baber/WOPTO huggingface dataset:
Patent GB-987500-A (GB)
Title: Process for the production of urea
IPC: C07C273/04
Filed: 1962-03-07
Abstract: Urea is made by a process, in which gases containing excess ammonia, with respect to carbon dioxide, and carbon dioxide are reacted together with recycled gases, as hereinafter explained under ammonium carbamate forming conditions, the resulting product is subjected to urea synthesis conditions, the crude urea containing product is expanded and separated into ammonia-rich gas which is recycled to the urea synthesis zone and/or recovered as a comparatively pure gas, and a carbamate-containing urea solution which is further expanded and separated into a gaseous product which is recycled to the carbamate formation zone, and a carbamate-containing urea solution which is again expanded, decomposed, and separated into a gaseous product which is recycled to the carbamate formation zone and a urea rich aqueous solution. Especially useful starting mixtures of ammonia and carbon dioxide are those obtained from the production of melamine from urea.  Two examples are described with reference to a flow sheet, in which the detailed compositions of the various streams in the system are included.
Patent GB-1425265-A (GB)
Title: Image apparatus
IPC: H01L31/14
Filed: 1973-02-22
Abstract: 1425265 Electroluminescence MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 22 Feb 1973 [22 Feb 1972] 8827/73 Heading C4S An image modifying apparatus comprises an assembly to which an image can be applied and comprising transparent electrode 15, photoconductive element 14, negative resistance element 13 having a positive temperature coefficient of resistance, electroluminescent element 12 and transparent electrode 11, a direct voltage source being connected directly to provide a non-linear relationship between image and electroluminescent intensities. Changes with temperature of a F.T.C. thermistor characteristic are discussed w.r.t. Fig. 3 (not shown). The critical voltage V c  (Fig. 2, not shown) may be varied by heating the thermistor layer so that the anti-halation effect may be achieved at different brightness levels, layer 12 brightness decreasing with input light increase above the critical value, and the contrast increasing in dark field areas. The temperature may be controlled by a heater of metallic wire or thin metallic film in layer 13 (Fig. 4, not shown). Thermistor layer 13 may be formed by applying a paste of the powdered thermistor material dispersed in a vehicle and curing the paste. The electrodes may be of tin oxide, the photoconductor of CdS or CdSe, the luminescent material of ZnS or ZnSe.
Patent GB-993232-A (GB)
Title: Improvements in draught excluders
IPC: E06B7/20
Filed: 1964-03-03
Abstract: 993,232. Draught excluders. H. HARPER. March 3, 1964, No. 8832/64. Addition to 967,137. Heading E1J. The draught-excluding strip 16 of the excluder described and claimed in the parent Specification has an edge 15 adapted to be received in a groove 13 in the hinging strip 10 secured to the edge of the door A, and the strip 16 is biased when the door is open to an inoperative position by the spring 19 secured behind the strip 10 and located opposite the abutment piece 22 on the pivot when the door is closed. The strips 16 and 10 are made of resilient material, e.g. plastics and produced by extrusion.
Patent GB-939667-A (GB)
Title: Improvements in or relating to devices for the cold separation of gas mixtures
IPC: F25J3/04
Filed: 1960-03-14
Abstract: 939,667. Cold separation of gas mixtures. PHILIPS' GLOEILAMPENFABRIEKEN N. V. March 14, 1960 [March 17, 1959], No. 8901/60. Class 8(2). Rectification of a compressed gas mixture e.g. air supplied through a duct 1 is effected by cooling the major portion of the air to a temperature not below the freezing point of low volatile impurities in alternating exchangers 26, 27 cooled by separated nitrogen leaving the head of a column 18, liquefying the minor portion of air traversing a valved duct 6 by cold supplied by a gas refrigerator 10 of the reversed gas engine type sufficiently to freeze the impurities which collect on a sieve 11 and adding the so liquefied minor portion in a duct 12 to the cooled major portion at a point 15 and feeding to the column 18 through a duct 13 and a silica gel trap 14. As shown the cooled major portion is condensed in a coil 16 in the evaporating chamber 17 of the column having a product liquid oxygen outlet 19 and the temperature of the effluent nitrogen is sufficiently raised by indirect contact with cooled air in a coil 25 to avoid freezing of impurities in the exchangers 26, 27. The controlled air flow in duct 6 equals the liquid oxygen output. In a modification freezing and separation of impurities from the minor air stream is effected in a chamber enclosing the evaporator of the column; the evaporator or column being in conduit connection with the condensing chamber of the gas refrigerator. In a further modification the combined major and minor air streams in ducts 36, 12, Fig. 4 (not shown) are fed to the base of the lower portion of a two-stage column and from which said stream is passed through a gel absorber to the upper portion of the column.
