baber/WOPTO huggingface dataset:
Patent GB-1226880-A (GB)
IPC: H01L29/00
Filed: 1968-11-12
Abstract: 1,226,880. Making semi-conductor devices. TOKYO SHIBAURA ELECTRIC CO. Ltd. 12 Nov., 1968 [21 March, 1968], No. 53477/68. Heading H1K. During the formation of a groove from the surface of a semi-conductor body towards an underlying reverse biased PN junction the removal process is such that the walls of the groove are damaged and rendered appreciably conductive so that a sudden change in bias circuit conditions occurs when the groove reaches the depletion layer associated with the junction; the process, which is monitored by meter or oscilloscope, is manually or automatically terminated at this point. The process may be applied to a PN body for a rectifier, to a PNP body-here an upper junction is forward biased and does not control the process, and to more complex bodies. A desired groove depth may be selected by appropriate choice of bias voltage and consequently of width of depletion zone. Removal of material may use aluminium or silicon carbide particles entrained in gas, inert liquid, or chemical etchant. The nozzle configuration used determines the groove shape. Reference is made to processes in which the nozzle is set perpendicular to or inclined to the surface treated (the PN junction being parallel to this surface) and to processes in which there is no relative movement between nozzle and substrate, but the claims are directed to the case in which a slanted annular groove is formed by using a nozzle inclined to the surface and off-centred from an axis perpendicular to the junction and about which the body is rotated.
Patent GB-1227313-A (GB)
IPC: C09J7/21
Filed: 1967-03-04
Abstract: 1,227,313. Coated wall covering. J. & J. MAKIN Ltd. 26 Feb., 1968 [4 March, 1967; 18 March, 1967; 22 April, 1967; 13 May, 1967; 5 July, 1967], Nos. 10357/67; 12828/67; 18634/67; 22292/67 and 30848/67. Heading B2E. A readily-strippable wall covering has a fibrous backing surface which has been treated with a vinylidene chloride copolymer to reduce the susceptibility of the covering to adhere to a wall upon the subsequent application of a water-based adhesive to said copolymer prior to offering up said wall covering to the wall, the amount of copolymer applied being sufficient to reduce but not eliminate the adhesive bond between the wall and the fibrous backing surface. The copolymer may be applied as a discontinuous pattern such as a micro-dot pattern or it may be applied discontinuously and irregularly over the fibrous backing surface. Decorative, advertising or instructional matter may be printed on the facing surface before or after the application of the vinylidene chloride copolymer. The copolymer layer may be applied by printing, coating, spraying, immersing, gravure roll, size press, air knife, roller, silk screen printing with or without a stencil or case coating. The vinylidene chloride copolymer may be thickened with polyvinyl alcohol.
Patent GB-1227640-A (GB)
IPC: B44B5/00
Filed: 1969-10-06
Abstract: 1,227,640. Embossing. L. A. MINTZ. 6 Oct., 1969 [7 Oct., 1968], No. 49047/69. Heading B6J. Work carried on a support 10, Fig. 1, is embossed by means of a heated die 29 carried on a stamping head 21 on a ram 22 which is urged upwardly by springs and forced downwardly by a wedge 37 forced by a pneumatic cylinder device 44 between a stationary reaction roller 39 and a roller 38 carried by the ram, the direction of movement of the wedge being at a small angle with respect to the perpendicular to the path of the ram. The ram is first moved downwards to a position close to the work at a high speed but with the air pressure low by means of a surface 48 of the wedge, so that the pressure component on the roller 38 horizontally does no damage, and is then moved into contact with the work at a low speed but at high pressure by means of a surface 49 of the wedge extending at a small angle to the direction of movement of the wedge, so that the horizontal pressure component on the roller 38 is small. The spring force urging the ram upwardly can be released by manually rotating a pair of levers supporting the springs, to allow manual movement of the head 21 for setting up the work on the table 10, or the head can be manually lowered by a lever 97. The table 10 is vertically adjustable by a screw 17. The work may be stamped through a foil 30, Figs. 1 and 4, which is fed at each stroke of the ram by a feed roller 69 driven by a further pneumatic cylinder through two reciprocating racks engaging two gears through one-revolution clutches in such a way that on each stroke of the cylinder in either direction, the roller is driven in the same direction. A counter-roller 70 is urged against the roller 69 by a cam 74 and leaf spring 71, but can be released by rotating the cam.
