baber/WOPTO huggingface dataset:
Patent GB-1186363-A (GB)
Title: Thyristor Circuits
Inventor: ADAMS DEREK STANLEY
IPC: H02M1/06
Filed: 1966-06-24
Abstract: 1,186,363. Controlled rectifier switching circuits. JOSEPH LUCAS (INDUSTRIES) Ltd. 12 June, 1967 [24 June, 1966], No. 28402/66. Heading H3T. [Also in Division H2] In a thyristor circuit, Fig. 1, a thyristor 14 has its cathode connected to the negative terminal 12 of a D.C. source 13 and its anode connected to the positive terminal 11 through an inductor 15 and load 16 in series, and a capacitor 18 is connected in series with a switch 17 across thyristor 14, the arrangement being such that in a cycle of operation, firstly capacitor 18 charges through inductor 15 and load 16 to a voltage in excess of that of the D.C. source 13, then thyristor 14 is triggered to feed load 16, the charge on capacitor 18 is reversed (by triggering thyristor 21 into conduction) and finally this reversed charge on capacitor 18 is used to reverse bias thyristor 14 to cut it off (by triggering thyristor 17 into conduction). Should load 16 be inductive, such as a motor, a diode 22 is provided to limit the back e.m.f. generated when thyristor 14 is cut-off. The mean load current may be adjusted by variation of the firing time of thyristor 14. The thyristors of the circuit shown in Fig. 1 may be controlled by the circuit shown in Fig. 2, comprising a free running multivibrator T1, T2, controlling unijunction transistors U1, U2. Transformer secondaries 32, 34 and 35 are used to control thyristors 17, 14 and 21 respectively. When transistor T1, conducts, the consequent reduction in potential between the bases of unijunction U1 permits the discharge of capacitor Cl through the unijunction and transformer 31, thus triggering thyristor 17. When, subsequently, the multivibrator switches so that T1 cuts off and T2 conducts, capacitor C2 discharges through unijunction U2 and transformer 33, thus triggering thyristors 14 and 21 simultaneously.
Patent GB-1292520-A (GB)
Title: New guanidinium salts and their use as optical brightening agents
Inventor: HORSTMANN WALTER
IPC: C07D231/12
Filed: 1970-06-11
Abstract: 1292520 Guanidinium salts of sulphonic acids BAYER AG 11 June 1970 [11 June 1969] 28430/70 Heading C2C [Also in Division D1] Novel guanidinium salts of sulphonic acids have the general formula wherein X is an optionally substituted 1,3,5- triazine, 1,2,3-, 1,2,4- or 1,2,5-triazole, 1,2,5- naphtho - (2,5) - triazole, 1,3,5 - triazinylamino, pyrazole, acylamino or urea radical; Y is a hydrogen or chlorine atom or a cyano group or X; Z is a hydrogen atom or a sulphonic acid group; R 1  is an amino group, a hydrogen atom or an optionally substituted alkyl or carbocyclic radical; R 2  to R 5  are hydrogen atoms or optionally substituted alkyl or carbocyclic radicals, or R 2  together with R 3  or R 4  together with R 5  denote an alkylene radical linked to the N-atom ; and m is the number of - SO 3 - groups in the stilbene molecule. The novel compounds are prepared by reacting a salt of each of the components in a molar ratio of at least 1 : 1, preferably in an aqueous or organic medium at 20 to 120 C. The compounds may be used as optical brightening agents.
Patent GB-285542-A (GB)
Title: Improvements in and relating to temporary connectors for stranded flectric conductors
IPC: H01R4/20
Filed: 1926-11-12
Abstract: 285,542. British Insulated Cables, Ltd., and Falconer, T. H. Nov. 12,1926. Sleeve couplings.-The ends 2, Fig. 4, of stranded electric cables are joined by insertion in a sleeve 4 which is thereafter indented at 6 by a tool which forces the indentations into the interstices of the strand. The sleeve 4 may be slit longitudinally either at the ends or the whole way so as to facilitate entry of the ends 2, or may be formed in two parts each more than a semi-circle in cross section. A suitable indenting tool is shown in Fig. 5. The cable and sleeve are held between dies 7<1>, 8<1> on the end of levers 7, 8 held together by an eccentric device 20, and then levers 12, 13 pivoted on the same pivot 9 as the levers 7, 8 are forced together, so that their coned ends 12a, 13a pass through apertures 7<a>, 8<a> in the dies and form the indentations in the sleeve.
