baber/WOPTO huggingface dataset:
Patent GB-511892-A (GB)
Title: Systems for controlling the speed of electric motors
IPC: H01H23/08
Filed: 1938-06-24
Abstract: 511,892. Automatic control systems; rectifying alternating current. SUBMARINE SIGNAL CO. (LONDON), Ltd. (Submarine Signal Co.). June 24, 1938, No. 18790. [Classes 38 (ii) and 38 (iv)] [Also in Groups XXXVII and XXXVIII] Speed. The armature 2 of a motor 1 is supplied with current for one direction of rotation through a grid controlled rectifier 4, and for the other direction through a rectifier 5. The controlling voltage which may be obtained from a hand-driven generator 26 is applied to a resistance 24 having its ends connected one to the grids of the device 4 and the other to the grid of the device 5, while the mid-point of the resistance 24 is connected through a bias 25 to the mid-point of a resistance 13 connected across the motor armature. Normally the rectifiers 4, 5 are non-conducting but upon the application of a voltage from the control 26 one or other is rendered conducting, depending on the polarity of the control voltage. The motor operates in a corresponding direction and is maintained at a constant speed by the control effected on the grid of the effective rectifier 4 or 5 by the back electromotive force which opposes the control voltage. To prevent the conduction of onerectifier from initiating discharge in the other a further rectifier 37 is arranged to connect a resistance 42, or 43 is shunt with the upper or lower halves of the resistance 24. The control voltage applied to the resistance 24 may be obtained from a potentiometer, or it may be an alternating voltage obtained from a machine having a single phase winding and a movable three phase winding, the latter being connected to the corresponding winding of a similar machine excited from the alternating current source. In a modification, Fig. 5, the resistance 24 is connected in circuit with rectifiers 118, 119, supplied from respective alternating - current sources, and having their grids connected to respective secondary windings 116, 117 of a machine 114. This machine has its primary winding 115 connected to the corresponding winding 113 of a machine 111 excited by a winding 112. Control is exerted by movement of the winding 113. Specification 474,705 is referred to.
Patent GB-284548-A (GB)
Title: Improvements in road vehicles
IPC: B60P1/08
Filed: 1927-07-16
Abstract: 284-548. North, O. D., Hugh, P. G., and Scammell Lorries, Ltd. July 16, 1927. Adjusting height of body from ground; suspending and mounting undercarriages; springs and wheels, arrangement of; equalizing load on wheels.-Relates to road vehicles in which the frame extends beneath the axles of the rear road wheels and is arranged to be lowered to the ground and detached from the rear wheel assembly so that the said wheel assembly may be rolled away. Movable plates are arranged at the rear of the vehicle to serve as loading and unloading ramps at the place normally occupied by the rear wheel assembly, the removal of the assembly permitting movement of the plates to the rampforming position. The invention is particularly described in connection with an articulated vehicle consisting of a four-wheeled tractor and a trailer supported at its front end on the tractor by a turntable having provision for allowing the rear end of the trailer frame to be lowered to the ground. The rear end of the trailer is supported on pairs of wheels 4 mounted on coaxial axles 5 beneath which pass the side members 6 of the trailer frame. Each axle 5 is mounted to rock on a longitudinal pivot 7 detachably engaging, at its front end, a bearing 8 pivoted at 9 in the frame member 6 which is of channel section. The rear end of the pivot 7 carries a bearing 10 formed on its upper surface with a hemispherical socket and on its lower end with a groove 17. The socket is detachably engaged by a ball 12 on a screw 13 working in a block 14 carried by a pair of links 15 pivoted on a pin 16 in the member 6, the bearing 10 being held between the ball 12 and pin 16 when the frame 6 is in the normal raised position. To lower the frame, the screw 13 is operated to raise the ball 12 away from the bearing 10, and when the frame reaches the ground a locking plate 19 is removed from an annular groove in the pivot 7 which may then be removed from its bearing 8 so that the wheels can be rolled away. The links 15 are swung down as shown in Fig. 3. Plates 22 hinged together and to the end of the trailer floor at 21 and normally supported by removable struts 23 to form a mud-guard, are then turned down on to the open topped channel members 6 to form ramps. The trailer frame may have a central portion extending between the two pairs of wheels and this portion may be yieldingly connected to the main portion. If a spring suspension is required, the pivots 9 may be spring mounted on the frame, or the bearings 8, 10 may be carried by a longitudinal spring connected near its centre to the axle 5, in which case the bearings may comprise cups formed on the ends of the spring and engaging a front ball on the frame and a rear ball on the screw.
