after which the mandrel 19 is deflated and removed. The plastic coated spring 10, Fig. 10, may be coated with a thermo-setting adhesive 23 which is set, after the tube 12 is applied, by local heating produced by passing an electric current through the wire core of the spring. Alternatively the adhesive may be omitted and the spring heated to fuse its plastic coating 11a to the tube 12.
Patent GB-942300-A (GB)
Title: Improvements relating to electrically heated liquid containing radiators
Inventor: III WILLIAM WESTOVER
IPC: H05B3/06
Filed: 1961-07-13
Abstract: 942,300. Mounting electric immersion heaters. WESTOVER WHEELBARROWS Ltd. April 10, 1962 [July 13, 1961], No. 25417/61. Heading HSH. An electric immersion heater comprises a tank 1 having an inwardly extending sleeve 3 into which may be slid a plug 5 carrying a heater element 6, the plug 5 abutting the shoulder 4 of the sleeve 3, and being sealed to the sleeve by two resilient rings 7. The plug may be held in place by a circlip 10 engaging a groove 9 in the sleeve.
Patent GB-998498-A (GB)
Title: Copolymerization of tetrafluoroethylene and hexafluoropropylene
IPC: C08F214/28
Filed: 1962-07-03
Abstract: Copolymers of tetrafluoroethylene and hexafluoropropylene are prepared by a process in which a mixture of tetrafluoroethylene and hexafluoropropylene having a vapour density of 0.18 to 0.30 g./c.c. is copolymerized at 95 DEG  to 138 DEG  C. and a total pressure of 400 to 750 p.s.i.g. in an aqueous system containing a dispersing agent having a solubility in water of at least 0.1 weight per cent under the reaction conditions, in the presence of free radical producing initiator having a half life of less than 9 minutes under the reaction conditions, the reaction having been initiated by contacting an initial charge of hexafluoropropylene with an amount of initiator in the absence of tetrafluoroethylene, the amount of initiator used in the initiation step being at least 6.5% of the amount used during the copolymerization.  The initiator may be a water-soluble peroxide, persulphate or azo compound.  The dispersing agent may comprise a perfluoroalkyl or a -hydro and/or o -hydro perfluoro-alkyl group attached to a hydrophilic group, e.g. a carboxylic, phosphoric, phosphonic or sulphuric acid group or an alkali metal or ammonium salt thereof, many suitable compounds being listed.  The dispersing agent may be formed in situ by charging 5 to 15% of the tetrafluoroethylene immediately after the initiation stage.  In examples, hexafluoropropylene and tetrafluoroethylene are copolymerized in aqueous media in the presence of potassium persulphate in the absence (1 and 2) and presence (3 to 10) of dispersing agents, initiator being added continuously during the copolymerization stage and the pressure being maintained by the addition of tetrafluoroethylene. Specification 829,600 is referred to.
Patent GB-686740-A (GB)
Title: Improvements in overload release elements for electric switches
Inventor: ALTER SIEGFRIED
IPC: H01H73/30
Filed: 1950-03-02
Abstract: 686,740. Automatic circuit-breakers. CRABTREE & CO., Ltd., J. A. Oct. 3, 1950 [March 2, 1950], No. 25544/51. Divided out of 686,688. Class 38 (v) A thermal overload release device for an electric switch, particularly a handle-operated motor starting switch, comprises a substantially straight bimetallic strip i which is separated from an encircling heater coil h by means of loose interposed insulating plates h<SP>I</SP>. These plates may be of mica and are loose so as not to interfere with the bending of the strip. They are wider than the strip i and are located at their lower ends by a centralising rivet h<SP>2</SP> engaging in slots h<SP>3</SP> in the plates. When the device is applied to the switch of Specification 686,688, the strip i is secured to a terminal strap m and projections e<SP>7</SP> of the casing locate the upper ends of the insulating plates h<SP>I</SP> and prevent the possibility of short circuiting between the heater coil h and the strap m. The coil h is connected to a terminal g<SP>I</SP> at its upper end and has its lower end j welded to the strip i. The strip i acts on an extension 24 of a trip bar 23 to cause the tripping of the switch. Specifications 686,739 and 686,741 also are referred to.
