baber/WOPTO huggingface dataset:
Patent GB-1517742-A (GB)
Title: Photographic depth-of-field calculators
IPC: G06G1/00
Filed: 1975-09-19
Abstract: 1517742 Photographic depth-of-field calculators SAMUELSON FILM SERVICE Ltd 19 Sept 1975 [20 June 1974] 26144/75 Heading G4B A depth-of-field calculator is to determine the depth-of-field for a given "circle of confusion" with a particular focal length and stop, aperture, setting with a subject at a predetermined distance. Fig. 1 shows an embodiment where a disc 13 is rotatably mounted on a base 10 and a slide 12 is also mounted thereon. The slide has a slot for co-operation with the pivot of disc 13. The disc has two distance scales thereon 22A, 22B, which correspond to different classes of lens, e.g. fixed lens and zoom lenses. Index curves 24, 24A relate to different values of the "circle of confusion". Line 23 is a focus index line. Scale 20 is of lens focal length values whilst scale 21 is of lens f stops. In use the slide is set so that the intended focal length value and stop value are aligned. The disc is then rotated to align index line 23 with the distance on one of the scales 22A, 22B, as appropriate, which distance is that from an object to the camera image plane. For a selected "circle of confusion" the depthof-field will be read of from the intersections of the index curve with the distance scale. Fig. 3 shows a modification where in addition to stop scale 21A and two focal length scales 20A, 20B there is a T-stop scale 21B. On the latter scale each T-stop value has three close-spaced index lines of differing length. The longest corresponds to <SP>1</SP>/ 6  of a stop difference from the corresponding f value, the medium to <SP>1</SP>/ 3  of a stop difference and the shortest to ¢ of a stop difference. There are three "circle of confusion" index curves, 24, 24A, 24B with scale 30 showing their values. Distance scales 22A, 22B relate to fixed focal and zoom lenses respectively. The slide may have marked thereon further scales, e.g. 34 and 35 which denote foot-candles, frames per second, filter factors and filter density units. There may be associated with a scale 29 of T-stops so as to be able to read off the alterations in stop value required to compensate for given changes in illumination, camera speed, filter density and shutter angle respectively. Fig. 5 shows a further embodiment. Scale 43 is a distance scale and the index curves are viewed through slot 42. Alternatively the outer cylinder 41 may be transparent. Scales 46, 47 are the focal length and stop scales. In the embodiment of Fig. 1 the scale of focal lengths 20 may be marked on a strip slidably mounted on the base and provided with an index mark which co-operates with an adjacent fixed scale of different values of the "circle of confusion" marked on the base alongside the slidable strip. As a preliminary operation this sliding strip is first adjusted to the required "circle of confusion" before the adjustment of the slide 12 and disc 13.
Patent GB-1155265-A (GB)
Title: Skirting Board Assembly.
Inventor: DEUSS PETER RAYMOND
IPC: E04F19/04
Filed: 1965-06-21
Abstract: 1,155,265. Skirting board. P. R. DEUSS and A. G. RICHARDS. 15 June, 1966 [21 June, 1965], No. 26187/65. Heading E1B. A skirting board 18 is attached to a wall by one or more locating members 2 which permit vertical adjustment of the mounted skirting board, the skirting board being provided with flanges 20, 22 which engage in vertically open slots 10, 12 defined, respectively, between the member 2 and the wall, and at the base of the member 2. A support clip 28 attached to or integral with the members 2 may support cables or pipes within the skirting. The clips 28 may be also attached to or be integral with the skirting board, and may be of thermally conductive material for carrying heated pipes, the skirting board having air circulation slots formed along its length. Means for additionally locating the skirting board in predetermined vertical positions relative to the locating member may be provided.
Patent GB-694352-A (GB)
Title: Improvements in furnaces and like combustion appliances
Inventor: JOHNSON RONALD LESLIE
IPC: F23L1/00
Filed: 1948-10-07
Abstract: 694,352. Controlling combustion of solid fuel. C.U.R.A. PATENTS, Ltd. Jan. 3, 1950 [Oct. 7, 1948], No. 26189/49. Class 51(i) In a combustion appliance of the type wherein air under pressure is directed as a jet on to the free surface of a bed of fuel and combustion gases emerge from said free surface such as is disclosed, for instance, in Specification 579,324, the arched refractory roof 14 has shaped bricks 24 and 25 defining an air inlet slit 18 from which air supplied through an equalizing chamber 19 by a fan 21 is discharged at an angle of about 45 degrees to the vertical on to the surface 17 of the fuel bed. The size of the air slit may be corrected by the insertion of shaped obstructing elements 36. When it is desired to provide control of the heat release and of the composition of combustion gases as in the aforementioned Specification an adjustable control member is provided in the air supply slit in the form of a refractory tongue 45, Fig. 5, secured to a spindle 48 mounted with an externally screw-threaded sleeve 49 provided with an operating handle 50 and engaged with a bush 51 fixed to the top of a housing 52. When the air supply is cut off, the tongue 45 is retracted by disengaging the sleeve 49 from the bush 51, raising the spindle 48 until a hole 53 lies just above said bush 51 and inserting therein a retaining pin. Specifications 587,823 and 694,351 also are referred to.
