baber/WOPTO huggingface dataset:
Patent GB-619062-A (GB)
Title: Improvements in or relating to electric control or amplifier systems
IPC: G05B11/01
Filed: 1946-06-27
Abstract: 619,062. Valve circuits. SPERRY GYROSCOPE CO., Inc. June 27, 1946, No. 19270. Convention date, July 24, 1942. [Class 40 (vi)] In an amplifier for a modulated carrier signal as used in a control system, which may if required contain a demodulator circuit, the output carrier envelope, or the demodulated output if a demodulator is included, is made a predetermined function of the modulation of the input carrier by deriving a suitable gain controlling voltage from the output voltage for controlling the demodulator gain, where one is employed, or where one is not employed by including a device in the feedback path such as a thermistor network or a tuned circuit which varies the attenuation of the feedback,path in a suitable manner. Amplifier employing a demodulator. In the Figure signals from a pick-off (not shown) are applied to transformer 36, feeding balanced demodulator valves 40<1>, 41<1>, the demodulated outputs of which are amplified by A.C. operated valves 96 and 97, and fed to A.C. operated valves 137 and 136 so that differentially varying currents appear in the actuating coils 87 and 88 of an electro-hydraulic torque motor. The voltages applied to valves 137 and 136 are caused to contain first and second derivative components by providing an integrating feedback network 23<1>, a rectifier 131 serving to provide a suitable bias for valves 40<1>, 41<1>. Amplifier without demodulator. Integrating and differentiating feedback networks made up of ordinary resistors and self-heating temperature sensitive resistors, the thermal capacity of which is utilised to introduce differential or integral components (as in Figs. 2, 3; 5 and 6, not shown), are used if the servo system using the amplifier is such that demodulation of the pick-off signal is not required. Alternatively, the feedback network may consist of a tuned circuit (e.g. one of those described in Specification 612,426); which attenuates or enhances the sidebands with respect to the carrier. Other modifications of the embodiment shown. The byepass capacitors 151, 152 may be replaced by a single capacitor of such a value that it resonates with the effective inductance of a transformer whose centre tapped primary replaces the windings 87 and 88, the resultant A.C. output across the transformer secondary being used to actuate a twophase servomotor. The stages 401, 411 may be omitted, in which case valves 96 and 97 are arranged to act as demodulators (Figs. 8 and 10, not shown). The Specification as open to inspection under Sect. 91 also describes various integrating or differentiating feedback circuits made up of resistors in association with inductors and/or capacitors, and also alternative methods of deriving the feedback voltage, namely, from the armature of the servomotor, or from an associated generator in the case of an electrical servomotor, and from a pressure actuated pick-off in the case of a hydraulic servomotor. This subject-matter does not appear in the Specification as accepted.
Patent GB-1284650-A (GB)
Title: Improvements relating to support systems for the seated human body
Inventor: BLOOMFIELD JACK
IPC: A47C7/22
Filed: 1970-04-22
Abstract: 1284650 Chairs BRITISH RAILWAYS BOARD 19 April 1971 [22 April 1970] 19285/70 Addition to 1257927 Heading A4J In a seat according to the parent Specification, comprising a flexible web mounted under tension in a supporting frame, the back-supporting length of the web includes a forwardly-projecting portion arranged to support the upper pelviclumbar region of an occupant and is constrained below the projecting portion by a transverse member of the frame, to tension it longitudinally. The web may be extended to form a seat portion. In the form shown, a tubular-metal frame formed of side members 13, 14 and cross-bars 15, 16, 17 enters pockets 4, 5 formed at the ends of a single length of netting to form head-rest and seat-front portions, the ends of the netting being attached to bars 6, 7 of the frame. The middle part of the netting is secured to parts 8 of a sub-frame, to form the forward projection, and passes behind a bar 9 forming part of the sub-frame; the bar 9 is curved to shape the netting above it. The subframe is pivoted to the main frame members 13, 14 on an axis 19 so that it can be forced against the netting to tension it; it may be held in the required position by springing behind the members 13, 14 or by any other means such as a screwthreaded adjusting mechanism. In a modification, Fig. 4 (not shown), the frame parts 8 are rigid with the members 13, 14 and the tensioning bar 9 is separate from the frame and is mounted on a pair of arms pivoted to these members at about the middle of the seat. Instead of the back and seat being formed of a single length of netting, they may be two independent lengths Fig. 2 (not shown), the back being anchored to a bar such as 9 and the seat to an adjacent bar on the frame. The latter bar may then be carried on arms pivoted at about the middle of the seat; the back portion of the netting may be attached to a bar carried on short pivoted arms projecting rearwardly from the main frame members, or may pass round a bar fixed at a position rearwardly of the main frame and be attached to a bar fixed at the base of the back-supporting part of the frame. The side frame members 13, 14 may be shaped for mounting on a separate base, which may carry a row of seats. The bars to which ends of the netting are attached may fit into hems formed in the netting, and additional hems may be provided for adjustment; alternatively, they may be fixed to the bars and the latter rotated on their own axes for adjustment. In another form using two lengths of netting, Fig. 7 (not shown), the main frame members are formed in two parts, the seat parts being fixed to side arm supports and the back parts being pivoted thereto on an axis corresponding with the hip joint of an occupant.
