baber/WOPTO huggingface dataset:
Patent GB-416572-A (GB)
Title: Improvements in the puriflcation of copper
IPC: C22B15/00
Filed: 1933-02-08
Abstract: Copper containing bismuth as an impurity is treated for the removal of the bismuth by adding to the molten copper an alkali metal, or a hydroxide, oxide, or carbonate of an alkali metal, or any mixture of these reagents, in the presence of air, oxygen, or an oxidizing agent, and removing any compounds formed, for example by skimming. The treatment is carried out on a furnace hearth or in a crucible or other container made of or lined wholly or in part with a refractory material such as magnesite which is inert to or only slightly acted upon by strongly alkaline slags or fluxes.  The reagent may be added to the surface of the molten copper or may be passed through the molten metal, or the molten copper may be passed in a stream or spray through the molten reagent.  Air may be blown through the molten copper or an oxidizing agent such as cuprous oxide may be added and sodium hydroxide, oxide, or carbonate may then be added, after preheating, and stirred into the metal.  The oxidation and treatment with the alkali metal reagent may be repeated one or more times.  If metallic sodium is used this may be introduced as vapour by bubbling nitrogen or other inert gas through molten sodium in a vaporizer, the nozzle of which is placed well below p  the surface of the molten copper.  More oxidizing agent is used when employing an alkali metal than when employing an alkali metal oxide, hydroxide, or carbonate. The copper is finally treated for the reduction of the excess oxygen prior to casting. Specifications 2060/87, 4251/93, 17941/96, [all in Class 82], and 4692/12, [Class 82 (i)], are referred to.  Reference has been directed by Comptroller to Specification 17941/96.
Patent GB-1177300-A (GB)
Title: Pulse Sequence Generator
Inventor: SENIZERGUES ANDRE
IPC: H03K3/78
Filed: 1968-01-25
Abstract: 1,177,300. Pseudo random number generators. INTERNATIONAL BUSINESS MACHINES CORP. 25 Jan., 1968 [25 Jan., 1967], No. 3911/68. Heading G4D. A quasi-random sequence of binary pulses, for use in a ciphered data transmission system, comprises a feed-back shift register generator, the output of which is occasionally inhibited by a selector unit. The selector unit may comprise a circuit responsive to particular, and if required varying, sequences of bits at the register output, or may comprise a feed-back shift register. In Fig. 5b, f.b. register R generates a quasirandom sequence of bits under control of shift pulses from OR gate 49. Shift register 31 passes the bits to gate 38. If the bit sequence 10 appears in register 31 units 32, 33, 37 inhibit gate 38. They also trigger a circuit comprising gate 39 and counter 40 so that three shift pulses at four times the frequency of the shift pulses normally fed to registers R and 31 via divider 47 are applied to the registers. Gate 38 is enabled by the pulses from divider 47. Consequently the sequence 10 and the next bit are not passed on by gate 38, the gate giving an unbroken bit stream. The sequences to which units 32, 33 respond may be changed after each response, and the number of high speed shift pulses may also be varied. In a second embodiment, Fig. 6a (not shown), two f.b. registers (P, G) are fed in parallel with shift pulses, their outputs being combined in an output AND gate (50). Whenever an O-bit appears at the output of one of the registers (P) both registers are fed with an extra shift pulse. In a third embodiment, Fig. 7a, the outputs of f.b. registers G0, G1 are alternatively gated to the output OR gate 56 under the control of f.b. register P. Thus, when P outputs a 1, register G1 is shifted and feeds a pulse to gate 56; when P outputs a 0 register G0 is shifted and feeds gate 56. In a further embodiment, Fig. 8a (not shown), four f.b. registers (R1-R4) are fed in parallel with shift pulses. One pair of registers (R1, R2) feeds a first AND gate (60) which feeds an output OR gate (62), and the other pair (R3, R4) feeds a second and gate (61) connected to the OR gate.
