baber/WOPTO huggingface dataset:
Patent GB-795466-A (GB)
Title: Improvements in or relating to junction transistors
IPC: H01L29/36
Filed: 1954-10-21
Abstract: 795,466. Semi-conductor devices. SIEMENS & HALSKE AKT.-GES. and ALLGEMEINE ELECTRICITATS GES. Oct. 21, 1954 [Oct. 21, 1953; July 14, 1954], No. 30373/54. Class 37. The conductivity of the base zone of a junction transistor varies in a direction from the emitter to the collector so as to provide a continuous electric field across the base zone. The conductivity variation may be produced by providing variation of impurity concentration across the zone and/or by employing two materials for the semi-conductor body which have different energy gaps, and varying the semi-conductor composition across the zone. The change in impurity concentration may be exponential, being greatest at the emitter junction, and may be produced by diffusing. one or more types of impurity into the surface from the emitter side. Emitter and collector junction and electrodes may then be provided by alloying into the surface, a further impurity characteristic of the opposite conductivity type. A zone of varying composition of materials with different energy gaps, such as silicon and germanium, may be produced by directional cooling of a melt comprising both materials, or by applying a melt of the material with the lowest melting point against a body of the other material (Si) and heating so that the silicon starts to melt at the interface. In order to achieve a desired rate of change of composition (e.g. a linear variation of energy gap to provide a constant field), germanium may be added to the remaining molten silicon. Each material may be separately doped such as by adding boron to the germanium and antimony to the silicon. These impurities have different segregation constants, and therefore a PN junction may be provided during the freezing process; if the difference in segregation coefficients is sufficient, a second PN junction may be achieved to provide a PNP or NPN unit. The semi-conductor material may consist of compounds of the type A III  B V . Specification 755,456 is referred to.
Patent GB-803434-A (GB)
Title: Improvements in or relating to machine tools
Inventor: FRASER NORMAN
IPC: B23B21/00
Filed: 1955-10-25
Abstract: 803,434. Lathe-details. FRASER & SONS, Ltd., D. Oct. 25, 1956 [Oct. 25, 1955], No. 30467/55. Class 83 (3). In a centre-lathe, a tool-holder is mounted directly above the work so as to allow a clear passage below the tool-holder for an automatic work-loading and unloading-mechanism. Toolholders 4, fed vertically or at an inclination, in a vertical plane normal to the axes of one or more pairs of coaxial centres 1, 2, allow work 3 to be fed from a loading-station 7 to the centres by a conveyer 5. The centres 2 are carried by a tailstock which is reciprocated axially towards and from the centres 1. After machining, the work passes to an unloading-station 8 where it is lifted and ejected by mechanism 9, and may pass to a shoot. In a modified construction, Fig. 5, the work 19 is hopper-fed by gravity to an arm 23<SP>1</SP> which positions it between the centres. After being machined, the work falls clear. Removing cuttings.-A shoot 10 beneath the conveyer 5 collects cuttings.
Patent GB-393179-A (GB)
Title: Improvements in or relating to toy shooting apparatus
IPC: F41B3/00
Filed: 1932-10-31
Abstract: 393,179. Toy pistol. GRAFF, E. H., 75, Stubelallee, Dresden, Germany. Oct.31, 1932, No. 30486. [Class 132 (iii).] In a toy pistol in which a disc is projected by the contraction of a stressed rubber band o when released from a notch N, various parts of the pistol are conjointly combined in a blank which also includes detachable projectile discs. The blank, Fig. 1, is slotted at hand w and has printed or marked thereon the dotted lines shown. It is bent about the median line m until edges 4, 4 meet, and the portions i, i arid x, y are bent inwards as shown dotted in Fig. 3 to form a channelled support i, m, Fig. 3, for a projectile disc p, which may rest against the faces h, and a notch N which holds tensioned a rubber band o passing through slots n. The lines 2 are perforated for easy removal of the projectiles p whch are fired by manually raising the band o over the edge w, Fig. 3. In another embodiment, the blank, Fig. 5, comprises a trigger piece e in addition. The blank is bent as before to form the support i, m, Fig. 6, for the projectiles, but the band o is released by retracting the trigger which pivots about its tongue f engaged in a slot g in the side a, the edge b acting as a stop to the trigger cam part t. The parts a may be held together by a tongue c and slot d. Two further embodiments, one with and one without a trigger release are described.
