baber/WOPTO huggingface dataset:
Patent GB-1292614-A (GB)
Title: Wide band amplifier
Inventor: TIERNEY JAMES CLIVE CAMERON
IPC: H03F1/18
Filed: 1969-03-25
Abstract: 1292614 Amplifiers; repeaters PYE Ltd 26 Nov 1969 [25 March 1969] 15559/69 Headings H3T and H4R [Also in Division H1] A wide band amplifier arrangement has a feedback resistor R1 connected between the output and input terminals of an amplifying stage A1, these terminals and the resistor R1 are connected to input and output striplines 1, 2 and the input and output impedances of the stage A1 are substantially equal to the characteristic impedance of the striplines 1, 2. In the common emitter amplifier stages A1, A2 shown and matched as above negative voltage feed back is provided by resistors R1, R4 and R2, R7. The characteristic impedance of the striplines 1, 2, 3 is chosen to substantially equal the characteristic impedance of connecting lines (L1, L2, Fig. 1, not shown) such as coaxial cables or twin line feeder connected to sockets S 1 , S 2 . The stripline sections 1, 2, 3 may be formed on a printed circuit board (5, Fig. 3, not shown) including a large conductive area 4 for earth on one side of the board, a positive supply rail (6) and the sections 1, 2 on the other side of the board and with the resistor R1 between the conductor sections 1 and 2. The transistor Tr1 of the amplifier stage A1 may be mounted in a cut out at the edge of the board (5). As an alternative the arrangement may be in the form of a film circuit in which the conductive areas 1, 2, 4 are deposited on an insulating substrate, e.g. by silk screen printing using a conductive ink and the resistors are then formed as film resistors, e.g. by using a resistive ink. Valve amplifying circuits may be used. The amplifier arrangement is suitable for repeater amplifiers for use in multi channel carrier telephony systems or in television signal distribution networks.
Patent GB-120554-A (GB)
Title: Improvements in Methods of Treating Gases Containing Hydrogen Sulphide.
Inventor: LEAMON WILLIAM G
IPC: C10K1/34
Filed: 1918-09-25
Abstract: 120,554. Leamon, W. G. Nov. 8, 1917, [Convention date]. Purifying processes.-Relates to eliminating sulphuretted hydrogen from natural gas, coke oven gas, producer gas, illuminating gas or the like. The gas preheated to a temperature of about 300‹ C, is supplied with a small quantity of air sufficient to oxidise the hydrogen of the impurity but not necessarily the sulphur and is passed over heated pumice, firebrick, broken pottery or the like, wherein the oxidation occurs. Proceeding immediataly to cold scrubbers or absorbents the sulphur vapour is condensed or fixed. The pumice &c. may carry metal catalysts as platinum, nickel or the like. The operation may be conducted with the gas at enhanced pressure. The preheater comprises a folded iron pipe 3 in a jacket or furnace 2 and the oxidiser comprises an iron U-tube 6 fitted with the pumice 7, in a furnace 8.
Patent GB-543526-A (GB)
Title: Improvements in systems for controlling a dynamo-electric machine tensioning a length of material
IPC: B65H23/185
Filed: 1940-10-23
Abstract: 543,526. Automatic control systems for dynamoelectric machines. BRITISH THOMSON-HOUSTON CO., Ltd. Oct. 23, 1940, No. 15579. Convention date, Oct. 28, 1939. [Class 38 (iv)] Current; speed; strip tension.-A dynamoelectric machine 12 driving or braking a reel 11 is maintained at constant current, so that tension of the material operated on is constant, by using an armature-reaction-excited dynamo 25 to control its field. The field of a boosting generator 19 in series with the dynamo-electric machine may simultaneously be controlled by the same means. Alternatively the controlling dynamo 25 may vary the field of a generator supplying a machine operating on the periphery of the reel in accordance with the position of a dancing roller in a loop of the material under tension. As shown in Fig. 1 the potential across a resistance 31 carrying the motor current excites a controlling field winding 25c in opposition to a constant potential field winding 25d so that in crease in the armature current of the machine 12 reduces the breaking voltage normally reduced by the machine 25 in the circuit of the field 20 of the motor and reduces also the excitation of the booster 19. A transformer 33 across the armature circuit of the machine 25 excites a field winding 25g in accordance with the rate of change of its voltage and a similar auto-limiting effect is obtained from the current variations of the machine 12 by a transformer 34. Acceleration and retardation of the machine 12 produced by variation of voltage on the supply 14, 15 energizes a transformer 36 which excites a generator 35 for an additional field winding 25h of the machine 25 to change the calibration of the control temporarily. To equalize the speed of the machine 12 with that of roll motor 24 during threading of the strip pilot generators 37, 38 driven by the respective motors are opposed in series with a further field 25c, but the circuit is closed by a relay 39 only on low voltage on the supply mains 14, 15, and a rectifier 40 prevents reversal of the field 25i when the reel motor speed falls below the switch speed. If the boost field winding 25c should become de-energized the back field 25d is controlled to maintain a constant excitation of the motor field 20 by the vibratory action of a relay 41 responsive only to excessive voltage of the machine 25 in the back direction. A switch 18 opens when the main motor fields is not excited. The armature reaction excitation of the machine 25 is produced by additional short-circuited brushes assisted by a shunt field winding 25f effective on the same axis. A series field 25e assists the controlling field 25c. In the modification A, a dancing roller is coupled through a mechanical autolimiting device to a potentiometer contact determining the excitation of the controlling field of the armature reaction machine.