Patent GB-834218-A (GB)
Title: Improvements in or relating to an age hardenable austenitic alloy and articles employing same
Inventor: DYRKACZ WASIL WILLIAM
IPC: C22C38/38
Filed: 1956-06-19
Abstract: An age-hardenable austenitic alloy, suitable for use as parts of gas turbines or as valves for internal combustion engines, has a composition in per cent by weight within the following range: .C.0.55-0.65 .Mn.7.5-10.0 .Si.0.45-0.6 .Cr.21.0-22.5 .N.0.3-0.4 .Fe and impurities the balance..  To improve machinability one or both of S and Se may be present up to 0.15 in total.  Impurities such as P, Cu, S, Co, Ni should not exceed 1.5 in total.  The alloy may be solution treated in the range 1900-2300 DEG F. for 1/4 -8 hours, quenched and hardened in the range 1200-1600 DEG F for 1/4 -48 hours. Quenching may be replaced by air cooling in the case of thin sections.
Patent GB-705551-A (GB)
Title: Diazotype photoprinting material
Inventor: JR JOHN SULICH
IPC: G03C1/60
Filed: 1952-07-28
Abstract: 705,551. Photographic diazotype material. GENERAL ANILINE & FILM CORPORATION. July 28, 1952, No. 19008/52. Class 98(2) A base material such as paper, cardboard, plastic film, cloth, metal or glass is precoated with a suspension of non-colloidal finely divided precipitated silica of particle size of .1 to 10 microns and a weight average particle size of 1 to 5 microns in an aqueous solution of a film-forming lyophile basic-to-amphoteric nitrogenous polymeric binder the weight rates of silica to binder being from 1:1 to 3:1, dried, and then overcoated with a twocomponent diazotype sensitizing composition containing a light-sensitive diazo compound and an azo coupling component. The silica may be made by dehydration of silicic acid precipitated by acidification of alkali metal silicate solution followed by grinding and grading as by levitation. The binding materials are reactive towards coupling components containing phenolic, enolic hydroxyl, sulphonic or carboxylic groups and include casein, soya protein, gelatin, glue and synthetic polymers such as condensation products of formaldehyde with dicyandiamide, guanidine, guanyl ureas, biguanides and melamine. Diazo compounds and coupling components for the sensitizing composition are listed, and the usual stabilizing acids, and salts such as zinc chloride, cadmium chloride or nickel sulphate to prevent premature coupling, antioxidants such as thiourea or thiosinamine, penetration assistants such as methanol, ethanol or isopropanol and water-absorbing components such as glycol, glycerin, propylene glycol or dextrin may be present in the sensitizing composition. Two specific examples use, respectively, a dicyandiamide condensation product and sodium caseinate as binders with the silica and refer to aqueous ammonia and gaseous ammonia development. Specifications 647,617 and 660,088 are referred to.
Patent GB-1271095-A (GB)
Title: A seal for an annular space between concentric pipes
Inventor: BROWN GEORGE
IPC: F16L7/02
Filed: 1969-04-14
Abstract: 1,271,095. Sealing protective sleeves to pipelines; joint-making packing. SOUTHDOWN MEDICAL DEVELOPMENTS Ltd. 3 April, 1970 [14 April, 1969], No. 19027/69. Headings F2B and F2P. The annular space between a pipe 1 and a pipe 2, located within pipe 1, is sealed by an annular resilient sealing member 9, formed with opposed annular shoulders 11 and compressed by means of nuts and threaded studs 12 between annular side support plates 3 and 10, the side support plates fitting over the shoulders 11 and plate 3 mounting a cylindrical projection 8, within which the sealing member 9 and plate 10 are located. Plate 3 is of larger diameter than pipe 1 so that it may be welded to the end of pipe 1 with its central aperture concentric with pipe 2. Sealing member 9 may be of neoprene. Components 3, 8, 9 and 10 may be split radially to facilitate assembly around an existing pipe-line.
