baber/WOPTO huggingface dataset:
Patent GB-1070278-A (GB)
Title: Method of producing a semiconductor integrated circuit element
Inventor: CHANG JOSEPH JUIFU
IPC: H01L21/82
Filed: 1964-08-13
Abstract: 1,070,278. Semi-conductor devices. WESTERN ELECTRIC CO. Inc. Aug. 13, 1964 [Aug. 19, 1963], No. 32975/64. Heading H1K. In a method of producing a plurality of electrically isolated regions of semi-conductor material in a single wafer, a pattern of slots is formed in one face of a slice of semi-conductor material, dielectric material is deposited in the slots and on the slotted face, and sufficient material is removed from the opposite surface of the slice to expose the bottoms of the slots. As shown, one surface of a slice 10 of N-type silicon is polished and then masked by vapour depositing layers of aluminium and nickel, sintering, coating with photoresist and gold plating the exposed metal surfaces. The remaining photoresist is removed and the metal layer and underlying semi-conductor material not protected by the gold plating are etched away to produce a pattern of slots. The remaining metal layers are removed and silicon dioxide is vapour deposited in the slots and on the surface of the slice to form a dielectric layer 16 to which a polycrystalline or low-quality silicon slice 17 is cemented. Alternatively a polycrystalline layer may be deposited on the silicon oxide layer. The lower face of the slice is now removed at least to the line 18 so that the silicon slice is divided into a plurality of electrically isolated regions in which elements of integrated circuits, such as transistors, diodes, resistors and PN junction capacitors may be produced by diffusion and/or epitaxial deposition. Metal electrodes may be applied and interconnections made to form an integrated circuit. The surface of the slice in which the slots are etched may be provided with an N<SP>+</SP> type layer 11 by diffusion to provide lowresistance collector regions for transistors. Alternatively the original slice may comprise a high-resistivity N-type layer epitaxially deposited on an N<SP>+</SP> type substrate. The semiconductor material may also be germanium or an intermetallic compound, and the silicon dioxide may be replaced by other glasses.
Patent GB-216942-A (GB)
Title: Improvements in selenium cells
IPC: H01L31/06
Filed: 1922-12-04
Abstract: 216,942. Prior, W., and Riley, C. E. Dec. 4, 1922. Selenium cells. - In a cell formed by applying a layer of selenium to the surfaces of electrodes constituted by two wires wound bi-spirally on an insulating base, the location of selenium between the convolutions is prevented by the use of one insulated wire 6, Fig. 3, and one uninsulated wire 5 or of two insulated wires 6, 7, Fig. 4, wound closely side by side. The insulation is removed from the outer surfaces of the wire before applying the selenium 9. The capacity of the cell shown in Fig. 3 may be increased by the use of an insulated wire 6 of greater diameter than the uninsulated wire 5. In a modification, Fig. 6, for use with high voltages, the wires 5 and 7 are separated by an insulated or non-conducting wire 8. The wires 5, 6 or 5, 7 may be of different conducting materials. The selenium may be applied in melted form and subsequently baked, or the bared wires may be clamped into contact with a thin sheet of selenium supported on a sheet of glass or mica.
Patent GB-787934-A (GB)
Title: Microspheroidal siliceous catalysts and method of producing same
IPC: B01J21/12
Filed: 1955-11-18
Abstract: <PICT:0787934/III/1> <PICT:0787934/III/2> In a process for producing silica-containing catalysts in micro-spheroidal form, an aqueous dispersion of hydrated silica-containing catalyst material is sprayed outwardly from an axis to impinge on convex surfaces, rotating around said axis, from which the material is discharged in the form of discrete particles into a current of a hot gas.  A suitable apparatus comprises a large cylindrical chamber 2, Fig. 1, on which is mounted a spray member 8 driven at 8000 to 13,000 revs. per min., an inlet pipe 9 for the aqueous dispersion which is fed by a highpressure pump 10 through a homogenizer 11, and a hot gas supply line 6.  The spray member 8, Fig. 3, is provided at the periphery with a set of vanes 16 which are convex towards the direction of rotation.  In operation, the homogenized slurry sprays outwardly from the axis of rotation to meet the convex surfaces 17 over which it spreads as a film and is then flung off as discrete particles, which form an umbrellashaped cloud of droplets falling through a gas at 700 DEG  to 1000 DEG  F., e.g. the combustion products of natural gas.  The convex surfaces allow the particles to form and leave the surface without distortion, and when dried are of more uniform size in the range 40 to 80 microns. A silica gel slurry containing 4 to 9 per cent of solids may be used, and may contain in addition magnesium oxide or alumina. U.S.A. Specification 2,478,519 is referred to.
