baber/WOPTO huggingface dataset:
Patent GB-595867-A (GB)
Title: Improvements in or relating to the preparation of disubstituted barbituric and thiobarbituric acid derivatives
Filed: 1944-05-12
Abstract: 5 : 5-Disubstituted barbituric and thiobarbituric acid derivatives of the formula <FORM:0595867/IV/1> where Y is either oxygen or sulphur and where R and R1 are alkyl or alkenyl groups, like or unlike and each containing not more than 6 carbon atoms, the sum of the carbon atoms in R and R1 not exceeding 10, are prepared by condensing an alkylthioethyl-alkyl disubstituted malonic or cyanoacetic acid ester with urea or thiourea in the presence of an alkali metal or alkalene earth metal alcoholate.  If desired, the compound so produced may be treated with a salt-forming compound to form a salt.  Compounds mentioned for this purpose include an alkali metal, a stoichiometric equivalent of an alkaline earth metal, ammonium, mono-alkyl ammonium, dialkyl ammonium, alkanol ammonium, or a stoichiometric equivalent of alkalene diammonium. The condensation is preferably conducted in the presence of an organic solvent.  When cyanoacetic esters are used as starting materials, these first yield iminobarbiturates which are then hydrolysed to the corresponding barbituric acids as described in Specification 587,519.  In examples: (1) b -n-butylthioethyl-ethyl malonic ester and urea are added to an alcoholic solution of sodium ethoxide, and the mixture refluxed to give 5-b -n-butylthioethyl-5-ethyl barbituric acid; (2) b -n-butyl-thioethyl-isopropyl malonic ester is condensed with urea as in example (1) to give 5 - b  - n - butylthioethyl - 5 - isopropyl bar bituric acid; (3) b -(1-methylbutyl)-thioethyl malonic ester is condensed with urea as in example (1) to give 5-b -(1-methylbutyl)-thioethyl-5-ethyl barbituric acid; (4) b -ethylthioethyl allyl malonic ester is condensed with urea as before to give 5-b -ethylthioethyl-5-allyl barbituric acid; (5) b -ethylthioethyl isoamyl malonic ester is condensed with thiourea as before to give 5-b -ethylthioethyl-5-isoamyl thiobarbituric acid; (6) b -n-butylthioethyl isopropyl malonic ester is condensed with thiourea as before to give 5-b -n-butylthioethyl-5-isopropyl thiobarbituric acid; (7) b -n-butylthioethyl allyl malonic ester is condensed with thiourea as before to give 5-b -butylthioethyl allyl thiobarbituric acid.  The sodium salts of the above-mentioned acids may be prepared by dissolving the acid in hot alcohol and adding a solution of sodium in hot alcohol.  The compounds of the present invention act as sedatives and hypnotics, which have a range of action from long to ultra-short. Other salts mentioned include the calcium salts and the ammonium, primary and secondary alkylamine, alkylolamine and alkylene diamine salts.  Disubstituted malonic esters used in the present process are prepared by condensing b -chloroethyl sulphides with sodio-monoalkylmalonic esters in an inert solvent.  Disubstituted cyanoacetic esters are prepared in a similar manner, starting from sodiomonoalkyl cyanacetic esters.
