baber/WOPTO huggingface dataset:
Patent GB-1044514-A (GB)
Title: Improvements relating to direct current control arrangements
Inventor: SHAND GEORGE
IPC: H02P7/29
Filed: 1962-06-01
Abstract: 1,044,514. Automatic current control. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. May 28, 1963 [June 1, 1962], No. 21243/62. Heading G3R. [Also in Divisions H1 and H2] A direct-current load, such as a traction motor having armature 1A and field winding IF, is connected in series with inductor 2. A device 3 responds at a high level of motor current to disconnect the motor from a D.C. supply and to connect it in a discharge circuit until the current decreases to a low level, whereupon a device 4 reconnects the motor to the supply. As shown, triggering pulses for a silicon controlled rectifier 12 in series with the motor are supplied from the device 4, whilst the discharge circuit comprises diode 13. When the rectifier 12 is rendered conductive, a rectifier 14 is blocked, capacitor 18 being charged through resistor 15. Consequent upon the increase of motor current to the level at which the device 3 responds, rectifier 14 is rendered conductive to discharge the capacitor and to block the rectifier 12. The capacitor 18 is then recharged in the reverse sense until the armature current decreases and causes the device 4 to trigger the rectifier 12. An additional controlled rectifier 16 and resistor 17 may be connected across resistor 15, the rectifiers 12, 16 being triggered simultaneously. This affords stable operation of the rectifier 12 when it is initially rendered conductive. The devices 3, 4, may comprise rings 21, 22 of magnetic material associated with currentcarrying conductor 20. With regard to the device 3, the magnetizing force produced by the motor current is opposed by those due to control current winding 23 and bias current winding 24. Current pulses from generator 19 are supplied to winding 25 to provide a magnetizing force which adds to that due to the motor current. Triggering pulses for the rectifier 14 are derived from the winding 26. The device 4 similarly comprises bias winding 28 whose magnetic force aids that due to the motor current whilst windings 27, 29 act in an opposing sense. Triggering pulses for the rectifiers 12, 16, are derived from the winding 30. The current in windings 23, 27, is zero when the motor is started, the flux in core 21 being varied during each pulse from generator 19 to produce triggering pulses in winding 26. The winding 30 produces no triggering pulses. If the biasing current is now increased, pulses are no longer transmitted to the rectifier 14, and further increase causes rectifiers 12, 16 to become effective to connect the motor to the supply. The build up of motor current then blocks the rectifiers 12, 16, and finally renders the rectifier 14 conductive. The current-responsive means 3, 4 may be replaced by a Hall plate device.
Patent GB-532679-A (GB)
Title: Improvements in and relating to yarn winding machines
IPC: B65H63/036
Filed: 1939-07-22
Abstract: 532,679. Winding yarns. HOLT, Ltd., T., and BRIERLEY, E. July 22, 1939, No. 21354. [Class 120 (ii)] In a drum winding machine in which the upward movement of the bobbin cradle is resisted by a brake or drag device applied to the pivot shaft of the cradle, the brake or drag releasing means incorporates a trip mechanism operable on breakage or failure of the yarn supply or when the yarn package has reached a predetermined diameter ; the brake or drag device may consist of a brake drum fixed to the pivot shaft carrying the cradle and wrapped by a chain or the like, one end of which is fixed to the machine frame and the other end being connected to a weighted lever which tightens the chain on the drum in one direction only of rotation of the drum. As shown, the bobbin cradle 10 is fixed on a shaft 12 carrying the brake drum 15 which is wrapped by a chain 16 having the end 16a fixed to the frame 14 and the end 17a connected to the short arm of a lever 17b fulcrummed on a shaft 18 with its longer arm articulated about midway of its length to a pendant link 20 carrying an adjustable weight 21, which tightens the chain on the drum. The drum carries a cam piece 29 disposed adjacent the adjustable end 26 of a rod 24 slidably mounted in guides 22, 23 adjacent the lever 17b with an adjustable stop member 25 at its other end ; a spring 27 on the rod normally retains the latter with the stop member 25 against the guide 23. The trip mechanism comprises a feeler 34 pivoted on a stud 36 and normally supported by the yam and a latch 37 also pivoted on the stud 36; a brake wedge 30, fulcrummed on a pin 31 and connected by a link 32 with the usual weighted lever 33 is released when the latch 37 is tripped by the falling of the feeler when the yarn breaks or fails and moves between the package B and the drum C, lifting the package out of contact with the drum and stopping its rotation. A peg 38 on the wedge also engages the lever 17b and presses it upwards to relieve the pressure of the chain 16 on the brake drum. The cam piece 29 is adjustable around the brake drum and when the package attains a predetermined diameter, the cam piece engages the end 26 of the rod 24 and forces the rod outwards so that a peg 39 thereon trips the latch 37 to bring the stop motion into action. The upward movement of the brake wedge 30 is limited by a stop 40 and the cradle may then be lifted by the handle 41 and retained in its raised position by an arm 42 pivoted to the cradle and carrying an approximately rectangular block 44 slidable in the narrow part of a slot 45 in a fixed plate 46, and capable of being turned when in the under part 451 of the slot so that it is prevented from entering the narrow part ; alternatively a notched lever having a spring-influenced connection with the setting-on handle may be arranged to engage a stop on the shaft 18 when the cradle is in its raised position and the lever or the block 44 may be released by the initial movement of the cradle when it is lowered by the handle 41 to recommence winding.
