baber/WOPTO huggingface dataset:
Patent GB-1410475-A (GB)
Title: Equalizers
IPC: H04B3/06
Filed: 1972-11-15
Abstract: 1410475 Adaptive transversal equalizers WESTERN ELECTRIC CO Inc 15 Nov 1972 [17 Nov 1971] 52727/72 Heading H4R In an adaptive transversal equalizer, Fig. 8, particularly for a phase modulated data transmission system two sets of multipliers 72A to 72E and 73A to 73E are provided connected to the tapping points 71A to 71E of the equalizer delay device and the outputs of one set of multipliers 72 is combined in quadrature with the output of the other set of multipliers 73 in adding device 87 to provide the equalizer output. Phase angle changes between successive samples of the equalized signal are determined and stored in the shift register 80, and from the stored values phase changes between non- adjacent samples are determined, e.g. by adders 81A to 81E, and converted to Sine and Cosine values of phase difference which values are correlated, in correlators 74A to 74E and 75A to 75E, with an error signal representing the deviation of the actual phase change between adjacent samples relative the nominal phase change between adjacent samples, to provide incrementing adjustment values for the multipliers 72A to 72E and 73A to 73E . As described the data transmission is by eight-phase modulation in which three serial bits are taken at a time and encoded as phase changes of odd multiples of 22¢ degrees of a 1,800 Hz carrier. The output from the equalizer is modulated to a higher frequency, e.g. 16À2 kHz, to provide more zero crossings and fed to an IF transition detector 39 Fig. 5, which, on the IF zero crossing nearest the centre of the data sampling period as determined by clock 40, provides read out and reset of counter 32. Counter 32 has m = 9 stages and is fed via gate 31 with the output of an oscillator 30 of frequency 2<m> x the IF frequency, i.e. 2<9> Î 16À2 kHz = 8À2944 MHz. The arrangement is such that the count read out from the counter is a measure of the phase change between adjacent data intervals, the three most significant digits providing a binary read out of the phase change, and the transmitted data, while the next most significant digit gives the error sign and the following most significant digits the error magnitude, of the equalizer output. As described only the error sign is used to feed to correlatorsin the equalizer, Fig. 8, although the error magnitude could be used to adjust the size of the multiplier adjustment steps. The binary numbers representing the nominal phase changes between adjacent taps are fed into the shift register 80 to allow calculation, by binary addition, of the nominal phase change between the reference tap and the remaining taps, to feed to the sine-cosine converters, logic circuits for which are described with respect to Figs. 9 and 10 (not shown), the outputs from which feed the respective correlators 74, 75. The actual output of the equalizer is converted to Gray code by a logic circuit 41, 42, Fig. 5 from the binary angle read out.
Patent GB-1459804-A (GB)
Title: Method for paper feeding and device therefor
IPC: G01N15/00
Filed: 1973-11-14
Abstract: 1459804 Feeding sheets AGENCY OF INDUSTRIAL SCIENCE & TECHNOLOGY 14 Nov 1973 [15 Nov 1972] 52898/73 Heading B8R Sheets are separated from the top of a pile 6 in a heated magazine 2 by a vertically movable suction device 5, and double feed is prevented by blowing air from orifices 13 in a ring-shaped tubular member 12 horizontally or slightly downwardly against the edges of the sheets. The pile is urged upwardly by a spring 11. After the device 5 has raised a sheet, it is rotated by an arm 7 mounted on a shaft 8 to bring the sheet to a position above a plate 14, lowered on to the plate and the suction released by a solenoid valve 15. The pile may rest on a slightly inclined support plate.
Patent GB-1453157-A (GB)
Title: Polyurethane adhesive composition with minimal moisture sensi tivity
IPC: C08G18/10
Filed: 1974-12-09
Abstract: 1453157 Adhesive polyurethanes GENERAL TIRE & RUBBER CO 9 Dec 1974 [11 March 1974] 53208/74 Heading C3R  An adhesive polyurethane composition is prepared by blending (A) a liquid isocyanateterminated polyurethane prepolymer containing 5 to 30% by weight free isocyanate groups and (B) a liquid curative mixture comprising an organic polyhydroxy compound and a urethane catalyst, the ratio of the total active hydrogen atoms in (B) to isocyanate groups in (A) being from 1À1 : 1 to 1À9 : 1 and the ratio of the calculated branching coefficient (defined) to the critical branching coefficient of the total system being at least 1À4 : 1, where the critical branching coefficient is the reciprocal of f-1 and where f is the average functionality of the reacting molecules in (A) and (B) having a functionality higher than 2. Prepolymer (A) is suitably the reaction product of a polypropylene ether glycol and an aromatic diisocyanate. Component (B) may comprise a polyether or polyester polyol optionally in admixture with polyamines, aminoalcohols and/or low molecular weight polyhydroxy compounds. Tin compounds and/or tertiary amines may be used as the urethane catalyst.
