baber/WOPTO huggingface dataset:
Patent GB-147389-A (GB)
Title: Improvements in headlight dimmers
IPC: F21V11/16
Filed: 1919-11-12
Abstract: 147,389. Letchford, P. H., and Saltmarsh, G. H. Nov. 12, 1919. Lantern fronts; reflectors.-The lower half of a head-light glass and that part directly in front of the source of illumination are masked by an opaque member 1 from which a slightly inclined U-shaped reflector 5 extends rearwardly beneath the source of illumination. In one form, the member 1 is provided with peripheral notches 3 for receiving the clips 9, which hold the glass in the ring 7. In a modification, the masking is effected by rendering a part of the head-light glass opaque, and the reflector is formed in one with the headlight glass.
Patent GB-729308-A (GB)
Title: Improvements in or relating to scissors
IPC: B26B13/28
Filed: 1951-11-29
Abstract: 729,308. Scissors. KRUSIUS, E. Nov. 29, 1951 [Dec. 6, 1950 ; Jan. 2, 1951 ; June 6, 1951 ; July 31, 1951], No. 28077/51. Class 30. A pair of scissors comprises two pivoted blades each of which has a smooth continuous inner surface extending from the tip to the junction of the blade with the finger bow, the surface being machine ground, glazed or polished in a single operation, and an artificial half moon connected to the inner surface of one blade between the pivot and the finger bow. As shown, the inner surface 1 of each blade is ground concave, smooth and continuous from the point 2 to a position 5 near the finger bow 4, each blade having a rounded outer surface 7 faceted at 8. A depression 11 receives an end 10 of an artificial half moon 9 of sheet steel which is secured by the pivot screw 6. Several blades may be produced at one time by fixing them in a holder and moving the blades over a continuously moving grinding surface. In a modification, the pivot is located very close to the finger bows to increase the length of the cutting edges which are arcuate to render the angle between the cutting edges constant. In further modifications, the outer surface of the blade has two or three facets each of which can be ground, glazed or polished in a single operation and in one form having two facets, one facet is hollow ground and may be ground glazed or polished simultaneously with the inner surface by passing the blades between two shaped grinding wheels. The artificial half moon may comprise glass or ceramic members welded, soldered or glued in the blades which are of substantially constant transverse cross -sectionthroughout their length and may be hardened over their entire length, including the bows, in a single operation, without warping.
Patent GB-458744-A (GB)
Title: Improvements in and relating to cathode ray tubes
IPC: H01J29/46
Filed: 1935-03-19
Abstract: 458,744. Discharge apparatus. KEYSTON, J. E., Andora, Pield Heath Road, Hillingdon, and NICOLL, F. H., 17, The Drive, Ickenham, both in Middlesex, and KLEMPERER, O., 70, Syke Ings, Iver, Buckinghamshire. March 19, 1935, Nos. 28088/36 and 28089/36. Divided out of 458,746. [Class 39 (i)] In cathode-ray tubes with electrons focused into a narrow beam and deflected to scan an equipotential screen 1 which is not spherical with its centre in the region of deflection, for example, a fluorescent screen or an inclined mosaic screen for television transmission, an inhomogeneous field d is produced in the path of the beam between the region of deflection and the screen 1 to increase the effective focal length of the lens 22, 24 for rays b directed to more distant parts of the screen 1 and so keep the beam sharply focused throughout its deflection over the screen. As shown, the inhomogeneous field is produced between a symmetrical silvering 27 on the walls of the tube and an inclined ring coating 28 near the screen 1 and may be an accelerating or retarding field. The surface of the screen 1 takes up the potential of the ring 28 due to secondary emission. In an image dissector for television transmission in which electrons are accelerated from a photo-electric cathode to a positive apertured diaphragm and are focused to form an electron image at the diaphragm by an electromagnetic lens, a steady inhomogeneous magnetic field is produced between the cathode and diaphragm to reduce changes of focus of the electron image at the aperture as the image is deflected over the aperture to be scanned thereby and as the distance travelled by the electrons from different parts of the cathode to the aperture consequently varies. The inhomogeneous magnetic field is stronger near the axis of the tube and may be produced by superimposing on the uniform field of a coil surrounding the tube the field of a permanent magnet or auxiliary coil. Specifications 445,094 and 458,746 are referred to. One Provisional Specification describes also fluctuating the focal length of the electron lens of an image dissector as described in Specification 458,746.
