baber/WOPTO huggingface dataset:
Patent GB-687365-A (GB)
Title: Improvements in shock wave compressors, especially for use in connection with continuous flow engines for aircraft
IPC: F04D21/00
Filed: 1950-06-01
Abstract: 687,365. Axial-flow and helico-centrifugal compressors. OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AERONAUTIQUES (O.N.E.R.A.) June 1, 1950 [June 2, 1949], No. 13760/50. Class 110(i) A compressor comprises at least one bladed element into which the gas enters at supersonic relative velocity, each of the passages between the blades being initially convergent and then divergent, a series of shock waves occurring in the convergent part, the last shock wave being normal to the direction of flow and located at or near the throat of the passage and the first shock wave being oblique and starting from a point of discontinuity in the curvature of the suction side wall of the passage and ending at or near the leading edge of the pressure side wall. Each rotor blade 2 is slotted at 2a, the rear portion having a sharper curvature than the front portion and having its leading edge partly covered by the trailing edge of the front portion. A discontinuity of curvature at a point b of each diffuser blade 1 sets up an oblique shock wave O 1  which ends at the leading edge a of the adjacent blade and is followed by one or more oblique shock waves O 2  and a normal shock wave Op. The flow is supersonic in the convergent part of the diffuser passage ending at the wave Op and subsonic in the subsequent divergent part. The rotor may be of helico-centrifugal form. The sets of blades 1 and 2 may be rotated in opposite directions, as by coupling to the wheels of a contra-rotating gas turbine. Stabilization of a shock wave at a discontinuity of the diffuser blade profile may be effected by sucking the boundary layer through a slot at the discontinuity, the slot being connected to a manifold in communication with a suction fan. Alternatively, the slot may extend through to the opposite side of the blade so that the difference of pressure between the two sides causes air to blow upon the boundary layer at the meeting point of at least two shock waves. In this case, the blade may be formed by two separate elements. Specification 687,338 is referred to.
Patent GB-774625-A (GB)
Title: Improvements in or relating to coating compositions
Inventor: SCHWEITZER FRANCIS EDWARD
IPC: D06M15/267
Filed: 1955-05-12
Abstract: A liquid coating composition, from which haze-resistant cured coatings may be obtained, comprises cellulose nitrate, a polymerizable methacrylic acid diester of a saturated aliphatic dihydric alcohol, a volatile organic solvent and not more than 1 per cent of water by weight, the cellulose nitrate and the diester being present in the relative proportions of 5-95 per cent and 95-5 per cent by weight respectively, but preferably in the relative proportions of 10-60 per cent and 90-40 per cent. Optional ingredients such as plasticizers, resins, e.g. oil-modified alkyd resins, polyester resins, polyvinyl acetals or acrylic resins, cellulose esters and ethers, pigments, e.g. silica, and dyes may also be present.  Suitable dihydric alcohols for the preparation of the diester are the polymethylene or polyethylene glycols or glycol mixtures with an average molecular weight of 62-400, preferably 90-200.  Suitable grades of cellulose nitrate are specified.  The solvents may be the lower aliphatic monohydric alcohols and their acetic acid esters, e.g. butyl acetate, hydrocarbons, e.g. toluene, and the lower aliphatic monoethers of ethylene glycols and their acetic acid esters; they should be ketone-free.  The non-volatile film-forming content of the composition may be 5-75 per cent, preferably 10-50 per cent. Polymerization catalysts such as cobalt or other metal salts, benzoyl peroxide, a ,a 1-azodiisobutyronitrile or tert.-butyl perbenzoate, may be incorporated in the composition, as may also polymerization inhibitors such as hydroquinone, to prevent gelation during storage.  The compositions of the invention are especially suitable for coating wood. Specifications 461,979, [Group IV], and 654,446 are referred to.
