baber/WOPTO huggingface dataset:
Patent GB-1100846-A (GB)
Title: Method of increasing the inverse voltage of pn-junctions in semiconductor elements having bevelled surfaces
IPC: H01L29/06
Filed: 1965-04-26
Abstract: 1,100,846. Semi-conductor devices. SIEMENS-SCHUCKERTWERKE A.G. 26 April, 1965 [25 April, 1964], No. 17573/65. Heading HlK. In a semi-conductor device having a plane junction meeting the surface at an angle other than 90 degrees, the surface adjacent to the junction contacts a substance which produces a surface charge such that when the junction is reverse biased the maximum field strength at the surface is reduced. A diode produced by diffusing aluminium and gallium into an N-type silicon wafer, ultrasonically machining to produce a bevelled edge, and alloying-in contacts, is placed in a container which may be filled with moist nitrogen, dry nitrogen or ozone to produce a strong positive, weak positive or strong negative surface charge respectively. If the more lightly doped region is N-type and its bevelled surface makes an obtuse angle with the junction, the surface charge should be strongly negative, Fig. 3 (not shown). If the surface of this region makes an acute angle with the junction and has an N-type surface region near the junction, then the maximum field strength occurs near the N-type region and the surface charge should therefore be weakly positive to reduce the field at this point, Fig. 5 (not shown). As shown, Fig. 8, an SCR is produced by diffusing both aluminium and gallium into an N-type silicon wafer 83 to produce relatively heavily doped P-type regions 84 and 85. Aluminium wafer 86, gold-boron wafer 87 and gold-antimony ring 89 are alloyed to the surfaces to form the collector, gate and emitter contacts respectively. The edge of the wafer is bevelled and a gold-antimony ring 90 is alloyed to region 83. The device is mounted on a metal carrier disc 92. A ring of lacquer 93 producing a strong negative surface charge is applied to region 83 at the emergence of junction 81 and a ring of lacquer 94 producing a weak positive surface charge is applied to region 83 adjacent to N-type region 91. The substance used to produce the surface charges may be a silicone lacquer or a resin. Certain commercial products are mentioned, alizarin being added to some to modify the charge produced. Reference has been directed by the Comptroller to Specification 968,106.
Patent GB-687911-A (GB)
Title: Improvements in or relating to power driven lawn mowers
IPC: A01D34/47
Filed: 1951-07-25
Abstract: 687,911. Lawn-mowers. WEBB & CO., Ltd,. H. C., and TAYLOR, F. W. Nov. 27, 1951 [July 25,1951], No. 17589/51. Class 6(ii) A motor lawn-mower wherein the cutter cylinder 15 is permanently driven by the motor 10 has an additional gear train 39 (Fig. 3) shiftable bodily into mesh with the cutter-drive so that the wheels or roller 26 may also be driven. The cuttercylinder is mounted upon pivoted arms on the side plates 11 and is adjustable by screws 18 as is described in Specification 622,416. The cutter drive is by a chain 22 to a sprocket 21 on the cutter-shaft 19. A gearwheel 20, integral with the sprocket 21, can be engaged by a gear 46 forming part of the gear train 39. The train 39 is mounted on a plate 30 pivoted on the roller spindle 28 and includes a small gear 45 rigid with the gear 46 and constantly in mesh with a large pinion 29 on the axle 28. Slots 42 in the side plates 11 permit the assembly 39 to be swung about the axle 28 into and out of engagement with the cutter-drive, the plate 30 having a handle 31 with a stud 32 which engages slots 33 in the side frames to retain the assembly in its alternative positions. The chain 22 is tensioned by a jockey pulley 23. The roller 26 may be driven from the spindle 28 by pawl and rachet mechanism.
Patent GB-444725-A (GB)
Title: Improvements in cartons and other containers composed of sheet metal or other material
IPC: B65D1/26
Filed: 1935-06-19
Abstract: 444,725. Making hollow waxe. FRANGHIA, B., 73, Rue Charles Laffitte, Neuillysur-Seine, France. June 19, 1935, No. 17655. [Class 83 (ii)] [See also Group XVII] A container is made by cupping a single piece of thin metal or other sheet and forming overlapped box pleats 3, 4, 5 in the wall and in the rolled-over rim 6. In modifications, the pleat may be formed at the corners only as in Fig. 12. The top edge is rolled over at 6, subsequently to the forming of the container. A machine for forming containers is described in Specification 444,711.