Patent GB-1400623-A (GB)
Title: Circuit for determining the condition of a load
IPC: G03B9/00
Filed: 1972-06-15
Abstract: 1400623 Automatic control of temperature WAYNCO Inc 15 June 1972 28096/72 Heading G3R The change in resistance of an electric heater is used as a measure of its temperature which is to be controlled. The heater 20 is fully energized from A.C. supply lines 14, 15 via a triac 50 controlled in dependence upon the output of a bridge circuit 10 which includes the heater 20 and a desired temperature setting potentiometer 17. During periods when the triac 50 is off, the bridge will sense the heater resistance, a current pulse passing through the bridge each half-cycle of the supply when the line 14 is negative with respect to line 15. The bridge unbalance is sensed by a differential amplifier 27. If the heater temperature is too low the amplifier will have a positive output which charges a capacitor 33. When C33 is charged to a predetermined level it turns ON a transistor 34 of a flip-flop circuit and thereby a capacitor 42 is charged. When the charge in C42 reaches the threshold voltage of a U.J. transistor 46, the transistor is fired and a trigger pulse is applied to triac 50 via a transformer 47. As long as C33 is charged, C42 will repeatedly trigger the U.J. 46. When the amplifier output is such that C33 no longer receives a charge and so long as the charge in C33 has not dropped below the critical voltage level of the flip-flop, the U.J. 46 will continue oscillating and the triac will be triggered ON even during the negative half-cycles of the supply when line 14 is negative with respect to line 15. During the time line 14 is positive a transistor 31 will conduct and clamp the amplifier output to the potential of line 15 thus preventing any amplified noise from charging C33. In addition this prevents charging of C33 during positive halfcycles when the triac is conducting. Zener diodes 54, 55 protect the amplifier and diodes 19, 22 protect the bridge when full supply voltage is applied to the load 20. The other bridge components are effectively by-passed when the load 20 receives power via the triac. Alternatively, the load impedance may vary with humidity or pressure.
Patent GB-275833-A (GB)
Title: Improvements in machines for coating boards or the like with colour, paint or the like
IPC: B05C1/02
Filed: 1926-11-08
Abstract: 275,833. Franz, J. Nov. 8, 1926. Coating-machines.-In a machine for coating boards &c. in which coating material is applied to different faces, separate spray or brush devices fed from separate supply vessels are used. In the machine shown in Fig. 1. the desired colours are introduced into troughs 3 and 4, and the board &c. passed into the machine over roller 36 and between lateral guide rollers 12. The feed roller 6 is adjusted by a handle 10, so that in conjunction with pressure roller 11, the board is fed forward under the spray 16, fed by pump 14. The colour is distributed by brushes 19, and any which runs to the edge is stripped off by the brushes 17 and 18 and spread on the edges. The board is then pressed by the rollers 21 against guide rollers 25. - 27, and a rotary brush 29, fed by a roller 28 in the trough 4, coats the lower surface, the colour being distributed by brush 31. Further distributing and stripping brushes 33, 34, 35, are provided. Agitating means such as the device shown at 30 may be furnished in the troughs, and a stripper plate 40 to remove surplus colour from the brush 29 is provided. The rotary members are driven by an electric motor 37. In the modification shewn in Fig. 3, the trough 43 is mounted on wheels 44 which allow it to be run out from one side of the machine. The trough also carries the bearings for the rotary brush 47. The feeding brush 46 and the agitator 45, and by means of external gear wheels and a clutch partly mounted in the frame and partly on the trough, all the devices are rotated by the motor 54. Wheels 55 to render the whole machine movable, and rotary brushes 56 for cleaning purpose, may be provided.
Patent GB-387043-A (GB)
Title: A tent combined with collapsible field beds
IPC: A47C17/70
Filed: 1931-10-09
Abstract: 387,043. Combined beds and tent frames. HARGREAVES, T. F., 28, Southampton Buildings, London.-(Mager, L. ; 8, Graimbergweg, Heidelberg, Baden, Germany.) Oct. 9, 1931, No. 28148. [Class 20 (i).] A tent combined with collapsable field beds in which the beds, or series of beds, are separated by a space, has the inner posts of the beds connected by stays, the posts being provided with ground plates. The horizontal bars 1, 2 for the bedding material 3, 4 are formed with socketed ends which are superposed and through which, and sleeves 8, pass the corner posts 6. The sets of beds are connected at their inner top corners by stretchers 11 and the ends of the top beds and the spaces between are spaced by bow pieces 13 to support the tent covering material. The bows 13 at the ends of the beds are of the same length as the bars 1 of the beds, while the bows 13 between the sets of beds are formed in two parts, each as long as the other bows, so that the bars may be readily packed. The lower ends of the corner posts are fitted with flat plates 9 to bear on the ground.