Patent GB-678685-A (GB)
Title: Improvements in or relating to single-phase induction motors
IPC: H02K17/08
Filed: 1951-04-17
Abstract: 678,685. Induction motors. WESTING- HOUSE ELECTRIC INTERNATIONAL CO. April 17, 1951 [May 16, 1950], No. 8908/51. Class 35. In order to increase the starting torque of a single phase capacitor motor, the reactance of the auxiliary winding 2 in series with the condenser is made less capacitative by introducing inductance associated with this winding, e.g. by providing wedges 11 of magnetic material in the slots 10 containing the auxiliary winding. This inductance decreases as the motor speed increases, because the wedges 11 become saturated as the current in the auxiliary winding increases from starting to running conditions.
Patent GB-255778-A (GB)
Title: Anti-splash device for the wheels of road vehicles
IPC: B60S1/62
Filed: 1926-04-06
Abstract: 255,778. Lamont, J. April 6, 1926. Lateral-splash preventers.-Splashing from the wheels of road vehicles is prevented by a current of air directed downwardly against the road by a fan or fans mounted in a casing carried by the hub of each road wheel and driven by a spurwheel rotating with the road wheel. The casing A, preferably mounted on ball bearings B on the hub C, is weighted at D, E to prevent it from rotating with the wheel and provided with an internal casing G in which are mounted two fans H, J driven in opposite directions by gear-wheels engaging the spur-wheel N. An opening S formed at the lower part of the casing is provided with a deflecting plate, not shown, and suitable air inlet, ports are provided in the casing.
Patent GB-654430-A (GB)
Title: Improvements in photographic shutters
IPC: G03B9/22
Filed: 1948-03-31
Abstract: 654,430. Photographic shutters. GENERAL ANILINE & FILM CORPORATION. March 31, 1948, No. 9140. Convention date, June 14, 1947. [Class 98 (i)] A photographic shutter includes aperture closing means comprising a pivoted shutter blade or several such blades actuated by interconnecting means, a spring-driven pivoted master member, and means connecting the master member and shutter blade, or the blade interconnecting means, to effect opening and closing of the shutter, said means including two toggle joints in series, one of which is fully broken when the other is in the straightened position. As shown, a conventional multibladed symmetrically-opening shutter of the setting type having a pivoted master member 21 set against a spring 27 and held set by a pivoted lever 31 engaging a lug 26 on the master member, said lever being trippable by a trigger 48 whereupon the master member causes a link 36 pivoted to it at 35 to oscillate a lug on the shutter blade ring, is modified in that the link is arranged to oscillate a lug 43 on one arm 37 of a clockwise urged bell-crank lever pivoted on the mechanism plate at 39, the other arm 38 of said lever being pivoted at 41 to a link 40 pivoted to the blade ring at 42, the arrangement being such that when the shutter is set and the master member and its link 36 are in a fully broken position, the bellcrank lever arm 38 and its link 40 are at dead centre. Thus on actuating the release trigger 48, the master member rotates clockwise and the left-hand end of a recess 44 in the link 36 rocks the lug 43 anticlockwise, so breaking the links 38, 40 to cause the blade ring to open the shutter until the master member and its link reach dead centre when the links 38, 40 are fully broken. As the master member continues to rotate, it rocks the lug 43 aiiticlockwise, reversing the movement of the blade ring to close the shutter until the Fig. 1 position is reached. The effect of the coupled link systems is to produce a more rapid initial opening and closing movement of the shutter blades together with deceleration of the blades at the end of both the opening and closing movements and to thus yield a more symmetrical shutter opening/time curve. During setting, the crooked end of the link 36 pivots about the lug 43 as the master member is set, the left-hand end of the recess 44 oscillating between the inner wall 11 of the shutter and the lug so that the blade ring is not moved and the shutter remains closed. Slower timed instantaneous exposures are produced by applying a retard to the master member when the shutter blades are fully open by means of a retard train-controlled sector gear. The Specification as open to inspection under Sect. 91 states that both the setting of the sector gear and the engagement of the pallet and star wheels of the train are determined by cams on the speed setting ring (not shown) and the ring also bears cam means for controlling bulb and time exposures. This subjectmatter does not appear in the Specification as accepted.
