baber/WOPTO huggingface dataset:
Patent GB-1116489-A (GB)
Title: High frequency transistor structure and method of making same
IPC: H01L21/331
Filed: 1966-09-19
Abstract: 1,116,489. Semiconductor devices. GENERAL ELECTRIC CO. 19 Sept., 1966 [9 Nov., 1965], No. 41749/66. Heading H1K. The lateral resistance of the base region of a transistor is reduced by contacting it at a plurality of points distributed within the emitter region. Boron is diffused through an aperture in an oxide layer layer (11) into an N-type silicon wafer (10) doped with phosphorus to produce a P-type base region (12), Figs. 1 to 4 (not shown). The surface is reoxidized and is masked and etched to form a pattern of oxide dots (15) on the base region, Figs. 5 and 6 (not shown). Phosphorus is diffused-in to form a continuous emitter region (17) penetrated by extensions of the base region (12). The pattern of oxide dots (15) is removed and the wafer electrolytically etched to selectively remove P-type material so that the extensions of the base region are partly removed forming cavities which extend to a depth less than that of the emitter diffusion, Fig. 9 (not shown). The wafer is then rotated in vacuo about an axis perpendicular to its major faces and an insulating material such as silicon oxide is evaporated on to the wafer at an angle to the axis of rotation so that it is deposited on the surface of the emitter region (17) and on the sides but not the floor of each cavity, Figs. 10 and 11 (not shown). A strip of oxide is removed to expose an area (18) of the emitter region (17) adjacent to its edge and a layer (23) of aluminium is evaporated or sputtered on to the surface, Figs. 12 and 13 (not shown). Part of the aluminium layer (23) is removed by etching with a mixture of ammonium persulphate and hydrofluoric acid to separate the area 21 contacting the emitter region 17 from the remainder 20 of the layer which contacts the base region at the base 22 of each cavity but is insulated from the emitter region by the oxide layer 19, Figs. 14 and 15. Contacts 25, 26 are welded or thermocompression bonded to the electrode layers 20, 21 and the collector region is contacted by gold-soldering a metal electrode 24 to the lower face of the wafer and welding a lead 27 to it. A plurality of devices may be simultaneously produced in a single wafer. The base region 12 may be produced by epitaxial deposition instead of by diffusion. In a modification, Fig. 16 (not shown), the emitter and base electrodes are interdigitated.
Patent GB-1443718-A (GB)
Title: Control of -blooming- in charge-coupled image sensing arrays
IPC: H04N5/335
Filed: 1973-09-05
Abstract: 1443718 Charge transfer imaging device RCA CORPORATION 5 Sept 1973 [11 Sept 1972] 41749/73 Heading H1K In order to prevent blooming in a charge coupled image sensing array which includes columns of sites at which mobile charge carriers produced by an image are integrated and stored, a bus, adapted to act as a drain when suitably - biased, is provided together with means for establishing a surface potential between the sites and the drain such that any excess charge carriers overflow into the drain rather than into storage sites in the adjacent or the same column. In the silicon array described charge is transferred from the sensing array to a temporary storage array and thence to an output register. The electrodes under which the charge is stored and which are also used as transfer electrodes may be of aluminium or alternately ones at different levels above the silicon surface of aluminium and polysilicon respectively. The image may be incident on the electroded face, or, if the silicon wafer is locally thinned and provided with a heavily doped layer to reduce surface recombination, from the back. In the array shown in part in Fig. 3 adjacent pairs of aluminium and polysilicon electrodes are interconnected to give stepped potential wells to ensure unidirectional transfer of charge. The drains 30, 30a are of opposite conductivity type to the substrate and associated with independently biased barrier gates 32, 32a overlapping both edges of the drains. Alternatively the polysilicon barrier gates directly contact the drains which are formed by diffusion of impurity therefrom (Fig. 13, not shown). One mode of operation in which alternate electrodes are differently biased during the integrating period and overlapping two phase clock pulses used to transfer the charge allows large charge storage but blooming may occur during transfer, whereas in systems in which non-overlapping two phase or overlapping four phase pulses are used during transfer this is avoided. Where the drains and associated electrodes are independent the bias on the latter may be varied so that it can as an electronic shutter allowing part or all of the optically generated charges to go to the drain. The sensitivity can alternatively be altered by varying the drain bias and hence the extent of the associated depletion region. The electrode structure is formed by first oxidizing the silicon surface and then depositing polysilicon, heavily diffusing it with boron at electrode sites, selectively etching away undoped polysilicon, repeating the process to produce a second set of electrodes and finally applying aluminium electrodes over further oxide. Alternatively if a uniform thickness of insulation is required under the electrodes the first oxide layer is coated with alumina or silicon nitride, thus restricting oxidation in later steps to the polycrystalline silicon areas. Reference has been directed by the Comptroller to Specification 1,413,092.