Patent GB-1433682-A (GB)
Title: Preparation of 2-benzimidazole-thiols
IPC: C07B61/00
Filed: 1974-03-28
Abstract: 1433682 Benzimidazolethiols E I DU PONT DE NEMOURS & CO 28 March 1974 [29 March 1973] 13839/74 Heading C2C A process for the preparation of a 2-benzimidazolethiol comprises reacting an ophenylenediamine and carbon disulphide in an organic solvent which dissolves said diamine, which has a boiling point of at least 65‹ C. and which is substantially inert to carbon disulphide under the conditions of reaction, in the presence of 0À25 to 5À0%, based on the weight of the diamine, of a quaternary ammonium hydroxide whose substituents are organic radicals which each have up to 30 carbon atoms. The phenylenediomine may have the formula where R<SP>1</SP>, R<SP>2</SP>, R<SP>3</SP> and R<SP>4</SP> are independently H, C 1-12  alkyl, C 1-12  alkoxy, halogen or NO 2 . The quaternary ammonium hydroxide may be of formula wherein (a) R<SP>1</SP>, R<SP>2</SP>, R<SP>3</SP>, and R<SP>4</SP> are independently selected from alkyl and alkenyl radicals having up to 20 carbon atoms; aralkyl and alkylsubstituted aralkyl radicals having from 7 to 30 carbon atoms; (b) R<SP>1</SP> and R<SP>2</SP> are selected from -(CH 2 CH 2 O) n H radicals, wherein n is 1 to 15; and R<SP>3</SP> and R<SP>4</SP> are selected as in (a) above; or (b) R<SP>1</SP> and R<SP>2</SP> together with the nitrogen form a saturated six-membered ring which can contain an ether oxygen in the 4-position, and R<SP>3</SP> and R<SP>4</SP> are selected as in (a) above. It may be prepared in situ from a quaternary ammonium salt and NaOH or KOH. Examples prepare products from a mixture of toluenediamine isomers.
Patent GB-890855-A (GB)
Title: Improvements in or relating to gear pumps and their use in the manufacture of wire strands
Inventor: HINDLE ERNEST ANDREW
IPC: F04C13/00
Filed: 1958-05-01
Abstract: 890,855. Gear pumps. GLOVER & CO. Ltd., W. T. May 1, 1959 [May 1, 1958], No. 13934/58. Class 110 (2). A gear pump for supplying a compound for filling the interstices between the wires of a wire strand is provided with a lateral discharge port 4 which is disposed adjacent the nip of the gear-wheels 1 and communicates by means of passages 5, 9 with a wire-receiving die 7 mounted within the pump housing. The temperature of the compound may be controlled by water circulated through chambers 12 in the pump housing. The die may be rotatably coupled to the pumping gears, see Fig. 5 (not shown).
Patent GB-219131-A (GB)
Title: Improvements in or relating to mechanism for controlling the action of railway wagon and other fall down doors and flaps
IPC: B61D7/26
Filed: 1923-05-26
Abstract: 219,131. Monarch Door Controller Co., Ltd., and Bowles, G. B. May 26, 1923. Operating and controlling doors by springs.- Fall-drum side doors or flaps of railway wagons with controlling springs c and connected link- and-lever mechanism of the kind described in Specification 11508/07 are provided with doorholding means adapted to secure the door or flap in both the fully open and fully closed positions by the engagement of a notched lever with a stationary pin or cross-shaft. In the arrangement shown in the Figure, a notched link k connected with the door member a is adapted to engage a cross-pin or shaft n<1> for this purpose. The link is pivotally connected at i with the lever mechanism associated with the door-closing spring, and it is guided between pins s, s' on a disc r connected with a hand-operated lever t. The notches m<1> engage with the pin n<1> and secure automatically the door in the open and closed positions. By a rotational movement of the lever t, the disc r is moved so that the pin s<1> lifts the link k and disengages its notch from the pin n<1>. Springs may be used to assist the automatic locking operation of the link k. In a modified construction, the link k is secured to an extension of the member f. Specification 6994/12 also is referred to.
Patent GB-693972-A (GB)
Title: Improvements in or relating to bags, envelopes and like containers and the attachment thereof to supporting and display means in a readily detachable manner
Inventor: RANDALL JOHN WILLIAM
IPC: B65D27/00
Filed: 1950-06-05
Abstract: 693,972. Paper and like bags; packaging. DICKINSON & CO., Ltd., J. May 31, 1951 [June 5, 1950], No. 13957/50. Classes 94(i) and 94(ii). A bag, envelope or like container with open mouth is formed with one or more outwardly extending flaps 5 with base weakened by a perforated, scored or other tear away line 4 so that the bag or the like can be torn from the flap without rupturing the side walls and the inner meeting surfaces of the mouth of the bag and one or more faces of the flap or flaps are formed of heat sealable material or provided with strips 13, 13a of heat sealable material to provide means for sealing the bag mouth and securing the bag flap or flaps to a support. The bag may be formed with the mouth end or base of the front wall and/or rear wall and/or one or both side edges extended to form single flaps or adjacent pairs of flaps with the base and side edges of the walls joined by adhesive seams inset from the edges. Alternatively the single flap at a bag mouth may be formed by cutting away one mouth edge of a bag or by forming the bag from a blank doubled over at the base into unequal lengths. The bags may be mounted in spaced or overlapping cascade relation on a supporting member or display stand by the heat sealing material of the flaps. The bags after filling may be heat sealed and the flaps secured together and to the mounting support in one and the same operation. Alternatively (Fig. 8) a plurality of bags before or after sealing the contents may have their flaps 5 united together by heat activated selfadherence to form a stiff supporting member 14 and this operation may simultaneously seal the bags along the strips of heat sealable material 13. The member 14 may be provided with an eyelet 15 and/or eye hooks 16. The bags may be of paper, fabric or regenerated cellulose or of a heat sealable material and of any shape, including tapered. The front wall only may be transparent.
