baber/WOPTO huggingface dataset:
Patent GB-1191145-A (GB)
Title: Semiconductor Devices Including an n-Type Gallium Arsenide Substrate and Methods of Making Ohmic Contacts thereto
Inventor: KLEIN DONALD LEE
IPC: C30B19/06
Filed: 1967-06-07
Abstract: 1,191,145. Semi-conductor devices. WESTERN ELECTRIC CO. Inc. 7 June, 1967 [8 June, 1966], No. 26187/67. Heading H1K. An N-type GaAs body 21 having a net donor concentration of 10<SP>16</SP> atoms/c.c. or less has an ohmic contact applied thereto comprising an N<SP>++</SP> layer 22 of GaAs having a net donor concentration of the order of 10<SP>20</SP> atoms/c.c., with a metal layer 23 thereon. The body 21 may itself be epitaxially grown on an N<SP>+</SP> GaAs substrate. The preferred method of applying the contact comprises growing the N ++  layer 22 epitaxially from a solution of tin saturated with GaAs (6-10 mole per cent GaAs) produced by melting together a mixture of tin and crushed N-type GaAs, by causing the solution to flow over the cleaned and etched N-type body 21 in a hydrogen atmosphere at 600‹ C., and then cooling. When the temperature reaches 500‹ C. the tin solution is decanted from the body 21 and further cooling takes place in nitrogen. Excess tin/GaAs is removed by heating the body under mercury covered with dil. HCl. The metal layer 23, which may consist of an In/Au alloy, is then formed, e.g. by evaporating In and Au on to the surface of the N<SP>++</SP> layer, and heating so as to alloy them. A tiltable sealed furnace is described for carrying out the epitaxial growth of the N<SP>++</SP> layer 22. This growth may take place through a mask on to a limited region of the body 21.
Patent GB-1284516-A (GB)
Title: Aminopropionyl derivatives of 2,3-diphenyl-cyclopropylamine
IPC: C07C/
Filed: 1971-04-19
Abstract: 1284516 2,3-Diphenylcyclopropylamine derivatives ZAMBON SpA 19 April 1971 [3 March 1970] 26191/71 Heading C2C Novel 2,3-diphenylcyclopropylamine derivatives of the Formula I: wherein R 1  is H or C 1-6  alkyl and R 2  is H, C 1-6  alkyl or benzyl or R 1  and R 2  together with the nitrogen atom to which they are attached form a heterocyclic ring and acid addition salts thereof are prepared by reacting novel halogen compounds of the Formula II: wherein Y is halogen, obtained by reacting 2,3- diphenylcyclopropylamine with compounds of the formula Pharmaceutical compositions, having anticonvulsive activity and activity in cardiac arrhythmias, contain the above novel 2,3- diphenylcyclopropylamine derivatives or acid addition salts thereof of Formula I and therapeutically acceptable carriers therefor.
Patent GB-221374-A (GB)
Title: Improvements in or relating to show cases and wardrobes for displaying and storing wearing apparel
IPC: A47F5/10
Filed: 1923-10-20
Abstract: 221,374. Sage & Co., Ltd., F. Sept. 18, 1923, [Convention date]. Sectional show-cases for displaying and storing wearing apparel. In cases of the kind comprising one or more units each of which is built up of component parts secured together by coupling devices such as hooks and sockets, each section or unit has a front frame, two skeleton ends secured to the front frame, and a panelled end at each extremity of the unit or range of units connected with the adjacent skeleton ends by hooks and sockets, and with the front frame by bridgepieces, Fig. 17. Pilasters covering the joints are secured to the bridge-pieces. Between adjacent units, the panelled ends may be omitted, and the two front frames secured together by bridgepieces. Suitable forms of hook are described, and the sockets and bridge-pieces may be of the kind described in Specification 183,679. As described, two back wall members (not shown) are secured to a base A, Fig. 4, by horizontallyengaging hooks and sockets, two skeleton ends E, Fig. 7, are lowered into place with their clips F entering sockets on the base, and hooks engaging sockets on the back wall members. The front frame G, Fig. 3, is then lowered into place with its clips F entering sockets on the base A, and its sockets engaging upturned hooks D<2> on the skeleton ends. The roof H. Fig. 1, is slid horizontally into place. Panelled ends (not shown) are lowered into position with their hooks engaging sockets on the skeleton ends. Bridge-pieces K, Fig. 17, are used to couple sockets on the front frames and panelled ends, and pilasters (not shown), to hide the joints are added, with their hooks engaging slots in the bridge-pieces. The front frames G are provided with hinged or, sliding sashes which may be glazed or panelled.