Patent GB-271740-A (GB)
Title: Process of distilling solid carbonaceous material
IPC: C10B49/02
Filed: 1926-11-12
Abstract: 271,740. Trumble, M. J. Nov. 12, 1926. Coking processes.-Coal, peat, shale, or the like are distilled by the passage of superheated steam which enters a group of retorts such as 10, 11 by a pipe 12 the steam and distillates passing by a pipe 18 to a dephlegmator 19, heavy condensible oils, tars or pitches being removed by a pipe 20 and the steam and vapour passing through a superheater 22 before entering a further group of retorts 23, 24 and a dephlegmatur 37 and superheater leading to another group of retorts and so on. The steam and vapours are heated to about 1200‹ F. in the superheaters. The vapours leaving the last set of retorts are condensed, the fixed gases recovered for power purposes and the residue from the retorts used as fuel.
Patent GB-839363-A (GB)
Title: Improvements in or relating to electronic valve amplifiers
Inventor: CLARK THOMAS GORDON
IPC: H03F3/44
Filed: 1955-10-06
Abstract: 839,363. Signal combining circuits. DECCA RECORD CO. Ltd. Sept. 24, 1956 [Oct. 6, 1955], No. 28569/55. Class 40 (4). [Also in Group XL (c)] In a cascode amplifier the overall gain is increased by using as the grounded-cathode input stage a number of valves 11-13, Fig. 1, with anodes and cathodes connected in parallel. Pentodes may be used instead of triodes, as in a modification (Fig. 2), used for combining signals, such as pulses. In this the signals to be mixed may be applied to any of the grids or even to the cathodes of a number of nominally " grounded cathode " valves 23-25, or to the grid of the nominally " grounded grid " stage 20. A particular signal may also be applied to one or more grids of the valves 23-25 in parallel, so as to increase the gain for this signal.
Patent GB-173880-A (GB)
Title: Improved press for affixing rubber or other suitable sealing material to the lids oftins and the like
IPC: B21D51/46
Filed: 1920-10-11
Abstract: 173,880. Middelthon, C. Oct. 11, 1920. Lids, making.-A press for affixing rubber or other sealing-material to lids of tins &c. comprises a heating-element underneath which a continuously rotating table passes the dies carrying the lids. A heater 1, Figs. 1 and 2, is adjustably fixed by an arm 1<a> to a vertical pillar 1<b> and supports a bearing 2b for a spindle 2<a> carrying a rotating disc 2, which presses down the opening- tongues of the lids. The lids are carried by dies 6 on a rotating table 8. To increase progressively the pressure on the dies 6 and to guide them beneath the heater 1, the front edge of the heater comprises a hinged flap 3, 3a. The rear edge may have a similar flap or be inclined as at 5. In a modification, the heater comprises a rotating drum 30, Fig. 4, mounted on a shaft 29 carried by ball bearings adjustably supported by nuts on two vertical screw-threaded rods 25, 26. The table is rotated from a pulley 13 through a foot-controlled clutch 14 and bevel-gearing 23, 24, a roller 22 on the pulley-shaft being placed beneath the heater to give additional support to the table.
Patent GB-1001922-A (GB)
Title: Improvements in or relating to infra-red radiators
IPC: F24D13/02
Filed: 1964-07-13
Abstract: 1,001,922. Electric heating. HERAEUS QUARZSCHMELZE G.m.b.H. July 13, 1964 [July 11, 1963], No. 28875/64. Drawings to Specification. Heading H5H. An infra-red heating element adapted for operation in an upright position comprises two quartz tubes twisted around a common axis in order to give some horizontal support to the heating coils.
Patent GB-713411-A (GB)
Title: Improvements in and relating to the extraction of chlorotetracycline
Filed: 1952-11-17
Abstract: Chlorotetracycline is isolated from a fermentation broth by acidifying and then clarifying the medium, treating the clarified medium with alkali to form a precipitate with the calcium, barium, strontium or magnesium ions present in the broth, separating the precipitate from the supernatant liquor, extracting said precipitated material with acidified isopropanol, incorporating in the acidified isopropanol extract a water-soluble chloride, which is substantially insoluble in isopropanol, separating the isopropanolic extract from the aqueous layer thereby formed, and crystallizing chlorotetracycline hydrochloride from said extract. Mineral acids such as hydrochloric, sulphuric and phosphoric are used in the acidification steps, the pH being below 4, and preferably below pH2, pH1.5 being particularly effective. Suitable alkalies are sodium hydroxide, sodium carbonate and ammonia which are added to the clarified broth to produce a pH of 6 to 10, and preferably 7 to 9. In the example, a filter aid is used in both the acid clarification step and in the alkaline precipitation step.  Sodium chloride is used for salting out and the chlorotetracycline hydrochloride is crystallized from the isopropanol layer in the presence of 2-ethoxy ethanol. Specifications 690,381 and 672,510 are referred to.