Patent GB-1213163-A (GB)
Title: Centrifugal pumps
Inventor: RAWSON PETER JOHN
IPC: F04D7/06
Filed: 1967-03-28
Abstract: 1,213,163. Centrifugal pumps. ENGLISH ELECTRIC CO. Ltd. March 27, 1968 [March 28, 1967], No. 13978/67. Heading F1C. [Also in Division F4j A centrifugal pump for pumping molten metal from a furnace comprises a hollow impeller held with its lower end dipping into the metal 23 and spun by a motor 11 from its upper end, the impeller consisting of an upper portion comprising a tubular lining 17 of refractory material, an insulating layer 27 surrounding the lining, and a metal sheath 26 surrounding the insulating layer for strengthening the upper portion, and a lower portion consisting of a self-supporting tube 20 of refractory material. The separate tubes 17, 20 may be replaced by one continuous tube of refractory material. Radial vanes 24 may be provided to help start rotation of the metal entering the impeller. Centrifugal force on the column of molten metal within the impeller causes it to rise along the inner wall of the impeller until it is discharged through outlet ports 18 into an annular trough 29, from which it passes via a spout 30 into a channel 31. If the liquid level in the trough 29 rises above a weir 34, the excess liquid spills back in to the pool 23. Instead of or in addition to the weir 34, a float valve in the trough 29 may control the speed of the motor 11. The trough 29 and channel 31, at least at parts liable to be contacted by molten metal, are of refractory material. The motor 11 is driven by compressed air, the exhaust from the motor passing via openings 10A to cool the sheath 26. Where it is necessary to control the atmosphere in contact with the molten metal, the whole pump may be enclosed in a gas-tight vessel which is evacuated or filled with a desired atmosphere.
Patent GB-1402083-A (GB)
Title: Water-soluble alkyd resins
IPC: C08G63/685
Filed: 1973-03-22
Abstract: 1402083 Water soluble alkyd resins EASTMAN KODAK CO 22 March 1973 [22 March 1972 (2)] 13991/73 Heading C3R A curable water-soluble polyesteretheramide having an acid number of 5 to 100 is derived from (A) a polycarboxylic acid component having 4 to 20 carbon atoms and which is an aliphatic or aromatic acid or anhydride or a mixture thereof, (B) a polyol component which is (1) at least one aliphatic polyol having 3 to 15 carbon atoms and at least three hydroxyl groups, (2) at least one trioletheramide having the formula HOCH 2 CH 2 OCH 2 CON(CHRCHROH) 2  in which each R is hydrogen, methyl or ethyl or (3) a mixture of (1) and (2) and (c) a dioletheramide having the formula HOCH 2 CH 2 OCH 2 CONHY where (a) Y is -C(R<SP>1</SP>) 2 -C(R<SP>1</SP>) 2 -NHCOCH 2 OCH 2 CH 2 OH and R<SP>1</SP> is Me or Et (b) Y is -(CH 2 ) n -NHCO-CH 2 OCH 2 CH 2 OH and n is 1 to 6 or (c) Y is -CR 2 CR 2 OH where R is as hereinbefore defined or (d) a combination of (b) and (c) the ratio of the hydroxyl groups in the polyol component to the carboxyl groups in the polycarboxylic component being within the range of 1À0 : 1 to 1À6 :1, the components through an oxycarbonyl linkage forming integral recurring ester units of the polyestertheramide chain. Comparative examples describe the preparation of such materials from glycerol, trimethylol propane, pentaerythritol, trimethylolethane, dipentacrythritol, tripentaerythritol; N - (2 - hydroxyethyl) - 2- hydroxyethoxyacetamide, 1:1 - di - (2- hydroxyethoxyacetamido)methane, 1 : 2 - di- (hydroxyethoxyacetamido)ethane, 1 : 3 - di- (2 - hydroxyethoxyacetamido)propane, and 1 : 6 - di - (2 - hydroxyethoxyacetamidohexane) which may be condensed with diglycollic, maleic, succinic, glutaric, adipic, suberic, sebacic, phthalic, isophthalic, terephthalic and trimellitic acids.
