baber/WOPTO huggingface dataset:
Patent GB-693737-A (GB)
Title: Automatic regulator of high sensitivity for regulating a.c. voltages
IPC: G05F1/42
Filed: 1951-11-16
Abstract: 693,737. Automatic voltage control systems. STANDARD TELEPHONES & CABLES, Ltd. Nov. 16, 1951 [Nov. 21, 1950], No. 26939/51. Class 38 (iv). In an automatic voltage-regulating system for A.C. supply, the member sensitive to the output voltage charges comprises a glow discharge tube in series with the primary winding of a step-up transformer of high ratio, and the voltages appearing across the discharge tube and the transformer secondary are separately rectified and applied with opposed polarity to a voltage-regulating device such as a gridcontrolled valve with its plate current controlling a saturable reactor. In the embodiment shown, input voltage is applied at 1, 2 to the primary of an auto-transformer TR2, and output is taken to a load at the terminals 3<SP>111</SP>, 4<SP>111</SP>. The output voltage is taken from terminals 3, 4 to a potential-dividing auto-transformer TR1 which feeds a high-ratio step-up transformer TR3 connected in series with a multi-electrode discharge tube G1. The voltages across the secondary coil and the discharge tube are separately rectified at W1, W2 and the resulting D.C. voltages across the load resistors Rl, R2 are connected in opposition in the grid circuit of a valve VI. Voltage deviations at terminals 3, 4 cause corresponding changes in the grid bias of the valve V1 and the resulting changes in plate current vary the saturation of the core of a reactor Dr connected in series with the autotransformer TR2. The output voltage at terminals 3<SP>111</SP>, 4<SP>111</SP> is thus varied in a compensatory sense. Over-regulation may be provided by connecting the live side of the transformer TR1 to a point on the transformer TR2 between the terminals 1 and 3. Harmonics are shunted from the load by tuned circuits C3, L1 and C4, L2 ; and a current transformer TR4 in the load circuit feeds a rectifier bridge W3 to supply a D.C. control voltage across terminals 7, 8 which, when connected at points 7<SP>1</SP>, 8<SP>1</SP> in the grid circuit of the valve 1, opposes the effect of load fluctuations on the supply voltage. An alternating-current relay A, connected on the input side of the transformer TR3, normally holds open its contact a. Should the relay A be de-energized, owing for example to failure of the discharge tube G1, the contact a closes and applies prohibitive negative bias to the grid of valve VI, thus reducing the output voltage at 3, 4 to a minimum. The bias is supplied by a resistor R9 in the lead from the supply rectifier unit S to the cathode of the valve VI. Failure of the tube V1 also reduces the voltage at 3, 4 to a minimum.
Patent GB-663344-A (GB)
Title: Improvements relating to photographic cameras
IPC: G03B17/44
Filed: 1949-10-20
Abstract: 663,344. Photographic cameras with focusing screens. CONNELLY, D. A., and ALMA, W. Oct. 20, 1949 [Oct. 21, 1948], No. 26941/49. Class 98 (i) A photographic camera of the studio or field type has a focusing screen mounted to move angularly and towards and away from the camera back, resilient means maintaining the screen in normal position seated in the camera back, and manually actuated means acting against the resilient means to move the focusing screen to, and releasably retain it in, a position separated from the camera back to allow a dark slide to be freely inserted between the focusing- screen and the camera back. The screen may be mounted on an apertured frame detachably mounted on the camera back. As shown in Fig. 4, a frame 14 is clipped into a recess surrounding an aperture in a camera back 6, and is fixed to a second frame 15 with an aperture 16 defining the image field. Frame 14 is square, so that the longer dimension of aperture 16 may be horizontal or vertical. Strips 17, 18 and metal plates 21, 22 extend on each side of aperture 16 parallel to its longer sides. A ground glass screen 25 in a frame 23 fits over aperture 16 between plates 21, 22 and pins 29 (see also Fig. 3), carried by levers 32 extend through slots 27 in the plates at their mid-points extending perpendicularly to the camera back, and are journalled in bearings 28 on frame 23. The shorter ends of levers 32 bear on leaf springs 33 mounted in recesses of strips 17, 18, and the longer ends are joined by a handle 37. Bow springs 38, anchored to pins 41 and bearing on pins 42 carried by plates 21, 22 have eyes at their free ends encircling pins 29 to press frame 23 against frame 15. When the camera has been focused, the handle 37 is grasped to rock levers 32, the ends of which ride over springs 33 while pins 29 move along slots 27 to move frame 23 away from frame 15, until the ends of the levers meet stop pins 34. The levers are now over-centred and held in position by bow springs 38, so that a dark slide can be inserted between frames 23 and 15. On returning levers 32 to their original position, bow springs 38 press frame 23 against the dark slide to hold it in position for exposure. Leaf springs 23a mounted in recesses in frame 23 have bent ends pressing against plates 21, 22, so that when frame 23 moves away from the camera back, the frame is tilted for easier insertion of the dark slide.
