baber/WOPTO huggingface dataset:
Patent GB-899135-A (GB)
Title: Improvements in or relating to demodulators for amplitude modulated time division multiplex communication systems
Inventor: FLOWERS THOMAS HOWARD
IPC: H04J3/04
Filed: 1959-02-13
Abstract: 899,135. Pulse modulation systems. POSTMASTER GENERAL. Feb. 5, 1960 [Feb. 13, 1959], No. 5165/59. Class 40(5). A demodulator for amplitude modulated pulses includes a transistor VT connected by its base and emitter electrodes across a parallel resonant circuit LC having a resonant frequency equal to at least half the reciprocal of the duration of an input pulse, reception of an input pulse charging the resonant circuit so as to bias the transistor to a condition of non-amplification, and subsequent discharging of circuit LC causing the transistor to assume a condition of amplification, the resultant collector current being dependent on the amplitude of the input pulse. In the preferred embodiment, the current pulses in the collector circuit are supplied to a load impedance W through a low-pass filter WF, inductor L being earthed at a point intermediate its ends so that circuit LC is critically damped. The demodulator is described with reference to a time division multiplex system comprising a plurality of such demodulators activated in turn by channel pulses from a generator CP applied to unblock respective rectifiers MR. Specification 899,134 is referred to.
Patent GB-658264-A (GB)
Title: Hardened non-ferrous alloy
IPC: C22C9/06
Filed: 1948-02-21
Abstract: 658,264. Hardened copper alloys. CHICAGO DEVELOPMENT CO. Feb. 21, 1948, No. 5204. Convention date, Oct. 23, 1939. [Classes 72 and 82(i)] Corrosion resistant alloys consisting of Cu, Mn and Ni the proportions of which elements are those of compositions lying within the shaded area of the drawing, are given a large range of mechanical properties by being subjected after casting to at least one cycle of heat treatment comprising a softening step of heating to a temperature of 500‹C to 900‹C and a hardening step of heating to a temperature of 350‹C- 450‹C. The use of alloys in the production of such articles as springs, tools, diaphragms, hardware, condenser tubes, tanks, pressure vessels, metal furniture, bearings, dies, moulds, nuts, bolts and screws is referred to. The Specification as open to inspection under Sect. 91 comprises also all alloys whose compositions are within the curved line of the Figure and such alloys may contain also about 1.5 per cent Ag, up to about 0.2 per cent B, up to about 1 per cent Si, up to about 1 per cent Be and up to 10 per cent Cr. This subject-matter does not appear in the Specification as accepted.
Patent GB-778495-A (GB)
Title: Processes for the production of vinyl ether derivatives
IPC: C07C59/60
Filed: 1956-02-20
Abstract: Vinyl ether derivatives are obtained by the action of phosgene on a vinyl ether of the general formula <FORM:0778495/IV(b)/1> where R1 is an allyl radical of up to 4 carbon atoms, or with R3 forms a 4 : 5-dihydrofuran or 5 : 6-dihydropyran ring, R2 is H or an alkyl radical of up to 4 carbon atoms, and R3 is H or alkyl of up to 4 carbon atoms, or together with R1 completes a 4 : 5-dihydrofuran or 5 : 6-dihydropyran ring, at the most at room temperature, and in presence of a tertiary base not exceeding 0.2 mol. per mol. phosgene in quantity.  The products in the case of the simple vinyl ether are a chlorinated ether and a b -alkoxy-acrylic chloride, and in the case of the furan and pyran compounds are a furan or pyran carboxylic chloride and a chloro-tetrahydropyran or furan, which on further treatment with alcohols or phenols give in the case of the chloro-ether an acetal, or the corresponding alkoxy or aryloxy pyran or furan, and in the case of the carboxylic chloride, an alkyl or aryl ester.  In examples: (1) carbonyl chloride reacts with ethyl vinyl ether to give b -ethoxyacryloyl chloride and a -chloroethyl ether, the former of which may be converted into b -ethoxy acrylic acid or ethyl b -ethoxy acrylate; (2) carbonyl chloride reacts with ethyl ethyl-vinyl ether to give ethyl a -chlorobutyl ether, and a -ethyl-b -ethoxyacryloyl chloride, converted to a -ethyl-b -ethoxy acrylic acid by caustic soda hydrolysis, and butanal by acid hydrolysis; the ethyl ester of the a -ethyl-b -ethoxy-acrylic acid is referred to; (3) carbonyl chloride reacts with 2 : 3-dihydrofuran or 5 : 6-dihydropyran to give 2-chlorotetrahydrofuran, or 2-chlorotetrahydropyran, and 2 : 3-dihydropyran-4-carboxylic acid chloride or 5 : 6-vinyl ethers specified include butyl and allyl vinyl ethers, and the product from 2-methyl-4 : 5-dihydrofuran and carbonyl chloride is converted directly into 2-methyl-2-ethoxytetrahydrofuran and ethyl 2-methyl-4 : 5-dihydro - furan - 3 - carboxylate. Specification 570,974, [Group IV], is referred to.