Patent GB-249071-A (GB)
Title: Improvements in or relating to paper making machinery
IPC: D21F1/02
Filed: 1925-10-13
Abstract: 249,071. Mead Pulp & Paper Co., (Assignees of Heisel, R. E.). March 12. 1925. [Convention date]. Fourdrinier paper-machines; thickness of paper, regulating.-The flow of stock to the forming wire is controlled by a flexible plate 47, Fig. 4, pivoted at 46 to a lip member 30 which is pivoted to a curved plate member at 33, the pivot being extended at its ends to form a stub shaft carrying a. worm wheel 60, Fig. 2, engaged by a worm 61 on the shaft 62 by the rotation of which the lip member may be raised and lowered. The plate 47 is adjusted throughout its length by a number of screws 53 provided with locking screws 54. A graduated disc 65 and a fixed pointer 66 are provided to facilitate adjustment. When it is desired to lift the breast roll in order to change the wire, the shaft 62 is rotated to lift the lip member. The apron 15, which is hinged at 16 may be connected by a chain or the like to the lip member 30 and lifted therewith.
Patent GB-628214-A (GB)
Title: Improvements in or relating to rotary wing aircraft
IPC: B64C27/41
Filed: 1947-09-19
Abstract: 628,214. Rotary-wing aircraft. SPERRY GYROSCOPE CO., Inc. Sept. 19, 1947, No. 25573. Convention date, Sept. 20, 1946. [Class 4] In a rotary-wing aircraft of the type in which the rotor head 15 may be tilted bodily in any direction, the bearing member between the rotor and fuselage is formed by partspherical cup-shaped members 27, 28 attached to the rotor hub and fuselage respectively, the upper end of the drive shaft 12 being connected to the rotor by a universal joint 14. The drive shaft also incorporates an Oldham coupling 13. Lubricating oil is supplied to the bearing by a pump 37 through ports 35, 36. An outer shell 43 forms a drip pan for the oil. Shock absorbers 31, 32 are mounted between the fuselage and rotor. For cyclic pitch control purposes, flexible drive shafts 66, Fig. 2, tilt a spherical swash-plate 54 connected to the rotor blades by vertical links 81, through bevel gearing 65, 63 and a worm-gear 61. Collective pitch control is imparted to the blades by a flexible shaft 45, Fig. 1, which, through bevel gearing 46, 48, rotates a sleeve 49 connected to a verticallymovable part-spherical sleeve 53 by pin-andslot connections 51. Tilting of the hub may be indicated by pick-offs from a gyro vertical 56. In the embodiment shown in Figs. 6 and 8, each rotor blade is .formed in two segments, the inboard one 81 being of fixed pitch and the outboard one 82 of adjustable pitch. The vertical links 83 connected to the swashplate control a hydraulic servomotor 115 supplied by a pump 141, the motor rotating members 119 connected by steel tapes 121 to horizontally-slidable members 122 fitted with helical grooves 123 engaged by pins 124 on the respective outboard blade portion.
Patent GB-1276579-A (GB)
Title: Mixing apparatus
IPC: C08F36/04
Filed: 1970-05-27
Abstract: 1276579 Mixing apparatus polymerisation apparatus SNAM PROGETTI SpA 27 May 1970 [29 May 1969] 25586/70 Headings B1C and B1X [Also in Division C3] Apparatus suitable for mixing and heating or cooling viscous liquids such as those produced in polymerisation reactions comprises a cylindrical vessel I having a plurality of radially disposed members 2 located along the axis of the vessel, the members acting as baffles and providing heat-exchange surfaces, and a rotatable shaft 3 provided with arms carrying blades 6 passing from one end wall of the vessel through each of the members to the other end wall, the blades being arranged to scrape the heat-exchange surfaces of the members when the shaft is rotated. The walls of the vessel and the radially disposed members may be hollow so that a heat transfer fluid may be passed therethrough. The members may be provided with ports 7 which are staggered so that the liquid flows radially outwards and inwards in its passage through the vessel. The arms may also be provided with blades to scrape the inside surface of the walls.
Patent GB-1323918-A (GB)
Title: Bandstop filter
IPC: H03H11/12
Filed: 1971-04-19
Abstract: 1323918 Active filters INTERNATIONAL BUSINESS MACHINES CORP 19 April 1971 [16 April 1970] 25604/71 Heading H3U A bandstop filter comprises a current node E<SP>1</SP> to which are connected: a series connected resistor R1 and commutated network BPF arranged to block current I in a frequency band centred on the commutating frequency; and a current generator GEN controlled by the filter input signal E. The commutating signal may be derived from the input signal as described in Specification 1,323,917. The resistor and device may be connected in the feedback circuit of an amplifier OA, T1 the output from which is coupled to a pair of output transistors in unit GEN. A current bias circuit CT is also coupled across the feedback path.