Patent GB-784578-A (GB)
Title: Improvements in apparatus for the distribution of thick grease under pressure
IPC: F04B19/02
Filed: 1954-12-20
Abstract: 784,578. Lubricant pumps. SOC. AUTOLUBE. Dec. 20, 1954 [Nov. 9, 1954], No. 17749/56. Divided out of 784,577. Class 102(1). Thick grease in a container 2 is pumped through a hollow piston 17 which enters a cylinder 13. The piston 17 is engaged by a sleeve 15, through a friction band 16, which engages the end of the cylinder 13 on the down stroke and is withdrawn by the piston on the upstroke.
Patent GB-680055-A (GB)
Title: Selector valve
IPC: F15B13/04
Filed: 1950-07-17
Abstract: 680,055. Valves. MUELLER, O. July 17, 1950 [Dec. 22, 1949], No. 17788/50. Class 135. A hydraulic selector valve comprises a body 10 with an outlet 18, a high-pressure inlet 20 and a low-pressure inlet 22 and a valve member 28 for connecting either inlet to the outlet. A spring 30 urges the member to the position shown in which inlet 22 is connected to the outlet and an annular surface 68 and a shoulder 60 on the member 28 engage the end 52 of a sleeve 26 to cut off communication between inlet 20 and the outlet. To connect inlet 20 to the outlet, the low-pressure source is disconnected from inlet 22 and applied through a line 32 to move the member 28 so that annular surface 62 enters a sleeve 24 and shoulder 58 engages the end of the sleeve, thus closing communication between inlet 22 and outlet 18. To return the valve member to the former position, line 32 is opened to exhaust and the high-pressure source is cut off from inlet 20. The high-pressure remaining in the outlet acts on a differential piston valve 94, seated in the member 28, and moves the valve to the right, thus connecting the outlet through bore 118, grooves 101 in the valve and a port 120 to the line 32. The high pressure is thus gradually dissipated, permitting the spring 30 to move the member slowly to the right. In a modification, the spring 30 is replaced by a loading pressure lower than the pressure applied to the line 32, and the valve 94 is replaced by a piston valve urged to a position relieving the high-pressure by said loading pressure and moved to closed position by the pressure in the line 32.
Patent GB-493833-A (GB)
Title: Improvements in and relating to beam grids for roof or floor constructions
IPC: E04B7/10
Filed: 1938-06-15
Abstract: 493,833. Floors; roofs. MAIER, E. June 15, 1938, No. 17811. Convention date, Jan. 14. [Class 20 (iv)] A beam grid for floor and roof constructions comprises two series of intersecting beams e, f extending diagonally to the boundary, the length of the second shortest grid beam being three times that of the shortest grid beam. The beams do not extend from the corners of the boundary and are arched or cranked alternately upwardly and downwardly at beam intersection points, i, k located on lines parallel to a boundary edge as shown in Fig. 3.
Patent GB-457320-A (GB)
Title: Improvements in and relating to filtering apparatus
IPC: B01D33/056
Filed: 1936-06-26
Abstract: 457,320. Filters. AKTIEBOLAGET KEMISKA PATENTER, Magasinsgatan, Landskrona, Sweden. June 26, 1936, No. 17842. Convention date, June 26, 1935. [Class 46] In a travelling-band filter of the kind described in Specification 418,075 comprising a band 6 of cloth or other filtering material, supported on a porous or perforated elastic band 1 with raised edges 2 and an intermediate perforated or porous band 3 and which is led over one or more suction boxes through which the separated liquid is withdrawn, the raised portions of the edges 2 are made of a depth equal to the thickness of the band 3 so that together they form a flat surface for the support of the band 6. The edges 2 have grooves 4 in which the band 6 is held by blocks or wedges 7. The band 3 is formed with ribs, bars or buttons 8 on its lower surface. Inclined guide surfaces 9 cause the band to take a trough-like form as it passes over the suction box or boxes.
