baber/WOPTO huggingface dataset:
Patent GB-809642-A (GB)
Title: Improvements in semiconductor devices and methods of making them
IPC: H01L21/22
Filed: 1956-03-13
Abstract: 809,642. Coating by vapour deposition. WESTERN ELECTRIC CO. Inc. March 13, 1956 [March 23, 1955], No. 7811/56. Class 82(2) [Also in Group XXXVI] A junction or field transistor is manufactured by vapour-diffusing an impurity into the surface of a semi-conductor wafer, and converting a portion of the diffused surface zone into the opposite conductivity type, the remainder of the surface zone forming the base electrode in a junction transistor, or the source and drain electrodes in a field effect transistor. The surface of a Ga doped P type 5 ohm cm Ge single crystal wafer 10 is freed from impurities such as Cu by soaking in KCN as described in Specification 750,640 and the wafer washed in de-ionized water and dried. As is then diffused into the surface from the vapour phase to form an N type layer 11 either by heating the wafer in the presence of a Ge body heavily doped with As as in Specification 809,641 [Group XXXVI] or by heating the wafer to a high temperature in As vapour produced by heating a body of As at a much lower temperature. In both cases the vapour pressure of the As is below the equilibrium vapour pressure for the temperature to which the Ge is heated. Al 12 is evaporated on to a circular area of the wafer upper surface and the wafer heated on a stripheater to the Al-Ge eutectic temperature 424‹C. in hydrogen until wetting commences when the temperature is momentarily raised to 700‹C. to form a PN emitter junction. The heating and evaporation may alternatively be carried out simultaneously. An annular base electrode 14 is provided by evaporating an Sb-Au or Sn-Sb alloy film around the emitter and heating to alloy it to the As doped layer. An ohmic collector connection is made to the core of the wafer through the As doped layer by alloying an acceptor doped solder 16 e.g. Au-Ga, or In on a Pt supporting slab 17 to its back face in the same or a separate heating. The emitter face is then masked and the surface etched to reveal the collector junction, and the assembly provided with wire connections and encapsulated. In the above embodiments Sb, P or Bi may be used in place of As to form the diffused base zone and In for the emitter or gate electrode. As a further alternative the emitter zone may be formed by ionic bombardment as described in Specification 715,268 [Group XXXVI] or by diffusing B formed by decomposition of BCl 4  vapour into the As doped layer. Si, Ge-Si alloys or A 111  By compounds e.g. InSb, AlAs may be used instead of Ge and corresponding NPN and NPIN devices made by starting with an N type or intrinsic body, using A1 or B as the diffusant and using As, P or Bi for forming the emitter and in the NPIN device the collector junction also. Specification 755,456 [Group XXXVI] also is referred to.
Patent GB-912954-A (GB)
Title: Improvements in or relating to rock drilling tools
IPC: E21B17/00
Filed: 1960-03-04
Abstract: 912,954. Percussive drills. SCHOELLERBLECKMANN STAHLWERKE A.G. March 4, 1960 [March 7, 1959; June 25, 1959], No. 7834/60. Class 124. Rock drill steels and rods are made from hardened stainless steels which may be carburized or nitrided.
Patent GB-435599-A (GB)
Title: Improvements in or relating to doors
IPC: E05D15/50
Filed: 1935-03-13
Abstract: 435,599. Locking doors of refrigerators &c. NAAMLOOZE VENNOOTSCHAP MACHINERIEEN-EN APPARATEN FABRIEKEN MEAF, 30, Croeselaan, Utrecht, Holland. March 13, 1935, No. 7842. Convention date, Jan. 30. [Class 44] A door for a refrigerator &c. is arranged to pivot about either edge, the pivotal edge being locked against displacement from its mounting during the movement of the door by movable members which, upon actuation, directly effect both the release of one edge and the locking of the other edge. In one form the door pivots about either of two pairs of bolts 11 engaged by arms 7, 8 pivoted at 9 and adapted to be rocked by a handle 1 through linkwork 2, 4, 6, so that when either pair of bolts are withdrawn from the door frame, the other pair are locked against displacement. When the right-hand bolts are moved to releasing position, a pivoted segment 12 at the right side of the door is turned by the lower bolt by means of a pin 14, so that a slot 15 is displaced out of register with a pin 16 on the arm 7, thus preventing movement of the latter. Other means of rocking the arms 7, 8 are described.
