baber/WOPTO huggingface dataset:
Patent GB-294990-A (GB)
Title: Improvements in a process of making rail-crossings
IPC: E01B7/28
Filed: 1928-08-03
Abstract: 294,990. Grohn, A. Aug. 3, 1927, [Convention date]. Railways and tram. ways, permanent way of. - Tramway &c. crossings are formed by cutting away the railhead in a V-shaped manner as shown in Fig. 3, by fusion, butting the two sections of crossing rail against the through rail and welding the flanges to a cross-shaped base piece P as indicated at u. The pyramidal depression is then filled up solid with welding metal and finally the heads and guard flanges are built up as shown by section lines in Fig. 1.
Patent GB-857208-A (GB)
Title: Press tools for producing cored pressings
IPC: B21K1/24
Filed: 1958-07-16
Abstract: 857,208. Forging. WILKINS & MITCHELL Ltd., and BAILEY, W. July 15, 1959 [July 16, 1958], No. 22748/58. Class 83 (4). A press tool assembly for forming a cored pressing such as a valve body comprises cooperating dies 10, 11 defining a die cavity 17, Fig. 3, which close upon a hot workpiece upon operation of the main press ram 12, and core punches 14, 18, 20 operating in the joint plane of the dies and carried by slides 33, 28 also actuated by the press ram, at least one of the punches 20 being pivoted at 26 to the slide and having arcuate movement derived from the rectilinear slide movement and co-operating cam surfaces 31 or a pivoted link, Fig. 6 (not shown). The lower die 11 is supported on a floating bolster 13 acting through rods 40 on an hydraulic, pneumatic or spring-loaded bolster 39. During descent of the upper die 10 and ram 12, a cam 30 actuates the slide 28 causing the pivoted punch 20 to move inwardly until surfaces 20 and 25 contact, thereby limiting the inner position of the punch before the dies close. A cam surface on the top die 10 cooperates with a surface 42 on the punch to lock it in its inner position. Thereafter both dies move downwardly against the resistance of bolster 39 whereby three side punches 14, 18 actuated by pivoted levers 35, act through die openings 16, 19 to pierce the workpiece and also a lower punch 22 supported on fixed bolster 24 pierces the workpiece from below.
Patent GB-1506240-A (GB)
Title: Polyisocyanates
IPC: C07C239/00
Filed: 1975-05-23
Abstract: 1506240 Blocked aromatic polyisocyanates E I DU PONT DE NEMOURS & CO 23 May 1975 [24 May 1974] 22798/75 Heading C2C [Also in Division C3] An aqueous dispersion of an aromatic polyisocyanate blocked with a pehnolio compound is produced by mixing at from 25 to 75 C. and in the presence of a catalytic amount of an alkali metal hydroxide; (a) an aromatic polyisocyanate in an inert, water-soluble organic solvent, and (b) an aqueous solution of a phenolic compound, the number of moles of phenolic compound being at least equal to the number of equivalents of isocyanate groups present. The mixing is preferably carried out in the presence of an anionic surfactant. The phenolic compound is preferably phenol or resorcinol, and the aromatic polyisocyanate is preferably diphenylmethane-4,4<SP>1</SP>-diisocyanate, toluene - 2,4 - diisocyanate, benzene - 1,3- diisocyanate, diphenylether - 2,4,4<SP>1 </SP>- triisocyanate, or triphenylmethane - 4,4<SP>1</SP>,4<SP>11</SP>- triisocyanate. The aqueous dispersion prepared above may be used in the preparation of a coating solution for polyester substrates.
Patent GB-950823-A (GB)
Title: Improved method of and means for alloying semi-conductor elements
Inventor: BLUNDELL ALAN JOHN
IPC: H01L21/24
Filed: 1959-07-02
Abstract: 950,823. Semi-conductor devices. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. June 20, 1960 [July 2, 1959], No. 22808/59. Heading H1K. The Specification states that when a wafer of impurity metal having an area of one square millimetre or more is heated to alloy it to the surface of a semi-conductor body it forms a droplet which contracts under surface tension reducing the area of contact between it and the base body. In the arrangement shown, the wafer W is arc- or V-shaped so that on heating it collapses suddenly and covers the surface area of the semi-conducting plate PL to be alloyed. The chamber CH in which alloying takes place is maintained filled with an inert atmosphere, e.g. nitrogen, until the wafer collapses when an oxidizing atmosphere is fed through the chamber to decompose or disperse the oxide formed on the outer surface of the wafer. Indium and aluminium are referred to as doping materials and germanium and silicon as semi-conductors.