Patent GB-380598-A (GB)
Title: Clutch plates
IPC: F16D13/64
Filed: 1931-09-18
Abstract: 380,598. Friction clutches. BORG & BECK CO., 6558, South Menard Avenue, .Chicago, U.S.A. Sept. 18, 1931, No. 26192. Convention date, July 20. [Class 80 (ii).] The friction facings 16 of a clutch plate 9, more particularly for a motor vehicle single plate clutch, are yieldingly supported by segments 10 of the plate, bent transversely alter. nately in opposite directions into the form of part frusta of a conical shell, their outer side edges being offset further from the disc than their inner ones. The segments are formed by radial slots 11 extending to the periphery of the disc or into straight or arcuate slots 22, Fig. 6, their inner ends opening into straight or arcuate slots 12. The friction faces 16 are secured to alternate segments by one or two rivets 17 passing through tongues 14 formed by V-shaped slots 15, which may be widened to render the sector more flexible. The securing action slightly bends up the tongues, flattens the sectors, and bends them bodily at the narrow necks 10'. The extent of the bend at the neck is directly proportional to the inclination of the side edges 13 of the sectors, which can be so arranged that the facings are parallel both when disengaged and under pressure. In the form shown in Fig. 7, the outer periphery of the sectors is bent to a shorter radius than is required for the previously mentioned condition, so that the friction faces are initially relatively inclined and their outer peripheries make first contact with the driving- member, so as to give a gradual increase of contact radially as the engaging pressure increases.
Patent GB-463314-A (GB)
Title: Improvements in refractory bodies and materials and process for making same
IPC: C04B35/18
Filed: 1935-09-21
Abstract: Refractory bodies particularly for use in the construction of glass tanks and consisting essentially of crystals of mullite in a glassy matrix are made by adding a not readily soluble fluorine-containing substance to a mixture consisting substantially of alumina and silica and/or compounds thereof, a portion of these being in plastic form, and firing a body formed of the mixture at 1500-1770 DEG  C.; the alumina-silica ratio in the mixture having a value, depending on the nature and quantity of the fluorine-containing substance and the firing temperature, approximating to that at which with increasing ratio corundum crystals first appear.  In general increasing the firing temperature and lowering the quantity of fluorine-containing substance tend to prevent formation of corundum. Fluorine-containing substances specified are fluorspar, lepidolite, fluoride opal glass, cryolite, sodium silicofluoride and magnesium, aluminium, zinc and lead fluorides.  Numerous examples are given in the Specification. In one example, a body consisting entirely of mullite is obtained by firing at 1720 DEG  C. a mixture in which the alumina-silica ratio is 2.5 and containing 5 per cent fluorspar, in another a body containing 80 per cent mullite is obtained by firing at 1600-1720 DEG  C. a mixture in which the alumina-silica ratio is 1.6 and containing 20 per cent fluoride opal glass.  The bodies may be made by first preparing a grog from the mixture according to the invention and then making the body from the grog bound with the same raw materials. Specification 463,321 is referred to.  The Provisional Specification refers to the addition of titanium oxide to the mixture from which the bodies are made.
Patent GB-645648-A (GB)
Title: A new or improved device for the measurement of humidity
Inventor: GARDINER ALAN ERNEST
IPC: G01N27/22
Filed: 1948-10-08
Abstract: 645,648. Electric indicating systems. SHORT & MASON, Ltd. Oct. 8, 1948, No. 26279. [Class 40 (i)] A humidity sensitive resistor or dielectric comprises a mixture of clay, kaolin and kieselguhr to which oxides of iron, nickel or chromium or a mixture thereof are added, proportions being given in the Specification. The mixture is fired at a bright red heat to produce a porous ceramic. Preferably the humidity sensitive elements are formed in sheets 4 and a plurality of such sheets are secured in the staggered relationship shown in Fig. 2 by means of conducting clips 8, Fig. 1, between end plates 1, 2 secured on an insulating spindle 11. The sheets 4 are parallel connected to a bayonet-type plug 3. The variation in resistance or dielectro strength may be measured in any manner. For example, the resistance variation may vary the voltage applied to the grid of a thermionic valve, Fig. 3 (not shown), the anode current of which indicates the humidity, or current variations produced by the resistance variations may be measured by means of a magnetic amplifier.
