baber/WOPTO huggingface dataset:
Patent GB-1386651-A (GB)
Title: Reproduction of half-tone illustrations
IPC: H04N1/036
Filed: 1972-02-14
Abstract: 1386651 Facsimile system DR ING RUDOLF HELL GmbH 14 Feb 1972 [18 Feb 1971] 6829/72 Heading H4F In a printing process half-tone illustrations are reproduced in the form of picture spots of variable size on a light-sensitive recording film or foil such that each picture spot comprises a selected number of adjacent component dots of predetermined size, said selected number corresponding to the instantaneous tonal value encountered in scanning a picture original and said dots being produced by pulsing a polarized laser beam or beams by a corresponding light switch or switches each comprising a polarization-rotation device and a polarization analyser. As shown in Fig. 1, original 5 and film 6 are rotated on drums 3, 4 on a common shaft 2, drum 3 carrying a timing scale 14 used to control a pulse generator 16. Photocell 9 detects the brightness variations as the original moves past scanning lens 8 and the resluting signals are passed to a gradation converter 11 providing an analogue output to comparator 20 which produces output pulses, at the frequency determined by generator 16, representing the step of a grey scale in which the analogue signal lies at each timing pulse. The quantized pulses are binary coded in coder 24 and fed to a store 23 in which are stored instructions for controlling the recording beams. These instructions are applied to transistors 31 controlling polarization rotating devices 35 lying in the polarized beams 40 derived from laser 36. In the unexcited state the devices 35 pass the beams unchanged to be blocked by analysers 38. The five (or up to ten) beams are controlled by the devices 35 to form, in conjunction with the movement of film 6, a picture spot 46 (Figs. 2 and 2a to 2d) having a size related to the tonal value of the corresponding scanned point on original 5. Wedges 42 are used to equalize the light beams. The controllable light switches preferably operate in the full "on" and full "off" states only. In a first modification, Fig. 3 (not shown), a single laser beam passes through a single polarization control device and analyzer and is then incident upon an inclined face of a prism having an electrically controlled refractive index, causing the beam to scan parallel to the shaft 2 of drum 4, each picture spot being formed in, say, five such scans and being similar to that, shown in Fig. 2. In a further modification Fig. 6 (not shown), the output of a laser is split into several parallel beams by parallel beam splitters, these beams are brought close together by respective optical fibres and are focused on to the film. Preferably the polarization control devices 35, and possibly the controllable crystal in the first modification, are cooled by immersion in a circulating liquid or gaseous medium which is subsequently used to cool the laser, Fig. 5 (not shown). Device 11 may be a colour computer for colour reproduction.
Patent GB-1344549-A (GB)
Title: Separation of cobalt-from nickel- and cobalt-bearing ammoniacal solutions
IPC: C01G51/00
Filed: 1972-02-14
Abstract: 1344549 Cobalt and nickel separation SHERRITT GORDON MINES Ltd 14 Feb 1972 [5 March 1971] 6837/72 Heading C1A Nickel and cobalt bearing material is leached in one or more stages under oxidizing conditions with an ammonium salt leach solution, the solution from the leach operation being treated in at least two cobalt removal stages with a sulphidizing agent to form a mixed Nickelcobalt sulphide precipitate, the agent in one stage being sufficient to produce a Ni-Co ratio in the treated solution of 500 : 1 or over, the agent in another stage being sufficient to cause the precipitate formed therein to have a Ni-Co ratio of 2 : 1 or lower; the precipitate is removed from each stage and at least a portion is recycled to the solution from which it was removed, the un-recycled portion of the precipitate from the other stage is removed as mixed Ni-Co sulphide product and any unrecycled precipitate formed in said one stage is added to a further stage, at least a portion of solution from the other stage is recycled to the leach operation and the solution from said one stage is recovered as product liquor for subsequent treatment to yield nickel. Where three cobalt removal stages are used, 1, 2 and 3 in conjunction with two leaching stages, A and B, solution from A is treated in 2, the precipitate in 2 being separated and a portion being recycled to 2, the remainder with solution from B being passed to 3, solution from 2 being passed to 1 and the un-recycled portion of the precipitate from 1 is passed to 2. The sulphidizing agents may be H 2 S, (NH 4 ) 2 S, Na 2 S and NaHS. The product liquor may be maintained at 65-70‹ C. for a time sufficient to precipitate contained sulphides and manganese which are separated. The Ni-Co sulphide product may be washed with (NH 4 ) 2 CO 3 , the wash solution, after washing, being recycled to the leaching operation.
