baber/WOPTO huggingface dataset:
Patent GB-1281127-A (GB)
Title: Improvements relating to contacts for semiconductor devices
Inventor: MAGEE VINCENT
IPC: H01L23/485
Filed: 1970-02-21
Abstract: 1281127 Semi-conductor devices FERRANTI Ltd 19 April 1971 [21 Feb 1970] 8433/70 Heading H1K A semi-conductor device, e.g. a diode is conventionally formed by diffusion in a silicon wafer 11 and an aluminium contact 15 to region 12 extends through aperture 13 of passivating silicon oxide layer 14, and over the layer to ohmically contact the wafer after sintering. Initially a temporary zinc layer is deposited on the aluminium from watery solution of ZnO and NaOH and removed by etching with dilute HNO 3  after which a permanent zinc layer 16 is similarly applied to adhere to the Al. A layer of nickel 17 is immediately deposited to overlay the zinc by reduction of acid nickel chloride with sodium hypophosphite or borohydride without attacking oxide layer 14, and the nickel is coated with conventional tin based solder 18 for attachment of connections. In a modification the aluminium is etched over photoresist to form a contact extending over the passivating layer into a bonding pad. A layer of a silicon oxide is evaporated on the contact and an aperture is etched to expose the bonding pad. This is selectively treated as above and the masking layer is removed before or after soldering connections to the deposit. Aluminium conductors may be similarly treated before attachment using photoresist masking.
Patent GB-367212-A (GB)
Title: Improvements in or relating to radio apparatus employing neutralised valve stages
IPC: H03F1/16
Filed: 1931-03-19
Abstract: 367,212. Valve generating circuits. LORENZ AKT.-GES., C., 1, Lorenzweg, Tempelhof, Berlin. March 19, 1931, No. 8483. Convention date, April 28, 1930. [Class 40 (v).] In wireless apparatus employing neutralized valves the neutralizing is effected by two condensers in series of which one is variable and is bridged over for direct current voltage. The Figure shows a push-pull oscillator for short waves in which the neutralizing condensers N1, N2 are bridged by resistances W1, W2 and arranged in series with fixed condensers F1, F2. The neutralizing condensers can thus be of small dimensions, even though high voltages are used, and have a low capacity to earth.
Patent GB-581278-A (GB)
Title: Production of haloacetyl halides
Filed: 1945-04-06
Abstract: Haloacetylhalides are produced by heating at elevated temperature and pressure an anhydrous mixture of carbon monoxide and a polyhalogenated methane in the presence of a substantially anhydrous Friedel-Crafts type catalyst.  Specified polyhalomethanes are carbon tetrachloride, -bromide or -iodide, chloroform, bromoform, iodoform, fluoroform, methylenechloride, -bromide, -iodide or -fluoride, trichlorofluoromethane and chlorotrifluoromethane.  Catalysts which may be used are aluminium chloride or bromide, ferric chloride, zinc chloride, tin tetrachloride, titanium tetrachloride, zirconium tetrachloride and boron trifluoride, in organic complexes like aluminium chloride/sodium chloride or zinc chloride or copper chloride or organic complexes such as aluminium chloride with benzene or chloroform.  The catalyst may be promoted by an added acid, e.g. hydrochloric acid, and may also be supported for example on carbon, barium sulphate or kieselguhr.  In the examples, (1) carbon tetrachloride is reacted with carbon monoxide in the presence of aluminium chloride or ferric chloride to give trichoracetyl chloride and some phosgene, perchloroethylene and hexachloroethane; (2) chloroform and carbon monoxide are reacted in the presence of aluminium chloride giving dichloroacetyl chloride and some phosgene; (3) methylene chloride and carbon monoxide over aluminium chloride with hydrogen chloride give monochloro-acetyl chloride.
Patent GB-369394-A (GB)
Title: Improvements in or relating to processes for the production of smokeless fuel
IPC: C10B49/00
Filed: 1931-03-20
Abstract: 369,394. Process for making semicoke. POWELL, H. E., 141, Oxford Road, Linthorpe, and DORMAN, LONG, & CO., Ltd., Zetland Road, both in Middlesbrough. March 20, 1931, No. 8655. [Class 55 (i).] In the production of semi-coke in an ordinary coke oven, a bed of hard coke is formed on the floor of the oven before the charge of coal is introduced, so that the semi-coke obtained does not stick to the floor when the oven is discharged. The oven temperature may be maintained at 1000‹ C. or more, in which case the time for carbonization is shortened, or 'a lower temperature of between 1000 and 700‹ C. is used.