Patent GB-280202-A (GB)
Title: Lubricating system for machinery
IPC: F16C3/14
Filed: 1927-10-31
Abstract: 280,202. Ahond, F. J. M. Nov. 4, 1926, [Convention date]. Force-feed lubricating.-A lubricator constituting an oil reservoir and embodying a pump is carried by a moving member of a locomotive or other machine and the pump is actuated by the relative movement between such member and an adjacent member, the pump being so arranged that the oil is delivered alternately to a number of conduits leading to the individual parts of the member carrying the lubricator. As shown in Fig. 3, a lubricator 9 is secured to the crankshaft of a locomotive between the cranks, its pump p being actuated by a lever 10 from an eccentric 11 mounted on the bush 12 of a connecting-rod head b<1>. The pump supplies conduits 13 - - 16 leading respectively to the big-ends of the connecting-rods, to the eccentrics operating the valve-gear, to the shaft bearings, and to the ends of the coupling-rods, the conduits passing through bores 4 in the shaft where required. In another form, a lubricator 20, Fig. 5, is secured to the shaft between the two eccentrics and its pump p is operated by a lever 21 carrying a roller 22 co-operating with cam surfaces on the eccentrics. This lubricator is slightly eccentric to the shaft, the inlet to the pump being at the point of greatest eccentricity. In another form a lubricator is mounted on a cross-head and its pump is actuated by a lever connected by a link to the connecting-rod. In the valve-gear shown in Fig. 8, comprising a rod 34 pivoted to a block 35 slidable in a slotted lever a pivoted at 39, a lubricator 38 is carried by the rod 34 and its pump is actuated by a rod 37 pivoted to the block 35.
Patent GB-1154808-A (GB)
Title: Fluid Pressure Regulator and Shut-Off Valve
IPC: G05D7/01
Filed: 1967-06-23
Abstract: 1,154,808. Valves. ITT INDUSTRIES Inc. 23 June, 1967 [30 June, 1966], No. 29108/67. Heading F2V. [Also in Division G3] A combined pressure-regulator and shut-off valve comprises an inlet 12 and an outlet 14 with a valve seat 10a, a diaphragm 16 carrying a valve member 20 to co-operate with the seat, the valve member side of the diaphragm being exposed to inlet pressure, and a spring 28 urging the member 20 towards the seat and mounted off-centre with respect to the axis of the seat so that when the valve is opened the member 20 is tilted off its seat. The diaphragm 10 encloses a chamber 24, and inlet pressure is passed through an orifice 26 to the chamber and an adjustable diaphragm relief valve 46 controls the pressure in the chamber 24 in response to pressure in a chamber 56 connected to the outlet 14 by a duct 58. A solenoid 34 is mounted on top of the valve and has a plunger 38, which, when the solenoid is de-energized, abuts a clamping screw 40 to hold the valve 20 closed. A lever 62 is pivoted at one end 62a and embraces a reduced portion 38a of the plunger, at the other end. When the solenoid is energized, plunger 38 is lifted, Fig. 2 (not shown), to free the valve 20, and lever 62 is rotated to allow a face 62c to free a closure member 50a of the valve 46. Movement of the member 20 is then controlled by the pressure in the chamber 24 which is governed by the relief valve 46. In Fig. 4 (not shown), the valve 46 is connected with a passage (68) and closure (76) in the plunger 38 by a flexible conduit (72).
Patent GB-1424370-A (GB)
Title: Manufacture of dicarboxylic acid diesters with substantial waste water purification
IPC: C02F1/26
Filed: 1973-06-20
Abstract: 1424370 Preparation of dicarboxylic acid diesters with substantial waste water purification BADISCHE ANILIN- & SODA-FABRIK AG 20 June 1973 [21 June 1972] 29226/73 Heading C2C A continuous process for the manufacture of a dicarboxylic acid diester from an aliphatic or aromatic dicarboxylic acid or anhydride thereof and an alcohol of from 3 to 15 carbon atoms comprises esterifying the starting materials in the absence of esterification catalysts at a temperature of from 150 to 250 C. with recycling of the alcohol used in excess, separating the reaction mixture from the water of reaction, steaming out the reaction mixture and then mixing it with an aqueous alkali for separation of the monoester, and acidifying the resulting aqueous monoester salt solution for the recovery of the monoester, wherein the aqueous monoester salt solution is treated, before, during or after acidification with from 0À5 to 1 times its weight of the same alcohol as used in the esterification, the resulting mixture is separated into alcoholic and aqueous phases and the resulting waste water is extracted with from 1 to 2 times its weight of the same alcohol, the alcoholic phase from this extraction is recycled to the esterification zone and the alcohol is separated from the waste water obtained by admixture of the aqueous phase from this extraction and the waste water arising elsewhere in the manufacturing process.
