baber/WOPTO huggingface dataset:
Patent GB-768450-A (GB)
Title: Means for use in the teaching of arithmetic
IPC: G09B19/02
Filed: 1954-03-22
Abstract: 768,450. Educational appliances. ROSS, H. M. March 22, 1955 [March 22, 1954], No. 8302/54. Class 146(2). A series of numerals 1-9 for use in teaching arithmetic are constructed to present a number of angles equal to the numerical value represented, and a hole or recess a associated with the or each angle for the reception of a peg, ball or the like. The numerals may be separate cut-out bodies, represented upon a single board by printing or embossing, or they may be mounted on blocks b, as shown. Representation of the cipher 0, having no recesses, may also be provided in a set of numerals. In an embodiment described in the Provisional Specification, the numerals are formed in <SP>3</SP>/ 16  inch plywood and each angle bears a radius in which a # inch hole is drilled.
Patent GB-104802-A (GB)
Title: Improvements in Twist Lace and in the Method of Making the same.
Inventor: PARE FREDERICK WILLIAM
IPC: D04C5/02
Filed: 1916-06-14
Abstract: 104,802. Pare, F. W. June 14, 1916. Lace. -- Consists in the production of a " roundhole " net of finer gauge in a Levers or go-through machine having one right and one reverse twist thread to each bobbin thread, by forming two pillars to every three bobbin threads, instead of four. Alternate pillars contain a single bobbin thread b, e, whilst the intermediate pillars contain a pair of bobbin threads c. The other threads are divided as indicated, to equalize the total number of threads in each pillar. Gimping threads carried by additional bars may be introduced for thickening bobbin-fining effects or for patterning effects.
Patent GB-1000487-A (GB)
Title: Improvements in and relating to web winding and unwinding machines
Inventor: JONES OWEN HERBERT
IPC: B65H23/182
Filed: 1962-03-05
Abstract: 1,000,487. Feeding webs. BEASLEY, FRENCH & CO. Ltd. June 5, 1963 [March 5, 1962], No. 8377/62. Heading B6B. A web take-up spool 26 is driven from a shaft 11 associated with a printing or other machine through a slip clutch 15 and a variable speed mechanism 23. The clutch is arranged for a 2% slip. When the tension tends to increase as the web roll increases in diameter, the clutch tends to slip to a greater extent, thereby rotating a shaft of a differential unit 32 connected between the input and output gears 17, 19 of the clutch. A cam 41 on the shaft is thus rotated and through a roller 43 and linkage 42, 49, 51 decreases the speed ratio of the mechanism 23 to counteract the tension-increasing tendency. If the web is unwinding, the tendency to reduction of tension is similarly compensated for. When the roller 44 reaches the highest point of the cam, as shown, it is locked in position by a latch 54, releasable by a lever 59 against the action of a weight 55.
Patent GB-1222661-A (GB)
Title: Optical measuring apparatus
IPC: G01B11/02
Filed: 1968-02-21
Abstract: 1,222,661. Photo-electric position measurements. ITEK CORP. Feb. 21, 1968 [March 29, 1967],  No.8423/68. Heading G1A. In a photo-electric apparatus for measuring the position of a surface, which may be diffuse, two spots of light are projected upon the surface which are superimposed when the surface is at a desired position but separate as the surface moves away, two photodetectors view the surface to detect when and by how much the spots separate. Each spot moves in opposite directions for the forward and backward movement of the surface and by differently modulating the two beams creating the spots each spot can be identified and so reveal the direction in which the surface moved. A servo system may reposition the apparatus to restore the surface to its nominal position relative to the apparatus. The angular position of the surface is determined by comparing the intensities of the two spots. In Fig. 3 two beams 12 and 13 are produced by apertured plate 35 from a tungsten or xenon lamp 30 and are projected by lens 47 as two spots on the surface which are superimposed if the surface is at the focal point of the lens 47, that is its nominal position. Two detectors 44 and 45 view via reflecting truncated prism 40 different portions of the surface, either side of the optical axis 11. The two beams 12 and 13 are alternately interrupted by chopper 31 and beam 12 provides via photodetector 38 a reference signal to phase sensitive rectifier 23. As the surface moves away from position the two spots separate and pass into the field of view of the detectors 44 and 45. The detector outputs are fed to a differential amplifier whose output signal is an alternating one having an amplitude dependent upon the extent of surface movement from and a phase dependance upon the direction. The signal is synchronously rectified at 23. Fig. 7 shows a modified arrangement when the two detectors 51 and 52 view the surface via a reflecting prism 53 and partially reflecting mirror 50. Both spots are viewed via mirror 49 by a photo-detector 54, whose output is an A.C. signal of amplitude dependent upon the angular position of the surface. The reference signal in this instance is provided by two detectors 55 and 56 receiving parts of the transmitted beams via mirror 49. Instead of a chopper two light sources may be alternately energised.