Patent GB-520493-A (GB)
Title: Improvements in or relating to the manufacture of artificial filaments, yarns, foilsand similar materials made of cellulose or cellulose derivatives
IPC: D06M11/75
Filed: 1938-10-24
Abstract: 520,493. Cellulose ester yarns, foils &c. DREYFUS, H. Oct. 24, 1938, No. 30680. [Class 2 (ii)] Yarns, foils, and similar materials made of cellulose or cellulose derivatives are subjected to esterification treatment with a medium comprising the anhydride of a polycarboxylic acid and carbonyl chloride or thiocarbonyl chloride. Products soluble or insoluble in organic solvents may be obtained. The products may have a raised safe ironing temperature and raised melting point. The reaction may be carried out with moderate heating or at 100-200‹C. Xylene or other solvent for the anhydride and carbonyl chloride may be used. Malonic, succinic, glutaric, adipic, citric, phthalic tetrachlorophthalic, or hexahydrophthalic anhydride may be used. Cellulose acetate, propionate, or butyrate, or ethyl or propyl cellulose materials or materials of natural or regenerated cellulose may be treated. There may be used yarns obtained by the saponification of cellulose acetate yarns. In an example, cellulose acetate woven fabric is treated with a solution of phthalic anhydride in xylene while carbonyl chloride is bubbled through the solution. In another example, adipic anhydride is dissolved in xylene and regenerated cellulose hanks are treated in the solution while carbonyl chloride is bubbled through.
Patent GB-1521793-A (GB)
Title: Pinching clips
IPC: F16B2/20
Filed: 1976-07-23
Abstract: 1521793 Clip NIFCO INC and NICHIEI BUSSAN CO Ltd 23 July 1976 [25 July 1975] 30757/76 Heading E2B A clip has arms 2a, 2b with a hinge 1 therebetween. The arm 2a has a plane portion 3a, an arcuate portion 4a and a latching member 7a and the arm 2b has a plane portion 3b, an arcuate portion 4b and a latching member 7b. The arms 2a, 2b are connected to a resilient biasing member 5 by hinges 6a, 6b. Retarding portions 8a, 8b extend from the arcuate portions 4a, 4b respectively. The clip may be made from synthetic plastics material.  In use the clip is moved from its open position, Fig. 2, through its closing position Fig. 3, to its closed position Fig. 4, the portions 8a, 8b effectively a retardation of the closing movement. The latching members 7a, 7b may be latched together. Opening of the clip is effected by forcing the portions 8a, 8b towards each other.
Patent GB-337926-A (GB)
Title: Improvements in or relating to the manufacture of plasters
IPC: C04B11/00
Filed: 1929-10-10
Abstract: 337,926. Lefebure, V. Oct. 10, 1929. Compositions containing plaster of Paris and anhydrite .-A plaster is prepared by mixing anhydrite with plaster of Paris or any standard plaster, e.g. Keenes cement. The anhydride may be " accelerated " anhydrite as disclosed in Specifications 236,695 and 317,672. By varying the relative proportions of the ingredients the setting time may be varied upwards from an almost instantaneous set, and tables are given showing this effect. In general the mixture has a shorter setting time than either of the ingredients, but by the use of a large quantity of untreated anhydrite, which per se displays no practical set, the setting time of standard hemihydrated calcium sulphate is retarded. In an example a wall plaster consists, by volume, of 1 part of hemihydrated standard plaster, with a set of about 60 minutes, with 9 parts of anhydrite containing 0.2 per cent of potassium sulphate and zinc sulphate in molecular proportions, having itself a set of about 5 hours. The mixture has a set of about 60 minutes. In another example, a casting or moulding plaster consists of 1 part by volume of a semi-hydrated plaster with 4 parts of anhydrite containing 2 per cent of potassium sulphate and zinc sulphate in molecular proportions. This has a quick set.
Patent GB-682966-A (GB)
Title: Improvements in the manufacture of carbon black
IPC: C09C1/50
Filed: 1949-11-30
Abstract: <PICT:0682966/III/1> Carbon black is produced by the incomplete combustion of a hydrocarbon-containing fuel in a furnace, additional heat being furnished by the introduction into the furnace of hot inert gases produced outside the furnace by the combustion in an oxidant richer in oxygen than air, of part of the effluent gases from the p  furnace which have been freed from carbon black.  In the Fig., a gaseous or liquid fuel and air, one or both of which may be preheated, are injected at 2 into a passage 1, the effluent passing successively through a spray cooler 5, a heat-exchanger 10, a carbon black precipitator 6 and a drier 7.  The hot dry effluent is separated at the pump 8, part going to a waste heat boiler 14 whilst part is recycled via pipe 9, heat-exchanger 10 and pipe 11 to a point 12 where it is burnt with an oxygen-rich gas or fuel oxygen, the combustion products being injected at 4 into the furnace to form a blanket of inert gas along the furnace wall.  This injection of hot inert gas is preferably tangential. Specification 621,031 is referred to.