Patent GB-534131-A (GB)
Title: Improvements in hard metal compositions
IPC: C22C29/06
Filed: 1939-12-29
Abstract: 534,131. Alloys. MALLORY METALLURGICAL PRODUCTS, Ltd., and HUNT, L. B. Dec. 29,1939, No. 33055. [Class 82 (i)] Hard metal alloys for electric contacts, circuit breakers, and the like consist of 40-85 per cent. of one or more of the metals, tungsten, molybdenum, zirconium, and titanium, or refractory compounds thereof, such as carbides, borides, or nitrides, together with a non-agehardenable alloy of silver with one or more of the metals cadmium, zinc and magnesium, the ranges of which may be 0.5-25 per cent., 0.5-25 per cent. and 0.1-15 per cent. respectively of the silver alloy. Examples of the silver alloys contain (1) 0.5-10 per cent. of magnesium; (2) 0.5-5 per cent. of magnesium and 0.5-10 per cent. of cadmium ; (3) 0.5-10 per cent. of magnesium and 0.5-7.5 per cent. of zinc. The products may be made by pressing and sintering the refractory metal or compound in powder form and placing it in contact with the silver alloy at above the melting point of the latter, followed if desired by repressing and resintering. Specification 513,623 is referred to.
Patent GB-1429316-A (GB)
Title: Tape recording and playback apparatus
IPC: G11B15/18
Filed: 1972-07-14
Abstract: 1429316 Cassette recorder PLESSEY CO Ltd 29 June 1973 [14 July 1972] 33058/72 Heading G5R In a cassette tape recorder, two continuously driven pulleys 34, 35 are driven in opposite directions about cassette reel drive spindles 3, 4 and solenoid operated clutches 41, 42 are provided to selectively couple the pulleys to their respective spindles for fast wind and rewind. Pulley 34, which includes half 58 of a toothed clutch, rotates about a sleeve 55 mounted on machine base 1 and a shaft 53 of reel drive spindle 3 extends through the sleeve and carries the other half 56 of the toothed clutch. The half 56 of the clutch is rotationally fixed to but axially movable along shaft 53 so that on operation of solenoid 42 the two clutch halves are brought into engagement against the action of spring 57 and the spindle 3 is driven at high speed. Magnetic heads 7, 8 and pinch roller 9 are mounted on bar 5 which can be moved to an outer position when a cassette is changed, restored to an intermediate position for fast forwarding and rewind and moved to a record/play-back position by solenoid 24. In this latter position the heads penetrate the cassette to firmly engage the tape, the pinch roller engages capstan 19 to drive the tape and idler wheel 26 couples the capstan to the flange 31 of a slipping clutch including felt pad 50 for driving spindle 3. Guide member 48 for the tape emits light which passes via the tape to a light detector 49 on the arm 5 to detect the end of a tape.
Patent GB-1329060-A (GB)
Title: High frequency electronic devices
IPC: G11C11/22
Filed: 1971-07-14
Abstract: 1329060 Discharge tubes THOMSON-CSF 14 July 1971 [30 July 1970] 33099/71 Heading H1D A discharge tube for the amplification, or storage, of a microwave signal includes an electron beam source 1, 2, a delay line 5 to which the signal is coupled, the electron beam being arranged to strike simultaneously the whole effective length of the delay line to excite secondary emission therefrom, and means 10 to collect the secondary electrons. The beam velocity and the delay line surface material are chosen to give a secondary emission coefficient greater than unity, whereby the positive peaks of a wave propagating through the delay line attract the beam electrons which thereby, by secondary emission, increase the positive potential of those peaks and hence amplify the wave. The delay line may, as shown, be electrical and of interdigitated form, either constructed of a secondary emissive material or coated successively with such a material (8, Fig. 2, not shown) and with a conductor (9), or may be mechanical and of piezoelectric material. The tube may, alternatively, be employed for the storage of a signal, in which case the conductive surface is omitted, so that charge may accummulate on the delay line surface. The high frequency signal pulse to be stored is applied to the delay line input, the electron beam being blocked by the control grid 4 for a period sufficient to allow the signal to appear on the delay line, whereafter the grid 4 is pulsed to pass the beam for about a quarter or less of the period of the h.f. signal, the grid 10 being held at a potential such that the secondary electrons fall back on to the insulating layer 8 coating the delay line, concentrating at the positive peaks of the signal. The charge pattern remains trapped on the insulating surface producing, for the case of a piezoelectric delay line, an associated mechanical stress in the crystal; to release the stored signal, the beam is again permitted to impact the surface, whereupon the charge pattern is erased, the consequent release of the mechanical stress pattern triggering two surface waves propagating in opposite directions, that one which propagates in the same direction as the initially injected signal to the output of the tube constituting a replica of the latter signal. In a further embodiment (Fig. 5, not shown) a piezoelectric body is provided with several inputs and outputs, and the electron beam may be deflected over a desired one or more regions of the body, for independent amplification or storage of the signal applied to different inputs; it is stated that an electrical delay line may alternatively be employed in this embodiment.