Patent GB-1039953-A (GB)
Title: Student test sheets
Inventor: HEWLETT ARTHUR JAMES
IPC: G09B3/08
Filed: 1965-02-23
Abstract: 1,039,953. Educational appliances; record sheets. ACME VISIBLE RECORDS Inc. Feb. 23, 1965, No. 7849/65. Headings G4M and G5G. A test answer sheet for electromechanical scoring comprises a sheet of paper having a triangular slot 20 to receive a pin 26 and a rectangular slot 22 to receive a rectangular pin 28 to enable the sheet to be accurately aligned with sensing fingers which contact half blocks 12a, 12b. If a student fills in the space between two blocks with pencil this causes a sharp drop in the electrical resistance across the half blocks 12a, 12b which are formed from conductive ink. When the sheet is printed the half blocks are lined up with reference lines Y and X.
Patent GB-127082-A (GB)
Title: Improvements in Shock Absorbing Mechanism for Motor Vehicles.
Inventor: COLEMAN STEPHEN LEONARD CHAUNC
IPC: B60G11/00
Filed: 1918-05-11
Abstract: 127,082. Coleman, S. L. C. May 11, 1918. Connexions; pneumatic springs; cataracts. - The power-shaft and shaft-casing of a motor vehicle is made telescopic and provided with a spring which resists longitudinal shock equally in both directions, a second spring being provided to offset the forward thrust of the driving axle. Means for automatically circulating lubricant are provided. Fig. 3 shows the device in section. The power-shaft comprises two relatively sliding parts 10, 11 turning in bearings 16, 17 on the telescopic parts 12, 13 of the casing. Ball bearings 27 also are provided between the rear ends of the parts 10 and 12. An extension 11' of the shaft 11 and the interior surface of the part 10 are made angular in cross-section and are separated by a roller-bearing cage 21 which transmits turning movements but permits longitudinal movement. The cage is kept in its correct relative position by racks 28, 29 secured respectively to the parts 11<1>, 10 and gearing with a pinion 29<1> connected to the cage by an arm 30. S'ecured to the part 12 of the casing is a cylinder 31 closed at its rear end by a plate 33 which has a sliding fit on a sleeve 45 capable of sliding on the part 13 of the casing. The sleeve 45 carries a piston 37 working in the cylinder 31, and a similar piston 36 at the other end of the cylinder slides over the part 12 and is secured to an inner cylinder 47 having its rear end closed by a plate 48 capable of sliding on the part 13 of the casing. A piston 49 in the cylinder 47 is secured to the part 13. The three pistons 36, 37, 49 are fitted with similar plate-valves, as shown, allowing air to pass freely towards the ends of the cylinders through holes in the pistons, but preventing it from returning. Two springs 38, 50 are arranged in the cylinders. Should the part 13 move inwards under shock or variation of driving-effort, a stop 56 encounters the end 46 of the sleeve 45 so as to move the piston 37 and compress the spring 38. Simultaneously, the piston 49 is moved and compresses the spring 50. Movement of the part 13 to the rear causes the piston 49 to encounter the end of the cylinder 47 and move the piston 36, thereby compressing the spring 38. The action of the valves in the pistons is to check return movements, the return passage of air trapped in the ends of the cylinder 31 being provided for by passages 64, 65, 70, controlled by a needle-valve 74.
Patent GB-169190-A (GB)
Title: Improvements in the manufacture of viscose silk
IPC: D01F2/06
Filed: 1920-03-17
Abstract: The manufacture of fine threads from viscose according to the drawing-out processes described in Specifications 163,817 and 166,981 is varied in the case of viscose of advanced ripeness by employing as the precipitating bath a saturated solution of sodium sulphate maintained at 45 DEG  C. and containing from 25 to 120 parts of sulphuric acid per litre.  The threads of 1-2 denier are insoluble in water and are directly washable; but those of higher denier numbers must be fixed in a bath of dilute sulphuric acid.
Patent GB-1367395-A (GB)
Title: Attachment for yarn spoolers for automatically forming a fisherman knot or the like
IPC: B65H69/04
Filed: 1972-02-22
Abstract: 1367395 Knotters DITTA MES-DAN DI MESSA PIETRO 22 Feb 1972 [25 March 1971] 8003/72 Heading D1C In a knotting attachment for a yarn spooler for joining two threads by a fisherman's knot, the cam mechanism 14 for actuating the yarnspreading levers 10 is substantially enclosed by a housing 8 through which shafts project to carry levers 10, the yarn ends being blocked by a rod 15 co-operating with a fixed angle plate 19 and reciprocable lengthwise by a cam 27 and lever 20 incorporated with the cam mechanism. Rod 15 has slots 17 sliding on screws 16 and projects from housing 8 with a bevelled end 19 to co-operate with plate 19. Scissors pincer elements 9 tie the two parts of the knot and sever the ends.
