baber/WOPTO huggingface dataset:
Patent GB-1287620-A (GB)
Title: Frequency to direct current converter circuit
Inventor: ISAACS WAYNE R
IPC: G06G7/24
Filed: 1969-11-05
Abstract: 1287620 Frequency detectors BAUSCH & LOMB Inc 5 Nov 1968 [5 Nov 1968] 54326/69 Heading H3A Apparatus for producing a D.C. output signal having a magnitude that is a function of the frequency of a periodic input signal comprises a monostable circuit triggered by the input signal to produce pulses of a predetermined, adjustable, time duration, and means for detecting when the period of the input signal becomes less than the time duration of the pulses produced by the monostable. Before being applied to the monostable circuit, Fig. 3, the input signal is first converted to rectangular pulses which are differentiated by CR 80, 84 to provide a train of SET pulses for a bi-stable 36 which forms a part of the monostable. When set, the output of bi-stable 36 enables constant current source 38 to charge capacitor 118, 119, or 120 until the voltage across it is sufficient to pass a threshold set by 124, whereupon amplifier 122 provides a reset pulse for bi-stable 36. In the reset state, the output from bi-stable 36 switches transistor 136 on to discharge the capacitor. The time for which the bi-stable remains set is thus determined by variable resistor 117 and the switchable capacitors 118, 119, 120. The pulses produced are fed to an integrating circuit, Figs. 4A, 4B (not shown), which produces a first D.C. output (296) proportional to frequency, and a second output which is a logarithmic function of frequency. In order to detect when the period of the input signal becomes too short for the period of the monostable, the signal is delayed by units 300, 302, 304, Fig. 7, before being applied to the differentiator, and an output is taken from the first section to the trigger input of a JK flip-flop 306 and to the J input of JK flip-flop 308. The inverted output E 0  from the monostable is applied to the two flip-flops and, if the input signal period is greater than the monostable pulse width, the two flip-flops remain reset. When the input frequency is too high however further pulses from 300 occur at a time when the J and C terminals of both flip-flops are positive and they then become "set" to operate indicator 316.
Patent GB-1532049-A (GB)
Title: Dual tension single spring retractor
IPC: B60R22/44
Filed: 1976-12-30
Abstract: 1532049 Safety belt retractor AMERICAN SAFETY EQUIPMENT CORP 30 Dec 1976 [13 Oct 1976] 54384/76 Heading A3V In a safety belt retractor, gearing is provided between the biassing spring and the belt reel so that the full retraction force does not act on the wearer in normal use. The gearing arrangement is such that during normal protraction and retraction the gearing is locked and the biassing spring acts 1:1 on the belt reel. After protraction the first full turn of the belt reel on subsequent retraction is effected via the gearing, a reduced retraction force thus being obtained during this phase.
Patent GB-1297688-A (GB)
IPC: H04B3/38
Filed: 1970-11-19
Abstract: 1297688 Interconnection systems TOKYO SHIBAURA ELECTRIC CO Ltd 19 Nov 1970 [19 Nov 1969 29 June 1970] 55015/70 Headings H4K and H4R In an interconnection system two stations are directly connected by a two-wire line and use different transmission frequency bands in the two transmission directions to provide fourwire working. Various embodiments are described. Each includes a main station and one or more substations. The main station is alerted by depression of a push-button at a substation causing a tone to be generated at the main station speaker or receiver in a manner not detailed. The main station is provided wih a handset which when lifted switches the system from call waiting to calling state. Power is supplied from a local battery or rectified A.C. In one embodiment (Fig. 1, not shown), audio signals from the handset are modulated on a carrier frequency generated in the main station and the resultant frequency transmitted to the receiving station where they are demodulated and fed to the substation loud-speaker. Audio signals picked up by the substation microphone are amplified and transmitted in audio frequency form to the main station. The Figure shows an alternative embodiment comprising a main station 100 and two substations 200A and 200B. Signals picked up by the main station receiver 103 are amplified at 130 and transmitted in audio frequency form at a level sufficient to directly operate the substation loud-speaker 207. Signals picked up by a substation microphone 213 are amplified at 231, modulated on to a generated carrier at 232 and applied to the line pair 10, 20 via a filter 233. At the main station the received signal passes through a filter 133, is demodulated by detector 134 and is further amplified at 135 before application to the loud-speaker 104. Chokes 119 and 215 prevent transmitted signals being superimposed on the power supplies of the units 130, 133 to 135, 231 to 233 supplied from the main station battery 116. The oscillators in the units 232 operate at different frequencies in the two substations and the main station filter 133 passes both frequency bands. Two types of unit 232 using a single transistor and a frequency change switch are detailed. In a further embodiment (Fig. 6, not shown) carrier frequencies are used for both directions of transmission.
