baber/WOPTO huggingface dataset:
Patent GB-452578-A (GB)
Title: Improvements in autotype copying processes
IPC: G03F5/12
Filed: 1935-02-25
Abstract: 452,578. Autotype copying processes. GROVES, W. W., 30, Southampton Buildings, Chancery Lane, London.-(I. G. Farbenindustrie Akt.-Ges.; Frankfort-on-Main, Germany) Feb. 25, 1935, No. 5954. Drawings to Specification. [Class 98 (ii)] In producing half-tone pictures for use in autotype processes, a half-tone screen is used in the camera or during copying or contact printing in conjunction with a diaphragm consisting of annular zones of different light transmission having a maximum of transmission at the centre and a second maximum displaced towards the periphery. A diaphragm as described in Specification 452,647, consisting of concentric rings of different transparency or of a number of apertures of different sizes arranged in concentric rings, may be used. The half-tone screen may have apertures in the form of 3- or 4-point stars in cross screen or diagonal arrangement as described in Specification 452,648. In contact printing an illuminated diffusing screen may be employed as light source.
Patent GB-421305-A (GB)
Title: Improvements in or relating to the manufacture of rubber films
IPC: B29C37/00
Filed: 1934-02-24
Abstract: In the manufacture of rubber films by deposition on a former, removal is facilitated by subjecting the surface of the rubber in contact with the former to the action of one or more oxidizing and/or halogenating agents.  The former may be treated with the oxidizing &c. agent before deposition, or the oxidizing agent may be applied after the first dip before drying, or the first film may be made from a rubber dispersion or solution containing the oxidizing agent.  If an aqueous dispersion of rubber is to be applied, the former is preferably treated with an oxidizing or halogenating agent in water; if an organic solution is employed, the oxidizing &c. agent should be dissolved in an organic solvent. Coagulants may be added to the oxidizing agent, or the agent itself may act as a coagulant.  Wetting agents may be employed. Oxidizing or halogenating agents specified are a 2-5 per cent solution of chlorine, bromine, or sulphur chloride in carbon tetrachloride, magnesium, calcium, barium, or potassium permanganate, potassium or sodium hypochlorite or dichromate, ammonium persulphate, hydrogen peroxide, chlorine, bromine, or iodine water, benzoyl peroxide in ethyl alcohol.
Patent GB-1197418-A (GB)
Title: Data Storage Apparatus
Inventor: AUSTIN PHILIP CHARLES
IPC: G06F12/16
Filed: 1969-02-05
Abstract: 1,197,418. Data storage. INTERNATIONAL BUSINESS MACHINES CORP. 5 Feb., 1969. No. 6114/69. Heading G4C. Data storage apparatus has a first store portion storing words of m1 data bits and n1 error correction code bits and a second store portion storing words of m2 data bits and n2 error correction code bits, where m1 > m2 and n1 # n2, and means for correcting an error or a predetermined number of errors in the data bits of an accessed word. Each store portion has a plurality of integratedcircuit storage modules, each module storing a corresponding bit (or bits) of each word in the portion. A common address register selects a store portion (of which there may be more than two) and a word in it, the word being placed in a register, a data byte or bytes of the word being gated, with correction by bit inversion under control of the error correction code bits, to an output bus, the byte or bytes being selected by the address register. Gating to the bus may precede completion of the error checking in which case the uncorrected data sent is ignored if correction is necessary, the corrected data being sent after a delay. A parity bit is generated to accompany each byte on the bus.
Patent GB-1059546-A (GB)
Title: Optimum non-linear control system for servo-mechanisms
IPC: G05D3/16
Filed: 1964-02-13
Abstract: 1,059,546. Automatic control. HITACHI SEISAKUSHO KABUSHIKI KAISHA. Feb. 13, 1964 [Feb. 15, 1963], No.6130/64. Heading G3R. In an error-actuated servo-system for controlling a variable involving a servo-drive having load inertia variations, a control term is introduced in dependence on the product of angular momentum of the servo-drive and the derivative of the controlled variable. As described, a servomotor and its load, e.g. a crane, are controlled by a switching device which may be a relay or a saturable amplifier which is, in turn, controlled by (a) an electrical error signal representing the difference between a controlled variable and its desired value and (b) an electrical feedback signal, obtained by applying a signal representative of the momentum of the servomotor and its load through a non-linear device. Signal (b) is computed by applying a signal representative of servomotor torque, through an integrator and multiplying its absolute value by a signal representative of the rate of change of the controlled variable. To eliminate signal (b) unless the controlled variable is changing at a sufficient rate, a relay responsive to the product of the absolute value of the rate of change and the error signal, short circuits the integrator. The electrical signal representative of servomotor torque may either be produced by a transducer responsive to the torque or computed from the product of the servomotor control signal and the rate of change of the controlled variable.