Patent GB-697817-A (GB)
Title: Method for the supply of combustion air to furnaces having mechanical stokers and apparatus for the performance of the method
Inventor: JACOBSEN JORGEN HELGE
IPC: F23M11/02
Filed: 1951-04-20
Abstract: 697,817. Furnaces. RECK'S OPVARMNINGS CO. AKTIESELSKAB. April 20, 1951 No. 9244/51. Class 51(i) Air for combustion is supplied to the surface layer of the fuel which is pressed up through the top of a trough by a mechanical stoker, the only air supply discharging above the level of the fuel bed. Fuel is pressed up through the trough 7 by a feed screw 3 and air from a distribution chamber 13 below the dead plates 9 is directed on to the surface of the fuel by pipes 10. The air is supplied to the chamber 13 through a pipe 12 by a blower 11. Instead of the distribution chamber surrounding the trough 7, a special distribution chamber 13<SP>1</SP>, shown in dotted lines, may be provided.
Patent GB-1416183-A (GB)
Title: Flying cut-offs for machines for handling elongated products
IPC: B23D25/04
Filed: 1972-02-29
Abstract: 1416183 Flying cut-off apparatus TUBE PRODUCTS Ltd 23 Feb 1973 [29 Feb 1972] 9253/72 Heading B5L [Also in Divisions B3 and G3] A carriage 3 carrying a shear or saw 2 is accelerated to the speed of stock 1, at which point clamps 5 engage the stock by a ram 6 which is restrained by a latch 7, until a predetermined length of such has been fed, while pneumatic pressure is built up in the ram, the pessure being controlled by a regulator 8 itself controlled continuously and automatically in accordance with the speed of the stock. A wheel 10 driven by the moving stock drives a tachometer generator 11 and the pulses produced are shaped at 12 and converted at 13 to a voltage signal which is smoother and amplified at 14 and shaped at 15. The circuit 15 accommodates the non-linear relation between the speed of the stock and the boost pressure required in the ram to accelerate the carriage to that speed. A signal, having passed through a wavelength circuit 16 is compared at 17 with the actual pressure in the ram cylinder and the resulting signal if positive or negative drives a reversible motor 20 acting on the regulator 8 direct or, preferably, on a servo-regulator 21. If the flying cut-off follows a tube-making mill, when the mill is re-started after a switchoff the stock would normally reach its desired speed more quickly than the servo motor 20 could boost the ram pressure. To avoid this, back contacts are provided on the main switch in the mill which energize a relay which interrupts the drive to motor 20 when the mill is switched off, leaving the pressure setting fixed at the valve it held at the moment of switch-off. Alternatively, the tachometer generator wheel 11 is replaced by a potentiometer ganged to the spindle of the control for the speed of the mill and thus the stock. The degree of boost will then match the setting of the mill control knob even when the mill is switched off.