Patent GB-1398047-A (GB)
Title: Rare earth metal final rinse for conversion coated metals
IPC: C23C22/83
Filed: 1973-06-28
Abstract: 1398047 Treating conversion-coated metals with rare-earth metal salts STAUFFER CHEMICAL CO 28 June 1973 [10 July 1972] 30785/73 Heading C7U A metal carrying a conversion coating is given increased corrosion resistance by rinsing with an aqueous solution of a rare-earth metal (i.e. elements of atomic number 39 and 57-71) salt having molarity #0.000001M and pH 2.0-6.5. The solution may contain, e.g. Ce<SP>3+</SP>, La, Sm or Pr in the form of halide, nitrate, acetate, sulphate, acetyl acetonate, gluconate or phytate; the acid of the anion may be present to adjust the pH. Iron, steel, Zn or Al may be so treated, having a conversion coating of phosphates (e.g. of Zn, Zn-Cd, Fe and/or Mn), phosphate-oxide, oxalate, arsenate or chromate. The conversion coating is provided by conventional techniques; the bath may contain nitrite or chlorate accelerators.
Patent GB-1197150-A (GB)
Title: Motor Vehicle Doors
Inventor: HALL LESLIE
IPC: B60J5/04
Filed: 1969-06-18
Abstract: 1,197,150. Motor vehicle doors. FORD MOTOR CO. Ltd. 18 June, 1969, No. 30803/69. Heading B7J. A motor vehicle door comprises an outer metal skin 1, an inner metal skin 2 and a pane of glass 3 movable from an extended position (shown in dotted lines) to a retracted position (shown in full lines), concealed within the door, in which retracted position the two skins 1 and 2 are on the same side of the pane of glass 3. On the other side of the pane of glass 3 is a trim panel 6 which, with the door in use, is inside the vehicle. The inner skin 2 is swaged to reinforce it and may have an integral edge member of substantially U-shaped cross-section, Fig. 4 (not shown), which serves as a mounting for both the trim panel 6 and the pane of glass 3 in its retracted position, alternatively the edge member may comprise a separate piece of metal welded to the inner skin 2 and/or the outer skin 1. As illustrated in Fig. 3 (not shown), mounting members (9, 10) on which a door handle, window regulator and door pull are fixed, are fitted to the edge member, the mounting members (9, 10) being on the opposite side of the pane of glass 3 to the skins 1, 2 when the glass 3 is in its retracted position.
Patent GB-812866-A (GB)
Title: Improved splined joint
IPC: F16D3/06
Filed: 1957-10-02
Abstract: 812,866. Shaft couplings: GENERAL MOTORS CORPORATION. Oct. 2, 1957 [Oct. 18, 1956], No. 30827/57. Class 80 (2). To ensure assembly of a splined joint between two elements 24, 40 of a divided propeller shaft on a vehicle in a single relative circumferential relation appropriate to its three universal joints 18, 16, 20, one splineway of either element, e.g. 40, is occupied by a key 52 which is accommodated by removal of one spline in the other element 24. The key 52 is one leg of a V- shaped spring clip having an inner leg received in the hollow end of the element 40 and welded at 50 thereto. The spline element 24 is carried in an intermediate bearing 22 having guards 34, 36 and a slinger 38 and retained by a screwed ring 30 enclosing a spline seal 48.
