baber/WOPTO huggingface dataset:
Patent GB-921428-A (GB)
Title: Static switching systems
IPC: H03K17/72
Filed: 1960-11-11
Abstract: 921,428. Control of A.C. motors. WESTING- HOUSE ELECTRIC CORPORATION. Nov. 11, 1960 [Dec. 17, 1959], No. 38832/60. Class 38 (3). [Also in Group XL (c)] An A.C. load, e.g. a three-phase induction motor 2, is controlled by a hyperconductive, negative resistance, adjustable breakdown device 8 in each line, and across each device is connected a rectifier 10. In the forward direction the devices effectively block until a breakdown voltage across emitter 20 and collector 22 is reached, when they exhibit negative resistance and a large current flows while the potential drops. The breakdown voltage is reduced by applying a continuous or, suitably phased, pulsed control current to electrode 24 from a supply 12. In the reverse direction the device has a Zener characteristic, but since repeated operation with a reverse voltage in excess of the Zener breakdown value may cause failure the rectifier 10 is provided to carry the negative half-cycles of current. The forward breakdown voltage with zero control current is higher than the supply voltage, so the device may be used as a switch, actuated by applying or removing the control current, but also the value of the current may be adjusted to cause breakdown at different points on the A.C. cycle to give speed control of the motor.
Patent GB-940441-A (GB)
Title: Improvements in or relating to synchronous rotary electric machines
Inventor: RAWCLIFFE GORDON HINDLE
IPC: H02K19/32
Filed: 1958-12-02
Abstract: 940,441. Winding layouts for dynamo-electric machines. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Nov. 27, 1959 [Dec. 2, 1958], No. 38852/58. Divided out of 939,020. Addition to 900,600. Heading H2A. A synchronous motor employs a three-phase pole-amplitude modulation winding as described in the parent Specification and a phantom-pole field member giving the same alternative pole numbers. In the 10-pole/8-pole phantom-pole system shown, poles 5 and 10 are eliminated and poles 6, 7, 8, 9 reversed to give an approximation to an 8-pole field.
Patent GB-1085909-A (GB)
Title: Improved mineral mining machine
Inventor: ANDERSON FORREST SYMINGTON
IPC: E21C25/52
Filed: 1964-09-24
Abstract: 1,085,909. Mining machines. ANDERSON MAVOR Ltd. Dec. 23, 1965 [Sept. 24, 1964], No. 38893/64. Heading E1F. To facilitate loading of mineral from the floor at a face onto a conveyer during travel in either direction along the conveyer of a mining machine having a trepanner at one end only of the trepanner - supporting body of the machine there is provided at the other end of the body two paddle wheels separated by a floor scraper and rotatable in a direction to cause the mineral to be loaded up onto the conveyer. The paddle wheels, which are on a common shaft, together the floor scraper may be interchanged with the trepanner on the machine body, which also carries floor and roof-cutting discs.
Patent GB-1484142-A (GB)
Title: Monocrystalline display device with storage effect for an electronic timepiece
IPC: G02F1/055
Filed: 1974-09-09
Abstract: 1484142 Controlling light SOC SUISSE POUR L'INDUSTRIE HORLOGERE MANAGEMENT SERVICES SA 9 Sept 1974 [27 Sept 1973] 39192/74 Heading G2F The display of an electronic timepiece comprises a single domain ferro-electric crystal between a polariier and a specular or diffuse reflector on a common optical path and electrodes on the crystal are controllably energized from the voltage source of the timepiece via a voltage increasing means so as to switch the crystal between two stable electric polarization states which exhibit different birefingence or optical activity to light propagating along the optical path. The crystal may be such that reversal of electric polarization results in a reorientation of the refractive index ellipsoid other than a reversal thereof, e.g. as in gadolinium molybdate wherein reversal of polarization along the c-axis results in an effective interchange of the a and b axes. Alternatively a component of the polarization may be reversible, the reorientation of the total polarization, and the corresponding reorientation of the refractive index ellipsoid, therefore not being equal to 180 degrees (58 degrees for Bi 4  Ti 3  O 12 ). Crystals such as sodium nitrite and lead germanate 5PbO, 3GeO 2  which are optically active and show a reversal of the sense of optical rotation on electric polarization may also be used. A second birefringent or optically active crystal, which may be identical to the ferro-electric crystal in composition, cut, orientation and thickness, or may differ therefrom, and which is not provided with electrodes, may be disposed between the ferro-electric crystal and the polarizer. In one state of the ferro-electric crystal the two crystals may present zero total birefringence or optical rotatory power. A second crossed or parallel polarizer may be disposed between the ferro-electric crystal and the reflector. A colour filter (interference or absorption) may be associated with the first polarizer. The display may be arranged to be coloured in one or both states. The ferro-electric crystal may be of a thickness to act as a half or quarter wave plate in at least one of its states whereby a predetermined wavelength of light is completely transmitted or blocked. The field applied to the ferro-electric crystal may be longitudinal or transverse.
