baber/WOPTO huggingface dataset:
Patent GB-1058296-A (GB)
Title: Composite insulator-semiconductor wafer and method of making same
IPC: H01L25/03
Filed: 1964-06-04
Abstract: 1,058,296. Semi-conductor devices; circuit assemblies. RADIO CORPORATION OF AMERICA. June 4, 1964 [June 28, 1963], No. 23265/64. Headings H1K and H1R. A wafer comprising a plurality of isolated regions of semi-conductor material is produced by forming a pattern of mesas on one face of a wafer of semi-conductor material, pressing heat-softened insulator material into the pattern and removing excess insulator and semiconductor material. As shown, Fig. 2, a plurality of mesas, 12a to 12f, are formed on a wafer of semi-conductor material by cutting, sawing, or etching. A sheet of glass is placed on top of the mesas and is heated until it softens and is pressed over the semi-conductor wafer to produce the wafer shown in Fig. 4. The portion 16 of glass above the mesas is ground or lapped away to expose the faces 12 of mesas 12a to 12f in which active components are produced by known techniques. A plurality of diodes are formed in each of the mesas 12a to 12c, a transistor is formed in each of the mesas 12d to 12f, and contacts are applied as required, Fig. 8 (not shown). The lower face 21 of the wafer is ground away until the mesas are separated into individual semiconductor bodies embedded in glass. This step may be performed before or after forming the active components. Passive components, such as resistors and capacitors, and connecting leads may be formed on the surface of the glass by printing or painting. A resistor 24 is connected between the collector of a transistor (body 12d) and the cathode of a diode (body 12a) by conductors 26, 28. A layer of silicon oxide may be deposited over the semi-conductor bodies, apart from the contact areas, and leads may be applied on top of the oxide layer by evaporating aluminium through a mask. The semi-conductor material may be P- or N-type germanium or silicon and the formation of the active components may include the diffusion of indium or arsenic as appropriate.
Patent GB-1552466-A (GB)
Title: Casting powder
IPC: B22D11/10
Filed: 1976-06-04
Abstract: The invention relates to a casting powder for continuous casting and ingot casting in order to obtain improved surfaces, the reaction of the metallic aluminium with the silica being avoided in the case of this casting powder. The casting powder consists of 20 to 60% of Al2O3, 20 to 60% of CaO, 0 to 15% of SiO2, O to 20% of gassing agents and up to 30% of SiO2-free fluxes with an Al2O3/CaO weight ratio of 3-0.33.
Patent GB-941691-A (GB)
Title: Reflex klystron
IPC: H01J23/04
Filed: 1962-06-18
Abstract: 941,691. Velocity-modulated beam tubes. C.S.F.-COMPAGNIE GENERALE DES TELEGRAPHIE SANS FIL. June 18, 1962 [June 21, 1961], No. 23302/62. Heading H1D. A reflex klystron includes a cathode having two portions of its emissive surface axially spaced by such a distance that the transit time of the electrons along said distance is substantially equal to half the period of the operating oscillation. In one form, Fig. 7, a central portion 10 of a circular cathode 11 is depressed a distance d. Alternatively, Fig. 9, the emissive surface is formed by three portions 12, 13, 14, the axial separation of portions 12, 14 being a distance d. In other embodiments, a semi-circular plate of thickness d is placed upon a circular support, sectors of a circle are symmetrically placed on a circular support so as to give alternate raised and lowered portions of the emissive surface, or the cathode is an inclined disc 14, Fig. 11. The axial distance d is arranged to be substantially equal, in millimeters, to 50(V 0 ) ¢/f, where V o  is the anode voltage of the klystron in volts, and f is its operating frequency in Mc/s. It is stated that such a cathode minimizes the phenomenon of power hysteresis, that is, the power developed is not single-valued for a given reflector voltage.