Patent GB-1476120-A (GB)
Title: Electric stepping motor
IPC: H02K37/08
Filed: 1975-06-20
Abstract: 1476120 Electric motors FACIT AB 20 June 1975 [8 July 1974] 26344/75 Heading H2A In an electric stepping motor having at least three stator/rotor pairs, the stators or the rotors being angularly displaced relative to one another, and in which the teeth of each rotor interact with a respective stator having equally circumferentially spaced apart poles, the number of rotor teeth being equal to the number of stator poles, the stator poles and/or rotor teeth are shaped so that as a rotor tooth moves in over a stator pole there is a steady increase in the length of overlap of the pole and tooth in the direction perpendicular to both the direction of flux flow between the pole and tooth and the direction of relative movement of the pole and tooth. Fig. 3 shows an axial air gap stepping motor in which the rotor teeth 32 are bevelled at 33, 34 to vary the radial overlap with stator poles 22. Fig. 4 illustrates an axial air gap motor having three stators which interact with three rotors 24, 25, 26 which are angularly staggered by 1/3 of the rotor tooth pitch. Fig. 1 (not shown) illustrates a cylindrical air gap motor in which the rotor teeth (13) are shaped to vary the axial overlap with the stator poles (11).
Patent GB-600640-A (GB)
Title: Process for the manufacture of 5:4-disubstituted diphenylamine carboxylic acids
Filed: 1945-10-10
Abstract: 5 : 41 - disubstituted - diphenylamine - 2 - carboxylic acids of the general formula: <FORM:0600640/IV(b)/1> in which R1 is a nitro group, an acylamino group or a mono- or di-alkyl-amino group and R1 is an amino group, an acylamino group or a substituted amino group are obtained by heating a 2-halogeno-benzoic acid containing the group R1 in the para-position to the carboxylic group or an alkali metal salt thereof, e.g. 4 - nitro - 2 - chlor and 4 - nitro - 2 - bromo benzoic acids, 4-acetylamino-2-chloro and 4 - diethylamino - 2 - chloro - benzoic acid, in an inert organic diluent in which said acid or salt is at least slightly soluble, e.g. a normally liquid alkanol or cycloalkanol having four to seven carbon atoms in the molecule, with an aniline containing the group R2 in the para position, e.g. p-phenylene diamine, a mono-acylated paraphenylene diamine or one in which the group in the para position has the general formula -NR5R6 in which R5 is hydrogen, an alkyl or an acyl group and R6 in an alkyl or an acyl group, at a temperature, e.g. 75-120 DEG  C. below that at which substantial dehalogenation of the 2-halogeno benzoic acid occurs in the presence of an acid accepter, e.g. an alkali metal carbonate and a source of copper.  In examples: (1) potassium 2-chloro-4-nitrobenzoate, potassium carbonate, copper powder and p-aminodimethyl aniline in amyl alcohol are heated at 120 DEG  C. to produce 41-dimethyl-amino-5-nitrodiphenylamine-2-carboxylic acid; (2) 4-acetamido-2-chloro-benzoic acid, p-phenylene diamine, potassium carbonate, copper powder and amyl alcohol are heated at 110 DEG  C. to produce p  5-acetamido-41-amino-diphenylamine-2-carboxylic acid; (3) 4-acetamido-2-chlorobenzine acid, p-acetamido aniline, potassium carbonate, copper powder and amyl alcohol are heated at 145-150 DEG C. to give a product identical with that of (2); (4) 2-chloro-4-nitro-benzoic acid, potasium carbonate, p-phenylene diamine, copper and amyl alcohol are heated at 75-100 DEG  C. to produce 41-amino-5-nitro diphenylamine-2-carboxylic acid.
Patent GB-1416887-A (GB)
Title: Coating of razor blade cutting edges gas flow regulation
IPC: C23C16/06
Filed: 1972-06-07
Abstract: 1416887 Coated razor blades GILLETTE INDUSTRIES Ltd 17 May 1973 [7 June 1972] 26491/72 Heading C1A [Also in Divisions B4 and C7] Razor blades are coated with, e.g. W, Mo, Cr, Pt, Ti and V or oxides, carbides, borides and nitrides thereof by decomposition of a vaporized compound in an inert or reactive gas. The blades are heated by, e.g. induction, resistance, electron beam, radiation, using a laser or infra-red, a heated contact element or passing a current through the blades. The deposition may take place in a glow discharge. A further coating of P.T.F.E. may be applied. In a specific example a coating of alumina is formed using aluminium butoxide.