Patent GB-1227966-A (GB)
IPC: H05B41/231
Filed: 1968-07-22
Abstract: 1227966 Control circuits for discharge lamps BERKEY PHOTO Inc 22 July 1968 [25 July 1967] 34859/68 Headings H2J J1U J1D1 J1X J5 J7AandJ7C A motor controlling an air blower for cooling a discharge lamp, is inoperative during the warming- up period of the lamp, driven at a slow speed when the lamp is in operation, and driven at a higher speed to cool the lamp quickly after the latter is de-energized. In the embodiment shown, operation of a manual switch 19 automatically closes main switches 14 to energize a starting circuit, including a switching diode 49 and a capacitor 52, which supplies pulses to a starting transformer 36. After a few seconds, the lamp 31 will have ignited and the starting circuit is broken by a slow-acting relay 56, 47. After a delay of about a minute, a relay 77 closes a switch 74 to connect the blower motor 65 to a tapping 29 on an autotransformer 24. The lamp is now cooled at a rate which maintains it at its optimum working temperature. During operation of the lamp, a switch 80 is closed by the action of a relay 82. When the lamp is switched off, relay 77 is de-energized, thereby connecting the blower motor 65 with the full supply voltage by way of switch 80 which is held closed for a period of about a minute by the discharge of a capacitor 94 through the relay 82. The lamp is thus rapidly cooled down to facilitate restarting.
Patent GB-1228576-A (GB)
IPC: B65G59/10
Filed: 1967-08-17
Abstract: 1,228,576. Feeding from nested stack of articles. CADBURY BROS. Ltd. 30 July, 1968 [17 Aug., 1967], No. 37941/67. Heading B8S. A tray 10a is separated from a stack 10 of interengaged trays, supported between pairs of grippers 11, by a suction head or paddle 18 provided with plunger members 23 operable to support the base wall of each tray against deformation by the suction. The face 18 of the paddle is moved into a position adjacent the lip of tray 10a thus opening grippers 11 and suction is applied to chamber 21 causing the tray to be attracted to the paddle by withdrawal of air through slot 19 of the paddle. Simultaneously, diaphragm 24 is deformed, moving plungers 23 into contact with the portions of the bore wall of the tray. Removal of the paddle releases grippers 11 to once again support the stack. The separated tray may then be removed from the paddle by establishing atmospheric or greater than atmospheric pressure in chamber 21. As applied to the removal from a stack, of trays shaped to define supports for a plurality of differently shaped chocolates a plurality of plungers 23 may be provided to coincide with any thin, easily deformable portions, of the base wall of a tray.
Patent GB-1228863-A (GB)
IPC: B23Q17/22
Filed: 1968-05-07
Abstract: 1,228,863. Setting-up machine tools. TAREX S.A. 7 May, 1968 [12 May, 1967], No. 21636/68. Headings B3B and B3T. Apparatus for use in setting up a machine tool such as a lathe having a turret 6 and a copying device 12 comprises a frame 13 carrying sliding elements 15, 17, 21 which correspond respectively to the turret slide 5, copying slide 11 and rear slide (not shown) of the lathe and which precisely simulate the movement thereof, a table 22 on which is positioned a drawing 23 of the component to be produced in the machine and a pantograph device having a parallelogram linkage 25, 29, 30 and which carries a pointer 37 at one joint and a gauge stop member 40 at a corresponding joint. In operation an actual tool or holders e.g. turret 6 and copying tool 12, are mounted in locations 15a, 68, on the respective elements, the pointer 37 is located in a selected position on the drawing for each tool holder and the tool brought into abutment with the gauge pin 40 by the movement of the respective sliding element, the tool holders being subsequently transferred to their respective slides in the lathe whereat they occupy the position required in use. The turret 6 is secured in the housing location 15a on the sliding member 15 and is hand indexable by way of a pin 52 engaging in selected peripheral holes, whereby each turret tool in turn is brought into engagement with the gauge pin 40. The turret slide stop bars 8 are also preset at the same time as their respective tools, by location on the slide 15 by a clamp member 55, the stop bars being adjusted in relation to a stop 57 on the slide 15. The pantograph has a 1: 1 ratio of movement but it is stated that other ratios may be used depending on the scale of the drawing.