Patent GB-840056-A (GB)
Title: Improvements in or relating to horological balance-wheels
IPC: G04B18/00
Filed: 1957-10-23
Abstract: 840,056. Watches. MONTRES ROLEX S. A. Oct. 23, 1957 [Feb. 9, 1957], No. 33111/57. Class 139 [Also in Group XXV] A watch balance 1, Fig. 1, has regulating screws 2 the head of each of which is non- circular in cross-section at least over part of its height. The non-circular part may be shaped as shown in Fig. 3 and for adjustment purposes is engaged by a hole of complementary shape in the end of a spanner like tool.
Patent GB-1107835-A (GB)
Title: Colour television receiver
IPC: H04N9/26
Filed: 1965-08-03
Abstract: 1,107,835. Colour television. SONY CORPORATION. 3 Aug., 1965 [3 Aug., 1964], No. 33150/65. Heading H4F. [Also in Division H1] A colour television receiver, Fig. 2-A, utilizing a cathode-ray tube having a screen formed of a repeating sequence of blue, red and green vertical phosphor strips 7B, 7R, 7G and incorporating a colour switching grid structure 8a, 8b, is operated to reproduce colours in a line sequence by controlling the switching grid with a signal as shown in Fig. 2-B, in which each step has the duration TH of a line, whilst line-sequential colour-difference signals G-Y, B-Y, R-Y are applied to modulate the beam intensity control grid. In accordance with the invention the vertical resolution of the reproduction is increased by subjecting the beam to a high-frequency wobble over a distance, corresponding to three scanning lines a, a<SP>1</SP>, a<SP>11</SP> and modulating the cathode of the tube with a dotsequential signal which is synchronous with the wobble and is formed of luminance signals Y, Y<SP>1</SP>, Y<SP>11</SP>, where Y is the luminance signal received directly and Y<SP>1</SP> and Y<SP>11</SP> are the luminance signals after delays of one and two lines respectively. In the particular example disclosed the signals are derived from an N.T.S.C. signal. The spot wobble and dot-sequential signal are produced at sub-carrier frequency. In a modification. Figs. 4 and 5 (not shown), the spot wobble and dot-sequential signal are dispensed with and the tube is provided with a gun having a special cathode arranged to produce a beam extending vertically over the distance corresponding to three lines. Three grids control separately the lower, middle and upper portions of the beam and are controlled simultaneously by the three luminance signals.
Patent GB-1389049-A (GB)
Title: Brake actuator for remote control vehilce
IPC: B60T7/16
Filed: 1972-07-14
Abstract: 1389049 Remote control vehicle VEREINIGTE FLUGTECHNISCHE WERKEFOKKER GmbH 14 July 1972 [16 July 1971] 33168/72 Heading B7H In a remote-control vehicle the brake pedal 5 is operated by a device including a pressure plate 30 which contacts the brake pedal 5 and which can be moved to operate the brakes by (a) an electric motor 13 having a low-inertia disc rotor and acting through gearing and an actuating rod or, in an emergency, by (b) a piston and cylinder device. For normal braking the electric motor 13 drives an intermediate shaft 18 via gears 16, 17. The shaft 18 carries pinions 20, 21 which mesh with racks 22, 23 carried by actuating rods 25, 26 which are releasably secured to the pressure plate 30. A tacho-generator 14 is mounted on and driven by the motor 13, the output of the tacho-generator being applied to a regulating device controlling the operation of the motor 13. For emergency braking, e.g. should the motor 13 fail, the pressure plate 30 is moved by the piston-rod of a pneumatic piston and cylinder unit 40, supply of compressed air to the unit 40 being controlled by a solenoid valve 51. During emergency braking the pressure plate 30 becomes detached from the rods 25, 26. The brake operating device is housed in a frame 12 which is attached by quick-release clamps 15 to a base 11 mounted on the floor 10 of the vehicle and the reaction of the braking effort is taken up by thrust rods 6, 7 arranged between abutments 3, 4 on the frame 12 and on the floor 10 respectively.