Patent GB-592866-A (GB)
Title: Improvements in or relating to building erection methods
IPC: E04B2/28
Filed: 1945-03-10
Abstract: 592,866. Cavity walls. JANNEL, J. March 10, 1945, No. 6179. Convention date, Nov. 7, 1942. Class 20(iv)] A building method consists in erecting two parallel walls 1 and 2, bracing them at intervals by cross-brick pillars 4 formed of ordinary bricks to provide a series of chambers 3 in which the air is stagnant and thereby enhancing the insulation between the inside and outside of the building.
Patent GB-355694-A (GB)
Title: Improvements in the preparation of calcium sulphate
IPC: C01F11/46
Filed: 1930-02-25
Abstract: A finely divided and apparently amorphous form of anhydrous calcium sulphate is obtained by treating the anhydrous salt, obtained, for instance, by heating the hydrated form at or below 200 DEG  C., with sulphuric acid at a suitable strength, but insufficient to cause the formation of calcium bisulphate.  For example, the hot dehydrated compound may be mixed with sulphuric acid of 1,2 specific gravity at 100 DEG  C., in quantity sufficient to provide 4-5 grams SO3 to each 100 grams anhydrous calcium sulphate.  This temperature is maintained until conversion is complete, when the product is washed and dried, or dried and calcined.  Alternatively, the dehydrated and cooled calcium sulphate may be moistened with cold sulphuric acid of 1,4-1,7 specific gravity and the mass, after conversion, is washed and dried, or dried and calcined.  According to the Provisional Specification, sulphuric acid in any of its forms, or acid sulphates such as titanium sulphate, or phosphoric acid may be used as the disintegrating agent.  Specification 319,228, [Class 1 (iii), Oxides &c. Metallic], is referred to.
Patent GB-789927-A (GB)
Title: Improvements relating to slow wave structures
Inventor: JR GARLAND MARION BRANCH
IPC: H01J23/30
Filed: 1956-02-28
Abstract: 789,927. Travelling wave tubes. GENERAL ELECTRIC CO. Feb. 28, 1956, No. 6184/56. Class 39(1). [Also in Group XL(b)] An arrangement for electromagnetically coupling two coaxial helical slow wave structures spaced apart along their common axis and wound in the same sense comprises a coupling helix coaxial with the structures and wound in the opposite sense and extending between and overlapping each of the two structures for such an axial length as to cause the effective transfer of the electromagnetic energy in one structure to the other structure. As shown, a travelling wave tube comprising an electron gun 10, collector 19 and solenoid 21, is provided with two helices 23, 28 separated by a gap 26, the first helix 23 being maintained at the same potential as that of the accelerating anode of the gun 10 and the second helix 28 at a slightly higher potential. The two helices are electromagnetically coupled by a helix 32 wound with the same pitch angle but in the opposite sense to that of helices 23, 28 and overlaps each of the adjacent ends of the two helices by one quarter of a beat wave length. Undesired frequencies are attenuated by a high loss coating 34 and the unwanted backward wave at the operating frequency by rods 34<SP>1</SP> of lossy material. A drift tube may be provided between the two helices 23, 28. Coupling helices may also be used to feed energy to, and to extract energy from, the travelling wave tube. Instead of a physical gap between the two helices 23, 28, a single helix may be provided with a centre section coated with lossy material so as to form an effective gap for radio frequency currents.