Patent GB-1483033-A (GB)
Title: Vehicle window heating circuit
IPC: H02J7/14
Filed: 1976-02-11
Abstract: 1483033 Supply circuits for vehicle window heaters FORD MOTOR CO Ltd 11 Feb 1976 05294/76 Heading H2H A circuit for de-icing and de-misting a vehicle window comprises a first switch 51 for connecting a heating element 30 to an output terminal A of a generator, a second switch 52a, 52b normally occupying a first state and a control circuit 32 responsive to a manual actuation to switch the second switch to a second state for a limited period of time and thereafter to return the second switch to its first state. The generator may be an alternator having a field winding 22 and when the switch 51 is closed, the alternator supplies power to the heating element to demist the window. In order to de-ice the window a switch 53 is closed and the control circuit 32 causes the switch 52a, 52b to occupy its second state. In this position an ignition warning light 14 is short circuited and a voltage regulator 18 is supplied only from the battery 12 so that the high field winding current causes a high output from the alternator. Since the switch 52a is open, this output is fed only to the heating element 30. After a predetermined time, a timer circuit in the control circuit 32 causes the switch 52a, 52b to return to its first state. A thermistor in the timing circuit may vary the de-ice period in dependence on the interior temperature of the vehicle. A battery voltage sensor in the circuit 32 prevents de-icing being initiated if the battery voltage is low. The switches 51, 52a, 52b may be transistors or thyristors.
Patent GB-1450224-A (GB)
Title: Method of removal of nitrogen oxides
IPC: B01D53/94
Filed: 1974-02-05
Abstract: 1450224 Nitrogen oxide-reduction catalyst HITACHI SHIPBUILDING & ENG CO Ltd 5 Feb 1974 [28 May 1973] 05322/74 Heading B1E [Also in Division C1] A catalyst for the reduction of nitrogen oxides in exhaust gases comprises alumina carrying (i) copper, (ii) a component comprising an alkali metal, alkaline earth metal or a transition metal other than copper or a noble metal and (iii) ruthenium or rhodium. The Examples describe catalysts of gamma-alumina impregnated with copper, rhodium or ruthenium and magnesium, potassium, barium, chromium, manganese or molybdenum.
Patent GB-197086-A (GB)
Title: Improvements in the rendering, melting, or cooking, of fat
IPC: C11B1/12
Filed: 1922-02-23
Abstract: Fatty matter such as meat scraps or restaurant garbage is rendered by agitating in a heated vessel until practically all moisture has been driven off through a small opening, and the temperature has risen to about 248 DEG  F.  Preferably the vessel is steamjacketed.
Patent GB-525312-A (GB)
Title: Improvements relating to tractor-trailer couplings for motor road vehicles
IPC: B60D1/56
Filed: 1939-02-17
Abstract: 525,312. Trailer couplings. GLEDHILL, T. Feb. 17, 1939, No. 5332. [Class 103 (v)] A road vehicle coupling adapted to be detachably mounted on a bumper or like bar d of one of the vehicles comprises two flat bars a each provided with oppositely directed hook-like projections c adapted to be engaged with the bumper bar d by presenting them at an angle thereto and then turning them parallel therewith, the adjacent ends b of the bars a which are bent outwards and twisted through a right angle being then connected together by a pin f to which the drawbar of the other vehicle may be attached. The modification shown in Fig. 5 consists of a single bar a provided with oppositely directed hook-like projection or projections c on each side of the central lugs b carrying the drawbar coupling pin f the projections c being secured to the bar a by bolts i. In each case screws h are provided having a clamping action on the bumper bar to prevent sideways movement and rattling.
