baber/WOPTO huggingface dataset:
Patent GB-230152-A (GB)
Title: Improvements in cinematograph projection
IPC: G03B41/06
Filed: 1923-11-29
Abstract: 230,152. Taylor, A., and Taylor, H. D. Nov. 29, 1923. Kinematograph apparatus.-In a continuousfeed projector, the gate has a height not exceeding one picture pitch, and compensation for the movement of the film F is effected by reflection from an outwardly reflecting drum M of at least 48 flat mirrors ranged evenly and cylindrically. The rotation of the drum is so synchronized with the travel of the film that the angle of reflection with the perpendiculars to the mirrors changes at half the rate of the angular movement of the pictures as subtended at the back principal point of the lens F. In such an apparatus, the lens described in Specification 210,705 is preferably utilized so that the virtual stop or the image of the electric arc is situated at such a distance in front of the lens as to fall upon the mirrors of the rotating drum. The optical principles involved in the production of good definition in the image projected by the above arrangement of apparatus are discussed at length in the Specification. The mirrors are preferably of tapered form across the width of the drum, Fig. 5, the mean width in the direction of movement being about one-sixth of the focal length of the projector lens. Each mirror is supported upon two independent rocking frames l and a stud s on the drum, and held in contact with studs s, s<2> on the frames l and the stud s by spring clips 6 as shown. The frames l or each provided underneath with two rounded edged knife edges k riding in grooves in the drum at right-angles to the radius of the drum through the centre of each mirror. The other ends of the frames rest on points of adjusting screws a. A spring p keeps the frames l bearing on the grooves. Each mirror is thus supported on three points and is adjustable by means of a single screw a. When an internally reflecting drum, Fig. 10, is used the projector lens L is situated so that the optical axis is at an angle of about 30‹ to the perpendicular to a mirror centrally opposed to it, and the image is projected on to a screen by means of an inclined mirror R. Specifications 178,474 and 184,258 also are referred to.
Patent GB-1089044-A (GB)
Title: Process for producing foamed polypropylene monofilament
IPC: D01F6/04
Filed: 1966-07-05
Abstract: Foamed and oriented polypropylene monofilaments having a diameter of 0.1 to 0.5 mm., a density of less than 0.6 g. per c.c. and a tenacity of at least 3.5 grams per denier, said monofilaments having a fine uniform cellular structure, are made by extruding through a die one or more monofilaments from a mixture of polypropylene and a blowing agent at a temperature above the softening temperature of said mixture, passing the monofilament or monofilaments into a water quench bath within a distance not greater than 6 mm. from the face of the die while maintaining the temperature of the bath at between 10 DEG  and 80 DEG  C. and orienting the monofilament or monofilaments by drawing at a draw ratio in the range 3:1 to 8:1. The polypropylene used in the practice of the invention is the crystalline polymer of propylene often referred to a stereo regular polypropylene of isotactic or syndiotactic configuration. Blowing agents used are materials that yield at least one mole of gas per mole of blowing agent at the softening temperature of the polypropylene mixture. Specified blowing agents include azobis formamide, diazoaminobenzene, N,N1 - dinitrosopentamethylene tetramine, N,N1 - dimethyl - N,N1 - dinitrosoterephthalamine, para, para1 - oxybis(benzenesulphonyl semicarbazide), azobis(isobutyronitrile), para,-para1 - oxybis(benzenesulphonyl hydrazi e), para,para1 - diphenyl bis(sulphonyl hydrazide), benzenesulphonyl hydrazide, meta-benzene bis-(sulphonyl hydrazide), and solvent blowing agents as, for example, monochlorotrifluoromethane, monochlorodifluoromethane, dichlorotetrafluoroethylene, trichloroethylene, chloroform, carbon tetrachloride, and low boiling hydrocarbons, e.g. butane, pentane, and hexene. The polypropylene can also contain other materials such as stabilizers, pigments, extrusion aids, and cross-linking agents. Preferably, the quench bath temperature is 15 DEG  to 70 DEG  C., and the die orifice is circular and of diameter 0.4 to 0.8 mm., especially 0.5 to 0.8 mm.  The extrusion temperature is preferably from 180 DEG  to 250 DEG  C. and especially from 190 DEG  to 210 DEG C.  The preferred draw ratio is from 5:1 to 7:1.  Extrusion pressures vary with the particular blowing agent and range from atmospheric to as high as 2,000 or 4,000 p.s.i.  After the foamed monofilament is quenched, it may be heat softened to facilitate drawing, suitably effected in conventional manner, e.g. by conducting the filament over heated rolls or through a heating chamber maintained at about 80 DEG to about 150 DEG  C.  The softened filament is then longitudinally stretched.  Examples relate to the spinning of a mixture of stereoregular polypropylene containing 0.54% by weight of 1,11-azobis-formamide.