Patent GB-144675-A (GB)
Title: Improvements in the process of automatically extinguishing fire in automobiles and other motor-driven vehicles
IPC: A62C3/07
Filed: 1920-06-09
Abstract: 144,675. Boyce & Veeder, (Assignees of Erwin, J. B., and Erwin, O. R.). March 20, 1914, [Convention date]. No Patent granted (Sealing fee not paid). Fire-extinguishing by vapours; sprinklers, automatic; sprinkling-apparatus, non-automatic. - In order to extinguish fires in motor-vehicles, volatile liquid, such as carbon-tetrachloride, is stored in a receptacle 4 under pressure, and is adapted to be forced through a pipe 8 to the interior of the hood 2 on the opening of a discharge valve, either by the automatic operation of a fusible sprinkler head 15 or by the manual displacement thereof by means of a handle 12 and lever 16. The volatile liquid forms a fire-ex. tinguishing vapour on coming into contact with the fire or the heated parts. The receptacle 4 is provided with an air-inlet valve 23 and a pressure gauge 22.
Patent GB-612385-A (GB)
Title: Improvements in or relating to the production of para-aminobenzenesulphonamidohalopyrazines
IPC: C07D241/22
Filed: 1946-05-24
Abstract: An aminobenzenesulphonamido-halopyrazine is prepared by heating a mixture of an aminobenzenesulphonamide and a polyhalopyrazine, preferably in presence of an acid-binding substance such as an alkali carbonate, and preferably within the temperature range of 125-160 DEG C.  Examples are given of the preparation of 2 - sulphanilamido - 3 - chloropyrazine, 2 - sulphanilamido - 5 - chloropyrazine, 2 - sulphanilamido-6-chloropyrazine, and 2-metanilamido-5-chloropyrazine. Dichloropyrazines are prepared by vaporizing an aqueous solution of pyrazine, mixing with chlorine and heating in a glass or stainless steel tube for 2-3 seconds at 400-500 DEG  C.  The fraction of the oily product boiling between 94 DEG  and 107 DEG  C. at 50 mm. pressure contains the 2,3-, 2,5- and 2,6-dichloropyrazines, which may then be separated by fractional crystallization by cooling.
Patent GB-887043-A (GB)
Title: Improvements in or relating to ratemeters
Inventor: COOKE-YARBOROUGH EDMUND HARRY
IPC: G01R23/09
Filed: 1958-05-16
Abstract: 887,043. Frequency detectors; transistor circuits. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. May 7, 1959 [May 16, 1958], No. 15779/58. Classes 40(5) and 40(6). [Also in Group XL(b)] In a pulse ratemeter for testing radioactivity a storage capacitor C2 is initially set to a fixed voltage (-5 V) by a switch S1/1 and Zener diode D1. If then the switch is opened and negative going pulses P of amplitude say -10 V applied through capacitors C1, C2 to the base of an earthed emitter transistor T1 the latter conducts and the voltage across C2 becomes -6 V if C1/C2 has the capacity ratio 1/10. This increased negative charge is retained on the pulse ceasing since the base of T1 is stabilized at earth potential by negative feedback through an emitter follower transistor T2 and C2 back to the base of T1. The potential on the emitter of T2 tends to decrease -5 V, -6 V, -7 V-with successive pulses P but continuously increases positively due to C2 being charged from the -15 V source through R5, R3 and amplifier Tl, T2. The resultant output is applied through emitter follower transistor T3 to smoothing capacitor C3 and through rectifier D2 or D6 to one or other of blocking oscillator transistors T4, T5 operating relay RA or RB depending on whether the mean voltage on C3 is negative or positive. The relays operate lamps indicating whether the radioactivity is above or below a fixed tolerance level, and the blocking oscillations do not cease, even after the pulses P cease, until the switch S1 is operated to re-set the ratemeter by closing contacts S1/2 and S1/3. The voltage drop across R5 compensates for increased base current of T1 and linearises the rise of voltage on the emitter of T2 from the source -15 V. A timing circuit initiated when Sl is opened may terminate the pulse count after a fixed time and the trend may be indicated by a volt meter connected to C3. Alternatively the variable bias and tolerance adjusting resistors R6, R8 of T4, T5 may be returned to decreasing voltages from Miller timebase circuits. Alternatively the capacitor C2 can be replaced by a Dekatron or other digital store driven in opposite directions by the pulses P and an opposing pulse train. Epicyclic differential gears may also be employed in place of the storage capacitor C2.