Patent GB-830391-A (GB)
Title: Improvements in or relating to cathodic sputtering of metal and dielectric films
Inventor: HOLLAND LESLIE ARTHUR
IPC: C23C14/04
Filed: 1955-10-28
Abstract: 830.391. Coating by vapour deposition. EDWARDS HIGH VACUUM Ltd. Oct. 22, 1956 [Oct. 28, 1955], No. 30944/55. Class 82(2) An apparatus for cathode sputtering a film of a given substance or substances on to a workpiece 7 comprises a vacuum chamber 1, a workpiece-supporting table 3 in said chamber adapted for rotation about a central perpendicular axis, a sector-shaped cathode or cathodes 5, 6 comprising said substance or substances respectively and supported in the vacuum chamber and spaced from said table along its axis of rotation, means for connecting the cathode(s) to a source of high potential, and means for effecting rotation of the table. The vacuum chamber may also contain a vapour source 11 for depositing films by evaporation. The term "cathode" is defined to include a pair of electrodes connected respectively to each pole of a single-phase A.C. source, and three electrodes connected respectively to the poles of a three-phase A.C. source. The enclosed angle # of the sector-shaped cathodes may vary from 10 to 180 degrees. Further, the cathodes may be shaped, e.g. to the forms 17 and 18 shown in Figs. 4a and 4b respectively. The following applications are disclosed: (a) the sputtering of iron oxide on to sun-glasses followed by the evaporation of magnesium fluoride or silicon monoxide, (b) the production of multi-layer interference filters incorporating alternate layers of reactively sputtered titanium oxide and evaporated magnesium fluoride, (c) the use of alternate layers of sputtered bismuth oxide and evaporated magnesium fluoride in interference filters and on the surfaces of imitation precious stones, and (d) the production of transparent conducting coatings on glass by reactively sputtering a metal oxide film from one cathode and then sputtering a gold film from another cathode. Reference is also made to the sputtering of nickel and reactive sputtering of cadmium oxide. Specification 610,529 is referred to.
Patent GB-1478794-A (GB)
Title: Process of manufacturing dichloroacetyl chloride
IPC: C07C51/00
Filed: 1975-07-24
Abstract: Dichloroacetyl chloride is prepared from trichloroethylene. The latter is reacted in the liquid phase with an oxygen-containing gas in the presence of catalytic amounts of chlorine or bromine and a chlorine activator to give a mixture of dichloroacetyl chloride and trichloroethylene oxide. Trichloroethylene oxide in the mixture is subjected to a rearrangement reaction in the presence of a primary or secondary alkyl amide having 1 to 6 carbon atoms in the alkyl radical as catalyst to give dichloroacetyl chloride. Dimethylformamide is preferably used.
Patent GB-309968-A (GB)
Abstract: 309,968. Richardsons, Westgarth, & Co., Ltd., and Burn, W. S. Dec. 19, 1927. Cylinders, arrangement of ports in.-In a port arrangement for a supercharged double - acting two - strokecycle emgine cylinder as shown in development in Fig. 5, and in which inlet ports 1, 2, 3 remain open after the piston has closed the normal inlet and exhaust ports b, a, automatic flap valves d, Fig. 4, are provided to prevent blow-back of the exhaust through the ports 1, 2, 3. The valves d are fixed at right angles on a common vertical shaft e supported in bearings f at the back of the ports and arranged so that when one valve is opened the other valve is closed. The ports b may be elongated to act as supercharging ports, valves d being provided for each. Specification 249,188 is referred to.
Patent GB-834947-A (GB)
Title: Apparatus for dispensing and mounting pins
Inventor: MAXIMOFF PAUL ANDREW
IPC: H05K13/04
Filed: 1957-10-03
Abstract: 834,947. Mounting pins in circuit boards; shearing. JUST, A., and JUST, M. R., [trading as MALCO TOOL & MANUFACTURING CO.]. Oct. 3, 1957, No. 30997/57. Classes 83 (2) and 83(4). A machine for dispensing and mounting a number of terminal pins or the like in a printed circuit board comprises a support for the board, means for feeding a flexible strip carrying a number of pins, means for bending the pins relative to the strip and then severing the pins from the strip and means for directing the severed pins in a preselected pattern to the board. The pins may be of the kind described in Specification 795,597, each comprising a cylindrical body 18 and tapered nose 17 to facilitate entry into a hole in a circuit board where it is located by a bead 19 and bosses 21. The pins are made from part of a metal strip by punching and rolling and remain attached to the other part of the strip which forms a flexible perforated belt 20 which may be stored on reels for feeding to the machine. In the form of machine shown in Fig. 1, two belts 20 are fed side by side by guide rollers 36, 37, 38, 39 and a reciprocating feed device 40 which has spring-pressed pawls 41 with ends adapted to enter the holes in the belts on the downward movement but to ride over them on the upward movement. The effective feed stroke is adjustable by masking plates 47. The devices 40 are reciprocated by a rack 59, pinions 58 and 55 and a rack 54 driven by a pneumatic cylinder 50. As the belts enter the machine their movement is restrained by a brake device 66 wherein the pins pass along recesses 68, Fig. 3, while the perforated carrying portion passes under brake shoes loaded by springs 71, the pressure being adjustable by rotating a threaded sleeve 73. Between the guide rollers 37 and 38 the belts pass beneath a punch operated by a piston and cylinder assembly 92 and comprising a platen guided by posts 95, Fig. 6, and carrying locating pins 102 and punches 103. As the platen descends, the locating pins pass through a guide plate 116 and through the perforations in the belts 20. Ram members 107 then bend the pins downwardly as shown in Fig. 7 and a shear plate 108 co-operates with a cutting edge of a die 110 to sever the pins from the strip. As the pins fall, they pass through shoots 114 into flexible guide tubes 136, a number of such tubes leading all the pins to the required. positions in a template 134 through which they pass into holes in the circuit board 12 beneath. The number of pins severed at a single stroke of the punch is controlled by altering length of belt fed by one reciprocation of the feeder 40 and the flexible tubes can be readily altered to direct the pins to different openings in the template. The circuit board may then be passed to another machine which presses the pins into position and, if desired, locks them in place by deforming the portions extending through the openings.