Patent GB-976651-A (GB)
Title: Improvements in and relating to apparatus for cutting tubes
IPC: B23D21/04
Filed: 1962-06-18
Abstract: 976,651. Sawing. SCHLOEMANN A.G. June 18, 1962 [July 12, 1961], No. 23303/62. Heading B5L.  Apparatus for cutting tubes comprises a rotary cutting tool 22 which effects a planetary movement in a single revolution about a tube 7 to be cut and is mounted on a swivel arm 18 enabling engaging and disengaging of the tool with the tube and adjustment of the tool to cut tubes of various diameters, and a tracing member 25 connecting the swivel arm with a control member 23 for moving the tool into and out of engagement with the tube, the control member being rotatable, during the cutting process, in the same direction as the planetary movement of the cutting tool so that the tool is in engagement with the tube over a circular path exceeding 360 degrees. The apparatus is mounted on a stand 1 which is located after a tube pull-off machine 1 and has guide beams 3 for a cutting head 4 driven by reduction gearing 5 from a motor 6. The cutting head, which is connected to the tube 7 to be cut by clamping device 8 operated by compressed-air cylinders 9 during a cutting operation, has a rotor 12 rotatable on needle roller bearing 11 in a housing 10 by gearing 27, 30 driven from the unit 5. The cutter 22 is mounted on a shaft 19 at the end of the swivel arm 18 which is pivotally mounted on a shaft 16 connected by a belt 21 to the shaft 19 and driven by a gear 17 engaging a gear 15 on a quill 13 connected by belts 14 to the unit 5. The control member is in the form of a cam ring 23 rotatable in the housing 10 by gearing 26 from the unit 5 and has an inwardly-facing track engaged by the tracing roller 25 which is carried on an arm 24 of adjustable length mounted on the swivel arm 18, a spring acting on the arm 18 to urge the roller 25 into engagement with the cam track. In operation, the tube is fed from the machine 1 through the cutting head 4 until its leading edge actuates a control device to cause the clamps 8 to engage the tube so that the head travels with the tube along the beams 3. When the head is moved, the rotor 12 is rotated by the gear 27 and the tracer roller 25 moves from a recess 29 in the cam ring to cause the cutter to engage the tube. As the cutter moves in a planetary movement around the tube, the cam ring is moved a short distance in the same direction so that the cutter moves through more than 360 degrees before the tracer roller re-engages the recess 29 to disengage the cutter from the tube. The clamping devices 8 are then released to permit the cutter head to be returned to its initial position.
Patent GB-1515204-A (GB)
Title: Method and device for controlling the pressure of a working medium delivered by a compressor
IPC: G05D16/20
Filed: 1976-06-08
Abstract: 1515204 Control of electric motors driving compressors ATLAS COPCO AB 8 June 1976 [23 June 1975] 23596/76 Heading H2J A device for controlling the pressure of a working medium delivered by a compressor driven by an electric motor comprises means to sense the pressure, means to stop the motor and regulating means operative to actuate the stopping means to stop the motor in response to a predetermined pressure level being sensed by the sensing means, providing the loading time of the compressor does not exceed a first predetermined value, and incorporating first delay means to define a predetermined time during which the regulating means prevents the stopping means from stopping the motor again if the predetermined pressure level is sensed again during the predetermined time.
Patent GB-917491-A (GB)
Title: Improvements in or relating to core-making
Inventor: TURNER ARNOLD
IPC: B22C9/10
Filed: 1960-07-06
Abstract: 917,491. Cores. WALMSLEYS (BURY) Ltd. Sept. 29, 1961 [July 6, 1960], No. 23602/60. Class 83 (1). A core comprises a number of interconnected sections each accommodating bricks and loam or other like coreforming materials, interconnections between some of the sections being releasable whereby the sections may be split into two or more groups each of which can be collapsed on itself for removal from within the casting. The sections 10 form two groups, the sections of each group being pivotally connected through lugs 11, and the two groups being releasably connected by taper pins through lugs 12, 13 on the end sections 10a, 10b. The sections contain refractory bricks 14 and after assembly loam is applied to the exterior and dressed by a sweep 17, Fig. 7. After drying the core is mounted in the casting pit, a quick release bracing mechanism applied centrally across the interior and the taper pins removed from the lugs 12, 13. After casting the bracing mechanism is removed, and one group 10, 10a (uppermost in Fig. 1) removed by lifting by ropes attached to lugs 21 from a central suspension point so that the sections tend to collapse about their interconnecting pivots. Thereafter the second group of sections 10, 10b is collapsed in similar manner and removed. In the production of long cylinders a number of cores may be arranged one on top of another.