Patent GB-756209-A (GB)
Title: Door checks
Inventor: HERBERT KENNETH
IPC: E05F3/06
Filed: 1954-03-19
Abstract: 756,209. Door-operating appliances. TONKS (BIRMINGHAM), Ltd. Feb. 14, 1955 [March 19, 1954], No. 8046/54. Class 65 (1). The torsion spring of a door-closer is attached at one end to a disc 16 closing the housing 7, and the disc is provided with two sets of abutment means for selective engagement with means on the housing 7 and the actuating arm 15 respectively, to enable the initial stress in the spring to be adjusted. In the arrangement shown, three undercut recesses 18 in the disc are adapted to receive the base of an abutment 19 arranged to engage with a pawl 20 pivoted on the housing and backed by a stop-pin 20b, and three radial ribs 21 on the disc are arranged to engage with a pawl 22 pivoted on the arm 15. The abutments 19, 20 are effective when the arm moves anticlockwise, winding up the spring from the bottom (the pawl 22 then being removed), and 21, 22 are effective for stressing the spring by moving the arm clockwise. In modifications, the pawl 20 may be replaced by a fixed arm and the abutment 19 by a pin insertable in any of several holes in the disc, and the pawl 22 may be replaced by a pin fixed to the arm and the ribs 21 by a set of flat-sided bosses.
Patent GB-662074-A (GB)
Title: A device for feeding eyelets to an eyeleting machine or combined punching and eyeleting machine
IPC: A43D100/02
Filed: 1949-03-24
Abstract: 662,074. Eyeleting. CROWTHER, S. H., and CROWGROOVE, Ltd. March 24, 1950 [March 24, 1949], No. 8063/49. Class 43. An eyelet-feeding device for an eyeleting or combined punching and eyeleting machine comprises a cylindrical receptacle B having a rotary floor C which rises towards the centre and has a circular horizontal track D round its periphery bounded by a fixed wall E provided with an eyelet-delivery passage F, means e.g. an abutment E' being provided for deflecting the eyelets into said passage, which leads to an outlet G, where a spring-loaded member, e.g. a spring-loaded ball H, holds an eyelet J in position for entry by a pin K of the machine and is subsequently displaced as the pin moves the eyelet to its clenching position. The receptacle B, fixed to the underside of a table A at the front of the machine with its wall E fitting into a recess therein, has a depending tubular boss M; a boss C<SP>1</SP> depending from the floor C is received in the boss M and has fixed in it a shaft N driven by the machine. The passage F is formed in a fitting attached to the receptacle B and is so shaped that only eyelets resting on their flanges can enter it. A sliding transparent cover Q fits in a recess on top of the table.
Patent GB-577399-A (GB)
Title: Improvements relating to a cooking grill
IPC: A47J37/06
Filed: 1944-04-29
Abstract: 577,399. Cooking grills. KNOWLES, F. W. April 29, 1944, No. 8U82. [Class 126] [Also in Group VI] A cooking grill comprises an open frame in which diamond shaped bars B are fixed or detachably mounted, e.g., in side plates A, the bars B being located with their acute angles at top and bottom. The frame may rest on portions of an existing grill or range and may have legs or distance pieces to space it suitably above the top of an open fire C.
Patent GB-442813-A (GB)
Title: Improvements relating to marking extruded lead pipe
IPC: B44B5/00
Filed: 1935-03-15
Abstract: 442,813. Squirting and embossing tubes. HALL (BATTERSEA), Ltd., W., 277, York Road, Battersea, CORNELIUS, H. W., 56, Robinson Road, Colliers Wood, and CROFT, E. C., 32, Upper Park Fields, Putney, all in London. March 15, 1935, No. 8110. [Classes 83 (ii) and 83 (iv)] An extruded lead pipe e<1> is marked by a wheel g having characters on its periphery and journalled substantially radially within the die-holder f<1>, f<2>, and above the die d. The adjusting means for the radial slide h carrying the roll g comprise an externally screw-threaded sleeve i bearing thereagainst, and a screw j passing through the sleeve i and engaging a screwed aperture in the slide h.