Patent GB-789876-A (GB)
Title: Improvements in methods of and apparatus for making gas discharge devices
IPC: H01J17/44
Filed: 1956-03-23
Abstract: 789,876. Cold-cathode tubes. WESTERN ELECTRIC CO., Inc. March 23, 1956 [March 24, 1955], No. 9130/56. Class 39(1). A method of adjusting the anode-tocathode spacing in a gas discharge tube comprises the steps of initiating a discharge to the cathode of the tube and bombarding the end of the anode with positive ions so as to etch away the said end until the anode-to-cathode spacing assumes a desired value. The tube, Fig. 2, comprises a molybdenum wire anode 12 mounted on a support wire 15 and directed along the axis of a helical wire cathode 11 mounted on a support wire 14. An auxiliary molybdenum wire anode 17 is mounted on a lead wire 18. A spot of radium 20 is provided on the inside of the glass envelope 10. The proportioning of the cathode, the anode-to-cathode gap and the gas pressure are preferably such that the tube has a stable negative resistance characteristic as described in Specification 686,427, which also discloses alternative forms of hollow cathodes which may be used. The cathode may be mounted on a bimetallic strip as described in Specification 789,875 so that changes in the breakdown voltage owing to changes in the gas density in the discharge gap following localized heating of the cathode by the discharge are automatically compensated by alteration of the anode-cathode spacing. The anode-cathode spacing is adjusted by connecting the tube in the basic circuit arrangement shown in Fig. 1. The gap 22 is purposely made too small when the tube is assembled, filled with gas and sealed off. A discharge is initiated between the ageing anode 17 and the cathode 11 by a voltage source 23, and a negative potential from a source 24 is applied to the main anode 12 which is bombarded by positive ions from the ageing discharge. Ballast resistances 26 limit the discharge current to the desired values which are indicated by meters 25. The specification describes an apparatus incorporating this basic circuit arrangement in which voltages to maintain the ageing discharge and ionically etch the main anode and a breakdown voltage are alternatively applied to the tube under control of a relay operated by a clock source so that the ageing discharge is periodically interrupted to allow the breakdown voltage to break down the main gap and is discontinued when the correct anode-cathode spacing has been reached. The tube is suitable for use as a switching element in the telephone switching networks described in Specification 704,108 [Group XXXIX]
Patent GB-1116894-A (GB)
Title: Glass melting furnace
IPC: C03B5/16
Filed: 1966-03-02
Abstract: <PICT:1116894/C1/1> A method of melting and refining glass making materials comprises feeding raw materials into a melting zone wherein they are heated to form a homogeneous mass of molten glass, flowing the molten glass through a throat of a bridge wall into a shallow fining zone and thereafter distributing the refined glass.  A suitable glass melting tank furnace 11 comprises a melting zone 13 into which is fed the raw batch, a refining zone 15 substantially shallow in depth compared with the melting zone, a bridge wall 17 having a plurality of throats 19 separating the melting zone from the refining zone and an open cooling zone 21 and distributer 27. The melting zone preferably increases in depth at 18 beneath the bridge wall.  The fining zone 15 has a width to depth ratio of at least 10:1. The bottom 29 of the cooling zone channel 21 drops to a lower level just prior to the distributer (or forehearth) take-off points. At the foot of this slope is a slot 31 through which stagnant glass can be drained off.  Scum or dross is floated off surface of the molten glass by an overflow 33 at the end of channel 21.  Each distributer is fed through submerged throats 37 in the sides of channel 21.  More than one channel 21 may be provided leading to a number of distributer channels (35) and more than one scum overflow 33 may be provided.
Patent GB-1096745-A (GB)
Title: Improvements in apparatus for and methods of opening tubular members
Inventor: HUMBERT JACQUES
IPC: B23D21/02
Filed: 1966-03-02
Abstract: 1,096,745. Dividing by a single blade. COMMISSARIAT A L'ENERGIE ATOMIQUE March 2, 1966 [March 2, 1965], No. 9214/66. Heading B3W. [Also in Divisions B4 and G6] An apparatus for longitudinally splitting a tube, in particular a nuclear reactor fuel can, comprises a chisel 2 which has a concave base and a cutter 6 which projects radially from the chisel and the cutting edge of which is in line with the chisel edge 10. Abutting the rear of the chisel is a deflector 20, the base of which is more concave than the base of the chisel 2, and which is thinner at its side edges than at the centre so that the deflector is crescent-shaped in transverse cross-section. The deflector is integral with an arm 22 and a shank 24 and the chisel 2 and cutter 6 are integral with a support 12 and a shank 14. The two parts of the tool are held in abutting relationship in a holder (18), Fig. 2 (not shown) Operation:- two cutter and deflector assemblies are positioned on opposite sides of the axis of a nuclear reactor fuel can to be cut and the can is moved against the cutters. The chisels 2 penetrate between the tube and the rod of fuel whilst the cutters 6 split the tube, the halves of the tube being bent away from the rod by the deflector 20. The strain thus exerted on the two portions of the tube tends to loosen the tube from the rod in front of the chisel and create a small space which allows the chisel to penetrate between the tube and the rod.
Patent GB-435561-A (GB)
Title: Radio transmission arrangement, more particularly for short or ultra-short wave purposes
IPC: H03C1/24
Filed: 1934-03-24
Abstract: 435,561. Valve generating and modulating circuits. RADIOAKT.-GES., D. S. LOEWE, 10, Wiesenweg, Steglitz, Berlin. March 24, 1934, No. 9250. Convention date, March 29, 1933. [Class 40 (v)] A frequency-doubling valve 1 has a fundamental wave from a source 9 applied in pushpull to two input grids 2, 3 of equal control on the electron stream, thus creating a wave of double frequency in the plate circuit, and modulating voltage is applied to an outer or screening grid 4. The input grids 2, 3 are connected to opposite ends of a circuit 8, 10 tuned to the frequency of the source 9 and connected through earth to the cathode at its mid-point. The input grids are biassed by a battery 11 so that only positive impulses affect the plate current. The output circuit 14 is tuned to double the frequency of the source 9 and may be coupled to an amplifier 26. Modulation voltage applied at terminals 17, 18 reaches the screen grid 4 through a choke 19 and condenser 20; and the positive voltage on the grid 4 is maintained by a.tapping on the potentiometer 23. A suppressor grid may be interposed between the grid 4 and anode 5 ; or if the circuit is operated so that the screen voltage never rises above the plate voltage, the suppressor grid may be omitted. The circuit is intended for use with short or ultra-short waves.