Patent GB-484251-A (GB)
Title: Improvements in or relating to sound recording
IPC: G11B7/00
Filed: 1937-04-01
Abstract: 484,251. Optical sound recording apparatus. RADIO CORPORATION OF AMERICA. April 1, 1937, No. 9313. Convention date, April 29, 1936. [Class 40 (ii)] [Also in Group XX] An apparatus for recording sound by means of a narrow band of light frequencies, preferably ultra-violet light, comprises a light source 10, a light modulating device 14, means for directing the light from the source to the modulating device and thence to the record film 18, a colour filter in the path of this light, and means for directing light from the source to the modulating device and thence to a view point or monitoring screen 21 independently of the colour filter. Lenses 11, 19, 15, 17 and apertured plates 12, 13, 16 are provided in the paths of the light. The colour filter may be placed at 22 before the modulating device or at 23 after the modulating device. In the first case, a red filter 24 is placed before the modulating device in the path of the monitoring beam. This beam is reflected to the screen 21 bv a mirror 20. The wave length of the recording beam may be between 3200 and 4000 Angstrom units. The lenses are made to have the same focus for the ultra-violet light used as for a visible part of the spectrum, for example green, to facilitate focusing. The film used should be absorbent to the part of the spectrum used, whether green, blue, violet, or above 4000 Angstrom units. This is ensured by dyeing the film in known manner. The Specification as open to inspection under Sect. 91 comprises also a number of curves relating to gamma values, development times, densities, and transparencies for various lights, and mentions films with emulsions of ¢ mil. in thickness. This subjectmatter does not appear in the Specification as accepted.
Patent GB-1138632-A (GB)
Title: Pressure-sensitive adhesive materials
IPC: C09J7/38
Filed: 1966-03-04
Abstract: 1,138,632. Laminated pressure-sensitive adhesive material. A. M. KAPRAL. 4 March, 1966 [9 March, 1965; 5 May, 1965; 7 Oct., 1965], No. 9633/66. Heading B5N. A pressure sensitive adhesive material comprises a layer 21 of sheet material, a layer 22 of pressure sensitive adhesive thereon, a stretchable creped backing sheet 23 supporting a silicone coated polyolefine film 24 with the latter film conforming to the surface of the sheet 23 and the silicone contacting the adhesive. As described the backing sheet 23 is creped, crinkled, wrinkled, crimped, rippled, debossed, or embossed to enable it to be stretched and facilitate its removal from the adhesive layer 22. The layer 21 may be of paper, cloth, non- woven fabric, metal foil, plastics sheeting or wood veneer, and the sheet 23 is preferably creped or corrugated paper, e.g. glassine or clay-filled kraft paper. The pressure sensitive adhesive layer may be of rubber-resin. silicone rubber, chlorinated rubber, vinyl ether resin or acrylic resin-rubber latex combinations. The film 24 material is polyethylene or polypropylene. Preferably the sheet 23 is coated on one or both sides with polyethylene overcoated with cured dimethylpolysiloxane solids. In a further embodiment when the sheets 21, 23 are of paper a further sheet of paper is adhered to the exposed surface of the sheet 23 to form a sandwich. The sandwich may be compressed so that the crests of the ripples of the backing sheet are pressed into the adhesive layer 22 to facilitate printing of the sheets. The sandwich may be cut by guillotines. The material, in either embodiment, may be used as labels, posters, or wallpaper.
Patent GB-1498843-A (GB)
Title: Acoustic camera apparatus
IPC: G01H3/00
Filed: 1975-03-07
Abstract: 1498843 Pulse-echo systems WESTINGHOUSE ELECTRIC CORP 7 March 1975 [29 March 1974 (3)] 9639/75 Heading G1G A target area 75 is imaged by transmitting a brief acoustic pulse to insonify a narrow strip 79 which is defined by the intersection of the acoustic wavefront with the area 75 and which thus sweeps the area in a range direction, focusing acoustic returns from adjacent strips Ri-Rn on to respective receiver transducers Ti-Tn, processing the resulting transducer output signals and displaying the processed signals. As shown the focusing device is an acoustic lens and the transducers are elongated. The lens and transducer configuration and spacing are such that the depth of focus extends from a minimum to a maximum target range (corresponding to a propogation time interval t 1 -t M ). The signal processing comprises amplifying range-gated transducer outputs with swept gain in respective signal channels, then sampling the channel signals in turn. The sampled signals intensity-modulate a CRT display whose vertical and horizontal timebase sweeps are synchronized with the pulse transmission and channel sampling respectively. In a typical system the pulses are transmitted at a 60Hz rate with a 3MHz carrier frequency and a 33À3 micro-second duration to give a one-inch slant range resolution; minimum and maximum short range to the 260 inch wide target area are 250 and 500 inches; and 200 receiver channels are used to give a similar resolution laterally and are all sampled within a 30 micro-second period. For use at greater ranges the transmission pulse rate is reduced and storage of echo data (e.g. in a CRT or on a magnetic disc) may be needed to avoid flicker problems in the display. Instead of elongated receiver transducers, point-form ones can be used, the lens then having a cylindrical or part-conical surface Figs. 2, 3, 4 (not shown). An acoustic reflector may be used instead of a lens to provide focusing Figs. 5 6, 7 (not shown). A marine sonar is described Fig. 10 (not shown) in which water-bottom target areas to port and starboard are scanned as described above, using two arrays of receiver transducers in conjunction with a single focusing element, and a third array is used to scan an area ahead of a vessel, thereby "filling-in" the gap between the other two areas.