Patent GB-478141-A (GB)
Title: Improvements in and relating to processes for the manufacture of butyl alcohol from ethyl alcohol
IPC: C07C29/34
Filed: 1936-07-13
Abstract: Butyl alcohol, with relatively small quantities of ethyl acetate and other oxygen-containing products, is produced by passing ethyl alcohol vapour at 10--100 atmospheres pressure at a speed of at least 20 and preferably 50--100 mol. per hour per litre of catalyst over a catalyst containing at least 60 per cent of magnesium compounds (or mixtures of magnesium compounds with compounds of other light metals) together with a small proportion of copper, silver, manganese, iron, chromium, tungsten, zinc, tin, nickel, or cobalt or a compound thereof.  The alcohol may contain inert gases such as hydrogen.  In examples butyl and hexyl alcohols and ethyl acetate, and some caproic acid, are produced from ethyl alcohol.  Specification 364,134 is referred to.  According to the Specification as open to inspection under Sect. 91 the process is effected "at a high pressure preferably 10--100 atmospheres."  This subject-matter does not appear in the Specification as accepted.
Patent GB-1137651-A (GB)
Title: Method of making reproductions from heat-sensitive material
IPC: B41M5/36
Filed: 1966-05-03
Abstract: 1,137,651. Thermographic materials and processes. KEUFFEL & ESSER CO. May 3, 1966 [May 3,1965], No.19505/66. Heading G2C. A thermographic process comprises coating a coloured or uncoloured support with an uncoloured or coloured polymeric latex to form a fluidpermeable particulate layer, imagewise exposing heat to coalesce the particles and render them fluid impermeable, developing the image with a developer which either decolourizes or colours the uncoalesced areas and/ or the support through the fluid-permeable areas and then optionally removing the uncoalesced particles. In the examples, a regenerated cellulose support is coated with a latex of an acrylate, polyvinyl acetate, polyethylene or polystyrene and dyed with an aqueous solution of dye. The material is imagewise exposed to heat and washed with water to remove the dye from the non-coalesced areas to leave a positive dye image. A negative dye image is obtained when an aqueous dye solution is applied to an undyed and exposed material. The support may be subbed with a gelatine layer which accepts the dye. Multicolour images are produced by coating a support with a latex containing a dye, imagewise exposing and washing to remove dye from uncoalesced areas and then repeating the coating, exposing and washing steps.
Patent GB-443408-A (GB)
Title: Manufacture of chloropyrenequinones
Filed: 1935-07-08
Abstract: Chlorpyrenequinones are obtained by treating pyrenequinone with a chlorinating agent.  Preferably a solvent or diluent such as water, acetic acid, benzene, chlorbenzene, trichlorbenzene, chlornaphthalene, nitrobenzene, tetrachlorethane, chloroform, sulphuric acid or chlorsulphonic acid, and a halogen carrier such as iodine, iron, an iron salt, zinc chloride or antimony pentachloride is employed.  Mono-, di-, tri- or tetrachloro derivatives are obtained.  In examples, pyrenequinone is treated with chlorine in trichlorbenzene and in presence or not of iodine to give ditri- or tetrachloro derivatives.
