baber/WOPTO huggingface dataset:
Patent GB-926471-A (GB)
Title: Improvements in or relating to servo systems
Inventor: MEREDITH DENNIS LELLO
IPC: G05D1/00
Filed: 1960-12-21
Abstract: 926,471. Automatic control. S. SMITH & SONS (ENGLAND) Ltd. Dec. 1, 1961 [Dec. 21, 1960], No. 43845/60. Addition to 856,826. Drawings to Specification. Class 38 (4). As in the parent Specification signals dependent on a common control quantity are applied to a plurality of amplifiers each of which energizes a servomotor operating a common load and the transmission characteristics of each of a number of the amplifiers is controlled in dependence on a comparison between the output of that amplifier and a common reference quantity. In the present Specification each amplifier, which may be thermionic valve, transistor or magnetic, comprises a variable gain pre-amplifier and a main amplifier in cascade, the output of one of the main amplifiers serves as the reference, and signals resulting from the comparisons vary the gains of the pre-amplifiers and are also fed back to the inputs of the preamplifiers. An elevator channel of an aircraft automatic pilot having three sub-channels of the rate/rate type, one serving as the master, is described in which the sense of the variation of pre-amplifier gain is made dependent on the sense of pre-amplifier input and the feed-back to each pre-amplifier input is applied through two parallel paths, one including an electromechanical integrator for long-term errors and the other including an attenuator and limiter for short-term errors. Control signals from rate gyros, pendulums and radio altimeters, addition of differential and integral components to the control signals, torque-limiting clutches between the servomotors and the load, and automatic substitution of another sub-channel as master if the master channel fails are referred to. Specification 901,458 also is referred to.
Patent GB-1168483-A (GB)
Title: Backscatter Fog Measuring Instrument
IPC: G01N21/53
Filed: 1966-09-30
Abstract: 1,168,483. Transistor time delay circuits. HOFFMAN ELECTRONICS CORP. 30 Sept., 1966 [30 Sept., 1965], No. 43847/66. Heading H3T. [Also in Division G1] A photo-electric fog detector (see Division G1 operates a device in which the switch-on and switch-off are delayed. In the delay circuit the signal from a phase-sensitive rectifier 41 which is positive in foggy conditions is applied to a transistor 78 which conducts when the signal is at all positive, the base/emitter voltage being offset by a diode 79 with an equal forward voltage drop. Conduction of 78 cuts off a transistor 85 allowing the capacitor 87 of a first delay circuit to charge. After a predetermined delay transistors 88, 95 and 100 conduct and through transistors 108, 109 111, 117, 118, 127 and 130 switch on a driver transistor 131 to supply current to an alarm relay. When foggy conditions cease, 78 cuts off, switching on 85. This discharges the capacitor 87, cutting off 88, 95 and 100 without delay. The conduction of transistors 108 and 109 is delayed until capacitor 115 has discharged sufficiently through resistors 103, 102, 101 and 114, which may take several minutes. When 108 and 109 conduct, 117 is cut off and 118, 127 and 130 conduct with the result that 131 is cut off and the relay deenergized.
Patent GB-1280509-A (GB)
Title: An improvement in or relating to means for securing pulleys and the like on shafts
Inventor: CHAFFEY STEPHEN JOHN
IPC: F16D1/08
Filed: 1969-09-04
Abstract: 1280509 Mounting pulleys &c. on shafts; screwed sockets S J CHAFFEY 11 Nov 1970 [4 Sept 1969] 43860/69 Headings F2H and F2U A key 10 for securing a pulley &c. on a shaft comprises full-width slit 12 extending axially from one end with a screw threaded hole into which can be inserted a screw 16 to expand the key (e.g. radially of the shaft when in axially extending key ways in the shaft and pulley. The thread in the hole may be tapered to run out at the inner end of the slot.