Patent GB-598588-A (GB)
Title: Improvements in selenium rectifiers and methods of making the same
IPC: H01L21/06
Filed: 1944-07-21
Abstract: 598,588. Asymmetrically-conducting resistances. STANDARD TELEPHONES & CABLES, Ltd. July 21, 1944, No. 14011. Convention date, July 22, 1943. [Class 37] A metal plate or wire 10 is coated with selenium 12 covered by an insulating layer 14 having one or more apertures 16, and is housed in a metal tube 18, Fig. 1, into which counterelectrode alloy 20 is poured in a molten condition to contact the exposed spots of selenium and fuse with the tube. Better contact may be obtained by first placing a small amount of alloy on the insulation and openings before insertion into the tube 18. The insulation may be applied by dipping the plate 10 in varnish or other liquid insulant, and, by using a clamp which grips the selenium at two spots, opposite openings 16 can be formed. Alternatively, masking tape having preformed small holes therein may be used. A wire lead 22 may be inserted into the alloy before hardening and the end of the tube crimped to secure it, Fig. 4 (not shown). Two such units may be used in a full-wave bridge rectifier as shown in Fig. 5. Each metal tube 218 is made of a metal containing e.g. iron, to act as the baseplate of a second rectifier having similar coatings of selenium 250 and insulation 252 with openings 254. 256 is a metal container and 258 is counter-electrode alloy.
Patent GB-112910-A (GB)
Title: Improvements in or relating to Wire-stitching or Stapling Machines.
Inventor: WADE HAROLD
IPC: B27F7/21
Filed: 1917-09-28
Abstract: 112,910. Wade, H., (Boston Wire Stitcher Co.). Sept. 28, 1917. Stapling and discontinuous wire-stitching.-In a wire-stitching or stapling-machine in which the bender-bar and the staple-driving mechanism are operated by a differential-motion device of the type in which a member reciprocated by a crank co-operates with a second member also reciprocated by a crank which is disposed so as to cause relative reciprocating movement of the members, the driving-mechanism of one of the members has combined with it a yielding thrust member which is located between the operative part of the reciprocating-member and its operating crank. The staple-driver D<2> comprises a thin plate removably secured in the front face of a driver bar D<1> connected by a tongue and groove to a driving-bar D, which is in the form of a rectangular plate having splines d on its opposite sides to slide in grooves g in vertical guiderails G secured to the front of a bonnet B. The driver-bar reciprocates in a slot c<1> formed in the bender-bar C, which also is of plate-like construction having splines c fitting in the grooves g. The sides of the bar project downwards to form legs c<4> which bend the length of wire fed into a groove f<1> in an anvil F into staple form; the anvil is forced back by the driver D<2> as it descends to drive the staple. The usual form of staple-supporter H is provided to swing into position between the legs c<4> to hold the staple in place during the driving operation. The upper end of the driving-bar D is secured to a wrist-pin m on which the lower end of a connecting-rod L is pivoted, the other end of the rod being journaled on a crank-pin k<3> projecting from an eccentric hub K, which is pinned to the outer face of a disk J keyed to the end of a drive shaft S. The hub K is surrounded by a strap-like bearing n of one member N' of a telescopic pitman N, the other member O of which has its lower end screwed into a T-shaped bearing-member O<1> bored to receive a wrist pin P secured to the bender-bar C. A coiled spring R tends to maintain the pitman extended to its full length. The disk J rotates in the direction of the a.rrow 2, Fig. 2, and, owing to the arrangement of the crank-pin k<3> with respect to the axis of the hub K, the bender-bar C and driver are operated with a differential motion which causes the bar to descend first to form the staple and then to remain stationary, as permitted by the yield of the pitman N, while the driver continues its descent to drive the staple into the work and to clinch its legs. The work is thus held against accidental displacement while the staple is driven, and, further, the stitching mechanism is able to operate on different thicknesses of stock without any adjustment in. the length of its stroke. After the staple has been clinched, the driver and benderbar start to rise. together, but the driver is raised more quickly than the bender-bar so that it will slide relatively thereto and be out of the way when the bar starts its next descent.
