baber/WOPTO huggingface dataset:
Patent GB-1485682-A (GB)
Title: Audio amplifier
IPC: H03F3/30
Filed: 1975-01-22
Abstract: 1485682 Transistor amplifiers GENERAL ELECTRIC CO 22 Jan 1975 [22 Jan 1974] 2680/75 Heading H3T An audio amplifier with idling current controlled to be small, comprises a constant current source Q8, push-pull output transistors Q2, Q3 of the same conductivity type connected in series and with active regions of approximately equal area, a driver transistor Q1 driving Q3, and driving Q2 via an intermediate stage comprising a transistor Q5 of the same conductivity type as and related in active region area to Q3, and a control means Q6, connected to said current source for distributing portions of current to the output of Q5, and the input of Q2, whereby the idling currents of Q2 and Q3 are determined, the idling current of Q3 being determined by the output current of Q5 and the area ratio of Q3 to Q5. The V eb  of Q2 and Q6 being approximately equal the P.D. across 16 is small so that the collector potentials of Q3 and Q5 are approximately equal. A constant currant determined by the large resistor 29 flows through Q7 and is mirrored in Q8, the area ratio of Q8 to Q7 being 9 to 1. Negative feedback is provided from the output to the base of Q1 via resistor 21, one effect being to reduce waveform asymmetry between the positive and negative half cycles, Figs. 3a, 3b (not shown). Transistor Q6 is a lateral type with current gain # adjusted to be low and independent of operating conditions. The amplifier may be fed by a preamplifier receiving an input signal from an AM or FM detector 22 via a volume control 23. A differential pair of transistors Q9, Q10 receives the signal at the base of Q9 and additional negative feedback at the base of Q10. The pair Q9, Q10 is fed by a current source Q16 in series with a 3k resistor, the potential thereacross being stabilized by D3 and the baseemitter potential of Q17. The collector currents of Q9 and Q10 are replicated by the current mirror or "turn-around" Q14, Q15. Thus the feedback applied to the base of Q10 reaches Q9 via the coupled emitters of Q9, Q10 and via Q15, Q14. The additional feedback path is through a resistor 27 and a transistor Q12 the latter having current source Q17. The output of Q9 is coupled to the input of Q1 via Q13, the current source for which is Q19. The D.C. voltage at output terminal 18 is stabilized to be slightly below half the supply voltage of source 12 by the controlled current of transistor Q20 flowing from 18 to earth via resistors 27 and 33, the base-emitter voltage of Q20 being stabilized by D1 in another current mirror arrangement. A further means for stabilizing the D.C. voltage is provided by current source Q18 feeding current from its collector via 33 and 27 to terminal 18. Resistor 33 isolates Q18 from the input to Q12. The combined amplifiers are intended for integrated form. A large capacitor 34 may be connected externally to the coupled collectors of Q18, Q20 to reduce output hum.
Patent GB-119979-A (GB)
Title: Improvements in or relating to Printing Machine Sheet-delivery Mechanism.
IPC: B65H29/24
Filed: 1918-02-15
Abstract: 119,979. Mann & Co., G., Furnival, R. B., and Payne, R. P. Feb. 15, 1918. Delivery appara. tus.-In a printing-machine sheetdelivery mechanism in which the sheets are carried from the impression cylinder to the delivery table by grippers on endless chains, a series of longitudinal or transverse perforated pipes is arranged to deliver compressed a i r under the sheets while being carried by the grippers so as to keep the sheets in a state of buoyancy to prevent contact of the printed surface with parts of the mechanism. As shown, a series of transverse pipes 7 is arranged beneath the outward run of the gripper chains 4 and preferably extend partly round the sprocket wheels 9. Air is supplied to the pipes 7 from any suitable source by a pipe 8. To limit the upward movement of the sheets due to the air-blast, travelling or stationary tapes 10 are arranged above the chains, and curved guides 11 are arranged round the sprockets. The air, blast assists also in drying the ink.