Patent GB-1009223-A (GB)
Title: An electrical resistance welding machine
IPC: B23K11/04
Filed: 1962-11-21
Abstract: 1,009,223. Welding by pressure. SIEMENS SCHUCKERTWERKE A.G. Nov. 21, 1962 [Nov. 21, 1961], No. 44103/62. Heading B3R. In an electrical butt welding machine having guide means 4 mounted on a frame 2, a carriage 6 mounted on the guide means for movement on the frame and a clamping stand 5 for a workpiece carried on the carriage, a side wall 12, 13 projects downwardly from the carriage and co-operates with a wall 14, 15 extending towards a vertical line passing through the centre of the carriage to shield the guide means. The frame 2 supports a structure 3 carrying guide rails 4 and the carriage 6, an upsetting carriage, carries a clamping stand 5 on its box-like platform and has guide rollers 7 co-operating with the rails. The lower plate 11 of the platform has downwardly projecting walls 12, 13 which have horizontal extensions 14, 15, the walls shielding the rails and rollers and the bearings 16 of the rollers. The carriage is driven by a spindle 10. Flash butt welding is referred to.
Patent GB-1359625-A (GB)
Title: Junction units for lattice-work
IPC: E04B1/19
Filed: 1972-09-25
Abstract: 1359625 Structural joints K THOMSEN 25 Sept 1972 [29 Sept 1971] 44196/72 Heading F2M In order to interconnect member 7, of a tubular framework, and a ball 1, a tool is inserted through threaded bore 2 to turn screw 12. The screw has an unthreaded shank 11 extending through a threaded bore in a fixed plate 10. Initially, a threaded end portion of the screw 12 is engaged with the threaded bore in plate 10. As this end portion is screwed out of plate 10, so the tip of the screw engages and mates with the thread of the bore 2. In another form, the bore in plate 10 is unthreaded and the screw is urged towards the free end of the member 7 by means of a spring (16, Fig. 2, not shown). If the spring is omitted, the tool may draw the screw through the plate 10 by magnetic force, or a friotional or threaded interengagement.
Patent GB-1183462-A (GB)
Title: Improvements in Arc Welding Electrodes
Inventor: BLAKE PAUL DESMOND
IPC: B23K35/36
Filed: 1966-11-01
Abstract: 1,183,462. Welding by fusion. MUREX WELDING PROCESSES Ltd. 29 Sept., 1967 [1 Nov., 1966], No. 44483/67. Divided out of 1,183,461. Heading B3R. [Also in Division C7] A continuous electrode for welding without shielding gas or additional flux comprises a mild steel sheath enclosing a core constituting 30- 40% by weight of the electrode and containing: 0-40% iron powder 4-30% aluminium powder 0-15% manganese oxide 0-15% silica 0-10% potassium titanate 0-10% carbonate 10-40% fluoride 8-65% oxide of chromium and/or molybdenum and/or nickel 0-15% ferro-manganese. The fluoride is calcium fluoride alone or mixed with one or more of 7-35% cryolite, up to 20% sodium fluoride, up to 7% potassium fluoride and up to 12% potassium silicofluoride. The carbonate consists of one or more of calcium, barium, strontium and magnesium carbonate. The silica may be in the form of a mineral such as felspar or wollastonite. The electrode deposits welds containing 0À05-0À8% aluminium. The electrodes may produce hard facing deposits or deposits of high tensile steel containing 1À25% chromium and 0À5% molybdenum or 2À25% chromium and 1% molybdenum.