Patent GB-184194-A (GB)
Title: Improvements in and relating to circuit breakers
IPC: H03K17/54
Filed: 1922-08-04
Abstract: 184,194. British Thomson - Houston Co., Ltd., (Assignees of Hull, A. W.). Aug. 4, 1921, [Convention date]. Sparking, preventing; contact arrangements for high-potential circuits. In parallel with a switch is arranged an electron discharge device at first adjusted to conduct current in shunt to the switch, opening the shunted switch and then altering the adjustment of the electron discharge device so as to reduce the flow of current therethrough to zero, whereupon the main circuitbreaker may be opened. As shown in Fig. 2, applied to a direct-current circuit, the discharge device consists of a highly-evacuated tube 10 containing a heated filament cathode 9 and a surrounding cylindrical anode 8, the tube being surrounded by a coil to produce longitudinal magnetization. The device is connected up in shunt to the switch 7<1> and, to break the circuit sparklessly at the circuit breaker 17, the switch 18 is first closed to heat the cathode by means of the battery 12, thereby shunting the main current through the device and allowing the switch 7<1> to be opened, then closing the magnetizing circuit at the switch 16, whereby the path of the electrons between the electrodes is deflected and the conductivity of the discharge device reduced to zero. In this condition, the main circuit-breaker 17 may be opened spiritlessly. In the application to alternating currents, two discharge devices reversely connected are employed. The arrangement may be modified to act automatically on overload, the correct switching sequence to open the circuit, sparklessly, as described above, being provided by a series of contactor switches in the main circuit.
Patent GB-970031-A (GB)
Title: Polymerization of aldehydes
IPC: C08G2/00
Filed: 1963-05-29
Abstract: A saturated aliphatic aldehyde containing one to eight carbon atoms is polymerized using a complex of an alkali metal or alkaline earth metal with an organic compound having at least one conjugated double bond linkage in the absence of oxygen, carbon dioxide, water and alcohols.  Specified aldehydes are formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, isobutyraldehyde, valeraldehyde, isovaleraldehyde, hexenal, methoxybutyraldehyde, ethoxybutyraldehyde, chloroacetaldehyde and chloral. Specified organic compounds are naphthalene, anthracene, naphthacene, styrene, diphenylethylene, benzophenone, azobenzene, arsenobenzene, phosphenobenzene, butadiene, isoprene, pyridine, vimyl pyridine, 2-methyl-5-ethyl-pyridine, picoline, butadine, collidine, quinoline, quinoxaline, acridine, pyrimidine, naphthylidine, thiophene, vinyl thiophene furan and aryl furan. Solvents e.g. tetrahydrofuran, diethyl ether, dimethoxyethane, dioxane and toluene may be present.  The product may be acylated or etherified.  The metal complex may also be reacted with an unsaturated monomeric compound e.g. styrene, acrylic esters, methacrylic esters, vinyl esters, vinylpyridene, and butadiene and then purified anhydrous aldehyde charged into this solution to give a block polymer of the aldehyde with the polymer of the unsaturated monomeric compound.  Examples are given of the production of block copolymers of polyoxy methylene and polystyrene, of the block copolymer of styrene and acetaldehyde, and of the block copolymers of acetaldehyde with methyl vinyl-pyridine, with alpha-methyl styrene, with methyl methacrylate, with isoprene and with butadiene.