Patent GB-693771-A (GB)
Title: Process for the preparation of basic aluminium salts of amino carboxylic acids
Filed: 1950-11-06
Abstract: Basic aluminium salts of alpha-amino-carboxylic acids are obtained by reacting pure and finely-divided aluminium hydroxide gel posessing swelling properties with at least one alpha-amino-carboxylic acid in the presence of water to form a paste of the desired basic aluminium salt and drying the paste. The aluminium hydroxide is preferably freshly precipitated or dried and preferably contains from 4 to 50 per cent Al2O3 and the gels may be prepared by precipitating a water-soluble aluminium salt with an aqueous solution of an alkali, e.g. ammonia, sodium hydroxide, or sodium carbonate at about room temperature and at a concentration such that the precipitated aluminium hydroxide will retain its swelling properties.  The precipitate is then washed with distilled water and if desired may be further treated, e.g. by centrifuging or pressing at below 40 DEG C., to remove part of the retained water. The preferred amino acids are aliphatic amino mono- or di-carboxylic acids, e.g. glycine, alanine, or glutamic acid, or a hydrolysate of proteins, e.g. of casein, zein, or h moglobin, prepared by enzymatic or chemical processes (either with acids or alkalis), or mixtures thereof may be used, e.g. a mixture of an aliphatic alpha amino acid and a hydrolysate of protein or a mixture of amino acetic acid and glutamic acid.  In examples: (1) aluminium sulphate octahydrate is dissolved in water and a diluted ammonia solution added to precipitate all the aluminium hydroxide.  The precipitate is filtered, washed with water sucked on a Buchner funnel, and then mixed with glycine, and the mixture stirred to yield a thin paste which is then dried at 60 DEG to 70 DEG  C. to yield dihydroxy aluminium aminoacetate.  Instead of aluminium sulphate there may be used aluminium chloride (AlCl3.6H2O) or the molecular equivalent of any other water-soluble aluminium salt; (2) a commercial aluminium hydroxide having swelling properties and containing 50 per cent Al2O3 is mixed with an aqueous solution of glycine. The reaction product is worked up as in (1) to yield the same product.  Instead of using glycine in the examples, alanine may be used or for each mol. of glycine a half mol. of glutamic acid may be substituted to obtain tetrahydroxy dialuminium glutamate.  By reacting the aluminium hydroxide with an aqueous solution of sodium acid glutamate dihydroxy aluminium sodium glutamate may be prepared whilst magnesium diglutamate yields a mixed glutamate, viz. tetrahydroxydialuminium magnesium diglutamate.  U.S.A. Specification 2,480,743 is referred to.
Patent GB-1284050-A (GB)
Title: Row of linking components for slide fastener and fastener unit formed from this row
IPC: A44B19/40
Filed: 1971-04-19
Abstract: 1284050 Fastener elements SOC FINAN CIERE FRANCAISE DE LICENCES ET BREVETS 19 April 1971 [13 April 1970] 27191/71 Heading E2S A row of fastener elements comprises a continuous spiral-shaped thread or filament 1 made preferably of synthetic resin having a varying pitch, each whorl of the spiral having two legs 2a and 2b substantially superimposed one above the other and characterized particularly by having a connecting portion 4 between whorls which has a notch 7 directed towards the opposite end of the whorl which contains the tooth 3. The notches are used to prevent slipping of the elements when they are stitched to the backing tape 5 by two lines of stitching A, B (Fig. 1) or double chain stitch (Fig. 3).