Patent GB-1394313-A (GB)
Title: Endless tape transporting device
IPC: G11B15/70
Filed: 1973-09-24
Abstract: 1394313 Tape reels; endless tape TOKYO SHIBAURA ELECTRIC CO Ltd 24 Sept 1973 [22 Sept 1972] 44598/73 Heading B8M [Also in Division G5] An endless tape transporting device comprises a supporting rod 21 on which a reel 10 is rotatably mounted, the reel comprising a reel body having in its peripheral side surface an annular groove 24 V-shaped in cross-section, the reel body holding an endless tape on its peripheral side in the form of a laminated coil 25 to permit the tape to be wound on the outermost layer and delivered from the innermost layer thereof through said annular groove 24, and a flange 26 projecting an extent of 0À5-2À0 mm. radially from a peripheral edge of the reel, and means to support the laminated coil. The rod 21 is mounted on a base 20 preferably in a magnetic tape recording/reproducing apparatus, the reel being freely rotatable by means of ball bearings 23. The coil 25 is supported on supporting rolls 28 equiangularly spaced around the periphery of the reel and may be idler rolls or driven, at a peripheral speed slower than the tape travelling speed, by means of transmission wheel 31 contacting the flange 26 of the reel. The flange 26 is preferably made of stainless steel. The supporting roll 28 is positioned a distance b less than 2À0 mm. from the flange periphery. The angles α and # of the inclination of the sides of the V- shaped groove are preferably 60 and 45 degrees respectively.
Patent GB-1460939-A (GB)
Title: Transfer printing
IPC: B41M5/035
Filed: 1974-10-15
Abstract: 1460939 Transfer printing STOREY BROS & CO Ltd 9 Oct 1975 [15 Oct 1974] 44647/74 Heading D1B A printed support used in transfer printing comprises a paper support to one surface to which has been applied a pattern of sublimable dye or dyes, the other surface having been treated with a lacquer which reduces the permeability of that surface of the paper support to the diffusion of sublimed dyes. The lacquer may be based on casein, gelatin, carboxymethyl cellulose, or any combination thereof, may additionally contain a silicone and is preferably applied at 0.5 to 50 gms per square metre. The lacquer may render the surface of the paper non adherent and/or non- receptive to sublimable dyes.
Patent GB-1521280-A (GB)
Title: Recording of video camera signals on magnetic tape
IPC: H04N5/765
Filed: 1975-10-29
Abstract: 1521280 Video camera/recorder EASTMAN TECHNOLOGY Inc 29 Oct 1975 [29 Oct 1974] 44710/75 Heading H4F Apparatus for recording video signals, derived from a camera, on a medium having a synchronization track, comprises means for controlling the horizontal scan of the camera according to signals on said sync. track so that the horizontal scans of the camera are of constant width. As described, prerecorded signals 24 on track 22 of magnetic tape 20 are compared with horizontal sync. signals from scan signal generator 14, the result of the comparison being used to vary the rate of generator 14. The video signals produced by image sensor 12 (preferably a charge coupled device or vidicon) are fed to the recording head 18 through a processor 16 which may, for example, insert blanking pulses into the video signal. By using sync. pulses 24 at line frequency it can be seen that the video signal representing one line will fill the tape space between two pulses irrespective of variations in the tape drive speed. In a more detailed embodiment, Fig. 4 (not shown), the output of a phase comparator controls the charge rate of a capacitor in a Miller integrator circuit providing the horizontal sweep signals, which signals are also provided to a Schmitt trigger and one-shot in series for production of blanking pulses. The vertical sweep generator circuit is coupled to the horizontal circuit to vary the vertical scan rate. The sweep signals are not only used to drive the sensor 12 but to drive a monitor C.R.T. so that the recorded picture may be viewed at the time of recording. In a further embodiment (Fig. 5, not shown) the sync. track produces 500 kHz clock pulses which are fed to a phase locked loop whose VCO generates at 4 MHz. Comparison is made possible using a frequency doubler in the path of the clock pulses and two binary dividers in the phase locked loop. The 4 MHz signal drives an 8 bit binary counter in series with a D/A converter, which produces a stepped sawtooth which can be smoothed by filtering. The vertical scan sawtooth is produced in a similar way.