Patent GB-508825-A (GB)
Title: Improvements in or relating to electric discharge devices
IPC: H01J5/12
Filed: 1938-09-10
Abstract: 508,825. Spring supports. CROMPTON PARKINSON, Ltd., and THORNDYCRAFT, H. W. Sept. 10, 1938, No. 26507. [Class 108 (iii)] [Also in Group XL] Double cantilever springs, pivoted with respect to one another, support an electric discharge device within a container. In the forms shown, Figs. 1, 2 and 5, the discharge tube 1 is spaced from the outer container 2. In Figs. 1 and 2, the springs 3 and 4 are wire loops which as seen in plan view are of substantially crescent form, pivotal about the points of the crescents. The inner parts of the crescents engage the discharge tube 1 and the outer parts exert a radial pressure on the inner surface of the container 2. The wire loop 5 may be replaced by an interlock between the springs themselves. In Fig. 5, the springs 9 and 10 are bent so as to abut against the projections 8 on the inner tube. One or both parts of the springs may be polygonal in shape, making contact with the tubes at a number of points only. If there are 3 or more such springs, adjacent springs have a common fulcrum. In Fig. 14, the springs 18, 19, 20 are polygonal. The springs are stressed, while or after the discharge tube is inserted, by moving the outer portions towards one another, and their strength may be controlled by the material, size or degree of temper of the wire employed.
Patent GB-1149762-A (GB)
Title: Improvements in or relating to methods and apparatus for decorticating plant products
IPC: A23N5/01
Filed: 1965-06-23
Abstract: 1,149,762. Decorticating nuts, grain &c. NATIONAL RESEARCH DEVELOPMENT CORP. 22 June, 1966 [23 June, 1965; 1 Nov., 1965; 13 June, 1966], Nos. 26564/65, 46090/65 and 26293/66. Heading A2Q. In a method and apparatus for decorticating or shelling plant products such as grain and nuts, particularly ground-nuts, the products are passed between two substantially flat parallel, vertical faces, one face being stationary whilst the other face moves in its own plane relative to the stationary face, at least one of the said faces being provided with grating or grinding surfaces, and the distance between said faces being adjustable. The grating or grinding surfaces may comprise one or more than one strip of grating or grinding material, located with its longer dimension substantially transverse to the direction of relative movement. One of said faces may be covered with resilient material, e.g. in the form of one or more than one removably mounted strip located with its longer dimension substantially transverse to the direction of relative movement. The apparatus according to Fig. 2 comprises a substantially vertical shoot 7 having a rear wall 4, on which is detachably mounted a sheet of resilient plastics material 15 constituting a stationary shelling member, and a front wall 3 pierced by a hole 8, in which is accommodated a disc 9 rotatably mounted on the front end of a shaft 10, whose rear, screw-threaded end passes through a hole in the wall 4, then engagingly through a screw-threaded bore in a boss 11 on said wall and a locknut 13, and terminates in a finger-piece 12, which can be turned to vary the distance between the disc 9 and the wall 4. One or more than one replaceable shelling member comprising at least one radial strip 19 of grating or grinding material is detachably mounted on the side of the disc facing the wall 4. A handle 26 is provided, so that the disc can be rotated by hand. Alternatively, the disc may be rotated by an electric motor acting through belt or chain transmission. According to Figs. 7 and 8 (not shown) the apparatus may comprise an endless, vertical conveyer (64) one vertically moving flight of which constitutes a moving face. According to Fig. 9 (not shown) the moving face may be part of the abrasive periphery of a horizontal, rotating roller (77) having a large diameter.
Patent GB-452541-A (GB)
Title: Improvements in or relating to electric discharge tubes
IPC: H01J21/12
Filed: 1935-09-25
Abstract: 452,541. Thermionic valves. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, Emmasingel, Eindhoven, Holland. Sept. 25, 1935, No. 26569. Convention date, Dec. 12, 1934. [Class 39 (i)] A valve comprising a variable-mu control grid has a suppressor grid with windings arranged similarly to those of the control grid, a uniformly wound screen grid being interposed between the control and suppressor grids. If the supports of grids near the cathode cause deviation in the electron flow, subsequent supports may be arranged to compensate for the variation.