Patent GB-900849-A (GB)
Title: Torque limiting devices
Inventor: WATTS HAROLD FRANK BUCKLE
IPC: F16D43/202
Filed: 1958-02-06
Abstract: 900,849. Overload release clutches. NAPIER & SON Ltd., D. May 5, 1959 [Feb. 6, 1958], No. 3972/58. Class 80 (2). An overload release clutch, especially for a turbine transmission, comprises rotary members 11, 12 with tapered helical teeth 15, 16 subjected to the axial thrust of a series of Belle. ville spring washers 20, the internal spaces between which are occupied by pressure liquid supplied through radial passages 24, 25. Under normal conditions the washers 20 maintain the teeth 15, 16 in engagement, at the same time permitting limited relative movement at the tooth flanks for shock absorption, but if overloading occurs the tips 19 of the teeth, which are backed off at an angle of about 5 degrees, engage and a latch device 26 becomes effective to maintain the clutch elements disengaged until reset manually. In a modification. Fig. 7 (not shown), latching is effected by centrifugal pins, subjected also to fluid pressure, the pins operating to hold the clutch teeth entirely separated to prevent chattering. Specifications 704,862, 824,975, 875,223 and 900,848 are referred to.
Patent GB-1020225-A (GB)
Title: Improvements in and relating to fasteners
Inventor: SECKERSON CLIFFORD ALEXANDER
IPC: E05B3/06
Filed: 1963-01-31
Abstract: 1,020,225. Clips; securing door handle shafts to doors. F. T. PRODUCTS Ltd. Jan. 16, 1964 [Jan. 31, 1963], No. 4090/63. Headings E2A and E2B. [Also in Divisions A4 and F2] A resilient fastener 10, Figs. 1 and 2, has a substantially flat body 11, an aperture 14 in the body for reception of a shaft, a pair of lugs 12, 13 bent upwardly from the body, disposed on opposite sides of the aperture and each of which is formed with an inwardly directed projection 17, 18 for engagement against the shaft, and with an outwardly directed projection 15, 16 which is spaced from the body, two pairs of spaced resilient tongues 19, 20 and 21, 22 sheared from the body and between each pair of which a pin is engaged in use and an upstanding flange on the body. In the embodiment shown the fastener which has two upstanding flanges 23, 24 is used to attach a door handle shaft 25 rotatably within an aperture in a door panel 27, Fig. 7. In use a bearing 28, Fig. 5, with two projecting pins is first secured to the fastener by engaging the pins, one of which is shown at 31, between each pair of resilient tongues 19, 20 and 21, 22 on the fastener and providing a washer 29 therebetween. The lugs 12, 13 are are then pushed into the aperture in the door panel so that the projections 15, 16 snap-engage behind the edges of the aperture, the fastener being prevented from rotating in the aperture, which is hexagonal, by the shallow V-shape of the flanges 23, 24. A shaft 25, Fig. 7, is pushed through the bearing 28 until the projections 17, 18 engage in a groove 33 therein so that the shaft is then rotatably mounted in the aperture In a second embodiment the shaft 25 has axial flats as far as the groove 33 so that the projections 17, 18 ride along the flats into the groove 33 to facilitate assembly and disassembly. Rotation of the shaft causes the projections to be retained in the groove and, when a latch mechanism is applied to the shaft, stops in the mechanism prevent the projections from being re-aligned with the axial flats. In other embodiments, Figs. 11 and 12 (not shown), the projections 15, 16 are lugs and bent portions, respectively. It is also stated that the flanges 23, 24 may be straight to engage in a rectangular aperture in a door panel.
Patent GB-906698-A (GB)
Title: Process for the polymerisation of ethylene and catalysts therefor
IPC: C08F10/00
Filed: 1959-02-06
Abstract: A catalyst for polymerizing ethylene comprises TiCl4 (1) and the product obtained by preheating in the presence of an inert organic solvent and preferably in presence of ethylene, AlCl3 (2) with an alkali metal hydride (3), e.g. LiH.  The molecular ratio (3): (2) is below 3:1 and that of (2):(1) is 20-250:1.  The invention comprises also polyethylene, mean MW between 400,000 and 800,000, Vicat softening point between 135 DEG  and 145 DEG  C., Brinell hardness between 0,22 and 0,26 and tensile strength between 280 and 300 kg./cm.2.  French Specification 1,137,459 is referred to.