Patent GB-769447-A (GB)
Title: Improvements in or relating to diagnostic x-ray apparatus
IPC: A61B6/00
Filed: 1954-07-22
Abstract: 769,447. X-ray apparatus. PHILIPS ELECTRICAL INDUSTRIES, Ltd. July 22, 1954 [July 23, 1953], No. 21424/54. Class 98(1) A diagnostic X-ray apparatus comprises a counterbalanced carriage sliding on a vertical column carried by a trolley and supporting a ring which can rotate about a horizontal axis through its centre and an external vertical axis, said ring supporting a concentric rotatable inner ring which latter is provided with two guide sleeves each carrying a slidable arm for supporting the. X-ray tube and viewing means (including image amplifier) respectively, there being a controlling mechanism so that the axes of the X-ray tube and viewing means remain in alignment and directed through a fixed point when the supporting arms are displaced. In the apparatus shown, the column 2 (Fig. 1) supports the slidable carriage 7 which causes a supporting plate 11 rotatable about the vertical axis 10. The plate 11 includes arcuate arms 37 extending on either side of the carriage and passing tnrough the head 38 on the carriage, which head is provided with locking means 39. The outer ring 13, which is supported on the plate 11 for rotation about horizontal axis 12-12a, carries the concentric inner ring 14, which can be rotated by handwheel 24. The inner ring carries guide sleeves 15, 16 in which the arms 17, 18 slide (see also Fig. 8). Arm 18 carries X-ray tube 20 and arm 19 carries the viewing means 19. When the arms 17, 18 are displaced, the common axis of the X-ray tube and viewing means is kept in alignment and passing through the point 22a by means of the parallel linkwork shown in Fig. 8. The arms may be displaced by turning wheel 67 which rotates the yoke 61 about a journal on the outrigger 40. Specification 769,444 is referred to.
Patent GB-614531-A (GB)
Title: Improvements relating to vehicle electric lamps
IPC: F21V17/00
Filed: 1946-07-19
Abstract: 614,531. Vehicle lamp mountings. LUCAS, Ltd., J. and NEILL, R. L. July 19, 1946, No. 21626. [Class 75 (iii)] A vehicle lamp unit comprising a reflector a, Fig. 1, electric bulb holder b, and glass front d, is supported by a carrier ring e, having a flange e<1> formed with key-hole or equivalent slots f, Fig. 2, for engaging headed supporting screws m. The latter carry springs n and are secured in sockets I on the flange g<1> of a parabolic mounting g permanently secured to the vehicle. The optical axis of the lamp is set by appropriate adjustment of the screws m. An annular bezel p encloses the flanges e<1>, g<1>, and also an annular dust shield r of rubber or other flexible material. Specification 567,084 is referred to.
Patent GB-505355-A (GB)
Title: Improvements in or relating to cathode ray deflection
IPC: E01F9/506
Filed: 1937-08-06
Abstract: 505,355. Cathode-ray tubes. RADIOAKT.-GES. D. S. LOEWE. Aug. 6, 1937, No. 21716. Convention date, Aug. 12, 1936. [Classes 39 (i) and 40 (iii)] To maintain sharpness of the image point when the ray is deflected widely a correcting voltage of parabolic wave form is applied to one 13 of two electrodes 5, 13 forming a. lens for focusing the beam on the screen; the voltage is obtained from the saw-tooth, deflecting voltages by integrating condensers 11, 11<1> connected to the deflecting plates 3, 3<1> through resistances 10, 10<1>. The electrode 13 receives a steady bias from the potentiometer 17. The correcting voltage supplied from the potentiometer 18 may be. amplified and the voltage to be integrated may be taken off a winding 14a on the relaxation oscillation generator 14 for the deflecting voltage. With electromagnetic focusing the correcting voltage is supplied to the focusing coil.
Patent GB-945308-A (GB)
Title: Improvements relating to the degasification of pulverised fuel
Inventor: SCHUSTER ERNST
IPC: C10B49/08
Filed: 1960-06-21
Abstract: <PICT:0945308/C3/1> <PICT:0945308/C3/2> In a process for the oxidizing pretreatment of pulverized caking fuel, prior to its degasification, in suspension, an oxidizing agent, e.g. air, and a carrier gas including a combustible gas, e.g. coal gas, are supplied separately to the bottom of an oxidation chamber 1 and partially burnt and the pulverized fuel is introduced at, or close to, the zone where the partial combustion of the carrier gas is substantially completed. The fuel is heated before introduction.  The carrier gas and oxidizing agent are heated to close the ignition temperature before being introduced tangentially into the chamber 1, and the fuel is injected centrally into the eddy of both so produced.  The chamber 1 has a cylindrical portion 3, a nozzle tube 5 introducing fuel extending through the base 13 thereof and ducts 4, 14 introducing carrier gas and oxidizing agent, respectively.  A degasifying chamber 2 is directly above the chamber 1, which in a modified form has no lining.