Patent GB-970046-A (GB)
Title: Input circuit for receivers operating at frequencies of 250í¬900 mc/s
IPC: H03D7/18
Filed: 1960-12-30
Abstract: 970,046. Resonant structures. TESLA NARODNI PODNIK. Dec. 30, 1960 [Jan. 16, 1960], No. 44771/60. Heading H1W. A radio-frequency tuning arrangement comprises a butterfly circuit Co, Lo 1 , Lo 2  and input and output capacitative impedance transformers respectively C 1 , C 2 , C 3  and C 4 , C 5 , C 6  connected as shown. The circuit is stated to present constant input and output impedances over a wide tuning range if where C 7  and C 8  are the parasitic capacitances of the symmetrical halves of the circuit. An analysis of the arrangement is given in the Specification. The butterfly circuit may comprise a rotor 1 arranged on a ceramic shaft 2 and two sets 3, 4 of segmental stators. The inductances Lo 1 , Lo 2  are provided by circular members 15. The inner and outer conductors of the input coaxial line are respectively connected to metallic supporting members 8, 10. Interposed between the supporting members and the stators are dielectric inserts 6, 12 which respectively provide the capacitances C 1 , C 3 . A gap between the supporting members 8, 10, adjustable by a screw 14, provides the capacitance C 2 . The output circuit comprises a similar arrangement.
Patent GB-1123232-A (GB)
Title: Improvements in or relating to spring clips
Inventor: COLEMAN DAVID GEORGE
IPC: F16L3/04
Filed: 1964-11-05
Abstract: 1,123,232. Clamp fastenings. WILMOTBREEDEN Ltd. 1 Nov.. 1965 [5 Nov., 1964], No. 45091/64. Heading E2B. A spring clip has a base 5 with a pressed out tongue 10 by which it can be clipped to the edge of a panel 2, and two projecting limbs 6, 7 between which a member 3 to be mounted can be gripped the base having a hole 8 and one of the limbs 7 being formed for engagement by a screw 9 passing through that hole and the panel to flex that limb from a normal position in which the member can be inserted between the limbs to a gripping position in which the member is gripped between the limbs. In the construction shown the limb 7 is formed with a hole 15 to receive the screw 9 and on opposite sides of the hole are two arched prongs 16 pressed up on the side away from the base 5; the prongs engage the screw thread and tightening of the screw causes the prongs to increase their grip on the screw thread. The limb 7 is provided with an end portion of generally triangular shape, which has an apex 19, which when the screw is tightened engages the base so that the limb 7 turns about the apex 19 as a fulcrum, so that an unduly high gripping force cannot be applied to the member 3. The limb 6 has a pressed-up strengthening web 14 at the bend where it adjoins the base so that the limb is relatively inflexible. The tongue 10 is provided with a bent up prong 13 which engages the panel in the manner of a barb. As shown the member 3 is a split tube of a window regulator assembly.
Patent GB-996709-A (GB)
Title: Polymerisable polyesters
IPC: C09D167/06
Filed: 1962-11-29
Abstract: Copolymerizable polyesters are obtained by reacting together a dicarboxylic acid, a dihydric alcohol and a monohydric alcohol of formula <FORM:0996709/C3/1> where (a) is an unsaturated and unbranched aliphatic hydrocarbon radical and (b) is a saturated or unsaturated aliphatic hydrocarbon radical or an aromatic hydrocarbon radical bonded directly to the oxygen atom.  The dihydric alcohol may be in the stoichiometric proportion required to completely esterify the dicarboxylic acid, and the monohydric alcohol may be in a proportion to provide 10 to 20% of the hydroxyl groups provided by the dihydric alcohol.  The polyesters may be cross-linked with styrene or vinyl acetate.  In examples, polyesters are prepared from maleic anhydride, phthalic anhydride, ethylene glycol, 1-allyl, 3-phenyl di-ether of glycerol and 1,3-di-allyl ether of glycerol, and the polyesters dissolved in xylene are mixed with styrene, methy-ethylketone peroxide catalyst and cobalt octoate accelerator to form a varnish.
