baber/WOPTO huggingface dataset:
Patent GB-731082-A (GB)
Title: Pressure control in liquid supply systems
Inventor: DAVIS ALBERT HENRY
IPC: F16K17/10
Filed: 1952-09-19
Abstract: 731,082. Fluid-pressure servo motor-control systems. ZWICKY, Ltd. Sept. 18, 1953 [Sept. 19, 1952], No. 23629/52. Class 135. A servo-operated pressure controller in a liquid supply system, e.g. a system for refuelling vehicles &c. on aerodromes, which system may have one or more remote delivery points each associated with a cut-off valve and a relay valve located upstream of the cut-off valve comprises a pipe section 1, Fig. 1, in the supply main having a control valve 2 opening into the pipe section against a spring 3 and the pressure in the section to allow escape of liquid through a port 5 to the inlet side of the supply pump of the system, a spring-loaded servo-piston 8 operably connected by a loose rod 12 with the control valve, an adjustable leak-off valve 13 and, on the upstream side of the valve 2, a relay valve 32 having a spring 29 set at a pressure above that at which the springs of the delivery relay valves are set to safeguard the system against excess pressure. The relay valve 32 is fitted with a cover 35 to prevent the user tampering with the setting of its spring 29 and with a handle 34 and rod 33 enabling the valve, and hence the valve 2 to be manually opened if desired. For convenience, a delivery relay valve 18, Fig. 2, is fitted in the same casing as the control valve 2 and connected with the main on the upstream side of that valve and with the space above the piston 8 by a pipe 27. The valve 18 is of somewhat similar construction to that of the valve 32. The cover 35, handle 34 and rod 33 are, however, omitted and the setting of its spring is adjustable by the user. The valve 18 is fitted with an index pointer and a scale indicating the pressure at which its spring is set.
Patent GB-1248053-A (GB)
Title: Improvements in or relating to control circuits for switching d.c. electrical generators to d.c. electrical motors
Inventor: SLOAN ALBERT EVERETT
IPC: H02P9/00
Filed: 1968-05-17
Abstract: 1,248,053. Transistor oscillators. SEVCOM ENG. Ltd. 30 April, 1969 [17 May, 1968], No. 23637/68. Heading H3T. [Also in Division H2]  A relaxation oscillator 70 operates when the potential at the junction of resistors 71, 73 is below a value determined by a Zener diode 77, to supply triggering pulses to a thyristor 39. In these circumstances transistors 81, 83 conduct and discharge capacitor 89 through transformer primary 85, whereupon they cut off until 89 is recharged through resistors 75, 87. Capacitor 79 is for smoothing purposes. The arrangement is used to connect a D.C. motor to a generator after the generator voltage has been reduced (see Division H2).
Patent GB-1292313-A (GB)
Title: Passenger conveyors
Inventor: BROOKE THOMAS ANDREW
IPC: B66B29/08
Filed: 1968-08-22
Abstract: 1292313 Endless passenger-conveyers DUNLOP HOLDINGS Ltd 19 Aug 1969 [22 Aug 1968 9 May 1969] 45479/69 and 23639/69 Heading B8A A passenger conveyer comprises a support member 2 providing a support surface which can be continuously circulated for carrying passengers, two end stations 6, 7, and an intermediate station 9 located between the end stations and proving a stationary support surface for passengers, the support member 2 being arranged to follow a path comprising a portion extending from one end station beneath the intermediate station to the other end station. The member 2 is in the form of a belt having a grooved tread pattern formed in the surface thereof which supports the passengers between the stations, comb assemblies 10 being provided at the leading and trailing edges of the intermediate station with respect to the direction of travel of the belt, the teeth of which are locatable in the grooves of the belt's grooved tread pattern. As shown, there are two intermediate stations 9, 13. In a modification (Fig. 2, not shown), a second passenger conveyer belt at right angles to, but in the same plane as, the belt 2, also passes below one of the stations 9, 13. The latter can thus be used as a junction platform between the two conveyers. Instead of belts, the conveyers may consist of a series of movable platforms as described in Specification 1,034,969.