Patent GB-460760-A (GB)
Title: Improvements in and relating to marine engine plants
IPC: F01K7/02
Filed: 1936-07-09
Abstract: 460,760. Steam power plants. BAUER,G. July 9, 1936, No. 19055. [Classes 110 (iii) and 122 (iii)] [Also in Group XXXIII] A marine engine plant operating with high pressure high temperature steam and comprising a reversible multiple cylinder reciprocating steam engine is provided with a cooler in advance of the high pressure cylinder through which the main supply steam and the exhaust steam from the high pressure cylinder are led in counter current. The high pressure tandem cylinders 1 are supplied with steam from a connection 10 on the cooler 7 and the exhaust from these cylinders is led into the cooler at 12 in counter current to the main steam which enters at 8. After passing through cylinders 3, 4 steam may be further utilised in the exhaust turbine 5. For the purpose of regulating the degree of cooling of the main supply steam the cooler is provided with a valve 14 whereby the proportion of main steam passed through the cooler may be regulated.
Patent GB-788223-A (GB)
Title: Improvements in or relating to the production of optical filters
Inventor: RING JAMES
IPC: G02B5/28
Filed: 1954-06-30
Abstract: 788,223. Photo-electric control systems. NATIONAL RESEARCH DEVELOPMENT CORPORATION. June 29, 1955 [June 30, 1954], No. 19109/54. Class 40 (3). [Also in Group II] The thickness of the dielectric layers deposited during the formation of an interference filter is controlled by passing through the successive layers a light beam of which the wavelength varies between the extremities of a small range around the selected wavelength and terminating the deposition of each layer when the synchronously rectified D.C. output of a photo-cell in the beam becomes zero. Apparatus for carrying out this method is shown in Fig. 1 and includes a vacuum chamber C in which dielectric material, such as cryalite and zinc sulphide, is evaporated on to a glass plate A from crucibles B. Through this chamber is passed a light beam D so as to be incident on a photo-multiplier tube G. This light beam emanates from a lamp E and a knife edge K is so inclined as to cause a wedge-shaped light patch to be formed over an annular slit I, eccentrically arranged in a rotatable disc J and forming the effective inlet slit of a monochromator comprising a prism F and an exit slit. With this arrangement, as disc J is rotated, light of a different wavelength is continuously presented to the exit slit and thus passes to the filter layer being deposited and to the cell G. When the thickness of the filter is such that the transmission curve is symmetrical about the mean wavelength of the modulated beam, the output of the photo-cell after amplification and synchronous rectification by commutator L is zero. The wedgeshaped patch of light varies the quantity of light passing through the system at each wavelength so as to compensate for the different sensitives of the system at different wavelengths. The process is repeated for each layer deposited. Another way in which the light beam may be modulated is to have an opaque scanning disc containing two concentric halfannular slits of different radii (Fig. 3, not shown), so that the wavelength of the light incident on the plate A is switched abruptly from one value to another as the scanning disc rotates. Alternatively, the monochromator may have two entrance slits which are alternately uncovered as a scanning disc comprising two concentric half annular transparent areas is rotated. In another form, the monochromator may be replaced by a rotatable filter plate consisting of two semicircular interference filters disposed edge to edge and transmitting different wavelengths. The wavelength of the light from the lamp may also be varied by passing the beam through an interference filter, the inclination of which relative to the beam direction is adjustable by a cam. A wedge-section filter whose transmitted wavelength varies longitudinally thereof may also replace the monochromator.
Patent GB-208184-A (GB)
Title: Improvements in controlling mechanism for flying machines
IPC: B64C17/00
Filed: 1922-07-12
Abstract: 208,184. Mitton, R. E. July 12, 1922. Steering, balancing, and regulating altitude.- In controlling mechanism of the kind in which the hand-wheel can also be operated by a pendulum, the levers 3, 5 for looking the hand-wheel 1 and sleeve 2 to the pendulum-operated shaft 16, are held out of operation, against the action of springs 3', to allow the hand-wheel to be moved independently of the shaft, when springs on the levers engage in notches 14, 14<1> on the handwheel. The pendulum 36 can swing about rectangular axes 37, 38<1>. Its lower end is connected to the frame bv dashpots or springs, and its upper end passes through a ball 35<1> supported in a cranked portion 35 of the shaft 16. When the hooked end of the looking-lever 3 engages a longitudinal slot 15, Figs. 3 and 4, in the shaft 16, the sleeve 2 will be rotated by the pendulum for operating the ailerons automatically. When the hooked end of the lever 5 engages a circumferential slot 17, longitudinal movement of the shaft 16 under the influence of the pendulum will be communicated to the sleeve for adjusting the elevator. The sleeve carries a swivel bearing 20 supporting a ball, through which passes a lever 22 which can turn about rectangular axes 23, 25. When the sleeve 2 is moved longitudinally by the pilot or the pendulum, the lever 22 moves about axis 25 and operates the elevator through wire 43 or 44. When the sleeve is rotated, the lever turns about axis 23 and rocks a yoke 30 about a rod 31 to operate the ailerons through wires 53, 53<1>.