Patent GB-915473-A (GB)
Title: Improvements in or relating to starch derivatives and the use thereof in sizing of paper
IPC: D21H17/17
Filed: 1960-09-01
Abstract: The invention comprises a cationic-nonionic starch derivative in which the starch is substituted by <FORM:0915473/IV(a)/1> groups and R4 groups wherein R1 is alkylene or hydroxyalkylene; R2 and R3 are alkyl, aryl, aralkyl, cycloalkyl or heterocycloalkyl; and R4 is hydroxyalkyl. Specified compounds are dimethylaminoethyl hydroxyethyl starch, dimethylaminoethyl hydroxypropyl starch, diethylaminoethyl hydroxyethyl starch, diethylaminoethyl hydroxypropyl starch, and morpholinoethyl hydroxypropyl starch.  These compounds may be made from raw starch, dextrinized starch, hydrolysed starch or oxidized starch by treatment with an alkylene oxide and dialkylaminoalkyl halides, such as b -dimethylaminoethyl chloride, b -diethylaminoethyl chloride, b -dimethylaminoisopropyl chloride, 3-dibutylamino-1,2-epoxypropane, 2-bromo-5-diethylaminopentane hydrobromide, morpholinoethyl chloride, N-(2,3-epoxypropyl) piperidine, and N,N-(2,3-epoxypropyl) methyl aniline; the chloro and bromo groups may be interchanged and the free amines or the hydrochlorides may be used; and with a hydroxyalkylating agent such as propylene oxide, ethylene oxide, sodium 2,3-epoxypropane sulphonate, ethylene chlorohydrin, propylene chlorohydrin and sodium 2-hydroxy-3-chloropropane sulphonate.  Temperature of 60 DEG -70 DEG C. are used and the medium is rendered alkaline by the addition of sodium or potassium hydroxide, trimethylbenzyl ammonium hydroxide or dimethyldibenzyl ammonium hydroxide.  The compounds may be used to produce the continuous phase of a paper size in which the disperse phase is a higher organic ketene dimer having the formula [RCH=C=O]2 where R is an alkyl radical having at least 8 carbon atoms, a cycloalkyl radical having at least 6 carbon atoms or an aryl, aralkyl or alkaryl radical.
Patent GB-1389083-A (GB)
Title: Hook gate for flat bed sewing machines
IPC: D05B73/00
Filed: 1972-06-28
Abstract: 1389083 Sewing machine NECCHI SpA 28 June 1972 [20 July 1971] 30306/72 Heading DIG A sewing machine having a flat bed providing a recess 10 in which a rotatable hook 12 is mounted is provided with a plate 17 slidable from a first position where it covers the hook 12 to a second position when the hook is accessible, the plate being provided with a surface 42 which engages with a latch bracket 13 pivoted at 29 to engage and retain a bobbin (24, Fig. 1 not shown) in the hook, movement of the plate 17 from its first position to the second swinging the bracket 13 clear of the hook (Fig. 2 not shown) while return movement of the plate returns the bracket. A second surface 43 on the plate 17 cooperates with a stop 46 in the bed to define the second position. There is provided, within the recess a slot (47, Fig. 1 not shown), in which slides a lever (48) to lower the feed dog from a working position when darning is required. Indicia (49, 50) associated with the respective positions of the lever indicate the mode of operation.