Patent GB-1524933-A (GB)
Title: Slide chenging mechanism for projectors
IPC: G03B23/04
Filed: 1977-02-02
Abstract: 1524933 Slide projectors PENTACON DRESDEN KAMERA-UND KINOWERKE VEB 2 Feb 1977 [4 Feb 1976] 04263/77 Heading G2J In a slide-changing mechanism for a projector, the slide changer 13, 14 and the magazine are both driven by a single motor through a gear train, and one gear-wheel 6 serves to drive a slotted disc 7 for magazine transport and a toothed gear 9 for moving the slide changer.
Patent GB-1155225-A (GB)
Title: Motor-Driven Fan Unit for Internal Combustion Engines.
IPC: F01P7/08
Filed: 1968-01-26
Abstract: 1,155,225. Centrifugal friction clutches. LANCIA & C. FABBRICA AUTOMOBILI TORINO S.p.A. 26 Jan., 1968 [28 Jan., 1967], No. 4266/68. Heading F2C. [Also in Division F1] In a motor-driven fan unit for a liquid-cooled I.C. engine 13, comprising an axial-flow fan 2 driven directly by an electric motor 9, a centrifugal clutch connects the fan to the engine when the speed of the electric motor exceeds a predetermined value. At engine speeds above a given value, e.g. 2200 r.p.m., the voltage supply to the electric motor is increased to increase the speed of the electric motor and thereby cause a pair of clutch elements 16, 16<SP>1</SP> to move radially outwards against the action of an annular tension spring 20 to engage friction linings 17, 17<SP>1</SP> with an engine-driven pulley wheel 22. The elements 16, 16<SP>1</SP> are connected to the fan for rotation therewith by a pair of pins 15, 15<SP>1</SP> fixed to a fan hub plate 4 and received by recesses 18, 18<SP>1</SP> in the elements 16, 16<SP>1</SP>.
Patent GB-803755-A (GB)
Title: Improvements in or relating to hydraulic couplings for power transmission mechanisms giving automatically variable speed ratios
IPC: F16H61/62
Filed: 1955-02-14
Abstract: 803,755. Variable-speed gearing. USHER, G. W. May 14, 1956 [Feb. 14, 1955], No. 4273/55. Class 80 (2). In a combined arrangement of an hydraulic torque converter with an epicyclic gear, one vaned hydraulic member 1 is connected to a driving shaft 7 and to a toothed annulus 6, a second vaned member 2 is connected to the planet carrier 19 free on the output shaft 8 and the third vaned member 3 and the sun gear 4 are fixed to the output shaft 8. At idling speeds the output shaft 8 is stationary and the planet carrier 19 and member 2 rotate idly. As the speed of the driving shaft 7 is increased the output shaft 8 is driven forwardly at a speed depending on the resistance torque. When applied to an automobile the driven shaft 8 may be connected to a forward, neutral and reverse gear-box.
Patent GB-685272-A (GB)
Title: Improvements in or relating to electronic control circuits
IPC: H05B7/02
Filed: 1951-02-22
Abstract: 685,272. Control systems for resistance welders. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. Feb. 22, 1951 [April 7, 1950], No. 4298/51. Class 38 (iv) The operating solenoid 93 of a fluid valve controlling the movable electrode 7 of a resistance welder is energized from an A.C. supply 15 over a thyratron tube 26 when a switch 87 is operated to connect together the control electrode 47 and cathode 45 of the tube, the control electrode having previously been biased negatively to hold " off " the tube by a condenser 89 charged from the supply 15 over a normally conducting tube 28. A third tube 25 is similarly controlled by the condenser 89 and switch 87 and, when conducting, charges a condenser 95 which, in consequence, biases "off" " tube 28 and stops further charging of condenser 89. The remainder of the welding control system shown, which is devoid of electromagnetic relays, includes a number of valvecondenser-resistance circuits for controlling the welding current intensity and the durations of the various operations involved in making a weld, such as the " squeeze," " weld," " hold " and " off " times, a condenser being charged over a valve and controlling the conductivity of another valve for a period determined by a resistor through which the condenser subsequently discharges. Certain valves have their cathode heaters supplied through a resistor which delays emission from these cathodes in relation to those of the other valves.