Patent GB-488962-A (GB)
Title: Improvements in elastic hubs for vehicle wheels
IPC: B60B9/00
Filed: 1937-02-22
Abstract: 488,962. Vehicle wheels. SOC. ITALIANA BREVETTI INVENZIONI (S.I.B.I.) Feb. 22, 1937, No. 5334. Convention date, Feb. 20, 1936. [Class 144 (i)] A resilient hub, of the kind described in Specification 467,164, comprises a rectangular frame 5 slidably mounted between rollers or bolts 2 .. 2<111> which connect the outer flange 3 to a flange 1<1> on the axle-sleeve 1. Fitted between the frame 5 and disc 3 is a spider 4 fixed to the wheel-rim 10 and having its arms 4a guided between pairs of rollers 6-6<1>, 6<11>-5<111> on the frame 5. Vertical displacements of the latter are transmitted through a cup 11 and ball 12 to the cupped end 13 of a sleeve 14 enclosing an axial-thrust spring 15. The Specification as open to inspection under Sect. 91 describes also (a) means for enclosing the wheel parts comprising a disc extending across the outer face of the wheel and, at the inner side, a floating disc slidably fitted between a pair of discs secured to the rim and hub ; and (b) a modification in which the arms 4a of the cross-member are grooved to engage single studs on the flange 1<1>. This subject-matter does not appear in the Specification as accepted.
Patent GB-212895-A (GB)
Title: Apparatus having a variable and adjustable outflow for the distribution of all liquids in measured quantities by volume
IPC: B67D7/16
Filed: 1924-03-01
Abstract: 212,895. Boutillon, H. March 17, 1923, [Convention date]. Fixed-chamber apparatus; varying quantity measured in; multiple-chamber apparatus; valve systems for.- Relates to apparatus of the type in which the measuring chamber is provided with several discharge tubes rising to different heights in the chamber, and consists in providing a single control device for two such chambers so that one fills while the other is emptying. The chambers 1, which may be of glass or metal, are clamped between a cover and a base 2 and are fitted with tubes 19 of various heights communicating by passages 18 with the casings 7, 8 of two discharge valves 10, 11. Passages 17 serve to empty completely the chambers 1. The discharge passes by way of a pipe 20 and flexible delivery hose 21. Between the two discharge valves is an outlet valve 9 arranged to allow the liquid from a supply pipe 13 entering one or other of the chambers 1 through passages 14 or 15. Overflow pipes leading back to the supply tank determine the height to which the chambers may be filled. The spindles of the valves are fitted with toothed wheels 29, 30, 31 which engage with a common rack 32 guided in a gear casing formed as an extension of the valve casing. The valves are arranged in the relative position shown in Fig. 1. The central spindle is providied with a handle which when turned moves the inlet valve and through the rack turns the other valves in the same direction. Pointers in use with the handle move over a graduated scale and show the quantity of fluid being delivered.
Patent GB-271563-A (GB)
Title: Improvements in or relating to the construction of portable folding advertising or display devices or stands
IPC: A47F5/10
Filed: 1926-02-25
Abstract: 271,563. Lutman, A., and Rowntree & Co., Ltd. Feb. 25, 1926. Rack-stands.-A portable folding display stand has three sides open at the near, the sides and front of the stand being either cut away or formed to provide supports for the displayed articles. A cardboard &c. sheet is cut or stamped to form slightly tapering sides 1, Fig. 1, connected by front portions 6, 7, which may receive advertisements &c. Articles or goods for display are placed in the cut-away portions of the stand. In a, modification, the sides of the stand are formed of bent wire 8, Fig. 3, connected by front plates 9. Supporting flaps 10 are hinged to the lower part of the stand. The wire at the lower part of the stand may be shaped so as to form supporting struts.