Patent GB-510140-A (GB)
Title: Improvements in and relating to the manufacture of artificial silk
IPC: D01F13/02
Filed: 1939-01-26
Abstract: 510,140. Distilling liquids; carbon bisulphide. NAAMLOOZE VENNOOTSCHAP KUNSTZIJDESPINNERIJ NYMA, and DEINSE, H. VAN. Jan. 26, 1939, No. 2725. [Classes 1 (ii) and 32] [Also in Group IV] Carbon bisulphide is recovered from viscose artificial filaments by sucking a warm washing liquid through the wound material so as to vaporize the carbon bisulphide and remove it from the material, separating the vapours from the washing liquid, drawing off the vapours by means of a liquid-ring pump, and separating the condensed carbon bisulphide from the liquid used in the pump. Water may be used for the washing liquid and for the pump liquid. The liquid-ring pump is a wing pump containing an annular body of liquid acted on by centrifugal force and alternately entering channels formed in the pump casing and in the wings. The liquid-ring pump creates the necessary suction for drawing the washing liquid through the artificial silk. The washing liquid is subsequently removed by a separate pump. Most of the carbon bisulphide is condensed in the liquid of the liquid-ring pump. This liquid after leaving the pump is passed to a settling tank from the bottom of which the carbon bisulphide is withdrawn. A small condenser may be inserted behind the liquidring pump for the recovery of any carbon bisulphide which has not been condensed in the liquid of the pump.
Patent GB-1304403-A (GB)
IPC: B23Q5/20
Filed: 1970-01-20
Abstract: 1304403 Machine tool details CINCINNATI MILLING MACHINE CO 20 Jan 1970 [22 Jan 1969] 2734/70 Headings B3B and B3C  In a machine tool a spindle 17 can be stopped at a predetermined angularity by means of a cam 27, a follower 29 and a plunger 53. The follower is pressed toward the cam after a machining operation when the spindle is disconnected from its drive. The cam is heart shaped and the follower is to be located in the concave zero position. If the follower engages the cam at any point other than peak 52 then the force of the follower on the cam will cause the cam to rotate until the follower is located in the zero position. If the follower engages peak 52 or closely adjacent thereto then a plunger 53 presses against the cam to cause it to rotate. The follower and plunger are hydraulically operated with solenoids controlling the operation of necessary valves. A drive motor is connected to the spindle through a disconnect means and a tachometer connected to the motor generates a voltage proportional to the drive motor speed, a voltage sensitive relay receiving the voltage from the tachometer and operates when the motor slows to a predetermined speed and starts a timer, a solenoid valve being operated when the timer times out to reduce the flow of hydraulic fluid to the clutch thus effecting the disengagement of drive to the spindle.
Patent GB-1064404-A (GB)
Title: Extrudable compositions
IPC: C08K5/3462
Filed: 1965-01-02
Abstract: 1,064,404. Polyolefine compositions of improved dyeability. MONTECATINI SOCIETA GENERALE PER L'INDUSTRIA MINERARIA E CHIMICA. Jan. 21, 1965 [Jan. 27, 1964], No. 2747/65. Heading C3P. [Also in Division C2] A polyolefine composition having good receptivity to dyestuffs comprises 0À1 to 10% of a metal compound obtained by reaction of an acid of formula in which n is 1 or 2, with a Group II B  or VIII metal, e.g. Ni, Co or Zn. In examples, optional ingredients are didodecyl thiodiglycolate, calcium stearate and titanium dioxide.
Patent GB-1487823-A (GB)
Title: Block copolymers and organic compositions containing the same
IPC: C10L1/24
Filed: 1974-08-02
Abstract: 1487823 Block copolymers MOBIL OIL CORP 2 Aug 1974 [13 Aug 1973 24 June 1974] 02755/77 Divided out of 1485155 Heading C3P [Also in Division C5] Block copolymers comprise at least one segment (A) of a random or block diene/ styrene copolymer, which has been hydrogenated, and at least one segment (B) of an alkylene oxide or sulphide polymer. The copolymers are obtainable by anionic polymerization, optionally in the presence of a randomizing agent, to form the (A) block(s), followed by deactivation, hydrogenation, and then the formation of block(s) (B) using the usual catalysts therefor, e.g. KOH or potassium alkoxides; alternatively the block(s) (A) may be hydrogenated after the addition of the block(s) (B). The active terminal groups of the polymers may be reacted with such reagents as polyisocyanates, alcohols, carboxylic acids, carbonyl halides or halo-substituted heterocyclic amines to form stable terminal groups. The examples describe the copolymerization of butadiene and styrene in cyclohexane in the presence of s-BuLi/KOŒBu or s-BuLi/tetrahydrofuran, the reaction of the polymer with ethylene oxide and, in some cases, acetic acid, hydrogenation using a Pd on charcoal, a Ni on Kieselguhr or nickel acetonylacetonate/Et 3 Al catalyst, followed by ethylene oxide polymerization in benzene using potassium t-butoxide or t-amyl oxide, followed by reaction with toluene diisocyanate. Reference has been directed by the Comptroller to Specification 1,436,763.