Patent GB-665556-A (GB)
Title: Improvements in or relating to the cooling of cylinders of internal combustion engines
IPC: F01P7/08
Filed: 1948-09-08
Abstract: 665,556. Cooling cylinders. STEVENS, A. H. (Eaton Manufacturing Co.). Sept. 8, 1948, No. 23616/48. Class 7(ii) [Also in Group XIII] A radiator fan is driven from the engine through an eddy-current electromagnetic clutch, the current for which is supplied through a variable resistance 58 operated by a thermallyresponsive element 50 placed in substantially the coolest point of the circulation system. As shown, the element 50 is in a pipe 26 connecting the discharge end of the radiator with the cylinder block. The element 50 and a bellows 50<SP>1</SP> are filled with methyl alcohol or other expansible liquid, and an insulator 72 thereon lifts a contact 66 on to a plug 60 which compresses a pile of carbon discs 58 and thus adjusts the resistance, and the initial setting is adjusted by a screw 70. Specification 603,132 is referred to.
Patent GB-1352948-A (GB)
Title: Machine and a tool for honing gears
IPC: B23F21/03
Filed: 1971-04-19
Abstract: 1352948 Gear honing; abrasive tools C W GEHRING 19 April 1971 [12 March 1970] 23701/71 Headings B3B B3D and B3K Straight or inclined spur gear honing is by engagement of a workpiece (13) by one or more honing tools each comprised by a straight spur rack 12, the workpiece being rotationally oscillated along with longitudinal reciprocation of the rack, and the workpiece additionally being axially reciprocated. Rack reciprocation may be derived from workpiece oscillation or vice versa. For crowned teeth, the rack may additionally be given short, variable and adjustable, oscillations about an axis normal to the rack length direction and the workpiece axis. As shown, the workpiece is carried by a spindle 8 which is rotationally oscillatable, and, by a drive 7, reciprocated with respect to a carriage 5. A carriage 5 is itself hydraulically vertically movable to cater for wide face workpieces. Two parallel racks 12 are each longitudinally displaceable, mechanically or hydraulically, in bearings 11 supported via a carrier 14 on a carriage 10 adjustably slidable, mechanically or hydraulically, on rails 9. For inclined teeth workpieces, the carrier 14 is inclined about a pivot on an axis normal to the rack length direction and the workpiece axis. As shown, the rack comprises alternating sections 16, 17, each section 16 being provided with at least one tooth  and the sections 17 forming the tooth space lands. Each of the teeth 15 has its crest and flanks covered with an abrasive material sheath 19. Alternatively, the sections 16, 17 may be carried on a strip. Preferably the sections 16, 17 are longitudinally clamped, as by screws.
Patent GB-750920-A (GB)
Title: Improvements in or relating to the preparation of new steroid substances
Inventor: CORNFORTH JOHN WARCUP
IPC: C07J71/00
Filed: 1953-08-28
Abstract: The invention comprises compounds of the formula <FORM:0750920/IV(a)/1> (where X is hydrogen or bromine, and R is a hydroxyl group or an esterified hydroxyl group) and a process for their preparation by treating the corresponding 11a -bromo-12a -hydroxy compounds in which X is bromine with zinc and an aliphatic acid containing from 2-6 carbon atoms.  Elimination of the 23-bromine atom occurs only when vigorous debromination conditions are used. The 11 : 23-dibromo-12a -hydroxy intermediates are prepared from the corresponding 12-keto compounds by reduction with lithium aluminium hydride (preferably in ether at 0 DEG  C.) or with sodium borohydride (e.g. in aqueous ethanol, dioxan, ethyl acetate or methylene chloride/ethanol), yielding a mixture of 12a - and 12b -hydroxy epimers, which may be used directly or the required 12a -epimer separated by chromatography or alumina.  A 3-acyloxy group may be hydrolysed during the reduction and re-acylation is then desirable prior to the debromination step.  In examples (1) 11a  : 23-dibromohecogenin acetate is reduced with lithium aluminium hydride in ether, and the crude reduction product is esterified with acetic anhydride/pyridine and warmed with zinc powder and acetic acid to produce 3b -acetoxy - 23 - bromo - 5a  - 22a - spirost - 11-ene; (2) 11a  : 23-dibromohecogenin acetate is reduced with sodium borohydride in aqueous ethanol containing sodium bicarbonate, and the crude product is heated with zinc dust in boiling acetic acid to give 3b -acetoxy-5a -22a-spirost-11-ene; (3) as in (2) except that the crude reduction product is chromatographed on alumina to isolate 3b -acetoxy-11a  : 23-dibromo-12a  - hydroxy - 5a  - 22a - spirostane from the mixture of isomers obtained; (4) the product of (2) is hydrolysed by refluxing with aqueous ethanolic caustic soda, yielding 3b -hydroxy-5a -22a - spirost - 11 - ene; (5) the product of (1) similarly yields 3b -hydroxy-23-bromo-5a -22a-spirost-11-ene.