Patent GB-818106-A (GB)
Title: Improvements in or relating to cathode ray tubes
Inventor: WOLFE RAYMOND
IPC: H01J31/12
Filed: 1957-02-25
Abstract: 818,106. Electroluminescence; cathode-ray tubes. GENERAL ELECTRIC CO. Ltd. Feb. 25, 1958 [Feb. 25, 1957], No. 6272/57. Class 39(1). A storage cathode ray tube includes a display screen comprising, in sequence, a first electrically conducting layer 6, Fig. 1, an electroluminescent layer 7, a photoconductive layer 8 and a second conducting layer 9, an alternating voltage being applied to the layers 6, 9 so that the regions of the electroluminescent layer and of the photoconductive layer operate as electrooptical pairs with two stable equilibrium conditions, the screen also including a cathodoluminescent layer 10 excitable to luminescence by the electron beam of the tube so that radiation from any excited region of the layer 10 is incident on a corresponding region of the photoconductive layer and is capable of triggering off the electro-optical pair from the first to the second stable condition. A radiation image formed on the cathodoluminescent layer 10 is thereby reproduced as a luminous display image on the electroluminescent layer 7 and this image is retained by feed-back between the layers 7, 8 after the disappearance of the radiation image. The image on the layer 7 may be extinguished by reducing the alternating voltage across layers 6, 9. In an alternative construction the photoconductive layer consists of a thin insulating layer 14, Fig. 2, formed with a multiplicity of small holes 15, the wall surfaces 18 of which are coated by photoconductive material, the electroluminescent layer 19 extending over one surface of the insulating layer and the layers 14, 19 are sandwiched between two light transmitting conducting layers 16, 20. Conducting elements 17 are located between the ends of the photoconductive materials and the electroluminescent layer. In either embodiment the electroluminescent layer may be of a material excitable by cathode rays so that this layer itself provides the cathodoluminescent layer. A further layer may be interposed between the photoconductive and electroluminescent lavers to limit the amount of feed-back.
Patent GB-558390-A (GB)
Title: Improvements in, or relating to, the manufacture or production of articles from powdered material
IPC: B22F3/105
Filed: 1942-05-12
Abstract: 558,390. Powder metallurgy. BIRMINGHAM ELECTRIC FURNACES, Ltd., and ROBIETTE, A. G. E. May 12, 1942, No. 6395. [Class 82 (i)] [Also in Group XXII] Articles such as piston rings are produced from powdered metal or alloy by passage continuously through an electric induction furnace provided with a neutral or reducing atmosphere. The compacts are mounted on carriers of refractory insulating material shaped to nest together. A carrier is fed into the bottom of a limb of a furnace in the general shape of an inverted U. displacing a carrier at the top of the limb into the descending column in the other limb in which it is lowered for removal. Reducing gas is supplied to the limb. The sintering is effected by an induction furnace and the turns of the coil instead of being uniformly spaced may be variably spaced to control the cooling either instead of or in addition to a water or air cooled jacket. The first stage of cooling may be effected by passing through an electric resistance furnace with graduated heating. Instead of supplying gas, the powder may be mixed with a metallic hydride that will be decomposed during sintering liberating atomic hydrogen. The carriers may be replaced by moulds adapted to apply pressure during sintering by the weight of the stack. The furnace is described and shown in Specification 568,382, [Group XL].
Patent GB-329970-A (GB)
Title: Improvements in and relating to systems of ship propulsion
IPC: B63H23/00
Filed: 1929-02-27
Abstract: 329,970. British Thomson-Houston Co., Ltd., Jaffrey, J. A., and Pollock, A. A. Feb. 27, 1929. Dynamos and motors combined for transmitting power; electromechanical power transmission systems.-In ship propulsion plant comprising a main engine and an exhaust steam turbine coupled to a direct current generator supplying current to a motor mounted on the propeller shaft to assist the main engine, the motor is arranged to change over to a generating condition on a rapid increase in speed of the shaft. An exhaust steam turbine is coupled direct or through gearing to a direct current generator 1 which supplies current to a main motor 2 on the propeller shaft. The motor has a shunt field 3 excited by a selfexcited mechanically coupled exciter 4 and a differential shunt field 5 excited by an exciter 6 directly coupled to the generator shaft. The generator has a shunt field 7 excited by a direct coupled exciter 6 and differential shunt field 8 excited by the exciter 4 mechanically coupled to the motor shaft. A separate flywheel may be mounted on shaft of the exhaust turbine within its casing.
Patent GB-786701-A (GB)
Title: Improvements in or relating to portable sawing tools
IPC: B27B9/02
Filed: 1956-03-01
Abstract: 786,701. Sawing. G.M.F. ELECTRIC MOTORS PTY., Ltd. March 1, 1956 [March 2, 1955], No. 6478/56. Class 145. The hand grip 7 of a portable circular saw is provided with a flat part 10 bored with two holes 12 so that, in the inverted position, it can be attached to a bench. An apertured plate 13 is attached to a safety guard 2 integral with the hand grip and a rod 18 fixed to the plate by a screw 21 carries a slidably-adjustable fence 22. The end of the spindle remote from the saw blade carries means for the attachment of a flexible driving shaft.