Patent GB-795858-A (GB)
Title: A method of controlling the viscosity of petroleum oil compositions
Filed: 1956-12-27
Abstract: The viscosity of petroleum oil compositions produced by adding lime to substantially neutralize a mixture of tall oil and petroleum oil is reduced by the addition of rosin thereto.  The tall oil preferably contains at least 30 per cent wt. fatty acids. The amount of petroleum oil may be between 30 and 70 per cent wt. of the final composition and the petroleum oil may have an aniline point between 15 DEG  and 225 DEG  F. to ensure it has sufficient aromatic constituents to render it compatible with neutralized tall oil.  A neutralization catalyst such as calcium acetate is preferably present during the neutralization and the amount of lime added may reduce the acid number below 8, preferably below 5 and gel the composition to a viscosity between 1600 and 2800 centipoises on the Brookfield viscometer at 350 DEG  F.  If the viscosity limits are exceeded the viscosity can be reduced by adding 0.1 to 2.5 wt. per cent of wood rosin, preferably less than 1 per cent, repeating the treatment if necessary.  If the viscosity is reduced too much it can be restored by adding more lime.  It is stated that commercial grades of rosin will normally be used as impurities have little or no effect on the process.  Solutions or suspensions of rosin may also be used.  In examples gelled compositions are made with a naphthenic mineral oil of aniline point 172 DEG  F. and the following viscosity (cps./350 DEG  F.) reductions are obtained: (a) with 0.5 per cent rosin, 6080 to 1960; 2160 to 880; 1800 to 760; (b) with 0.75 per cent rosin, 4520 to 1000; 4680 to 1200; (c) with 1 per cent rosin, 4800 to 680.
Patent GB-1422208-A (GB)
Title: Polyphenylene ether compositions apparatus for continuous hydrogenation
IPC: C08L71/12
Filed: 1973-08-21
Abstract: 1422208 Polyphenylene ether-rubber modified polystyrene compositions GENERAL ELECTRIC CO 21 Aug 1973 [23 Aug 1972] 39397/73 Headings C3G C3P and C3R Thermoplastic compositions -having high impact strength comprise (1) a polyphenylene ether resin and (2) a -rubber modified polystyrene resin comprising a polystyrene matrix in which is uniformly dispersed a discontinuous phase comprising particles of styrene homopolymer or a mixture of styrene polymers englobulated in diene rubber membranes, the particles having an average size of 0À1 to 0À7 micron, the membrane thickness being not greater than a quarter of the average particle diameter and the diene rubber content being 1 to 10% by weight of the rubber modified polystyrene. The-phenylene nuclei in the polyether may contain halogen, hydrocarbon, halohydrocarbon, hydrocarbonoxy or halohydrocarbonoxy substituents, and the polyether may have a degree of polymerization of at least 50. The modified polystyrene may be prepared by bulk prepolymerizing a solution of a natural or synthetic diene rubber, particularly polybutadiene or a butadiene/styrene copolymer, in styrene or an alkyl- or halostyrene to phase inversion and continuing the polymerization in aqueous suspension. In examples a -solution of polybutadiene or styrene/butadine copolymer rubber in styrene is bulk prepolymerized in the presence of 3,5-dit-butyl :phenol, benzoyl peroxide and dicumyl peroxide, and the polymerization completed (in aqueous suspension in the presence of gelatine, mineral oil and sodium lauryl sulphate. The products are blended with poly(2,6-dimethyl-, 2,6- diethyl, 2-methyl-6-ethyl-, 2-methyl-6-propyl-, 2,6-dipropyl- and 2-ethyl-6-propyl-1,4-phenylene)ethers.
