baber/WOPTO huggingface dataset:
Patent GB-931379-A (GB)
Title: Production of coatings, films and shaped objects of polyvinyl alcohol
IPC: D21H19/12
Filed: 1961-06-05
Abstract: Self-supporting polyvinyl alcohol films are produced by applying to a casting surface a layer of an aqueous dispersion of polyvinyl alcohol of saponification number below 20 and consisting to the extent of at least 80% of its weight of particles smaller than 40 microns, gelling the layer by heating it in a moist atmosphere and drying it.  The dispersion preferably contains at least 70% of its weight of particles smaller than 20 microns.  The viscosity at 20 DEG C. of an aqueous solution of the polyvinyl alcohol of 4% concentration is preferably 10 to 40 centipoises.  The p  dispersions may contain plasticizers such as glycerine (up to 150% by weight of the polymer), ethylene glycol, or dior polyethylene glycols.  The concentration of polyvinyl alcohol in the dispersion may be 5 to 20% by weight.  In an example, a paper sheet pre-treated with a silicone is coated by means of a squeegee applicator with a dispersion prepared by malaxating 50 parts of polyvinyl alcohol (having a saponification number of 10, a mean particle size of 20 to 25 microns and a viscosity, in 4% aqueous solution at 20 DEG C., of 30 cp.), 225 to 250 parts of water and 75-50 parts (depending upon the flexibility desired) of glycerine, and diluting the dispersion at the time of use with 25-30% of water. The coating is gelled by placing the coated paper sheet for 5 to 10 minutes in a moisture-saturated atmosphere at 100 DEG C., and dried by heating in an oven at 100 DEG C. for one hour and the resulting polyvinyl alcohol film is stripped from the paper sheet.
Patent GB-1055728-A (GB)
Title: Pulse amplitude to pulse width modulation signal converter
Inventor: CRAVEN GEORGE FREDERICK
IPC: H03K3/33
Filed: 1964-05-15
Abstract: 1,055,728. Pulse modulation circuits; semiconductor pulse lengthening circuits. STANDARD TELEPHONES & CABLES Ltd. May 14, 1965 [May 15, 1964], No. 20313/64. Headings H3T and H4L. In a pulse amplitude modulation to pulse width modulation converter, the amplitude modulated pulses are supplied via terminals 6 of a coaxial line and capacitor 7 to a series connection of a step recovery diode 3, and a resistor 4 whose value matches the characteristic impedance of the line. A reverse bias - v volts is supplied via isolating inductance 5 and the width modulated pulses are taken across resistor 4 via terminals 8. In response to an amplitude modulated pulse of voltage V, Fig. 2 (not shown) forward current flows through diode 3 of magnitude determined by the nett forward voltage and the resistor 4. On the termination of the applied pulse reverse current flows for a time t2 which is linearly related to the amplitude of the forward current through the diode. Forward current will be linearly related to the signal voltage except at low values. due to the diode characteristic, so that the sampling reference level must be correspondingly adjusted.
Patent GB-301717-A (GB)
Title: Tubular solder with filling of soldering means
IPC: B23K35/14
Filed: 1928-07-12
Abstract: 301,717. Egholdt, (nÚe Bjerrum), E. May 29, 1928, [Convention date]. Soldering.-A solder stick consists of a tube of solder metal filled with a flux and deoxidizing means mixed with a substance which burns with only a small residue and which renders the filling viscous so that it does not issue in excess from the tube during soldering. The viscosity producing substance may consist of gum tragacanth. The tube may be of a diameter less than 8 mms. The flux may consist of glycerine together with ammonium chloride or other salts.
Patent GB-478958-A (GB)
Title: A throat pack with airway, for use during oral and other operations
IPC: A61M16/04
Filed: 1936-07-23
Abstract: 478,958. Throat guards. BARON, E., and LUBNER, B. July 23, 1936. No. 20376. [Class 81 (ii)] A throat guard for protecting the entrances to the air and food passages while allowing passage of air or administration of an�sthetics comprises a tube a of rubber or other flexible material and a member b forming a flange approximately at right-angles thereto which is shaped to fit the inside of the mouth. A pad c of the same shape may be slipped over the tube and held against the flange by bands. It may be of compressed cottonwool covered with gauze. The member b may be detachable. The tube a may be connected to any instrument for administering an�sthetics or gas such as air.
