baber/WOPTO huggingface dataset:
Patent GB-579444-A (GB)
Title: Control circuits for rectifiers
IPC: H02K33/00
Filed: 1944-04-06
Abstract: 579,444. Converting. HINKSMAN, E. A. April 6, 1944, No. 6491. [Class 38 (ii)] In a rectifier circuit supplying a highly inductive circuit, means is provided for decreasing the magnitude of the rectifier current without substantially increasing the reverse voltage by having a shunt connection across the rectifier. If a half-wave rectifier 5 is supplying an electromagnetic vibrator 6, the magnitude of the unidirectional pulsating component of the current may be varied by a variable resistance 8 shunted across the rectifier 5 which allows an A.C. component to flow through the vibrator 6, and with this arrangement the back voltage across the rectifier does not increase with decrease in magnitude of the uni-directional pulses as is the case when control is effected with a variable resistance in series with the rectifier. Alternative' circuits are described in which one side of the rectifier is connected to the movable arm of a variable resistance so that a shunt resistance increases as a series resistance decreases, and in which in a similar arrangement an inductance is connected in parallel with the series resistance.
Patent GB-646779-A (GB)
Title: Improvements relating to beam-deflecting circuits for cathode ray tubes
IPC: H03K4/28
Filed: 1947-03-08
Abstract: 646,779. Saw-tooth generating circuits. RADIO CORPORATION OF AMERICA. March 8, 1947, No. 6545. Convention date, March 9, 1946. [Class 40 (vi)] In a magnetic deflecting circuit for a C.R. tube, used in television apparatus, in which a damping valve is used to suppress undesired H.F. oscillations, a voltage derived from the saw-tooth current has its wave-shape altered and is applied to the damping valve to improve the linearity of the sawtooth current. The Figure shows a deflecting circuit for a C.R. tube 26 in which a voltage 12 applied to valve 10 generates a saw-tooth current in the deflecting coils 14. Undesired H.F. oscillations occurring at the end of the forward trace are suppressed by the damping valve 40 and the network 42, 52. The non-linearity of the forward trace introduced by the damping circuits is compensated for by applying a voltage derived from the transformer winding 18 and phase-shifted by the network 58, 60 to the cathode of the diode 40. Inductor 60 may be permeability tuned to enable the wave-shape of the linearizing voltage to be adjusted. In a modification, Fig. 4 (not shown), the inductor 60 of Fig. 1 is fixed and the wave-shape is varied by means of two variable inductors connected in series with each of capacitors 42, 58. In a further modification, Fig. 5 (not shown), the cathode of the damping valve and the lead to the scanning transformer are connected to tappings on the inductor 60.
Patent GB-452926-A (GB)
Title: Improvements in or relating to runners for curtain railways
IPC: A47H5/032
Filed: 1935-03-01
Abstract: 452,926. Curtain runners. HUDSON, L. G., 117, Curtain Road, London. March 1, 1935, No. 6550. [Class 52 (v)] Curtain master runners of the kind adapted to run in a slotted trough and be clamped to the drawcord g, which passes through a horizontal hole f in the runner, by a set screw h have lateral grooves e formed in the body of the runner adapted to run on the edges of the slot c so that the weight of the curtain is distributed evenly between both edges of the slot. The edges of the slot c in the box-shaped trough a are rounded to form runways and the runners have eyelets j for the curtain hooks. Pulley devices k, each comprising a square base from which project lugs forming bearings for, the pulleys, are secured in the ends of the trough by eyelets s and guide the cord g, the pair of pulleys n being separated by a wall p. In a modification a cylindrical runner is provided with an annular groove to engage the edges of the slot. Specification 23295/00, [Class 52], is referred to.
Patent GB-742667-A (GB)
Title: Improvements in or relating to production of polysulfides
IPC: C01F7/70
Filed: 1953-03-10
Abstract: Polysulphides are produced by heating a sulphate, a sulphide selected from the group consisting of ammonium sulphide, hydrogen sulphide, alkali metal and alkaline earth metal sulphides, and water to a temperature above 550 DEG F., preferably 600 DEG -700 DEG F. under a pressure sufficient to maintain part of the water in liquid phase. Sulphates specified are ammonium, potassium, sodium, barium, calcium, magnesium, and aluminium sulphate.  Sulphur may be produced from ammonium polysulphide by depressuring a product obtained as above, ammonium sulphide being removed overhead, oxidised to ammonium sulphate and returned to the process.  Alternatively the ammonium polysulphide may be treated with sulphuric acid, part of the hydrogen sulphide evolved being oxidised to sulphuric acid and the remainder used for the production of further ammonium polysulphide. Specifications 6122/06 and 289,639 [both in Class 90] are referred to.