Patent GB-760733-A (GB)
Title: Improvements in and relating to a sterilizing process by means of an ozonized gas
IPC: A61L2/20
Filed: 1954-03-10
Abstract: 760,733. Sterilizing processes. TORRICELLI, A. March 10, 1954 [March 12, 1953], No. 6932/54. Class 81(1) In a sterilizing process e.g. for bottles or wrappings adapted to receive sterile products, containers in which foodstuffs are to be treated or preserved and for disinfecting rooms by means of an ozonized gas, the gas is caused to act under pressure directly i.e. without being dissolved in a liquid on the objects or articles to be sterilized at a gaseous pressure in excess of atmospheric in an enclosed space. Preferably ozonized air containing 1 per cent (by volume) of ozone is used under a pressure not exceeding one atmosphere. In one application shown in Fig. 1 instruments 12 are sterilized by placing in a hermetically closable container 1 provided with cock controlled conduits 3, 4 adapted to inject an ozonized gas and a neutral sterile gas respectively and a cock controlled conduit 7 connected to a water jet injector 9, evacuating the air by operating the injector with cocks 5 and 6 closed and cock 8 open. Ozonized air under the desired pressure is then allowed to enter by closing cock 8 and opening cock 5 and after a period depending on the concentration of the ozonized air the latter is evacuated by the pump and sterile air admitted the necessary cocks being opened and closed. In another application as shown in Fig. 3 empty bottles are sterilzed in a rotating automatic sterilizing machine 16 of known type, modified to allow application of the invention and to which they are conveyed on a chain conveyer and travel along the direction a-b-c-d-e so that when a bottle 15 arrives at b it is automatically sealed and then evacuated by a vacuum pump 18 connected by a conduit 17 after which ozonized air from an ozonizer 20 under pressure of a compressor 21 is fed into the bottle at c through a conduit 19 and after travelling to d the ozonized air is discharged through a conduit 22 and may be replaced by a neutral sterile gas delivered by the conduit 23 after which the bottle proceeds through the position e to a filling machine.
Patent GB-583789-A (GB)
Title: Improvements in marine floating mines
IPC: F42B22/08
Filed: 1940-04-17
Abstract: 583,789. Floating mines. MIDGLEY, A. H., and HUSKINSON, P. April 17, 1940, No. 6945. [Class 9 (ii)] A floating mine for' use in rivers or other shallow waters is fitted with a sinker which is automatically released from the mine after a predetermined period of immersion. As shown, the sinker a is fitted around the housing b containing a soluble plug d which serves as a delay arming-device. for the mine. The sinker a is normally secured to the mine by a series of balls f which are held in engagement with apertures e in the housing b by a ring g. The latter is normally constrained, by a spring i, to bring apertures h in the ring into register with the balls f so as to free same and release the sinker. The ring is, however, held in the operative position shown by a conical-ended pin k projecting into one of the apertures h. The pin k is held in its locking-position by a spring-controlled plunger l which is released after a predetermined period of immersion by the breaking-down of a soluble holding-plug n surrounding the stem l<1> of the plunger. The mine may be fitted with cork floats, as described in Specification 583,788, in which case means may be provided for automatically freeing the corks when the sinker is released from the mine.
Patent GB-774234-A (GB)
Title: Improvements in or relating to electric current generators
IPC: B63H23/24
Filed: 1955-03-10
Abstract: 774,234. Supply systems depending on two or more machines or sources. NEUFVILLE, J. M. M., and TROTTIER, J. E. March 10, 1955 [March 15, 1954: June 22, 1954], No. 7050/55. Class 38 (4). Generating plant for use on a ship comprises an alternator 2 driven from the propeller shaft I through a mechanical, or electrical, transmission which provides for constancy of speed of the alternator with variations in propeller speed down to a certain limit, below. which the alternator is automatically unclutched from this transmission and an auxiliary engine 10 is started up, the engine (which may be started by clutching to the afternator) then taking over the drive of that alternator, or driving another alternator which takes over the load before the first is disconnected therefrom. In the latter case the second machine is first connected to the load through resistors which are subsequently cut out the speed and frequency of that machine are slightly below that of the first machine. A flywheel 7 coupled to the alternator 2 maintains the supply during the change-over period. In the arrangement shown in Fig. 1 the alternator is driven through a variable speed gear 3, the ratio of which is automatically controlled in dependence upon the speed of the shaft 1 by an electric motor 4 to maintain constant alternator speed. Upon the speed of shaft 1 falling below a certain value, clutch 6 disengages and engine 10 is started up to drive a separate alternator 11. In the arrangement of Fig. 2 the alternator 2 is driven from the shaft 1 through a Ward- Leonard set 13, 15, the excitation of the generator and motor of which are automatically controlled in dependence upon the speed of shaft 1 for constancy of speed of the motor 15. When the speed of shaft 1 drops below a given value. clutch 6 disengages and clutch 16 engages to start engine 10 which then takes over the drive of the alternator 2.