Patent GB-994143-A (GB)
Title: Device for varying the length of an electric cable, flex or the like
IPC: B65H75/40
Filed: 1964-05-08
Abstract: 994,143. Reels: taking up slack in flexible elements. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. May 8, 1964 [May 13, 1963], No. 19275/64. Headings B8B and B8M. A reel 3 is rotatably mounted in a housing 1, and slots 7 and 8 in the housing and slot 9 in the flange 4 and hub 16 of the reel form a passage, when the slots are aligned, extending through the hub and reel and having an open side so that a cable to be shortened can be laid therein and wound on the reel by subsequent rotation thereof. Flange 4 is optional. The drum and housing are each an unitary plastics moulding. There may be means to hold the drum in a wound position. Handles 11, 12 are provided to rotate the reel.
Patent GB-407856-A (GB)
Title: Process for preparing light proof pigments
IPC: C09B69/06
Filed: 1933-07-07
Abstract: Light-proof pigments are produced by reaction between basic dyestuffs and cuprous salts, precipitated by means of ferro cyanides and copper salts, the precipitate being reduced and, before drying, submitted to ripening in a weakly acid, neutral or alkaline medium.  The ripening action may be accelerated by heating and, if desired, by the addition of hydroxycarboxylic acids or poly-carboxylic acids or salts thereof. The colours produced are brighter and more resistant to oxidation, and may be used in cellulose lacquers, oil paints and water-paints, and distemper colours.  According to example: (1) rhodamine 6 G extra is precipitated with potassium ferrocyanide, sodium sulphite, and copper sulphate, heated to ripen and dried, the same materials may be used with the addition of sodium carbonate; (2) thioflavin T is precipitated with the above compounds with the addition of sodium oxalate and carbonate to ripen; (3) brilliant rhoduline red B is precipitated as above with the addition of sodium citrate to ripen; (4) crystal violet is precipitated as above with the addition of aluminium hydrate as substrate and heated to ripen; (5) methylene blue is precipitated as above with the addition of aluminium sulphate, sodium carbonate and sodium citrate to ripen.
Patent GB-199961-A (GB)
Title: An improved mount or holder for wire
IPC: B65D85/04
Filed: 1922-07-14
Abstract: 199,961. Bartlett, J. July 14, 1922. Wire holders. -A holder for coils of fine wire, such as picture wire and wire for binding flowers, comprises a plate of tough cardboard, sheet metal or like material provided with a number of tongues 2 and a central eye 4 through which the inner end of the wire is passed.
Patent GB-1088877-A (GB)
Title: Improvements in or relating to protective caps for the ends of pipes
IPC: B65D59/06
Filed: 1965-05-07
Abstract: 1,088,877. Pipe end protectors. FRASER & BORTHWICK Ltd. and D. FRASER. May 6, 1966 [May 7, 1965], No. 19434/65. Heading B8C. A protector cap for the end of a pipe comprises a sleeve 10 having a tapered bore with its larger end at the free end of the sleeve. The other end of the sleeve is closed by a wall 11 having a generally flat outer face, a protective annular flange 13 being provided at the junction of the sleeve and end wall. The lower end 12 of the sleeve 10 may be bevelled to produce a sharp edge. In an alternative form the flange (14), Fig. 4 (not shown), protrudes only from the end wall (11), its outer surface being continuous with that of the sleeve (10). The cap may be moulded from a plastics material.
Patent GB-1471242-A (GB)
Title: Method for removing so2 and nox consecutively from the exhaust of a combustion furnace
IPC: B01D53/50
Filed: 1975-05-08
Abstract: 1471242 Removing SO2 and NO x  from waste gases NIPPON KOKAN KK 8 May 1975 [8 May 1974] 19456/75 Heading C1A SO 2  and NO x  are removed from waste combustion gas by washing the gas with an aqueous solution of ammonium sulphite to remove SO 2  and form ammonium hydrogen sulphite, washing coke oven gas with the thus obtained ammonium hydrogen sulphite solution to remove NH 3  therefrom, recycling the ammonium sulphite solution formed to the SO 2  washing stage, controlling the pH and temperature of the recirculating ammonium sulphite solution to 6À1-6À5 and 50-55 C. respectively in order that the NH 3  content in the gas leaving the SO 2  washing stage is 150-500 ppm, heating the gas to 200-450 C. and catalytically reducing NO x  content to N 2  with the NH 3 . The waste gas may be exhaust from a boiler furnace or an iron ore sintering plant. Suitable catalysts for the reduction of NO x  are oxides of Cu, Cr, Co, V or Fe or preferably a by-product of iron oxide obtained in an iron works, e.g. coarse powders of iron ore, iron oxide scale or coarse powders collected from a dust separator. (For Figure see next page.)