Patent GB-888852-A (GB)
Title: Method and apparatus for determining the surface configuration of the solid coverings of mass-structures such as roads, runways, or the like
IPC: G01C7/04
Filed: 1959-11-20
Abstract: 888,852. Determining outline of surfaces. DAUM, J. Nov. 20, 1959 [Nov. 20, 1958], No. 39530/59. Class 106 (2). An apparatus for determining the surface configuration of the coverings of roads, runways, or the like comprises a bridge 1 movable along the surface 13 to be measured and extending across it, and a measuring unit 10 adjustable relative to a reference line established with the aid of the bridge and adapted to measure the distance of the surface of the road from the unit. The bridge 1 is carried on rails 5 at either side of the road 14 and is adjustable in height by rack-andpinion devices 16. A plumb-bob 9 indicates when the bridge is horizontal. Two tubular bars 8 are carried by the bridge and on these slide one or more gauging devices 10 which are of any suitable type and measure the distance beneath them of the road surface without contacting it. They may be adjusted vertically by rack - and - pinion mechanisms 17. In use, measurements are taken at suitable distances across the road on a number of cross-sections, both before and after the covering 13 is laid, preferably making use of two separate bridges. The results obtained are recorded or plotted on a graph and the volume, thickness and crosssectional area of the covering 13 can then be deduced.
Patent GB-1002788-A (GB)
Title: Method of and means for reducing the oscillatory motions of ships
IPC: B63B39/02
Filed: 1963-10-08
Abstract: 1,002,788. Stabilizing ships. H. LAGKENBY and M. N. PARKER. Aug. 5, 1964 [Oct. 8, 1963], No. 39632/63. Heading B7M. Passive weight, or passive tank, stabilizers are improved by damping the motion of the weight or liquid and automatically controlling the damping according to the oscillatory motion of the ship. In Figs. 1 and 3 a truck 11 mounted on wheels 27 for movement along a track 12 has magnetic brakes 19 and carries shoes 20, 21 for contacting conductor rails 15, 16 supplied with electricity under the control of a gyroscope 14. In Figs. 5 and 6 a tank 30 is fitted near each end with rotary valves 31, 32 operated by hydraulic actuators 33, 34 under the control of a gyroscope 35.
Patent GB-834727-A (GB)
Title: Improvements relating to hydraulic systems for motor vehicles, more particularly agricultural tractors
IPC: A01B63/10
Filed: 1957-12-20
Abstract: 834,727. Hydraulic brakes. ALLGAIERWERKE G.m.b.H. Dec. 20, 1957 [May 14, 1957], No. 39697/57. Addition to 816,087. Class 103 (1). [Also in Group XXIX] The tractor hydraulic system of the parent Specification is adapted for the operation of brakes. As in the parent Specification, a pump 1 supplies liquid selectively to a servo cylinder 7 and an hydraulic motor 8 under the control of a valve 6, and a valve 11 maintains a back pressure in a return line 10. As shown, in Fig. 1, a valve 24 is inserted into the pump discharge line 5 upstream of the valve 6 so that liquid is either supplied to valve 6 or to brake cylinders 26, 27, 30, 31. In a modification the brake cylinders are not connected directly to the system, but are connected to a master cylinder having a piston mechanically connected to a piston of a servo cylinder communicating with the valve 24. In the modification of Fig. 5, valve 24 is a piston-type valve having a collar 55 co-operating with a spring-loaded piston 56 forming a relief valve. When valve 24 is in its right-hand position, so that liquid is supplied to the valve 6 through a line 5<SP>1</SP>, the brake cylinders are open to exhaust through the unloaded relief valve; movement of valve 24 to the left compresses the valve spring 58 and raises the pressure in the brake cylinders.
Patent GB-975222-A (GB)
Title: Improvements in or relating to motor car bodies provided with decorative trim strips
IPC: F16B5/12
Filed: 1963-10-08
Abstract: 975,222. Vehicle bodies. CHICAGO UNITED PRODUCTS CO. Inc. Oct. 8, 1963 [Oct. 25, 1962], No. 39699/63. Drawings to Specification. Heading B7B. The edges of a trim strip are coated or fitted with synthetic resin material preferably unplasticized to form a joint between the trim strip and the body.
Patent GB-895528-A (GB)
Title: Improvements in and relating to wrapping machines
IPC: F16H35/02
Filed: 1959-11-24
Abstract: 895,528. Toothed gearing. HANSELLAWERKE A. HENKEL A.G. Nov. 24, 1959 [Oct. 12, 1959], No. 39817/59. Class 80 (1). In a drive of cyclically varying ratio between a gear 4 fixed on a driving-shaft 2 and a coaxial gear 5 loose thereon, the gears 4, 5 are interconnected by a gear pair 71-72 mounted on a shaft 6 carried by webs 8 pivoted on the shaft 2, the shaft 6 being oscillated about the shaft 2 by a fork 9 on a crank 11 driven by a gear 3 on the shaft 2. The gear 5 drives the heated roller for welding plastic tubes or strips in a wrapping- machine, the varying drive serving to impart periodic retardations during welding. The transmission ratio and the oscillating movement may be varied by adjusting the distance between shafts 2 and 12 and/or by using forks, webs and gear-wheels of different sizes.