Patent GB-1079443-A (GB)
Title: Improvements in electric discharge lamps
Inventor: WELLS ROBERT STIRLING
IPC: H01J61/72
Filed: 1963-02-19
Abstract: 1,079,443. Discharge lamps. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Feb. 18, 1964 [Feb. 19, 1963], No. 6685/63. Heading H1D. [Also in Division F4] A region of the vitreous envelope of a metal vapour discharge lamp is in heat transfer relationship with a radiator surface through a quantity of fusible material, the melting point of which is such that during lamp operation some of the fusible material melts, and the envelope region is maintained at a temperature producing a desired vapour pressure within the lamp. The fusible material 6 may be a paraffin wax, or polyethylene glycol melting at about 42‹ C., and, as shown, is contained in an annular metal channel 7 sealed to the envelope of a lowpressure, mercury vapour fluorescent lamp by thermally-insulating rings 9 of rubber or plastics material. Alternatively, the fusible material may be contained in metal end cap 5, which may be joined to or formed integrally with an annular metal channel also containing fusible material. The outer surface of the channel or cap forming the radiator surface may be corrugated to increase heat dissipation. A cooling arrangement may be provided at each end of the lamp, and the ends of the glass envelope may be of reduced diameter to accommodate channels 7. In an alternative arrangement, the fusible material is contained in a cup-shaped radiator, and is in heat transfer relationship with the lamp envelope via a copper rod, contacting the lamp envelope and projecting into the fusible material but spaced from the radiator, Fig. 6 (not shown). In this case, the copper rod may be glued to the lamp envelope, or the cooling arrangement may form part of a lamp fitting, the copper rod being spring-biased into contact with the lamp envelope, Fig. 8 (not shown).
Patent GB-833325-A (GB)
Title: Coupling internal combustion engines to driven units
Inventor: HALLEWELL GEORGE
IPC: F02D25/00
Filed: 1955-03-07
Abstract: 833,325. Driving-bearing; power plant. BLACKSTONE & CO. Ltd. March 6,1956 [March 7, 1955], No. 6695/55. Class 7(2) Pinions G1, G2 meshing a common output gear G3 are powered by respective banks of a twin-bank engine or engines E via flywheels F1 on the bank crankshafts and incorporating torsionally damped flexible couplings C1 which are as disclosed in Specification 692,954. The gear G3 drives a dynamo D, either directly via its shaft S or, if the dynamo is beneath one of the engines E, via a meshing gear on the shaft S. A reversing gear may be provided between the gear G3 and the dynamo D.
Patent GB-1420023-A (GB)
Title: Method of and apparatus for generating a gas cushion
IPC: B65H20/10
Filed: 1973-02-12
Abstract: 1420023 Conveying sheet material by gas cushion SAINT-GOBAIN INDUSTRIES 12 Feb 1973 [10 Feb 1972] 6698/73 Headings B8A and B8R [Also in Division C1] Sheet or strip material is carried from above by a gaseous cushion generator which has intake orifices connected to a supply of gas at higher than ambient pressure and discharge orifices such that at least at a peripheral zone stabilizing zones in the vicinity of the intake orifices alternate with carrying zones in the vicinity of the discharge orifices. In the Figure, material 3 is supported by a cushion generator comprising at least one panel 1 having intake orifices 5 connected to a supply of gas under pressure through chambers 9 and discharge orifices 4 connected to a suction source through chambers 8. Each orifice is supplied with a plug 15 defining a passage for the gas.
Patent GB-608828-A (GB)
Title: Improvements in or relating to beer pipe fittings, more particularly to draw-off taps
IPC: B67D3/04
Filed: 1946-03-05
Abstract: 608,828. Valve casings. GILL, W. E. March 5, 1946, No. 6798. [Class 135] [Also in XVIII] A liquid - dispensing pipe fitting, in which a check valve is housed in a cylindrical casing 1 having an inlet pipe 5 and connected to an outlet nozzle 3 by an inclined passage 4, is provided with removable caps 7, 11, covering the cylindrical casing 1 and an oval cleaning eye 12 at the upper end of the nozzle 3, respectively, thus facilitating cleaning of the interior of the fitting.