Patent GB-341003-A (GB)
Title: Process for the production of sensitised photographic films and copying or duplicating materials
IPC: G03C1/496
Filed: 1929-10-07
Abstract: 341,003. Photographic films. RADO, L., 10, Bismarckstrasse, Wannsee, Berlin. Oct. 7, 1929, No. 30339. Convention date, Oct. 17, 1928. [Class 98 (ii).] Light sensitive layers in the form of films of cellulose derivatives (e.g. hydrates) are attached by a permanent fixitive agent to a support. The support may be a metal foil (e.g. aluminium) which may be reinforced bv paper or fabric : alternatively both sides of a metal foil (e.g. of the order À009 mm.) may carry sensitive foils (e.g. each of the order of À05 mm.). The finished image or images are protected by a varnish coating.
Patent GB-519390-A (GB)
Title: Improvements in or relating to liquid actuated valves such as steam traps
IPC: F16T1/26
Filed: 1938-10-20
Abstract: 519,390. Fluid-pressure servomotors; steam traps, ELECTRO-CHEMICAL ENGINEERING CORPORATION. Oct. 20, 1938, No. 30415. Convention date, Oct. 20, 1937. [Class 135] [Also in Group XIII] A liquid actuated valve 80, Fig. 3, such as a steam trap for discharging impure boiler water from a boiler under steam without loss of steam, comprises a two-part casing, namely, a lower chamber 85 locating a bucket float 118, and an upper member 86 with a wall 89 dividing it into inlet and outer chambers 91, 92 provided respectively with an inlet pipe 18' for impure water, collected in and discharged from a basin suspended within the boiler as described in Specification 481,988, [Group XIII], and an outlet pipe 23<1> therefor, communication between the two pipes 18', 23' being controlled by pistonoperated valves 96, 101 which are themselves controlled by a pilot valve 110 connected to the bucket 118 by a rod 115. The parts are normally in the position shown and remain in this position until impure water flowing into the chamber 85 through the pipe 18<1> reaches the level of the top of the bucket 118, when the water rapidly fills the bucket and causes it to sink, thus lowering the valve 110 and opening a passage 108 in the stem of the valve 101 to put the space 107 between the pistons 105, 106 of the valves 96, 101 into communication with the float chamber which is under boiler pressure. The valves will then open and permit water from both the bucket 118 and the inlet pipe 18' to flow therethrough to the outlet pipe 23' until the bucket is emptied and consequently rises, closing the pilot valve 110 and permitting closure of the valves 96, 101, the latter by leakage of steam past the pistons 105, 106. In a modification, Fig. 2, the float chamber is provided with the impure water inlet pipe 18 and the upper member with the outlet pipe 23, and also an additional sludge-water pipe 22 leading from the blow-off valve of the boiler. The valves 55, 56 are normally maintained closed by the pressure of leakage steam in the space between the pistons 51, 52 of said valves, the steam pressure being reduced and the valves being caused to open when exhaust ports 59 in the valve 56 are uncovered by the float-controlled pilot valve 61. A by-pass fitted with a non- return valve may connect the pipes 18, 22.
Patent GB-304551-A (GB)
Abstract: 304,551. Siemens & Halske Akt.- Ges. March 3, 1928, [Convention date]. Addition to 291,030. Cables with conductive shields.-A cable of the type described in the parent Specification in which the conductors with the loading coils are shrouded with conducting sheaths insulated from earth, is now formed so the propagation value of the electrical disburbances on the sheath is practically equal to the propagation value on the conductors. It is stated that such values will be practically equal when the resistance of the sheath is given a value corresponding to the capacity present in the sheath, so that the product of resistance and capacity per unit length shall be equal for the conductor and the sheath.