Patent GB-455040-A (GB)
Title: Improvements in or relating to brick roofs for furnaces and the like
IPC: F27D1/14
Filed: 1935-03-06
Abstract: 455,040. Furnace roofs. COMBE, A. C., and JOHNSON, W. H., Chartered Bank Buildings, Clive Street, Calcutta, India. March 6, 1935, No. 7063. [Class 51 (ii)] In a suspended brick roof the hangers 5 are flexible and are looped or hooked at one end to engage the overhead support and looped at the other to embrace a metal or refractory bar 9 which fits into a dovetail recess 3 in the top of the roof brick 1. The bar and the recess into which it fits closely, are of circular cross-section, and the slot leading to the recess is just wide enough to admit the suspender. In the construction shown hoop iron is used for the suspenders, and the ends of the loops are secured by bale clips 7. The lower loop may be reinforced by a second iron strip. The bricks may be 6 x 3 inches on their exposed faces and 4 to 15 inches deep, and when the depth of the brick is 4 to 6 inches the suspender may be four times the depth. The overhead supports are so mounted that a line of bricks can readily be raised, and they are preferably tubular, and may be water or air cooled. A line of silica bricks assembled upon a support may be preheated to a temperature above the critical temperature of expansion and contraction before being fitted into the roof. Specification 215,464, [Class 51 (i)], is referred to.
Patent GB-455193-A (GB)
Title: Process for the protection of metals against electrolytic corrosion, and means for carrying out such process
IPC: C09D195/00
Filed: 1936-03-09
Abstract: In the process for the protection of metals against electrolytic corrosion described in the parent Specification, the coating comprises a mixture of free carbon and rubber, which may be applied in the form of strips.  The metal, e.g. a cable or pipe, may first be coated with a mixture containing carbon, and the rubber composition may be protected by a metallic covering, which may itself be protected by rubber strips as above.  The carbon may be in the form of graphite, wood charcoal, gas carbon or coke.  The rubber mixture may alternatively be applied as a paste, by spraying, by electrodeposition, or as a sheath.  The rubber may be replaced wholly or partly by a compound, paint or varnish, having a natural gum base such as guttapercha or balata.
Patent GB-187911-A (GB)
Title: Improved means for extracting coke from vertical retorts or chambers
IPC: C10B33/02
Filed: 1922-03-10
Abstract: 187,911. Dempster, Ltd., R. & J., and Rodger, W. F. March 10, 1922. Discharging.-Apparatus for discharging vertical retorts &c. comprises a vertically revoluble shaft d carrying rods k mounted in multiple helical form within the base portion b leading to the discharge outlet c. In the modification shown in Fig. 4, the helices are arranged in step-like form, the coke having to fall down the steps o as the device is rotated.
Patent GB-928615-A (GB)
Title: Improvements in or relating to cathode-ray tubes
IPC: H01J29/20
Filed: 1961-02-28
Abstract: 928,615. Luminescent screens. PHILIPS ELECTRICAL INDUSTRIES Ltd. Feb. 28, 1961 [March 2, 1960], No. 7094/61. Class 39 (1). A luminescent material suitable for use in, e.g. a flying spot scanner cathode-ray tube, has a decay time less than 2.10<SP>-6</SP> sec. and consists of a mixed sulphide of cadmium and at least one of the elements calcium and strontium, activated with trivalent antimony, the ratio of the number of cadmium atoms to the sum of the numbers of calcium and strontium atoms being from 5.10<SP>-3</SP> to 10<SP>-1</SP>, and the ratio of the number of antimony atoms to the sum of the numbers of atoms of calcium, strontium and cadmium being from 10<SP>-5</SP> to 10<SP>-2</SP>. The materials used may be manufactured in a manner that is usual for sulphides of calcium and in a specific example (a mixture of) 300 gms. of CaSO 4 .2H 2 O, 14 gms. of CdS and 0.13 gms. Sb 2 O 3  is fired for 1 hour at 950‹ C. in a reducing H 2 S atmosphere, ground, mixed with (50 mgms. of) CaF 2  as a flux and fired for another ¢ hour at 1100‹ C. in an H 2 S atmosphere, and after a final grinding and firing at 1000‹ C. the final reaction product is ready for use, luminescence taking place at a wavelength between 570 mÁ and 650 mÁ.