Patent GB-1357352-A (GB)
Title: Amplifier-limiter circuit with reduced am to pm conversion
IPC: H03F1/44
Filed: 1971-08-25
Abstract: 1357352 Transistor amplifying and limiting circuits RCA CORPORATION 25 Aug 1971 [26 Aug 1970] 39831/71 Heading H3T An amplifier-limiter circuit for providing substantially linear amplification of an applied angle modulated signal wave at relatively low signal levels and providing limiting at relatively high signal levels of the applied signal wave, and tending to introduce a delay varying inversely with signal level, is provided with compensatory positive feedback for providing a substantially fixed phase shift through the amplifier circuit from relatively low to relatively high input signal wave levels. One embodiment comprises an integrated circuit in which transistor 506, Fig. 1, of long-tailed pair 504, 506 is coupled by emitter follower 508 to transistor 516 in second long-tailed pair 516, 518, in which transistor 518 feeds output terminals 554 via a second emitterfollower 520. Compensation for phase-shift in the transistors 516, 518 is provided by positive feedback capacitor 550 connected between the emitter of transistor 520 and base of transistor 508. Alternatively a high value resistor may be used, being connected between the collector of transistor 518 and base of transistor 508. The long-tailed pair 504, 506 may also be compensated by means of a positive feedback capacitor 552 returned to a preceding stage. A second embodiment comprises an integrated-circuit I.F. amplifier including a long-tailed pair of transistors 280, 282, Fig. 3, driven in push-pull from the secondary 202 of an I.F. transformer and having as common emitter impedance the collector-emitter impedance of transistor 210. The transistors 280, 282 are each arranged in cascade connection with further transistors 292, 294 respectively, the collectors of which drive via emitter-followers 205, 207 respectively a second long-tailed pair comprising transistors 305, 307. Transistors 305, 307 have as common emitter impedance the collector-emitter path of transistor 212, and they drive via emitterfollowers 209, 211 respectively a third longtailed pair of transistors 326, 328. Transistors 326, 328 have as common emitter impedance the collector-emitter path of transistor 214, and additional limiting is performed by means of a pair of reversely-poled diodes 226, 228 interconnecting their collectors. Transistors 326, 328 are coupled by means of Darlington connected pairs 349, 346 and 336, 338 respectively to output terminals 234, 236 respectively. The arrangement is stabilized for D.C. by a feedback path from the join of emitter circuit resistors 356, 358 to the base of transistor 282 via resistor 360. Positive feedback for reducing phase-shift on the transistors 305, 307 is provided by capacitors 310, 316.
Patent GB-1078932-A (GB)
Title: Improvements in vapour generators
IPC: F22B29/06
Filed: 1964-10-01
Abstract: 1,078,932. Once-through vapour generator. BABCOCK & WILCOX CO. Oct. 1, 1964 [Oct. 1, 1963], No. 39983/64. Heading F4A. In a forced flow once-through vapour generator that includes an upright furnace chamber (10), Fig. 1, of substantially rectangular cross-section divided into two compartments by a vertical tube wall (28), combustion gases from burners (43) pass out of the top of the furnace chamber through a gas outlet (16), adjacent to which is arranged a secondary superheater (30), and flow through a horizontal gas pass (17) which contains a secondary reheater (31). The gases then flow down an upright gas passage (19) which is divided into parallel gas passes (32 and (33) by a vertical baffle wall (34) and which contains a primary superheater (36), a primary reheater (37), and a secondary economizer (38) over which the gases pass before passing through dampers (33A) and (34) and over a primary economizer (41) on their way to an air heater and stack (not shown). The front, rear and side walls of the furnace chamber (10), are formed by groups of tubes connected for parallel flow of the cooling, fluid, the individual groups of tubes being connected in sets of series-connected parallel paths, as shown in Fig. 8, so that groups of tubes on the same horizontal level combine to form fluid heating passes A, B and C. The tube groups A1, B1 and C1 from the front part of the floor (15) and the front wall' (11) of the furnace chamber the tube groups A2, B2 and C2 form the rear part of the floor (15) and the rear wall (12), and the tube groups A3, B3 and C3 form the side walls. The outlets of each group of tubes is in the form of an upright cylindrical fluid mixing vessel 90 from which the fluid passes to the inlet of the next group of tubes. The uppermost group of tubes in the rear wall (12) are bent inwardly and upwardly to form a nose arch (80) and then rearwardly to form the floor of the gas pass (17) and tube screens (71) and (79) and consequently the lengths and bend resistances of the tubes are increased compared with the corresponding tubes in the side and front walls. In order to balance out this difference and to supply a greater quantity of fluid to the higher heat pickup zone the fluid flow from the group of tubes B3 in the side walls is transferred to the uppermost group of tubes C2 of the rear wall and correspondingly the fluid flow from the group of tubes B2 in the rear wall is transferred to the group of tubes C3 in the side walls.