Patent GB-1491455-A (GB)
Title: Apparatus for producing high voltage pulses by capacitor discharge
IPC: H05G1/24
Filed: 1974-12-10
Abstract: 1491455 Supply circuits for X-ray tubes; converting WEGO CONDENSER CO Ltd 8 March 1976 [10 Dec 1974] 53428/74 Headings H2H and H2F A supply circuit for an X-ray tube comprises capacitors C 1 -C N , a voltage step up transformer TR2, a switching device COM which discharges the capacitors sequentially through the transformer primary winding TR2P to induce a high alternating voltage in the secondary winding TR2S and rectifiers D 3 , D 4  for rectifying the high alternating voltage. When relay operated isolators ISOL 1 , ISOL 2  and switches SW 1 -SW N  are closed, the capacitors C 1 -C N  are each charged slowly to a voltage of 5 kV. A relay operated safety SW 2  is then closed by a control circuit CCT which also triggers a triac Tri. Rotor arms RA 1 , RA 2  in the device COM are rotated by a motor to sequentially discharge the capacitors C 1 -C N  through the primary winding TR2P to produce alternate positive and negative pulses in the winding, the pulse frequency being 200 Hz. The 65 kV peak voltage produced by the transformer secondary winding TR2S is rectified by the diodes D 3 , D 4 , smoothed by capacitors CS 1 , CS 2  and supplied to the X-ray tube. The triac may be replaced by a pair of thyristors or a gas filled tube. In a modification, Fig. 4 (not shown), the switches SW 1 -SW N  are replaced by thyristors which are triggered in sequence by the outputs of a shift register and the circuit supplies voltages in the range 92 to 130 kV or 65 to 92 kV.
Patent GB-1453597-A (GB)
Title: Temperature monitoring equipment
IPC: G01K3/10
Filed: 1973-11-22
Abstract: 1453597 Measuring temperature electrically WORMALD INTERNATIONAL Ltd 22 Nov 1973 [1 Dec 1972] 54240/73 Heading G1N [Also in Division G4] A temperature monitoring equipment comprises a thermistor or semi-conductor diode temperature sensitive element yielding a linear voltage vs temperature characteristic, an analogue-digital converter 1 sampling the voltage and providing a binary coded output to memory A subsequently the voltage is sampled again and the resultant output is transferred to memory B. An arithmetic unit subtracts the content of memory A from memory B and the result Y is passed to comparator 4 receiving a reference or pre-programmed input code Z representing a rate of rise of temperature which must not be exceeded if an alarm is not to be given. If Y is greater than Z a counter 5 is stepped on one until after ten successive samplings with Y greater than Z an output stage 7 is triggered. The existing temperature may be compared with a reference value represented by X in a comparator 6. Thus an alarm may be triggered by either excessive temperature or excessive rate of rise of temperature.
Patent GB-1106520-A (GB)
Title: Improvements in or relating to anchor stations
IPC: E21F13/10
Filed: 1966-12-06
Abstract: 1,106,520. Mine conveyers. GEWERKSCHAFT EISENHUTTE WESTFALIA. 6 Dec., 1966 [9 Dec., 1965], No. 54557/66. Heading B8A. [Also in Division E1] An anchor station positioned in the roadway of a mine is advanced by means of two parallel beams 1, 2 disposed one above the other and each guided by the frame 10 of the anchor station for movement relative thereto in the longwall and roadway directions respectively. The beam 2 with skids 8 is normally braced against the longwall side roadway face 3, but for advancement of the anchor station the beam 1 with skids 9 is extended in the longwall direction to engage the roadway face 3 and thereby release the beam 2 for advancement in the roadway direction. The beam 1 is then retracted and the beam 2 re-engages the roadway face 3 whereby the anchor station may then be advanced. The movement of the beams is achieved by hydraulic rams 5, 5<SP>1</SP> and 6 suitably mounted on the frame 10. The frame 10 is mounted on skids 11, 12 the skid 11 having means 13 to receive pit props 14 which are only utilized in special cases e.g. for the replacement of conveyer channels.