Patent GB-790146-A (GB)
Title: An improved method for the production of photographic contour maps
IPC: G03F1/88
Filed: 1955-09-23
Abstract: 790,146. Producing maps photographically; photograph enlargers. MAHAN, R. O., and TOWILL, R. M. Sept. 23, 1955, No. 27245/55. Classes 98(1) and 98(2) A contour map is produced photographically from a series of stereoscopic aerial photographs by making diapositives of the photographs, setting the diapositives up in a stereo-projector and plotting contours on a semi-transparent compilation sheet by known methods, forming a transparent positive of the compilation sheet and covering it with a mask, removing the mask from the positive between selected contour lines and projecting through the unmasked area on to a sensitive film a restituted image of that area from the corresponding diapositive, the image being enlarged to an amount depending on the mean contour height of the unmasked area, remasking the positive and repeating the unmasking and projecting steps for areas between all the selected contours in turn, developing the film and producing a map therefrom which will show the contour lines and a restituted photograph of the area corrected for the varying heights. The diapositives may be set up in a plotter and the contours plotted as described in U.S.A. Specification 2,492,870. The compilation sheet so produced is inked in, together with any names and other information required on the finished map and a high contrast negative produced from which the positive film is made. The positive film is masked all over with red masking tape, placed on a light table so that the contours are visible through the tape, and the tape is then cut along the selected contour lines with a sharp knife. The mask is removed between a pair of contour cuts and the partially masked film is placed over a light sensitive film on the table 10 of the restitutional enlarger shown in Fig. 1, and the corresponding diapositive 32 is placed on the projector 12 and illuminated from light box 29. The projector 12 may be adjusted by knobs 30 to have the same tilt as in the stereo plotter. The enlargement is adjusted dependant on the mean contour height to give a true scale of reproduction. The table 10 is vertically adjustable on the screwed rods 14 by rotating a hand wheel 21 and the films are held on the table by suction from a pump 36 and pipe 35. After exposure, the masked film is removed and the unmasked area blacked out; the next masking strip is then removed and the process repeated. The exposed film is then developed to give the final negative from which the map is made.
Patent GB-206503-A (GB)
Title: Improvements in or relating to liquid-level indicators
IPC: G01F23/14
Filed: 1923-10-31
Abstract: 206,503. Weymann, C. T. Nov. 2, 1922, [Convention date]. Addition to 195,078. Indicators actuated by pressure of head of liquid.-A modification of the invention described in the parent Specification consists in the provision of means whereby the displacements of the diaphragm are used to produce, when the indicator is operating, a pressure equal to that of the air space of the reservoir on the face of the distortable member of the pressure gauge usually open to the atmosphere, and, when not operating, equal pressures on both faces of the member. In addition to the water 7, the diaphragm 2 actuates a double valve 13, 13<1>, a spring 14 normally keeping the valve 13 open and the valve 13<1> closed; thus the chamber 12 communicates with both sides of the pressure gauge M through pipes 5, 15. Operation of the pump P closes the valve 13 and opens the valves 7, 13<1>. The size of the orifice 9 in the diaphragm is adjustable by a needle valve.
Patent GB-1045914-A (GB)
Title: Improvements in or relating to mountings for reeled strip material
Inventor: WAHL ADOLF
IPC: B65H16/04
Filed: 1963-07-10
Abstract: 1,045,914. Feeding webs. CROSS PAPERWARE Ltd. June 26, 1964 [July 10, 1963], No. 27352/63. Heading B6B. [Also in Division B8] A support for a web supply reel comprises a fixed post 11, Figs. 1 and 3, on which is freely rotatable a sleeve 12 axially adjustable on the post 11 by a knob 14. Mounted on the sleeve 12 is a collar 17 provided with pawls 34 cooperating with ratchet teeth 35 formed as circumferential grooves in the sleeve 12. Keyed to the sleeve is a part 27 of a collar 16 formed in two parts 27, 28 engaging each other along oblique surfaces 33, the part 27 supporting a lever 31 to engage in one of a plurality of slots 30 in the sleeve. The part 27 is also formed with a brake disc 29 clamped between brake pads 20 carried on arms 18, 19 pivoted on a bar 21, the pads 20 being urged together by an air clamp 25. In operation, the collar 16 is adjusted to the desired axial position on the sleeve 12 by engaging the lever 31 in a selected slot 30, the sleeve is adjusted axially by means of the knob 14, such axial movements causing the bar 21 to move axially on rollers 26, the collar 17 is removed by releasing the pawls 34, a web reel is inserted over the sleeve, and the collar 17 is replaced with the pawls engaging a selected ratchet tooth so that the collars are spaced apart the axial length of the reel core C. Adjustment of the nut 14 during operation provides for alignment of the reel. When the web is drawn from the reel, the resistance of the pads 20 produces a desired working tension in the web, the part 28 thus rotating relative to the part 27, whereby the part 28 moves to the right to hold the core firmly in position on the two collars.