Patent GB-515196-A (GB)
Title: Improvements in or relating to the production of heteropolymeric reaction products
IPC: C08G75/22
Filed: 1938-01-28
Abstract: 515,196. Resinous condensation products. STEVENS, A. H., (Phillips Petroleum Co.). Jan. 28, 1938, No. 2764. [Class 2(iii)] Resinous materials are produced by reacting sulphur dioxide with one or more compounds containing olefinic or acetylenic linkages in the presence of one or more of the following as catalysts :-dilute nitric acid ; metal nitrates, e.g. alkali metal (such as lithium and potassium), silver, beryllium, thallium, calcium, mercury, zirconium, titanium, barium, strontium, lead, and cobalt nitrates ; ammonium nitrate, hydroxylamine nitrate ; organic amine nitrates, e.g. n-butylamine, di-n-butylamine, tri-n-butylamine, benzylamine and aniline nitrates ; alkyl and aryl.nitrates, e.g. ethyl nitrate ; nitrates of organo-metallic compounds, e.g. phenyl mercuric nitrate ; dilute nitrous acid ; metal nitrites, e.g. alkali metal nitrites such as sodium nitrite ; alkyl and aryl nitrites, e.g. ethyl and iso-amyl nitrite ; nitrogen tri-, tetra- and pentoxide ; perchloric acid ; chlorates and perchlorates, e.g. of alkali and alkaline earth metals such as lithium, sodium and potassium, and of magnesium ; mercury alkyls, e.g. mercury diethyl and di-n-butyl; lead tetraethyl and tetraphenyl ; triphenyl-bismuthine, uranyl acetate, sodium nitroprusside, nitrolic acids, nitrolates, and pseudo-nitrols. Olefinic compounds may be reacted in the presence of diluents such as paraffin hydrocarbons. Specified unsaturated bodies are : mono-olefines, e.g. propylene, 1- and 2-butene, 1- and 2-pentene, 1- and 2-hexene, 1-heptene, 1-decene, cyclohexehe, and styrene ; poly-olefines, e.g. 1:5-hexadiene, cyclopentadiene, butadiene, isoprene, 2:3 dimethylbutadiene ; monoalkylacetylenes ; allyl alcohol, allyl ethyl ether, vinyl chloride, allyl chloride, vinylacetic acid, allylacetic acid, undecylenic acid and its methyl ester. Specification 11635/14, [Class 2(iii)], is referred to.
Patent GB-178919-A (GB)
Title: Improvements in or relating to shoe-upper pulling machines
IPC: A43D75/00
Filed: 1921-01-22
Abstract: 178,919. Gouldbourn, J., Minett, W. T., and British United Shoe Machinery Co., Ltd. Jan. 22, 1921. Pulling-over. - Relates to multiple fastener. inserting mechanism of the type described in Specification 12304/03, wherein the mechanism swivels on engagement with the shoe so that fasteners are inserted at equal or other desired distances from the margin of the shoe bottom, and consists in positive means for centralizing the swivelled parts as they are retracted from the shoe, which means, further, acts in time relation to the movement of the parts. As shown, the invention is applied to the type of mechanism described in Specification 150,424, comprising gear segments 39 which mesh when the fastenerinserting mechanism is in retracted position. The mechanism carries wipers 7, 9 controlled by rolls 13 under the influence of a spring 21 adjusted in tension by a handle 27 actuating co-operating cam-rings 25, 29. A fixed member having a parallel-sided slot and flared entrance portions engages the cylindrical surface of the ring 29 as the fastener-inserting mechanism is retacted frcm the shoe to centralize it and ensure the proper, meshing of the gear segments. Specifi. cations 3301/10, 24783/10, 3876/14, 4540/14, 103,349, 128,694 and 134,066, also are refexred to.