Patent GB-865493-A (GB)
Title: Improvements in or relating to spring electrical cords and methods of making them
IPC: H01B13/008
Filed: 1958-08-15
Abstract: 865,493. Self-coiling cables. WESTERN ELECTRIC CO. Inc. Aug. 15, 1958 [Aug. 29, 1957], No. 26324/58. Drawings to Specification. Class 36. A self-coiling cable is made by twisting the cable to form a helix, setting the helix by heat treatment, reversing the pitch of the helix and at the same time over-twisting the freshlyformed coil, and subsequently removing substantially all' of the over-twist from the cable. The pitch of the helix is preferably reversed by the method described in Specification 536,937.
Patent GB-602630-A (GB)
Title: Improved punch and die device
IPC: B21D28/34
Filed: 1945-10-09
Abstract: 602,630. Punches and dies. HUNTON, Ltd., WHITLAM, H. J., and BROWN, L. H. Oct. 9, 1945, Nos. 26344 and 26345. [Class 83 (iv)] Interchangeable punches 33 are secured by a nut 36 to a punch holder 30. A pilot pin 32 or a smaller punch may be inserted in the holder. A bolster plate 2 carries a recess 3 for locating a die directly or inserts 14, 16 in which a die 18 may be secured by screws 19, 20. The bolster may be provided with posts for guiding the punch.
Patent GB-621698-A (GB)
Title: Improvements in and relating to automatic burglar and fire alarms
IPC: H04M11/04
Filed: 1946-09-03
Abstract: 621,698. Phonographs. MOUNTSTEPHEN, E. R. Sept. 3, 1946, No. 26446. [Class 40 (ii)] [Also in Group XXXIX] In a fire, police, &c. alarm signal transmitter. comprising a gramophone adapted to be operatively connected to a telephone system upon occurrence of burglary or fire, the operation of the impulse transmitter, the lowering of the sound box and the return of the sound box to the commencement of the record to repeat the message, are controlled by a cam on the spring drum of the gramophone motor. The cam 7 on the drum 8 engages in sequence three levers 9, 10, 11, horizontally mounted one above the .other upon a pivot 12. The lever 9 engages a vertical arm of a bell-crank lever 14 and causes its horizontal arm to move downwards to engage the upper end of a spindle 16, continuously driven by the gramophone motor, which spindle is thus moved axially downwards against a spring, an arm on the lower end of the spindle engaging a projection on the dial of the impulse transmitter to effect dialing. At the end of the dialing operation, a pin on the drum 8 causes the bell-crank to be moved out of engagement with the spindle 16 to prevent subsequent repetition of dialing. Further progress of the cam causes operation of the lever 10, which through a leakage 33, 34, 35, releases a catch 30 so that during a gradual return of the lever 10 due to the shape of the cam, the lever 35 moves to the right away from the tone-arm support 36, to lower the tone arm on to the record. After lowering the sound box, a pin (not shown) on the drum 8 causes rotation of a star-wheel 27 and operation of the pawl 43, to disengage levers 33, 35, and prevent premature lifting of the sound box when the cam again engages the lever 10. Further operation of the star-wheel upon the second rotation of the drum, re-engages levers 33, 35 so that the tone arm may be lifted, the subsequent engagement between the cam 7 and the lever 11 causing rotation of a rod 40 which forces a spring (not shown) against an extension of the tone arm support, by which means the sound box is returned to the start of the record. The apparatus is disconnected from the telephone line when the gramophone motor slows down, the release mechanism being operated by the governor. Specifications 442,565 and 492,161 are referred to.