Patent GB-407943-A (GB)
Title: Improvements in metal clad plates
IPC: B23K20/04
Filed: 1932-09-24
Abstract: 407,943. Making compound plates. WOLCOTT, D. S., Colonial Village, Pennsylvania, U.S.A. Sept. 24, 1932, No. 26607. Convention date, Sept. 24, 1931. [Classes 83 (ii) and 83 (iv).] Two or more steel &c., slabs 10 with thinner plates of nickel &c., 20 are assembled with a layer 20<a> of inert material (magnesium oxide) between, and welded round the edges, the pile then being heated to welding temperature and rolled down to thickness as required when the compound slabs of metal and nickel can be detached as at 20<a> for further use. The edges of the different metals may be chamfered away to receive strips of nickel 20b welded thereto, and a broader strip of metal 30 is welded thereto. Chrome nickel plates may be used for attaching to the steel slabs. The welding strips have gaps at the ends to allow air to escape from the plate joints on heating. The plates are first pickled and may be smoothed by planing &c. Specification 407,942 is referred to.
Patent GB-797932-A (GB)
Title: Improvements in electrical indicator instruments
IPC: G01R5/14
Filed: 1956-08-31
Abstract: 797,932. Electrical measuring instruments. GENERAL MOTORS CORPORATION. Aug. 31, 1956 [Sept. 13, 1955], No. 26652/56. Class 37. [Also in Group XXXVIII] An instrument, particularly for use as a liquid level or temperature indicator, including a thin flat armature pivoted in a plane normal to the axes of the coils is calibrated by bending tongues integral with ductile polepieces relative to the armature. As shown, a brass or aluminium frame 10 has flanges 12, 92 between which the armature 96 is pivoted and a back wall 64 to which is attached a field piece 40 and two cores 60, 62 carrying windings 52, 54. An insulating back-plate 22 carries terminals 24, 26, an earthing plate 30 and a conducting plate 46 in contact with the terminal 26. The field piece 40 is secured to the back-plate 22 by a rivet 36 passing clear of a hole in the plate 30. The ends of the cores 60, 62 are burred over to retain the pole pieces 80, 82 in appropriately the same plane as the armature 96 ; the integral tongues of the polepieces having arcuate ends concentric with the armature. A third pole 100 is provided by an integral extension of the field piece 40 having a front edge adjacent the armature 96 and inclined to the plane of rotation. In a modification, Fig. 6, not shown, the field piece 40 has two such front edges which insect adjacent the armature 96. All the magnetic components including the armature are made of iron or other ductile, high permeability, low hysteresis material. A pointer 20 attached to the spindle 94 passes through an arcuate slot in an aluminium dial attached to the flange 12. A counterweight 98 of brass or other material is attached to the spindle 94 so that the pointer is biased towards the left-hand edge of the scale when the instrument is not energized. In a modification, Fig. 8, the polepieces have a portion of reduced thickness such as at 124. Both coils are connected in series across a battery so that the poles at 80, 82 have like polarity. The ratio of the currents and hence the direction of the. resultant field with which the armature 96 aligns is varied by a resistive transducer in parallel with the coil 54. Compensation for the temperature co-efficient of the coils is provided by a shunt 44 across the magnetic circuit of coil 54.
Patent GB-887630-A (GB)
Title: A windshield wiper blade assembly
IPC: B60S1/38
Filed: 1960-08-02
Abstract: 887,630. Windscreen wipers. ANDERSON, J. W. Aug. 2, 1960 [Aug. 31,1959], No. 26700/60. Class 138 (1). In a windscreen wiper blade assembly for cleaning a curved windscreen a leaf spring 57 secured to one end of the primary yoke 25 enters through a slot 56 in a secondary yoke 24, connected to the outer end of the wiper blade 21, to apply pressure to the rear of the blade at a point between the ends of the yoke 24. The pressure applied by the spring 57 prevents the blade portion connected to the yoke 24 from flexing away from the less sharply curved and flat portions of the windscreen, and the pressure is reduced when the angle A between the yokes 24, 25 decreases as the blade portion passes over the more sharply curved windscreen portion. In a modification the leaf spring carries pressure pads which bear against a resilient strip reinforcing the wiper blade, and in a further modification the leaf spring is connected by claws to such reinforcing strip.
Patent GB-389860-A (GB)
Title: Improvements relating to moth-proofing
Filed: 1931-09-25
Abstract: A moth-killing composition consists of a powder containing 3-5 per cent each of chlorhydroxy-dimethylbenzene (Chlorax) and trinitro-dimethyl-isobutyl-benzene (Musk Xylol) with 94-90 per cent of an inert filler, e.g. magnesium carbonate.