Patent GB-155911-A (GB)
Title: Improvements relating to inking mechanism of platen printing machines
IPC: B41F1/40
Filed: 1919-09-25
Abstract: 155,911. Parks, W. M., and Watkins, A. E. Sept. 25, 1919. Inking-apparatus. - An inking-mechanism for platen printing-machines of the kind comprising inking rollers some of which are kept out of contact with the forme during the downward and some during the upward movements of the carriage in which they are mounted, is provided with three or more inking rollers, one of the two lower rollers being adapted to ink the forme while the carriage is descending the second roller being kept out of contact, and on the reverse movement the first roller is kept out of contact while the second roller effects the inking, the remaining rollers being always in contact with the forme. Four inking rollers a, b, c, d, Fig. 1, are mounted in bearings e, guided on a carriage f and provided with springs g in known manner. Slides h having cams i are mounted on the carriage so as to be free to move vertically to engage the two lower bearings within limits determined by slots k in the slides and pins l fixed to the carriage, and are connected by pins and slots o to pivoted levers m, engaging stops p and q, Fig. 4, at each end of the travel of the carriage, whereby on the descent of the carriage the roller b is kept out of contact with the forme r, the roller a effecting the inking, and on the ascent the roller a is kept out of contact and the roller b effects the inking, the remaining rollers c, d being in contact with the forme in both directions of travel. The levers m have springs or counterbalances to counteract the weight of the slides h. A riser s, Fig. 4, having an incline u may be attached to the bottom of the frame t to raise the bearing of the roller a away from or clear of the cam i so that the cam moves easily to its next position and wear is reduced. The roller b may also be slightly raised clear of the cam i by the riser s.
Patent GB-1466007-A (GB)
Title: Data storage apparatus employing variable threshold field  effect semiconductor devices
IPC: G11C16/04
Filed: 1974-05-29
Abstract: 1466007 Semi-conductor devices INTERNATIONAL BUSINESS MACHINES CORP 29 May 1974 [29 June 1973] 23762/74 Heading H1K [Also in Division G4] A memory cell of the type constituted by a variable-threshold IGFET whose gate insulation 16 (Fig. 6) is capable of storing charges injected therein from the channel region includes at least one capacitive control gate 24 isolated from the storage gate 22 and located between the storage gate 22 and one of the source and drain regions 12, 14. Application of an appropriate potential to the control gate 24 inhibits the formation of a channel therebeneath and so isolates the storage area 40 of the device from the source or drain region. A single control gate may be provided or, as shown, interconnected control gates 24, 24<SP>1</SP> may be provided on both sides of the storage gate 22. Channel inhibition beneath the control gates 24, 24<SP>1</SP> enables an optical write mechanism to be employed, whereby carriers are generated in the storage area 40 by the absorption of light, an appropriate potential on storage gate 22 causing carriers to tunnel into the gate insulation 16, which preferably comprises silicon nitride or silicon oxide. A more conventional electrical writing mechanism employing carriers injected from the source or drain regions 12, 14 requires the application of a channel-inducing potential on the control gates 24, 24<SP>1</SP>, and this is also the case for both read and erase processes. An orthogonal array of such storage cells is described (Fig. 9), in which source/drain regions common to all cells in a column are provided by diffused strips 46, the control gates are provided by polycrystalline silicon strips 24, 24<SP>1</SP> parallel to the source/drain strips 46, and the storage gates are provided by aluminium strips 22 perpendicular to the strips 24, 24<SP>1</SP> and isolated therefrom by insulation 48.
Patent GB-681712-A (GB)
Title: Improvements in or relating to therapeutically useful pyrimidine compounds
IPC: C07D239/42
Filed: 1949-09-14
Abstract: The invention comprises aminopyrimidines of the general formula <FORM:0681712/IV (b)/1> wherein R1 represents a benzyl radical or an aryl radical (e.g. naphthyl, phenyl, chlorophenyl, bromophenyl or nitrophenyl), R2 represents hydrogen, a benzyl radical or a straight or branched chain alkyl radical of not more than 7 carbon atoms, and R3 represents hydrogen, a straight or branched chain alkyl radical of not more than 7 carbon atoms, or a benzyl, phenyl, tolyl, chlorophenyl, bromophenyl, methoxyphenyl or ethoxyphenyl radical. These compounds, which are therapeutically useful, especially in veterinary medicine, may be prepared by the following methods: (a) condensing a keto ester R1CO.CHR2.COOAlkyl with guanidine carbonate (by refluxing in alcohol) to form the corresponding 4-hydroxy derivative, refluxing this with excess phosphoryl chloride and reacting the resulting 4-chloro compound with ammonia or an amine R3NH2 (preferably in excess and advantageously in aqueous, alcoholic or aqueous-alcoholic solution); (b) preparing the 4-hydroxy compound as in (a), replacing the hydroxy group by a sulphydryl group by a method analogous to that of Specification 598,514, and replacing the sulphydryl group by -NHR3 by drastic treatment with ammonia or an amine by methods analogous to those of Specifications 671,926 and 671,927; (c) condensing the keto ester with thiourea to produce a 2-sulphydryl-4-hydroxypyrimidine, replacing the hydroxy group by a second sulphydryl group, reacting the product with ammonia or a primary amine to replace the sulphydryl group in the 4-position by NHR3, and then replacing the sulphydryl group in the 2-position by a carboxymethylthio group by reaction with chloracetic acid and the latter group by an amino group by reaction with ammonia, both by methods analogous to those described in Specification 663,567. Examples describe the preparation by method (a) of 2 : 4-diamino-6-phenylpyrimidine and its 5-methyl- 5-n-propyl and 5-benzyl derivatives, 2 : 4-diamino-6-p-chlorophenylpyrimidine and its 5-methyl derivative, 2 : 4 - diamino - 6 - p - nitrophenylpyrimidine, 2 : 4 - diamino- and 2 - amino - 4 - methylamino - 6 - b  - naphthylpyrimidine, and 2 - amino-4-methylamino-, -anilino- and -p-chloro-and -p-methoxy-anilino-6-phenylpyrimidine.