Patent GB-512621-A (GB)
Title: Improvements in or relating to compound diesel engines
IPC: F02B41/06
Filed: 1938-03-07
Abstract: 512,621. Compound compression-ignition engines. LOMONOSSOFF. G. V., and TOTH, C. J. March 7, 1938, No. 7135. Drawings to Specification. [Class 7 (ii)] The volumes of the compressor, highpressure cylinder, low-pressure cylinder and a receiver between the compressor and highpressure cylinder conform to formulae which are given in the Specification. Adequate cooling is thereby effected in the receiver. A polar diagram in which the four parts are represented by concentric areas is used for determining their proportions.
Patent GB-330287-A (GB)
Title: Improvements in and relating to cabinets for containing gramophones or wireless loud speakers along with other articles
IPC: G11B31/00
Filed: 1929-03-05
Abstract: 330,287. Lyle, S. March 5, 1929. Loud-speakers.-The lower part of a cabinet houses a wireless receiver and a gramophone while the upper part which is formed as a cupboard, and may be separable, has a sound-amplifying horn extending up the rear part thereof and opening out at the front above the cupboard doors. The cabinet is preferably triangular in section to fit in a corner, the horn q being similarly shaped. Two mouths p<1>, m<1>, are preferably provided for the horn for the loud speaker unit and gramophone sound arm respectively. Hinged flaps k, l give access to the gramophone, and records and batteries may be stored in the lower part of the cabinet.
Patent GB-551433-A (GB)
Title: Improvements in electromagnetic relays
IPC: H01H50/62
Filed: 1942-05-27
Abstract: 551,433. Relay selectors. WESTERN ELECTRIC CO., Inc. May 27, 1942. No. 7161. Convention date, April 19, 1941. [Class 40 (iv)] [Also in Group XXXVII] An electromagnetic relay adapted to effect an economy in the number of contact springs, soldered connections and coils necessary to achieve certain ends, comprises a reed armature 6 arranged between magnetic laminations acting as pole pieces with interposed insulating laminations. In the form shown in Figs. 1 and 4, the reed 6 is arranged between two poles 1 and 3 on one side and a pole 2 on the other and a coil L surrounds the poles 1 and 2 and a coil R surrounds the pole 3. The reed 6 is biased downwards into the position shown in Fig. 4. If R is energized the armature moves up to complete circuit f b and break circuit a f. Subsequent energization of L produces no further effect and the armature will remain in its upper position if either R or L is then de-energized. If from the position shown L is energized and then R, nothing happens. Fig. 12 shows an arrangement for counting impulses in a circuit 79, 80. Three impulses can be counted and each lights a lamp 82 or 84 or 86. A coil L surrounds a number of fixed cores and two oppositely arranged coils R<SP>1</SP>, R<SP>2</SP> surround other cores. Each reed armature 72, 73, 74 &c. carries a projection 47 which bears on the armature below. Switches 48, 50 are first closed and relay 80 operates to remove a short circuit across coils L, R<SP>2</SP>. All three coils are thus energized in series but coils R<SP>1</SP>, R<SP>2</SP> oppose each other and produce no magnetic effect. Disc 79 now breaks the circuit 80 say the first of three times, causing L and R<SP>2</SP> to be short circuited so that R<SP>2</SP> alone exerts a magnetic force. Armature 72 is attracted. When the " break " impulse has ceased coil L attracts armature 73 and closes circuit to lamp 82. The next impulse causes armature 74 to move up, and then armature 75 and lamp 84 to be lighted and so on.
Patent GB-622386-A (GB)
Title: Improvements in shears and the like
IPC: B26B13/28
Filed: 1947-03-17
Abstract: 622,386. Pivotal joints. PAYNE CUTLERY CORPORATION. March 17, 1947, No. 7335, Convention date, Nov. 16, 1939. [Class 65 (ii)] A pivotal joint for a pair of scissors or the like comprises an 'internally screwthreaded pin - like member of which an end 7 forms a pivot for the blade 6 while the other end 11 engages slidably and non-rotatably in the other blade 5, a screw 13 engaged in the pin-like member and adapted to adjust the pressure between the blades, and a loop 19 of spring wire anchored to the blade 5 and adapted to hold the screw yieidingly in adjusted position.
