baber/WOPTO huggingface dataset:
Patent GB-491292-A (GB)
Title: Improvements in or relating to cathode ray television transmitter tubes
IPC: H01J29/43
Filed: 1938-01-22
Abstract: 491,292. Cathode-ray tubes. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Jan. 22, 1938, No. 2192. Convention date, March 30, 1937. [Class 39 (i)] The mosaic structure of a cathode-ray tube comprises a nonconduc tive base with a thir layer of insulating ma terial flashed on one side thereof in vacuo and minute separated photosensitive particles on the thin layer there being a layer of conducting material on the opposite side of the base. In the form shown, a sheet of mica 14 is coated on the underside with a film of platinum 15 and on the other side with a film of cryolite, calcium fluoride or sodium fluoride 16. The film of fluoride &c. is then dusted with silver oxide then reduced by heating to minute separated particles of silver. Alternatively the silver may be applied as a metallic film which is then broken up into particles by heat treatment. The coated mica sheet is then mounted in the tube envelope which is evacuated and the silver particles oxidized and exposed to caesium vapour. The tube is then baked and any caesium deposited between the particles is taken up by a stannic oxide getter. The particles may finally be given a thin coating of nickel or silver by evaporation from an appropriately coated filament in the tube. The mica is coated with insulation by mounting it in an envelope containing a tungsten filament which has been coated with the fluoride or other insulating material, the container then being evacuated and the filament heated to flash off the material.
Patent GB-136357-A (GB)
Title: Improvements in and relating to Bib or other Cocks.
Inventor: HADEN WILLIAM NELSON
IPC: F16K11/083
Filed: 1919-01-29
Abstract: 136,357. Haden, W. N., Haden, C. I., and Horton, F. H. Jan. 29, 1919. Mixing valves.-A three-way draw-off bib and like cock for steam and cold water comprises a large cold-water inlet b and a smaller steam inlet c which meet in the body of the plug d, and pass out through a common passage d' to the nozzle e. The passages are arranged so that the cold-water inlet is opened first. A bar k depending from the handle i coacts with limit stops l on the casing. The casing a is integral with a flange plate o for fixing to a wall or the like. A stuffing-box f having packing and a gland is mounted on the body a.
Patent GB-567751-A (GB)
Title: Improvements in exhaust-pipes for internal-combustion engines
IPC: F01N13/20
Filed: 1942-02-24
Abstract: 567,751. Controlling exhaust. HORROCKS, W. A., PEARSON, H., and GAHAGAN, G. R. Feb. 24, 1942, No. 3441. [Class 7 (vi)] In connection with exhaust pipes having restricted outlets for effecting flame-damping, means are provided for increasing the area of the outlet when the exhaust back-pressure tends to increase, as when superchargers are brought into action at high altitudes. In an engine having the exhaust of each pair of cylinders connected to a chamber with fishtail outlet, and the several chambers connected together in series, the last chamber is provided with an additional outlet 14, Fig. 2, to which is attached a fish-tail 15 and a controlling- throttle 21. This throttle valve is actuated by a fluid-pressure servomotor controlled by an aneroid which also regulates the supercharger according to altitude. In another form, the exhaust pipe 30, Fig. 3, is formed with a contracted annular outlet by means of an inner sliding tube 34 diverging at 35. Air passes through the tube 34, and the exhaust outlet is automatically increased as the back-pressure acting on the flared end 35 causes the tube to move outwards against the pull of a spring 36. The spring may be omitted, and the tube 34 adjusted by the aneroid and servomotor controlled in accordance with the back-pressure or atmospheric pressure.