Patent GB-983141-A (GB)
Title: Improvements in or relating to fuel control in internal-combustion turbine engines
Inventor: TURNER HORACE GEORGE
IPC: F02C9/32
Filed: 1960-06-10
Abstract: 983,141. Gas turbine plant. PLESSEY CC. Ltd. June 8, 1961 [June 10, 1960], No. 20426/60. Heading F1G. [Also in Division G3] A fuel supply system for a gas turbine engine comprises a pump 10 delivering fuel through a throttle formed by ports 18 and spool valve 16 to the burners 20, a spill valve 23 maintaining the pressure drop across the throttle constant. The spool valve 16 is connected to a diaphragm 26 which divides the housing into two chambers 24, 25, the diaphragm being loaded by a spring 27 towards the chamber 24. The chamber 24 is fed with the engine compressor outlet pressure past a throttle 30 while the chamber 25 is open to atmosphere. The diaphragm 26 carries a valve seat for a spring loaded vent valve closure 31 which is provided with a head 34 co-operating with a manually adjustable sleeve 33 to control the extent of movement of the valve closure under the action of its loading spring. In operation, as the engine starts and its speed increases the pressure in the chamber 24 increases thus moving the spool valve 16 to increase fuel flow to the burners, the vent valve 31, remaining closed. At the predetermined engine speed, selected by the position of sleeve 33, movement of the valve closure 31 is arrested and any increase in pressure in the chamber 24 causes movement of the diaphragm 26 to open the vent valve to allow escape from chamber 24 to chamber 25 and atmosphere thus preventing movement of the spool valve. The sleeve 17 of the throttle valve rotates at engine speed and carries a governor 38 which maintains the predetermined engine speed constant by movement of this sleeve to control the throttle.
Patent GB-913355-A (GB)
Title: Improvements in or relating to composite roofings
Inventor: VANNAN EBENEZER
IPC: E04D7/00
Filed: 1960-06-10
Abstract: 913,355. Roofing. MANDOVAL Ltd., and AMALGAMATED ASPHALTE CO'S. Ltd. June 6, 1961 [June 10, 1960], No. 20553/60. Class 20 (4). A roof is covered with a screed comprising a mixture of bitumen and a lightweight material such as exfoliated vermiculite, foamed slag, pumice stone, sintered fly ash, expanded shale &c., this screed being covered with a layer of mastic asphalt without the use of an isolating membrane. If necessary, before application of the mastic asphalt, the screed may be sealed with a film of bitumen or rock asphalt, or alternatively a first coat of mastic asphalt may be employed to seal the screed prior to the application of one or more further layers of mastic asphalt. The screed may also include as a filler, powdered rock asphalt, Bentonite, Portland cement, Kaolin, limestone, fly ash or fibrous material such as asbestos. Lightcoloured chippings may be embedded in the surface of the mastic asphalt.
Patent GB-571516-A (GB)
Title: Improvements in electrical interrupters or vibrators
IPC: H01H50/14
Filed: 1943-12-10
Abstract: 571,516. Two-part couplings. BRITISH N.S.F. CO., Ltd. (Oak Manufacturing Co.). Dec. 10, 1943, No. 20693. [Class 38 (i)] [Also in Group XXXVII] The ceramic closure disc 1 of a vibrator or interrupter, which closes the open end of a casing 2 containing the interrupter and carries the connection pins 3 has ridges 4, 5 bordering or surrounding the roots of the pins thereby lengthening the surface leakage paths between the pins and the casing and between the pins themselves. Specifications 460,470 and 545,442, [both in Group XXXVII], are referred to.
Patent GB-204179-A (GB)
Title: Improvements relating to the dyeing of cellulose acetates
Filed: 1922-07-28
Abstract: In the production of azo dyes upon cellulose acetate silk, films, &c., the development is effected at temperatures of from 75 DEG  C. to boiling-point; the application of the bases may be effected at the same high temperatures or not; the bases and developers may be applied in separate baths or in a combined bath; the diazotization is effected in a separate bath at ordinary or low temperatures. Readily-hydrolizable salts of strong bases, such as sodium acetate, or free bases, such as caustic soda, may be added to the base baths, and acids or acid salts, for example, hydrochloric or acetic acid or acid sodium phosphate, may be added to the developing baths; protective colloids such as gelatine, boiled-off liquor, or sulphonated fatty acid soaps may also be added.  According to examples, acetate silk is dyed black by impregnating in a bath of dianisidine hydrochloride and sodium acetate at 75-95 DEG  C., diazotizing, and then developing in a bath of sodium b -oxynaphthoate, phenol or cresol, and acetic acid at 75-95 DEG  C.; using a similar base bath and developing in a bath of sodium b -oxynaphthoate, boiled-off liquor, and acid sodium phosphate, gives a navy-blue shade.  Soluble salts such as chlorides of magnesium, ammonium, zinc, or tin, may be added to any of the baths. Specifications 24284/07, 187,964, and 199,754 are referred to.