Patent GB-707617-A (GB)
Title: Ejecting mechanism for punch presses
IPC: B21D45/00
Filed: 1952-02-04
Abstract: 707,617. Punching. SUTOWSKI, W. S. Feb. 4, 1952, No. 2928/52. Class 83 (4) In a press for making washers &c. a punch 18 on a slide 16 is reciprocated by a crank rotated by an electromotor 14 and co-operates with a die 27 on a fixed bolster 30 to punch a work piece 25. The punched work piece 56 is ejected by a bush 35 operated by pins 36 engaging a head 32 operated by a lever 49. On the punching stroke the punch slide 16 operates a lever 41 which pushes an adjustable rod 46 to the left, Fig. 2, to compress a rubber pad 53 and to move the lever 49 to withdraw the head 32. On the backward stroke the pad 53 expands to operate the lever 49 and to actuate the ejector pin.
Patent GB-740205-A (GB)
Title: Process for recovery of inositol
Filed: 1954-02-01
Abstract: A process of recovering inositol from hydrolyzates of crude insoluble salts of phytic acid from the group consisting of calcium phytate, magnesium phytate, mixed calcium-magnesium phytate and mixtures thereof which have been obtained from cereal grain steep liquor is characterized by the steps of adjusting the pH of hydrolyzate to about 9 with lime, separating out the insoluble impurities, concentrating the clarified liquor, adding thereto methyl alcohol, ethyl alcohol, isopropyl alcohol or mixture thereof, allowing crystals of inositol to form and separating the crystals.  Where the inositol concentration in the neutralized hydrolyzate is low the liquor is preferably dried and the residue dissolved in hot aqueous alcohol and the inositol allowed to crystallize.  In preparing the starting materials calcium phytate may be obtained by adding lime to steep-water, crude magnesium phytate by adding magnesium hydroxide and crude mixed calcium-magnesium phytate by adding sodium or potassium hydroxide to steep-water.  The phytate is washed and hydrolysed to inositol and calcium phosphate by heating with water. The adjustment of the hydrolyzate to about pH 9 is made in one step or two steps in accordance with the process of Specification 686,396 and the mixture is filtered, the filtrate concentrated, isopropyl alcohol added and inositol crystallizes out on cooling.  Yields and purities of inositol obtained using the three alcohols are summarized in a table.  Specification 601,273 also is referred to.
Patent GB-957124-A (GB)
Title: Yarn winding machine
Inventor: MARSDEN JOHN CHARLES
IPC: B65H63/036
Filed: 1962-01-26
Abstract: 957,124. Drum winders; stop motions, JOSEPH STUBBS Ltd. April 18, 1963 [Jan. 26,1962], No. 2993/62. Headings DID and D1J. A yarn drum-winding machine is provided with hydraulic means which, in the event of breakage or exhaustion of the yarn, operate to lift the package out of engagement with the driving drum. Yarn 27 is wound on to a conical package 26 which is supported by an H-shaped winding heat 12 and is driven by frictional contact with a drum 16 provided with helical thread-guiding grooves. The winding head 12 is slidablc on pillars 22 and is connected to a piston rod 19 of a hydraulic ram arrangement mounted within a closed casing 11 of the machine. Adjoining the base of the cylinder 17 of the hydraulic ram is a valve body 33 having a valve member 34 adapted to control the inlet to the cylinder of pressurised fluid from conduits 42, 43 and the exhaust of fluid from the cylinder to the casing 11 and via the casing to drain conduits 39, 40. A rod 45 pivotally connected to an extension of the valve member 34 is continuously oscillated during winding by means of a rotating cam 48; when yarn breakage occurs a drop wire 52 is released to the position shown dotted and simultaneously moves an L-shaped lever 50, 54 into the path of the rod 45 providing it with a new fulcrum point, thereby effecting movement of the valve member 34 into a position in which the cylinder 17 is pressurised. Thus the winding head is lifted to disconnect the package from the driving drum. A detent 56 is provided to hold the valve member 34 in this raised position until by manual rotation of the detent the valve and lever 50 are reset. The construction of the detent lever may be modified as in Fig. 7 (not shown). In a further modification (Figs. 8 and 9 not shown) the winding head is pivotally mounted.