Patent GB-616626-A (GB)
Title: Improvements in means for indicating and/or recording forces
IPC: G01L1/02
Filed: 1946-09-12
Abstract: 616,626. Measuring forces. HEENAN & FROUDE, Ltd., and WILESMITH, F. T. Sept. 12, 1946, No. 27382. [Class 106 (ii)] An apparatus for measuring a force acting in either of two opposite directions has a single capsule or the like containing a fluid and connected to an indicating and/or recording device, the force being applied to one end or the other of the capsule according to its direction. The capsule is formed by a body 1, Fig. 1, and a piston 1a and is slidable in a fixed housing 2. A downward force applied to a rod 4 is transmitted directly to the piston 1a which, when a member 7 in the body 1 abuts the housing 2, compresses a fluid contained in the space 16 between the piston and body 1 and connected to the indicating and/or recording device by a tube 16b. The rod 4 is connected to an adjustable pin 6 by bridge-pieces 9, 10 secured together by suspension rods, so that an upward force applied to the rod 4 is transmitted through the member 7 to the body 1 which compresses the fluid in the space 16, the piston 1a being held against movement by engaging the upper part of the housing 2. The capsule unit is counterbalanced by a weight 12 carried by a lever 13 which engages the under surface of the member 7. In a modification, Fig. 5, the capsule is formed by flexible diaphragms 18, 18a, each clamped to a fixed housing 2 by a cover 19 and to a central member 20. Pins 4 and 6, one or both of which may be adjustable, engage the central members 20 and are connected together and to the force-applying means by a forked lever 23, 24. When a force is applied in either. direction, one central member 20 is quickly held against movement by its cover 19 and the fluid, connected through a tube 21a to the indicating and/or recording device, is compressed. The forked lever 23, 24 may form the torque arm of a swinging-carcase dynamometer.
Patent GB-962318-A (GB)
Title: Process and device for manufacturing light construction plates
Inventor: WILKE KLAUS-DIETHER
IPC: B27N3/08
Filed: 1960-08-08
Abstract: <PICT:0962318/C3/1> <PICT:0962318/C3/2> A process for making thin, cellular construction plates comprises mixing loose fibrous material with magnesium sulphate solution, magnesium oxide and a foaming agent to a moist, crumbly mass, adding to said mass a foam stabilizer, foaming the mass and shaping it in a continuous working process to form thin plates which are dried at above 212 DEG F.  In a modification of the process the fibres are mixed with sorel cement and foam stabilizer to a ropy dough, foaming agent is added, and the mixture agitated to foam it.  Preferred fibrous material is cellulose.  Some organic synthetic fibres can be used.  The preferred foaming agent is a fatty alcohol sulphonate.  The foam stabilizer mentioned is a dispersion of urea-formaldehyde resin.  The plates may be coated with a primer, (which may be coloured) formed in the same way as the mass from which the plates are made.  Apparatus for making the plates comprises a centrifugal mixer 2, fed with fibres through hopper 3, magnesite through inlet 4, magnesium sulphate solution through inlet 5 and foaming agent through opening 6, and discharging the moist, crumbly material on to conveyer belt 7, feeding a stirrer cascade 8, provided with stirrers 8a.  The foam stabilizer is added to one of the pots (preferably the first) of the cascade, and the foamed mixture is conveyed, e.g. by conveyer 9 to the sieve moulding machine 10, comprising a sluice device 13, Fig. 2 with walls 14a, 14b, supporting endless wire screens 15, 16, which deliver foamed sheet material of desired width and thickness over lip 17 and traversing shoe 19 on to transporting frame 18.  An elastically resilient plate 21 smooths the sheets.  The sheets are cut, e.g. by a wire 22 and fed to a conveyer 23 in a drying kiln 24, where the plates are preferably heated from the underside.
Patent GB-1153538-A (GB)
Title: Improvements in or relating to Rigid, Fluid-Tight Housings for Enclosing Electrical Apparatus Operating in a Gaseous Medium Under Pressure
IPC: H01H33/56
Filed: 1967-06-14
Abstract: 1,153,538. Switch cases; transformers; capacitors. DELLE-ALSTHOM. 14 June, 1967 [15 June, 1966], No. 27520/67. Headings H1M, H1N and H1T. A rigid fluid-tight, gasfilled housing for a switch, circuit-breaker, transformer or capacitor, comprises two pressed sheet-metal shells 1 and 2 with reinforcing stays provided by the insulating supports 5 and 6 for the electrical apparatus 4 and the bushings 7, 8, and also 9, 10, 11, 12, Fig. 2 (not shown), and seals 15 and 16 are disposed outside the housing around the bushings and supports such that the internal gas pressure on the sheetmetal shells 1, 2 tends to tighten the seals in their seatings and increase the fluid-tightness of the housing when the gas pressure increases. The connection. 3 between the shells 1, 2 is by nuts and bolts 22, Fig. 3 (not shown), or clips 23, Fig. 4 (not shown). A polysulphide-based mastic 17 is employed at the connection 3 to ensure fluid-tightness.