Patent GB-471491-A (GB)
Title: Improvements relating to the manufacture of articles from synthetic resin or like mouldable material
IPC: B29D1/00
Filed: 1936-03-06
Abstract: 471,491. Moulding screw threaded articles. HOPF, P. A. March 6, 1936, No. 6858. [Class 87 (ii)] Articles having a screw thread are moulded from artificial resins or other material by means of a tool comprising relatively movable parts, one of which carries the screw thread while another has one or more inclined projections which form corresponding projections on the moulded article and co-operate therewith to start unscrewing the article from the threaded part of the tool when the parts are separated. As shown, the part 1 carries a threaded male member 1<1> and the female part 2 has a ring of inclined ridges 21 which produce milling 31 on the article 3 and cause the cap 3 to start unscrewing from the part 11. Either externally or internally threaded articles may be produced such as containers for face powder or shaving soap or caps or lids for such containers.
Patent GB-678207-A (GB)
Title: Improvements in or relating to methods of making picking sticks for looms
IPC: D03D49/38
Filed: 1948-03-05
Abstract: 678,207. Composite wood rods. BUHLER, O. March 5, 1948, No. 6922/48. Class 145 (ii). [Also in Group IX] The impact zone of a picking stick for a loom is impregnated with a hardening medium such as synthetic resin. The stick may be of laminated form in which strips of wood are formed with a series of interdigitated teeth secured together at their points of contact by setting adhesive. In one form, an originally rectangular wooden bar 3 has oppositely disposed teeth 4, 5 formed on each of two longer sides by milling. Two wooden strips 7, 8 having corresponding teeth 6 are secured to the bar 3 by glue or the like. The strips 7, 8 may be formed by dividing a bar such as bar 3 into two halves. Portions 10 are preferably cut away leaving only the teeth 6 secured to the bar 3. Alternatively two strips only may be used, their teeth being directly engaged and secured by adhesive. The teeth 4, 5 may be staggered relatively to one another.
Patent GB-1047057-A (GB)
Title: Improvements in or relating to dielectric materials
IPC: C04B41/87
Filed: 1964-02-19
Abstract: A valency controlled or reduced barium titanate (the terms are explained) semi-conductor, or its solid solution with their titanates is coated or impregnated with one or more elements or compounds and baked to form an insulating layer on the crystal grain boundary. Specified materials are the elements V; Cr; Mu; Fe; Co; Ni; Cu; As; Sb; Bi; Tl; Ag; Sn; Si; their oxides; K2\Cr2\O7 and Ba MuO4.  Valency controlling is by adding small amounts of Nb2O5, Ta2O5, ClO2, La2O3 and Nd2\O3.
Patent GB-164487-A (GB)
Title: Improvements in theft and like alarms particularly applicable to automobiles
IPC: B60R25/04
Filed: 1920-03-08
Abstract: 164,487. Marsh, S. P., and Marsh, E. E. March 8, 1920 Fluid supply for whistles.-An audible alarm for indicating theft or unauthorized use of an automobile comprises a whistle supplied with air from pumps operated by the driving-mechanism of the vehicle through a clutch which can be set by a key lock, the device being housed in a casing. As described, the device is driven from the differential gear, and is enclosed in a modified gear casing. In the form shown in Figs. 2 and 5, the whistle 40 is supplied with air through pipes 37, 38 from a pump comprising two opposed cylinders 18 in which work pistons 28 connected by a member 29 having a transverse slot engaged by a crank 24 which reciprocates the pistons. A wheel 23 driven by the bevel 3 of the differential gear runs freely on the shaft 25 of the crank 24 and drives a slidable member having a squared portion 45. This member has clutch teeth 47 which can be moved into engagement with corresponding teeth on the shaft 25 by means of a pivoted lever 53 urged by a spring 52. The lever is held in the disengaged position for normal running by the bolt 60 of a lock operated by a key 59. The gear casing has small perforations 61 to allow free escape of the sound, placed sufficiently high to prevent undue loss of oil from the casing. In the form shown in Fig. 7, the perforations form an overflow which prevents closing of the whistle slots 43 by oil, and the inlet end of the lower cylinder has a tube 70 the free end of which is above the perforations 61 to prevent ingress of oil.
Patent GB-908345-A (GB)
Title: Portable fire extinguishers
Inventor: BROWN DENIS SELBY
IPC: A62C13/00
Filed: 1959-02-27
Abstract: 908,345. Pressure-type fire extinguishers. NATIONAL FIRE PROTECTION CO. Ltd. Feb. 27, 1959, No. 7006/59. Class 47. A pressure type extinguisher has a pistol grip handle 12 incorporating a cartridge 13 of compressed gas which can be urged against a puncturing member 17 to release the gas by a trigger 24. Fire-extinghishing material is contained in a detachable container 11.