Patent GB-153040-A (GB)
Title: Improvements in and connected with tunnel columns for supporting drills and for analogous uses
IPC: E21B7/02
Filed: 1919-06-23
Abstract: 153,040. Hanson, J., and Dorman & Co., W. H. June 23, 1919. Drills.-A tunnel column for supporting drills and like uses comprises a cylinder u, a ram c held against rotation, a needle &c. valve b admitting fluid to the cylinder to force the ram outwards, and a nut i threaded to the ram and adapted to lock the parts in expanded position. A gripping foot h is fixed by a ball-and-socket joint to the outer end of the ram, and a further gripping-foot is fixed or hinged to the outer end of the cylinder.
Patent GB-376443-A (GB)
Title: Improvements in shaft couplings
IPC: F16D3/76
Filed: 1931-05-30
Abstract: 376,443. Universal joints. THIRY, L., 19, Rue Vankeerberghen, Huy, Belgium. May 30, 1931, No. 15906. Convention date, June 2, 1930. [Class 65 (ii).] A universal or flexible joint between two shafts, such as brake control shafts upon a vehicle, comprises a ring of elastic material which is radially compressed without substantial axial extension ; it may be divided in order to increase the pressure which it exerts radially. A rubber ring 8, Fig. 2, is stretched to embrace the inner member 7 and is caused to grip the outer member 6 by being slit at one or more points 9 by a knife or heated wire inserted in grooves 15 in the inner member or in both members. The spaces left by separation of the ring segments 14 may be filled with unstressed rubber &c. Slitting is unnecessary if the outer member be initially smaller than the stretched ring or be compressed when in place, or if the inner member be expanded by matrices, presses, &c. The member 6 may be caused to adhere to the rubber by size or by partial vulcanization, or may be provided with ribs 16, pins, points, or grooves to improve the grip. The axial spread of the ring under pressure may be reduced by providing slots, grooves, or cavities 11, Fig. 3, in any or all of the inner or outer members or the mass of rubber. As applied to cardan-shaft joints, the inner and outer members may be cylindrical or, to increase the angular freedom, they may be double conical or spherical, as shown in Fig. 6, axial displacement being checked by projections 17, 18. A ball-andsocket joint 19 may be provided to centre the coupling, the chambers a, b containing lubricant. The inner and outer members may be connected by a rigid lost-motion coupling operative on failure of the rubber.
Patent GB-425214-A (GB)
Title: Improvements in or relating to coating compositions and processes for the productionthereof
IPC: C09D195/00
Filed: 1933-06-01
Abstract: A composition for coating and similar purposes is made by mixing pitch and coal tar with aliphatic chlorinated hydrocarbons and a commercial mixture of benzene homologues and heating the mixture under pressure.  Petroleum asphalt may be added to the pitch and tar or one of the latter may be omitted.  The tar used consists of the residue obtained by distilling crude coal tar to remove light and middle oils and some anthracene oil.  Chlorinated hydrocarbons specified are:--carbon tetrachloride, tri- or tetra-chlor ethylene. The benzene homologues used are:--benzene first runnings, solvent benzene or heavy benzol.  The mixture is heated in an autoclave at 130--220 DEG  C. under a pressure of 1,5 to 8 atmospheres for about 1\ba1/2\be hours.  The viscosity of the product is regulated by the proportion of solvents used.  A composition of low viscosity is used for coating sand or small stones, and a composition of high viscosity for coating rough stone, wire, paper, cardboard metal objects and for waterproofing textile materials.  Reference has been directed by the Comptroller to Specifications 363,698 and 373,769, [both in Group V].ALSO:A bituminous composition for coating sand and small stones is made by mixing pitch and coal tar with aliphatic chlorinated hydrocarbons and a commercial mixture of benzene homologues and heating the mixture under pressure.  Petroleum asphalt may be added to the pitch and tar or one of the latter may be omitted. The tar used consists of the residue obtained by distilling crude coal tar to remove light and middle oils and some anthracene oil. Chlorinated hydrocarbons specified are:-carbon tetra chloride, tri- or tetra-chlor ethylene.  The benzene homologues used are:-benzene first runnings, solvent benzene or heavy benzol. The mixture is heated in an autoclave at 130-220 DEG  C., under a pressure of 1,5 to 8 atmospheres for about 1 1/2 hours. And relatively high viscosity product is obtained by controlling the proportion of solvents used in the mixture.  Reference has been directed by the Comptroller to Specifications 363,698 and 373,769.