Patent GB-751739-A (GB)
Title: Improvements in or relating to tuning arrangements for radio receivers
IPC: H03H5/00
Filed: 1953-08-28
Abstract: 751,739. Inductors. COLE, Ltd., E. K., MARTIN, A. W., and BURNARD, C. L. Aug. 30, 1954 [Aug. 28, 1953], No. 23781/53. Class 38 (2). [Also in Group XL (c)] The rotary tuning capacitor for a radio receiver is mechanically coupled to a variable inductor such that in the region of maximum capacitance, rotation of the capacitor shaft causes the inductance to vary in the same sense. A two-gang rotary tuning capacitor for the aerial and oscillator circuits of a radio receiver has a frame upon which is mounted a bracket E carrying two of the inductors for the circuits. The bracket also carries a carriage J upon which are adjustably mounted the tuning cores I 2  of the inductors. The carriage is moved by means of a lever 0 which engages a pin P on the carriage and lies in the path of a roller T on a drum U secured to the shaft S of the capacitor. The roller contacts the lever only in the region of maximum capacitance so that the lower frequency end of the tuning range is compressed and a wider range is covered. The carriage moves the cores inwardly against the force of a spring R which also urges the cores laterally to reduce backlash. Auxiliary adjustable cores L 1  are provided to enable the minimum inductance to be varied and thus to facilitate tracking adjustment.
Patent GB-760869-A (GB)
Title: Method of flocculating fine mineral particles
IPC: C02F1/54
Filed: 1954-08-16
Abstract: To concentrate finely divided mineral solids in, and subsequently separate them from, an aqueous suspension, there is added a water-soluble, high-molecular-weight poly ethyleneimine or aminated poly (vinyl - aryl hydrocarbon) compound.  The latter compounds are characterized by the presence of a plurality of groups of the formula:- <FORM:0760869/III/1> where each R represents a lower alkyl or alkylol radical and X a salt-forming anion such as chlorine or bromine.  The polymer is preferably prepared as a dilute aqueous solution for mixing with the suspension.  Acetone may need to be added as a cosolvent in preparing a concentrate (for dilution before use) of certain of the aminated poly (vinyl - aryl hydrocarbon) compounds.  The solution may be introduced with a pipe conveying the suspension or may be added while the suspension is held in a pond or tank.  The agent may alternatively be added in solid form.ALSO:To concentrate finely-divided mineral solids in, and subsequently separate them from, an aqueous suspension, there is added a water-soluble, high-molecular-weight polyethylene-imine or aminated poly (vinyl-aryl hydrocarbon) compound.  The latter compounds are characterized by the presence of a plurality of groups of the formula:-  <FORM:0760869/I/1> where each R represents a lower alkyl or alkylol radical and X a salt-forming anion such as chlorine or bromine.  The polymer is preferably prepared as a dilute aqueous solution for mixing with the suspension.  Acetone may need to be added as a co-solvent in preparing a concentrate (for dilution before use) of certain of the aminated poly (vinyl-aryl hydrocarbons).  The solution may be introduced into a pipe conveying the suspension or may be added while the suspension is held in a pond or tank.  The agent may alternatively be added in solid form.ALSO:To concentrate finely-divided mineral solids in, and subsequently separate them from, an aqueous suspension, there is added a water soluble, high-molecular weight polyethyleneimine or animated poly (vinytaryl hydrocarbon) compound.  The latter compounds are characterized by the presence of a plurality of groups of the formula:- <FORM:0760869/II/1> where each R represents a lower alkyl or alkylol radical and X a salt forming anion such as chlorine or bromine.  The polymer is preferably prepared as a dilute aqueous solution for mixing with the suspension.  Acetone may need to be added as a cosolvent in preparing a concentrate (for dilution before use) of certain of the animated poly (vinyl-aryl hydrocarbon) compounds.  The solution may be introduced into a pipe conveying the suspension or may be added while the suspension is held in a pond or tank.  The agent may alternatively be added in solid form.