Patent GB-1346289-A (GB)
Title: Cyclopentanone derivatives
IPC: B01J23/00
Filed: 1973-01-17
Abstract: 1346289 Cyclopentanone derivatives SOC ANON DES ETABS ROURE-BERTRAND FILS & JUSTIN DUPONT 17 Jan 1973 [18 Jan 1972] 2466/73 Heading C2C [Also in Division A5] The invention comprises compounds of the general Formula I in which R represents a hydrocarbon group having from 3 to 7 carbon atoms, X represents -CN, -CHO, -CH 2 OH, lower alkoxymethyl, lower alkanoyloxymethyl or lower alkylcarbonyl group and Y represents an oxo or ketal group, the lower alkyl moieties in which groups contain not more than 6 carbon atoms, provided that when X is CH 3 CO- and Y is = O, R is not n-pentyl. Compounds according to the invention having the Formula III may be prepared by condensing the corresponding cyclopent-2-en-I-ene with a lower alkylcyanoacetate to obtain a compound of Formula IV in which R<SP>3</SP> is a C 1 -C 4  alkyl group which gives the compound of Formula II on hydrolysis and decarboxylation. Compound II may be ketalized by reaction with a lower alkylene glycol, or mixed orthoformate thereof in the presence of and acid catalyst to give a compound V wherein R<SP>1</SP> and R<SP>2</SP> together represent Compounds VI according to the invention in which X is a formyl group may be prepared by reduction of V using, e.g. diisobutyl aluminium hydride and may be converted to the free ketone (VII) by reaction with excess acetone at elevated temperature. Compounds according to the invention having Formula VIII may be prepared by VI by reduction, e.g. using LiAlH 4 , diisobutylaluminium hydride/ pyridine or aluminium isopropylate/isopropanol and may be converted to the free ketone IX by conventional means. Compounds having Formula X in which Z is C 1 -C 6  alkyl or C 1 -C 6  alkylcarbonyl may be prepared by etherification of VIII by known means and may be converted to the free ketone XI again by known means Reaction of an appropriate cyclopent-2-en- 1-one with a compound of Formula XIV may be used to produce a compound of Formula XIII in which R<SP>4</SP> is a C 1 -C 6  alkyl group and R<SP>5</SP> is a C 1 -C 4  alkyl group which may be converted by hydrolysis and de. carboxylation into a compound of Formula XII. A number of particular compounds of Formula I are described and the following are claimed specifically. 3-Cyanomethyl-2-n-pentyl- 1 - cyclopentanone; 3 - cyanomethyl - 1,1- ethylenedioxy - 2 - n - pentyl - cyclopentane; 1,1 - ethylenedioxy - 3 formylmethyl - 2 - npentylcyclopentane; 3 - formylmethyl - 2 - npentyl - 1 - cyclopentanone; 1,1 - ethylenedioxy - 3 - hydroxyethyl - 2 - n - pentylcyclopentane; 3 - hydroxyethyl - 2 - n - pentyl - 1- cyclo - pentanone; 3 - acetoxyethyl - 1,1- ethylenedioxy - 2 - n - pentyl - cyclopentane; 3 - acetoxyethyl - 2 - n - pentyl - 1 - cyclopentanone and 2 - n - pentyl - 3 - propionylmethyl- 1-cyclopentanone.
Patent GB-1298941-A (GB)
Title: Improvements in or relating to mixer taps or valves
Inventor: WATTS HORACE
IPC: F16K11/02
Filed: 1969-01-15
Abstract: 1298941 Valves H WATTS 13 April 1970 [15 Jan 1969] 2500/69 Heading F2V Mixer valve for hot and cold water comprises a casing 17 with a valve chamber having a radial cold water inlet port 25 at one end, an axial mixed water outlet port 28 at the other end and an intermediate radial hot water inlet 24. An axially slidable hollow valve plunger in the chamber has a pair of axially spaced transverse faces 31, 32 controlling the inlet ports, and a closure means 33 on a closed end of the plunger co-operates with a seat 29 surrounding the outlet. The plunger is movable against a spring 34 by a screw threaded operator 8. On opening the valve, the cold inlet 25 is progressively restricted and the hot inlet 24 progressively opened.