Patent GB-638568-A (GB)
Title: Colour television system
IPC: H04N11/12
Filed: 1947-07-21
Abstract: 638,568. Television. RADIO CORPORATION OF AMERICA. July 21, 1947, No. 19485. Convention date, Jan. 28, 1942. [Class 40 (iii)] In a colour television system in which separate groups of equal band-width signals representative of a plurality of primary colour images are simultaneously generated means are provided for shifting the frequency range of the group of generated signals and for transmitting simultaneously all the groups of signals so that the groups occupy contiguous but separate frequency ranges. The invention is described in connection with a three-colour television system in which green, blue and red colour selection image signal groups generated by picture signal generating tubes 19, 21, 23 are applied to a transmitter 154 over three separate paths in two of which (e.g. red and blue) frequency changing means 39, 41 and 48, 50 are included for shifting the position of the red and blue signal groups so that in the signal applied to the transmitter all three colour signal groups occupy contiguous ranges. To reduce the total band widths of the transmitted signal the band width of the red and blue signal groups may be reduced by up to 40 per cent by including appropriate means such as filters 38, 47 in the red and blue signal channels. It is stated that a reduction of this order in the band widths of the red and blue channels does not produce any noticeable change in definition.
Patent GB-621964-A (GB)
Title: Improvements in coin-freed locks for use with lock-up cupboards located more especially in cloakrooms
IPC: G07F17/12
Filed: 1946-07-01
Abstract: 621,964. Coin-freed lock-up cupboards. METAL FORMATIONS, Ltd., and REEVES, D. G. July 1, 1946, No. 19538. [Class 27] In a coin-freed lock for lock-up cupboards in which articles can be deposited. the door locked and the key then removed for subsequent recovery of the articles, the lock bolt is normally held retracted and, when the door is closed-to, a projecting slide is thrust back by contact with the lock striker plate to release the bolt through the medium of the inserted coin. The bolt is then shot by turning the key which can then be removed. The bolt 11 is held in its retracted position shown by means of a retaining lever 27 which is biassed by a spring 32 to engage a pin 30 on it in a notch 25 in the bolt. A slide 14 mounted above the bolt is loaded by a spring 16 to project from the lock casing and is apertured at 17 to accommodate a coin inserted through a slot 13. On closing the door, the slide 14 is thrust back engagement of its chamfered end with the striker plate, and thrusts the coin against a second pin 28 on the lever 27 which is thus, rocked to free its pin 30 from the notch in the bolt 11. The key can then be turned to shoot the bolt, the key barrel having a pinion 22 meshing with a rack 21 on the bolt. As the bolt is shot a cam 26 on it rides over the 'pin 30 and rocks the lever 27 further to relax the grip on the coin which thereupon falls through an opening in the bolt to the till. When the key is reinserted, and the bolt retracted to open the door for recovery of the articles, the pin 30 on lever 27 re-engages the notch 25 in the bolt which cannot then be shot or the key removed without insertion of a further coin.
Patent GB-274655-A (GB)
Title: Improvements in or relating to means for lubricating chain transmissions of motor cycles
IPC: B62J31/00
Filed: 1926-08-07
Abstract: 274,655. Birmingham Small Arms Co., Ltd., and Poole, H. Aug. 7, 1926. Rotary cylindrical valves; locking-catches.-Oil splashed in the crank case 1 of a motor-cycle engine is collected in a pocket 3 formed by inclined ribs 2 and is led away through passages 11, 4, to lubricate the chain. A regulating-valve arranged in the passage 4 comprises a rotary spring-pressed spindle 10 having at its lower end horizonal and vertical grooves 12, 13 co-operating with the passage 11. Alternatively, the lower end of the spindle may be made eccentric. An operating knob 14 secured to the spindle has a radial projection 15 on its underside adapted to engage a series of radial grooves 16 formed on a socket 17 through which the spindle passes, whereby the valve is retained in adjusted position.