Patent GB-1186191-A (GB)
Title: Improvements in or relating to Internal Cylindrical Grinding Machines.
IPC: B24B5/06
Filed: 1967-05-23
Abstract: 1,186,191. Grinding. ULVSUNDA VERKSTADER A.B. 23 May, 1967 [3 June, 1966], No. 23823/67. Heading B3D. An internal grinding machine comprises a chuck 14 for holding a workpiece 16, a grinding wheel 30 in a holder 25 supported by a spindle 36, the axis of which is inclined to the axis of the chuck, both the chuck and spindle being rotatable and displaceable relatively to one another in an axial direction with a component acting in a radial direction for successive diminishment of the internal surface of the workpiece and to compensate for wear of the grinding wheel. The chuck is mounted in a tailstock 12 movable for effecting transverse feed in the direction of the arrow 18. The holder is carried by the upper portion 24 of a slide movable in the direction of arrow 28 on a lower portion 23 mounted on a table 20 reciprocable in the direction of arrow 22. The axis of the grinding wheel is thus inclined to the axis of the workpiece and stepwise advancement of the grinding wheel compensates for wear of the wheel and the reduction in which diameter caused by truing by a tool 34. The stepwise advancement may be effected by movement of the slide 24 or, in an alternative embodiment, by movement of a rod 26 formed by grinding material and gripped by members 70, 78 in the holder. The members are associated with pistons 44, 68 movable selectively by fluid pressure, such as air, supplied to chambers 54, 68 which cause selective release and gripping of the members on the rod and stepwise axial movement thereof.
Patent GB-1171248-A (GB)
Title: A Rolling Loop Film Transport Mechanism
Inventor: JONES PETER RONALD WRIGHT
IPC: G03B1/18
Filed: 1967-05-23
Abstract: 1,171,248. Cine film feed apparatus. P.R.W. JONES. April 17, 1968 [May 23, 1967], No.23909/67. Heading G2E. Film F is fed continuously between a curved stator unit S and a rotor unit R by sprockets A and B, and intermittent motions at exposure aperture C is provided by registering pins P which engage the film to form a loop at that one of a series of gaps 1, 2, 3, 4 in the rotor which is next approaching gate C, the gap carrying the loop on to disengage the film held by pins Pwhereby the film advances by one frame and is re-engaged by the pins. In a modification, a linear stator is used, and the rotor is replaced by a driven belt or chain having a series of gaps.
Patent GB-274308-A (GB)
Title: Improvements in or relating to earthing devices for electrical apparatus
IPC: H01Q1/48
Filed: 1926-09-28
Abstract: 274,308. Day, W. H. Sept. 28, 1926. Earth plates and earth connections.-A device for earthing electric apparatus, particularly wireless sets, comprises a closed metal box, tank, or receptacle A, filled, or nearly filled, with water or moisture-retaining material, and a tube D passing through the lid B of the receptacle into the water or moisture-retaining material. The lid B may fit loosely, so that water can overflow from the tank, or it may be clamped tightly on the box. The tube D is open at the top, and the part which is sunk in the ground may be perforated to allow water to soak into the surrounding soil when poured into the open top.
Patent GB-934360-A (GB)
Title: A cassette for strip material wound on spools
IPC: G03B21/32
Filed: 1960-07-08
Abstract: 934,360. Cassettes. AGFA A.G. July 8, 1960 [July 15, 1959], No. 23974/60. Class 18. A cassette for strip-like material wound on a spool 5, comprises a container 1 open at one narrow side and has a spool chamber 2 formed with a curved base which merges into a flat wall, the pivot 3 of the chamber being so placed that the flat wall forms a cover closure for the cassette. The cassette, made from a synthetic plastic material, is provided with recesses 4 which enable the chamber to be gripped for swinging outwardly.