Patent GB-1233004-A (GB)
IPC: C08J9/00
Filed: 1967-06-13
Abstract: 1,233,004. Weldable polyurethane foams. J. P. BRENNAN. 20 May, 1968 [13 June, 1967], No. 27324/67. Headings C3C, C3R and C3P. A weldable polyurethane foam of the kind based on the reaction of polyether polyols and/or polyester polyols with polyisocyanates is made by incorporating in the foam-forming composition prior to foaming a thermoplastic component which is substantially inert to the ingredients of the composition and of which at least 10% by weight is ethylene/vinyl acetate copolymer. The thermoplastic component may consist of ethylene/vinyl acetate copolymer, or may include polyethylene, polyvinyl acetate, acrylate homopolymers and copolymers, e.g. a butyl acrylate/vinyl isobutyl ether copolymer, and/or copolymers derived from caprolactam, hexamethylene diammonium adipate, and p,p<SP>1</SP>- dicyclohexylmethane diammonium adipate. In the examples the foam-forming composition comprised a polyether polyol or polyester polyol derived from dimerized fatty acid, water, a silicone foam stabilizer, stannous octoate, toluene diisocyanate, and as catalyst dimethylaminopyridine or triethylene diamine.
Patent GB-1239204-A (GB)
IPC: H01J29/66
Filed: 1967-10-04
Abstract: 1,239,204. Superconductor magnets; discharge apparatus. BRITISH OXYGEN CO. Ltd. 3 Oct., 1968 [4 Oct., 1967], No. 45277/67. Headings H1D and H1P. An electromagnet comprises a tubular support having at least one longitudinally extending former on the external surface, the former having enlarged end portions the radii of curvature of which are nowhere less than the minimum radius of curvature to which a superconductor strip may be wound, the superconductor strip being wound on to the former with the adjacent turns separated by thin spacers at the end portions of the former and by thick spacers at the intermediate portions of the former. As shown, Fig. 4, the tubular support is provided with a former 6 having bulbous ends 20. Layers 8 of superconductor are wound round the former with thick spacers 12 over the straight portions and thin spacers 22 over the curved portions. The superconductor may be a ribbon of stainless steel coated with Nb 3 Sn and the spacers may be of non-magnetic stainless steel. A quadrupole magnet for focusing a beam of charged particles may be produced by providing the tubular support with four such coils spaced around its circumference. The thickness of the spacers over the straight portions of the former may be varied so that the outer turns of the coil are closer together than the inner turns. If in winding the coil a point is reached at which the straight portion of the turn is tangential to the curved end part any subsequent turns are wound with spacers of constant thickness over the straight and curved parts of the former. The spacers may have radially tapered cross-sections. The magnet may also be employed for separating the magnetic and non-magnetic fractions of ores and minerals.
Patent GB-1251139-A (GB)
IPC: F23Q1/02
Filed: 1969-09-29
Abstract: 1,251,139. Igniting gas lamps; gas mantles. P. KREIS. 29 Sept., 1969 [15 Oct., 1968], No. 47767/69. Headings F4F and F4T. A gas lamp has a housing 1, an incandescent mantle 2, and flint ignition device 3 having an operating spindle 9 which extends downwardly and carries an operating knob 10 outside the housing 1.
Patent GB-1251748-A (GB)
IPC: G05F3/06
Filed: 1969-07-09
Abstract: 1,251,748. Converting. MARCONI CO. Ltd. 16 April, 1970 [9 July, 1969], No. 34623/69. Heading H2F. An arrangement for supplying D.C. power to a load 19 from an unregulated D.C. source 1 comprises a switching arrangement 2, the output of which feeds the primary winding of a transformer 4 by way of a series resonance circuit 8, 9 and a parallel resonance circuit 10, 11; the secondary winding of the transformer 4 having multiple taps each tap feeding a load 19 by way of a different rectifier in the block 4 and a low-pass filter circuit 16, 17, 18, the circuits 8, 9 and 10, 11 being arranged to resonate at the switching frequency of the switching arrangement 2. The output of the switching arrangement 2 has a rectangular waveform which is changed to a sinusoidal waveform by the resonant circuits, the Q- values of the two circuits being equal and not more than 3. The series resonance circuit 8, 9 is shunted by a resistor 12 which has a value equal to the equivalent load resistance referred to the primary winding of the transformer 4. The value of the resistor 17 in the filter circuit 16, 17, 18 is chosen to be equal to the equivalent resistance of the load 19. The switching arrangement may comprise semi-conductor devices, thermionic valves or relays.