Patent GB-647597-A (GB)
Title: Telecommunication exchange
IPC: H04Q3/52
Filed: 1948-04-02
Abstract: 647,597. Automatic exchange systems. STANDARD TELEPHONES & CABLES, Ltd. April 2, 1948, No. 9309. Convention date, April 26, 1947. [Class 40 (iv)] An exchange system similar to that described in Specification 644,571 is supplied with electronically-controlled ringing. Incoming pulses from a calling subscriber connected to the distributer 1, seize a line-finder (top half of Fig. 2) which thereupon opens the gate 18 at the calling subscriber's time position to pass-pulses over wire 23 to the dial impulse circuit. Dial impulses received thereby set the register, Fig. 3, so that it produces pulses, which are applied to the input, output and ringing gates 18, 19 and 43, respectively, at the called subscriber's time position. Valves 36, 37 change over during the impulse train after which they restore, thereby changing over valves 39, 40 to close the dial gate 27 and open the ringing gate 43. The ringing signal is thereby transmitted from oscillator 45 to the called substation to actuate a cold cathode discharge relay therein to operate an audible or visual signal. When the called subscriber answers pulses so produced on wire 48 coincide with those derived from the register, thereby causing valve 49 to produce negative pulses to restore valves 39, 40 and cut off the ringing current. The resulting 'pulse from valve 40 changes over valves 52, 53, thereby biassing the output gate 19 so that it conducts on receiving pulses either from the register or the line-finder. Speech then passes in both directions between the anode of the distributer 1, input gate 18, storage filter 65, output gate 19 and the grid of the distributer 1. When the calling subscriber hangs up a pulse from the line-finder over wire 72 restores the register, the valves 52, 53 and if necessary valves 39, 40.
Patent GB-982290-A (GB)
Title: Improvements in or relating to apparatus for measuring the electrical conductivity of liquids
IPC: G01N27/07
Filed: 1960-03-16
Abstract: 982, 290. Determining physical qualities. WAYNE KERR LABORATORIES Ltd., R. CALVERT, and M. E. HOWELL. May 25, 1961 [March 16, 1960], No. 9313/60. Heading G1N. In an apparatus for measuring the electrical conductivity of a liquid wherein one electrode is movable so that the change in conductance can be measured when the electrode spacing has been changed by a known amount, the container and/or electrodes is/or are arranged so that the transverse cross-section of the path of the current through the liquid between the electrodes is constant over a substantial portion of the path, the cross-sectional area being bounded by the container over said portion. Plate electrode 14, Fig. 1, on a glass tube 10 which may be provided with inlet and outlet valves, is adjustable by a micrometer 16, and the method wherein the conductance change for a measured movement of electrode 14 is determined, serves to eliminate effects due to boundary conditions. In a modified arrangement, Fig. 2, one wire 52 of a pair of wire electrodes in a capilliary tube has a mixrometer adjustment attachment. An arrangement in which the movable electrode may have two alternative predetermined positions is also mentioned.
Patent GB-361789-A (GB)
Title: Improvements in and relating to motor-car bodies
IPC: B60P3/42
Filed: 1931-03-27
Abstract: 361,789. Road vehicles. BARBE, C. M. C. DE, Moor Tor, Marldon, Paignton, Devon. March 27, 1931, No. 9377. [Class 108 (i).] In a two-seater car having a rearward extension or boot for additional seats the boot is removable. and replaceable by a commercial body. The rearward extending seating part or boot 3 is secured by bolts 4, 6, 10 to a transverse bridging member 5 and to the chassis 1 and is positioned with the remainder of the body by clips 7. To mount a commercial body 8 the boot 3 is removed and an additional bridge member 9 is secured to the chassis members upon which bridge member and member 5 the body 8 is bolted, a spring support 11 being provided. The body may be in two. parts.