Patent GB-1366465-A (GB)
Title: Open ended structures formed of interlocking panels
IPC: H02B1/46
Filed: 1972-04-06
Abstract: 1366465 Boxes VERO ELECTRONICS Ltd 27 March 1973 [6 April 1972] 15936/72 Heading B8P [Also in Divisions H1 and F2] A box-section structure comprises interlocked rectangular panels of two different types 13, 13A each having an edge formation A but distinguished from each other by different edge formations B and C. Edge formations B are slidingly interlocked with edge formations A to form corner joints and edge formations C are slidingly interlocked with edge formations A to form continuity joints between aligned panels 13, 13A. The interlocked edge formations define holes 14 which accommodate fasteners for the joints and for securing end plates 11 to the boxsection structure. An end plate may extend beyond the box and carry a runner for mounting the structure on a panel or in a case. The panels (13, 13A, Fig. 5) may have heat dissipating fins on their external surfaces, and slots for locating flat plates may be formed on bolt surfaces.
Patent GB-993668-A (GB)
Title: Improvements in or relating to electric motor and pump units
Inventor: IVANOFF VICTOR
IPC: F04D7/06
Filed: 1962-04-26
Abstract: 993,668. Centrifugal pumps. HOWARD TYLER & CO. Ltd. April 17, 1963 [April 26, 1962], No. 15950/62. Heading F1C. [Also in Division H2] An electric motor and pump unit of the type in which the motor and pump are enclosed in a casing forming an upper, motor chamber and a lower, pump chamber, the chambers being joined by a relatively narrow neck portion through which extends, with clearance, a shaft carrying the motor rotor at its upper end and the pump rotor at its lower end and the liquid in the pump chamber having access to the motor chamber by way of an annular passage formed by the clearance gap between the shaft and the neck portion of the casing, is characterized in that there is provided, at one end of the annular passage, a liquid trap including a downwardly directed wall surrounding the mouth of the passage, the arrangement being such that in order to pass from the lower chamber to the upper chamber through the annular passage, liquid must pass downwardly below the lower edge of the wall. The pump unit shown comprises a pump chamber 2 connected to a motor chamber 1 by a neck 3. Hot liquid rising through the annular space 5 around the pump shaft 4 passes through a tubular baffle 12 into the space within a bell 11 carried by the shaft, and to escape from this space must pass downwardly below the lower edge of the bell and through the cooler liquid surrounding the bell and baffle. This prevents overheating of the motor by the hot liquid. Alternatively or additionally, a bell 13 and a baffle 14 are provided at the lower end of the annular space 5. In this case, hot liquid passing from the pump chamber 2 to the annular space 5 must pass below the lower edge of the baffle 14 and therefore through the cooler liquid trapped within the bell 13. Heat conduction through the bells, baffles and shaft is reduced by layers 11 A, 12A, 13A, 14A of insulating material such as impregnated asbestos, held in place by metal cladding 11B, 12B, 13B, 14B.