Patent GB-1439180-A (GB)
Title: Method and apparatus for casting annular workpieces of  high dimensional accuracy
IPC: B22D18/04
Filed: 1973-06-04
Abstract: 1439180 Casting processes I SCHUBERT A SCHUBERT F SCHUBERT [trading as E HEINE NACHF and INH ALFRED SCHUBERT KG] 4 June 1973 [7 June 1972] 26607/73 Heading B3F A method of casting an annular article, e.g. a profile ring for tyre manufacture, comprises applying a radial pressure to the solidifying article while supplying heat to the metal by means of heating compounds provided in the wall of the mould, the said heating compounds being inflamed because of the temperature of the melt. The metal may be introduced into the mould through a pipe 64 by gas pressure acting on the surface of metal contained within a crucible 64. The mould comprises upper and lower sections 1 and 2 and a core 4, the parts being clamped together by bolts 3. Uniformly disposed along the periphery of the mould are. press rams 14 movable radially inward to apply pressure to the metal in the mould, the forward movement of each ram being limited by a pin 44. The end of each ram is covered with resin bonded sand 24 in which is embedded a heating compound 25. Further heating compounds 31 are embedded in a ring 28 of sand defining a part of the mould cavity 10. Cast iron cooling blocks 46 are also embedded in the ring 28. The core 4 is provided with a duct 54 through which the metal flows into the mould cavity 10 and a vent 55. A gate disc 50 is located in an aperture 8 in the lower mould section 2 and is held against the core 4 by screws 57<SP>1</SP>. The socket 51 of the gate disc 50 is brought into contact with the upper end of the tube 65 by means of centring screws 47 and wedges 61. The upper mould section 1 may be provided with an inspection aperture 9 and the lower section 2 with inspection apertures 45. After the east article (82) has been removed from the mould, stepped rings (83) and (84) Fig. 8 (not shown), are inserted into its central aperture to prevent distortion of the article during cooling, and the article cooled slowly in an annealing furnace.
Patent GB-442457-A (GB)
Title: Improvements in means for scouring or cleaning the bottom of swimming ponds, tanks and the like
IPC: E04H4/16
Filed: 1934-09-17
Abstract: 442,457. Cleaning swimming ponds &c. DAVIDSON, A., 59, Ashley Drive, Edinburgh. Sept. 17, 1934, No. 26615. [Class 138 (i)] A machine for cleaning swimming ponds, tanks, &c., comprises a rotary drum A pro. vided with squeegee blades N and located within a casing D which is supported with a slight clearance at the sides from the floor of the swimming pond. The drum is carried by arms E, F which are pivoted on spindles carrying wheels I, J, and is driven through gearing by the wheel J as the machine moves along the floor. The drum spindle extends through arcuate slots in the casing and is held in position by wing nuts O. The top of the casing is provided with connections W to a pump by means of which sediment may be removed. Rubber-covered rollers Q, R fitted inside the casing in slotted bearings act as a trap for sediment. The machine is drawn across the bottom of the pond by means of ropes fastened to eyes U on the top of the casing.