Patent GB-1150261-A (GB)
Title: An Improved Mine Roof Support.
Inventor: MARTYN PETER HENRY
IPC: E21D23/00
Filed: 1965-07-17
Abstract: 1,150,261. Advancing mine roof supports. W. E. and F. DOBSON Ltd. 28 July, 1966 [17 July, 1965], No. 30467/65. Heading E1P. In an advancing mine roof support having a rectangular base 1 of such a width as to seat at least two props 7, 8 flanking an advancing jack 11, 12, 19 the base incorporates side members 2, 3 capable of limited flexure under load and end members 4, 5 shaped as at 4a to accommodate the jack, the member 5 being constituted by a plate and the members 4, 5 providing limited torsional flexibility of the base. The support is also provided with a flexible shield 23, side shields 24, 25 and a pivoted cantilever extension 18.
Patent GB-1385148-A (GB)
Title: Process for preparing alkyl or cycloalkyl nitroacetoacetates
IPC: C07D271/08
Filed: 1973-06-27
Abstract: 1385148 Nitroacetates and nitroacetoacetates ALLIED CHEMICAL CORP 27 June 1973 30645/73 Heading C2C An alkyl or cycloalkyl nitroacetoacetate is made by reacting an alkyl or cycloalkyl acetoacetate at below 25‹ C. in the presence of an acidic catalyst. The catalyst may be a strong inorganic or organic acid, a Lewis acid or a sulphuric acid cation-exchange resin. The products may be converted into alkyl or cycloalkyl nitroacetates by adding a nucleophile, e.g. water, a lower alcohol, ammonia or a primary or secondary amine.
Patent GB-1083946-A (GB)
Title: Control of thyristors
IPC: H02M1/088
Filed: 1965-07-19
Abstract: 1,083,946. Triggering thyristors. SIEMENSSCHUCKERTWERKE A.G. July 19, 1965 [July 18, 1964], No. 30698/65. Heading H3T. A circuit for simultaneous triggering of a number of thyristors includes two transformers for each thyristor, one of which supplies a steepfronted pulse to initiate conduction and the other of which supplies a pulse of sufficient amplitude and duration to provide the necessary triggering energy. In Fig. 3 thyristors 2, 3, 4 are fired by steep-fronted pulses through small transformers 8, 9, 10 having low leakage inductance, whose primaries are supplied through (optional) capacitors 43, 44, 45. The blocking diodes 32, 34, 36 are preferably fast-acting. The main triggering energy is supplied through large transformers 11, 12, 13. Additional windings are fed with a separate control voltage through resistors 40, 41, 42 to magnetize the cores of the transformers in the opposite sense. The transformers are triggered by an auxiliary thyristor 38 with a capacitor quenching circuit (not shown). A transistor pulse-amplifier (Fig. 2, not shown) may be included between the transformers and the thyristors 2, 3, 4. This comprises an emitter-coupled monostable circuit (13, 14) triggered by the transformer 8 and followed by an amplifying stage (23). The main triggering pulse is supplied through a full-wave rectifier (26, 27) and smoothing capacitor (28).