Patent GB-1350278-A (GB)
Title: Electrophotographic element
IPC: G03G5/047
Filed: 1971-09-30
Abstract: 1350278 Electro-photographic element MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 30 Sept 1971 [7 Oct 1970 8 Oct 1970 (3) 13 Oct 1970] 45602/71 Heading G2C  An electro-photographic element comprises a conductive support, a photo-conductive layer comprising at least one of poly-N-vinyl carbazole, poly N- alkenyl carbazole, or a nuclearsubstituted poly -N-vinyl carbazole and a layer 0À1 to 1 Á thick of at least one of these polymers and an organic sensitizer, the photo-conductive layer and the sensitizer-containing layer being 3 to 30 Á thick. The sensitizer may be a pyrylium, thiapyrylium, carbonium or benzopyrylium salt or the reaction product of a benzopyrylium salt with a pyrane. The photo-conductive layer is formed by coating the support with an organic solvent solution of the poly carbazole optionally containing a plasticizer e.g. chlorinated diphenyl or an epoxy resin and a resin e.g. a polycarbonate. After the photo-conductive layer has dried its top surface is coated with a solution of the sensitizer or a leuco base thereof using a solvent which will partially dissolve the photoconductive layer. Alternatively the sensitizer may be vacuum deposited and the deposited surface exposed to solvent vapour. The solution of sensitizer may contain a plasticizer, a polycarbonate and a monomer corresponding to the polymer of the photo-conductive layer. The sensitivity of the element can be enhanced by heating.
Patent GB-1235712-A (GB)
Title: Electrical switching circuit
IPC: H03M1/00
Filed: 1968-09-27
Abstract: 1,235,712. Semi-conductor switching circuits. INTERNATIONAL BUSINESS MACHINES CORP. 27 Sept., 1968 [2 Oct., 1967], No. 45906/68. Heading G4H. [Also in Division H3] In an electrical switching circuit having first and second resistors R11 R12 connected in series between a reference voltage VIN and an output terminal, a first semi-conductor switch T1 is connected between the junction of the resistors and a second reference voltage and a second semi-conductor switch T2 is connected between the output terminal and the second reference voltage and the switches T1, T2 are controlled so as to switch ON or OFF together such that when the switches T1, T2 are ON the first switch T1 operates at a level where the internal resistance is at a minimum and the second switch operates at a level where the voltage offset (Vec) is at a minimum. As shown the switching circuit forms part of a digital to analogue converter feeding an operational amplifier 10. The above operating conditions are satisfied by arranging the bias circuits of T1 and T2 such that T1 conducts more than T2. The state of the semi-conductor switches T1, T2 are controlled by logic pulses at 15 controlled by transistor TS. With TS ON, diodes D1 and D2 are both ON and transistors T1, T2 are OFF. When TS is OFF, diodes D1 and D2 are OFF and ON respectively and the transistors T1 and T2 are biased ON, T1 more than T2. This decreases the input to the operational amplifier the output from which goes from negative to positive. Other similar switching circuits are shown T3 to T8 each reducing the output by a smaller amount. The resistor R2 acts as a dummy load to maintain a constant load on the positive power supply 11 when transistors T1 and T2 are OFF. Zener diodes (not shown) are used as voltage references for the power supply 11. The output from the digital to analogue converter may be used for the deflection voltages for a flying spot scanner in an optical character reader.