Patent GB-1314610-A (GB)
Title: Photographic apparatus
IPC: G03B7/08
Filed: 1970-11-19
Abstract: 1314610 Cameras and cassettes therefor POLAROID CORP 19 Nov 1970 [19 Nov 1969] 55098/70 Heading G2A The invention disclosed is similar to that of Specification 1314609 except that the temperatureresponsive impedance is replaced by a tape 60 of predetermined impedance fixed in a recess in the cassette wall. The resistance of the part of the tape between the contacts 62 and 64 on the spring member 66 is related to a sensitometric property of the film, e.g. speed. The value of the resistance can be varied by trimming its width. Its form may be modified, e.g. by having different discrete conductive and resistive paths, and by having these paths in wave patterns.
Patent GB-1532411-A (GB)
Title: Bouyancy regulation
IPC: B63C11/30
Filed: 1975-12-22
Abstract: 1532411 Fluid-pressure servomotor systems D G POPE 22 Dec 1975 [20 Dec 1974] 55272/74 Heading G3P [Also in Division B7] Apparatus for regulating buoyancy of a body immersed in a fluid comprises control means 26 Fig. 2 including a pressure transducer 28 and a two-way three position valve 30 which is operatively associated with the transducer 28 so that in one position gas is supplied from a tank 14 via a demand valve 18 to a variable volume chamber 36, in a second position the chamber 36 is connected to a vent 34, and in a third position the chamber 36 is not in communication with either the gas supply or the vent. The control means may comprise an air filled deformable capsule 50 Fig. 3 one wall of which is connected to a shaft 60 which extends through a sealed bearing 62 in the centre of a slider 54 and is connected to a linkage arranged so that movement of the wall 50b relative to the slider 54 causes an arm 66 to move into or out of contact with a trigger 70, movement of which admits gas into a space 80. Spring-loaded valves 52 are carried by and sent around ports 54a and the slider 54 is acted on by a spring 58. Ports 86 admit ambient fluid-pressure into the space surrounding the capsule 50. In use, an increase or decrease in ambient fluid-pressure causes the wall 50b of the capsule and the slider 54 to move relative to each other thus either causing operation of the trigger 70 to admit gas to the variable volume chamber via port 82 or causing the ports 54a to become uncovered thus allowing gas to escape from the chamber, gas being either admitted to or allowed to escape from the chamber until the control means returns to a null position, Fig. 3. The wall 50a of the capsule is secured to a stud 48 rotatably supported in an end cap which screw threadedly engages a casing 42 and which may be rotated to adjust the buoyancy of the apparatus. Alternatively, the deformable capsule 50 may be replaced by a neoprene block or a cylinder and piston arrangement, Figs. 7 and 8 (not shown) and the linkage, 60, 64, 66, trigger 70, and valves 52a may be replaced by a sliding valve arrangement involving either a tube (98) extending from the piston and in sliding engagement with a tubular extension of the slider (90), (Fig. 7) or a tube (118) extending from the piston and in sliding engagement with a spigot (124) (Fig. 8), appropriate ports and passages being provided in the tubes and spigot. The apparatus is intended for use by a subaquatic diver and may utilize the diver's breathing medium to supply gas to the variable displacement chamber and the chamber may comprise a resiliently deformable bag and be arranged to function as a life jacket.