Patent GB-837666-A (GB)
Title: A dough dividing and dough working machine
IPC: A21C5/08
Filed: 1958-09-25
Abstract: 837,666. Dough-dividing machines. SCHRODER, H. Sept. 25, 1958 [Sept. 26, 1957], No. 30706/58. Class 87(2). A dough-dividing machine is actuated by mechanism in which a worm wheel 13, driven from a motor through a worm and shaft 14, 15, carries on its face a pin 17 with a roller 18 mounted thereon and a cam 19 which has a smaller radius of action than that of the roller 18. At the end of a pressing operation the roller 18 engages the cam edge 11 of a lever arm 101 thus causing the knife assembly to be set in motion by the actuation of the transmission train comprising a shaft 10, a lever 9, a rod 91, a lever 7, a shaft 3, a quadrant 4 and a rack 5. As the roller 18 reaches the end 20 of the lever arm 10<SP>1</SP> the bottom edge of the knife assembly 6 bears on the surface of the plate 27 which carries the dough so that at this instant the knives will have cut through the dough completely. Any lumps of dough which may be lodged under the plate 27 become flattened so that the plate is in its normal position. When the end 20 of the lever arm 10<SP>1</SP> loses contact with the roller 18 the action of the weight 71 is to deflect it into contact with the cam 19 so causing the knife assembly 6 to be slightly raised from the surface of the dough carrier plate 27. It is therefore impossible for the bottom edge of the knife assembly to scrape on the carrier plate 27, so chipping it during the ensuing dough working operation. Continuing its rotation, the worm wheel 13 brings the roller 18 against a cam edge 23 on a lever 22, the movement of which through a rod 25 deflects the lever 10<SP>1</SP> to cause the knife assembly 6 to be retracted to its upper position. A recess 24 in the lever 22 enables the knife assembly to be raised and lowered by hand.
Patent GB-287812-A (GB)
Title: Induction manifold system for internal combustion engines
IPC: F02M1/00
Filed: 1927-11-16
Abstract: 287,812. Murray, T. B., and Albion Motor Car Co., Ltd. Nov. 16, 1927. Vaporizers, external. - An induction system, including a hot spot, comprises a pipe 2 connected to a carburettor and a chamber 1 constituted by a conical partition 7, behind which exhaust gas, or cylinder cooling water, is circulated and separate pipes 3 - - 6 leading to each cylinder, the pipes on either side being parallel to one another where they leave the chamber 1.
Patent GB-337565-A (GB)
Title: Improvements in internal combustion engines combined with exhaust turbine driven compressors
IPC: F02B37/00
Filed: 1929-10-10
Abstract: 337,565. Buchi, A. Nov. 7, 1928, [Convention date]. Pumps; four-stroke-cycle engines.-In a doubleacting multi-cylinder engine each half of the engine exhausts into a turbine 11 or 12 driving an air compressor. Each compressor supplies air to both ends of the cylinders of its associated half of the engine; connections 27 may be provided between the two sets of air supply piping. The upper ends of the cylinders of one half of the engine deliver to one admission chamber of the associated turbine, and the lower ends to another admission chamber of the same turbine. The ignition sequence is set out in the description.
Patent GB-376144-A (GB)
Title: Improvements in or relating to sewing machines for attaching fastening means to garments and the like
IPC: D05B3/18
Filed: 1931-11-06
Abstract: 376,144. Sewing-machines. ROSEMAX, L., 16, Johnson Avenue, Newark, New Jersey, U.S.A. Nov. 6, 1931, No. 30854. Convention date, Nov. 10, 1930. [Class 112.] Stop means for preventing a sewing - machine needle from striking a metal fastener, e.g. hooks, eyes or eyelets on a fastener tape, in attaching same to garments, by arresting movement of the fastener at a point in advance of the needle path and prior to its descent are oscillated vertically in synchronism with each stitch forming operation of the machine. The stop means may comprise an arm 25, Figs. 1 and 4, with a downwardly directed stop finger 27 extending in a direction parallel to the line of feed on. a rock shaft 24 journalled in bearings 22, 23 on a bearing bracket 21 secured on the bedplate 15 of the machine inward of the sewing mechanism. The arm 25 is adjusted in position vvith the forward. face of the finger 27 in front of the plane of the needle, and the finger is urged to the bedplate by a torsion spring 31 or by a tension spring 36 or both, an adjustable stop 33 being provided to prevent the finger from bearing too heavily on the work. The arm 25 is oscillated vertically in synchronism with the sewing mechanism, to permit work feed and against the springs 31, 36, by a cam 37 on the main driving-shaft 16, and an arm 38 on the rockshaft 24 extending down through an opening in the bedplate 15. A channelled guide plate 42 for the fastener tape T is provided and also a step 41. on the inner margin of the throat plate to support the tape in sewing position. An adjustable stop plate and garment gauge 44 of spring metal is mounted on a slidable cover-plate to bear on the fasteners as the tape is fed forwards to arrange them in correct position and prevent pulling back of the tape. When the presser foot 19 is raised from the work a projection on the presser bar may engage a shoulder on a disc mounted on the rock shaft to lift the finger 27 also from the work. The machine may be of the kind wherein the needle has a simple reciprocatory movement, or it may be of the oscillating type to swing forward with the work.