Patent GB-961668-A (GB)
Title: Process for the manufacture of acrylonitrile
Filed: 1960-07-22
Abstract: The invention comprises the processes for making acrylonitrile by (1) pyrolysing a , b 1-dicyanodiethyl ether at 150-750 DEG C., and (2) condensing lactonitrile (or acetaldehyde and HCN) with acrylonitrile to produce a , b 1-dicyanodiethyl ether, pyrolysing this at 150-750 DEG C. to acrylonitrile and water, and recycling part of the acrylonitrile for condensation with lactonitrile (or acetaldehyde and HCN). The pyrolysis step may be effected in the absence of an added catalyst, or by dropping the ether on to a heated dehydration catalyst, such as phosphoric acid, pyrophosphoric acid, metaphosphoric acid, alkali or alkaline earth metal oxides, hydroxides, carbonates and borates and salts of fatty acids, alkali metal and ammonium phosphates, zinc salts, aluminium salts and aluminium oxide, or by passing the vaporized ether through a bed of dehydration catalyst, such as activated alumina, pumice, diatomaceous earth, fullers earth, silica gel, alundum, thoria and dehydrating clays, or a supported catalyst such as phosphoric acid or ammonium phosphates or zinc chloride on a solid carrier such as activated alumina, pumice, kaolin, clay, firebrick, or silica gel.
Patent GB-721415-A (GB)
Title: Improvements in fillers and their use in compounding butyl rubber
IPC: C08K9/06
Filed: 1952-10-04
Abstract: A mixture of butyl rubber and a filler selected from precipitated hydrated silica, precipitated hydrated calcium silicate and kaolin, the filler having been reacted with 10-undecrenyltrichlorosilane and having an average particle size not greater than 10 microns, is vulcanized.  The filler may be reacted with the silane before incorporation in the rubber or the rubber, filler and silane may be hot-milled at, e.g. 250-400 DEG  F., preferably in the presence of an alkaline earth metal carbonate. Zinc oxide and other ingredients such as stearic acid and sulphur may be added after the hot-milling treatment.  The vulcanizates may be used in the manufacture of inner tubes for pneumatic tyres. Specification 715,244 is referred to.ALSO:A filler for butyl rubber comprises the reaction product of precipitated hydrated silica or precipitated hydrated calcium silicate or kaolin and 10-undecenyltrichlorosilane, the filler having an average particle size not greater than 10 microns.  The amount of silane employed may be generally from 5-15 per cent of the weight of the silicon containing material.  The silane may be added to a slurry of the unreacted filler in a low-boiling hydrocarbon, e.g. benzene or petroleum ether, and heated at reflux, or the unreacted filler may be placed in a tube and saturated with the silane passed therethrough. Specification 715,244 is referred to.
Patent GB-1401299-A (GB)
Title: Device for measuring the density of a radiation image
IPC: G03B27/80
Filed: 1972-06-01
Abstract: 1401299 Photo-detector circuits EASTMAN KODAK CO 1 June 1972 [4 June 1971] 25718/72 Heading G1A [Also in Divisions G2 and H3] A circuit for measuring the density of a radiation image comprises a plurality of detector sub-circuits connected to an amplifier in such a way that a varying control signal applied to the amplifier succesively affects coupling elements connected between the amplifier output and the detector sub-circuits to cause the amplifier output to correspond to the detector outputs in turn. As shown, Fig.1, a plurality of photo-resistors 61 are provided with load resistors 64 and connected to a bias supply 62. The common connection to the photo-resistors is connected to the inverting input of an op amp 66 the output of which is fed back to the photo-resistor circuits by individual pairs 65 of back to back diodes which act as constant current elements. The inverting input of the op amp is also connected via a resistor 75 to a potentiometer connected across a second bias supply. The tapping point 74 of the potentiometer is stepped from one end to the other and as it does so the output of the op amp falls from its original positive saturation value to the output of the least illuminated photo-resistor circuit at which level it remains for a number of increments related to the current drawn and then falls to the output level of the next-to-least illuminated photoresistor and so on until it reaches the most illuminated photo-resistor circuit level and then goes into negative saturation. In the resulting histogram, which may be recorded, the output levels correspond to the illumination levels of the photoresistors irrespective of which one is the most and which the least illuminated and the lengths of the level portions represent the number of photoresistors receiving that level of illumination. The circuit may be used in the measurement of a transparency or print by transmission or reflection and may be provided with a lens for use as a light meter which may provide an output for or be used in conjunction with an exposure control system.