Patent GB-1199341-A (GB)
Title: An Improved Resonant Cavity Electron Discharge Tube
Inventor: OLTMAN HENRY GEORGE
IPC: H01J25/12
Filed: 1968-05-01
Abstract: 1,199,341. Velocity-modulated tubes. TRW Inc. 1 May, 1968 [11 July, 1967], No. 20728/68. Heading HID. The interaction between an electron stream and resonant cavity through which it passes is increased by operating a rectangular cavity in the TE 11  mode or a cylindrical cavity in the TM 01  mode, whereby for a suitable stream velocity, velocity-modulated electrons entering the cavity at the commencement of a cycle are accelerated or decelerated throughout a complete cycle. For the rectangular cavity of Fig. 2, the stream velocity is arranged such that electrons entering through grid 25 at the commencement of a cycle just reach the midpoint of the cavity as the electric field pattern passes through zero and the field lines reverse in sense. In the klystron of Fig. 1, cavity 15 is operated in normal klystron buncher fashion, with an interaction time of a half cycle or less, while the cavity 16 is excited by the bunched beam in the mode described above.
Patent GB-296190-A (GB)
Title: Improvements in the attachment of fastenings to attache cases, bags, purses and the like
IPC: E05B65/52
Filed: 1927-08-06
Abstract: 296,190. Cheney, C. W. Aug. 6, 1927. Hasp fastenings; stud fastenings. - A fastenings part is secured to the material of a bag, purse, or the like by prongs on a member mounted on a base plate which pass freely through holes in the base plate and are then clinched down, the base plate being without attachment prongs. For example, a circular stud, adapted to be engaged by a hole in a hasp, is formed with prongs which pass through a plate on which the stud is mounted and through the material of the, bag where they are clinched down. A housing for a hinged carrying handle is similarly mounted The Figure shows a hasp e hinged at e<2> in a spring containing box c which is formed with prongs c<4> extending through holes in the base plate a on which it is mounted; the box c may have additional ears c<5> whereby it is secured to the base plate a. The box c also has a housing c<2> for the end of a hinged carrying handle.
Patent GB-121606-A (GB)
Title: Machine for Filling into Receptacles Measured Quantities of Granular and Pulverulent Substances.
Inventor: FIECHTER LOUIS BENEDIKT
IPC: B65B1/36
Filed: 1918-12-13
Abstract: 121,606. Fiechter, L. B. Dec. 21, 1917, [Convention date]. Moving-chamber apparatus for granular materials; varying quantity measured in. -Apparatus for filling bags, tins, and the like with measured volumes of granular and like materials comprises one or more measuring- chambers a, b mounted on a driven shaft d so as to rotate below a supply hopper e fitted with stirrers o moving at a different speed from the chambers. The bottom f of the supply hopper is provided with an elongated curved slot g through which the material passes to the chambers in turn, the edge of the slot serving as a scraper for removing surplus material. The chambers are provided at the bottom with hinged discharge flaps i, which are normally held closed by an annular cam bar h, but drop open when over the discharge hopper k. To allow for variation of density of the material while maintaining full weight in the bag or tin, the shaft d may be adjusted vertically to move the chambers closer to or farther from the bottom of the supply hopper; or the chambers may be fitted with false bottoms adjustable by screws to vary their capacity. One chamber may be permanently of smaller capacity than the other. The parts may be enclosed in a casing r from which dust may be removed by a suction cleaning-device. The stirrer and the chambers may be driven independently to obtain different speeds.
Patent GB-503171-A (GB)
Title: Improvements in or relating to methods and apparatus for making spring assemblies orspring fillings
IPC: B21F33/02
Filed: 1938-07-14
Abstract: 503,171. Making metal fabrics. PLATTE, R., (trading as EPEDA-WERKE R. PLATTE). July 14, 1938, No. 20956. Convention date, Aug. 17, 1937. [Class 83 (iv)] Angular bending; shearing adjuncts.- Springs are connected to the frame of a wire mattress &c. by flat clips which are sheared and bent to U-shape at one station and are clamped over the parts at a second station. The wire 5 is fed intermittently by a pawl 26 moved by screws 20, 21 on a carriage 10 reciprocated by a toggle 14, 15. The carriage 10 carries a shear blade 7, a punch 8, and a clinching punch 9 co-operating with members on a base 11. On the downstroke of the carriage 10 the screw 20 moves the pawl over the wire. The blade 7 severs a length and the punch 8 bends the wire to U-shape with a central depression. The die 9 closes the clip over the frame positioned on a member 37. In order to lift the clip from the die co-operating with the punch 8, spring fingers on a carrier 41 slidable on a rod 42 frictionally secured to the carriage 10 by a spring 50 are moved upwards until a screw 45 stops the movement. A stop 60 on the carriage then swings a lover 51 to move the fingers to the left. On the downward stroke a screw 46 and a stop 59 control the movement of the fingers.