Patent GB-1487592-A (GB)
Title: Biscuit manufacture and packaging
IPC: B65B23/12
Filed: 1975-05-15
Abstract: 1487592 Spacing biscuits on conveyer belts UNITED BISCUITS (UK) Ltd 15 May 1975 [25 June 1974] 28234/74 Heading B8A Biscuits a 1 , a 2 , a 3  ..., in a row A; b 1 , b 2 , b 3  ..., in a row B and c 1 , c 2 , c 3  ..., in a row C, on a conveyer belt 10, are brought from random spacing, into alignment, by the action of first and second sets of obstructing pins 15, 16, co-operating with respective sets of recesses 13, 14, in side walls 12 defining the rows. In operation, the first set of pins 15 are in obstructing position (Fig. 1) and the second set are within their associated recesses 14. Biscuit b 1  is therefore held against movement, and biscuits a 1  and c 1  move on until they are held by the other pins 15 (Fig. 2). The pins 15 are withdrawn into their recesses 13, and the pins 16 are moved into obstructing position. The biscuits a 1 , b 1 , c 1  thus move into alignment (Fig. 3). Eventually each aligned row of biscuits proceeds at a spacing of one biscuit length from the preceding row (Fig. 6, not shown). The pins 15 and 16 are mounted so as to be movable into and out from the respective sets of recesses 13 and 14, alternately by the action of linkage 37 (Fig. 7). The mounting of each pin may be adjustable by a screw 29 against the loading of a spring 30. Each pin itself may be of flattened, curved, or wedge shape and may be of resilient material.
Patent GB-1042274-A (GB)
Title: Alternating-current motors
IPC: H02K17/10
Filed: 1963-07-17
Abstract: 1,042,274. A.C. motors. LICENTIA PATENT - VERWALTUNGS - G.m.b.H. July 17, 1963 [July 18, 1962], No. 28272/63. Addition to 1,005,766. Heading H2A. The A.C. motor defined by claim 1 of the parent Specification, is modified by providing a plurality of bridge-star circuits all supplied with magnetic flux from a common source and each including four yoke branches and four polepieces P 3 , P 3 <SP>1</SP>, P 4 , P 4 <SP>1</SP>. Another construction is disclosed in which the polepieces are teeth on the periphery of two axially spaced discs.
Patent GB-435505-A (GB)
Title: Removable cutting edges for the shares of ploughs and other earth-working implements
IPC: A01B15/06
Filed: 1934-10-03
Abstract: 435,505. Implements for working land. REYNOLDS, G. M., Converse, Indiana, U.S.A. Oct. 3, 1934, No. 28291. [Class 6 (i)] [See also Group XXII] A removable cutting- part for the shares of ploughs and other implements comprises a body portion having a cutting. edge and shaped to mate with the share, and a single series of fingers supported by the body portion in a plane sub stantially parallel thereto and extending transversely to the cutting-edge, the fingers cooperating with the body portion to form a single channel for the reception of the share. That portion of a removable cutting-part which engages the underside of the share may project farther from the cutting-edge than the portion which engages the upper side of the share. The removable part consists of a bevelled steel blade 1 bent to form a socket 7 for the front of the share 3, and having fingers 8 struck out of it and spaced from it in a plane parallel to it. The share is forced into the channel between the fingers 8 and the sheet 1 and is frictionally engaged by them. In a modification, fingers of steel having a low carbon content, are welded to a plate of steel having a high cabon content, before tempering. The fingers in this case engage the underside of the share. Manganese, vanadium, silicon, chromium, &c. may be used instead of carbon for hardening the steel. The fingers may be perpendicular to the cutting- edge instead of as shown in the Figure.
Patent GB-1270063-A (GB)
Title: Apparatus for opening a sack
IPC: B65B69/00
Filed: 1970-06-11
Abstract: 1,270,063. Sack-opening devices. INDUSTRIEELE HANDELSCOMBINATIE HOLLAND N.V., and T.B.M.A. EUROPE N.V. 11 June, 1970 [20 June, 1969], No. 28291/70. Heading B8C. In a sack opening device, a sack 5 is carried by a V-sectioned conveyer 1, 2 over a knife 4 which cuts the lower surface of the sack. The conveyer may be vibrated and the knife 4 may be stationary or rotary.