Patent GB-1482442-A (GB)
Title: Entrainment separators
IPC: B01D45/16
Filed: 1974-07-26
Abstract: 1482442 Centrifugal separators E I DU PONT DE NEMOURS & CO 26 July 1974 [9 Aug 1973] 33206/74 Heading B2P A separator for removing entrained material from a gas comprises a vessel 1 provided with a riser pipe 3 for discharging material-laden gas within the vessel; an impingement cap 4 consisting of an impervious top 5 disposed above the discharge end of pipe 3 and of a skirt 6 surrounding the upper portion of the pipe and defining therewith an annular space, the cap being arranged to redirect gas in a direction sharply away from its direction of flow through the pipe; at least one vane 7 located between the riser pipe and the cap skirt, Fig. 1, or on the underside of the cap top, Fig. 5, to impart a swirling motion to the gas discharged from the pipe 3 so as to remove the entrained material by centrifugal force; collector means 8 located at or adjacent the bottom of the cap skirt 6 and below the vane for collecting de-entrained material; drain means 9 for discharging the de-entrained material from the collector means and from the vessel; and a clean gas outlet 2 from the vessel. The separator may be used to remove liquid and/or solid particles from gases. The collector means 8 is in the form of a weir from which the liquid or slurry is discharged via downcomers 9. In Fig. 1, the vanes 7 may be attached to the riser or to the cap skirt. In order to scrub the gas or coalesce entrained material before separation, a plug of fibrous material may be mounted in the discharge end of the riser pipe and nozzles may be provided upstream of the plug to spray scrubbing liquid across the riser cross-section and towards the plug. The clean gas may be exited at the bottom of the vessel.
Patent GB-745324-A (GB)
Title: Improvements in or relating to magnetic saturable-core devices
IPC: H03K23/76
Filed: 1953-11-30
Abstract: 745,324. Electronic counting apparatus; pattern-movement stepping registers. BURROUGHS CORPORATION. Nov. 30, 1953 [Dec. 3, 1952], No. 33218/53. Class 106 (1). In a device for passing a signal or signals represented by magnetic remanence in one sense or the other successively through a series of magnetic core units by applying transfer pulses thereto, a selector means is provided having input terminals connected to some or all of the core units and transmits a signal from a preselected core unit in response to the application of a transfer pulse. When employed as a counter of variable radix a single pulse is applied across terminals 71, 72 to cause the first core 51 of a chain 51, 52, 53 ... &c., to be driven from a normal resting state of negative saturation to a state of positive saturation. This causes a voltage to develop across a winding 83 on the core and current to flow through a rectifier 138, but the high back impedance of a rectifier 192 prevents the second core 52 from being affected. The counting pulses are applied through a trigger circuit 125, 126 which delivers alternate " A " and " B " pulses to alternate cores; A " pulses to cores 51, 53, 55 ... &c., and " B " pulses to cores 52, 54 ... &c. The first " A " pulse drives the core 51 to negative saturation, and the reverse voltage developed across the winding 83 causes a current through the rectifier 129 which drives the second core 52 to positive saturation. The following " B " pulse has a similar effect on the second core 52, driving the condition of positive saturation on to the next core, and so on. The radix of the counter is preselected by setting a switch arm 123 on one of the contact studs 112 ... 120, each connecting through a rectifier to respective windings 93, 94 ... &c., on the cores. After the preselected core has had its state of magnetization reversed, the " A " or " B " pulse which returns it to normal causes current in the winding 93, 94 ... &c., connected to the contact stud 112, 113 ... &c., which completes a circuit through a winding 92 on the first core 51, bringing the " condition " back to the first core again. Instead of circulating a single " condition," a plurality of suitably spaced pulses may be applied to the input terminals 71, 72 to cause a pattern of " information " to be stepped along.