Patent GB-163182-A (GB)
Title: Improvements in and connected with staging appliances for use in suspending ladders in front of structures such as houses for painting and other purposes
IPC: E06C1/397
Filed: 1920-03-22
Abstract: 163,182. Prince, A. March 22, 1920. Ladders.-Staging appliances for suspending ladders &c. c, d parallel to the walls of a building &c. or to a girder comprise one or more horizontal members a suspended at intervals from vertical members b. The members a, b are made of flexible material such as wire &c. rope and are attached to the building at the points a'. The ladders c, d are suspended from the wires &c. a by means of hooked brackets lashed to the ladder sides and carrying rollers e. The ladder c may be held parallel with the wall by guy ropes g. The short ladder d is for the purpose of suspending the operator while moving the work ladder c along the runner. For high buildings, a series of members such as a, b may be provided, the work ladders being long enough to reach the lowest member a, the same ladders being used again at a higher level.
Patent GB-596919-A (GB)
Title: Improvements in and relating to regenerative braking of d.c. motors supplied from a.c. mains
IPC: H02P7/26
Filed: 1945-04-05
Abstract: 596,919. Control of D.C. motors. GENERAL ELECTRIC CO., Ltd., GALLIZIA, E., and THOMPSON, W. G. April 5, 1945, No. 8448. [Class 38(iii)] [Also in Group XXXV] A D.C. motor supplied from A.C. through controlled vapour electric arc converter apparatus is associated with a synchronous powerfactor-correcting condenser coupled to an auxiliary motor so that the main motor may be braked by regenerated current supplied to the auxiliary motors. As described four D.C. motors 1-4, in two series pairs drive the fan of a wind tunnel 7 and are supplied through two sets of grid-controlled rectifiers 17, 18 with arrangements for series parallel control of the motor armatures. The speed of the fan motor is automatically controlled by pilot meters 51, 52 operating through a phase shifter 45 on the grid circuit of the rectifiers, and a manual phase shifter 44 provides " inching " control, a rapid control means 49 provides gust correction. The motor bus-bars 9 are connected also to two series connected motors 72, 73 coupled to a synchronous condenser 63 and the excitation of these motors is provided by an auxiliary rectifier 61, the grid voltage of which is controlled by a tachometer generator 80 so that the excitation varies with the speed of the fan motors and the motors 72, 73 maintain a small load on the bus-bars to render regeneration rapidly available. The excitation of the condenser is furnished by an exciter 65 and. controlled by means 68 including a power-factor relay. The excitation of the fan motor is provided by a D.C. generator 70 or an auxiliary rectifier 59, both being controlled by a constant current relay 82. During regenerative braking the motors 72, 73 may be arranged to absorb only sufficient power from the fan motors to balance the motoring losses of the syncronous condenser or they may drive this machine as an alternator to return energy to the line. Regenerative braking of the fan motors is obtained by reduction of the output voltage of the main rectifier and increase of the output of the auxiliary converter 61 and may be initiated by relays responsive to any attempt of the main motors to feed back energy to the rectifiers 17, 18. Dynamic braking is obtained by isolating one bus-bar 9 from the main rectifiers and closing a switch 85 on to a braking resistance 84 which may be short-circuited by a switch 86.