Patent GB-1253658-A (GB)
Title: Improvements relating to roller-way conveyors
Inventor: SMITH ALFRED GEORGE
IPC: B65G13/00
Filed: 1968-05-14
Abstract: 1,253,658. Roller conveyers. DEXION Ltd. 13 May, 1969 [14 May, 1968], No. 22830/68. Heading B8A. A unit for diverting an article or container from a roller conveyer comprises a diverting roller 1 supported by a bracket 5 rotatably mounted on an annular nylon pad 17. The bracket is spring-urged to the position shown in Fig. 1, but may be rotated through 90 degrees by energization of an electromagnet 23. The roller is driven via bevel gears 2, 6, a vertical shaft 7 and part of a pulley 14 driven by a belt 15, the other part of the pulley being used to drive a further unit if required. Instead of the electromagnet 23, pneumatic means may be used to turn the bracket 5 and control may be manual or automatic. The roller may have a tyre. In Fig. 3 a main conveyer comprises a channel 20 with diverting rollers 1 and freely rotatable rollers 31, 31<SP>1</SP>. Lateral roller-ways having free rollers 32, 35 receive articles diverted from the main conveyer. The vertical shaft carrying one of the bevel gears may be individually driven by an air turbine or electric motor. All the rollers of the Fig. 3 system may be driven and, instead of the gear drive, a diverting roller may be driven frictionally by a continuous belt.
Patent GB-741699-A (GB)
Title: Improvements in lenticular screens and such including photographic layers
IPC: G03C9/00
Filed: 1953-08-19
Abstract: 741,699. Lenticular screens and such including photographic layers. SCHENK, K. Aug. 19, 1953, No. 22885/53. Class 98 (2). The screens, which may be used for the production of stereoscopic images or half-tone images, are made by coating a light-sensitized colloid layer as of bichromated gelatine on to a support, as of glass, synthetic resin foil or paper, exposing through a screen having light-permeable lines or through a lenticular screen to harden the exposed places, and treating with water to swell the unexposed places. The layer may contain also a little silver halide and in this case it may be briefly developed and fixed. The support may have a first-applied silver halide emulsion layer for subsequent image production and a removable filter layer thereover to prevent action on the silver halide by light used to form the screening. A layer as of barium sulphate may be provided between the silver halide emulsion layer and the support, to be reflecting with non-transparent pictures and light-diffusing with transparent pictures. As shown, Fig. 1, a paper support 1 has successively a baryta layer 2, silver halide emulsion layer 3, gelatinebichromate layer 4 and a relatively insensitive fine-grained silver halide layer 5; the material of layer 5 may, however, be mixed with the gelatine of layer 4 and the assembly then treated with bichromate solution. On exposure through a transparent-line or cross screen 6 and processing, the result, Fig. 2, has lenticules 10 and black silver lines 7 therebetween, layer 3 being unaffected because of light-absorption by the bichromate layer 4. Image-wise exposure and processing then produces image-points 9, the silver lines 7 preventing undesired exposure which would cause diffraction and refraction errors as indicated in Fig. 3. Fig. 4 is a plan view of the screen 6, and Figs. 5, 6 section and plan views respectively of the resulting screen.
Patent GB-187783-A (GB)
Title: Stage properties for entertainment purposes
IPC: A63J5/12
Filed: 1921-08-30
Abstract: 187,783. Legros, L. A. Aug. 30, 1921. Theatrical appliances.-Apparatus for use in an exhibition of jumping comprises a long " invisible " wire by which the performer or a dummy figure is suspended, and a spring suspension device to which the upper end of the wire is connected, the tension of the spring being adjusted in relation to the load on the wire in such a manner that its frequency of oscillation is twice that of the free pendulum. A spring s is clamped to a frame b, pivoted in fixed brackets c', by clips d. By slacking the bolts on the clips, the spring can be screwed up or down, until its ' period of oscillation when extended and released is twice the time of swing of the pedulum formed by the load g the wire wand the spring. The load g may consist of a performer who appears to jump freely, the wire w being invisible. The spring s may be replaced by a torsion spring or by an air spring comprising a piston sliding in a cylinder. In the latter case, the cylinder is connected through a non-return valve with an auxiliary air reservoir to make up for any leakage of compressed air from the cylinder during the performance.