Patent GB-1383793-A (GB)
Title: Template for cutter teeth indexing table
IPC: G01B5/20
Filed: 1972-03-24
Abstract: 1383793 Template and indexing plate for broach teeth DEFENCE SECRETARY OF STATE FOR 26 March 1973 [24 March 1972] 14074/72 Addition to 1383691 Heading G1M The combination of a template, Fig. 2, and an indexing table, Fig. 2 for checking the profile of teeth of a broach in which the indexing table comprises a circular rotatably mounted plate 9 the periphery of which is equally divided into a plurality of slots corresponding to the number of teeth on a broach to be tested, and including means key 11 for securing the broach to the plate with the teeth aligned with the slots thereof together with plunger 4 engagable with the slots to retain the plate in a plurality of fixed positions, the template consisting of a mount 1 which can be precisely aligned with respect to the plate and having a pattern member 2 having the profile of a correct tooth form located on the mount whereby an accurately aligned shadow of the correct form may be obtained when the indexing table and aligned template is used as a projection measuring machine. In use the indexing table and template are attached to a projection measuring machine so that a tracing of the shadow of a correct tooth may be obtained. The template is then removed and a broach attached for checking.
Patent GB-856230-A (GB)
Title: Improvements in or relating to methods of manufacturing thin diaphragms, and diaphragms made according to these methods
Inventor: BOULET FRANCIS
IPC: C25B13/02
Filed: 1958-05-02
Abstract: 856,230. Electrode materials and processing. COMMISSARIAT A L'ENERGIE ATOMIQUE. May 2, 1958 [May 4, 1957 ; July 23, 1957], No. 14103/58. Class 39(1). [Also in Groups XXII and XXXVI] A method of making a thin reinforced diaphragm comprises pressing a thin metal blank to form stiffening projections or ribs 4 on at least one of the walls and to size the areas 1 of the sheet between the ribs and then subjecting the blank to a transformation treatment, such as an anodising treatment, extending through the blank from the plain face to the bases of the ribs. The blank is preferably of aluminium of 99À99% purity or an aluminium magnesium alloy. The ribs may be formed by a press or a rolling mill and may be as close as six per linear millimetre. The electrolyte for the anodic oxidising treatment is sulphuric acid, oxalic acid, chromic acid, phosphoric acid or mixtures thereof and the operation may be continued until the parts 1 reach the required degree of porosity. The diaphragm may be used for the separation of gases by molecular diffusion or as a target for storage tubes. In the latter case the smooth face is metallised at 5 and the grid may be lined with metal 6 to prevent subsequent oxidation.
Patent GB-1309801-A (GB)
Title: Cameras having automatic shutter electronic exposure control means
IPC: G03B7/083
Filed: 1970-03-24
Abstract: 1309801 Exposure control devices AGFA GEVAERT A G 24 March 1970 [24 March 1969] 14122/70 Heading G2A A camera exposure control device has a photoresistor 18 which forms part of a RC shutter timing circuit and which prior to shutter operation is used to allow energization of an electromagnet 12 and consequent increase in a diaphragm aperture when the brightness falls below a certain value, and allows energization of an indicator lamp 14 if the brightness is still insufficient for an exposure with the increased aperture value. When release 28 is actuated, insufficient illumination of photo-resistor 18 causes transistor 4 to be blocked, transistor 5 is therefore triggered on and setting magnet 12 is excited. Diaphragm ring 38 is allowed to rotate under action of spring 40 to open the aperture and at the same time to move a grey filter 50 from covering relation with photo-resistor 18. Further depression of release 28 causes pin 30 to open contact 19 and close contact 23 to make a series connection between photo-resistor 18 and capacitor 24 which forms the RC shutter timing circuit. The shutter operation however is not initiated until a nose 31 of release 28 has engaged a lever 33 to open contact 11, and thus de-energize electromagnet 12, and to close contact 15. Lamp 14 is thus switched into the collector circuit of transistor 5. Movement of lever 33 also opens contact 22 to switch resistor 20 so that the base of transistor 4 is connected to a voltage divider consisting of resistors 20, 21 and photo-resistor 18. If the illumination of photo-resistor 18 is still insufficient for hand held exposures transistor 4 remains blocked, transistor 5 is rendered conductive and lamp 14 is lit to act as an indicator. Further depression of release 28 is necessary to initiate a shutter release operation. A diaphragm coupled to the camera diaphragm may cover the photo-resistor instead of the grey filter shown.