Patent GB-435915-A (GB)
Title: Improvements in or relating to apparatus for opening and closing windows, ventilators or the like
IPC: E05F11/10
Filed: 1935-03-08
Abstract: 435,915. Window and ventilator regulators. LUXFER, Ltd., and BATES, E. L., 16, Hill Street, Tabernacle Street, London. March 8, 1935, No. 7367. [Classes 20 (iii) and 137] A regulator for a pivoted window or ventilator comprises a rack or the like 5 longitudinally movable by handle and pinion 14, with or without reduction gear, and operatively connected by a slotted extension 6 to an eccentric pin 8 on a disc 9 on the sash housed in a recess in the frame. The sash pivots are mounted on the discs 9. A spring-pressed rounded stud and a recessed casing 27, Fig. 9, may be provided to hold the handle yieldingly in various positions, or a cross-pin on a spring- pressed sleeve on the handle may act as holder. The handle and gearing are carried by a slotted casing 18 screwed to the frame. The rack may be used for two or more sashes &c. and may then be adjustable by a coupling member accessible through a removable panel in the frame. A locking device for the closed position may consist of a spring-pressed stud 31 in the handle engaging an apertured bracket 32 and provided with a thumb-piece 33.
Patent GB-1483397-A (GB)
Title: Carburetor having cold enrichment control
IPC: F02M1/10
Filed: 1975-02-21
Abstract: 1483397 Spray carburetters FORD MOTOR CO Ltd 21 Feb 1975 [6 March 1974] 7457/75 Heading F1H In order to prevent stalling under 'cold run' conditions of an internal combustion engine, the fast idle cam 160 of a thermostatically choked carburetter, which cam is arranged to be operable in response to the thermal activation system 40, is not affected by the operation of an additional choke valve pull-open servo 90, Fig. 2. The choke valve 28 is spring-biased toward a closed position against a stop finger 50 via the angularly displaceable link 54, the finger 50 being positioned in response to the thermal activation system 40. This allows the servo 90, connected via rod 156 to link 54, to open the choke valve by rotating the link away from the stop 50 independently of the thermal activation system, in response to high engine vacuum. Correct idle speed is selected by the screw 178 engaging one of the faces of steps 170, 172, 174 or recess 176 on the fast idle cam the angular position of which is controlled by engagement under gravity of screw 164 with finger 50. The thermal activation system 40 Fig. 1 comprises a bi-metallic coiled spring 68,  responsive to manifold heat via the passages 78, 80, or the ambient temperature in the housing 84, and operating the shaft 44 via lever 60. A piston 87 actuated by manifold vacuum allows the choke to be 'cracked' open after initial engine firing. The pull-open servo 90 is prevented from operation below a predetermed temperature by a bi-metallic disc valve 126, Fig. 4. When the valve 126 is opened air under the influence of the manifold vacuum, bleeds via a restrictor plug 105 and check valve 108 from the vacuum chamber 144 causing the diaphragm 140 to move the rod 148 inwards thus opening the choke. On the collapse of the engine vacuum the check valve unseats to allow air to flow unrestricted into the chamber 144 via slot 106, returning the rod 148 rapidly to its inoperative position. The lost motion linkage 152, 154 ensures that the operation of the thermal activation system will be independant of the servo 90 when the servo is in the inoperative position.
Patent GB-758124-A (GB)
Title: Improvements in or relating to the production of metal tubing from strip material
Inventor: KARMAZIN JOHN
IPC: B21C37/087
Filed: 1954-03-15
Abstract: 758,124. Making tubes; brazing. CALUMET & HECLA, Inc. March 15, 1954, No. 7515/64. Classes 83 (2) and 83 (4). [Also in Group XXVIII] Metal strip 10 is passed between rollers 12, or dies, which form in the strip a channel 16 adjacent one edge in which is laid a strip 18 of brazing material. The margins of the strip are then flattened and bevelled at 15, 17 by rollers 14 to compress the brazing material 18 in the channel 16, Fig. 4. The strip is then bent into tube form with the flattened edges overlapping and heated so that the brazing material 18 melts and flows between contacting surfaces. Two or more channels for brazing material may be formed in the strip.