Patent GB-398816-A (GB)
Title: Improvements in or relating to compressing fastening members on the stringers of sliding clasp fasteners
IPC: A44B19/46
Filed: 1932-02-11
Abstract: 398,816. Sliding-clasp fasteners. WINTERHALTER, M., 19, Davidstrasse, St. Gallen, Switzerland. Feb. 11, 1932, No. 23006/33. Convention date, Jan. 11, 1932. Divided on 400,195. [Class 44.] Means for compressing the jaws of sliding- clasp fastener members 10 to secure them on the edge of the stringer I comprise a pair of cylinder segments 17, 18 mounted by ballbearings 13 in a casing 12 so that they can be oscillated. Members 17, 18 are recessed as shown at 20, 21 to receive the stringer held in a template 9 carried by a supporting rail 8 which can be raised by eccentrics 5 to press the fastener members against the bottom of the recess and so press them home on the stringer. Downward movement of a wedge 22 separates the upper edges of the members 17, 18 and so oscillates said members in the casing, causing the sides 32, 33 of the recesses to compress the jaws of the fastener-members on to the stringer. The wedge is carried by a ram operated by eccentric or other means, not shown, and bears against antifriction rollers 25, 26 carried by the segments.
Patent GB-920558-A (GB)
Title: Cooling dynamo-electric machines
IPC: H02K3/24
Filed: 1961-06-26
Abstract: 920,558. Cooling dynamo-electric machines. WESTINGHOUSE ELECTRIC CORPORATION. June 26, 1961 [Aug 12, 1960], No. 23024/61. Class 35. A dynamo-electric machine has the air-gap divided transversely into a number of annular zones and cooling gas is fed to alternate zones from where it passes through longitudinal channels in the rotor to the other zones. In the Figure, hydrogen is pumped by a blower 23, through a cooler 29 to a chamber 30. Part of it passes along a duct 31 and via apertures 35 and radial ducts such as 4 to regions of the airgap. These regions are bounded by annular rings 24 and 25 on the stator and rotor respectively and prevent substantial flow of the gas directly between the regions so that it flows into radial channels 26 in the rotor conductors, along a longitudinal channel in each conductor and then out through further radial channels to the adjacent air-gap region. From there it flows through radial channels in the stator core and back through apertures 38 to a chamber 36 supplying the inlet of the blower. The gas from the end part of the rotor flows out, as indicated, from the ends of the air-gap. Some of the gas from the cooler 29 also passes along a channel 33 and through the rotor end turns 16 at one end of the rotor and some also passes to the end of duct 31 and through end turns 16 at the other end. A separate circuit, including pump 55, cooler 56 and duct 57 passes liquid or high-pressure hydrogen through the stator conductors. The annular rings 24, 25 which divide the air gap may be removably held by dovetails fitting into the winding slots and may be formed from a plurality of segments (Fig. 2, not shown). Alternatively retaining-members may be provided (Fig. 3, not shown). In a further embodiment (Fig. 5, not shown), the rings are of rubber and are deflatable to permit the rotor to be readily removed. Specification 851,155 is referred to.
Patent GB-486508-A (GB)
Title: Improvements relating to television
IPC: H04N5/84
Filed: 1936-08-21
Abstract: 486,508. Television. I. G. FARBENINDUSTRIE AKT.-GES. Aug. 21, 1936, No. 23048. Void. Convention date, Aug. 21, 1935. [Class 40 (iii)] Relates to a process for producing, for the purpose of television transmission, a photographic film which records scenes that have been photographed at different times and places, such a film being adapted for transmitting an evening programme including a summary of events of the day. The events are televized as they occur, and the pictures are transmitted to a central station where they are recorded on intermediate films which are developed and combined to form a film for subsequent broadcast transmission. According to the invention, in order to ensure photographic uniformity of the intermediate films, the objects televized or the film itself are scanned photometrically to measure the intensity of illumination of the pictures, and the photographic conditions, e.g. the type of film used, the time of development or after-treatment of the film are chosen or controlled according to the photometric data. The control may be automatic. Thus, the time of development may be controlled by the photometer, or the range of blackening may be regulated by control either of the televizing iconoscope or of the cathode-ray tube at the central station.