Patent GB-683655-A (GB)
Title: Improvements in or relating to copolymers of vinylidene cyanide with aliphatic conjugated diolefins
IPC: C08F22/34
Filed: 1950-12-19
Abstract: Copolymers of vinylidene cyanide and an aliphatic conjugated diolefin having the structure <FORM:0683655/IV (a)/1> where M1 is a vinylidene cyanide unit, M2 is a unit of diolefin and X is a polydigit number are made by polymerizing in the presence of a free radical polymerization catalyst, a mixture of the monomers in an organic liquid solvent which is more than 70 per cent of the total solution. If desired, monomer and/or catalyst and/or solvent may be added continuously or intermittently during the process.  Specified diolefins are butadiene-1,3, 2-methyl butadiene-1,3, piperylene, 2,3-dimethyl butadiene-1,3, 1-ethyl butadiene-1,3, and 2-methyl pentadiene-1,3.  Solvents mentioned are benzene, toluene, xylenes, propylbenzene, butyl benzene, amylbenzene dichloroethane, trichloroethane and chlorobutane.  The catalyst may be silver peroxide, benzoyl, caprylyl, lauryl, acetone, acetyl benzoyl, o-o1-dibromobenzoyl, o-o1-dichlorobenzoyl, or pelargonyl peroxide, t-butyl hydroperoxide or cumene hydroperoxide.  The copolymers may be used in the melt spinning of filaments which may be cold drawn, in the manufacture of moulded articles and for the casting of films. Specifications 653,468 and 654,957 are referred to.
Patent GB-648134-A (GB)
Title: Improvements in a shower bath having a plurality of bathing compartments
IPC: A47K3/28
Filed: 1948-11-30
Abstract: 648,134. Shower baths. THORNTON, A. A. (Bradley Washfountain Co.). Nov. 30, 1948, No. 31028. [Class 26] A shower bath is formed with a number of separate compartments and comprises a central standard 6, a number of peripheral uprights 7, a partition 12 arranged between the standard 6 and each upright 7 and means for bracing the uprights 7 to each other and to the central standard 6. The standard 6 has a fitting 20 through which project pipes 16 having a spray 19 for each compartment, the pipes 16 connecting to a chamber 15 for mixing hot and cold water. The circumferential braces 26 between adjacent pairs of uprights telescope within each other at their ends where they pass through openings in the uprights 7 and the radial braces 23 also pass into other openings 25, a pin 29 serving to lock the circumferential and the radial braces, the inner ends of the radial braces being secured to the central fitting 20 by a nut 34 which by drawing the brace 23 towards the centre deforms the pin 29 as shown and prevents its undesirable withdrawal.
Patent GB-508174-A (GB)
Title: Improvements in and relating to building blocks
IPC: E04B2/36
Filed: 1938-10-27
Abstract: 508,174. Building - blocks. TRIGGS, W. W. Oct. 27, 1938, No. 31126. [Class 87 (i)] A building-block of T-, Z-, or L-shape in plan is provided with recesses in those side faces which extend in the direction of the joints between adjacent blocks ; the recesses provide in the finished structure, spaces closed on all sides. Recesses 1 are provided in one or more of the surfaces S. They may be of various vertical sections and extend out to the lower face of the block. Recesses may be provided also in the lower face of the block and the upper edges of the block may be bevelled.