Patent GB-1424468-A (GB)
Title: Lawn mowers articularly supported on a tractor
IPC: A01D75/30
Filed: 1973-11-26
Abstract: 1424468 Gang mower JACOBSEN MFG CO 26 Nov 1973 [8 Jan 1973] 54802/73 Heading A1F A gang mower includes mower support arms which are pivoted to allow transfer between the road and working positions. All of the arms have horizontal pivot pins to allow vertical movement whilst two of the arms each additionally have a vertical pivot pin 39 (nearer to the tractor than its horizontal pivot pin 38) to allow respective arm sections 36 to be pivoted about a fore and aft axis such that during transport the sections 36 overlie the respective horizontal sections of the arms which support rear mowers 21, 22. All pivoting is effected by a hydraulic system, Figs. 2, 4 (not shown) having interlocked valves to provide the correct sequence of pivoting.
Patent GB-1134639-A (GB)
Title: Method for making electron discharge devices
IPC: H01J9/04
Filed: 1965-12-28
Abstract: 1,134,639. Electrode processing. SYLVANIA ELECTRIC PRODUCTS Inc. 28 Dec., 1965 [31 Dec., 1964], No. 54906/65. Heading H1D. In the manufacture of a discharge tube, in which an electrode is resistively heated by the passage of current therethrough to degas it, a magnetic field is applied during the heating, to increase the temperature attained by the electrode by reducing the ionization of gas adjacent the electrode and hence the shunting of the electrode current through the gas. Each of the electrode coils (8, Fig. 1, not shown) of a fluorescent lamp is coated with a mixture of alkaline earth carbonates, whereafter the envelope is flushed with inert gas, evacuated to a pressure within the range 0À1 to 10 torr, and resistively heated by the application of a voltage across its lead wires while a magnetic field is applied, to reduce the carbonate coating and degas the electrode. The magnetic field is preferably directed at an angle of 45 degrees to the axis of the electrode. In-phase alternating electrode voltage and magnetic field may be employed; field strengths in the range 500 to 2,500 gauss are referred to.
Patent GB-1203156-A (GB)
Title: A logarithmic encoder
Inventor: SCHINDLER HANS RUDOLF
IPC: H04J3/00
Filed: 1968-11-20
Abstract: 1,203,156. A/D converters. GENERAL ELECTRIC CO. 20 Nov., 1968 [12 Dec., 1967], No. 55170/68. Heading G4H. A logarithmic encoder includes an exponentially decaying reference source of opposite polarity to the unknown analogue signal to be encoded and a diode 30 (Fig. 1) producing a pulse at a time when the magnitude of the reference signal and the analogue signal are substantially the same, the time interval from the commencement of the decay of the reference signal to equality being measured. In the embodiment described a plurality of analogue inputs 12 are multiplexed on to one line by transistor or diode bridge switches. The logarithmic encoder includes two circuits 14, 13 for positive and negative inputs respectively. For each measurement a diode bridge switch 39 is closed by sequential control 10 to allow a capacitor 37 to charge, in the case of circuit 14, to a predetermined negative potential, the switch then being opened to allow the capacitor to discharge and a gate 21 being simultaneously operated to allow clock pulses from an oscillator 20 to be accumulated in a binary counter 22. At equality tunnel diode 30 changes state and closes gate 21 by applying a pulse to the base of one of a transistor pair (61, 62, Fig. 4, not shown) to switch a tunnel diode (60), initially switched to its active state by the control 10, to its passive state. The contents of seven bit counter 22 are transferred to a buffer storage register and a polarity bit is derived in logic circuitry 17 in dependence on which the circuit 13, 14 delivers a parallel coded output signal, the eight bit signal being serially transmitted. The apparatus is suitable for encoding speech signals. Calibration is effected by using one of the inputs 12 for a reference signal 28, preferably of zero volts, a capacitor (85) in a comparator 23 being charged during the time interval between the pulse from diode 30 and a delayed pulse from sequential control 10. If the peak current of tunnel diode 30 drifts this time interval is lengthened and via the comparator 23 the charge on a capacitor (95) in hold circuit 26 becomes more negative and generates a reduced bias for the diode 30. This calibration process is repeated in each measurement cycle.