Patent GB-420115-A (GB)
Title: Process for cracking and coking mixtures of hydrocarbon oils and solid bituminous materials
Filed: 1933-08-18
Abstract: <PICT:0420115/III/1> Mixtures of oils and solid or semisolid bituminous materials are coked by passing the mixture heated in a coil 6 to about 470 DEG  C., through a pipe 8 into a non-externally heated coking zone 10 in which coking temperatures are maintained by introduction of a heated medium into contact with the bituminous materials while in the form of thin films or of individualized particles.  The medium may be obtained independently, but preferably products of the reaction are employed, i.e., (a) the reflux forming at the bottom of the fractionating tower 13 (b) a distillate collected from the middle of the tower 13 through a pipe 49, (c) the incondensible gases separated in a receiver 19 from the final distillate led off from the tower 13 through a pipe 15 and condensed in a cooler 16, (d) part of the light distillate itself, or (e) a mixture of some of these products.  The medium is raised to the required temperatures, e.g., over 500 DEG  C. by passage through a heated coil 29 and then injected into the drum 10 through a pipe 41 or through a line 42<1> into the coal, oil mixture as it passes through the pipe 8 to the coking drum.  The point of introduction of the medium may be raised as the coke builds up in the drum.  The film of materials in the drum 10 is formed by spraying the materials onto the wall of the drum or by maintaining a thin layer above the coke formed in the bottom of the drum.  A plurality of coking zones may be employed, and steam, &c., may be introduced through the drain line 47.
Patent GB-638970-A (GB)
Title: Improvements in or relating to front edge detector mechanism for use in sheet feeding apparatus
IPC: H04Q3/42
Filed: 1947-08-05
Abstract: 638,970. Feeding sheets. BACKHOUSE, H. T. Aug. 5, 1947, No. 23078/48. Divided out of 638,924. [Classes 100 (i) and 100 (ii)] Sheet-feeding apparatus as described in Specifications 580,346 and 609,772, in which feeler devices for controlling the operation of sheet-feeding apparatus such as stream feeders are arranged adjacent to the front stops for stopping the machine if a sheet is not fed correctly to the stops, is constructed with a feeler carried on one end of a horizontally extending supporting arm which is pivoted to a support member for partial rotation about a transverse horizontal axis, and means are provided for rocking the supporting arm in timed relation with the sheet-feeding means to lift the feeler, after engagement with a correctly placed sheet, upwardly from the layboard to facilitate removal of each registered sheet in turn, and then to return the feeler to its initial position. One form of carrying out the invention is described in connection with Specification 638,924, and another form comprises a pivoted telescopic supporting arm 110 for supporting the feelers, and the underside of the arm is formed with a surface 114 to act as smoother for the sheets as they approach the stops. To facilitate the action of the smoother, the arm 110 is moved about a pivot 111 by means of a cam surface 126 on the sensing arm 104 which is oscillated in synchronism with the sheet-feeding machine. The position of the arm 110 is normally controlled by a stop screw 113, which engages a projection on the end of the arm close to the roller 127 which is engaged by the cam 126. The feeler comprises a pivoted counterweighted member 115 and a freely mounted bell-crank 116 which engages the feeler. A normally fed sheet moves the feeler and bell-crank 116 to the dotted line position out of reach of a reciprocating notched rod 120 adjustably connected to the sensing arm 104. If, however, the feeler is not moved by a sheet, the bell-crank 116 engages the notched end 123 of rod 120 and thus prevents oscillation of the arm 104 and causes stopping of the sheet feeder in known manner. Specification 609,772 is referred to.
Patent GB-700539-A (GB)
Title: Improvements in ingot moulds
IPC: B22D7/10
Filed: 1951-10-04
Abstract: 700,539. Ingot moulds. VITKOVICKE ZELEZARNY KLEMENTA GOTTWALDA and NECKA, J. Oct. 4, 1951 [Oct. 4, 1950], No. 23176/51. Class 83 (1) In order to prevent piping, an ingot mould 1 is provided within the head with a refractory insert 4 having a bore open at its upper end and closed at its lower end except for an aperture 7, of smaller cross-section than the bore. The insert is suspended from the top of the mould by wires 5 which project into recesses 6 of the insert and which may be shortened or lengthened to adjust the position of the insert to the desired depth of the ingot to be cast. The insert may be in semi-circular parts pressed against the wall of the mould by wooden wedges 8. The metal may be poured into the mould at the bottom.