Patent GB-280408-A (GB)
Title: Improvements in or relating to apparatus for mixing powder with liquid
IPC: B01F5/04
Filed: 1926-09-01
Abstract: 280,408. Foamite, Firefoam, Ltd., (Foamite-Childs Corporation). Sept. 1, 1926. Drawings to Specification. Mixing solids with fluids in flow. - In an apparatus for adding powder to a stream of liquid within a conduit, the conduit is provided, at a point which is down stream with respect to the point of admission of the powder, with a fixed guide of twisted form to impart a rotary motion to the stream. The powder is admitted to the stream passing through the conduit as described in Specifications 280,313 and 280,407, and the twisted guide is mounted in a short casing inserted in the length of the conduit.
Patent GB-896004-A (GB)
Title: Improvements in machines for electrically welding rotating workpieces
Inventor: HALLEWELL GEORGE
IPC: H01R43/02
Filed: 1958-01-29
Abstract: 896,004. Welding by fusion. MITCHELL, SHACKLETON & CO. Ltd. Oct. 14, 1958 [Jan. 29, 1958], No. 3019/58. Class 83 (4). The earth connection to a rotating workpiece being welded consists of a conductive disc clamped around the workpiece and contacted by an earthed brush mechanism. In a crank-shaft welding machine, as described in Specification 893,356, the earth connection consists of a copper disc in two parts 4 and 5, carrying clamps 6, 7 bolted around the journal or crank-pin of the crank-shaft. The clamps are so positioned that the disc centre lies on the axis of the crank-shaft. Earthed brushes 9, 10 on spring-loaded pivoted arms 11, 12 contact the opposite faces of the disc 4, 5.
Patent GB-996476-A (GB)
Title: Improvements in or relating to electrical storage cells
IPC: H01M50/491
Filed: 1962-01-26
Abstract: 996,476. Batteries. SOC. DES ACCUMULATEURS FIXES ET DE TRACTION. Jan. 26, 1962 [Jan. 27, 1961], No. 3144/62. Heading H1B. In a nickel-cadmium alkaline cell similar to that disclosed in Specification 855,812, the separator is made wholly from felted fibres of a non-electrolyte absorbent material, e.g. nylon, polypropylene, which is inert to the electrolyte. As in the above Specification, the thickness of the separators is less than 0À4 mm. and the volume of electrolyte associated with each electrode is between 1 and 2 c.c. per amp. hr. capacity. Specifications 715,903 and 996,475 also are referred to.
Patent GB-1095251-A (GB)
Title: Method of preventing electric charging of inflammable organic liquids
Inventor: MARUMO HIDEO
IPC: C10L1/232
Filed: 1965-01-25
Abstract: The electric charging of inflammable liquids, e.g. fuels and dry cleaning benzine, is prevented by the addition of 1-100 p.p.m. of a metal salt (other than an alkali metal salt) of an amphoteric surface-active agent of formula <FORM:1095251/C4-C5/1> where R is a C7-C21 hydrocarbon radical, R1 is hydrogen, methyl, ethyl or propyl, A is an oxygen atom or an -NH- group, the CHR1CHR1 groups being the same or different, M is a metal other than an alkali metal, m is an integer and x and y are integers dependant on the valency of M. Liquids specified are gasoline, kerosene, light oil, benzene, toluene, xylene, chlorobenzene, nitrobenzene, bromobenzene, hexane, heptane, dimethyl and diethyl ether, dioxane, turpentine, carbon disulphide and liquefied gases.  Metals specified are Mg, Ca, Ba, La, Cr, Mo, Mn, Fe, Co, Ni, Cu, Ag, Au, Zn, Cd, Hg, Al, Sn, Pb, or As.ALSO:The electric charging of carbon disulphide is prevented by the addition of 1-100 p.p.m. of a metal salt of formula <FORM:1095251/C1/1> where is a C7-C21 hydrocarbon radical, R1 is hydrogen, methyl, ethyl or propyl, A is an oxygen atom or an -NH- group, the CHR1 CHR1 groups being the same or different, M is a metal other than an alkali metal, m is an integer and x and y are integers dependent on the valency of M. Salts specified as those of formulae <FORM:1095251/C1/2> <FORM:1095251/C1/3> <FORM:1095251/C1/4> where M is Mg, Ca, Ba, Zn or Pb.  