Patent GB-685341-A (GB)
Title: Improvements in gastight storage batteries and methods of manufacturing them
IPC: H01M10/34
Filed: 1950-11-20
Abstract: 685,341. Batteries. BUREAU TECHNIQUE GAUTRAT. Nov. 20, 1950 [Nov. 22, 1949], No. 28306/50. Drawings to Specification. Class 53. In order to prevent reversal of polarity of a sealed alkaline accumulator of the nickel-iron type when connected in series with others the negative electrode is given a greater capacity than the positive and at the time of sealing the negative electrode has a greater charge than the positive the difference between the charges being smaller than the difference between their capacities, Specification 677,724 is referred to.
Patent GB-535897-A (GB)
Title: Improvements relating to fluorescent materials for use in electric discharge devices
IPC: C09K11/63
Filed: 1939-10-20
Abstract: 535,897. Luminescent material. BRITISH THOMSON-HOUSTON CO., Ltd. Oct. 20, 1939, No. 28310. Convention date, Oct, 21, 1938. Drawings to Specification. [Class 39 (i)] Fluorescent material for use in a low pressure, mercury vapour electric discharge lamp comprises (i) 2 to 60 per cent of magnesium tungstate having its fluorescing energy peak within the spectral region between 4200-5200 angstroms, (ii) 10 to 80 per cent zinc beryllium silicate with peak between 5200-6100 A and (iii) 10 to 50 per cent cadmium borate with peak between 6100 and 7000 A. According to the nature of " white light desired particular proportions of the three constituents are specified. The magnesium tungstate comprises about one part magnesium oxide and four parts tungstic oxide ; the zinc beryllium silicate comprises sixty of zinc oxide, forty of silica and two of beryllium oxide, the cadmium borate comprises 41.5 of cadmium oxide and eleven of boron oxide. Specifications 494,852, [Group XX], and 513,570 are referred to. The Specification as open to inspection under Sect. 91 also states that the material may consist of 30 to 95 per cent of zinc beryllium silicate and 5 to 70 per cent magnesium tungstate. This subject-matter does not appear in the Specification as accepted.
Patent GB-319663-A (GB)
Title: Improvements in or relating to the preparation of bituminous emulsions and the like
IPC: C08L95/00
Filed: 1929-09-18
Abstract: 319,663. Lefebvre, C. G. J., and Berger, E. E. F. Sept. 25, 1928, [Convention date]. Emulsions, making. - Bituminous emulsions made with soap are stabilized to permit the addition of fillers thereto by treatment with solutions of alkali salts of weak acids, particularly sodium or potassium carbonate, sulphide, silicate, borate or stearate. The filler may be added, after the stabilizer, to the emulsion, or the emulsion may be poured into a suspension of the filler and a stabilizer in water. Examples of filers are crushed siliceous earth and limestone. The products are employed in road-making and may be fluid or, by increasing the proportion of filler, may be made of putty-like consistency. Specifications 196,950 and 239,922 are referred to. The Specification as open to inspection under Sect. 91 (3) (a) states that the filler may comprise bituminous materials obtained by the crushing of asphaltic rocks or bituminous slates by poor bitumen content. This subject-matter does not appear in the Specification as accepted.
Patent GB-964438-A (GB)
Title: Signal pattern controlled machines
IPC: G05B19/18
Filed: 1961-08-04
Abstract: 964,438. Measuring displacement electrically. BELL & HOWELL CO. Aug. 4, 1961 [Aug. 8, 1960], No. 28371/61. Heading G1N. [Also in Divisions B3 and G3j In a machine for grinding aspherical lenses, the rotating lens blank is moved continuously along the Y axis of the machine by a lead screw and the cutting tool is moved along the X axis in 2. 5 micro-inch steps controlled by incremental pulses recorded on a helical magnetic track rotated by the Y axis lead screw. The control pulses are recorded from a punched tape obtained from a digital computer. The lens blank 26 is rotated by a motor 25 and carried along the Y axis by a carriage 22 mounted on a nut on a leadscrew 21. Leadscrew 21 is rotated continuously by a motor 20 together with a drum carrying a helical magnetic track 29 which has the same pitch as the leadscrew 21 so that a read/record head 28 mounted on the carriage 22 follows the magnetic track 29. On playback, a tool feed pulse from the track 29 is passed to a counter 132, Fig. 9 (not shown) and causes a stepping motor 32 to rotate the tool feed lead screw 31 by one increment, thereby moving the tool 46 by 2. 5 microinches. To compensate for errors on the tool feed lead screw 31, a magneto-strictive device 43, Fig. 7 (not shown) is interposed between the tool mounting 44 and the tool feed carriage 42 and is adjusted so that in the absence of a magnetic field from the winding 107, the tool will normally be slightly to the right of the desired position. The final movement is made by energizing the winding 107 from a transistor amplifier 92 in accordance with the output of a capacitative error detector. This comprises, Figs. 5 and 8 a conductive measuring lead screw 47 accurately mounted against axial and radial movement, and rotated via a bellows coupling by the drive lead screw 31. Co-operating with, but not touching the measuring lead screw 47 is a glass nut 45, with conductive thread faces connected to form a differential capacitor with respect to the profile of the measuring lead screw. An A. C. energized bridge 49 is only balanced when the nut is located symmetrically with respect to the lead screw, and any error causes the magnetostrictive device 43 to be expanded to correct the error.