Patent GB-912094-A (GB)
Title: Lapping arrangement
Inventor: NAMENYI-KATZ LASZLO
IPC: B24B11/00
Filed: 1959-12-09
Abstract: 912,094. Lapping. PAYNE PRODUCTS INTERNATIONAL Ltd. Dec. 20, 1960 [Dec. 9, 1959], No. 41852/59. Class 60. Apparatus for lapping part-cylindrical surfaces of articles on a lapping-machine having at least one lapping plate rotatable in a horizontal plane and a carrier plate adapted to rotate in a path differing from the rotational path of the lapping plate, comprises a member attachable to each article and having surfaces which form continuations of the part-cylindrical surface of the article, an opening in said carrier plate for receiving each said member and an attached article, and means which, in operation, cause each member to be given a reciprocatory rotary motion about the centre of curvature of said surfaces of each member. A lapping plate 11, e.g. of cast iron, is carried by a motor-driven spindle 13. A fixed ring 14 is supported just above the upper surface of the plate 11 in such a way that its internal surface 15 is eccentric to the axis of the spindle 13. A carrier plate 16 rests on the upper surface of the plate 11. The plate 16 is positioned within the ring 14 and its diameter is slightly smaller than that of the internal surface 15 of the ring. The plate 16 has a number of equally spaced rectangular openings 17. The workpieces 18 are magnetic recording/reproducing heads for tape recorders; each workpiece is fitted into a member 19 which forms a continuation of the partcylindrical surface 20 of the workpiece. The members 19 may be made of, or coated with, a material having a low coefficient of friction, e.g. nylon or P.T.F.E. Each member 19 has a cranked arm 20 having at its end a weight 21, e.g. of steel, lead or a heavy alloy. Each member 19 is placed in one of the openings 17 in such a way that the weight 21 leans towards the centre of the plate 16. The cranked arms 20 engage the edge of a disc 22 supported by a rod 23 and an overarm support 24 mounted on a fixed part of the machine, the disc 22 being eccentric with respect to the axis of rotation of the carrier plate 16.
Patent GB-1504386-A (GB)
Title: Coil forming and transfer apparatus
IPC: B21C47/24
Filed: 1975-10-13
Abstract: 1504386 Coiling rolling mill products; removing wound coils MORGAN CONSTRUCTION CO 13 Oct 1975 [8 Nov 1974] 41858/75 Heading D1T An apparatus of the kind in which a rolling mill pours its product 40, Fig. 1, into a rotating coil forming chamber 14 comprising a central upstanding core 18 on a support plate 16 is characterised by a pickup device 62 which can be opened to receive a coil resting on the support plate 16 and which can be closed to support the base and sides of the coil when the plate 16 and coil are vertically separated, and means for transferring the pick-up device 62 from a first pick-up position to another position. In Fig. 1 a piston rod 32 is used to raise the completed coil to an elevated position, shown in cross-hatched lines in Fig. 3, where the pickup device 62 is in its first pick-up position to receive and support the elevated coil upon subsequent lowering of the plate 16, and means for then moving the coil transfer means 46 to a further position. In Fig. 3 the coil transfer means 46 includes a loom 58 on which a plurality of depending legs 62 are pivoted at 64. The legs 62 include counterweighted sections 66 that bias the legs 62 to an open setting indicated in broken lines. When a completed coil has been raised on its plate 16 to an elevated setting, operating assemblies 80, 84, 86 are actuated to swing the legs 62 to a closed setting, shown in full lines, such that inwardly projecting foot portions 68 on the legs swing to coil supporting positions under the completed coil, the foot portions 68 extending into peripheral notches formed in the plate 16. These notches permit the plate 16 to be lowered without snagging the foot portions 68 and so leave the coil supported by the legs 62. The operating assemblies 80, 84, 86 are then actuated to swing rollers 80 thereof away from the legs 62, the legs 62 remaining in the full lines setting by virtue of the weight of the coil resting on the foot portions 68. The beam 58 is then rotated from the setting shown in Fig. 3 to that shown in Fig. 1 where the coil is over an elevator 98. An empty core 118, on a lower trolley 116, is moved to the left off a turntable 114 and along a lower track 108c onto the elevator 98. The elevator is then raised to cause the core 118 to enter the coil and to cause the trolley 116 to lift the coil off the foot portions 68, the trolley 116 having notches into which the foot portions 68 can depend. This causes the legs 62 to swing outwardly away from the coil by virtue of the counterweights 66, and the loaded trolley is then moved to the right along an upper track 108b to a second turntable 112. The beam 58 then swings back to a settingover the chamber 14 to await the elevation of the next completed coil and the elevator 98descends to the level of the track 108c to await the next empty core 118.