Patent GB-1284986-A (GB)
Title: Improvements in or relating to cutting tools
IPC: B23B27/16
Filed: 1970-02-24
Abstract: 1284986 Cutting tools SOC INDUSTRIELLE D'ELECTRO-METALLURGIE 24 Feb 1970 [1 April 1969] 8780/70 Heading B3T In a cutting tool having a support body 1 with a removable cutting insert 10 which is secured to the body by a screw 12 which passes through an aperture 11 in the insert and into a threaded bore in the body, the bore 3 in the body is provided with an internally and externally threaded sleeve 4 into which the screw 12 is engaged, the cutting insert may therefore be released by rotary displacement of the sleeve 4 in the bore 3 by a socket and wrench 14 or by rotation of the screw 12 by a socket wrench 13. The initial release of the insert by the rotation of the sleeve overcomes the problem of the screw head 12 sticking in the tapered aperture 11. A seating plate 6 may be provided for the insert and this is retained in the body 1 by a resilient split ring 8 which is inserted in the top of the bore 3.
Patent GB-935933-A (GB)
Title: Improvements in or relating to crushing apparatus
IPC: B02C13/26
Filed: 1962-03-08
Abstract: 935,933. Crushing apparatus. A. BARICORDI. March 8, 1962 [March 21, 1961], No. 8873/62. Class 59. A crushing apparatus comprises radial arms 4, 5 carried by a shaft 1 which is mounted for rotation within a casing 23, the arms, which form biconvex and biconcave radial chambers 6, 7, each being perforated at 8 on its radial axis and provided with elongated perforations 9 at an angle of 45 degrees to such axis. The arms, as shown in Fig. 2, are spaced around the shaft by rings 3, 13 and provided with outer reinforcements 12 for coaction with a stator 14 which is provided with perforations 16, 18, 18a, 19, 19a disposed in inwardly-facing undulations 15. Elements 21, 21a for producing air vortices are provided and may be arranged as shown in either Fig. 1 or 4, and, according to the arrangement of grooves along the sides of the element, cause the material that is suspended by air to be directed radially on to the stator 14 internally into the chamber or on to the reinforcements 12. Material to be crushed is introduced at C into the chambers where, after it is initially crushed by impact of the arms and edge portions of their perforations, autogenous crushing is effected by the inter-action of the vortices produced by the elements 21, 21a, and further crushing by the impact action of the stator 14 and reinforcements 12. Material which is not crushed by the arms is ejected outwardly against the stator 14 by rotary forces where it is subjected to impact and shearing effects caused by the reinforcements 12 sweeping past the perforated undulations. Ground material passes out through these perforations and is discharged at the bottom of the apparatus.
Patent GB-1449731-A (GB)
Title: Wheelchair
IPC: A61G5/10
Filed: 1974-02-27
Abstract: 1449731 Adjustable armrests U DANZIGER and R DANZIGER 27 Feb 1974 [8 March 1973] 8877/74 Heading A4J [Also in Division B7]  A wheel chair (see Division B7) may be fitted with a removable or a pivotable armrest 30. The armrest comprises a tubular frame 31 carrying a rigid sheet of metal or plastics and pivoted at 36, 37 to tubular members 40, 41 which are vertically adjustable in sleeves 45, 46 on the chair frame. The members 40, 41 may be removed from the sleeves and are provided with detent holes 44 engagable by pins 42, 43 on the sleeves.