Patent GB-936172-A (GB)
Title: Improvements in or relating to nickel plating
IPC: C25D15/02
Filed: 1961-07-21
Abstract: 936,172. Nickel plating baths. UDYLITE RESEARCH CORPORATION. July 21, 1961 [July 26, 1960 (3)], No. 26619/61. Class 41. A lustrous coating of nickel is formed on a metal surface using an acid electro-plating bath containing a nickel salt, a brightening agent, and a suspension of a finely powdered insoluble inorganic compound, the grain size of which is less than 5 Á, and preferably 0.02 to 0.5 Á, e.g. oxides, phosphates, oxalates, silicates or fluorides of alkaline earth metals, aluminium, iron, zirconium, cerium, nickel and chromium; silica, carbides of silicon, boron, and titanium; zinc or cadmium sulphide; and iron silicide. The suspension is maintained by mechanical or air agitation, or by ultra-sonic vibration, and by adding dispersing agents. In examples, a nickel plating bath containing nickel sulphate, chloride, sulphanate, or fluoborate, is agitated while adding 10 g. to 500 g. per litre of mica, kaolin, talc, finely powdered glass; barium or strontium sulphate, carbonate, or oxalate; zirconium aluminium or titanium oxide, all of 0.03 to 0.3 Á particle size. The brightening agents added may be aryl sulphonamides, or sulphonic acids, N-allyl quinaldinium bromide, coumarin, butyne diol and other compounds. Plating temperatures of 60 to 82 C. are applied at pH 2.8 to 5.2. After coating, the surface which may be Fe, Al, Mg, Cu, Zn or brass, is freed from loosely adherent particles by treating with HCl or by applying a flash coating of zinc. Final plates of Cr, Sn, Ag, Rh, Cu, Au or Sn-Ni alloy can be given or a coating of clear lacquer. Specifications 743,726 and 836,802 are also referred to.
Patent GB-969034-A (GB)
Title: Apparatus for the remote indication of d.c. voltages and currents
IPC: G01R19/18
Filed: 1961-07-24
Abstract: 969,034. Measuring voltage. LONDON TRANSPORT BOARD, and R. C. DRAIN. July 11, 1962 [July 24, 1961], No. 26758/61. Heading G1U. Telemetering. Apparatus for transmitting D.C. voltages comprises a transistor chopper VT 1  VT 2  to convert the D. C. into A. C., a transformer T 2  serving both to isolate the D. C. and to step up the A. C. signal to a full wave rectifier D 1  D 2 ...... D 6 , the D. C. output from the rectifier being then transmitted by a telephone cable 12 to a meter M. Bias voltages of mains frequency and the correct phase are injected into the transformed A. C. before rectification in order to overcome the minimum forward voltage of the diode rectifier D 1 ..... D 6 . The bias voltages are made larger than necessary and meter 23 adjusted to zero when there is no D. C. input so that there will be a below zero reading on the meter when the transmitter fails or is switched off.
Patent GB-1049595-A (GB)
Title: Improvements in or relating to frequency metering circuits
Inventor: APPLEBY WILLIAM GEORGE CHRISTO
IPC: G01R23/00
Filed: 1964-06-29
Abstract: 1,049,595. Analogue-to-digital converters. GENERAL ELECTRIC CO. Ltd., and W. G. C. APPLEBY. June 17, 1965 [June 29, 1964], No. 26783/64. Heading G4H. The frequency of a signal whose frequency is to be determined is multiplied and the resulting signal gated for predetermined periods less than one second, the number of cycles in each period being determined, e.g. by a counter with visual read-out. The gate is opened by frequencydivided clock pulses, and the counter output may be compared with a required value for the frequency to control the frequency.
Patent GB-1503065-A (GB)
Title: Optically coupled isolators
Inventor: FOWLER WILLIAM R
IPC: H04B10/00
Filed: 1976-06-28
Abstract: 1503065 Optical isolator NATIONAL SEMICONDUCTOR CORP 28 June 1976 [30 June 1975] 26808/76 Heading G1A In an optical isolator, comprising a light emitting diode 24 and a light-sensitive diode 26, the effects of stray capacitance between the diodes 24 and 26 is mitigated by subtracting the output of a "blind" light-sensitive diode 32 from the output of the light-sensitive diode 26. The further light-sensitive diode 32 which is shielded from light, is positioned so as to be subjected to substantially the same amount of stray capacitance as the diode 26. The subtraction is effected by a differential amplifier 33. Thus the differential amplifier's output signal is substantially free from the effect of stray capacitance. The further light-sensitive diode may be shielded from light by covering it with an opaque material such as black epoxy resin. In a modification Fig. 4 (not shown), the common mode rejection of the isolator may be enhanced by using diodes whose anodes are grounded.