Patent GB-1172198-A (GB)
Title: Field Effect Semiconductor Device
IPC: H01L31/113
Filed: 1968-09-04
Abstract: 1,172,198. Semi-conductor devices. NATIONAL CASH REGISTER CO. 4 Sept., 1968 [21 Sept., 1967], No. 42021/68. Heading H1K. A field-effect device comprises a layer 6 of semi-conductor material provided with two spaced current electrodes 2, 4 and a control electrode between the electrodes 2, 4 comprising a translucent conductive film 10 on a layer 8 formed of a material capable of displaying persistent internal polarization after simultaneous exposure to light and application of a potential to the film 10, and capable of being depolarized by exposure to light in the absence of the potential. The device exhibits a high or low impedance between electrodes 2, 4 dependent upon whether or not the layer 8 is polarized, due to the field effect of the spaced charges in the layer 8 on the underlying part of the semiconductor layer 6. Suitable switching light is in the U.-V. region, and is incident upon the layer 8 through the conductive film 10. For N-type material the potential applied to the film 10 is positive to induce a highly conductive state, and for P-type material it is negative. In the illustrated embodiment the semiconductor layer 6 is entirely of N-type CdS doped with Cu or Cl, Si or Ge, formed on a substrate 1 and provided with In, Au, or Cr electrodes 2, 4 and a translucent Al film 10. The polarizable layer 8 may be formed of anthracene phosphor, ZnS, ZnS and CdS, chrysene, transstilbene or 9-bromoanthracene. Leads 3, 5, 13 are of Cu, attached to the electrodes, e.g. by Ag or Cu paint. In an alternative form the semiconductor layer comprises an N-type body (14), Fig. 2 (not shown), provided with two spaced P-type zones (16, 18) on which are respectively situated the current electrodes (20, 22).
Patent GB-1135298-A (GB)
Title: Hairdressing compositions
Inventor: STAINSBY WILLIAM JOHN
Filed: 1966-09-20
Abstract: 1,135,298. Hairdressing compositions. COOPERATIVE WHOLESALE SOCIETY Ltd. 13 Sept., 1967 [20 Sept., 1966], No. 42043/66. Heading A5B. A clear transparent gel hairdressing for the alleviation of dry rough scalp conditions comprises an oil-in-water gel containing water, a colourless, odourless mineral oil, an alkyl ester of a fatty acid in which the alkyl group contains up to 6 carbon atoms, at least one watersoluble emulsifier, and propane -1,2-diol. The water soluble emulsifier may be a mixture of ethoxylated oleyl alcohols e.g. polyoxyethylene alkyl ethers of oleyl alcohol having degrees of ethoxylation of from 5 to 20 moles of ethylene oxide per mole of oleyl alcohol. The mineral oil may have a viscosity of from 100 to 850 seconds Redwood No. 1 at 70‹F. and the fatty acid ester can be the isopropyl ester of a fatty acid, e.g. linoleic acid, myristic acid, palmitic acid or stearic acid. The compositions may also contain lanolin, colouring and/or perfume.
Patent GB-927409-A (GB)
Title: Improvements in or relating to the manufacture of a composite stock
Inventor: BRICK ROBERT MAYNARD
IPC: B21C37/14
Filed: 1960-12-08
Abstract: 927,409. Making tubes. CONTINENTAL CAN CO. Inc. Dec. 8, 1960, No. 42208/60. Class 83 (2). A method of making a composite stock having metal layers 12 separate and non- welded to one another, comprises preparing a metal billet having an internal channel containing a soluble weld preventing resist material 13 which remains solid at a hot-rolling temperature for the metal and with the metal of the billet enclosing the resist material, heating to the said hot-rolling temperature for the metal and extending the surface area of the billet and thereby reducing its thickness wherewith the metal and resist material are conjointly extended to form a body having surface layers of metal connected at the edges of the reduced billet and an intervening internal layer of the residue of the resist material, separating the metal layers, and washing the resist material from the metal layers. Sodium chloride, sodium or potassium dichromate and tri-sodium phosphate are given as examples of resist materials. The production of single- and multiple-bore tubes is described.