Patent GB-253585-A (GB)
Title: Improvements in and relating to cigarette making machines
IPC: A24C5/18
Filed: 1925-03-16
Abstract: 253,585. Marks, E. C. R., (American Machine & Foundry Co.). March 16, 1925. Cigarette - making machines.-In a continuous-rod machine adapted to produce two parallel cigarette-rods, the hopper 6, Fig. 2<a>, is of double width and is provided with two tobacco shoots 7, 7a, one for each rod. The feeding mechanisms in the two halves of the hopper 6 are driven independently from the main shaft 25 through chain and sprocket mechanism 19 - - 22 and shafts 15, 16, the sprockets 21, 22 being connected to the shafts 15, 16 by clutches 17, 18. The movable members of the clutches 17 18 are actuated respectively by levers 125, 48 connected by pairs of levers with axially slidable rods 34, 57. As shown in Fig. 1, duplicate rod formers 9, 9<a>, pasting-apparatus 10, 1O<a>, sealing apparatus 11, 11<a>, and rod-guides 12, 12<a> of ordin. ary construction are provided. A rotary-disc cutter 81 of known construction and driven from shaft 25 is adapted to sever both rods simultaneously. Of the belt pulleys 42, 68, the pulley 42 is driven by a shaft 41 connected to the main shaft 25 by a worm and worm wheel gearing 44 through a gear box 102, the drive being through a clutch 40 the movable member of which is actuated by a bell-crank lever 35 from the rod 34; the pulley 68 is driven by a tubular shaft 67 surrounding the shaft 41, and driven therefrom through gearing 65 and a countershaft 64, a clutch 63 operated' by a bell-crank lever 59 from the rod 57 being provided on this shaft. The rods 34, 57 are actuated respectively by levers 45, 70 having handles 47, 72. The pasting mechanisms 10, 10<a> are driven through gearing from the shaft 25 and are connected to their driving shafts through clutches actuated by levers 74, 77.
Patent GB-417850-A (GB)
Title: Braun tube
IPC: H01J29/52
Filed: 1933-03-09
Abstract: 417,850. Cathode ray tubes. RADIOAKT.-GES.,D. S. LOEWE, 10, Wiesenweg, Steglitz, and SCHLESINGER, K., 39, Friedrichstrasse, Friedrichshagen, both in Berlin. March 9, 1933, Nos. 7117/33, 18362/34, 18363/34, and 18364/34. Convention dates, March 10, 1932, March 18, 1932, March 24, 1932, and April 4, 1932. [Class 39 (i).] A Braun tube, which may be gas-filled, comprises an indirectly-heated cathode 16, Fig. 3, and a control grid 26, which consists of a perforated diaphragm and is arranged at a distance not greater than 2 mms. from the cathode, both electrodes being located within a Wehnelt cylinder 3. A screening and concentrating grid 21 may be arranged near the control grid and is provided with a cylindrical member which surrounds the control grid. In a modification, the control grid consists of a cylinder 1, Fig. 4, provided with a tubular abutment 7 or with a meshed grid fitted in the opening for the ray. An indirectly-heated cathode consists of an electron-emitting metal or oxide coating 6 on a coating 5 on an insulating tube 3 which is secured within the cylinder by means of an insulating plate 2. A heater 4 is energized from a battery 9. The cylinder may have a positive potential of 10 to 60 volts with respect to the cathode, which may be furnished with a plane convex or concave electron-emitting surface. The invention is applicable to the construction of Braun tube described in Specification 420,667. An electron optical system comprising an anode, having a tubular abutment, and a plate-shaped electrode, and a getter or a hydride to maintain the gas pressure may be provided as described in Specification 417,713. The Specification as open to inspection under Sect. 91 states also that the tube may be provided with insulating or metallic members for screening the cathode ray from the highvoltage leads as described in Specification 420,876. The cathode may be located within a container, closed with the exception of an opening for the ray, and is provided with an electron-emitting coating by the generation of metallic vapour from a substance located within the container as described in Specification 417,714. An auxiliary electrode in the form of an internal coating may be provided. This subject-matter does not appear in the Specification as accepted.
Patent GB-512619-A (GB)
Title: Improvements in or relating to aeroplanes
IPC: B64C39/04
Filed: 1938-03-07
Abstract: 512,619. Aeroplanes. ROBERT, R. March 7, 1938, No. 7130. Convention date, March 8, 1937, [Class 4] - An aeroplane comprises propelling means 1, Fig. 1, disposed centrally at the rear of the main supporting surface 3 between two longitudinal girders 8, 9, and tail planes 4, 5 having control surfaces 6, 7, are secured to the ends, of the girders and solely on the sides remote from the control longitudinal axis: The control surfaces may be turned through equal or unequal angles in the same or in opposite directions by the device shown in Fig. 6, the surfaces being connected by cables 14, 15 to shafts 16, 17, keyed to which are bevel gears 18, 19 in mesh with a bevel gear 20, integral with a lever 22 and rotatably mounted in a strap 21 rotatable on the shafts. The tail surfaces may be connected by a transverse girder 10, Fig. 2, to relieve the girders 8, 9 of torsional stress, and this girder may be enclosed in a streamlined envelope which may be movable or provided with a movable flap or flaps 11, Fig. 3, to trim the machine. In another form, Fig. 5.. the envelope 10<1> is provided with flaps 12, 13: which may be opened out to increase the drag: of the machine.