Patent GB-1521675-A (GB)
Title: Method of manufacturing glass
IPC: C03B19/09
Filed: 1977-06-20
Abstract: 1521675 Making glass SOC ANON DITE COMPAGNIE GENERALE D'ELECTRICITE 20 June 1977 [7 July 1976] 25736/77 Heading C1M Glass (e.g. soda lime glass) is made by melting powdered mineral compounds in a vitreous silica crucible which is thin enough that during the homogenization of the melt at least 80% of the thickness thereof is devitrified, whereby, on cooling the melt, the crucible fractures and the melt remains free from cracks. Production of fibre forming glasses is disclosed. It is possible to core drill optical fibres from the solidified melt.
Patent GB-955397-A (GB)
Title: Improvements in or relating to brassieres
IPC: A41C3/00
Filed: 1961-07-17
Abstract: 955,397. Brassieres. TRIUMPH INTERNATIONAL A.G. July 17, 1961 [July 18, 1960], No. 25754/61. Heading A3V. A brassiere is provided with angle seams 5 for shaping the cups, forming substantially rectangular strip-like portions 16 wherein the warp or weft threads may be parallel to the outer edge or to the seam 5.
Patent GB-1517862-A (GB)
Title: Heater supply circuit for a cathode-ray tube in a television receiver
IPC: H04N5/63
Filed: 1976-06-22
Abstract: 1517862 Cathode supplies for cathode-ray tubes INTERNATIONAL STANDARD ELECTRIC CORP 22 June 1976 [1 July 1975] 25836/76 Heading H4T [Also in Division H2] In a television receiver, the supply for the heater of the cathode-ray tube is derived from the horizontal centring coil HCTr which corrects the position of the image on the screen of the tube. A primary winding of a flyback transformer FTr is supplied with a horizontal line sweep signal HLF and a secondary winding of the transformer is connected via a D.C. blocking capacitor C to horizontal deflection coils HDC. The horizontal centring coil, which has a high impedance to prevent short circuiting of the coils HDC, is constructed as an auto transformer from which the heater voltage V PTH  for the cathode ray tube is tapped. In a modification, the auto transformer is replaced by a transformer having separate primary and secondary windings, the secondary winding providing the heater voltage and the d.c. for the horizontal centring control.
Patent GB-225021-A (GB)
Title: An improved mounting for coffin handles, door knockers, or the like
IPC: A61G17/04
Filed: 1923-10-17
Abstract: 225,021. Gordon, H. Oct. 17, 1923. Knockers. - In a mounting for coffin handles, door knockers, &c, the pivot pin supporting the handle &c. 5 is entirely enclosed in an hollow boss 7a integral with or secured to the roseplate 7 serving for attachment to the coffin &c. The handle is pivoted between the jaws of a slotted member 6a fitted in the boss 7<a>, which is slotted to allow passage of the handle. A lead filling 8 is added. In a modification in which the boss is formed separately from the plate, the boss has a preferably cruciform base which is passed through a corresponding hole in the plate and flanged over. It may be secured by solder &c.
Patent GB-1083336-A (GB)
Title: Improved construction of draught and weather excluding strip
Inventor: RANSOM LESLIE HENRY
IPC: E06B7/232
Filed: 1963-07-01
Abstract: 1,083,336. Draught &c. excluder strips. CHAMBERLIN WEATHERSTRIPS Ltd. June 29, 1964 [July 1, 1963], No: 25992/63. Heading E1J. A metal &c. weather excluding strip comprises a fixing flange 10 joined to a sealing flange 12 by a rounded yoke 14 so that part of the rounded yoke stands proud of the back face of the flange 10 which is longer than the flange 12 to facilitate fixing and the edges of the strip are bent back on themselves to stiffen those edges.
Patent GB-685335-A (GB)
Title: Improvements in and relating to phonograph stylus supports
IPC: H04R1/16
Filed: 1950-10-25
Abstract: 685,335. Stylus arms and mountings. BRITISH THOMSON-HOUSTON CO.. Ltd. Oct. 25, 1950 [Oct. 29, 1949], No. 26020/50. Class 40 (ii) [Also in Group XXXIX] In a gramophone pick-up, a stylus arm 1, acting as a vibratory armature between magnetic pole-pieces 5, is in the form of a cantilever of flat-sectioned material twisted in the form of a gradual spiral for the purpose of avoiding a major resonance, or resonances, dependent on mass and length of the stylus arm. The arm is thus considered to consist of an infinite number of masses of different magnitude vibrating in different planes about an infinite number of axes A, B, C, &c. Specification 685,293, [Group XXXIX], is referred to.