Patent GB-1425959-A (GB)
Title: System for overcoming faults in magnetic anisotropic material
IPC: G11C11/14
Filed: 1973-04-25
Abstract: 1425959 Data storage SINGER CO 25 April 1973 ;[8 May 1972] 195S6/73 Heading G4A Access to faulty parts of a memory is prevented by a control register which has entered into it information recovered sequentially from the memory and identifying the faulty parts. The invention is said to be applicable to mass produced memories, particularly of the magnetic bubble or charge-coupled type. Testing of memory and loading control register. The memory shown comprises data registers 52-58, a control register 76 and row and column marker registers 78, 79 with a common transfer loop 61. Initially marker bits generated at 65 are entered in registers 78, 79 via loop 61 by energization of a write circuit 67 and transfer circuit 70 at appropriate instants. Arrival of the marker bits at read heads 84, 83 respectively signifies that the data registers 52-58 and control register 76 are at a datum position in their recirculation cycles. Loop 61 is then filled with bits and write circuit 63 is energized to transfer a bit into each register 52-58, after which all the registers are shifted one position and a second bit is transferred to each of registers 52-58. At this point the second of a pair of marker bits in each register 78, 79 is aligned with read heads 84, 83. The remaining bits are cleared from loop 61 by energizing erase circuit 68. When all the registers are subsequently in their datum positions, energization of transfer circuit 63 in the reverse sense causes transfer of the first bit in each pair of be transferred from registers 52- 54 and 57, 58, it being assumed that registers 55, 56 contain a flow which prevents complete circulation. The second bit of each recirculated pair is likewise transferred to loop 61 after a further shift by one position. The bits in loop 61 are subsequently transferred from loop 61 to control register 76 over transfer block 72, the bit pairs corresponding to the useful data registers. The presence of these bits at head 77 controls the transfer of information into loop 61 from generator 65 so that no information is passed into the faulty registers, and similarly, the presence of bits at head 75 identify the instants at which bits from the useful registers are aligned with output read head 74.
Patent GB-891497-A (GB)
Title: Radially vibratile ceramic transducers
IPC: B06B1/06
Filed: 1959-06-08
Abstract: 891,497. Piezo-electric motors. BENDIX CORPORATION. June 8, 1959 [June 23, 1958], No. 19557/59. Class 35. [Also in Group XXXIX] Liquid vibrating apparatus suitable for ultrasonic cleaning includes a hollow, approximately cylindrical electro-mechanical transducer 14, Fig. 2, e.g. of barium titanate, having thin flat rings 24, 25 bonded to its ends and rubber sealing rings 26, 29 bearing against the rings 24, 25. The rings 24, 25 are of greater radial width than the radial thickness of the cylinder wall. A rigid casing comprises an upper end wall 10, a lower end wall 11 and a cylindrical wall 12, the parts being clamped together by bolts 13. Very thin inner and outer electrodes 15, 16 of silver are deposited on the transducer 14, and are connected to leads 17, 19, Figs. 2, 3. The lead 19 is connected to a tab forming part of the electrode 15 and extending over the upper end surface of the transducer 14. A gasket or cemented joint 30 is provided between the lower inner surface of the cylinder 12 and a shoulder on the wall 11. A sealing ring 31 in a groove 32 in the upper end wall 10 bears against the inner surface of the wall 12. The upper end wall 10 may be open and the lower end wall closed by a lead disc 35 or by cellular rubber. The apparatus may be fixed to an inwardly directed flange 37 of a cylindrical tank 38, Fig. 4, or several units may be used together, Fig. 5. The apparatus may be open at both ends and embrace a pipe of rubber or thin metal, Fig. 6, a flange at each end being clamped by a clamp 45 to a seal 44. The chamber is filled with liquid, e.g. water or castor oil. Alternatively, the pipe may be cut and its ends secured to the flanges 43, Fig. 7, not shown.
Patent GB-1377249-A (GB)
Title: Production of glycidol
IPC: C07D301/14
Filed: 1972-04-27
Abstract: 1377249 Glycidol from allyl alcohol DEUTSCHE GOLDUND SILBER-SCHEIDEANSTALT 27 April 1972 [14 May 1971] 19617/72 Heading C2C Glycidol is made by reacting allyl alcohol with a pure aqueous C 2-5  percarboxylic acid at 0-45‹ C., and separating glycidol from the reaction mixture. The glycidol may be purified by rapid distillation under reduced pressure.
Patent GB-1485550-A (GB)
Title: Method of manufacturing a cathode ray tube for displaying coloured pictures
IPC: H01J9/227
Filed: 1975-05-09
Abstract: 1485550 Colour television tubes PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 9 May 1975 [13 May 1974] 19630/75 Heading H1D To manufacture a luminescent screen surrounded by a dark frame 5 on the window 1 of a colour CRT the window is coated internally 8 with a photo-resist containing dark pigment, e.g. Fe 2 O 3 , manganese oxide, cobalt oxide. The coating is exposed to actinic light directly or through the glass, the future screen area being masked 9: the unexposed resist is removed before the luminescent screen is formed conventionally over the whole window area, masked from the front by the pigmented frame. The resist comprises a dried film of aqueous polyvinylalcohol, ammonium dichromate, ethylene glycol and pigment, washed off in hot water where unexposed. The temporary mask 9, other than the shadow mask, is smooth-edged and accurately centred on the window.