Patent GB-577691-A (GB)
Title: Improvements relating to the control of boiler feed pumps
IPC: F22D5/12
Filed: 1944-05-19
Abstract: 577,691. Feed-water supply systems for boilers. WEIR, Ltd., G. & J., HILLIER, H., and McALPINE, T. May 19, 1944, No. 9649. [Class 123 (ii)] [Also in Group XXIX] Main and emergency feed-water pumps 6, 2 respectively are associated with a boiler 5, the emergency pump or pumps being brought into operation automatically when the water level in the boiler falls below a predetermined level due to oreakdown of the main pump or pumps or failure of the latter to maintain the required output or pressure. As shown the main pump 6 supplies the boiler through a pipe 7 and float-operated regulating valve 8 and the emergency pump 2 through a pipe 24 which is connected either to the valve 8 or to an independent regulating valve, the pump 2 being driven by a steam turbine 1 to which steam is supplied through pipes 4, 17 and valve 3 when the latter is opened by the action of a pilot valve 11 which is itself actuated by means, such as a float 13, responsive to a fall in the boiler water level to the predetermined minimum. Associated with the valve 3 is an hydraulic piston 10 the underside of which is in communication both with the main pump outlet 7 through a restriction orifice 16 and with one side of the valve 11 through a line 12, the opposite sides of the piston 10 and valve 11 communicating respectively with the outlet 20 of the pump 2, on the pump side of a non- return valve 23, through a line 22 and with the suction pipe 15 of said pump through a line 14. The arrangement is such that, if for any reason, e.g., a failure of the main pump 6, the boiler water level falls beyond the lower range of the float 9 of the valve 8, the float 13 will effect opening of the valve 11 to release the pressure on the underside of the piston 10 and so permit the valve 3 to open, the emergency pump 2 thus being brought into operation and continuing to function until a normally-open steam supply valve 26 in the pipe 17 is closed by hand. A throttle valve 18 is associated with the valve 26, said throttle valve being actuated by a pressure governor 19 which is controlled by the pressure in the discharge pipe of the pump 2 applied through a line 21. A modified arrangement includes a second pilot valve which is normally closed by the pressure in the main pump outlet 7 but is adapted to open to release the pressure on the underside of the piston 10, and thus permit opening of the valve 3, when the pressure in the outlet 7 falls.
Patent GB-546807-A (GB)
Title: Nut-holding device
IPC: F16B37/04
Filed: 1941-07-30
Abstract: 546,807. Anchoring nuts. TINNERMAN PRODUCTS, Inc. July 30; 1941, No. 9675. Convention date, Feb. 20. [Class 89 (i)] A device for anchoring nuts and applying them to a member to be bolted particularly when access can only be had from one side is made from tempered spring or cold rolled sheet material. The nut &c. N, Fig. 3 is gripped between arms 1, 2, each of which is apertured for the bolt and is retained by flange 6. The arm 10 that effects attachment to the part has a curved flange 13 to enter the bolt hole; the upper edges being shaped as shown to facilitate application. In a modification the arm 1 may be provided with thread engaging tongues or other means for locking the bolt. In a further modification the nut is clamped between a tongue 33 and the pawl 1 which has flanges 32, and locking tongues 21, 22. The nut may be held between tongues 41, Fig. 12, engaging its top surface and tongues 43 engaging slots in opposite sides.