Patent GB-308166-A (GB)
Title: Improvements relating to filtering or like devices
IPC: B01D29/46
Filed: 1928-10-26
Abstract: 308,166. Thompson, H. A. Oct. 26, 1928. Addition to 307,267. Strainers comprising grids or gratings.-In a modification of the apparatus described in the parent Specificaition, comprising a pile of annular laminµ with scrapers extending between the laminµ mounted on a parallel spindle with gearing so that the laminµ and scrapers rotate or oscillate in unison during cleansing, the peripheries of the laminµ are toothed and gear with pinions on the scraper spindle. Figs. 1 and 2 show apparatus comprising two strainer chambers each having valved connections with an inlet passage 6 and an outlet passage 8. A pile of laminµ 10 is arranged between upper and lower plates 14 in which are mounted spindles 12, carrying scraper discs 11 which extend between the laminµ. The laminµ are toothed on their internal edges and gear with pinions 13, Fig. 3, which are placed between the scraper discs on the spindles 12. The pressure on the pile is determined by springs 16 which surround the spindles 12 between the upper plate 14 and collars 15 on the spindles. Pinions 21 on the spindles gear with a pinion 22 on a spindle 23 that can be turned by means of a wheel 25. Fixed scrapers 26 of C-section may be so placed as to engage the line of intersection of the laminµ and the scraper elements. Alignment of the laminµ may be facilitated by vertical rollers 30, which contact with their outer edges. With the arrangement shown, the liquid under treatment strains inwards between the laminµ and passes away through an aperture in the upper plate 14. For outward filtration, the scrapers are placed outside the element formed by the laminµ. which are toothed on their external periphery, and the fixed scrapers and vertical rollers are placed inside the element.
Patent GB-1480725-A (GB)
Title: Conveyors
IPC: B65G13/075
Filed: 1973-06-29
Abstract: 1480725 Roller conveyers DOUGLAS-ROWNSON Ltd 26 June 1974 [29 June 1973] 31114/73 Heading B8A The roller conveyer of the parent Specification is modified so that when a leading article on a roller unit is arrested, following articles on the unit or upstream units will close up. Alternatively, if individual articles are removed from a halted accumulation of articles, as soon as conveying is resumed, the gaps will automatically close up. In Fig. 1 the leading six conveying rollers 14 of a unit having twenty four rollers, (twelve only shown) are located above a pair of braking pads 20 secured to side plates 17 of the roller unit, Fig. 2. Air supply lines extend in parallel to devices 30 for lifting a number of roller units, each unit having a pair of the devices 30 controlled by a switch 47. When a row of articles A, B, C-(three only shown) is halted by a stop 50, switch 47 is operated by rightward movement of the roller unit which is lifted so that the leading rollers 14 are braked. The unit remains raised so that further articles on the unbraked rollers are able to close up due to drive from the next unit to the right. Similar accumulation occurs on other upstream units. Removal of the stop 50 initiates lowering of the illustrated roller unit and drive of the rollers by upper belt run 12 commences. Drive to the other roller units follows sequentially. A similar result occurs if articles A, B or C are removed, for example.