Patent GB-557316-A (GB)
Title: Improvements in or relating to hydraulic control devices
IPC: B64C11/42
Filed: 1940-04-19
Abstract: 557,316. Fluid-pressure servomotor-control systems ; variable pitch propellers. UNITED AIRCRAFT CORPORATION. April 19, 1940, No. 7136. Convention date, May 25, 1939. [Class 135] [Also in Group XXXIII] A hydraulic control system for adjusting the pitch of screw propellers which is of the kind described in Specification 526,100 in which the propeller blades 18 are adjusted by bevel gears 20, 22 operated by a hydraulic motor 24 the piston 28 of which is subjected at one end to fluid pressure e.g. the pressure of the oil lubricating system and at its other end to a higher pressure is constructed with a booster pump 44 which delivers oil at a higher pressure than the pressure produced by the lubricating oil pump 30, the excess pressure being controlled and kept constant by a spring-controlled relief valve 48 which delivers oil to a chamber 46 from which it can pass to the motor 24 or to exhaust through a conduit 72, according to the setting of a valve 56 which is under the control of a speed-responsive governor 58. If the engine speed is too high the valve 56 directs the high pressure oil to passages 60, 62, 64, 66 to the motor, and the piston is moved to raise the pitch of the propeller and lower the speed of the engine. At low speeds the oil is byepassed to the sump and the pitch its reduced so as to increase the speed of the engine. The valve 48 is constructed as shown in Fig. 2 of a cylindrical valve chamber 84 connected by a pipe 52 back to the inlet of the booster pump. In the chamber 84 is a sliding member 80 with an apertured reduced part 86 sliding in the chamber 46 and arranged to slide over a hollow cylinder 94 attached to an adjustable closing screw 96. A spring 82 normally keeps the valve closed, but at a predetermined pressure the valve opens to permit excess oil to pass through an aperture 90 to the passage 52.
Patent GB-470113-A (GB)
Title: Improvements in typewriter carbon sheets and attachments
IPC: B41J17/00
Filed: 1936-03-10
Abstract: 470,113. Typewriters. THOMSON, E. W. M. March 10, 1936, No. 7161. [Class 100 (iv)] Carbon-sheet arrangements.-In a continuous billing attachment for typewriters using travelling work webs and one or more carbon sheets comprising a support for the web laterally movable with and behind the platen, keepers on the support, and means on the carbon sheet adapted to engage the keepers when the sheet is moved back with the work webs and to hold the sheet against forward movement with the webs, the keeper-engaging means on the carbon sheet are formed as shoulders, and the keepers are spring-pressed normally-projected hooks positioned for engagement with the shoulders. The support frame 10, Fig. 1, is secured by two forked members 5, provided with locking- hooks and clamping-screws, to a cross-bar 3 of the machine and carries a cross-bar 9a, which is slidable on the frame members 10 and carries a leaf spring 12 to engage in notches in the members 10. Mounted on the bar 9a is a shaft 14, carrying hooks 15 projecting through holes 16 in the bar. The hooks are normally projected by a coil spring or by gravity, but may be retracted by a hand lever 19. The carbon sheets 24, Fig. 3, and a moderately stiff cover sheet 30 are secured by dome fasteners 26, preferably on side tabs 25, to a stiff strip 22, provided with eyelets 23 to engage over the hooks 15. For use with fan-folded forms the carbon sheets are carried by stiff strips, each secured at one end only by two fasteners to the strip 22. The web is passed over the frame between adjustable side guides 20 and interleaved with the carbon pack. When one form has been completely typed the platen is reversely rotated and the eyelets ride up and engage with the hooks 15. The next form can then be drawn forward and the carbon pack released by the operation of the levers 19. A cam shaped member 31 secured to each lever pushes the carbon pack downwards as the hooks are withdrawn so that there can be no re-engagement. Single carbon sheets with stiffened top edges may be used instead of packs. Worn portions of the carbon sheets may be torn off and the bar 9a readjusted. The support frame may run on tracks behind the carriage and be connected thereto. Specification 378,128 is referred to.