Patent GB-1302309-A (GB)
IPC: B41J21/04
Filed: 1971-12-01
Abstract: 1302309 Selective printing INTERNATIONAL BUSINESS MACHINES CORP 1 Dec 1971 [28 Dec 1970] 55706/71 Heading B6F Tabulating.-Rotation of a lead screw 1 under the control of an escapement mechanism (not illustrated) determines the position of a carrier 16. The carrier is urged in the letter spacing direction by a wound up spring 27 acting via a pulley system. A tabulating mechanism 50 is connected via gears 59, 60 to the shaft 52 on which the spring 27 is mounted. The mechanism 50 has as many settable pins 54 as character spaces in a line. The set pins 54 operate an electric switch (72, Fig. 2) when the carrier 16 reaches the tab positions on successive depression of the tab key. The lead screw 1 carries a number of spokes 8, 9 which are detected by a sensing device 10. The spokes 9 cause pulses to be transmitted via leads 12 to a counter (not illustrated). The spoke 8 causes pulses to be transmitted via leads 11, which pulses indicate the home position. During tabulation, after the switch 72 has been tripped to indicate the approach of a tabulation position, means (not illustrated) are provided for causing an electromagnet 5 to be deactivated thereby stopping the rotation of the lead screw 1 with pawl 3, when the spoke 8 is next sensed by the sensing device 10. The pins 54 are set with a lever 34 via linkages and cleared by an axially movable plate 61.
Patent GB-1171756-A (GB)
Title: Improvements relating to a Method of Manufacturing Ceramic Bodies having Positive Temperature Coefficients of Resistivity.
IPC: H01C7/02
Filed: 1966-12-16
Abstract: 1,171,756. Semi-conductive resistors. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 16 Dec., 1966 [18 Dec., 1965], No. 56451/66. Heading H1K. [Also in Division C1] A ceramic body having a positive temperature coefficient of resistivity and containing substantially pure semi-conductive barium titanate which has been made semi-conductive by means of the "principle of controlled valency" is manufactured by intimately mixing the barium titanate with at least one of the fluorides of calcium, strontium or barium, shaping the mixture to form a compressed body, and sintering the body in an oxygen-containing atmosphere. The fluoride content of the mixture corresponds to a fluorine content of from 0À005 to 0À1 gm. atoms per gm mol. of barium titanate. The "principle of controlled valency" relates to inorganic solids of a more or less polar type (e.g. oxides) in which a condition for electronic conductivity is that the lattice contains ions derived from the same element but of different valency in the same crystallographic position, and according to the principle this state is promoted by the incorporation into the lattice of foreign ions of such a charge that they balance the charge of the ions of deviating valency. In the present invention the barium titanate is rendered semi-conductive by the addition of one or more of the elements antimony, bismuth, niobium, cerium, yttrium and lanthanum. The barium titanate may be prepared by intimately mixing barium carbonate, titanium dioxide and antimony trioxide powders in molar proportions of 1:1À0175: 0À0015, heating the mixture in air at 1100‹ C. for 60 minutes, and grinding the resulting product prior to the addition of the fluoride. The body contains at least 93 mol. per cent of barium titanate and preferably up to 3 mol. per cent of titanium dioxide in excess of stoichiometric proportions. Small proportions of the barium may be replaced by strontium and small proportions of the titanium may be replaced by tin.
Patent GB-1368680-A (GB)
Title: Adriamycin derivatives
IPC: C07H15/252
Filed: 1972-12-09
Abstract: 1368680 Adriamycin derivatives SOC FARMACEUTICI ITALIA 9 Dec 1972 56916/72 Headings C2A and C2C Novel compounds I in which R is an acyl radical derived from a substituted or unsubstituted, aliphatic, aromatic, cycloaliphatic, araliphatic or heterocyclic mono- or di-carboxylic acid having from 1-20 C or a therapeutically acceptable salt thereof (but not acetic acid) any substituent being halo, OH, alkyl, alkoxy, unsubstituted or mono- or di-alkylamino or NO 2  or R is an acyl radical derived from an alkyl- or aryl-carbonic or carbamic or alkylcarbamic or sulphonic acid are prepared by reaction of 14-bromodaunomycin or a salt thereof with RO-M (M is an alkali or alkaline earth metal or quaternary ammonium radical).
Patent GB-1215473-A (GB)
Title: Lawn mower blade and a method of manufacture thereof
IPC: A01D34/73
Filed: 1967-12-15
Abstract: 1,215,473. Mowers. DAYCO CORP. 15 Dec., 1967 [24 March, 1967], No. 57007/67. Heading A1F. [Also in Division B5] A mower blade has the cutting edge made of a non-reinforced flexible urethane elastomeric material. Portions of the blade 27, 29 or, alternatively, the whole end of the blade containing the cutting edge, may be made of such material. The other parts of the blade are made from a more rigid material, e.g. plastics or a flexible elastomer. A laminated end portion of the blade is also described.