Patent GB-622108-A (GB)
Title: Improvements in or relating to the production of planographic printing plates
IPC: B41N3/03
Filed: 1946-03-19
Abstract: 622,108. Coated paper. ABBEY, A. (Newman, D. A.). March 19, 1946, No. 8507. [Classes 96 and 140] [Also in Group XVI] A planographic printing plate comprises a paper base provided on its printing-face with a coating of carboxymethylcellulose or a salt or derivative of a carboxymethyl ether of cellulose, which is insoluble when the plate is used. A sodium salt may be applied as an aqueous solution, an insolubilizing agent being added to the solution included in the paper, applied over the film or added to the damping- fluid of the machine, or either an ammonium salt or an aluminium salt in solution with ammonium hydroxide is applied followed by heat treatment to drive off the ammonia. The coating solutions may comprise inert fillers such as china clay, plasticizers, such as glycerine, and/or alcohol, to accelerate drying and solidifying of the coating. Water-leaf strip from a paper-making machine may be passed through a size tub containing melamine, a methylol urea or lower polymers of urea formaldehyde, or a urea formaldehyde with or without a sodium salt of a carboxymethylcellulose; alternatively, a colloidal slurry of these substances may be added to the paper pulp. A specific example of a coating-composition comprises low viscosity sodium carboxymethylcellulose, china clay and glycerine. In a further example, solutions of sodium carboxymethylcellulose and aluminium sulphate are mixed together, and a solution of ammonium hydroxide, glycerine and china clay are added to the resultant precipitate. The back of the printing plate may be water-proofed by means of a solution of Styron in ethyl acetate.
Patent GB-893708-A (GB)
Title: Improvements in the production of filaments, films and like products
IPC: D06M13/188
Filed: 1960-03-10
Abstract: 893,708. Cellulose ester spinning solutions and melts. CANADIAN CELANESE Ltd. March 10, 1960 [March 16, 1959], No. 8543/60. Addition to 791,367. Class 2(2) Solutions of cellulose esters of aliphatic acids containing 2-4 carbon atoms made by the method of the parent Specification are extruded, with or without dilution, through shaping orifices into a coagulating bath, or into an evaporative atmosphere, to form filaments, films and like products. Alternatively the cellulose ester may be precipitated from such solutions, washed and dried, ground if necessary, and melt-spun. Spinning solutions of cellulose triacetate in acetic acid, or in a mixture of acetic acid and acetic anhydride, with or without dilution with acetic acid, and filtered if necessary, may be dry-spun, or wet-spun into an aqueous solution of acetic acid sufficiently dilute to coagulate the cellulose triacetate. Cellulose triacetate may alternatively be precipitated from solution, treated as described above, and melt-spun, In melt-spinning. the cellulose ester may be melted by heat derived from the spinning plate, through which an electric current is passed.
Patent GB-315897-A (GB)
Title: Means for identifying travellers' luggage and the like
IPC: G09F3/14
Filed: 1928-03-21
Abstract: 315,897. Stocks, D. M. March 21, 1928. Facilitating identification of goods.-To enable travellers' luggage to be readily identified, the suit case, bag &c. is formed with an aperture in which is secured, during manufacture, an identification device a on the surface of a piece of leather &c., a label b with a similar identification device being secured to the key of the suit case &c.
Patent GB-581136-A (GB)
Title: Regeneration of vulcanised natural and synthetic rubbers
IPC: C08J11/28
Filed: 1942-06-24
Abstract: Vulcanized natural or synthetic rubber is regenerated by treatment with steam under pressure, e.g. with live steam at 50lbs. per sq. in. for an hour in presence of an alkylolamine or a wetting agent added before or after comminution.  As wetting agents may be used acids or salts, the molecule of which includes the hydrocarbon radical of a naturally occurring oil or fat and a sulphonic or carboxylic group, e.g., cetyl sulphonic acid, acid sulphuric esters of cetyl and oleyl alcohols, oleyl ester of b -hydroxyethane sulphonic acid, oleyl p-anisdine sulphonic acid or stearic acid, or quaternary ammonium salts in which the hydrocarbon radical of an oil or fat forms the whole or part of a substituent attached to the nitrogen atom, e.g., dodecylpyridinium bromide, cetyl pyridinium bromide or trimethylcetylammonium bromide, or water-soluble compounds containing a chain of three or more -CH2-CH2-O-radicals, e.g. the product of the condensation of cetyl alcohol with seventeen molecular proportions of ethylene oxide or of b -naphthol with ten molecular proportions. Vulcanized or cured synthetic rubber-like materials which may be treated include polymerization products of butadiene or chloro derivatives alone or with styrene; acrylonitrile, ethyl acrylate &c. products of the reaction of alkali polysulphides with aliphatic compounds containing two atoms of halogen, e.g. ethylene dichloride, glycerol a -b -dichlorhydrin or b -b -dichloroethyl ether, or the product described in Specification 580,524, [Group IV].