Patent GB-830603-A (GB)
Title: Improvements relating to electric rectifier circuits
Inventor: JARVIS EDWARD ALFRED
IPC: H02M7/10
Filed: 1955-08-21
Abstract: 830,603. Control of D.C. motors. ENGLISH ELECTRIC CO. Ltd. Aug. 17, 1956 [Aug. 22, 1955], No. 24100/55. Class 38 (3). [Also in Group XXXV] A D.C. load such as a traction motor 21, is energized from the series-connected outputs of rectifier bridges 13, 14, 15, 16, the A.C. terminals of which are connected to separate supply terminals such as those of the secondary windings 10b, 10c, 10d, 10e of transformer 10, which may have different numbers of turns. The output voltage may be varied in steps by suitable sequential operation of contactors 17, 18, 19, 20. The bridges may comprise germanium rectifiers and be arranged for a three-phase supply.
Patent GB-1089107-A (GB)
Title: Needle operating mechanism for looms
IPC: D03D35/00
Filed: 1966-05-31
Abstract: 1,089,107. Shuttleless looms. CROMPTON & KNOWLES CORPORATION. May 31, 1966 [June 7, 1965], No. 24120/66. Heading DIE. A smallware loom, weaving two fabrics side-by-side, has weft inserting needles 24, 26 which are pivoted on crank pins 42, 46 on shafts 33, 34 rotating in opposite directions, each pivot being connected by a link 50 or 52 to the member 26 or 24 of the other needle, so that each crank imparts some of its motion to the other needle and the needle eyes 28 move in paths 62.
Patent GB-934535-A (GB)
Title: Improvements in or relating to jet looms
IPC: D03D47/00
Filed: 1960-07-12
Abstract: 934,535. Jet looms. SDRUZENI PODNIKU TEXTILNIHO STROJIRENSTVI. July 12, 1960 [July 13, 1959], No. 24210/60. Class 142 (2). In a loom in which the weft 11 is projected through the shed by a jet of liquid, a valve 5, which is lifted off its seat when pressure is applied at the inlet 9, is loaded by a rubber sleeve 7 instead of by a steel spring.
Patent GB-713347-A (GB)
Title: Improvements in or relating to apparatus for converting variable quantities into electric pulse code signals
IPC: H03M1/00
Filed: 1951-10-18
Abstract: 713,347. Electric selective signalling. GENERAL ELECTRIC CO., Ltd., and BAYLISS, A. J. Oct. 20, 1952 [Oct. 18, 1951], No. 24356/51. Class 40(1). Apparatus for converting a variable quantity into an electrical pulse code signal comprises a device adapted periodically to count the number of cycles in the output of an oscillator in a time interval and means for pulse coding the numerical count, the oscillator frequency or the duration of the time interval being varied in accordance with the quantity. to be coded so that the numerical count is a measure of the magnitude of the quantity. As shown, a unidirectional voltage representative of a quantity to be telemetered is applied to a potentiometer 2 to control the frequency of an oscillator 3, the output of which is squared at 4, differentiated at 5, and passed through an electronic gate 6 to a binary counter 8 which counts e.g., only the positive output pulses from 5. The gate 6 is opened periodically for a predetermined time by pulses from a pulse timing generator 7. With zero voltage input to the potentiometer 2 the oscillator frequency is such that the counter, which is zeroised between counts is stepped through its maximum value to zero during each gating pulse. Variation of the oscillator frequency will then produce a count corresponding to the potential applied to the potentiometer and hence to the magnitude of the variable. The digits registered in the binary counter are. transmitted sequentially in known manner by a multiplexing device 9 over terminal 10. A plurality of quantities may be transmitted in time multiplex, the voltages representing the several quantities being applied to vary the oscillator frequency in turn. Alternatively, the oscillator frequency may be fixed and the length of the gating pulses varied according to the magnitude of the variable.
Patent GB-709654-A (GB)
Title: Improvements in combustion chambers for gas turbine plant
Inventor: GARDNER THOMAS LOWTHIAN
IPC: F23R3/08
Filed: 1951-10-19
Abstract: 709,654. Generating combustion products under pressure. METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. Sept. 24, 1952 [Oct. 19, 1951], No. 24464/51. Class 51 (1) A combustion chamber or flame tube for gas turbine plant is formed of cylindrical sections which telescope one within another so that the diameter of the flame tube increases in steps in the direction of flow of the combustion gases therethrough, annular gaps being formed between each pair of sections for the inflow of cooling air. The adjacent sections are located with respect to one another by means of outwardlyprojecting lugs 4 mounted at the downstream end of an upstream section, and are secured together by riveting between outwardly-projecting lugs 5, 7 carried by the adjacent sections. The locating lugs 4 have axial slots which receive the upstream end of the adjacent section. The lugs 7 have axially and radially extending slots 6 which receive the lugs 5 and the two lugs are secured by a rivet. The upstream ends of the sections are chamfered to minimize disturbance of airflow.