Patent GB-166302-A (GB)
Title: Improvements in two-stroke internal combustion engines, especially those adapted foror auxiliary to the drive of cycles
IPC: F02B25/00
Filed: 1920-02-12
Abstract: 166,302. Wong, O. L. Feb. 12, 1920. Vaporizers, external; carburetting-apparatus; heating charge.-In an engine in which pump charges are compressed in the end of the cylinder remote from the combustion space, air is warmed in an exhaust-heated chamber x and drawn through a surface carburettor, Fig. 9, having an outlet f<2> which discharges into the pump end of the cylinder a through a non-return valve, not shown. The pump space communicates with a chamber b having a cover plate b<1> the position of which may be adjusted to alter the pump clearance, by varying the thickness of the packing b<3>. The burnt gases escape through three ports d' each controlled by a cam-actuated valve d<2>, leading to a chamber d surrounded by air for the formation of the combustible mixture. At starting a light fuel comprising benzene and alcohol may be supplied to an absorbent pad e<8> in the air inlet passage e. Alternatively, the chamber x may be heated by igniting in the trough e<4> fuel used for normal working poured upon absorbent material e<5>. The carburettor shown in Fig. 9 comprises a wick f<7> which extends into a fuel supply pipe f<9> and surrounds a metal tube f<6> one end of the wick being enclosed by wire gauze f<8>. The wick is adjusted by a screw f<10> to vary the richness of the charge; no combustible mixture enters the cylinder when the collar f<11> engages the stop f<12>. Alcohol alone, or mixed with 10 to 45 per cent of benzoline may be used as a fuel.
Patent GB-668950-A (GB)
Title: Improvements in or relating to coaxial conductor cables
Inventor: HILL WILLIAM GEORGE
IPC: H01B13/22
Filed: 1950-02-21
Abstract: 668,950. Coaxial cables. STANDARD TELEPHONES & CABLES, Ltd. Feb. 21, 1950, No. 4414/50. Class 36. A coaxial conductor cable in which the outer conductor is made by folding a metal tape longitudinally into a tube with the edges of the tape abutting to form a seam, is made in such a manner that the seam lies on that diameter of the tube which is parallel to the axis of rotation of the take-up capstan or drum. A metal tape 3, which is formed with crimped edges, as described in Specification 650,442, is drawn over a guide roller 7, then twisted so that its plane is turned through 90 degrees and fed into a die 8 together with a conductor 1 having insulating discs 2 thereon. The tape is folded about the core 1, 2, to form a tubular outer conductor 9 having a seam 10, and a lapping of screening tapes (not shown) is applied. The cable is wound on a take-up drum 11 rotated about an axis 12 which is perpendicular to the plane of the tape passing into the die 8.
Patent GB-791718-A (GB)
Title: Derivatives of 1:3-diaminopropane
Inventor: FANCHER OTIS EARL
Filed: 1956-02-13
Abstract: The invention comprises compounds of the formula: <FORM:0791718/IV (b)/1> wherein R and R1 are lower alkyl groups of up to 10 carbon atoms, X is a lower dialkylaminoethyl, methylenedioxyphenyl or isopropyl group and Y is lower alkyl, acetyl or nitrobenzoyl when X is dialkylaminoethyl, lower alkyl or hydrogen when X is methylene dioxyphenyl, and acetyl or hydrogen when X is isopropyl. The compounds are prepared by reacting a diamine of the formula: <FORM:0791718/IV (b)/2> with an aldehyde of the formula XCHO and hydrogen, and when appropriate, alkylating or acylating to introduce the alkyl, acetyl or nitrobenzoyl group Y.  When Y is to be a methyl group the alkylation may be effected by reaction with formaldehyde and formic acid.  Examples describe the preparation of g -di-ethylaminopropylisobutylamine; N-isobutyl-N-(g  - diethylaminopropyl) acetamide; N : N-di - (g  - diethylaminopropyl) acetamide; N-(g  - di - n - propylaminopropyl) piperonylamine; N (g - di - n - propylaminopropyl)-N - methylpiperonylamine, N : N - di(g - diethylaminopropyl) - p - nitrobenzamide; N : N-di(g  - di - n - propylaminopropyl) - p - nitro-benzamide; N : N - (g  - di - n - propyl amino-propyl) methylamine; N - (g  - di - n - butyl-aminopropyl) piperonylamine and N - (g  - di-n - butylaminopropyl) - N - methylpiperonylamine.