Patent GB-581953-A (GB)
Title: Improvements relating to stopping mechanism for yarn and like winding machines
IPC: B65H63/08
Filed: 1944-05-10
Abstract: 581,953. Yarn winding machines AMERICAN VISCOSE CORPORATION. May 10, 1944, No. 8887. Convention date, June 3, 1943. [Class 120 (ii)] A yarn winding machine having a winding spindle, a reciprocating traverse member and means for swinging the spindle and traverse mechanism relatively to each other as the winding proceeds, is furnished with automatic stop means comprising an element constantly driven during the operation of the machine and a stop member movable into engagement with the driven element to initiate the operation of the stop means, the member having an extension positioned in the path of the reciprocating traverse member so that the stop member is moved thereby to initiate the stop means when a package of predetermined size has been wound. During normal operation of the machine, hook 28 on a segment 20, pivoted at 21 to the main frame, engages a hook 27 on an arm which operates a clutch, driving the spindle 3, and also the brake 26. The hook 27 is biassed by a spring 25 so that upon release by the hook 28 the brake 26 will be applied to the spindle and the driving clutch thrown out. The operation of the hook 28 is brought about by the movement of the segment 20, about its pivot 21, which happens when a thread breaks or fails so releasing an arm 33 attached to the segment 20, into the path of a rotating notched wheel 35. Also attached to the segment 20 is an arm 40 carried in a block 41 which also carries an adjustable arm 42 the end 44 of which projects into a position where it may be contacted by a shoulder on the traverse bar which has been moving outwardly from the spindle 3 as the package was growing. When the end 44 is so contacted, the arm 40 is depressed into the wheel 35 which tilts the segment 20 and stops the machine. In a modification, the arm 40 is arranged to co-operate directly with the arm 33 to stop the machine while in a further modification the arm 40 is omitted, the arm 42 being arranged to operate the arm 33 to stop the machine. Specifications 26235/04, [Class 120] and 492,223 are referred to.
Patent GB-1127795-A (GB)
Title: Method and apparatus for regulating the exposure in photo-printing
IPC: G03B27/80
Filed: 1966-03-01
Abstract: 1,127,795. Controlling exposure in photoprinting. AGFA-GEVAERT A. G. March 1, 1966 [March 10, 19651, No. 8925/66. Heading G2A. In a method of regulating exposure in photoprinting, the exposure is terminated in dependence on a summation signal derived from two signals, one being time-dependent and initiated simultaneously with the exposure, and the other dependent on the illumination intensity. As shown, part of the light from source 1 falls on a photo-multiplier 5, the resultant current passing through a logarithmic amplifier 7, and then through a multiplier 8 where it is multiplied by a variable co-efficient y. When exposure is initiated, by closing the coupled switches 2 and 3, the linear timer 11 is started, and transmits a time-dependent signal via the logarithmic amplifier 12 to the multiplier 13, where it is multiplied by a variable co-efficient #. The two signals are passed on to an amplifier 18 where they are added together, and matched against a comparison voltage, which takes into account the film sensitivity, in a comparator 19. When a particular relationship is obtained between the two voltages (e. g. equality), a switch 4 is opened, which terminates the exposure. The exposure as regulated by this arrangement can constitute an overcorrection or undercorrection of that given by the reciprocity law, corresponding to the exponent p in the Schwarzchild equation I.t<SP>p</SP> = const., by suitably adjusting the values of the variable multipliers 8 and 13, and expressing the equation in the form y log I + # log t = const. Details of the various operative amplifiers shown diagrammatically in Fig. 1 are set out in Figs. 3-6 (not shown).
Patent GB-1049133-A (GB)
Title: Improvements relating to circuit operation checking systems
IPC: G06F11/00
Filed: 1965-03-03
Abstract: 1,049,133. Electric selective signalling. INTERNATIONAL BUSINESS MACHINES CORPORATION. March 3, 1965 [March 7, 1964], No. 9008/65. Heading G4H. The operation of a circuit having a plurality of groups of components actuated by successive half-cycles in one direction of an alternating voltage, is checked by a plurality of devices each associated with a corresponding component in each group to indicate, for each group in succession, any errors in the operation of said components. The particular embodiment is a modification of that of Specification 991,073 which is referred to, and differs from it by the addition of errordetecting circuits. Referring to Fig. 1 (not shown), a ten-digit decimal number is set up on a matrix M by pressing keys, each column wire of the matrix being connected to one out of ten row wires depending on the value of the digit to be stored in that column. The row wires are connected via diodes D51-D67 and relay contacts to lines 11, 21, 41, 81 during four successive positive (say) half-cycles of an A.C. source, respectively. A set of four storage relays, e.g. S10, S20, S40, S80, is provided for each column of the matrix to store the binary-coded equivalent of the column's digit as provided by the diodes D51-D67. The lowest order bits of the ten decimal digits are stored in the storage relays when line 11 is connected to the row wires, as above, during a particular positive half-cycle of the source. The next-to-lowestorder bits are stored during the next positive half-cycle when line 21 is connected, and so on. Check relays K0-K9 are provided, one for each decimal digit, each being set during any positive half-cycle in which a ONE bit is stored in one of the associated set of four storage relays. Relay contact trees formed of contacts of the storage relays reset a given check relay during the next (negative) half-cycle of the source if the four-bit number stored in the corresponding storage relays is a legal combination (Figs. 2, 3, not shown). If any of the check relays is not reset, a relay F1 (not shown), set at the beginning of operation, is reset and cannot be set again (Fig. 4, not shown). Setting of storage relays required to be set is thus checked. Concurrently, a check to see if any storage relay not to be set is nevertheless set (e.g. due to a faulty erase operation previously), is performed by causing the set state of a storage relay to reset a relay F2 (not shown) if the corresponding check relay is not set. At the end of the complete decimal-to- BCD conversion, an error signal is given if either of relays Fl and F2 (not shown) is reset to cause machine stop, error indication or repeat of operation.