Patent GB-165341-A (GB)
Title: Improvements in or relating to lubricating systems
IPC: F16N11/04
Filed: 1920-07-08
Abstract: 165,341. White, A. E., (Bassick Manufacturing Co.). July 8, 1920. Force-feed lubricators; indicating.-A grease cup for motor-vehicles &c. having a spring- pressed plunger is filled from a grease gun detachably connected to the cup, and the lubricant first floods the bearing until the resistance causes the plunger to move. After the plunger has moved to its limit against the end of the cup, the pressure is still further increased, and lubricant is delivered direct to the bearing at high pressure. On disconnecting the grease gun, lubricant is fed gradually to the bearing under the action of the spring-pressed plunger. The coils of the spring are adapted to lie in one plane when compressed. In the form shown in Fig. 1, the filling-tube 28 is adapted for connection to a grease gun by a bayonet-joint, and is provided with a spring- pressed ball valve 30. Attached to the plunger 24. which has a cup-leather 23, is a pin 26, which serves to indicate the quantity of lubricant in the cup. A. nut 26<1> is screwed on the pin 26 to provide adjustable means for a predetermined movement of plunger. In the form shown in Fig. 5, the filling-tube 28<d> extends through the plunger, which slides on it and in the cup. An indicator pin 26d is provided. In another form, Fig. 13, the plunger is secured to the end of the discharge tube 27<h>, and is stationary, the cup moving downwards as grease is expelled, the relative positions indicating the grease contents. In the form shown in Fig. 15, the filling-tube 28<i> is secured direct to the plunger and serves to indicate the grease contents. Other forms are shown and described. The cup may have glass walls, or may have an inner cylinder of glass with an outer slotted metal cylinder.
Patent GB-585273-A (GB)
Title: Improvements in or relating to adjustable drawing dies
IPC: B21C3/06
Filed: 1944-10-12
Abstract: 585,273. Drawing-dies. TOOL & STEEL PRODUCTS, Ltd., FROLICH, H., and DEWSNAP, C. Oct. 12, 1944, No. 19661. [Class 83 (iv)] An adjustable hexagonal drawing die has six jaws 13 clamped in a holder 10 by screws 11, 12. Each jaw carries co-operating convex and concave faces 15, 16, the overlapping convex faces form a die orifice more flared at entrance than exit. The screws 11, 12 are parallel to the convex and the concave edges and may be graduated to indicate the adjustment. Specification 577,235 is referred to.
Patent GB-446938-A (GB)
Title: Improvements in direct current voltage changer
IPC: H02M3/34
Filed: 1935-07-10
Abstract: 446,938. Converting. TELEFONAKTIEBOLAGET L. M. ERICSSON, 18, D÷belnsgatan, Stockholm. July 10, 1935, No. 19708. Convention date, July 12, 1934. [Class 38 (ii)] Relates to a D.C. voltage changer of the type having transformers T1, T2 which are sequentially connected between the supply and load circuits 10, 11 and 12, 13 by periodically operating contacts Kp, Ks and have condensers C1, C2 connected in parallel with the transformer primaries and consists in adjusting the frequency of oscillation of the oscillatory circuit formed by the condensers and associated windings so that the voltage at the completion of the transformer circuit is the same as at the break. This avoids sparking at the contacts. In a modification, the transformer connections are reversed in sequence by means of rotary commutators. In this form the oscillatory circuit is adjusted so that the voltage at make is equal and opposite to the voltage at break. The condensers may be connected to tertiary windings on the transformers. In a further modification of this, centre-tapped windings with single contact commutators are used. Specification states that the source of D.C. should have a small internal reactance, e.g. a storage battery, and if the source consists of a generator which has a comparatively large reactance as storage battery a large condenser should be connected in parallel to supply the variable exciting current required.