Patent GB-214186-A (GB)
Title: Improvements in casement window stays
IPC: E05C17/28
Filed: 1924-01-31
Abstract: 214,186. Gibbons, F. J. J. Jan. 31, 1924. Stays. - The stay is secured in an adjusted position by a spring-pressed pin h and a clamping screw k carried by a sleeve e arranged on opposite sides of a notched guide bar f or stay member c. In the arrangement shown, the stay c is pivotally connected at its ends to a bracket d on the fixed frame b and to the sleeve e. The sleeve is slidable along a bar f mounted on the casement window. The pin h is held out of locking engagement with the recesses i on the underside of the bar f until the screw is clamped down to press sufficiently on a movable shoe l<1>. This raises the sleeve e against the action of the spring j so that the pin enters one of the recesses i to secure the stay against movement. According to a modified construction, the clamps may be pivotally mounted in the fixed sash frame and the. clamped bar is the casement stay iteself.
Patent GB-637172-A (GB)
Title: Improvements in or relating to the production of strontium peroxide
IPC: C01B15/043
Filed: 1947-01-28
Abstract: Crystalline anhydrous strontium peroxide is obtained by heating hydrated strontium oxide and hydrogen peroxide at a temperature below the boiling point of water, e.g. 190 DEG  F., to produce hydrated strontium peroxide, adding at least ten additional successive equal portions of hydrogen peroxide to ensure continuous evolution of oxygen and to dehydrate the peroxide and finally separating and drying the crystalline peroxide at a temperature of 212-260 DEG  F., all the operations being effected in an atmosphere devoid of carbon dioxide.
Patent GB-178567-A (GB)
Title: Improvements in folding chairs
IPC: A47D1/02
Filed: 1921-01-20
Abstract: 178,567. Stanbridge, J. R., and Lindsay, N. C. Jan. 20, 1921. Clothes-horses.-A baby's chair is constructed in such a way as to be convertible into a multiple folding frame for use as a towelhorse, clothes-horse, or the like. It may also be reduced to a flat collapsed condition for transport or storage. The front legs C, associated crossmembers D, and vertical members E constitute wing frames movable about the back legs A on hinges. The legs A and associated cross-members B constitute a centre frame into the plane of which the seat F may be tilted. The seat is hinged to a cross-bar B and provided with pegs G to engage in eyes H in the front legs C. It may be held vertical by a turn-button J. The front cross-rails K, L are hinged at one end and shaped at the other to engage with a projection on a front leg.
Patent GB-633425-A (GB)
Title: Improvements in change-speed gears for bicycles
IPC: B62M25/00
Filed: 1947-01-28
Abstract: 633,425. Variable-speed ratchet gear. VINCENZONI, A. Jan. 28, 1947, No. 2667. Convention date, Aug. 21, 1942. [Classes 80 (ii) and 80 (iii)] A cycle drive-sprocket 18 is moved automatically or manually to eccentric positions in relation to the pedal-crank spindle 4 to provide continuous variation, from a ratio of one-to-one upwards, in the speed imparted to it through radially-jamming ball-ratchets 9. 10, 12, tracking grooves in a driving disc 7 secured to the spindle 4, the ratchets being connected by links 16 to the driven sprocket 18, which runs on a support-disc 20 having a radial dovetailed sliding connection with a fixed guide 22, clipped at 25 to the cycle-frame, the support-disc being moved to eccentric positions by a force acting in one direction only in opposition to the radial component of the drivethrust acting in the links 16, such force being applied through a tension member. In the manual control, Figs. 1 and 6 the tension member is a spring-loaded flexible Bowden cable secured at its end to a yoke 28 of the support-disc 20 and passing through an adjuster 33 screwed into the fixed guide 22. In the automatic load-responsive control, Fig. 8, the tension member is a rod 40 connected to the support disc yoke 28 and carrying a piston sliding in a cylinder 48 the lower end of which is screwed into the fixed guide 22. A spring 41 loads the sprocket towards the position of greatest eccentricity (maximum speed) in opposition to load-reaction tending to enforce the concentric (minimum speed one-to-one) position. Movement to increase eccentricity is retarded by oil which the piston forces through an adjustable orifice 46, opposite movement being freely permitted by the opening of a one-way valve 45 uncovering fixed ports 44. The ratchets comprise wedge-members 12 having tapered grooves carrying spring-pressed balls, two of which, 9, are on the outside and one 10 on the inside.