Patent GB-1257053-A (GB)
IPC: F23D14/06
Filed: 1969-01-09
Abstract: 1,257,053. Gas burners with flame retention means. RADIATION Ltd. 9 Jan., 1970 [9 Jan., 1969], No. 1390/69. Heading F4T. In a gas burner having main flame ports 10, a lip 2 is provided over a retention flame port 6 to prevent blockage thereof. As shown, the lip 2 is formed on a ring 1 sandwiched between a burner base 5 and a cap 9 to define the flame ports 6, 10. At starting some of the gas passes via a bore 8 and a flash tube (not shown) to a standing pilot (also not shown), the resulting ignition flame traversing a slot 8a in the base 5 to the flame ports 6, 10.
Patent GB-1258451-A (GB)
IPC: C21C7/00
Filed: 1969-03-21
Abstract: 1,258,451. Removing inclusions from steel. BRITISH STEEL CORP. June 18, 1970 [March 21, 1969], No. 15141/69. Heading C7D. Suspended non-metallic inclusions are removed from molten steel by bubbling through it a mixture of CO and CO 2  while the bath is covered with a slag layer, the gas flow being such as to avoid slag entrapment. The gases may be introduced through a lance or through a porous plug in the base of the ladle, the rate of flow being preferably within the range ¢ to 20 cu. ft. per minute, and the volume in the range 0À05 to 3 cu. ft. per ton of metal.
Patent GB-1265291-A (GB)
IPC: B25J3/04
Filed: 1970-01-01
Abstract: 1,265,291. Fluid-pressure servomotor systems. GENERAL ELECTRIC CO. Jan. 1, 1970 [Jan. 2, 1969], No. 52/70. Heading G3P. A control system comprises a controlled member 12 responsive to the movements of a control member 10, sensing means 36, for producing a signal representative of the force applied to an object by the controlled member, and actuating means 25, 26, 27 connected to the control member and responsive to the signal to provide "feel". The sensing means has three elements 37, 38 and 39 to sense force along mutually perpendicular co-ordinates and each of the signals from the elements is applied to a respective piston and cylinder actuator on the control member. Each element when nulled provides a pressure signal equal to one half of the source pressure and the rod side of each actuator piston is one-half the area of the other side so that the piston exerts no force when no force is being sensed by the element. The signal from each element is produced by a spool valve 90 centred by springs 93, 94 and adjusted by a nulling screw 95 in a chassis member 53 movable relatively to a frame member 51 and provided with roller bearings 81 engaging slots 80, the relative movement being communicated to the valve through an eccentric lever arm 105. The chassis and frame members are interconnected by a piston 58 centred by springs and having its opposite faces in communication through a spring-loaded valve 72 and an adjustable orifice 68 to provide damping. In an alternative embodiment, the relative movement adjusts a potentiometer to provide an input signal to an electrohydraulic valve.
Patent GB-1289384-A (GB)
IPC: C08F279/02
Filed: 1970-02-06
Abstract: 1289384 Graft polymerization process DAICEL Ltd 6 Feb 1970 [8 Feb 1969] 5789/70 Heading C3G A process for preparing a high impact resin comprises dissolving or mixing a first quantity of an elastomer in a monovinyl aromatic monomer or a mixture thereof with a comonomer, subjecting the solution or mixture to an initial bulk polymerization step until 10 to 50% by weight of the monomer or monomer mixture has been converted to polymer and phase inversion has occurred, adding to and uniformly mixing in the system a second quantity of an elastomer, consisting of an aqueous latex of a butadiene elastomer and a coagulant therefor, and subjecting the resulting system to polymerization in aqueous suspension. In examples, (a) a solution in styrene and acrylonitrile of a butadiene-styrene elastomer, polybutadiene or ethylene-vinyl acetate elastomer is prepolymerized in bulk, a latex of butadiene rubber and a coagulant, e.g. HCl or CH 3 COOH are added, polymerization is continued in bulk and then completed in suspension; (b) as (a) except that a butadiene rubber is used in the first stage and a butadiene-styrene rubber latex is added later; and (c) a solution in styrene, acrylonitrile and methyl methacrylate of a butadiene-styrene rubber is subjected to bulk polymerization and a latex of a similar rubber is added before the suspension polymerization stage.