Patent GB-811980-A (GB)
Title: Improvements relating to servo-operated steering means for motor vehicles
IPC: B62D5/06
Filed: 1957-06-05
Abstract: 811,980. Vehicle power steering. DAIMLER-BENZ A. G. June 5, 1957 [June 7, 1956], No. 17932/57. Class 79(5) In a servo operated steering means for a motor vehicle a ball nut 11, Fig. 1, on a steering column 2 as connected by an arm 24, Fig. 2, with a servo slide-valve 28 so that the valve is operated by rotation of the nut due to small deflections of the steering wheel. In one example the nut 11 is rotatably mounted by a ball thrust bearing 13 within the servo piston 16 which slides in the servo cylinder casing 1. The bearing 13 is located by a ring 21 and nut 22, the ring 21 sliding over a tubular extension 3<SP>1</SP> of a cylinder head 3 to provide a central guide for the piston 16. Connection between the piston 16 and steering arm 20 comprises a lever 19 integral with the arm 20 and coupled by a spring-loaded ball joint 18 to the piston 16. The valve 28 comprises a cylindrical slide 26 having an annular groove 27 engaged by a ball 25 on the end of the arm 24. The slide 26 is normally held central by a spring 33 mounted between discs 31, 32 rotatable on bearings 29, 30 to permit the slide 26 to rotate. Ports 40, 41 within the valve body are connected to opposite ends of the servo piston 16 and the different pressures in these ports resulting from movement of the slide 26 are transmitted through internal passages 34, 35 to opposite plungers 42, 43 to provide hydraulic feel. Modified valves 28 may be used with nuts having left-hand threads.
Patent GB-719839-A (GB)
Title: Improvements in or relating to fingers for the cutting mechanism of mowing and reaping machines
IPC: A01D34/18
Filed: 1952-07-16
Abstract: A finger for the cutting mechanism of a mowing machine as disclosed in the parent Specification in which the finger is made from one integral piece of steel is characterized in that the parts immediately behind the hardened cutting edges are partially hardened over a pre-determined depth, preferably by an induction hardening process, to provide a gradual change over between the hardened cutting edge and the body of the finger.
Patent GB-1191383-A (GB)
Title: Dry Cell.
IPC: H01M50/50
Filed: 1968-04-16
Abstract: 1,191,383. Dry cell. MATSUSHITA ELECTRIC INDUSTRIAL CO. Ltd. 16 April, 1968 [6 May, 1967 (3)], No. 17956/68. Heading H1B. A dry cell comprises a zinc anode case, a cathodic mixture inside the case, a separator between the case and the mixture comprising sintered thermoplastic resin particles and an electrolyte gelled by paste powder (i.e. a watersoluble gelling agent) in the separator. In a particular embodiment, zinc can 1 is heated and filled with a mixture of methyl cellulose as paste powder, polyvinyl alcohol, pulp powder, ethylene-vinyl acetate copolymer and silica powder, some of the mixture sticking to the inside of the can and sintering together and the remainder being poured out again. The thermoplastic may be in fibres 0À1 to 0À5 mm. in length and may comprise 20-50% of the mixture, the silica comprising 0À1-3% and having a particle size of 5 to 50 mÁ. The pulp powder may also be fibrous. The separator 2, so formed may be 0À2 mm. or more thick. The electrolyte comprising ammonium chloride, zinc chloride and water is then added to the cell followed by cathodic mixture 3 of manganese dioxide, acetylene black and ammonium chloride moulded to a cylindrical shape with carbon rod 4 at the centre and coated on the outside with sodium alginate. On contact with the electrolyte the coating is converted to ion-permeable membrane 5 of zinc alginate. The top of the cell is covered by a sheet of paper 7 and hot pitch sealing compound 7 poured in. The outer case 15 is of metal lined with kraft paper 14. In other embodiments the paste powder may be natural rubber, processed starch or a synthetic material, the separator mixture may include 5-12% of a polyethylene glycol of M.W. 4000-6000 or butyl rubber, the separator formed as above may be rendered substantially free from pin-holes and of substantially uniform thickness by compressing it, optionally with heating, or by wetting it to swell the paste powder before drying it again. Instead of being formed as above the separator may be formed as a self-supporting film and used to wrap the cathodic mixture or line the zinc can, the cathodic mixture may contain graphite, the cathodic mixture may be added damp to the cell and the carbon rod pushed into it and the ion-permeable membrane may be of acetyl cellulose.