Patent GB-1512201-A (GB)
Title: Apparatus for electrically testing workpieces
IPC: G01N27/72
Filed: 1975-04-09
Abstract: 1512201 Eddy current testing apparatus YORKSHIRE IMPERIAL METALS Ltd 9 April 1975 [21 Jan 1974] 2709/74 Headings GIN and G1U In an eddy current testing apparatus in which an A.C. is applied to a probe coil the initial resistive and reactive components of the output thereacross are balanced by two correction circuits. Test coil 5 is energized from source 1 which is also connected via inverting amplifier 11 to a resistive correction circuit 6 and reactive correction circuit 7 the outputs of which are applied together with the output of coil 5 to the inverting input of operational amplifier 8. Initially a standard sample of a tube or rod is placed within coil 5 and coarse and fine potentiometers 13, 15 adjusted until meter 9 reads zero when the resistive component of the probe output is balanced. The reactive component of the probe, 90 degrees phase shifted from the supply, is then balanced out by fine and coarse potentiometers 21, 27 of circuit 7 which includes integrating amplifier 23 for inserting a 90 degrees phase shift. Subsequent changes in composition and dimensions of a sample placed in the coil will produce an indication on meter 9. The circuit of Fig. 1 may be modified to give a wider phase range by connecting the potentiometers to the source 1 instead of earth, Fig. 3 (not shown). To distinguish changes due to composition from changes due to dimensions two phase sensitive detectors may be provided which are connected to terminal 9 and which are initially adjusted to make the apparatus insensitive to changes in dimension and composition respectively. If meter 9a subsequently indicates a change inspection of the output of the phase sensitive detectors will indicate what has caused the change, Fig. 2 (not shown). Instead of feeding a standard sample periodically to the testing station an additional probe coil may be provided which is switched into the apparatus to check for drift. Applications. Position sensor, crack detector, thickness detector, corrosion detector, coil impedance comparator.
Patent GB-547630-A (GB)
Title: Improvements in or relating to eye shields
IPC: A62B18/08
Filed: 1941-03-03
Abstract: 547,630. Eye-shields; goggles. WYLDE, J. R., and PERRY, R. G. March 3, 1941, No. 2835. [Class 97 (i)] Eye-shields or the windows of goggles are formed of a sheet of wire gauze in association with coloured or pigmented plastic material disposed so that vision is through both the gauze and plastic material. The gauze may be backed by a sheet of plastic material, or may constitute reinforcement for two sheets welded to it, on opposite sides, by heat and pressure. Fig. 2 shows an eye-shield comprising a gauze sheet, shaped by folding at the upper corners, to the back of which a co-extensive plastic sheet and a resilient edging are secured by clips 13 ; an elastic tape 14 is threaded through slits 15. Fig. 3 shows eye-piece frames 22 carrying sheets of gauze and plastic material, and secured by hinges 23 and clips 24 to a steel frame 21 which may be hinged along the lines a a, or b 6 and b<SP>1</SP> bl, or along all these lines. The frame 21 may be lined with felt, sponge rubber &c., the frames 22 may be fixed and slotted for insertion of the gauze &c., and elastic tape 28, shaped ear-pieces, or means detachably or removably holding the frame 21 to a cap, helmet &c. may be provided. Suitable plastic materials, dyestuffs, pigments and gauze are set out in the Specification.