Patent GB-972494-A (GB)
Title: Frequency-stable relaxation oscillator
IPC: H03K4/14
Filed: 1960-12-09
Abstract: 972,494. Valve pulse generating. STANDARD TELEPHONES & CABLES Ltd. Dec. 9, 1960 [Dec. 15, 1959], No. 42490/60. Heading H3P. In a frequency stabilized relaxation oscillator which comprises at least one space discharge device generating both relaxation and sinusoidal oscillations, a positive feedback path comprising a frequency selective R.C. ladder network is connected from a first electrode to a second, and a non-selective feedback path is connected from the first electrode to a third. A cathodecoupled multivibrator comprises a hexode or heptode 17 and one triode 30 cross-coupled. The cathode, first control grid and screen grid of the valve 17 operate as a triode, the screen being coupled by capacitor 29 and resistor 31 to the grid of valve 30 for the relaxation oscillation, and by the phase-shifting R.C. network 18-25 back to its own grid to provide the sinewave oscillation. The anode current is fed into the phase shift network at the junction of resistors 20, 22 where it is approximately in quadrature with the existing signal, and frequency control may be effected by varying this current by means of a control potential applied to the second control grid via resistor 35. A sawtooth output is provided by resistor 33 and capacitor 32. In an alternative form, Fig. 1 (not shown), the multivibrator comprises two cross-coupled triodes, the ladder network being coupled from the anode of one back to its own grid. In a second embodiment, Fig. 3, a hexode or heptode has a capacitor 47 connected between screen and second control grid to provide a transitron action, and a R.C. phase shift network 38-43 connected between the screen and first control grid to produce the sine wave oscillation. The R.C. phase shift networks for both embodiments are designed to have a high input impedance, and a low output impedance. Alternatively, a pentode may be used in the transition circuit. Specification 688,035 is referred to.
Patent GB-886445-A (GB)
Title: Retractable writing instrument
Inventor: PETERSEN POUL ASGER SCHACHT
IPC: B43K24/08
Filed: 1959-12-14
Abstract: 886,445. Reservoir pens. OLSEN A.S., CHR. Dec. 14, 1959, No. 42494/59. Class 146(3) In a retractable writing instrument, e.g. a ball-point pen, the writing unit 1 or a component of the projecting mechanism co-operating therewith engages, through a transverse pin 14, a movable plate 15 which is placed behind a window 18 in one side of the instrument and extending over a substantial part of its length, the plate 15 bearing various designs, letters or numbers which will be located in different positions depending upon the position of the writing unit. The writing unit 1 is biased rearwards by a spring 3 and is secured at its rear end to a foot 6 on a plunger 4. The plunger 4 has the pin 14 fixed thereto and has another pin 8 slidable in a transverse hole therein. The pin 8 is biased outwards by a leaf spring 9 secured to the plunger and when the writing unit is in its projected position the pin engages a recess 11 in the barrel 2 to latch it in that position. A member 12 is pivotally mounted at 13 in the recess 11 and is pressed inwards to disengage the pin 8 from the recess and allow the writing unit to be retracted by the spring 3. Interposed between the plate 15 and the window 18 is a mask 17 formed with openings 16. The pin 14 engages a hole in the plate 15 which bears letters on its outer surface, one set of letters being exposed in the openings 16 when the writing unit is in retracted position. When the unit 1 is projected the plate 15 is moved relatively to the mask 17 so that different letters appear at the openings. Diametrically opposite to the window 18 is a second window 19 behind which a stationary strip 20 bearing a picture or lettering is mounted. In a modification both sides of the instrument may have a movable plate such as 15. In instruments in which the actuating plunger merely projects the writing unit and does not move back with the writing unit in its movement from projected to retracted position the plate 15  may be caused to move with the writing unit 1, the pin 14 being mounted on the unit. Both the plate 15 and the mask 17 may be movable one being connected to the writing unit and the other to the plunger so that each follows the movements of its associated part. The pin 14 may be secured to the plate 15 and engage a hole in the plunger 4.