Patent GB-198054-A (GB)
Title: Improvements relating to spraying apparatus
IPC: B05B7/12
Filed: 1922-02-23
Abstract: 198,054. Bunney, W. J. B. Feb. 23, 1922. Air &c. pressure sprayers; nozzles with cut-off devices.-An atomizer more particularly for spraying disinfectants &c. into the atmosphere is mounted to rotate upon concentric air and liquid supply pipes, and is provided with means for automatically proportioning the air and liquid supply. In one form the atomizer is mounted on trunnions 1 through which air and liquid are supplied, these trunnions being provided with discs 2 provided with openings 4 which for a limited angular distance communicate with ports 5 at the end of the supply pipes, the arrangement being such that air is admitted before the liquid supply is opened and that the ports automatically the fluids until both ports are fully opened when the ratio remains constant. The apparatus may be arranged so that normally gravity or a spring directs the nozzle so that the supply is cut off, and the nozzle may be drawn downwards by a cord, and on its release return to its normal inoperative position. When a spray-producer as described in Specification 177,817 is used in which a piston or diaphragm is actuated by gas pressure to open or close a needle valve in the liquid orifice thus automatically proportioning the fluid supply, the regulation at the trunnions may be omitted.
Patent GB-916222-A (GB)
Title: Automatic equipment for the control of a nuclear reactor
Inventor: KOVANIC PAVEL
IPC: G21C7/00
Filed: 1959-02-17
Abstract: 916,222. Controlling reactors. ZAVODY V.I. LENINA PLZEN, NARODNI PODNIK. Feb. 17, 1959 [Feb. 18, 1958], No. 5406/59. Class 39 (4). A reactor 1 is automatically controlled by movement of control elements driven by servomotors 3 on receipt of signals at 2 from a reference circuit 7, wherein the output from a movable radiation detecting element 4 is compared with an input signal from 6. The detecting element 4 may continue to move under the control of a signal from 9 passed to a servomotor 5 until a desired reactivity is achieved. After attaining this output a signal from 11 may interrupt a circuit at 6 to stop further movement of the sensitive element 4. The equipment described may perform the functions firstly of a meter of the multiplication factor, secondly of a period meter, thirdly of an automatic period regulator with a movable detecting element, and fourthly of an automatic regulator of constant output with a stationary detecting element.
Patent GB-264681-A (GB)
Title: Improved metal-spinning tool
IPC: B21D22/14
Filed: 1926-02-26
Abstract: 264,681. Adie Bros., Ltd., and Alderson, J. P. Feb. 26, 1926. Spinning.-A tool for spinning metal comprises a handle a provided with a forked end a<2>, a<3> in which the rubbing- tool c<2> is slidably but non- rotatably mounted by means of a square &c. shank c<3> on the tool engaging a corresponding hole in the part a<2>. A spring d mounted between the part a<2> and a transverse pin e through the tool shank constitutes a resilient mounting for the rubbing tool. One of the ends a<3> of the handle may be detachably mounted so that the rubbing tools of various patterns may be employed with a single handle.
Patent GB-1042365-A (GB)
Title: The production of adiponitrile
Filed: 1964-02-10
Abstract: Adiponitrile is produced continuously by reacting adipic acid and excess ammonia in the liquid phase at 240-320 DEG  C. in contact with a phosphorus-containing acid catalyst and also in the presence of a diluent which is one or more of the products of reaction between adipic acid and ammonia.  The diluent is preferably recycled to the reactor from a later stage in the process and may be, for example, adiponitrile, a mixture of adiponitrile with one or more intermediate products of the reaction or the intermediate products of the reaction. Suitable catalysts are, for example, diammonium phosphate, alkyl phosphates and aryl phosphates.
Patent GB-180407-A (GB)
Title: Improvements in or relating to anti-glare devices
IPC: F21V5/00
Filed: 1921-02-17
Abstract: 180,407. Court, J. R., and Hutchins, A. C., (Kill-Glare Lens Co.). Feb. 17, 1921. Lenses.-An anti-glare lamp-glass for motor head-lights &c. comprises a plurality of prisms arranged one above the other, each extending across the whole width of the glass with its apex upwards, the projecting steps formed by the prisms being all on one face of the glass, the other face being plain. In one form, the glass is made in one piece and three prisms are'used, each having a different angle; the uppermost prism 5 covers approximately half the glass and has the least angle, the next 6 covers one-quarter of the glass, and the lowermost 7 covers the bottom portion and has the greatest angle. The prisms are made concave about a vertical axis to spread the beam laterally; this concavity may be continued about an horizontal axis. Each prism has extending from the middle of its base upwards an inverted V-shaped recess 8, which is also V-shaped in crosssection, the faces of the recess being ribbed horizontally to diffuse the light and the recess on the lowermost prism being smallest in size and that on the uppermost prism greatest. A lip 9 which may be ribbed radially surrounds the glass for engagement with the bezel of the lamp. Reference has been directed by the Comptroller to Specifications 28187/08, 111,041, 119,035. 145,498, and 156,729.