Patent GB-253281-A (GB)
Title: Improved electrical condenser with variable capacity, for use mainly in wireless apparatus
Filed: 1925-04-09
Abstract: 253,281. Eagland, F. April 9, 1925. Condensers comprise plates of two strips A of foil of rectangular, taper, or other form supported by a broader band B of flexible dielectric material the ends of which are attached to metal rollers C controlled by springs R. The bands A, B are of suitable length to allow a number of turns to be wound on each roller, the bands A being in contact therewith at one end and at the other secured in a slot D in a spindle E in which the centre of the band B is secured. The spindle E is supported in a bush K which is secured by a nut L and extended to pass through a panel to which it is secured by a nut N. Rotation of the knob P causes the bands A to be wound on the spindle E and increase the capacity, the springs R withdrawing the bands on reverse rotation of the knob. A friction-plate S opposes the pull of the springs R. A Geneva stop-work is used to indicate the setting and comprises a star wheel T carrying a dial V observable through a window W in the knob, the wheel being engaged by a finger U secured on the panel by the nut N. Specification 6987/12 is referred to.
Patent GB-950025-A (GB)
Title: Method and device for automatically switching off a stranding machine, more particularly a high-speed stranding machine for the production of electric cables
IPC: D07B7/08
Filed: 1962-03-12
Abstract: 950,025. Stranding machines. J. KRAFT, J. KRAFT, and A. KRAFT, [trading as J. A. KRAFT [firm of]]. March 12, 1962 [April 7, 1961], No. 9476/62. Heading D1T. A method of switching off a stranding machine in the event of wire failure comprises continually sensing the number of wires in the outer layer of the stranded cable or rope, and switching off the machine when the number of wires thus determined falls below the prescribed number of wires. In Fig. 4, a holding circuit for a switch relay S of a stranding machine is energized via two switches z and k arranged in parallel. The switch z is closed momentarily by a counter Z each time the counter Z has received a number of pulses equal to the correct number of wires in the outer lay, and the switch k is opened momentarily each time the stranding head has performed one revolution. During normal operation this sequence of switch opening and closing is so phased that the circuit to the relay S is always closed If, however, a wire is absent from the outer layer the counter Z receives one pulse less for each revolution of the stranded cable with the result that the said sequence is no longer in correct phase sequence. The circuit to the relay S is thus momentarily broken when both switches are opened simultaneously and the stranding machine stops. In Fig. 2 the outer wires 2 of a cable are contacted by a feeler tip 18 on a pivoted lever 19 carrying an electric contact pin 23. The lever 19 is pivoted on a lever 15 biased by a spring means (not shown in Fig. 2) towards the cable 1, the lever 19 carrying an electrical contact 24. The lever 19 is biased away from the lever 15 by a resilient yielding pad of sponge rubber 22 but the contacts 23, 24 are so set that each time the feeler tip 18 passes over a wire 2 the contacts 23, 24 are caused to close. Closure of the contacts 23, 24 sends one pulse to the counter Z. The method may also be effected by comparing the number of wires in the outer layer of the rope or cable within a lay length with the number of wires of the next lay length, and if the latter is below the former, by the stranding machine being switched off. Instead of a mechanically operated sensor device, a capacitive or inductive sensor device may be used which on the passage of a wire gap or a wire of the cable, produces current pulses of different strengths for operating the counter. , Instead of by means of the mechanical repetition counter Z, the absence of a wire may also be determined by transmitting the feeler pulse to a relay or counter with a definite, adjustable basic comparison value (for example 6) or to an electronic counter or the like, and the machine brought to a stop when the particular counter does not reach the basic value.
Patent GB-718455-A (GB)
Title: Improvements in or relating to heteropolymeric resin compositions
IPC: C08G75/22
Filed: 1952-04-16
Abstract: A composition comprises a polysulphone resin and an organic sulphonamide of formula <FORM:0718455/IV (a)/1> where R1 is an organic hydro-carbon radical and R2 and R3 are hydrogen, or aliphatic or aromatic hydrocarbon radicals.  The sulphonamide has a molecular weight between 120 and 1,000, a boiling point above 250 DEG F., at least one aliphatic group, no aliphatic group of more than six carbon atoms and is present in from 1 to 150 parts to 100 of resin. Specified are o-, p-, N-ethyl-o-, N-ethyl-p-, N-p-tolyl-p- and N, N-dipropyl-p-toluenesulphonamides; N-ethyl-, N, N-diethyl, N, N-dimethyl and N-ethyl-N-methyl pentanesulphonamides and N, N-diethyl benzenesulphonamide.  The polysulphone resins may be derived from styrene, butadiene, isoprene, cyclohexadiene, acetylenes, vinyl acetate, allyl alcohol, allyl ethyl ether, o-allylanisole, o-allyl phenol, p-bromo-allyl benzene, methyl undecylenate, undecylenyl alcohol, undecylenic acid and mixtures. The compositions may be prepared by mixing an aqueous emulsion of the resin, pH desirably from 3 to 8, with an aqueous dispersion of the sulphonamide, preferably as a continuous process.  The emulsifier for the plasticizer dispersion may be selected from long chain alkyl sulphates and sulphonates, aryl and alkaryl sulphonates, fatty acid soaps, rosin acid soaps, condensation products of an alkyl phenol and ethylene oxide, heptadecylamine-epichlorhydrin and dodecylamine hydrochloride. The latex may be used as such or coagulated to give a plasticized resin.