Patent GB-1004801-A (GB)
Title: Improvements in or relating to a method of and apparatus for sampling liquids
IPC: G01F5/00
Filed: 1963-11-21
Abstract: 1,004,801. Sampling liquids. C. W. MAXWELL. Nov. 21, 1963 [Nov. 29, 1962; March 28, 1963], No. 46082/63. Heading B8N. Apparatus for sampling a flow of liquid such. as milk, comprises a flow control means 21, 14a, 18a for providing a uniform flow of liquid, means 16, 17 for dividing the flow into a plurality of separate flows at. least one being a sampling flow which is collected by means 16a, 17a, 9, 10 into a sampling vessel 24, the remainder of the liquid being discharged from the apparatus via means 30, 43. An inlet pipe 1 passes through the sampling vessel 24 and is provided with a shield member 5 supporting, via a seal 8, a metering member 12, the latter having mounted thereon a collecting ring 18. A collecting chamber 30 is mounted on the vessel 24 and sealed at its upper edge by a seal 23, a glass bowl defining a diffusion chamber 4 being clamped against the latter by a spring-loaded rod 59, Fig. 2. The metering member is provided with ports 16, Fig. 4, leading into grooves 17 communicating with the chamber 30 and with a port 16a and groove 17a communicating with the sampling vessel 24, via an aperture 9 and pipe 10. A discharge pipe 43 leads from the chamber 30 via a rotary valve member 50 to a discharge outlet pipe 47a. When the apparatus is used for sampling the milk the inlet pipe 1 is coupled to the milking apparatus connected to teat cups on the cow and the valve member rotated to bring a passage 57 therein into communication with the pipe 43 and the outlet pipe 47a. Suction then causes the milk to enter the diffusion chamber 4 where it flows over the member 18, through an aperture 21 and an annular space defined by surfaces 14a, 18a, and via, the ports 16 and grooves 17, into the chamber 30, the milk then being drawn through the pipe 47a. A small proportion of the milk flows through the port 16a and groove 17a, into the sampling chamber where it can be measured by means of a sight tube 33 and graduated scale 39. After the milking is finished the quantity of sample milk may either be drawn back into the main supply line by rotating the valve into a particular position or again, by rotating valve to another position, the sample may be drained out of the vessel for analysis. The valve is also provided with " off " and " flush " positions. In a modification, the ports and grooves may be replaced by an arrangement of pipes.
Patent GB-1466418-A (GB)
Title: Polymerised fatty acids and esters
IPC: C08F120/62
Filed: 1975-10-23
Abstract: 1466418 Polymerized fatty acids or esters VICTOR WOLF Ltd 23 Oct 1975 [25 Oct 1974] 46172/74 Heading C2C Conjugated trienoic fatty acids or esters, e.g. eleostearic, punicic and licanic acids are polymerized by contacting with an acid activated or neutral clay, at a temperature in the range 50‹ to 150‹ C. The trienoic compounds may be admixed with di- or monoenoic compounds. Examples describe the polymerization of tung and oiticica oil methyl esters.
Patent GB-1432769-A (GB)
Title: Thermosetting moulding compositions
IPC: C08L67/00
Filed: 1972-10-06
Abstract: 1432769 Unsaturated polyester compositions BP CHEMICALS INTERNATIONAL Ltd 21 Sept 1973 [6 Oct 1972 30 Nov 1972] 46287/72 and 55273/72 Heading C3P A curable composition comprises (1) an unsaturated polyester, (2) an unsaturated copolymerizable monomer, (3) a saturated liquid polyester with a melting point below 30 C. and (4) one or more cellulose esters. Component (1) is preferably derived from maleic or fumaric acid and alkylene glycols such as propylene glycol, and also bisphenol A adducts with ethylene- or propylene oxide. Specified examples of (2) are styrene, vinyl toluene and diallyl phthalate. Preferred components (3) are polypropylene adipate or -sebacate, and the cellulose ester may be, for example, cellulose acetate, propionate or butyrate or cellulose acetate butyrate. Other additives such as fibrous reinforcment and fillers may also be present.
Patent GB-1422514-A (GB)
Title: Dimethylbenzylureas
IPC: C07C239/00
Filed: 1974-10-28
Abstract: 1422514 Dimethyl benzylurea derivatives SHOWA DENKO KK 28 Oct 1974 [30 Oct 1973] 46436/74 Heading C2C Dimethyl benzylurea derivatives of the general formula in which R is an alkyl or alkenyl radical of at most 4 carbon atoms may be prepared by reacting compounds of the formula with a compound of formula RX in the presence of an acid acceptor in which X represents a halogen atom. The compounds have herbicidal properties. Compounds claimed per se are those in which R is methyl, ethyl, propyl, butyl, and allyl.