Patent GB-511303-A (GB)
Title: Improvements in vehicle window regulators
IPC: E05F11/38
Filed: 1938-03-24
Abstract: 511,303. Window regulators. DETROIT HARVESTER CO. March 24, 1938, No. 9033. Convention date, June 29, 1937. [A Specification was laid open to inspection under Sect. 91 of the Acts, Sept. 26, 1938.] [Class 20 (iii)] A vehicle window regulator of the kind having a window lifting crank or lever such as that disclosed in Specification 505,707 is provided with remote control for the crank consisting of hand-actuated gear and links 35, 36 connecting the pinion 34 to the pivoted crank 14. The links are parallel and connected to the pivoted members 34, 14 at opposite sides and at equal distances from the axes 32, 13.
Patent GB-116292-A (GB)
Title: Improvements in Metal-sheet Coating Apparatus for use in Plant for Planting such Sheets.
IPC: B21D11/20
Filed: 1917-06-11
Abstract: 116,292. Thermic Plating Process Co., (Assignees of Watkins, W. E.). June 10, 1916, [Convention date]. Coating-machines - Relates to machine for coating sheets of metal on one or both sides with plating-composition and suitable for use in plating.. plant as described in Specification 107,201. The composition is fed from a tank 153, Fig. 4, provided with a stirrer, by a pump 165 to slotted pipes 133, 152 by which, it is delivered to rolls 134, 147 and thence to the coating-rolls 113, 114. Distributing-rolls 135, 148 are provided to equalize the coating over the rolls 134, 147. The shafts 116, 117 of the coating-rolls 113, 114 are provided with bearing-blocks guided in slots in the machine frame 100 and separated by springs, the upper roll being adjustable independently at each end or simultaneously at both ends by mechanism of the following character. Above each of the bearing-blocks of the upper roll is provided a stopbar 121, Figs. 4 and 7, which passes freely through a worm-gear 125 and engages a nut 126 adjustably connected to the worm-gear by a set-screw 127 and a slot. Both ends of the upper roll may therefore be adjusted simultaneously by rotating the worm-gears 125 by a shaft 131 provided with a hand-wheel 132, or the ends may be adjusted independently by adjusting the nuts 126 with respect to the worm-gears 125. Similar adjusting- mechanism is provided for the rolls 134, 135, 147, and 148. Unused composition is returned by troughs 173, 175 to the tank 153. A valved bypass 171 is provided through which composition may be circulated without passing to the rolls, and the pump may be disconnected and operated by hand for priming and to mix the composition. Scrapers 144, 151 are provided to remove incrustations from the ends of the rolls 134, 135, 114, 147. The sheets A to be coated are automatically fed along a table 101, Figs. 3 and 10, between stops 102, 103 by a finger 198 working in a slot in the table and pass to the coating-rolls 113, 114. The stop 103 is pulled inwards to position the sheet against the stops 102 by a spring 112, and is retracted by a cam 110 mounted on a sliding block 199, Fig. 10, which carries also the reciprocating finger 198. The block 199 is retracted by a cam 207 mounted on the driving- shaft 180, and is urged forward, to feed the sheet, by a spring acting on a crank 211 on the shaft 203. The various rolls, pump, stirrer, &c. are driven by gearing &c. from the shaft 180.
Patent GB-309719-A (GB)
Title: Improvements in core knockout device for moulds for casting metals
IPC: B22D15/02
Filed: 1928-03-26
Abstract: 309,719. Marks, E. C. R., (Bohn Aluminum & Brass Corporation). March 26, 1928. Moulds ; cores.-A core is loosened, after casting, by a device which can move relatively to the core and mould and which slides freely in the latter. The permanent mould 1, 2 has a permanent core comprising side sections 4, 5 and central section 6, preferably tapered, and loose pins 8 arranged opposite the centres of percussion of the sections 4, 5. After casting, the section 6 is removed and the pins 8 are subjected to light blows to loosen the sections 4, 5 so that they can be removed one at a time.