Patent GB-766683-A (GB)
Title: Improvements in or relating to grippers for stock for feed mechanism for power presses
Inventor: TALLIS CHARLES EDWARD
IPC: B21D43/11
Filed: 1954-05-29
Abstract: 766,683. Metal strip feeds. BIRMINGHAM TOOL & GAUGE CO., Ltd. May 31, 1955 [May 29, 1954], No. 15953/54. Class 83 (4). [Also in Group XVI] Mechanism for feeding strip to power presses comprises fixed and reciprocable grippers each having an inclined plane thereon on which is located a roller which forms one side of a gripping surface, spring-controlled plungers to urge the rollers up the inclined planes, and anvils adjustable in relation to the rollers between which the strip to be fed is alternately gripped during feeding. A slide 7 carrying an anvil 8 is slidable in a base 6, the slide being connected to a mechanism, e.g. a hydraulic ram 10, for reciprocating the slide. A bracket 11 having a split vertical bearing carries the anvil 8, while an anvil 9 is similarly mounted in a bracket 12 secured to the base 6, the anvils being vertically adjustable with respect to rollers 19, 20 and being held in adjusted position by screws 15, 16. Inclined planes 17, 18, carried by the slide 7 engage the rollers 19, 20 which also engage spring-pressed plungers 23, 24. The anvils 8, 9 are vertically adjusted to the required position for feeding stock of a certain thickness by passing the stock between the tops of the brackets 11, 12 and the undersides of heads 21, 22, the anvils 8, 9 being, lowered until the stock is gripped whereupon screws 15, 16 are tightened. When the slide 7 moves forward, the roller 19 is urged up the inclined plane 17, while the roller 20 moves down the inclined plane 18. On return movement the roller 20 is moved up the inclined plane 18, to retain the stock in position while the roller 19 descends the inclined plane 17. The grip on the stock may be released, e.g. for tension adjustment, by actuating a member 26 having pivots 27, Fig. 4, such that collars 30, 31, Figs. 2 and 4, mounted by vertical pivots, such as 33, on annular reduced portions, such as 29, of the brackets 11 and 12 are rocked towards the rollers 19, 20. The collars 30, 31 carry horizontally-disposed pins 36, 37, for this purpose. The member 26 may be actuated by a projection on the machine fed at each stroke. Specification 749,650, [Group XXIX], is referred to.
Patent GB-497014-A (GB)
Title: Improvements in brackets or supports for flasks, jugs and other like vessels
IPC: A47F5/00
Filed: 1937-06-09
Abstract: 497,014. Brackets. THERMOS (1925), Ltd., and SAWNEY, L. T. June 9, 1937, No. 15982. [Class 52 (v)] Relates to brackets or supports of the kind comprising a ring provided with cushioning means for supporting flasks, jugs, and other like vessels. According to the invention, the cushioning consists of a split ring 5 faced or covered with cloth, baize, or rubber and adapted to be sprung into position on the ring 1 of the bracket 2. As shown, the bracket ring 1 is formed with holes 4 for engagement by projections 6 and lugs 6a on the split ring when this is inserted into the bracket ring. The bracket may be fitted with an arm 7 provided with a resilient pad 8 to take the weight of the vessel.
Patent GB-550300-A (GB)
Title: Improvements in or relating to cleaning devices for vapour burner nozzles
IPC: F23D11/44
Filed: 1941-12-11
Abstract: 550,300. Vapour burners. AKTIEBOLAGET B. A. HJORTH & CO., and EKSTROM, H. Dec. 11, 1941, No. 16014. [A Specification was laid open to inspection under Sect. 91 of the Acts, April 21, 1941] [Class 75 (i)] To facilitate assembly of a cleaning device comprising a rack fitting in a bore in the nozzle housing and operated by a pinion on a spindle having a valve member controlling the gas inlet, the cleaning member 4 is provided with an inclined face on the side opposite the rack and at the end opposite the needle 3. The face may be provided with a ball projection 6 adapted to ride in a groove 9. In assembly the member is presented in an inclined position after removing the nipple.
Patent GB-1100202-A (GB)
Title: Spinning solutions of poly-ª‰-lactams
IPC: D01F6/60
Filed: 1965-04-14
Abstract: Polymers, of b -lactams mono-substituted in the 4-position are dissolved in organic or inorganic acids for spinning.  The lactams may be of formula <FORM:1100202/C3/1> where R may be C1- 18 alkyl, aryl, aralkyl, or cycloalkyl, and R1 and R11 may be H, C1- 18\t alkyl, aryl, aralkyl or cycloalkyl.  R, R1 and R11 may carry substituents and the alkyl radicals may be branched. Lactams specified are 4 - methyl - azetidinone, 3,4 - dimethyl - uzetidinone, 4 - ethyl - azetidinone, 4 - phenyl - azetidinone, 4 - (p - methylphenyl) - azetidinone, 4 - (p - chlorophenyl) - azetidinone, 4 - n - propyl - azetidinone, 3,3,4 - trimethyl - azetidinone, 3,3 - dimethyl - 4 - phenyl - azetidinone and 4-isopropylazetidinone.  The polymers may be copolymers of these or polymer mixtures. Acids specified are formic, sulphuric, phosphoric, nitric, acetic, thioglycolic, mono-, di- or tri-chloroacetic or mother liquors obtained in the preparation of these halogenated acetic acids, trifluoroacetic, lactic, pyruvic, hydroxyethane sulphonic acids and mixtures thereof.  Acids having a dissociation constant above 10-5 are preferred.  Salts of these acids and other solvents, e.g. methanol, methyl acetate, ethers and ketones, may be added to the polylactam/acid solution. The solution may be prepared at 0-40 DEG C. and its viscosity reduced by heating up to 100 DEG  C.