Patent GB-326422-A (GB)
Title: Improvements in or relating to fasteners for power transmission belts
IPC: F16G3/00
Filed: 1929-06-12
Abstract: 326,422. Noirit, A. June 12, 1929. Belt fastenings. - In belt fastenings of the pivoted type, a plate 1 is secured to each belt end and is bent upon itself to form a loop 3 to receive the looped wire interconnecting-link 2, one end 4 being passed through a slot 6 in the plate and both ends 4, 5 passing through slits in the belt and being clinched upon its lower side. Additional tongues for passing through the belt may be formed both in the inner and outer layers of the plate.
Patent GB-962446-A (GB)
Title: Apparatus to form piles of flat, fragile objects for subsequent packing
IPC: B65B23/14
Filed: 1961-05-19
Abstract: 962,446. Packaging machines. OTTO HANSEL G.m.b.H. May 19, 1961 [Nov. 10, 1960], No. 18259/61. Heading B8C. Apparatus for forming piles of flat, fragile objects for packing, comprises a conveyer provided with fingers for extracting the objects from feeding shoots arranged along the conveyer, and a supply unit for stiffening shims of cardboard or similar material mounted on the upstream side of the shoots. The objects, which may be biscuits 13<SP>1</SP>, are stacked as shown on a cardboard shim 16 and may be enclosed in a wrapper. The machine is similar to that described in Specification 828,618 but has a shoot 15 containing the shims 16. The shims are pushed by a reciprocating pusher 22 down an inclined guide 18 to be positioned between fingers 3 on the conveyer 2. The shims are carried by the fingers 3 along plastics slide bars 4 below the shoots A-D arranged as in the above Specification and receive piles of objects. The piles are spaced apart as shown to the right of Fig. 3 but as they are moved to the left they are urged into abutting relationship by means of a plate 30. The plate is reciprocated transversely to the direction of motion of the conveyer 2 and simultaneously moved longitudinally with the conveyer. The ends of the cardboard shim are then folded up as shown in Fig. 7, and the assembly wrapped by means not shown.
Patent GB-649386-A (GB)
Title: Improvements in and relating to the packing of kippers
IPC: B65D81/18
Filed: 1948-07-07
Abstract: 649,386. Packing kippers. BANKS, A., and EDDIE, G. C. July 7, 1948, No. 18270. [Class 94(i)] [Also in Group XIII]  A frozen multi-layer pack of kippers is produced by arranging the kippers in each layer in an orderly fashion in two rows laterally overlapping with the thin or boneless side of one kipper overlapping the thick or bone side of the adjacent kipper, and with the heads of the kippers in the two rows pointing away from each other and the tails overlapping at the centre line of the two rows, placing an additional kipper at each corner of the pack between adjacent layers with its head pointing in the same direction as the kippers in the adjacent row and its thick or bone side lying on the outside of the pack, and subjecting the completed pack to a freezing process. The kippers are so packed in a paper-lined tray which, when filled, is covered by a lid holding the kippers under slight pressure, and subjected to a quickfreezing process. The paper lining may remain as a wrapper for thecoherent frozen block so formed. According to the Provisional Specification fresh kippers may be packed as above in the tray to form a completed package without freezing taking place.