Patent GB-856770-A (GB)
Title: Improvements in or relating to photographic reproduction
IPC: G03G5/07
Filed: 1958-09-04
Abstract: The Specification describes photoconductive compositions of poly-N-vinyl-carbazole as selfsupporting foils or as layers on supports, for use in electrostatic printing.  The compositions may contain one or more of the following:-ddyestuffs, inorganic acids, organic acids (carboxylic, sulphonic or phosphonic), nitrophenols, acid anhydrides, metal and metalloid halides (other than of alkali metals), boron halides, ketones, quinones, aldehydes, other resins, pigments such as zinc oxide or titanium dioxide, and other photoconductive organic substances.  Many suitable compounds of the above type are listed.  The organic acids, ketones and aldehydes may be aliphatic, carbocyclic or heterocyclic, and may be substituted, e.g. by hydroxy, halogen, nitro, alkoxy, amino or cyano groups. Specified halides are those of aluminium, zinc, iron, tin, arsenic, antimony, magnesium, calcium, strontium, chromium, manganese, cobalt, copper, cerium, thorium, mercury and boron.  The other resins present may be natural (or esters thereof), coumarone, indene, cellulose ether, polyvinyl chloride, acetate, alcohol, ethers or acetals, polyacrylic or polymethacrylic esters, polystyrene, polyisobutylene, polyesters, alkyds, maleic acid, phenol-formaldehyde (especially colophony-modified), urea-formaldehyde, melamine-formaldehyde, aldehyde, ketone, polyamides or polyurethanes.  The poly-N-vinylcarbazole is dissolved or dispersed in a liquid such as water, benzene, methylene chloride, dioxan, chloroform, trichloroethylene, methoxyethanol, butanol, tetrahydrofuran, methanol, ether or toluene, with or without one of the above additives, and coated on the support or cast as a foil.  Examples are given showing as specific additives Rhodamine B, Rose Bengal, Ethyl Violet, Acid Violet, Victoria Blue, a ketone resin, a urea-foramldehyde resin, a polyindene resin, ammonium thiocyanate, mono- and dichloroacetic acids, zinc chloride, toluene-p-sulphonic acid, sulphuric acid, ferric chloride, boron trifluoride, anthraquinone, 2-methyl-anthraquinone, pyrene-3-aldehyde, benzil, indane-1 : 3-dione, acenaphthenequinone dichloride, phthalic anhydride and 1-chloro-anthraquinone.  A developer for the electrostatic image is described, consisting of small glass balls with a minor amount of a "toner" made of a polystyrene resin, a modified maleic resin and carbon black.  The glass balls can be replaced by methyl cellulose.
Patent GB-462060-A (GB)
Title: Improvements in and relating to foam producing apparatus for fire-extinguishing and other purposes
IPC: A62C5/00
Filed: 1935-10-15
Abstract: 462,060. Making foam. CACERES, J., WATSON, R., DURSTON, G. H., and DENNETT, G. A. Oct. 15, 1935, No. 28423. [Class 47 (ii)] A foam-producing device adapted to be fitted readily to a pump, for example a fireengine pump, comprises a short tube a having at one end a collar b to screw on to the pump intake, and at the other end a screw-thread c to receive the intake cover. A chamber d secured in an aperture in the tube has a large inlet e adapted to be connected to a source of water, and a nozzle h provided with a valve i. The nozzle casing is provided with axial or inclined air ports n, which may be valvecontrolled, and with a supply port o for foaming agent. A perforated baffle q is provided between the chamber d and tube a, and the nozzle may be tapered. When the pump is running, water, air, and foaming agent are drawn into, and mixed in, the chamber and tube, the pump completing the foam production. By closing the valve i, water alone may be pumped.