Patent GB-931902-A (GB)
Title: Improvements in or relating to injection moulding machines
IPC: B29C45/52
Filed: 1961-02-22
Abstract: 931,902. Injection moulding machines. BONE BROS. Ltd., and E. R. KLEIN. Feb. 22, 1962 [Feb. 22, 1961], No. 6484/61. Class 87(2). An injection moulding machine has a feed screw 1 provided forwardly of its screw threads with an extension 4 having an aperture 5 controlled by a valve member 8 which permits forward flow of thermoplastic material but prevents reverse flow during injection. Injection may be effected by axial movement of the feed screw or by a separate plunger. The aperture 5 communicates with passages 6 in the extension 4 and passages 10 in a detachable ring member 9. Specification 860,217 is referred to.
Patent GB-824017-A (GB)
Title: Improvements in and relating to structural units for floorings or walls
IPC: E01C13/04
Filed: 1957-02-27
Abstract: 824,017. Building units. SVENSKA CELLULOSA A. B. Feb. 27, 1957 [Feb. 29, 1956], No. 6592/57. Class 87(1) A building unit comprises a corrugated metal sheet 1 fixed in a wooden frame 2 and supported on one side by correspondingly corrugated transverse laths 3 and on its other side by a wood fibre board or other plane slab 4. A surface layer 6 consists of tiles made of polyvinyl chloride or a continuous layer of linoleum &c. Tongues 7 and grooves 8 are provided on the outer edges of the frame.
Patent GB-525836-A (GB)
Title: An improvement relating to bottles
IPC: B65D1/02
Filed: 1939-03-01
Abstract: 525,836. Stoppers for bottles. PARIS, B. March 1, 1939, No. 6740. [A Specification was laid open to inspection under Sect. 91 of the Acts, March 1, 1940.] [Class 125 (iii)] A bottle has a bead 4 at the edge of its neck to receive a crown cork, and a number of spaced projecting lugs 7 below the bead. Preferably the number of lugs does not exceed four, and the corners of the lugs serve as fulcrums for a coin or tool used to remove the crown cork.
Patent GB-911283-A (GB)
Title: Improvements in or relating to electric cables
IPC: H01B7/00
Filed: 1960-02-26
Abstract: 911,283. Resistive cables. WARD & GODSTONE Ltd., GOLDSTONE, S., and LUCAS, E. H. P. Feb. 13, 1961 [Feb. 26, 1960], No. 6759/60. Classes 36 and 37. An electric cable has a core of conducting plastics material extruded about a fibrous centre, such as a textile or paper thread, cord, or braiding, and is enclosed in an outer insulating sheath. The core material may be a thermoplastic, such as polyvinyl chloride or its co-polymers, containing a plasticizer and finelydivided carbonaceous material which acts as a conducting filler. The sheath is made, for example, of polyvinyl chloride, polythene, natural rubber, or of a synthetic rubber such as polychloroprene (neoprene), and may consist of two layers of which the thin inner layer is chosen for its electrical properties while the thicker outer layer is provided for protection against heat, abrasion, similar physical influences, and attack by oil or acids.
Patent GB-307078-A (GB)
Title: Process for the production of sound films
IPC: G11B7/00
Filed: 1929-03-02
Abstract: 307,078. K³chenmeister, H. J. March 2, 1928, [Convention date]. Records, duplicating.-A process of producing a photographic sound record consists in making a modified duplicate of the matter recorded on an existing record, such as an ordinary disc record, by using two or more electric pick-ups, which are actuated by the existing record in known manner so as to operate successively with a small time interval, the pick-up being so arranged as to operate in common through an optical recording device to which they are connected. The pick-ups used may be of different kinds, for example, one may be of the electromagnetic type and another an electrostatic device. The Specification as open to inspection under Sect. 91 (3) (a) states also that " it is possible to reconvert the improved photophonograms into sound plates or other phonograms," and also refers to the use of " engraved, etched, or other film markings, magnetically sensitized steel wire or ribbons," in carrying out the invention. This subject-matter does not appear in the Specification as accepted.