Patent GB-1236089-A (GB)
Title: An alarm system for use on board an aircraft
Inventor: MOLINE AUGUSTIN
IPC: B64D45/00
Filed: 1968-06-19
Abstract: 1,236,089. 236, 089. Testing alarm circuits. SUD-AVIATION SOC NATIONALE DE CONSTRUCTIONS AERONAUTIQUES. June 19, 1968 [July 6, 1967], No. 29250/68. Heading G1U. [Also in Division H3] A system for sequentially testing a number of alarm circuits comprises at least one automaticallystepped uniselector for energizing the circuits in succession, and current detectors which detect whether the alarm indicators of the energized alarm circuit respond to the energization, the detector outputs being applied to a control circuit which interrupts the stepping of the uniselector if any alarm indicator fails to respond. The embodiment described relates to aircraft alarm circuits in which occurrence of a fault energizes one of the leads b 1 , b 2  ..., Fig. 1, thereby activating one of the lamps c in a first display, a pair of lamps 4A, 4B... in a second display, and a single stroke gong 11. Detectors 15, 15 1 , 15 2  are provided to check the responses of these three indicators. Testing circuit. The uniselector SE, Fig. 2, having movable contacts B 1 -B 6 , energizes one alarm circuit in each of its positions by means of contact B 3  and lead#. Contact B 2  provides an earth connection if the circuit under test needs it, and contacts B 5 , Be energize a counter for indicating which circuit is under test. Each detector may comprise winding(s) 14 on a magnetic core connected in series with the associated indicator so as to saturate the core when current passes through the indicator. An A. C. supply is connected to an auxiliary winding 16 so that when the core is not saturated a voltage is induced in a detection winding 18, rectified by diode 19 and regulated by Zener diode 21. Permanent audible or visual checking of the A. C. supply is provided. The detectors may alternatively comprise resistive shunts or relays. The outputs of the detectors of each set are applied by means of leads E to a gate 22 which provides a fault signal at terminal 24 if any lead E carries a voltage. Control circuit. Provided there is no fault signal relay 32 is not energized and its contacts take up the position shown. After a time delay determined by unijunction transistor 36 and capacitor 37, transistor 38 is unblocked and contact 26a of relay 26 opened. This de-energizes relay 25 and allows the uniselector contacts to move to the next position, whereupon the cycle is repeated. Should a fault signal appear at terminal 24, however, transistor 30 is cut off and the positive voltage which appears at its collector is amplified so as to energize relay 32 and thereby disable the stepping circuit 35. In addition, after a time delay determined by unijunction transistor 41 and capacitor 42 thyristor 43 is switched on, thus activating a visual or audible indicator, e.g. a lamp for illuminating the counter. Manuallyoperated buttons 27, 28 are provided to respectively restart the stepping action and return the uniselector contacts to their starting position.
Patent GB-701557-A (GB)
Title: Improvements relating to gas turbine power plant
IPC: F01D17/16
Filed: 1949-03-25
Abstract: 701,557. Gas turbine plant; centrifugal compressors. CENTRAX POWER UNITS, Ltd., and BARR, R. H. H. March 10, 1950 [March 25, 1949], No. 29278/51. Divided out of 701,503. Classes 110 (1) and 110 (3) A gas turbine plant comprises a centrifugal compressor having diffuser ducting of variable throat area, heat input means, and one or more turbines one of which drives the compressor, one or all of the turbines being of the inward radial-flow type to which working fluid is continuously admitted to substantially the whole circumference of the rotor through nozzle means of variable throat area. The invention is described with reference to the gas turbine plant described in Specification 701,503 with the exception that the compressor does not discharge into a vaneless diffuser space. The compressor has a normal diffuser formed by a ring of vanes 50 mounted on pins 13a carrying levers 14b the free ends of which have pins 14c engaging radial slots 29a in an annulus 30a rotatably supported on rollers 31a. The annulus 30a is rotated by a lever 53 through a pinion 54. The lever 53 is operated in conjunction with the turbine inlet nozzle vanes from the accelerator pedal. Specification 701,552 also is referred to.