Patent GB-1005953-A (GB)
Title: Improvements in or relating to organo-silicon compounds
Inventor: HASZELDINE ROBERT NEVILLE
IPC: C07F7/12
Filed: 1961-02-07
Abstract: Organochlorosilanes are prepared by reacting an organosilane of the type RSiH3, R2SiH2 or R3SiH, where R is an alkyl, aryl, cycloalkyl or aralkyl group which may contain fluorine or chlorine, with a fully or partially chlorinated hydrocarbon or the acid chloride of an organic or inorganic acid in the presence of a free radical initiator, whereby at least one hydrogen atom directly bonded to the silicon atom of the silane is replaced by a chlorine atom.  Specified chlorinated hydrocarbons are mono-, di-, tri- and tetrachloromethanes, and chlorinated higher alkanes. Specified organic and inorganic acid chlorides are acetyl chloride, onalyl chloride, methanesulphonyl chloride, phosgene, sulphuryl chloride and phosphoryl chloride.  Examples of free radical initiators are U.V. light, gamma-radiation, organic peroxides and azo compounds. The reaction occurs at -30 DEG  to 200 DEG  C. and 1 mm. Hg. to 100 atmospheres pressure, an inert solvent, e.g. fluorocarbon, fluorohydrocarbon, n-butane, cyclohexane and organic silicates.  In examples: (1) methyl silane and phosgene, (2) bis-(3,3,3-trifluoropropyl) silane and phosgene; and (3) monomethyl silane and carbon tetrachloride are sealed in vacuo and irradiated with U.V. light and the products fractionated to yield (1) methyltrichlorosilane, (2) a mixture of mono and dichloro bis-(3,3,3-trifluoropropyl) silanes; and (3) a mixture of of di- and tri-chloromonomethyl silanes.  Specifications 978,621 and 978,622 are referred to.
Patent GB-294625-A (GB)
Title: Process for the production of trinitrotoluene
Filed: 1928-02-13
Abstract: 294,625. Akt.-Ges. Lignose. July 29, 1927, [Convention date]. Trinitrotoluene is produced by adding fused dinitrotoluene' at 80-95‹ C. to the nitration acid at 80‹ C. whilst stirring, and cooling if desired, the course of the reaction and the heat developed being regulated by regulating the rate of supply of dinitrotoluene.
Patent GB-588505-A (GB)
Title: Electric control and distribution panel
IPC: H02B1/00
Filed: 1945-02-23
Abstract: 588,505. Fuze-boards. McDONALD. J., and G. W. B. ELECTRIC FURNACES, Ltd. Feb. 23, 1945, No. 4621. [Class 38 (i)] [Also in Group XXXVII] In a, domestic supply system the fuses 14 are enclosed by a hinged cover 12 attached to a cover 1 of a totally-enclosed switch panel. The cover 12 is opened without disturbing the cover 1. which is sealed or locked at 16, 17, (see Group XXXVII).