Patent GB-1163606-A (GB)
Title: Improvements in or relating to a Method for refiring Ceramic Material and a Tunnel-Kiln for Carrying Out said Method
Inventor: HERMIT MAURICE GABRIEL
IPC: C04B33/32
Filed: 1966-12-19
Abstract: 1,163,606. Tunnel kilns. M. G. HERMET. 19 Dec., 1966 [20 Dec., 1965], No. 56736/66. Heading F4B. In a muffle heated tunnel furnace for rebaking ceramic ware, the combustion chambers 3, Fig. 1, are connected to flues 7 below the level of the ware carrying trucks through a number of dampered openings 8a-8b, Fig. 4, and the combustion chambers 3 and flues 7 are divided by dampers 10, 11 so that the flow of combustion products through the combustion chambers in counter current to the ware can be regulated to give a desired temperature curve along the firing chamber length. Since hot gases in the flues 7 do not deliver heat to the ware, by diverting the gases to the flues 7 a temperature "plateau" can be formed over a length of the firing zone. Some of the dampers 10 in the combustion chambers may be partly closed to give a controlled temperature rise over the appropriate length of the kiln.
Patent GB-1200315-A (GB)
Title: Electrical connection
IPC: H01R4/58
Filed: 1967-12-18
Abstract: 1,200,315. Direct connections. GREAT LAKES CARBON CORP. 18 Dec., 1967 [27 Dec., 1966], No. 57452/67. Heading H2E. [Also in Divisions C6-C7] Electrical connection is made between two conductors having different co-efficients of thermal expansion by fitting a portion of one conductor into a recess in the other with a clearance so chosen that when the temperature of the connection changes from the assembly temperature to a working temperature the two conductors are brought into sufficiently forceful contact to give a low-resistance connection, the clearance not being so small that stresses set up would lead to increase in resistance. As shown, the connection is made between a steel collector bar and the graphite cathode of an aluminium cell. The recess may extend along one surface from one side to another and may have a circular, rectangular or trapezoidal cross-section (Figs. 7a to 7d, not shown).
Patent GB-1308887-A (GB)
Title: Fastener
IPC: B25C1/18
Filed: 1971-12-10
Abstract: 1308887 Nails OMARK INDUSTRIES Inc 10 Dec 1971 [14 Dec 1970] 57473/71 Heading F2H  A nail to be driven into a laminate of fibrou (wood) and solid granular (concrete) materials by an explosively actuated tool comprises a shaft 30 with a head 26 at one end and a point 32 at the other, the point projecting beyond a shoulder 34 which crushes the fibrous material round the split made by the point 32 as the nail is driven through the fibrous material, to prevent the split extending. The diameter of the point base is half the shaft diameter at the shoulder.
Patent GB-1407309-A (GB)
Title: Ovens
IPC: A21B1/42
Filed: 1973-12-20
Abstract: 1407309 Ovens J F PAULUCCI 20 Dec 1973 [20 Dec 1972] 59050/73 Heading A2A An oven 10 comprises a cabinet 11 containing a support rack 12 including a helical rail 22 for supporting a circular article to be baked, in a radially outwardly overhanging relation thereon, the rail having a vertical axis; a baking heater 13 disposed in proximity to the rail; and a driven impeller 14 which serves to move a number of round trays 15 along the support rack. In operation a tray 15, carrying a food item to be baked is inserted through an upper door 19 onto the rack 12, the insertion being between a pair of legs 28. The next succeeding leg 28 rotates into engagement with the trailing edge of a tray 15 and nudges it along down the rail 22, along the length of the heater 13 to the exit or outlet door 20.