Patent GB-386762-A (GB)
Title: Improvements relating to the control of electric motors
IPC: B60L15/10
Filed: 1931-12-01
Abstract: 386,762. Field control of D.C. motors. SMITHSON, J. G., Oakdale, Alvechurch, Worcestershire. Dec. 1, 1931, No. 33269. Addition to 349,777. [Class 38 (iii).] The diverter generator c of the parent Specification is connected to the motor field a by a switch h under the control of a relay f in circuit with the motor armature b. The arrangement operates to disconnect the generator c when the motor armature current exceeds a predetermined value.
Patent GB-521358-A (GB)
Title: Improvements in or relating to dog collars and dog harness
IPC: A01K27/00
Filed: 1938-11-16
Abstract: 521,358. Dog harness. GREEN, C. O. Nov. 16, 1938, No., 33270. [Class 62] The parts of dog collars, dog harness, or leashes are connected by means of bolts, instead of rivets or stitching, in order to permit. expansion of the girth or to facilitate renewal of the parts and attachment of fittings. The straps that make up the harness shown in Fig. 1 are connected by looping the end of one strap around another and passing a bolt 4 through holes 2. Several holes may be formed on the end strap to allow the size of the harness to be adjusted. Preferably the bolt 4b, Fig. 5, screws into a threaded socket.
Patent GB-428671-A (GB)
Title: Improvements in or relating to trunk locks
IPC: E05B65/50
Filed: 1934-11-19
Abstract: 428,671. Hasp fastenings and locks. BACHTENKIRCH, K., and KRAUSE GES., O., Iserlohn, Westphalia, Germany. Nov. 19, 1934, No. 33280. [Class 44] A hasp lock for trunks, attachÚ cases &c. has a bolt movable above the lock plate for engaging above the hasp which lies in a flat recess in the lock plate with its upper surface substantially flush with the plate. The hasp 21 having a stamped up end 22 lies in a recess 24 in the lock plate 1 and is retained therein by a sliding bolt 2 guided by lugs 3, 4 on the plate 1 which work in guides 5, 6 in the bolt 2. The end of the bolt 2 in its engaged position enters a raised part 23 on the plate 1. A plate 10 having holes 31, 32 slides over the projections 3, 4 when moved by a key and in its lower position lies in the path of a lug 12 on the bolt 2. A spring 7 engages a lug 9 on the bolt 2 and bears against one edge of the plate 10, a bent part 13 of the spring engaging notches in the edge of the plate 10 to hold it in its two extreme positions. A cover 14 is secured over the locking mechanism by lugs passed through holes 17, 18. A finger piece 20 is formed on the bolt to enable it to be retracted from the path of the hasp 21.
Patent GB-1465272-A (GB)
Title: Reinforcement of castable materials
IPC: E04C5/01
Filed: 1974-07-02
Abstract: 1465272 Incorporating wire strands into concrete BEKAERT SA NV 2 July 1974 [16 April 1973] Divided out of 1465271 33288/76 Heading B5A [Also in Division E1] Cast material is reinforced with short wire strands, having a thickness between 0À1 and 1À0 mm. and a length thickness ratio in the range 50 to 200, by including within the mix reinforcing members comprising a plurality of single strands bonded together by a binder which binder is subsequently disintegrated so as to release the individual strands for final mixing. The members may be bundles of straight or helical wires or straight wires with bent ends. Alternatively the members may be arrays of straight or bent wires. The cross-section of each wire may be circular or flattened and each wire may be coated with zinc, aluminium or organic material and have a roughened surface. The wires may be iron or steel alloyed with nickel or chromium. The cast material may be mortar, concrete, rubber or plastics. In hydraulic mineral cements the binder may be polyvinyl alcohol and the disintegration time varied by the incorporation of various amounts of non- water soluble polyvinyl acetate. Other soluble binders may be urea based resins, polyacrylate, albumins, gelatines, caseins or cellulose derivatives, e.g. methylhydroxy- or carboxy-cellulose. Disintegration may be produced by other constituents of the mix than water and may be by normal or special additives or by heat, i.e. by introducing steam. The parent Specification 1,465,271 (see Division E1) includes claims to the reinforcing members.