Patent GB-1449516-A (GB)
Title: Motor driven rammers
IPC: E02D3/046
Filed: 1973-12-10
Abstract: 1449516 Ramming devices for compacting WACKER WERKE KG 10 Dec 1973 [27 Dec 1972] 57068/73 Heading B4C A rammer for compacting soil, &c. comprises a rammer foot 1, Fig. 2, connected to a top mass 2 by means of a motor-driven crank assembly 3 and rubber supporting members 4 which are arranged on opposed sides of the top mass and which in operation are subjected to shear stress. One or two such rubber members 4 may be provided on each of the sides and given an initial stress by screws 4a. The rammer is operated by lifting or pressing down a handle fitted to the top mass to effect forward or rearward movement at a desired speed. In the Fig. 6 embodiment, the rubber members are each formed of a rubber tube 24 inserted between angle sections 25 which are attached to the top mass 2 and a bracket 7 of the foot respectively.
Patent GB-1380244-A (GB)
Title: Thienobenzazepines and processes for their preparation
IPC: C07D495/04
Filed: 1972-03-01
Abstract: 1380244 Thieno[3,2-b][f][4H]benzazepine ROUSSEL-UCLAF 1 March 1972 [1 March 1971] 57677/73 Divided out of 1380243 Heading C2C Novel thieno[3,2-b][f][4H]benzazepines of the general formula wherein each of R<SP>1</SP> and R<SP>2</SP>, which may be at any available position on the benzene nucleus, is a hydrogen or halogen atom or a trifluoromethyl, optionally substituted alkoxy, alkylthio, alkyl, optionally substituted sulphamoyl, dialkylamino or acylamino group; R 1  which may be at the 2- or 3-position, is a hydrogen atom or alkyl group; X<SP>2</SP> is a hydrogen atom; Y<SP>3</SP> is a hydrogen atom or hydroxyl group; and Z<SP>3</SP> is a hydrogen atom; or X<SP>2</SP> and Y<SP>3</SP> together form an additional C-C bond between the atoms to which they are attached; or Y<SP>3</SP> and Z<SP>3</SP> together form the oxygen atom of a ketonic function, are prepared (a) when Y<SP>3</SP> and Z<SP>3</SP> together form the oxygen atom of a ketonic function, by acid hydrolysis of the corresponding compound in which each of Y<SP>3</SP> and Z<SP>3</SP> is an alkoxy or alkylthio group or Y<SP>3</SP> and Z<SP>3</SP> together form an alkylenedioxy, alkylenedithio or alkylenethiooxy group; (b) when Y<SP>3</SP> is a hydroxyl group, by reduction of the product of (a); (c) when X<SP>2</SP> and Y<SP>3</SP> together form an additional C-C bond, by heating the product of (b) in the presence of a metal oxide; and (d) when Y<SP>3</SP> is a hydrogen atom, by treatment of the product of (a) with a powerful reducing agent.
Patent GB-1151618-A (GB)
Title: Lubricating Apparatus
IPC: H02N13/00
Filed: 1967-12-21
Abstract: 1,151,618. Bearings. NATIONAL CASH REGISTER CO. 21 Dec., 1967 [23 Dec., 1966], No. 58084/67. Heading F2A. [Also in Division H1] In apparatus for lubricating the periphery of a rotatable cylindrical member 14, a transfer member such as a lubricant stick or block 50 is mounted in a holder 52 and is urged by means of a spring 56 into contact with said periphery. The holder 52 is mounted on a rod 58 and is reciprocated by means of a reversely-threaded shaft 60, so that, when the member 14 rotates, a trace of lubricant in the form of a helix is deposited around the periphery of the member 14. The latter is provided with a layer 30 of highly polished dielectric material of high resistivity which has a coefficient of expansion similar to the metal of the member 14 and along with a metal band 32 forms an electrostatic actuator 12. The member 14 is mounted on a shaft 16 which is carried by supports 24, 28; is provided with a collar 26; and may have a gear 70 mounted thereon. The latter may mesh with a gear 68 mounted on the shaft 60. The shafts 58 and 60 are also carried by the supports 24, 28 and are provided with insulator bushings 59, 59 and 62, 64 respectively. The member 14 has an electrical potential of one polarity applied thereto via a brush 38 on the shaft 16 and the metal band 32 has a potential of opposite polarity applied thereto via a contact 40 so-as to create the desired attractive electrostatic force which causes the band 32 to be rotated with the member 14. An end 42 of the band 32, having a block 48 secured thereto, may be used to actuate a lever 44 which is connected to the block 48 and to a support 46. When the potential is released from the band 32, the latter is released from the rotating drum and the band is returned by means of a spring 36. The coating 30 may be barium titanate and the stick 50 may be a mixture of P.T.F.E. and molybdenum disulphide.