Patent GB-358575-A (GB)
Title: Improvements in or relating to tobacco-feeding machines
IPC: A24C5/39
Filed: 1930-06-11
Abstract: 358,575. Cigarette-making machines. EBCO MACHINE CORPORATION, 345, West 40th Street, New York, U.S.A.- (Assignees of Grupe, W. F. ; Lyndhurst, New Jersey, U.S.A.) July 11, 1930, No. 20981. Convention date, July 19, 1929. [Class 130.] The carding teeth of a carded roller are arranged in annular rows and a hopper base has its delivery end adjacent the carded roller and the space between the end of the hopper and the carded roller is closed by a back comb. The back comb has grooves corresponding in number to and spaced apart corresponding to the spacing of the rows of teeth on the carded roller and has the form of a filler-block of which a grooved portion extends into the bite between the hopper base and the carded roller. Tobacco is fed by a conveyer belt 11 to a carded roller 14 and a back comb 20 closes the gap between the belt and the roller. The comb, Figs. 5 and 6, comprises a body portion 21 with a face 22 curved to correspond with the surface of the roller 14, and this face 22 has tapered grooves 23 so disposed that the annular rows of teeth on the carding roller sweep through the grooves during movement of the roller. The grooves are wider at the end 23a where the teeth enter than at the end 23b where they leave. The comb has a convex face 24 close to the belt 11 and a flat top 25. The belt 11 and the carded roller may be disposed as described in Specification 327,434, [Class 130, Tobacco].
Patent GB-374319-A (GB)
Title: Improvements connected with pulp washers
IPC: C12C7/14
Filed: 1931-07-23
Abstract: <PICT:0374319/IV/1> A washer for pulp, particularly that used in brewing, comprises a tubular member 2 within which is a propeller 4, an outer vessel 1 for the pulp and baffles 6 disposed exterior of the tubular member to prevent a rotary motion of the pulp.  The washing liquid enters at 9 and passes off through the strainer 7.
Patent GB-630424-A (GB)
Title: Improvements in photographic assemblies
IPC: G03B35/24
Filed: 1945-08-17
Abstract: 630,424. Pictures. RELIEPHOGRAPHIE SOC. POUR L'EXPLOITATION DES PROCEDES DE PHOTOGRAPHIE EN RELIEF M. BONNET. Aug. 17, 1945, No. 21042. Convention date, Oct. 6, 1943. [Class 11] [Also in Group XX] In a photographic assembly which comprises a photographic image-layer on a rigid transparent support and provided at its rear surface with a reflecting sheet, formed on the surface thereof directed towards the image-layer with flutes of triangular or similar cross-section, the said reflecting sheet is held in close contact with the image-layer and forms a separate element which is angularly set by rotation and adjustably secured to said image-layer. As shown in Fig. 2, the image-layer 1 is carried by a transparent support 2 and has applied to its rear surface a fluted reflector 3, which may be a copper, sheet which has been nickel- or chromiumplated or a sheet of thermoplastic material, the fluted surface of which has been coated with metal by spraying or electrolytic deposition. In Fig. 8, the photographic assembly is shown as mounted in a suitable frame. A groove 29 of this frame accommodates a lenticular screen 30 carried by the transparent support 31 for a parallax panoramagram image-layer 32; while a reflector 34 is held with its fluted surface in contact with the image-layer by a panel 35 and spring stops 36 ; the illumination of the image by light reflected from the fluted surfaces is varied until it is most favourable by rotation of the reflector 34. The reflector may be rendered diffusing as by etching. Specification 615,629, [Group XXJ, is referred to.