Patent GB-194094-A (GB)
Title: Improvements in or relating to thermo-electric pyrometers
IPC: G01K15/00
Filed: 1922-02-01
Abstract: 194,094. Birmingham Small Arms Co., Ltd., and Page, A. R. Feb. 1, 1922. Pyrometers. - In thermo-electric pyrometer systems employing a series of thermo-couples and a single meter, calibration of any one of the couples is effected by using an external resistance which can be varied to cause the meter reading to agree with that given by a standard couple. One terminal of each of the pyrnmeters 1 - - 6 is connected by a lead 13 to a plug switch 14 to which further leads 13 are connected, the end of each lead being provided with a tag &c. The adjusting resistance comprises a series of steps 10, each step corresponding to a definite change in the reading of the meter 8, the wires being arranged between binding-screws 9 to any one of which any one of the tags can be connected. The terminal 9<a> is connected to one terminal of the meter the other terminal of which is connected by a wire 12 to all the couples. A plug 14a permits of any one of the couples being connected in the meter circuit. The meter &c. may be enclosed in a box 22 divided into two compartments 23, 24 the upper compartment containing the meter and adjusting resistance.
Patent GB-1445816-A (GB)
Title: Induction airconditioning apparatus
IPC: F24F1/01
Filed: 1974-01-22
Abstract: 1445816 Induction air conditioning units ESKAWE KALTEUND KLIMA-ANLAGEN GmbH 22 Jan 1974 02921/74 Headings F4V and F4S An induction air conditioning unit comprises nozzles from which in use conditioned primary air issues to induce a flow of secondary room air through an inlet passage having an inlet 8, and two heat exchangers 3, 4 forming in use a heater and cooler respectively, the heat exchangers being rotatably mounted about a common axis 5 and being fixed relative to one another, whereby only one heat exchanger at a time may be rotated into the inlet passage. The heat exchangers are spaced by a zone 9 to permit unheated and uncooled flow of secondary air, and are rotated by a mechanical drive which is operated by hand or by a motor drive controlled by a thermostat. Filters and a condensate sump may be provided at the inlet 8. The heat exchangers are provided with flexible water inlet and outlet conduits having steel links.
Patent GB-874556-A (GB)
Title: Process for the manufacture of dialkyl, di-haloalkyl and di-alkoxyalkyl dichlorovinyl phosphates
IPC: C07F9/113
Filed: 1959-01-27
Abstract: Dialkyl di(haloalkyl)-and di-(alkoxyalkyl) -dichlorovinyl phosphates are obtained by reacting chloral with an addition compound of a trialkyl or appropriately tri-substituted-alkyl phosphite with a halide of monovalent copper, e.g. cuprous chloride.  The reaction is advantageously carried out in an inert solvent, e.g. benzene, toluene, or chlorobenzene and at a raised temperature and it is of advantage to use the reaction mixture resulting from the reaction of the corresponding alkanol or substituted alkanol with phosphorus trichloride in the presence of a cuprous halide and an inert organic solvent.  Examples are given for the production of dimethyl-, diethyl- and di-n-propyl dichlorovinyl phosphates from chloral and the addition compound of the corresponding trialkyl phosphite and cuprous chloride which is first formed from the corresponding alkanol and phosphorus trichloride in the presence of toluene.
Patent GB-161741-A (GB)
Title: Improvements in combined apparatus for measuring, mixing and delivering aggregates for conrete and the like
IPC: B28C7/04
Filed: 1920-01-31
Abstract: 161,741. Lea, T. Jan. 31, 1920. Moving-chamber apparatus; for granular and pulverulent materials.-A rotary cylinder measuring device C of the kind described in Specification 135,888 is employed in a concrete mixing apparatus.