Patent GB-1487330-A (GB)
Title: Production of uniform copolymer of acrylonitrile and aromatic olefines
IPC: C08L33/20
Filed: 1973-12-20
Abstract: 1487330 Uniform acrylonitrile copolymer IMPERIAL CHEMICAL INDUSTRIES Ltd 10 Dec 1974 [20 Dec 1973 (2)] 59053/73 and 59054/73 Heading C3P A hydro(polyoxyethylene)ether of cellulose or polyvinylpyrrolidone of Fikentscher K value at least 60 is employed as suspension agent in the aqueous suspension polymerization of acrylonitrile and at least one olefin (see below) wherein a portion of the faster-reacting olefin is fed to the monomer mixture so as to produce a copolymer of uniform molecular weight. The olefin is defined as acenaphthylene, indene, coumarone or CH 2 =CRAr where R is H or CH 3  and Ar is a group having aromatic character (including substituted and unsubstituted phenyl, naphthyl, and groups derived from thiophene, phenanthrene, carbazole and pyridine). Additional monomers may be present with either comonomer. The examples relate to the copolymerization of acrylonitrile and styrene. A suitable rate for the addition of olefin monomer corresponds to the rate of production of heat which is measured by calorimetry or the desired rate may be determined from the result of periodic vapour phase chromatographic analysis.
Patent GB-1411170-A (GB)
Title: Process for the manufacture of benzylpyrimidines
IPC: C07D317/64
Filed: 1973-12-20
Abstract: 1411170 Benzyl-pyrimidines FHOFFMANNLA ROCHE & CO AG 20 Dec 1973 [21 Dec 1972] 59104/73 Heading C2C [Also in Division A5] Benzylpyrimidines of Formula I in which R 1 =H or C 1-7  alkyl, R 2 =H or C 1-7  alkoxy, R 3 =C 1-7  alkyl or C 1-7  alkoxy and R 4 =H or C 1-7  alkoxy or R 2  and R 3  together = methylenedioxy, are prepared by reacting a compound of Formula II in which R = C 1-7  alkyl, with an alkali metal alkoxide in an aprotic dipolar solvent (e.g. dimethylformamide, dimethyl sulphoxide or hexamethylphosphoramide) and an alkanol of formula ROH, and treating the resulting mixture with guanidine. Compounds I potentiate the antibacterial of sulpha drugs. Reference has been directed by the Comptroller to Specification 1,133,766.
Patent GB-1395873-A (GB)
Title: Method of producing chromium-containing alloys
IPC: C22C33/04
Filed: 1973-12-20
Abstract: 1395873 Refining Cr-containing alloys SANDVIK AB 20 Dec 1973 [29 Dec 1972] 59164/73 Heading C7D A melt of a Cr-containing alloy is refined in respect of its C and N contents by addition thereto of at least 1% of Al or an alloy thereof followed by removal of C and Al N and/or Al 2 O 3 . The melt may be of an alloy based on Fe or Ni and may contain Mo and/or Si, and the Al alloy may contain Si, Ba, Ca and/or Mg. It is preferred that the initial melt contain at least 1% C and that the melt temperature should be 1300-1500C. The melt may be formed in an induction furnace.
Patent GB-1243208-A (GB)
Title: Improved synthesis of arylchlorocarbonyl ketenes
IPC: C07D499/00
Filed: 1968-12-16
Abstract: 1,243,208. Synthesis of arylchlorocarbonyl ketenes. PFIZEK Inc. 16 Dec., 1968 [23 Oct., 1968], No. 59810/68. Heading C2C. A process for preparing arylchlorocarbonylketenes of the Formula I wherein R is a thienyl, furyl, pyridyl, phenyl or substituted phenyl radical wherein the substituent is a chlorine or bromine atom or a lower alkyl C 1-4  lower alkoxy C 1-4 , di (lower alkyl C 1-4)  amine or trifluoromethyl group comprises reacting an aryl malonic acid of the formula wherein R is as defined above with thionyl chloride in at least a 1:2 molar ratio in a reaction-inert solvent e.g. toluene, xylene, diglyine, CCl 4  at 70-80 C. and recovering the aryl chlorocarbonyl ketone. The aryl malonic acids wherein R represents a ¾,- m, d-methoxyphenyl,  o, m; p-trifiuoromethylphenyl, o-isopropylphenyl, 3-furyl, 3- or 4-pyridyl, o-butoxyphenyl, o, m, p-aimethylaminophenyl or o-diethylaminophehyl group are stated to be novel and are prepared by reacting an alkyl carbonate with the corresponding ethyl aryl acetate in the presence of sodium ethoxide and hydrolysing the ester thus formed. The methyl and phenyl esters of phenyl carboxy ketene are prepared by reacting a compound of Formula I with methanol or phenol in methylene chloride.