Patent GB-106306-A (GB)
Title: Improvements in High Pressure Gas Hand-irons.
Inventor: CRAWFORD CHARLES
IPC: D06F75/02
Filed: 1916-05-15
Abstract: 106,306. Crawford, C., and Harry, R. H. May 15, 1916. Gas hand-irons are provided with an arched chamber 2 open at one end to receive a casting 6, pre. ferably of iron, forming a highpressure gas burner, downwardly. directed apertures 9 for the outlet of the gas mixture being formed in a thickened base 8, or in webs 10, Fig. 3. The burner is supported at the inner end by a ledge 5, and at the other end by ledges 4a, and is held in position by a screw-stud 13. The end oi the burner is fitted with a plug 12, and openings 15 are provided in the sides of the iron for the escape of the products of combustion.
Patent GB-871053-A (GB)
Title: New or improved hydraulic power lift mechanism for tractors
Inventor: ASHFIELD HERBERT EDWARD
IPC: A01B63/114
Filed: 1959-02-27
Abstract: 871,053. Tractor power-lift mechanisms. DAVID BROWN INDUSTRIES Ltd Feb. 24, 1960 [Feb. 27, 1959; July 23, 1959], Nos. 6921/59 and 25255/59. Class 79(1). Means are provided to maintain a predetermined minimum pressure in the hydraulic system of a tractor power-lift mechanism with automatic depth control. A pump 10 supplies a ram 12 in which the pressure is controlled by a depth control valve 35 and a valve 36 which maintains a predetermined pressure in the system. The valve 35 is operated through a cable 44 and a lever 45 by a spring-loaded telescopic link 30 and is set by a hand lever 49 through a bell-crank lever 47. If the lever 49 is moved to position 84 the valve 35 is closed by a spring 52 to raise the pressure in the ram and lift the implement by a linkage including a shaft 26 which operates an overcentre device 60 during its last few degrees of movement. The device 60 contains a spring 90 which acts through an arm 58, rod 57, arm 56, shaft 23, arm 22, rod 21, bell crank lever 20, rod 19 and a plate 18 to open a valve 16 between'the pump 10 and its sump 11. A valve 17 having greater resistance to operation than the valve 16 remains closed together with a non-return valve 15 to trap the fluid in the ram. If leakage of fluid occurs the over-centre device 60 re-closes the valve 16 until the ram is fully recharged. To obtain quick penetration with a light implement on hard soil, the lever 49 is moved to the position 85 causing a rod 72 to rotate the arm 56 to open both valves 16, 17 and reduce. the pressure to zero. With the hand lever 49 in the position 83, the valve 35 is fully open and the automatic variations in its movement are insufficient to cause throttling of the flow from the pump so that if the implement is provided with a depth-regulating wheel or skid load transfer occurs due to the action of the valve 36. The latter consists of a spring-closed member 37 having a bleed hole 38 communicating with an adjustably spring-loaded ball 39. A screwed member 40 having axial grooves engaged by a spring-loaded ball 78 enables the operator to adjust the load on the ball 39. When the latter is lifted the member 37 becomes unbalanced and opens until the pressure in the hydraulic system again falls to the predetermined minimum. The cable 44 may be disconnected from the link 30 and a coupling 71 from the shaft 26 so that apparatus such as a loading shovel, bulldozer, tipping trailer or a push-off stacker may be operated, the lever 49 controlling the valves 16, 17 so that the linkage may be raised, locked or lowered. The first Provisional Specification describes a modification in which a separate manual control combined with an over-centre device is provided for the valves 16, 17.
Patent GB-783245-A (GB)
Title: Crown cap
Inventor: GORA HENRY ZACHARY
IPC: B65D41/12
Filed: 1956-03-06
Abstract: 783,245. Crown closure caps. GORA-LEE CORPORATION. March 6,1956, No. 6991/56. Class 125(3). A crown closure cap having means for releasing excess pressure has a metal shell with a flexible end wall 10 and fluted skirt 12, and a sealing member 22 of rubber or other elastomer with a central thin diaphragm 24, outer annular zone 26 and a preformed annular ridge 28 which engages the inner edge 31 of the bottle mouth, the ridge having a slot 29 so that when increased pressure causes wall 10 to bulge upwardly ridge 28 is raised and gas can escape through slot 29 to relieve pressure, the ridge returning to form a seal when the excess pressure is released.