Patent GB-406363-A (GB)
Title: Improvements in or relating to can body machines
IPC: B23K1/16
Filed: 1932-08-26
Abstract: 406,363. Making cans. FARRER, J. O., 27, Chancery Lane, London.-(Continental Can Co., Inc. ; 100, East 42nd Street, New York, U.S.A.) Aug. 26, 1932, No. 23886. [Classes 83 (ii) and 83 (iv).] Soldering.- The wiper for removing excess solder from the longitudinal seam of a can is movable by a cam to and from the can as it passes thereover to compensate for the longitudinal curvature of the body duo to warping. The invention is described with reference to a machine in which flat blanks are fed to a notching, bending, and seaming mechanism, conveyed therefrom by lugs 32 on a conveyer chain 3 through the soldering and wiping mechanism, and then passed over a cooler tube from which air is discharged thereon. Solder is applied from a pot 5 by a rotating roller 6 to the bodies 2, which then pass along the horn 4 and over a wiper 35, the horn being recessed at 90 to prevent solder being collected on the horn from the wiper. The wiper, which may be formed of flannel discs, is rotatably supported on an arm 37 and is driven from a shaft 46 through chain and sprocket gearing. The arm 37 is moved by oscillation of its supporting shaft 38 during the passage of a can 2, Fig. 3, to follow the slightly curved side seam, by a cam surface 62, 63 engaging a roller 51 carried in one of a series of holes 50b on a lever 50 mounted on the shaft 38 and adjustably secured by a screwed member 69 to a lever 68 keyed to the shaft, and held downwardly by a spring 65. The cam is reciprocated once during the passage of a can by a crank disc 61 and links 59, 55, 54.
Patent GB-1534466-A (GB)
Title: Testing of digital transmission systems
IPC: H04L27/00
Filed: 1977-06-08
Abstract: 1534466 Testing repeaters WESTERN ELECTRIC CO Inc 8 June 1977 [14 June 1976] 24047/77 Heading H4P Defective repeaters in a multihop, digital transmission system; information being transmitted in differentially coded phase shift keying (DCPSK); are located by the use of a special test pattern, S, which is generated at the transmitting terminal S, the signal S, and the same signal delayed by N symbols S(N) being applied directly to the inputs of carrier phase modulator 17. At each repeater, the test signals are extracted from phase demodulator 22, one of them is delayed by N symbols in unit 53, the delayed and undelayed signals being applied to EOR 54. The test pattern has the property that it is equal to its own complement, delayed by 2N symbols, so that, whatever the phase state of the carrier, the signals fed to EOR 54 are equal in the absence of errors, so that errors can be determined simply by counting output pulses from EOR 54. Because no differential decoder is required in the test apparatus 71 at each repeater station, as compared with the known arrangement, Fig. 1 (not shown), wherein a test pattern is differentially encoded at the transmitter before passage to the modulator. An error counter arrangement, Fig 3 (not shown) wherein error pulses set a monostable (81) may give visual indication of errors during test pattern reception.
Patent GB-223558-A (GB)
Title: Improvements in pumping attachments for oil-well rigs
IPC: F04B47/02
Filed: 1924-10-10
Abstract: 223,558. Fetty, C. C., and Ramsey, G. Le R. Oct. 17, 1923, [Convention date]. Lever-actuated pumps; gear-wheel actuated pumps.-The pump of an oil-well rig is driven from the hand-wheel 4 by a gear-wheel 8 gearing with a planetary wheel 13 which is rigidly connected to the pitman 14 actuating tihe beam 3 of the pump. The wheel 8 may consist of a hub 9 carrying two toothed discs 10, 10' engaging similar discs 12, 12<1> on the wheel 13. The wheels 8, 13 are connected by two removable yokes 25, 26 and two rods 23, 24. The teeth on the wheels 8, 13 are shrouded to their pitch lines 30, 31 to form rolling surfaces 32, 33.