Patent GB-1289535-A (GB)
IPC: B01J31/04
Filed: 1969-09-24
Abstract: 1289535 Glycol esters HALCON INTERNATIONAL Inc 24 Sept 1969 [26 Sept 1968] 47069/69 Heading C2C Glycol esters of carboxylic acids are prepared by contacting an ethylenically unsaturated compound containing at least three carbon atoms with a carboxylic acid and oxygen at an elevated temperature in the presence of (a) at least one halogen selected from bromine and chlorine, and bromine or chlorine compounds producing bromide or chloride ions in solution and (b) at least one source of variable valence metal cations selected from Te, Ce, Sb, Mn, As and Co. The halogen may be as such, or as acid, or as alkali or alkaline earth metal salt or may be provided by the variable valence metal present as bromide or chloride. Many carboxylic acids such as mono- or di-aliphatic acids, alicyclic monocarboxylic acids, heterocyclic acids and aromatic acids are listed and alkenes, aralkenes and cycloalkenes may be the ethylenically unsaturated compounds, e.g. propylene, butene-2, 2-methylbutene-2 or allyl acetate and others are listed. The carboxylic acid may be used as a solvent for the reaction. Examples describe the reaction of propylene, butene-2, 2-methylbutene-2, allyl alcohol, heptene-2, pentadecene- 1, 1,3-butadiene, styrene, and cyclopentene with acetic, caproic, palmitic, succinic, chloropropionic, cyanoacetic, methoxyacetic, 3- methylthiopropionic, benzoic, p-toluic, 2-naphthoic, m-chlorobenzoic, o-nitrobenzoic, salicylic, p - hydroxybenzoic, m - aminobenzoic, phenylacetic, 2-phenylbutyric, 1-naphthaleneacetic, hexahydrobenzoic, picolinic, nicotinic, 3-indoleacetic, furoic, 2-thiophenecarboxylic and quinolinic acids with varying cations and halogen sources.
Patent GB-1295134-A (GB)
IPC: A61C1/18
Filed: 1970-04-24
Abstract: 1295134 Flexible shafts O MUSS 24 April 1970 [24 April 1969] 19743/70 Heading F2U A drive for interchangeable dental tools includes a flexible shaft 2 (e.g. with a sheath 1) having at an end a cone coupling 4, 5 connecting it to a tool drive element 6 disposed in a sleeve 14, the cone coupling being disconnectible by a control element 25 outside the sleeve. The sleeve 14 may be screwed on to a sheath connection 24 and have helical slits 20, 20a in which slide pins 26, 28 on the element 25 twistable to axially move a ball-bearing 12 and with it part 4 of the coupling. There may be Belleville springs 19 between the pin 28 and the bearing 12 to hold the pin in a nick 22 at the end of the slit. To prevent attachment or removal of tools when the coupling 4, 5 is connected, an end of the element 25 engages under a handle 9 depressing a hook 10.
Patent GB-1297284-A (GB)
IPC: A01J5/12
Filed: 1970-02-12
Abstract: 1297284 Milking machine pulsators. WARTSILA Ab Oy 12 Feb 1970 [13 Feb 1969] 6744/70 Heading AIM [Also in Divisions G3 and F2] In a pulsator wherein a hollow reciprocating piston rod 2 interconnects two identical pistons 1, each of which pistons carries a diaphragm 3 defining a closed, fluid containing space 4, damping of the reciprocatory motion of the rod 2 is effected by inserting a grooved plug 6 into one end of the piston rod bore 5, which bore is of smooth cylindrical form, such that the plug groove acts in conjunction with the bore 5 to provide a throttling passage 8. The plug is formed with a blind axial bore 10 which facilitates the insertion and subsequent retention of the plug 6 within the piston rod 2, and the bore 5 is enlarged as at 9 such that the length of the throttling passage may be varied by altering the degree of penetration of the plug 6 within the bore 5. In a modification, not shown, the plug is formed with a smooth outer surface whilst the bore is grooved.
Patent GB-1297367-A (GB)
IPC: C07C51/42
Filed: 1970-04-28
Abstract: 1297367 Separating mono- and di-neo carboxylic acids BP CHEMICALS Ltd 19 April 1971 [28 April 1970] 20318/70 Heading C2C Di-neo acid is separated from co-produced mono-neo acid by adding to the protonated di- and mono-neo acids dissolved in a strong acid a quantity of water sufficient to give a molar ratio of water + twice the di-neo acid (+ formic acid, where present) : strong acid of from 0À5:1 to 1:1 to liberate the mono-neo acid, separating the mono-neo acid from the partially diluted strong acid, and adding water to the partially diluted strong acid to give a molar ratio of water (+ formic acid, where present) : strong acid of at least 1À3:1 to liberate the di-neo acid.