Patent GB-778282-A (GB)
Title: A hydro-pneumatic shock-absorber, particularly for motor cars
IPC: F16F9/06
Filed: 1953-01-14
Abstract: 778,282. Hydraulic shock absorbers. STURARI, C. Jan. 14, 1953 [Jan. 15, 1952 ; April 3, 1952], No. 26839/55. Divided out of 778,281. Drawings to Specification. Class 108(3). The description is identical with that of Specification 778,281, but the claims differ.
Patent GB-640949-A (GB)
Title: Improved process for the refining of paraffin waxes
IPC: C10G73/36
Filed: 1947-10-06
Abstract: Paraffin waxes such as slack waxes or crude scale waxes which have been acid treated are refined by distilling them in the presence of a hydroxide or carbonate of an alkali metal in an excess of that required to neutralize any acidity in the slack wax (e.g. 0.25 per cent excess sodium hydroxide) or in excess of that required to neutralize the acidity of the treated scale wax (e.g. 0.1 per cent excess sodium hydroxide).  The sodium hydroxide may be in an aqueous solution of for example 34-38 DEG  Baume gravity and the acid used for treating the scale wax may be sulphuric acid of 80-104 per cent concentration.  When acid-treated crude scale wax is used as the starting material, the overhead from the distillation of this wax in the presence of the alkali may be recovered and the waxy constituents thereof sweated to produce a refined wax.  When slack wax is used as the starting material the distillation over an excess of the alkali may be continuous, a side stream may be segregated, the side stream sweated to produce crude scale wax, the latter acid treated and neutralized, and the neutralized product sweated to produce a refined wax.  The refined wax may be further treated with an adsorptive decolorizing agent such as bauxite.  The distillation over the alkali may be carried out either at atmospheric or reduced pressure. Examples are given in which acid treated crude scale and slack wax respectively are distilled with an excess of caustic soda.
Patent GB-519116-A (GB)
Title: Improvements in or relating to the cylinder bores or associated parts of internal combustion engines, especially sleeve valve engines
IPC: F01L5/10
Filed: 1938-09-15
Abstract: 519,116. Lubricating engine cylinders. NAPIER & SON, Ltd., D., and TRYON, H. C. Sept. 15, 1938, No. 26915. [Class 122 (i)] [Also in Group XXVII] Inclined or helical grooves C<1> are provided in the lower end of the cylinder or sleeve valve so as to be overrun by the scraper rings D<2> of the piston, holes C<2> leading the oil from these grooves through the cylinder or sleeve-valve walls into the crank case. The scraper ring may be formed at one edge with recesses which come into communication with the grooves C<1>; or there may be an annular recess in the piston below the scraper ring.
Patent GB-321505-A (GB)
Title: Method of, and apparatus for, erecting staging, platforms and the like
IPC: E04G1/34
Filed: 1928-09-19
Abstract: 321,505. Fortune, J. M. Sept. 19, 1928. Trestles.-A trestle shoe consists of two parts a hinged together at c, each part a being formed from bent sheet metal to comprise a socket m for the top of a leg timber. Plates f are secured to the sheet-metal bracket and these are toothed internally so that they can grip into a horizontal timber member forming the top bar of the trestle. A coiled spring r is disposed around the hinge pin b and forces the jaws together. An adjustable brace may be used to fit about the legs to hold them in adjusted position.