Patent GB-1019863-A (GB)
Title: Fluorescent lamp circuits
Inventor: CHAPMAN DONALD FREDERICK
IPC: H05B41/232
Filed: 1964-06-10
Abstract: 1,019,863. Supply systems for gas discharge apparatus. THORN ELECTRICAL INDUSTRIES Ltd. June 10, 1964, No. 24134/64. Heading H2H. [Also in Division H1] A circuit arrangement of the semi-resonant type for the operation of electric discharge lamps includes a ballast unit having two primary windings P1, P2 connected in series between a supply terminal 10 and a filament 12 of the lamp 13 and two secondary windings S1, S2 connected in series with a capacitor C between the two filaments 12, 14 of the lamp.' The primary and secondary windings are wound on a four-limbed core 15, 16 having air gaps between the limbs. The reactance values of the components are such that the circuit develops the necessary starting voltage and after ignition of the lamp the voltage is reduced to the normal operating value. The coils P1, S1 may be wound on a common former as may be the coils P2, S2.
Patent GB-722699-A (GB)
Title: Improvements in self-adjusting hydraulic devices for taking up slack between mechanical parts
IPC: F01L1/245
Filed: 1953-09-01
Abstract: 722,699. Valve gear. DAIMLER-BENZ AKT.-GES. Sept. 1, 1953 [Sept. 1, 1952], No. 24179/53. Class 7 (6). [Also in Group XXIV] In a hydraulic clearance adjusting device, particularly a valve-operating tappet, of the type comprising two telescopic parts 1, 2, urged apart by a spring 3 and having a non-return valve 14 permitting liquid to flow from a reservoir chamber 17, enclosed in a flexible sleeve 4 connected to the two parts 1, 2, to the pressure space 15 and preventing liquid escaping from the space 15, each of the parts 1, 2, is formed with a collar 7, 8, providing an abutment surface for engagement by the associated end of the sleeve 4 and sheet metal rings 9, 10 fit tightly over the collars 7, 8 and the ends of the sleeve. Rims 5, 6, on the ends of the sleeve 4 are forced into grooves on the parts 1, 2, and air vents 18 connected to the top of the reservoir 17 permit air to escape therefrom when the device is filled with liquid through an aperture normally closed by a screwed plug 11.
Patent GB-1263392-A (GB)
Title: Sustained release drug composition
IPC: A61K9/22
Filed: 1969-05-13
Abstract: 1,263,392. Sustained-release medicaments. AMERICAN HOME PRODUCTS CORP. 13 May, 1969 [21 May, 1968; 13 Feb., 1969], No. 24256/69. Heading A5B. A delayed or sustained-release medicament is made by mixing together a drug a carboxy vinyl polymer and polyethylene glycol (P.E.G.) and tableting this mixture together with conventional tablet ingredients. Suitable carboxy vinyl polymers are acrylic acid polymers crosslinked with 0.75 to 2% of a polyallyl ether of sucrose having an average of about 5.8 allyl groups per molecule of sucrose. Suitable P.E.G.'s are those of molecular weight 1000 to 20,000 especially 4000 to 6000. Reference is made to compositions containing numerous known drugs.
Patent GB-586378-A (GB)
Title: Improvements in or relating to model and man carrying gliders, flying machines and the like
IPC: B64C3/00
Filed: 1944-12-05
Abstract: 586,378. Aircraft wing structures. PIDCOCK, C. W. Dec. 5. 1944, No. 24260. [Class 4] A. model or man-carrying glider, aeroplane, or kite comprises a main wing surface a of flexible material formed by substantially rectangular portions joined together at an angle to form aii obtuse angled swept back leading edge and a stiffening or reinforcing member j extending along the leading edge and along the centre line from the leading to trailing edge, the leading edge being formed of straight line portions h, i, having different angles of inclination to the centre line of the wing. The inner portions of the wing may be bent anhedrally or dihedrally along the centre line c-c, and the outer wing portions bent dihedrally or anhedrally along rearwardly converging lines k-k. In addition, the inner wing portions may be bent' along lines passing through the apex of the leading edge and diverging rearwardly.
Patent GB-1523591-A (GB)
Title: Product
IPC: A23G9/46
Filed: 1974-05-31
Abstract: 1523591 Iced beverages UNILEVER Ltd (IN PART LANGNESE - IGLO GmbH D J ADAMS and J R RAVENHILL) 17 July 1975. [31 May 1974 (2) 3 Oct 1974 (2)] 24273/74 24274/74 42984/74 and 42985/74 Heading A2B A cold flavoured drink is prepared by adding an aqueous liquid to a frozen concentrate which is a water ice having an overron greater than 50%. The concentrate may particularly be a coffee or tea concentrate to produce ice tea or coffee. The water ice may contain 25-40% sugar, a stabiliser e.g. 0.04-0.07% of guar gum or locust bean gum, an oil and a protein.