Patent GB-827998-A (GB)
Title: Improvements in or relating to flexible couplings
Inventor: BYROM JOHN KNIGHTS
IPC: F16D3/68
Filed: 1957-01-28
Abstract: 827,998. Universal joints; resiliently mounted sprockets &c. RENOLD CHAINS Ltd. Jan. 16, 1958 [Jan. 28, 1957], No. 3011/57. Class 80 (2). When assembling a universal joint comprising hubs 1, 2 carrying interdigitating dogs 4 having concave faces 10, each of which is separated from the adjacent face on the neighbouring dog by a radial arm 11 of barrel-shaped cross-section forming part of a rubber &c. intermediate member 3, at least some of the dogs 4 can be put into place after the hubs and the rubber member have been set up, screws 5 then securing the dogs to the hubs. Lips 6 on the hubs locate the dogs 4 radially. In a modification, Figs. 2 . . . 4 (Provisional, not shown), the hub 2 is replaced by a hub carrying a sprocket. The replacement hub may alternatively carry a gear-wheel, pulley, &c. Specification 486,803 is referred to.
Patent GB-770996-A (GB)
Title: Tractor-drawn scraper device
IPC: E02F3/76
Filed: 1954-02-02
Abstract: 770,996. Earth-working apparatus. PANAFRICAN INDUSTRIES, Ltd. Feb. 2, 1954 [June 5, 1953; Jan. 12, 1954], No. 3029/54. Class 68 (1). A scraper attachment for a tractor comprises a frame 1 on which is mounted two scraper blades 16, each of which may be independently adjusted relative to the frame in three planes, namely, a vertical plane, a horizontal plane, and a plane at right angles to each of the said other planes. To permit such adjustments the supporting structure between each blade and the frame has three pairs of interengaging surfaces 20, 21, 27, 28 and 31, 32, and through each pair of surfaces passes a clamping bolt. The axis of each bolt is at right angles to the axes of the other two bolts. Each supporting structure is so mounted on the frame that, when not clamped thereto, it may be adjusted laterally thereof.
Patent GB-563783-A (GB)
Title: Improvements in or relating to the manufacture of lactams
IPC: C07D201/04
Filed: 1943-02-24
Abstract: Lactams are produced by heating ketoximes of cycloaliphatic ketones with concentrated sulphuric acid mixed with at least an equal volume of glacial acetic acid.  The sulphuric acid may be present to the extent of only 25 to 28 per cent by volume.  The mixture of acids may be heated to boiling point under reflux, and the temperature then maintained by the gradual addition of the oxime.  In examples, piperidone is obtained from cyclopentanoxime and caprolactam from cyclohexanoxime.  The use of methylcyclopentanoximes, methylcyclohexanoximes and cycloheptanoxime is mentioned.
Patent GB-456056-A (GB)
Title: Improvements in electrical starting devices for internal combustion engines
IPC: F02N11/08
Filed: 1935-01-30
Abstract: 456,056. Starting prime movers. MAINUD STARTER, Ltd., 461A, Caledonian Road, London, BURGE, H. O., Martins, Crossways, Shenfield, Essex, and MOGRIDGE, R. J., 27, St. George's Square, Regents Park, London. Jan. 30, 1935, Nos. 3043, 3969, and 3970. [Class 38 (iv)] Relates to an electrical starter system for an I.C. engine, in which the motor armature is movable axially to bring a pinion into mesh with a gear on the armature shaft and consists in the provision of means to reduce the motor torque during meshing together with means to enable an alternative D.C. or A.C. supply to be used when the gearing is fully meshed. Closure of the press-button switch 59 energizes relays 14 and 43 from the battery 30. Relay 43 connects the armature 2 in series with a field 9 across the battery so that the armature rotates at reduced torque during meshing of the gear 12. When the armature has moved to the fully meshed position a collar 13 moves a lever 23 to open circuit the relay and also to release the relay 14 so that the circuit through the motor armature and field 8 for normal running is completed. The supply for normal running may be either from the battery 30 from an A.C. supply 31 through a transformer 35, a change-over switch 40 being provided. The contact arm of the relay 14 is pivoted so that when the relay is energized and the arm 25 is restrained by the lever 23 only contacts 17, 18 close. This connects a shunt field winding 7 across the battery when the switch 40 is in the position shown. A relay 54 closes the A.C. circuit when the press-button switch 59 is closed. The shunt field winding 7 may be omitted. A time-overload cut-out 50 is provided.