Patent GB-961461-A (GB)
Title: Foam generators
IPC: A62C99/00
Filed: 1962-03-02
Abstract: 961,461. Aerating liquids; making foam. IMPERIAL CHEMICAL INDUSTRIES OF AUSTRALIA & NEW ZEALAND Ltd. March 2, 1962 [June 23, 1961; July 6, 1961], No. 8158/62. Heading B1C. A foam generator comprises a casing having axially opposed inlet and outlet passages, the outlet passage being of greater cross-section than the inlet, and an assembly of synthetic resin gauze formed into a single structure and having a plurality of transverse dished members. Fig. 2 shows a casing 10 having an internal structure of polyethylene terephthalate gauze comprising discs 16, 19 and dished members 18 sewn to a tube 17. Gas is introduced at 14 and foam forcing liquid at 15, foam being delivered at 13. In another embodiment, Fig. 3, in which the inlet and outlet passages are not depicted, and outer tube 30 and inner tube 31 are sewn together at 32, while the inner tube is gathered and sewn at 33 to form a succession of cones. The outside of the tube 30 is impregnated to make it impervious to foam, gas and foam-forming liquid being supplied in one end 34 and foam delivered at the other end 35.
Patent GB-1363964-A (GB)
Title: Method of and apparatus for separating an untwisted bundle of yarns into individual yarns
IPC: B65H51/005
Filed: 1972-02-22
Abstract: 1363964 Yarn separating KAWAI MAYER CO Ltd 22 Feb 1972 [22 Feb 1971] 8179/72 Heading D1J In a yarn separating device yarn guides laying the yarns onto bobbins and a yarn separator are reciprocated in unison. As shown, Fig. 2, yarns 16 are separated by separator 9, the individual yarns being fed to bobbins 14 via guides 10, both the bobbin holders and the guides being equi-spaced around the circumference of a circle. The guides and separator are reciprocated, Fig. 3, by pinion 8 via rack 11. Limit switches 13, 13' control electromagnetic clutches 6, 6<SP>1</SP>, Fig. 4, to control the direction of rotation imparted to pinion 8 by shaft 2.
Patent GB-233842-A (GB)
Title: A new or improved method of freeing coal wash water of suspended solids
IPC: B03D3/06
Filed: 1924-04-01
Abstract: 233,842. Burrows, R. A., Sinnatt, F. S., Slater, L., and Simpkin, N. April 1, 1924. Purifying liquids.-The finely divided material held in suspension in the water used for washing coal is separated therefrom by the addition of a coagulant or flocculating agent, without undue agitation, and allowing the mixture to settle with as little motion as possible. The reagent is preferably added to the water just prior to its entering the settling tank. One or more of the following may be used :-lime, caustic soda or other hydroxides of alkalies or alkaline earths, aluminium sulphate, sodium aluminate, magnesium chloride, sodium silicate, silicic acid, silica sol, casein, glue, gelatine, sodium stearate, or albumen.
Patent GB-661418-A (GB)
Title: Improvements in or relating to two part electrical connectors
IPC: H01R13/20
Filed: 1949-03-25
Abstract: 661,418. Cups for discharge tubes; two-part couplings. UNITED - CARR FASTENER CORPORATION. March 25, 1949 [March 27, 1948], No. 8245/49. Class 38 (i). A connector comprises a socket unit 3, formed from a cup 8 having walls 9 with turned-over lips to retain at the socket mouth an annular plate 7, and a plug unit 5 consisting of a pressstud contact 14 which engages the socket with a snap-fastener action. The socket unit is fused preferably into the glass wall 2 of a kinescope 1 and the tube 16 of the plug unit carries at one end a connecting-ring 15 which is clamped around the head 18 of the press-stud contact, a plug lead 27 being passed through an aperture 26 in a depression 25 in the head and soldered to the contact at 28. The contact prongs 19 are bent outwardly at 22 to provide a cam surface to snap into and engage with the socket plate 7. An insulating sheath 17 is mounted over the lead and the tube 16 to protect the user from shock.
Patent GB-526437-A (GB)
Title: Improvements in or relating to modulated high frequency transmitters
IPC: H04N5/40
Filed: 1939-03-16
Abstract: 526,437. Valve modulating circuits. WHITE, E. L. C. March 16, 1939, No. 8375. [Class 40 (v)] A modulating system e.g. for television signals, has a portion of the output rectified and fed back to the modulating input in anti-phase relation so as to reduce distortion as described in Specification 421,013. However during synchronizing pulses the output is reduced nearly to zero, so the rectifier is so biased that no feed back occurs at very small output. The invention is shown applied to a relay arrangement. The incoming carrier is rectified in the diode 2 and the vision signal developed across resistance 4 is applied to the grid of an amplifier 13. The output is applied via a cathode follower 18 to the grids of push-pull modulators 24, where it is associated with a carrier source 23 and the new modulated carrier is applied to a feeder 12 supplying an aerial. A portion of the carrier in the feeder 12 is rectified by diodes 11a, 11b and the signal developed across resistances 10a, 10b is applied as negative feed back to the amplifier 13. The diodes 11a, 11b are biased by a potentiometer 27 so as to cut-off during weak signals e.g. synchronizing pulses, and thus give no feed back. The tapping points A, B on the feeder 12 are  wave length apart to avoid incorrect operation of the diodes 11a 11b due to reflection at the junction of the feeder and the aerial.