Patent GB-1330707-A (GB)
Title: Article handling apparatus
IPC: H01L21/67
Filed: 1970-12-18
Abstract: 1330707 Rotary conveyers INTERNATIONAL BUSINESS MACHINES CORP 18 Dec 1970 [31 Dec 1969] 60209/70 Heading B8A A rotating spider assembly 14 has eight arms each carrying a vacuum pencil pick-up head. A second spider assembly 16 is fixed rotationally but is reciprocable vertically. When the arms of the assembly 14 are stationary they are in vertical alignment with the arms of the assembly 16, and the latter is then lowered (by means, not shown) so that heads 96 carried by the arms, can engage members 106 on respectively aligned arms of the lower assembly. This results in the lower arms, which are so engaged, being flexed due to the construction of these arms being of spring steel 56, 58. The heads 96 are formed with a pattern of radially and circumferentially spaced projections which can be selectively positioned to align with spaced projections (128), (130) Fig. 5, (not shown) on the associated member 106 where these are also suitably and selectively positioned. By this means, the pencils 62 may be selectively depressed at any of eight stations (two only- 120 and 122-visible in Fig. 1) positioned below the respective arms of the upper assembly 16. In this way, semi-conductors are picked up from a supply station 120 and are carried round to six processing or testing stations. Each head 96 is retained in its selected position by a spring stop 118 which engages one of a series of notches in a peripheral rim of the head. Each pencil 62 is connected by a pipe 72 to a central manifold leading via an adjustment valve assembly to three inlet conduits 153, 155, 157. The supply to these conducits is controlled by a pneumatic logic unit 15. Pressure air for blow off, or steady state vacuum, is supplied by conduit 153, steady state vacuum is supplied by conduit 155, and interruptable vaccuum is supplied by conduit 157. The control manifold is formed by a stationary plate 40 formed with a series of circumferential channels (Fig. 4, not shown), a stationary plate 42 (Fig. 3, not shown) having a further series of circumferential channels, axially extending bores, and radially extending channels, and a plate formed by a flange 38 of the drive shaft 48 of the lower spider assembly. The plate 42 has two manually adjustable valves 200 (202) (Figs. 2 and 9, not shown) which enable the conduits 153, 155, and 157 to be connected up to the pencils 62 according to different selectable programmes of operation.
Patent GB-1350230-A (GB)
Title: Silver halide photographic light-sensitive material
IPC: G03C1/485
Filed: 1971-12-29
Abstract: 1350230 Direct positive silver halide emulsions FUJI PHOTO FILM CO Ltd 29 Dec 1971 [29 Dec 1970] 60468/71 Heading G2C A direct positive material comprises a lightsensitive silver halide emulsion layer including a Group VIII metal compound, e.g. a compound of Rh, Ru, Ir or Os, and a dye of the following formula which sensitizes the emulsion to the 5460-5770A wavelength region in which L<SP>1</SP>, L<SP>2</SP> and L<SP>3</SP> each represent optionally substituted methine; R and R<SP>1</SP> each represent optionally substituted alkyl; R<SP>2</SP> and R<SP>3</SP> each represent alkyl, aralkyl or allyl; X is an anion; n is 0 or 1; Z completes an optionally substituted benzene or napthalene ring; Z<SP>1</SP> completes an optionally substituted oxazole ring: and R and L<SP>1</SP> or R<SP>3</SP> and L<SP>1</SP> may be connected with each other through an alkylene chain. The sensitivity of the emulsion can be further increased by incorporating in the emulsion a salt of a tri- or tetravelent metal e.g. a salt of antimony, bismuth or arsenic.