Patent GB-236623-A (GB)
Title: Improvements in tri-colour photographic cameras
IPC: G03B33/00
Filed: 1924-04-07
Abstract: 236,623. Rendall, H. E. April 7, 1924. Colour photography. - In tri-colour cameras employing inclined transmitting reflectors, each reflector is mounted in direct contact with a heavy rigid bearing frame as of machined metal from which it can be readily removed for cleaning &c. In the form shown, each reflector A is held by lateral metal strips on a bearing frame B supported by four discs b<1> pressed by springs c abutting against a frame D secured to the camera wall. The position of the reflector is adjusted by screws e engaging strips or discs e<1> bearing against the face of the reflector, and after the adjustment screws c<1> are screwed down upon the discs b<1> and serve to determine the position of the reflector. In a modification, the bearing frame rests, during adjustment by the screws e, against a buttress bearing upon springs abutting against the frame D, and the reflector is secured in the set position by a buttress screwed to the camera wall on the side of the reflector remote from the frame D. A modification is also described in which the bearing frames B are triangular in section in a plane at right-angles to the two reflectors, and the adjusting screws are seated in the wall of the camera. Wedges may be employed instead of screws for adjusting the reflectors.
Patent GB-127348-A (GB)
Title: Improvements in Chronotelemetrical Apparatus for use in Regulating the Firing of Anti-aircraft Guns.
IPC: F41G5/08
Filed: 1917-06-16
Abstract: 127,348. Maison Breguet, and Routin, J. L. Aug. 9, 1916, [Convention date]. Addition to 127,280. Sights and methods of sighting.-Consists in transmitting the observed angles from one station to another in the long home-base range-finder forming part of the anti-aircraft gunnery apparatus described in the parent Specification by means of luminous signals or Hertzian waves. When luminous signals are employed, the indicator at the transmitting-post may comprise a board, Fig. 4, carrying a number of electric lamps L controlled by a commutator switch e, f actuated by the observing-telescope, so that the grouping of the ignited lamps indicates the direction of the telescope. This direction may be reproduced at the receiving-post without taking a reading, by making use of a duplicate lamp-board similarly connected to the alidade of the miniature triangle. The two boards are viewed through a telescope having a reflecting-prism to bring the images into position for comparison, and the alidade is moved until the two boards agree. In a modification, Figs. 2 and 3, the indicator comprises a number of drums a, b, c, each bearing figures from 1 to 9, arranged to be seen through an opening in a board d. The drums are set by hand.
Patent GB-311873-A (GB)
Title: Improvements in and relating to counting apparatus
IPC: H04M15/10
Filed: 1928-07-13
Abstract: 311,873. Newbon, H. A. July 16, 1928. Counters of scoring type; transfer-mechanism. -Various forms of simple counters are described each comprising two numeral drums on separate spindles, or one on the other, one drum registering multiples of the numbers on the other. In Fig. 1 the drums c, b are supported in a casing a by separate spindles f, u having a bearing in a central partition l. Each drum may be independently turned therefore, for registering or zeroizing, by means of the knobs d, e. Transfer is effected by a toothed cylinder q held in place in the partition by a circular ring on the lower drum, a tooth m of which rotates the cylinder and so the higher drum by engaging a wheel k on the cylinder. Both drums are subject to a retarding or reversal-preventing detent h, s. In the form shown in Figs. 2 and 3 there is no partition and the drum shafts bear in each other. Transfer is effected by a blade spring z on the lower drum held by pins v and forced at transfer against the toothed wheel r of the higher drum by a depression x on the casing. The drums may be in the form of engaging shells, Fig. 4, and circular series of holes in a base member y cooperate with knobs n<1>, s<1> carried by springs attached to the shells. One knob n<1> is forced, at transfer, to engage a hole in the higher drum. In the examples shown the lower drum bears numbers up to 39 and the higher drum of greater width carries the number 40 and multiples thereof.
Patent GB-751527-A (GB)
Title: "improvements relating to pre-combustion chamber diesel engines"
IPC: F02B23/04
Filed: 1954-03-25
Abstract: 751,527. Combustion chambers. DAIMLER-BENZ AKT.-GES. March 25, 1954 [March 25, 1953], No. 8782/54. Class 7(3) A precombustion chamber 12, has, or approximates to, the form of a body of revolution flattened in the axial direction so that its axial length is less than its diameter and is provided with a transfer passage 13 which communicates with the main combustion chamber 17 through throttling ports 14, the axis of the transfer passage, being arranged so that a vortex is produced in the precombustion chamber by the entering air. The precombustion chamber is formed in an insert 11 fitted in the cylinder head and an insulating space 23 is provided between the flattened end walls 20, 21; and the water-cooled cylinder head. The end wall 20 is formed by a cover plate welded in position after machining of the interior of the precombustion chamber 12. The jet of fuel from a nozzle 22 is directed in the same sense as the rotating air. In a modification the axial length of the precombustion chamber is approximately equal to the width of the transfer passage 13.