Patent GB-1459308-A (GB)
Title: Chromium-containing disazo dyes their manufacutre and use flame retardant shaped materials
IPC: D06P3/04
Filed: 1974-05-13
Abstract: 1459308 Unsymmetrical chromium-containing disazo dyes CIBA-GEIGY AG 13 May 1974 [22 June 1973] 21071/74 Heading C4P Chromium complex dyes, in the form of their free acid, have the formula wherein one X is -SO 3 H and the other X is nitro, Y is -SO 3 H or -SO 2 R or -SO 2 NR 1 R 2 , in which R is an optional substitute C 1 -C 4  alkyl, a cycloalkyl or an aryl radical, R 1  is H or optional substitute C 1 -C 4  alkyl and R 2  is H, an optional substitute C 1 -C 4  alkyl, cycloalkyl or aryl radical, or R 1  and R 2  together with the N and optionally with the inclusion of a further hetero atom form a non-aromatic hetero ring with 5 or 6 members, and Z is an acyl group. The dyes may be used for dyeing and printing natural polyamides such as silk, wool, and in particular leather, and for synthetic polyamide fibres, e.g. those made from polyamides or polyurethanes, in grey shades.
Patent GB-296192-A (GB)
Title: Automatic vent and escape cap
IPC: B65D51/16
Filed: 1927-10-01
Abstract: 296,192. Watson, J. W. Oct. 1, 1927. Venting-apparatus. - Relates to combined vent and escape valves for barrels &c. According to the invention the vent valve E and the escape valve B are co-axial. Springs C and F normally retain the valves on their seatings. A dust cap H is provided above the valves.
Patent GB-1390958-A (GB)
Title: Rotor having removable blades
IPC: B22D29/00
Filed: 1972-05-05
Abstract: 1390958 Blasting BERGER MASCHINENFABRIKEN GmbH & CO 5 May 1972 [5 May 1971] 21195/72 Heading B3D [Also in Division B2] Striker plates are retained removably in grooves in single or opposed discs of mill rotors. In one arrangement, the plate 1 fits in grooves in discs 22 and is locked in by an element 3 located by a pin 6 fixed on the discs. The element bears on the plate by engaging a step 11 in the latter and by pressing against a spring 2 secured to the plate by adhesive. A similar device may locate a plate on a single disc 9, the groove 23 being of parallelogram section and permitting lateral removal of the plate. In another arrangement, Fig. 7 (not shown), an equivalent of the element 3 (37) has a ridge engaging in an axial groove in the pin (36) and instead of an arm 13 has the spring (19) secured to it and bearing on the plate with a curved end. A similar arrangement of pin, element and spring to that in Fig. 1, may engage between a radial edge of a plate and a single disc.
Patent GB-701970-A (GB)
Title: Improvements in and relating to steam generators with cooled combustion chambers
IPC: F23M5/08
Filed: 1950-08-28
Abstract: 701,970. Steam-generator furnaces. VORKAUF, H. Aug. 13, 1951 [Aug. 28, 1950], No. 21201/50. Class 51 (1) In a steam-generator furnace the combustion gases are divided into two streams, one of the streams being cooled separately and then combined with the rest of the combustion gases. As shown in Fig. 1 a steam generator is fired with pulverulent fuel from burners in roof apertures 1, secondary air being introduced at 10. Tube walls 5 and 7 respectively provide channels 8 and 9 at the front and rear of the combustion chamber, the greater part of the burning gases passing down the channels and being cooled before combining with the remainder of the gases flowing downwardly in the combustion chamber; baffles 13 are provided in the channels. As shown in Fig. 5 gases rising from the front portion of a chain grate 19 pass through a gas channel 24 where they are cooled and then mix' with the gases rising from the rear portion of the grate, secondary air being introduced at 21 and 23.
Patent GB-1413583-A (GB)
Title: Presensitised light-sensitive material
IPC: G03F7/021
Filed: 1973-05-04
Abstract: 1413583 Photo-resist materials; colour proofing OCE-VAN DER GRINTEN NV 4 May 1973 [5 May 1972] 21380/73 Heading G2C A photo-resist material comprises (a) a transparent polyester support which has been surface treated to improve its adhesive properties (b) a cellulose ester layer which is surface saponified and (c) a light-sensitive layer applied to the saponified surface comprising (i) polyvinyl alcohol with 78%- 90% hydroxyl groups and a viscosity of 30 to 60 c.p. (ii) a pigment and (iii) a water-soluble condensate of a diazonium salt and formaldehyde. The surface treatment of the support preferably comprises using a solution of trichloracetic acid in an organic solvent. The material may be image-wise exposed and developed with water to produce a coloured image or a lithographic plate and preferably pigments transparent to actinic light (e.g. blue pigments which do not absorb between 3500 and 4000Š. Alternatively, the material may be used for colour proof using differently coloured pigments and registering the developed materials after exposure to the appropriate colour separation negatives.