Patent GB-790460-A (GB)
Title: Improvements in or relating to semi-automatic telephone exchanges
IPC: H04Q3/00
Filed: 1956-07-13
Abstract: 790,460. Exchange systems. TELEFONAKTIEBOLAGET L.M. ERICSSON. July 13, 1956 [July 29, 1955], No. 21760/56. Class 40 (4). At a tandem exchange having manual boards equipped with cord circuits, when the calling and called lines are both 4-wire lines the talking circuit is transferred automatically to a path including primary and secondary cross-bar switches and the cord circuit serves only to provide supervision. When a 2-wire line L1, Fig. 1, calls, relay AR1 lights the calling lamp CL1. When the operator plugs into jack M1, cut-off relay UR1 pulls up, disconnects AR1 and lamp CL1 and cuts out the line termination B1. The line L1 is called in response to battery on the a wire which operates ringing relay RR1. When a call is received over a 4-wire line L2, Fig. 2, which is provided with amplifying equipment F and a hybrid trans- 'former D2, relay R6 energizes over wire c1 and lights lamp CL2. Relay R7 operates when the operator plugs into jack M2 and disconnects R6 and lamp CL2. The line L2 is called by means of relay R8 which connects battery to wire c2. At the manual board OPP, Fig. 3, after the operator has inserted the answering plug AP she throws her speaking key K, thus operating relay PR3. If the call is from a 4- wire line relay OR1 energizes over the c wire in series with R3, R4 which remain inoperative at present. If the calling plug BP is also inserted in the jack of a 4-wire line relay OR2 energizes over a similar circuit and connects up a position relay OPR1 which prevents the operation of any other position relay and cuts out the high resistance windings of OR1, OR2. In consequence, relays R3, R4 energize in the calling line equipment connecting wire d2 to wire m11 whilst in the called line equipment, on account of resistance r3, only R3 energizes, connecting wire d2 to wire m12. Wires d2 lead to selecting magnets in primary cross-bar switches while wires m11, m12 lead to relays in a common marker which controls the interconnection of the calling and called lines over primary and secondary cross-bar switches, Figs. 4, 5 (not shown), in the manner indicated in Fig. 6. Cut-off relay R5 energizes in each line circuit in series with the operating magnets disconnecting R3, and connecting R1 to the c wire so that it pulls up when the speaking key K is restored and completes the connection. The operator may also interconnect the two lines by connecting battery to the b wire from her set OPC to operate R2. A clearing signal operates R6 which connects up FR1 or PR2 to light lamp PLB or PLA.
Patent GB-698184-A (GB)
Title: Hygienic protective packages for dressings and the like
IPC: B65D75/42
Filed: 1950-09-05
Abstract: 698,184. Packages; wrappers. WERMAN, J. Sept 5, 1950 [Sept. 10, 1949], No. 21838/50. Classes 94(i) and 94 (ii) [Also in Group VI] A hygienic protective package for dressings and the like comprises an envelope or sheath having on at least one of its surfaces, a plurality of spaced adhesive flaps which, after cutting off a desired length of the dressing together with the envelope or sheath, may be moistened and turned down to re-seal the package. An envelope or sheath 1 enclosing a bandage or dressing 2 has a plurality of transverse gummed sealing flaps 3 spaced equidistantly along one surface thereof. Instead of being affixed to -the enevelope 1 the flaps may be formed as transverse gummed folds in one surface of the envelope, Fig. 7. The envelope may comprise two strips secured along their longitudinal edges around the bandage. The wrapped bandage may be rolled up and put in a box.