Patent GB-634862-A (GB)
Title: Improvements in apparatus for cleaning or polishing sheet metal
IPC: B24B7/13
Filed: 1947-07-10
Abstract: 634,862. Branning machines. AETNA-STANDARD ENGINEERING CO. July 10, 1947, No. 18280. Convention date, Nov. 22, 1939. [Class 82(ii)] [Also in Group XXIII] In a branriing machine for cleaning or polishing sheet metal-e.g. tinplate-in which the sheet or strip metal is moved lengthwise vertically between a plurality of pairs of rolls and in which bran or polishing powder is discharged against a pair of the rolls, means are provided for rotating one roll of each of said pairs in a direction such as to oppose the vertical movement of the sheet and for rotating the other roll of each of said pairs in the direction of movement of the sheet. In the arrangement shown, metal strip 5 is fed between pairs of rolls the rolls of the first and last of which rotate with the direction of movement of the strip. Of the intermediate pairs, rolls 27, 24, 23, 20 rotate so as to oppose the strip movement whilst rolls 26, 25, 22, 21 rotate with the strip movement. Bran, fed at the top of the container 10 by screw conveyers 32, 33, is directed against successive pairs of rolls by baffles 30, 31, 34, 35; is received by screw conveyers 59, 60 and elevated by screw conveyers in the tubes 69, 70 to a distributer in the tube 89 from which it is discharged to the centres of the conveyers 32, 33 each of which has a right-hand and a left-hand screw thread extending from its centre in order to distribute the bran evenly over the roll lengths. Preferably the rolls 20 ... 27 opposing the strip motion are driven at a slower speed than those (21 ... 26) which rotate with the strip.
Patent GB-697824-A (GB)
Title: Improvements in and relating to centrifugal separators
IPC: B04B11/04
Filed: 1951-08-02
Abstract: 697,824. Centrifugal separators. BAKER PERKINS, Ltd. Aug. 2, 1951 [Aug. 11, 1950], No. 18335/51. Class 23  A strainer separator  for separating mother liquid from sugar comprises rotatable basket 50, a stripper 54 rotatable with and reciprocatable relative to the basket, a curb ring 70, and means detachably connecting the curb ring and the stripper. During separation the curb ring seats on the rim of the basket, and is carried by rods 94 on an imperforate bowl 80 axially slidably along the basket. Latches 96 pivoted on the bottom of the bowl project through the basket to engage the underside of the stripper. The latches co-operate with cam surfaces 108, 112 on the basket and stripper respectively, the arrangement permitting the stripper to raise the curb ring to the position shown in Fig. 3 during the first part of its upward movement and to lock the curb ring against the basket rim when in its inoperative positionat the bottom of the basket. The stripper is carried by a piston 56 extending into a hollow shaft 48 forming the cylinder and supporting the basket. The basket support shaft is driven by a motor 26 adjustably mounted on a slide 30. The shaft rotates in bearings 44, 46 carried by a support 42 secured to a base 10 by resilient bearings 40. Mother liquid centrifuged from the basket to the bowl is collected in a housing 142. The housing is raised hydraulically so that washing liquid centrifuged from the basket to the bowl is collected in a housing 141. Sugar crystals stripped from the wall of the basket pass between the rods 94 to impinge on a resilient curtain 120 and fall to the rotating bottom of a housing 114 to be discharged through an opening 134 by a plough. Specification 653,126 is referred to.
Patent GB-849596-A (GB)
Title: Improvements in or relating to empty and load vacuum brakes
Inventor: BROWALL BERT HENRY
IPC: B60T13/46
Filed: 1958-06-09
Abstract: 849,596. Vacuum brakes. SVENSKA AKTIEBOLAGET BROMSREGULATOR. June 9, 1958, No. 18368/58. Class 103 (1). In an empty and load vacuum brake apparatus for a railway vehicle of the kind comprising an empty brake cylinder 2, a load brake cylinder 3, a train pipe 1 to which the brake cylinders are connected, and a changeover valve 6 for shutting off or opening the connection between the train pipe or, when a direct admission valve 5 is used, the latter and the load brake cylinder, the changeover valve 6 has the form of a lift valve 8 operatively connected with a lost motion action 25, 26 to a vacuum servo motor formed by diaphragm 17 and clamping plates 18 supplied from the brake system through a valve 27 under the control of a force derived from and varying with the weight of the vehicle. The vacuum servo motor takes one or the other of two end positions adjacent abutment shoulders 19, 20 according as the load of the vehicle is below or above a predetermined value or load range, the lift valve 8 being free to act as a check valve preventing flow of air to the load brake cylinder via passage 12 leading to hose 14 when the vacuum servo motor is in one end position abutting shoulder 20 and when the vacuum servo motor is in the other end position abutting shoulder 19 the lift valve is positively lifted from its seat to permit flow of air from passage 13 to the load brake cylinder via passage 12 on reduction of the vacuum in the train pipe. Specification 795,769 is referred to.