Patent GB-633542-A (GB)
Title: Improvements relating to spring frames for motor cycles
IPC: B62K25/28
Filed: 1948-02-25
Abstract: 633,542. Hydraulic shock-absorbers. ENFIELD CYCLE CO., Ltd., and PARDOE, E. O. Feb. 25, 1948, No. 5540. [Class 108 (iii)] [Also in Group XXXI] A hydraulic shock absorber comprises a telescopic member having inner and outer sections 19, 19a respectively between which a helical spring 20 is mounted. An oil damping device is provided comprising concentric sleeves 23, 24 associated with the tubes. 19a, 19 respectively, oil inlets 28, 29 being provided. The sleeve 23 is provided with a piston member 26 with an oil resisting washer sealing the junction between the sleeves 23, 24. A tubulous 27 is provided having a tapering part along its length but of uniform diameter at its upper end where it operates with a suitable clearance constituting a metering orifice in the piston member 26 which suffices for hydraulic damping on normal surfaces. If severe bumps are encountered the tapered portion of the tubulous nearly closes the orifice and the amount of damping is considerably increased.
Patent GB-1204587-A (GB)
Title: Stack climbing systems
Inventor: JONES ROBERT HENRY
IPC: E04G3/32
Filed: 1968-02-03
Abstract: 1,204,587. Winches; platform elevators. R. H. JONES. 27 Jan., 1969 [3 Feb., 1968], No. 5583/68. Headings B8B and B8H. [Also in Division E1] Equipment for climbing, e.g. a chimney stack for use e.g. in building such a stack, comprises two pneumatically-tyred load carrying vehicles 1, 2 connected together around the periphery of the stack by cables 6 maintained under tension by winches on the vehicles, and connected, between the vehicles, to an opposed pair of idler bogeys 7. Each vehicle has two electric motors, one mechanically coupled to one or both of two axles carrying the wheels, and the other coupled to the winch, the traction motors and the winch motors of each vehicles being connected in parallel. The winch motors may be. controlled manually or automatically via switches 48, 49 operated by deflection of a leaf spring 30 attached to upper sub-frame 28. Float switches for the traction motors on each vehicle have an hydraulic interconnection whereby if one vehicle climbs above, or drops below the other on ascending or descending, respectively, its motor is cut out, and a brake automatically applied. A further motor to operate a cable reel 51 may also be provided
Patent GB-948301-A (GB)
Title: Improvements in or relating to the manufacture of optical glass
Inventor: DAVY JOHN RUPERT
IPC: C03B5/225
Filed: 1959-02-18
Abstract: Optical glass is manufactured and purified by founding the glass from calcium oxide, aluminium oxide, and one or more of the modifiers silicon dioxide, magnesium oxide, and barium oxide, and heating under vacuum at a pressure such that impurities are evaporated and loss of glass-forming constituents and modifiers is eliminated or reduced. Purification may take place at 1100-1750 DEG  C. at a pressure of 0.01 to 200 microns of mercury. Impurities referred to are water vapour, carbon dioxide, oxygen, nitrogen, sulphur dioxide, and sodium and potassium oxides.  Preferably, the glass-forming constituents and modifiers are combined in proportions which form a eutectic. In examples, the constituents are calcined, mixed, made into a paste with water, and founded in a platinum crucible at 1500 DEG C.; the glass is poured on to a cooled slab and the broken pieces heated in a graphite crucible under vacuum at a temperature rising to 1650-1750 DEG  C.  The Provisional Specification mentions as modifiers the compounds germanium oxide, calcium fluoride, and barium fluoride, and gives an additional example in which the modifier contains calcium fluoride.