Patent GB-788121-A (GB)
Title: An improved process for the preparation of piperazine
Inventor: PEAK DOUGLAS ARCHIBALD
IPC: C07D295/027
Filed: 1955-07-28
Abstract: Piperazine is prepared by a process comprising heating a salt of b -hydroxyethylethylene diamine and a hydrohalic acid at a temperature in the range 200-270 DEG  C.  The salts which may be used are monohydrohalides, dihydrohalides or mixtures of these and may be prepared in situ.  The reaction is preferably carried out in an atmosphere of nitrogen.  The piperazine may be separated by making the resultant mixture alkaline and fractionally distilling it. Alternatively it may be separated by forming a double salt between an ammonium halide and a piperazine dihydrohalide, of formula 2HX.C4H10N2.NH4X.H2O (X is a halogen atom), treating this with excess of aqueous alkali and distilling the product.  In the examples: (a) hydrochloric acid is added to b -hydroxyethylethylene diamine under reflux; the resulting mixture is heated at 220-230 DEG  C.; ammonium chloride is added and piperazine dihydrochloride-ammonium chloride is separated; piperazine is obtained by dissolving the double salt in caustic soda solution, adding alcohol and fractionally distilling the alcoholic solution of piperazine; (b) hydrochloric acid, followed by ammonium chloride, is added to b -hydroxyethylethylenediamine and the salt obtained is heated at 220-240 DEG  C.; piperazine is separated as in (a); and (c) ammonium chloride is added to b -hydroxyethylethylene diamine and the resulting salt is heated at 220-240 DEG  C.; the double salt of piperazine dihydrochloride and ammonium chloride is obtained and piperazine is liberated as in (a).
Patent GB-1464795-A (GB)
Title: Process for treating liquid wastes
IPC: G21F9/12
Filed: 1974-05-16
Abstract: 1464795 Treating liquid effluents from nuclear fuel microsphere production AGIP NUCLEARE SpA 16 May 1974 [17 May 1973] 21900/74 Heading C1A A process for the treatment of liquid effluents produced during the production of nuclear fuel (e.g. ammonium uranate) microspheres which effluents include ammonium nitrate, tetrahydrofurfuryl alcohol and a methylcellulose, comprises: (a) separating the nitrate ions on a strongly basic anion exchange resin to replace nitrate ions by hydroxyl, (b) distilling off ammonia from the effluents, (c) absorbing the distilled ammonia in washing water, which has been used to wash the microspheres, and (d) concentrating the methylcellulose and tetrahydrofurfuryl alcohol. The distillation of ammonia may be carried out before or after treatment with the anion exchange resin. The methylcellulose and tetrahydrofurfuryl alcohol may be concentrated by distillation of the water, and may be first separated on a suitable resin, e.g. a Sephadex (Registered Trade Mark) resin. This resin and the anion exchange resin may be used together in a mixed bed.
Patent GB-703790-A (GB)
Title: Improvements in or relating to electric relay devices
Inventor: KENDON SIDNEY PETER
IPC: H01H83/20
Filed: 1951-09-18
Abstract: 703,790. Load-shedding arrangements. VENNER. Ltd., [Formerly VENNER TIME SWITCHES, Ltd.]. Sept. 17, 1952 [Sept. 18, 1951], No. 21928/51. Class 38 (4) A consumption circuit is supplied through automatic switchgear adapted to allow unrestricted load on the circuit during conditions of normal supply system voltage but which disconnects the circuit from the supply system if the circuit loading exceeds a predetermined value during a period of reduced supply system voltage. In the arrangement shown in Fig. 13, the consumption circuit is connected between terminals 51, 96 supplied from mains terminals 33, 51 a resettable electromagnetic switch having contacts 34, 35 and operating coil 4 and the bimetal strip of an overload switch having contacts 86, 87, 89, 94. Switch coil 4 is connected across the mains in series 'both with the contacts 86, 87 and a further contact pair 62, 63 which are controlled by an eddy-current disc 8 having a shaded pole field system energized from the mains by a voltage coil 7 and a return spring 66 which opposes the torque produced by the field system and tends to tender the disc in a direction to close the contacts 62, 63. Under normal voltage conditions the torque due to the field system maintains contacts 62, 63 open so that, although the value of the load current. may be much more than sufficient to close the thermally operated contacts 86, 87, switch coil 4 is not energized and no limitation is imposed on the current in the load circuit. However, upon a predetermined reduction of mains voltage, spring 66 causes contacts 62, 63 to close, so that coil 4 is energized and effects disconnection of the load circuit of contacts 34, 35 if, or when, the load current is sufficient to close the thermal contacts 86, 87. These contacts, which latch but, may be reclosed, manually, and will remain closed if the circuit loading has been reduced to a value insufficient to close contacts 86, 87. Contacts 89, 94 provide a protective shunt path on the bimetal strip at high values of load current. The thermal switch may be provided with ambient temperature compensation. Its contact 86 is adjustable relatively to contact 87 to provide for load adjustment. Snap-action of the voltagecontrolled contacts 62; 63 may be provided by a stud 107 of magnetic material arranged on the disc 8 so as to move in the vicinity of the usual brake magnet 106. The yoke of the electromagnetic switch may provide the return path for the flux of the field system energized by coil 7. Specification 703,663 is referred to.