Patent GB-474139-A (GB)
Title: Process and apparatus for the thermal conditioning of devices such as rollers serving for the manufacture or the treatment of glass articles
IPC: C03B13/16
Filed: 1937-03-31
Abstract: 474,139. Glass manufacture. SOC. ANON. DES MANUFACTURES DES GLACES ET PRODUITS CHIMIQUES DE ST.- GOBAIN, CHAUNY, ET CIREY. March 31, 1937, No. 9154. Convention date, March 31, 1936. [Class 56] A method of regulating the temperature of devices used in manufacturing glass articles, particularly rollers used for making or transporting glass sheets, consists in bringing into contact with the rollers brushes having metal bristles. Fig. 1 shows a rolling apparatus in which glass 1 flowing from a furnace 2 is formed into a sheet 5 by means of parallel rollers 3, 4. The rollers are cooled by means of metal brushes 6, 7 having hollow frames through which water is circulated. The cooling effect of the brushes can be regulated by varying the temperature of the fluid flowing through the frames, or by varying the diameter, length, material, and the density of distribution of the bristles. Several brushes may be used along the length of a roller in order that intensity of the cooling may differ at different points. Instead of being stationary, the brushes may be rotated, as shown in Fig. 5. The brushes may also be cooled by causing the bristles to make contact with a watercooled casing 30. The cooling action of the brushes may be combined also with the cooling action of a fluid projected onto the surface of the roller. For example, air may be blown from a tube 40, Fig. 7, on to the roller and allowed to escape either through an aperture 42 or through the bristles. The brushes may be used to heat the rollers by passing hot fluid such as steam through the frames or by heating the frames or mountings directly. The wires forming the bristles may be replaced by thin blades. A hollow roller may be cooled by brushes arranged in its interior.
Patent GB-551552-A (GB)
Title: Improvement in sound recording and reproducing device
IPC: G11B25/02
Filed: 1941-07-21
Abstract: 551,552. Phonographs. DICTAPHONE CORPORATION. July 21, 1941, No. 9190. Convention date, Aug. 3, 1940. [Class 40 (ii)] In a phonograph having a transducing device (sound-box or electric) adapted to be moved to recording or reproducing position, a weighted lever is arranged to counterbalance the transducing device when this is in the recording position, and may also have the opposite effect of pressing the transducing device down when this is in the reproducing position. The arrangement shown in Fig. 1 comprises the usual combined recording and reproducing sound-box 24 at the inner end of a tone-tube 26 mounted at its other end with universal joints in a tubular casing 28 by means of intermediate sleeves 30, 48, the sleeve 30 being connected by a link 34 to a lever 32 by which the sound-box can be moved from the inward recording position of Fig. 1, to an outward reproducing position, and a cam 78 being provided on the tone-tube 26 to co-operate with a ledge 80 to lift the sound-box in its intermediate positions. According to the invention, a U-shaped lever 82 weighted at 100 is pivoted at 84 on the tubular casing 28. and has extensions 104, which may have resilient pads, co-operating with pins 102 on the tonetube 26. In the recording position, Fig. 1, the pin 102 lies over the extensions 104 and the weight 100 is lifted from the sound-box and by its leverage action on the pin 102 partly balances the weight of the sound-box, thus reducing the pressure on the recording stylus. When the sound-box is shifted outwards to the reproducing position the pin 102 moves away from the extensions 104 and the weight 100 bears on the sound-box and increases the pressure on the reproducing stylus. The Specification as open to inspection under Sect. 91 describes also a different arrangement of weighted levers. In that arrangement, as shown in Fig. 5 (Cancelled) in the reproducing position, a weighted lever 222 is pivoted on the - inner sleeve of the universal mounting of the tone-tube 26 and presses on the sound box in the reproducing position, and when the soundbox is moved inward to the recording position, the tone-tube is lifted by the cam 78 riding over the ledge 80 and the end 224 of the weighted lever is brought over a step 226 on the carriage 10, so that the weighted lever remains lifted from the sound-box. In addition, a streamlined weighted lever 204 is pivoted at 206 inside the tone-tube and a bent extension 208 of this lever bears against a pad on the inside surface of the tone-tube, thereby partly counterbalancing the weight of the sound box in all positions. This subject-matter does not appear in the Specification as accepted.