Patent GB-492967-A (GB)
Title: Improvements in and relating to envelopes
IPC: B65D27/16
Filed: 1937-03-25
Abstract: 492,967. Envelopes. HAAS, A., and PIRIE, APPLETON, & CO., Ltd. March 25, 1937, No. 8815. [Class 146 (ii)] A self-adhesive envelope has parts a<1>, b<1> of the front and back walls a, b respectively, projecting beyond a straight mouth and coated with dry sealing adhesive on their inner sides, and premature sealing of the parts a<1>, b<1> is prevented by the provision of an uncoated slip c of paper which is attached to the inner surface of one of the walls a, b and adapted to lie between the parts a<1>, b<1> until the envelope is ready for use, when the slip can be removed by tearing it along a weakened line d provided therein. To facilitate opening the envelope, the parts a<1> b<1> may be perforated &c. at a<3>, b<3>.
Patent GB-1398223-A (GB)
Title: Optical scan arrangement for optical character recognition
IPC: G06V10/12
Filed: 1973-02-22
Abstract: 1398223 Optical scanning OPTICAL BUSINESS MACHINES Inc 22 Feb 1973 [8 March 1972] 8839/73 Heading G2J [Also in Division G4] A character recognition system comprises an optical scanner in which a light beam, having a cross-section which is slightly larger than the character field height in one direction and very much less wide than the character field in the other direction, is swept over the character so that one sweep illuminates all portions of the character field. Part of the light paths from the light source to the field and from the field to photosensors is common. Mechanism is provided to compensate for skew of the beam and for  changes of focus during the scan. Light from a low power laser 10, Fig.1, is formed into an elliptical-section beam by cylindrical lens 11. The beam passes via prism 12 and oscillating mirror 14 to scan over a row of characters on a document 16. The axis of rotation 17 of mirror 14 is inclined to the plane of the document so that specularly reflected light is not returned to the mirror. A consequence of the tilting is that the major axis of the spot of light falling on the document becomes skewed relative to the character as it moves from centre position 27' towards end positions 21, 33'. It is necessary to compensate for the skew lest the columnar array of photosensors 19 shall provide incorrect outputs. The compensation is effected by oscillating the array in synchronism with the mirror 17, as described below. Further, it is necessary to compensate for change in focus as the light spot moves from the centre position; this is done by reciprocating lenses 13, 18 which direct the light reflected from the document to array 19. The lenses are mounted in an assembly 50, Fig.6, mounted on resilient legs 48 so that the assembly is reciprocable along the optic axis by motor-driven cam 43. A second cam 42 oscillates mirror 14, and is coupled via rod 57 and bell-crank 58 to array 19 to oscillate it about the optic axis.
Patent GB-151558-A (GB)
Title: Mail delivery apparatus
IPC: B61K5/06
Filed: 1920-03-26
Abstract: 151,558. Rushing, J., Blair, A. T., and Hargis, J. E. March 26,1920. Transferring articles to trains.-Station apparatus for delivering mail-bags &c. to a passing train comprises a sack-supporting arm 14, Fig. 2, pivoted to a stem 13 slidable vertically within a post or casing 12 normally supporting the arm, and means such as a bell-crank lever 19, rods 20, 21, 22, Fig. 3, and a second bell-crank lever 28, for moving the stem 13 so as to cause the arm 14 to fall, operated through the medium of a plunger 25 located on the track and co-operating with a cam 27 carried by the tram. The cam 27 is normally raised to an inoperative position, but is depressed when required by means of a foot pedal 34. The arm 14, when supporting a sack 17, is held in the horizontal position by resting on the lower edge 15" of a bayonet-slot 15, Fig. 4, formed in the casing 12, and tilts downwardly to discharge the sack when the stem 13 is elevated. When the apparatus is not in use, the arm can be folded into the vertical position of the bayonet-slot.