Patent GB-967675-A (GB)
Title: Method of cooling water and apparatus therefore
Inventor: LACQUEUILLE CLEMENT ROBERT JOS
IPC: F28C3/08
Filed: 1961-11-08
Abstract: 967,675. Refrigerating. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. Sept. 25, 1962 [Nov. 8, 1961], No. 40006/61. Heading F4H. [Also in Division B1] Warm cooling water, withdrawn from a refinery or a chemical plant via line 1 into vessel R, is cooled down by partial evaporation of the water as it flows through a series of stages of successively lower pressure, e.g. ten stages V 1  . . . V 10  as in the Figure, the cooled water being withdrawn from the last stage (V 10 ) and pumped back to the refinery. The vapour separated in each stage passes through a line L to a compressor C (preferably of the rotary type) where it is compressed to at least the pressure of the preceding stage, the compressed vapour is combined with the vapour formed in the preceding stage, and the total combined vapour discharged from the compressor C 1 , associated with the first stage V 1 , is passed to a condenser Cd. The condensate may be returned to vessel R via line 2, thereby forming a closed system, or the condensate may be used as drinking water. Non-condensable gases, such as air, are removed from the system by vacuum pump Vc. In order to eliminate superheating of the vapour, caused by compression, water may be drawn from each stage via line L<SP>11</SP>, and injected into the preceding compressor and/or into the vapourline. Alternatively, the condensate from the condenser Cd may be used as injection-water.
Patent GB-1242968-A (GB)
Title: Liquid cooling apparatus
Inventor: PAXMAN ERIC RONALD
IPC: F28F1/32
Filed: 1969-08-11
Abstract: 1,242,968. Cooling liquids. PAXMAN COOLERS Ltd. 28 Jan., 1970 [11 Aug., 1969], No. 40117/69. Headings F4H and F4S. A liquid cooling apparatus comprises a tank 10 containing a cooling medium, e.g. water or oil, and a matrix 12 of tubes of serpentine form formed into two separate circuits 13, 18, the former having an inlet 14 and outlet 16 for a liquid beverage to be dispensed which is cooled by passage through the circuit and the latter circuit forming a passage for a refrigerant from a compression refrigeration system 19. The tubes have plate fins 21 which are assembled together by inserting the tubes through holes in the fins and then expanding the tubes radially outwards into engagement with the surfaces of the holes. The tubes of the circuit 18 are disposed in the upper region of the circuit 13 and between its tubes. A sensor may be positioned in the cooling medium to thermostatically control its temperature by operation of the refrigeration unit and turbulator or pump may be mounted in the tank to agitate the medium.
Patent GB-1440994-A (GB)
Title: Acid pickling solution for treating metals
IPC: C23G1/02
Filed: 1973-08-24
Abstract: 1440994 Pickling solution for metals SHIPLEY CO Inc 24 Aug 1973 [29 Nov 1972] 40171/73 Heading C7E [Also in Division B6] An aqueous pickling or etching solution for metals is substantially free of HNO 3  and contains at least 0À5M/1 of HF, HBr or HCI, together with at least 0À5M of urea per M of acid up to a maximum urea concentration on or below the line of Fig. 1, 2 or 3. The urea/acid molar ratio may be at least 1:1 and other additives e.g. citric acid or a surfactant may be present. Metals treated are Fe, steel, Al, Cu, Ni and alloys, Ti, Zr and a Ni/Co/Fe/Mn alloy. Pickling may last 1-10 mins, at 70-210F and be followed by electroless Ni plating from a hypophosphite bath. The urea reduces fuming of the solution during use.