Patent GB-970348-A (GB)
Title: Tierable and end-nestable receptacles
IPC: B65D21/04
Filed: 1961-07-26
Abstract: 970,348. Stackable receptacles. W. H. LOCKWOOD. July 26, 1961 [Aug. 3, 1960], No. 27044/61. Addition to 900,409. Heading B8P. A tray adapted for stacking and nesting as in the parent Specification differs from the embodiments described therein in having additional locking elements. Bottom longitudinal members 558 have downwardly opening notches 558d at their forward ends and parallel members 554 have downwardly opening notches 554d towards the rear of the tray. Transverse members 553 terminate at each side of the tray in S-shaped portions 553c which connect the longitudinal members 558 and 554. Members 556 which form the tops of the side portions have bent portions 556c at their forward ends and upwardly sloping portions 556f and upwardly opening notches 556g at their rear ends. Fig. 4 shows stacking of the trays, where at the rear, portions 553c of the rearmost member 553 of the upper tray engages notches 556g of the lower tray and at the front, notches 558d of the upper tray engage bent portions 556c of the lower tray. Fig. 7 shows nesting of the trays wherein portions 553c of the upper tray run on members 554 of the lower tray until the rearmost portions 553c ride over notches 554d and are retained therebehind. Tilting of a stack of trays for display purposes (Fig. 6, not shown) is described wherein a pair of portions 553c of an upper tray is engaged by notches 556g in the lower. Article-retaining members 561, Fig. 1, are provided at each open end of the tray.
Patent GB-884902-A (GB)
Title: System for washing butyl rubber reactors
IPC: C08F10/00
Filed: 1960-08-05
Abstract: In a process for preparing a polymer, in which an isoolefin, a Friedel-Crafts catalyst and a haloalkane diluent having 1 to 2 carbon atoms are continuously introduced into a polymerization zone at a temperature of 0 to - 250 DEG  F. to form a slurry of solid polymer particles in cold reaction liquid, which is continuously discharged into a flash zone containing an aliphatic saturated hydrocarbon having 4 to 8 carbon atoms at a temperature of 100 to 150 DEG  F. to flash off the volatile reaction liquid and form a solution of polymer in hydrocarbon, and in which a film of polymer builds up on the surfaces of the polymerization zone, the said polymer films are removed by a method which comprises stopping the introduction of isoolefin, catalyst and diluent to the polymerization zone, deactivating the catalyst already present in the polymerization zone, and then continuously introducing the C4-8 aliphatic saturated hydrocarbon at 100 to 150 DEG  F. to the polymerization zone to dissolve the polymer film, while continuing to discharge the polymerization zone contents into the flash zone, discontinuing the introduction of said aliphatic hydrocarbon after all said polymer film has been dissolved and recommencing the flow of isoolefin, catalyst and diluent to the polymerization zone.  The isoolefin may be isobutylene, and it may be copolymerized with a minor amount of a multiolefin, e.g. isoprene.  The haloalkane diluent may be methyl or ethyl chloride. The catalyst may be aluminium chloride and may be deactivated by adding alcohol.  The aliphatic hydrocarbon may be hexane. Apparatus suitable for carrying out the process of the invention is described and illustrated.
Patent GB-340224-A (GB)
Title: Improvements in or relating to electric upsetting apparatus
IPC: B21J9/08
Filed: 1929-09-20
Abstract: 340,224. Forging-machines. BENEDETTO, G., 45, Dante Alighieri, Novara, Italy. Sept. 20, 1929, No. 27200/30. Divided on 340,215. [Class 83 (iv).] Dies.-The body of the anvil electrode of electric upsetting apparatus is mounted for angular movement about an axis transverse to the machine axis for the purpose of producing inclined blanks as shown at f, Fig. 4, and may also be rotatable allowing twisted forms to be produced. The anvil face 26, Fig. 2, is renewable and clamped to the body 16 by a screw ring 27, a soft metal packing ring being interposed at 25 for good electrical contact. The body 16 is hollow and fitted with pipes 29, 30 for circulating cooling fluid behind the face 26. The hemispherical end of the body is seated in a recess in the anvil 14 and is adjustable angularly about a transverse axis by hooked bolts 23 engaging a flange 17 on the body. A worm 28 engaging a worm wheel 22 on the body enables the latter to be rotated. During the upsetting operation the work may be pressed laterally by plungers 37 in pressure fluid cylinders 36 supplied by pipes jointed at 39 and movable along the bed 13 by screws 20 and hand wheels 42. By suitable relative movement of the anvil 14 and clamping electrode 11 work pieces of the shape shown at a .. f, Fig. 4, may be produced. Specification 340,215 is referred to.