Patent GB-435550-A (GB)
Title: Improvements in or relating to apparatus for washing, purifying or otherwise conditioning air or other gases
IPC: B01D45/10
Filed: 1934-03-19
Abstract: 435,550. Washing gases. YARDLEY, W. H., 124, Blair Athol Road, Ecclesall, Sheffield. March 19, 1934, No. 8504. [Class 55 (ii)] In apparatus for washing gases in which liquid falls over several rows of helical blades 10 disposed vertically in a casing 1, the blades in each row touch one another and the blades of one row are staggered with respect to and spaced apart from those in adjacent rows to form tortuous passages for the horizontal passage of gas. The liquid is recirculated from a tank 4 in the bottom of the casing by a pump 16 and fed on to a perforated plate 15 above the blades. The adjacent blades of a row have helices in the opposite directions. A similar battery of dry blades may be arranged behind the wet battery so as to extract drops of moisture from the gas. Specification 116,512, [Class 55 (ii)], is referred to.
Patent GB-836390-A (GB)
Title: Method of flattening and sound insulating vitreous enamelled chalkboards, architectural panels and the like
IPC: A47B97/04
Filed: 1958-03-17
Abstract: 836,390. Building panels. VITREOUS ENAMELLING CORPORATION (PROPRIETARY) Ltd. March 17, 1958 [April 3, 1957], No. 8549/58. Class 87(1) [Also in Group XV] A vitreous enamelled architectural panel 1 is flattened and sound insulated by an adhesively secured sound insulating sheet 8 and struts 7 which are secured by bolts 6 to lugs 4 welded to the back of the panel 1. The edges of the panel are bent over to form peripheral channels into which the struts 7 are sprung into position over the lugs 4.
Patent GB-877395-A (GB)
Title: A horizontal gas-tight electrolytic cell
IPC: C25B9/17
Filed: 1960-03-10
Abstract: 877,395. Electrolytic cells. FARBWERKE HOECHST A.G. March 10, 1960 [March 11, 1959], No. 8557/60. Class 41. A horizontal gas-tight electrolytic cell has a metal cathode 1 constituting at least one of the cell walls and a metal anode 2 extending across the cell and spaced from the cathode 1 by electrically insulating material 4 located between an upper edge of the cathode and a cell cover 5, the anode having a portion 3 extending outwardly from the cell. The electrodes may be of Pt, Ti, Ta, Nb, Zr or combinations thereof, or may be of Cu plated with one of the above metals. The anode may have slots or holes for gas escape and may be stiffened by ribs, projections, corrugations or protruberances. The insulating material 4 may be of rubber or synthetic resin and may be in one layer, in two layers, as shown, or in three. In a modification, the cathode 1 and anode 2 are trough-shaped.
Patent GB-349195-A (GB)
Title: Improvements in stock-quotation projecting machines
IPC: G03B21/134
Filed: 1930-03-18
Abstract: 349,195. Feeding and winding webs. DECKER, J. W., 60, Broad Street, New York, U.S.A. March 18, 1930, No. 8693. [Class 100 (i).] In a combined stockquotation ticker and optical projecting apparatus, tension is maintained in the tape a, Fig. 1, passing through the projecting apparatus 4 by means of two pairs of tapegripping rollers 15, 16 and 17, 18 which are driven by the tape as it is drawn forward by the rollers 19, 20, the rollers 17, 18 moving at a slightly higher surface speed than the rollers 15, 16. This is obtained by making the roller 18 of slightly larger diameter than the roller 16 and connecting the rollers by a chain 26 so that they rotate at the same angular velocity. The tape passes from the drawing rollers 19, 20 to a winding reel 23, Fig. 3. The shafts of the reel 23 and roller 20 are driven by slipping belts from a shaft 34 driven continuously by an electric motor through belt 39, worm 36, and worm wheel 35. When the ticker 3 ceases to eject tape, the roller 20 draws the tape forward until the loop 57, Fig. 1, of tape between the ticker and projector is taken up, after which the belt driving the roller 20 slips. The reel 23 continues to rotate until a brake block 54, secured to a pivoted arm 22 having a finger 21 resting on the tape, is pressed into engagement with a brake drum 55 on the reel, after which the belt driving the reel also slips.