Patent GB-1450386-A (GB)
Title: Puppets and to photographic methods and films produced tehreby  using the puppets
IPC: A63H3/04
Filed: 1972-09-13
Abstract: 1450386 Puppets LARRY THE LAMB Ltd 12 Sept 1973 [13 Sept 1972] 42595/72 Heading A6S [Also in Division G2] A puppet comprises angular contours i.e. there are lines of intersection between adjacent surfaces and cross sections of the puppet show angularity, part of the surfaces 2, 3 forming the front of the puppet are outwardly convex or substantially planar, and the limbs comprise a flexible material e.g. polyurethane foam including bendable wire inserts which permit the limbs to be bent and maintain their position, the side surfaces 1 of the limbs being substantially planar. The eyes are represented by wooden balls which can be rotated by inserting a pin in the recessed pupil and the mouths are formed by a slit into which a wedge may be inserted to represent an open mouth. The puppets are used to make animated films.
Patent GB-1004226-A (GB)
Title: Very high resistance measuring device
IPC: G01R27/02
Filed: 1963-10-29
Abstract: 1,004,226. Measuring resistance. TESLA NARODNI PODNIK. Oct. 29,1963 [Nov. 5, 1962; Sept.17, 1963], No. 42657/63. Heading G1U. An arrangement for measuring a very high resistance R1 includes a voltage source 1 which establishes a current flowing through R1, this current being balanced by an opposite polarity current derived from a source of steadily increasing voltage through a capacitor C1. This source of steadily increasing voltage consists of an integrating amplifier 4 having an integrating resistor R2 and an integrating capacitor C2, supplied from a D.C. voltage source 2. This voltage is adjusted until a steady null condition is derived, as shown on the indicator 3A supplied from the difference amplifier 3, at which condition the relation is satisfied. The output from the difference amplifier 3 may be used to alter the voltage of the source 2 automatically (Fig. 3 not shown) and an amplifier may be included between the D.C. amplifier 4 and the capacitor C1 (Fig. 4 not shown). Such an arrangement minimises the effect of the leakage resistance of the capacitor C1.
Patent GB-1149690-A (GB)
Title: Improvements relating to ticket dispensing devices
IPC: B65C9/36
Filed: 1967-09-20
Abstract: 1,149,690. Dispensing labels. GUHL & SCHEIBLER A.G. 20 Sept., 1967 [29 Sept., 1966], No. 42866/67. Heading B8C. Gaps 14 (Fig. 4) between labels carried by a backing strip 12b are detected, to control the feed of the strip, by a feeler 8 connected by a linkage 16, 16<SP>1</SP>, 16<SP>11</SP>, to produce relative movement between a permanent magnet 9 and an electrical coil 10 to generate an electric pulse. In the form illustrated a motor (5) (Fig. 1, not shown) driving a spool (4) to draw the tape round a sharp edge 3 to detach the labels is switched, off when the feeler 8 falls between two labels and is switched on again when a feeler 11, which may be remote from the feeler 8, detects that the detached label has been removed. The sensing devices are shown mounted on a casing 2<SP>1</SP> which can be swung upwardly about a shaft 14 for access to the strip, and may also be moved axially. The casing is biased by an adjustable spring (not shown) to brake the movement of the strip.
Patent GB-1277927-A (GB)
Title: Improvements in or relating to needle bearing assemblies
IPC: F16C27/06
Filed: 1969-08-29
Abstract: 1277927 Bearings NADELLA and A PITNER 29 Aug 1969 [30 Aug 1968] 43043/69 Addition to 1204156 Heading F2A A needle bearing assembly comprises an outer race, a member for supporting the outer race in a bore of a machine element and a set of rollers. The space between the outer race and a raceway formed on a shaft supported by the bearing is reduced in a number of circumferentially-spaced zones by radial deformation of the outer race resulting from axial compression of the member. In an embodiment an outer race 4, Fig. 1, of a roller bearing is mounted in a member 9 of elastomeric material which is compressed axially by means of a ring 10 being screwed into a threaded portion of a bore 2 formed in a frame 3. The member 9 is constrained in a radially-outwardly direction by the frame 3 and is deformed radially inwardly, especially in zones A, B, C, Fig. 2. The latter are formed between portions of the outer race 4, each of which has an outwardly directed radial flange segment 6 and an inwardlydirected radial flange segment 7. In other embodiments the member comprises a metal portion 16, Fig. 3, and an elastomeric portion 19, the screwed ring 10 is replaced by a pressfitted member 23, Fig. 4 (not shown) which is welded in situ at 25 and a member 28, Figs. 5 and 6 (not shown) comprising a flange 36 which is abutted by a screwed ring 37, and a portion which is received in a tapered bore 32 of the frame said portion having alternate hollow segments 34 and solid segments 33, the latter having edges which are bent radially outwardly at 33a and engage said tapered bore 32.