Patent GB-643826-A (GB)
Abstract: 643,826. Ignition systems. LUCAS, Ltd., J. May 22, 1948, Nos. 13922 and 19612. [Class 7(iv)] [Also in Group XI] In a spark ingnition system for internalcombustion prime movers, comprising an induction coil a, b, a condenser e connected in parallel with a part of the coil, means for rectifying the charges supplied from the coil to the condenser and an igniting spark-gap or spark plug h connected in parallel with the condenser, a trigger spark-gap k is connected in series with the igniting spark-gap and the other part of the coil. The primary a of the coil is energized from any convenient source through make-and-break device c whilst the condenser e is connected through a rectifier either to the junctions of the primary and secondary winding a, b or, as indicated in dotted lines, to a point in the secondary winding b. As inductance i is placed in a circuit either in the position shown or at j, and a small condenser p may be connected across the ends of the induction coil if the inherant capacity of the coil and associated leads is insufficient. When the device c is in action the condenser e is progressively charged, by a succession of impulses, to a voltage less than the sparking voltage of the plug h; eventually a spark will occur at the gap k which will cause the voltage across the plug h to rise so that the plug gap will break down and allow the condenser e to discharge therethrough. In a modification, an inductance is joined between the spark plug and trigger gap whilst the use of the small condenser is necessary. In another modification, a thermionic valve rectifier is used, the anode of which is either connected to the junctions of the primary and secondary windings or through a condenser to an intermediate point of the secondary winding as well as to the storage condenser, by means of a resistance. In a further modification, when it is required to operate the systems from an alternating-current source the primary and secondary windings are separated electrically, and the primary winding is connected in series with an inductance or resistance when the two windings are closely coupled. The storage condenser is connected across an intermediate point and one end of the secondary winding through a full-wave rectifier.
Patent GB-662828-A (GB)
Abstract: 662,828. Ceramic compositions. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. Sept. 15, 1949 [Nov. 16, 1948], No. 23804/49. Class 22 A mixture of dolomite and titanium dioxide is heated to form a ceramic of a double titanate of calcium and magnesium. Lead oxide Pb 3 0 4  may be added as a flux, and the heating is effected at 1,300' C. The Specification states that if a mixture of the oxides or carbonates of calcium and magnesium is used instead of dolomite the double titanate is not formed and the ceramic comprises a mixture of crystals of the three constituent oxides.
Patent GB-2000771-A (GB)
Title: Alkyl tetrahydrofurfuryl ethers
IPC: C07D307/12
Filed: 1978-07-07
Abstract: The ethers are produced by reacting tetrahydrofurfuryl alcohol with an alkali hydroxide or alkaline earth oxide to produce an alkali or alkaline earth alkoxide salt, and reacting the alkoxide salt so produced with an alkyl halide, with the alkyl having 1-4 carbons, to produce the alkyl tetrahydrofurfuryl ether.
Patent GB-2034348-A (GB)
Title: Recovery of hydrocarbons from molten metal halides
IPC: C10G47/08
Filed: 1978-10-10
Abstract: In a process for hydrocracking heavy carbonaceous materials by contacting such carbonaceous materials with hydrogen in the presence of a molten metal halide catalyst to produce hydrocarbons having lower molecular weights and thereafter recovering the hydrocarbons so produced from the molten metal halide, a liquid low-boiling hydrocarbon stream is injected into the spent molten metal halide to aid in the recovery of heavy carbonaceous materials.