Patent GB-228271-A (GB)
Title: Improvements in or relating to separators for electric storage batteries
IPC: H01M50/457
Filed: 1923-11-02
Abstract: 228,271. Fuller's United Electric Works, Ltd., and Topple, W. L. Nov. 2, 1923. Separators for storage batteries consist of one or more flat sheets or strips of porous material such as wood pulp enclosed in an envelope, or between two flat sheets, or perforated ebonite or hard rubber which may be provided with ribs to provide spaces for the circulation of the electrolyte.
Patent GB-1196641-A (GB)
Title: Improvements in or relating to Magnetic Work Holders
Inventor: DAVIES STANLEY GORDON
IPC: B25B11/00
Filed: 1967-06-15
Abstract: 1,196,641. Magnetic holding devices. S. G. DAVIES. 31 May, 1968 [15 June, 1967], No. 27590/67. Heading H1P. As shown a magnetic work-holder comprises a pair of polepieces A, B connected in spaced parallel relationship by adjustable clamping means 6, the lower faces of each polepiece having castellations which are offset relative to those of the other polepiece. The device is placed on the holding face of a known magnetic chuck having magnetic poles 1B of one polarity inset in a surface 1A of the opposite polarity so that the castellations of polepiece A contact surface 1A and those of polepiece B contact inset poles 1B. The polepieces are magnetized with opposite polarities so that a workpiece 8 laid across their upper edges is held in position. Recesses 9 may be provided in the upper edges of the polepieces to locate the workpiece.
Patent GB-440557-A (GB)
Title: Improvements in or relating to attaching devices
IPC: G03B27/46
Filed: 1935-10-07
Abstract: 440,557. Hand sewing-tools. DENNISON-VICTOR CO., Ltd., Minerva Road, Park Royal, London.-(Assignees of Flood, C. A. ; c/ o Dennison Manufacturing Co. ; Framingham, Massachusetts, U.S.A.) Oct. 7, 1935, No. 27624. Convention date, May 7. [Class 112] A tool 28 for passing through a piece of material a toggle B with a string attached comprises a needle 1 with a bore 3 to receive the toggle, a slot 5 for the string and a plunger 4 to push the toggle along the borewhen the needle has penetrated the material. The shank of the needle is held in a holder 6 by clamping screws. The holder has a recess 11 for insertion of the toggle into the needle, and a slot 12 for the string. The needle holder may be carried by a frame 21 sliding in a handle 28. The plunger 4 is operated by a push-piece 33. The string S of the toggle B may have a label T attached. Fig. 9.
Patent GB-320742-A (GB)
Title: Manufacture of solubilised vat dye and process of dyeing therewith
IPC: C09B57/00
Filed: 1928-09-26
Abstract: 320,742. British Dyestuffs Corporation, Ltd., and Hailwood, A. J. Sept. 26, 1928. Addition to 280,647. Dinaphthalimide.-The dyestuffs obtained by alkaline fusion of naphthalimide or an oxime of acenaphthenequinone under any conditions other than those prescribed in example 1 of Specification 26690/13 are obtained in a soluble of colloidally soluble form suitable for vatting by treating with oleum or a halogensulphonic acid and reprecipitating by dilution with water. In ex ample, the dyestuffs obtained by fusion of naphthalimide with caustic soda or with alcoholic caustic potash are heated with chlorsulphonic acid, poured into ice and water, and the products separated as pastes which are made slightly alkaline with caustic soda.
Patent GB-825314-A (GB)
Title: Improved cut-out warning means for use in association with automatic lathes and the like
IPC: B23B13/12
Filed: 1957-09-02
Abstract: 825,314. Lathe details. FORBES, B. J. May 15, 1958 [Sept. 2, 1957], No. 27668/57. Class 83 (3). A warning-device for automatic lathes and the like comprises a flexible-shaft 5 driven by one of the lathe-camshafts 4 and passing to a reduction-gear in a casing 20. The gearing is adapted to rotate a pointer 12, moving over a graduated dial, which operates a switch 14, thus closing the circuit to an audible warning-device 16 and/or a visible-device 17. The pointer may be set initially to a predetermined position in conjunction with a stop 19 which may also be adjusted around a circular guide slot 18. The device may be used to give warning of a stockbar in an automatic lathe being almost used up and requiring replacement.