Other metal salts referred to are the La, Cr, Mo, Mn, Fe, Co, Ni, Cu, Ag, Au, Cd, Hg, Al, Sn and As salts.ALSO:The electric charging of chlorobenzene, bromobenzene, dimethyl ether, diethyl ether, nitrobenzene and dioxane is prevented by the addition of 1-100 p.p.m. of a metal salt of formula <FORM:1095251/C2/1> where R is a C7-C21 hydrocarbon radical, R1 is hydrogen, methyl, ethyl or propyl, A is an oxygen atom or an -NH- group, the CHR1CHR1 groups being the same or different, M is a metal other than an alkali metal, m is an integer and x and y are integers dependant on the valency of M. Salts specified as those of formulae <FORM:1095251/C2/2> <FORM:1095251/C2/3> <FORM:1095251/C2/4> where M is Mg, Ca, Ba, Zn or Pb.  Other metal salts referred to are the La, Cr, Mo, Mn, Fe, Co, Ni, Cu, Ag, Au, Cd, Hg, Al, Sn and As salts.
Patent GB-316128-A (GB)
Title: Improvements in moulds
IPC: E04G9/04
Filed: 1929-01-31
Abstract: 316,128. Schlick, G. July 23, 1928, [Convention date]. Void [Published under Sect. 91 of the Acts]. Casting concrete in situ.- Moulds for casting concrete structures in situ are formed of, or lined with, panels of wood pulp P, pressed or calendered to present smooth casting surfaces which may be coated with prepared coa.tings of acid or alkaline material.
Patent GB-677890-A (GB)
Title: Improvements in or relating to self-unloading bins or like containers
IPC: B65D88/72
Filed: 1949-02-05
Abstract: 677,890. Unloading storage bins; unloading vehicles. HURON PORTLAND CEMENT CO. Feb. 5, 1949. No. 3248/49. Classes 78 (i) and 78 (iv). A bin is unloaded by means similar to that described in Specification 677,891. As shown in Figs. 2 and 3, the body 1 of a trailer carrying cement 35 is formed with sloping walls 4, 4, 5, 5 defining two sloping wells which converge towards an outlet at the rear of the trailer. Below each well is a sheet metal duct 9 separated from the main body 1 by a porous wall 10 comprising finely woven heavy multiple ply canvas reinforced by a web of woven wire. Air supplied to the ducts 9 from low-pressure blower 18 driven by a motor 19 passes through the porous walls 10 to aerate the cement and cause it to flow freely down the wells, the inclination of which is slightly greater than the angle of repose of the material when thus aerated. The rear outlet from the body is controlled by a gate (not shown) and communicates through a flexible coupling 26 with a spout 25 formed with a lower air duct 28 with a flexible wall similar to the ducts 9 with flexible walls 10. A gas other than air may be supplied to the ducts 9, 28. In an alternative construction a rail wagon is formed with four wells above four air ducts 9 converging in a central outlet from which a spout 25 is directed towards the side of the wagon.
Patent GB-1204271-A (GB)
Title: Improvements relating to ceramic bodies
IPC: C03C10/00
Filed: 1968-01-22
Abstract: 1,204,271. Ceramics. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 22 Jan., 1968 [25 Jan., 1967], No. 3249/68. Heading ClJ. A ceramic body is made by moulding and then sintering a powder mixture consisting of either (a) a mixture of Al 2 O 3  with a fused, cooled powder of CaO and B 2 O 3 , or (b) a fused, cooled powder of Al 2 O 3 , CaO and B 2 O 3 , the powder mixture being within a quadrilateral ABCD, the points ABCD corresponding in mole per cent to the compositions: Al 2 O 3  CaO B 2 O 3  A .. .. 45 22 33 B .. ..45 41 14 C .. .. .. 27 54 19 D .. .. .. 27 29 44