Patent GB-275957-A (GB)
Title: A device for grinding longitudinal grooves in bores by means of a rotary grinding disc
IPC: B24B19/02
Filed: 1927-07-25
Abstract: 275,957. Soc. Anon. A. Saurer. Aug. 11, 1926, [Convention date]. Disc apparatus.-In a machine for grinding grooves in bores, for example, keyways in wheel bosses, the grinding-wheel i is driven by a turbine to which fluid is supplied through a pipe 4 from a vessel 3 by a pump 2. The fluid employed is suitable, for cooling the work and tool for example, petroleum, and after leaving the turbine passes through the work and the spindle 6 of the work table 5, returning to the vessel 3; the fluid is partially choked up within the work and thus effectively cools it and the wheel. The wheel i is supported in a holder a adjustable on a slide 19, which is reciprocated vertically on a transversely adjustable slide 22 by a lever 18 moved by a cam 13; the cam is connected to a spur wheel 12 driven from the shaft of the pump. The slide 22 is mounted on a head 23 which is reciprocated on the machine frame 24 by a lever 27 actuated by a cam 28 connected to the gear 12, and the table 5 is rotated intermittently by a pin 29 on the gear 12 and a gear wheel 31 having three radial slots 30; a pin 35 lifted by a cam 36 locks the table.
Patent GB-765359-A (GB)
Title: Improvements in or relating to fuel supply systems
Inventor: CUMMINGS LINN FRANK
Filed: 1954-07-06
Abstract: 765,359. Gas turbine plant. WESTING- HOUSE ELECTRIC INTERNATIONAL CO. July 6, 1954, No. 19748/54. Class 110 (3). [Also in Groups XI and XXIX] A fuel supply system for effecting equal flows of fuel from a pump or other source of fuel under pressure to the atomizing nozzles 24 of an aircraft gas turbine power plant comprises a distributing valve device 22 having a fuel receiving chamber 34 connected at 35 to the pump, a rotary valve 40 adapted to vary the flow areas of ports 37 leading to the nozzles according to the fuel pressure in the chamber 34, and a spring-loaded valve 52 for establishing a control pressure which is also operative on the valve 40, the flow path to each nozzle 24 being provided with a flow equalizing valve 23 responsive to the opposing effects of the pressure of fuel flowing through the respective port 37 and the control pressure. The valve 52 is adjustably loaded by a spring 56, and sets up a back pressure (which is the control pressure) in a passage 59 and in conduits 68 leading to the flow equalizing valves 23. The latter each comprises two chambers 65, 67 separated by a diaphragm 64 connected to a slide valve 71 controlling a port 72 leading to the respective nozzle 24. The chambers 67 are open to the common control pressure and the chambers 65 to the fuel pressures at the respective ports 37. The valve 40 has ports 41 co-operating with the ports 37 and has an axial shaft 42 connected by a linkage 46 to a spring-loaded diaphragm 43 movable between adjustable stops 47, 48. One side of the diaphragm is open to the pressure in the receiving chamber 34 and the other to the control pressure in the conduits 68. Reference has been directed by the Comptroller to Specification 735,845, [Group XXIX].
Patent GB-651224-A (GB)
Title: Improvements in or relating to electro-magnetic movement damping devices
IPC: G01R11/10
Filed: 1948-07-23
Abstract: 651,224. Vibration-dampers. BLACKBURN & GENERAL AIRCRAFT, Ltd., (formerly BLACKBURN AIRCRAFT, Ltd.), SAUNDERS, C. G., and PIPER, R. H. July 23, 1948, No. 19787. [Class 108(iii)] In an electromagnetic damping device of the type in which a closed circuit coil, fast with a movable part the movement of which is to be damped, i s arranged to move in a magnetic field such that the movement of the coil is resisted by the field produced by the induced electromotive force, the coil is formed as a cylinder movable in an annular space formed by a central cylindrical pole and an embracing complementary pole of an electromagnet, the energizing coil of which is disposed around the central pole so that the coil moves in the field of greatest intensity. In the arrangement shown, as applied to a damper for a weigh beam used as part of test equipment in aeronautical wind tunnels, a coil 5, wound on a linen former and secured to a movable part M connected to the beam, is slidably located in an annular space 4 between the recessed end of a cylindrical pole piece 1 and surrounding pole piece 3. When the beam is balanced, the coil 5 is short-circuited through normally closed contacts of a relay, which is energized to open these contacts through additional contacts associated with the relay, when the beam moves in either direction from the position of balance. The electromagnet is energized through a variable resistance and the relay may be energized through normally closed contacts of an auxiliary relay which is energized to open these contacts and maintain the first relay de-energized, irrespective of the movement of the beam.