Patent GB-747406-A (GB)
Title: Phonograph pickups
IPC: H04R17/08
Filed: 1953-04-08
Abstract: 747,406. Gramophone pick-ups. TECHNICAL CERAMICS, Ltd. April 8, 1953 [April 10, 1952], No. 9537/53. Class 40 (4). [Also in Group XXXVIII] In a stylus arm and mounting (see Group XXXVIII) for a gramophone pick-up having two styli for alternative use, a piezo-electric element 32 is mounted between elastomer pads 33 in a casing 35 consisting of two mouldings riveted together by hollow rivets 41. An extension 61 from the element 32 has a V-uotch 63/1 to engage the stylus arm 16., Rigid terminal members 51 are provided with a relatively flexible spring-like tail portion 54 folded in the way indicated in Fig. 3 between the element 32 and the elastomer pads 33 and thereby pressed into electrical contact. The casing 35 is supported on the pick-up arm 11 by means of brackets 44 and pillars 47.
Patent GB-1214682-A (GB)
Title: Circuits comprising current limiting devices
IPC: H01H87/00
Filed: 1968-02-28
Abstract: 1,214,682. Protective systems. MITSUBISHI DENKI K.K. 28 Feb., 1968 [28 Feb., 1967], No. 9650/68. Heading H2K. [Also in Division H1] A current limiting circuit comprises a device 2 consisting of a quantity of current limiting material enclosed in a casing, and a switch 3 connected in parallel with the device. The current limiting material is such that when it is heated by a predetermined current passing through it some of the material evaporates in which state it has a high resistivity. The material is an alkali metal. The switch 3 short circuits the device 2 to allow the full rated current to be passed without current limiting occurring. When the circuit is to be broken the switch 3 is opened causing the current to flow through the device 2, the current limiting material is vaporized and its resistance increases reducing the current to a low value. The residual current may be broken by a switch 4 connected in series with the circuit. A resistor 6 may be connected across the device to suppress voltage transients produced when the material evaporates. The circuit may be used in a short-circuit protection system by arranging for the parallel switch to be opened on overload. The load current is re-established after a " no-voltage " time by re-closing the parallel and series switches provided that the recovery time of the device is less than the " no-voltage " time. If the recovery time is too long, a plurality of circuits may be connected in series and controlled so that each device in turn is used to break the current after a short " no-voltage " time, the arrangement being such that the first device recovers before it is required for re-use, Fig. 2 (not shown).
Patent GB-657760-A (GB)
Title: Improvements in or relating to electric signalling systems
Inventor: RIDLER DESMOND SYDNEY
IPC: H04Q3/42
Filed: 1948-04-07
Abstract: 657,760. Pulse generating circuits. STANDARD TELEPHONES & CABLES, Ltd. April 7, 1948, No. 9737. [Class 40 (vi)] [Also in Group XL (b)] In a telegraph exchange register (see Group XL (b)) a time-base circuit comprises two phantastron arrangements V1, V2 coupled together so as to produce a self-sustained output. A negative start potential on the start terminal TT4 reduces the anode potential of the valve V1 which after a delay of 10 ms. produces a negative pulse of ¢ ms. duration on the screen grid, which is applied to the anode of the second phantastron valve V2. This therefore produces a similar output pulse on its screen grid after 10 ms., which in turn triggers the anode of the first valve V1. The two outputs are also shaped and amplified in valves V7 and V8, respectively, and two pulse series, one delayed by 10 ms. with respect to the other, are taken from the cathode-follower leads TT1, TT2. A positive stop potential applied to the stop terminal TT5 so biasses a diode V6 that no further pulses can pass from V2 to VI and the generator therefore stops.