Patent GB-685662-A (GB)
Title: Colour television receivers
IPC: H04N11/12
Filed: 1950-09-21
Abstract: 685,662. Colour television. RADIO CORPORATION OF AMERICA. Sept. 21, 1950 [Sept. 24, 1949], No. 23205/50. Class 40 (iii). A television receiver for co-operation with a colour television transmitter as described in Specification. 680,783, wherein the low-frequency portions of the outputs from three colour cameras are commutated in rapid succession and thus transmitted sequentially and are combined subsequently to the commutator with high-frequency components from one or more of the cameras representing the detail in the transmitted picture, comprises a commutating device for separating the sequential colour components into respective channels, a circuit for by-passing the signals representative of detail around the commutating device, and circuits for combining the detail signals with the signals in one or more of the colour channels. Fig. 5 illustrates a receiver for use with a transmitter, Fig. 1 (not shown), wherein the output from each colour camera having a bandwidth of 0-4.2 Mc/s. is passed through a 0-1.4 Mc/s. filter and commutated at 2.8 Mc/s., the detail signal by-passing the commutator being derived by combing the outputs from all the cameras and passing the combined signal through a 1.4-4.2 Mc/s. filter. The output from receiver 61 is switched by commutator 10, which in practice is an electronic device, to colour channels 82, 84, 86 at the appropriate rate of 2.8 Mc/s. The outputs from the colour channels, which each comprise a 0-1.4 Mc/s. filter, are applied to respective cathode-ray tubes, the displays on which are combined optically to reproduce the transmitted picture in colour. The detail signal is taken from the output of receiver 61 via the 1.4-42 Mc/s. filter 94 to the mixer 96 where it is combined with the green-channel signal and applied to the " green " cathode-ray tube 88. The receiver also comprises a synchronizing-signal separator 64 which controls a scanning waveform generator 66 and also provides signals for synchronizing the commutator derive circuit 70 and for controlling the " interlacing " oscillator 68 for the production of " dot-interlace " as described in Specification 680,783. In a modification, Fig. 11 (not shown), a filter tuned to reject 2.8 Mc/s. is placed in series with the filter 94 to prevent the passage of a 2.8 Mc/s. component produced by the commutator to the receiving cathode-ray tubes, and otherwise producing a noticeable dot-structure. Arrangements are also described in which the detail signal is applied to all three receiving cathode-ray tubes in parallel and in which it is applied to the " green " and " red " tubes only. In another modification the commutation rate is made 3.8 Mc/s. and the low-pass filters have a 0-2 Mc/s. passband while the high-pass filter has a 2-3.5 Mc/s. pass-band. In this arrangement there is no need for an additional filter in series with the high pass filter since the commutation rate does not lie within its pass-band. Specification 685,661 also is referred to.
Patent GB-794400-A (GB)
Title: Improvements in rubber-and-resin compositions
IPC: C08F279/04
Filed: 1956-07-27
Abstract: A rubber-resin composition comprises (A) 20 to 75 parts of an emulsion polymerized butadiene homopolymer or copolymer containing not more than 5 per cent of a copolymerized mono-olefinic compound containing a terminal methylene group, and correspondingly (B) 80 to 25 parts of an emulsion copolymer of a mixture of 25 to 90 per cent of styrene and 75 to 10 per cent of acrylonitrile, at least 25 per cent of the styrene-acrylonitrile copolymer having been prepared by emulsion polymerization in admixture with the latex of the synthetic rubber (A), the amount of dispersing agent in the latex being maintained at not more than 5 parts per 100 parts of synthetic rubber and styrene-acrylonitrile copolymer contained therein until at least half the styreneacrylonitrile monomer mixture has been converted to polymer.  Polymerization of the styrene and acrylonitrile in the presence of the butadiene polymer results in the formation of graft polymers.  Monomers specified which may be copolymerized with butadiene are styrene, alpha-methyl styrene, vinyl toluene, acrylonitrile, ethyl and butyl acrylates and methyl methacrylate. The polymerization of the styrene and acrylonitrile in the synthetic rubber latex is carried out in the presence of a catalyst, e.g. potassium persulphate, which may be used in conjunction with sodium bisulphite, an emulsifier, e.g. sodium stearate or a sodium rosin soap, and optionally a mercaptan, e.g. tert.-octyl mercaptan and mixed C12-C16 tert-.alkyl mercaptans; during polymerization further quantities of styrene, acrylonitrile and catalyst may be added as the reaction proceeds. If the whole amount of styrene and acrylonitrile is not polymerized in the synthetic rubber latex a copolymer of these monomers is prepared separately and then added to the synthetic rubber-styrene-acrylonitrile graft polymer; in an example of this process styrene and acrylonitrile are copolymerized in an aqueous medium containing an alkyl aryl sulphonate emulsifier in the presence of potassium persulphate, sodium bisulphite and mixed C12-C16 tertiary mercaptan.  Specification 694,166 is referred to.