Patent GB-1062301-A (GB)
Title: Fluorination of aromatic compounds
Inventor: FULLER GEORGE
IPC: C07C51/093
Filed: 1964-02-04
Abstract: Polyhalogeno - aromatic compounds, e.g 3-chloroheptafluorotoluene, 3,5 - dichlorohexafluorotoluene and 3H-heptafluorotoluene (see Division C2) are used as hydraulic fluids and lubricants.ALSO:Fluorinated aromatic compounds are prepared by reacting a fully halogenated aromatic compound containing as substituents (a) one or more trihalogenomethyl groups and (b) halogen atoms, at least one of which is chlorine, bromine or iodine, with an alkali metal fluoride to replace the higher halogen atoms wholly or partially by fluorine.  The halogenated aromatic compound preferably has the formula <FORM:1062301/C2/1> where X = C1, Br or I a = 1, 2, 3,4 and 5 b = 1 or 2 n = 0, 1, 2 or 3 and where (a+b) must not be greater than 6. The starting material may be heated with the alkali metal fluoride (a) in a polar aprotic liquid organic reaction medium inert to the reactants, (b) in a vessel under pressure, e.g. an autoclave at 200 DEG  to 600 DEG  C. or (c) by passing vapour of the halogenated aromatic compound over a heated bed of the alkali metal fluoride, the latter preferably being finely ground at a temperature in the range of 300 DEG  to 600 DEG  C. Compounds claimed per se are: 3-chloroheptafluorotoluene; 3,5-dichlorohexafluorotoluene; 3,31 - bis(trifluoromethyl) octafluoro - biphenyl; 3-bromoheptafluorotoluene.
Patent GB-344182-A (GB)
Title: Improvements in or relating to optical-projection apparatus
IPC: G03B21/132
Filed: 1930-02-11
Abstract: 344,182. Changing signs. BELL, L.H. BAINBRIDGE-, Norfolk Villa, Montagu Road, Datchet, Buckinghamshire. Feb. 11, 1930, No. 4647. [Class 3 (i).] Optical-projection apparatus.- Writing or the like whilst being effected on one side of a surface is projected by reflection from the other side. The writing may be executed with ink or paint on an opal glass plate, or by a stylus on a plate previously coated with white paint. In one arrangement the writing screen E, Fig. 2, is placed over an aperture D in the upper surface of the box A, and is reflected thence on to a viewing screen K of translucent material. A polished ball on the stylus, or alternatively an electric torch, forms a pointer. An alternative arrangement is described more especially for lecture purposes.
Patent GB-413051-A (GB)
Title: Improvements in or relating to safety guards for guillotine cutting and like machines
IPC: B26D7/22
Filed: 1933-02-16
Abstract: 413,051. Machinery guards. DAWSON, PAYNE, & ELLIOTT, Ltd., and PAYNE, R., Atlas Works, Otley, Yorkshire. Feb. 16, 1933, No. 4710. [Class 80 (iv).] A safety guard for a guillotine cutting and like machine, in which a descending knife or other tool operates upon the work, comprises a bar 9 positioned near the front edge of the table 2 and carried by slotted links 10 sliding in pins 11 fixed in either side of the table and pivoted at their lower ends to levers 10<x> secured to a transverse shaft 12. A lever 13 secured to the shaft 12 engages a cam 15 connected by a link 16 to a reciprocating part of the machine. Downward movement of the knife causes the guard to be lifted and a groove in the lower end of the slot engages the pin 11 and the guard remains in its raised position until the operator releases it from the pin 11 when it falls by gravity. The slot may be masked by a plate 17 in which case the guard is lowered automatically.
Patent GB-1532778-A (GB)
Title: Manufacture of bows for use in playing stringed instruments
IPC: G10D3/16
Filed: 1976-01-29
Abstract: 1532778 Stringed instrument bow P S THOMSEN 29 Jan 1976 [5 Feb 1975] 4833/75 Heading G5J A bow for a stringed instrument having an elongate frame 4 and an elongate string engaging face 3 is made by attaching a layer of fibres 2 to the surface of a carrier strip 1 with a resinous glue to form a composite face which is attached to the bow frame, and removing the carrier strip. The fibres may be plastics, e.g. nylon monofilaments. The adhesive is weak to enable the carrier strip to be peeled off after fitting to the bow frame. The fibres, carrier strip, and adhesive may be formed in a continuous length by extrusion using three nozzles, the length being subsequently cut as required. The carrier strip may however be woven and the fibres and adhesive extruded on to it. The bow frame is essentially conventional with the composite strip clamped at both the frog and head ends. Alternatively the composite strip may be doubled and clamped at only one end.