Patent GB-382742-A (GB)
Title: Improvements in or relating to electric discharge devices
IPC: H01R4/48
Filed: 1931-10-22
Abstract: 382,742. Discharge apparatus. M-O VALVE CO., Ltd., Marconi House, Strand, London, EDEN, C. G. and SMITHELLS, C. J., of General Electric Co., Wembley, Middlesex. Oct. 22, 1931, No. 29323. [Class 39 (i).] A lead is attached to an anode or other electrode, which forms a part of the envelope, by a metal member gripping the electrode. The metal member may be a corrugated ring which is slid over the electrode and the lead welded to it. In another form, a cap 4 has a corrugated end 5 which is pressed over the anode 1 and grips it tightly. The part 5 may be a close fit over the anode and may be slightly deformed in a three-jaw chuck before pressing it on. The terminal may consist of a threaded spindle which is serrated to engage serrations on the cap and which is spun out at the end to prevent withdrawal. In another modification, a strip 8 of steel is bent until the ends 9 are almost touching and is then slid over the anode 1. The lead may be welded to or be gripped by the metal member. Specification 331,250, [Class 39 (i), Electric lamps, Arc &c.], is referred to.
Patent GB-228116-A (GB)
Title: Improved apparatus for producing perforated written matter
IPC: B26F1/28
Filed: 1924-12-06
Abstract: 228,116. Brevetti Elettrograph, S. A. S., (Assignees of Barbieri, A.). Jan. 25, 1924, [Convention date]. Electric pens and pencils; reservoir pens.-To prevent alteration of matter written by a pen or pencil, the matter is perforated during writing by electric sparks passing between the pen or pencil and a metal plate supporting the paper or other material written upon. Figs. 1 and 2 show apparatus for connection by a plug 17 to alternating or direct current supply. A casing 14 on a base plate 1 contains a rheostat 15, a Ruhmkorff coil 21. a make-and-break switch 16. and a condenser 20. The casing is provided on the outside with a knob 6 and indicator 2 for controlling the rheostat, a switch 3 co-operating with integral contacts 17, 18, 19, and a safety spark gap 4 connecting with internal contacts 22. Terminals 13 are connected by a lead 10 to a box 9 provided with projecting arms 8, a press-button switch 11, and a lead 12 for attachment to a pen or pencil, which is normally supported in the arms 8 and holds down the switch 11 to break the circuit. The metal plate for supporting the paper is mounted on an insulating base provided with two contact studs for connection to the arms 8 of the box 9, one stud being connected by a lead to the metal plate. Fig. 3 shows a stylographic pen comprising a reservoir 29 of insulating material, a metal writing point 25 in a metal end piece 27, a finger-piece 28 of insulating material, and a cap 31 of insulating material provided with a vent hole 33 and enclosing a spring contact 32 making electric connection between the lead 12 from the box 9 and the writing point 25.
Patent GB-1506537-A (GB)
Title: Pressure responsive safety device for electrical circuits
IPC: H01H35/24
Filed: 1976-07-15
Abstract: 1506537 Condition sensing device HUG INTERLIZENZ AG 15 July 1976 [16 Feb 1976] 29512/76 Heading G4N [Also in Division H1] A pressure-responsive safety device for interrupting an electrical circuit comprises a housing 1, a pressure-responsive element 16 dividing the housing into two chambers 7, 14, chamber 7 being completely closed and chamber 14 including means 8 for exposing the element 16 to the pressure to be sensed, and a frangible electrical conductor 17 arranged so that the conductor 17 is broken when a predetermined pressure is exceeded. In other embodiments (Figs. 1 and 2, not shown) the conductor is in the form of a coating on, or a wire embedded in, a frangible glass tube or plate. In a further embodiment (Figs. 4 to 6, not shown) the pressure responsive element is a diaphragm (20) carrying a web (21) which cuts a conductive wire (22) extending between two terminals (23). The housing 1 or a sealed cover such as 2a may be transparent, e.g. of glass.
Patent GB-865402-A (GB)
Title: Improvements in or relating to electrical window operator units
IPC: E05F15/16
Filed: 1958-09-16
Abstract: 865,402. Window operating apparatus. WENTZ, A. W. Sept. 16, 1958 [Sept. 25, 1957], No. 29644/58. Class 20(3) An electrical unit for operating from within an automobile cabin, a mechanical regulator provided with a rotary spindle 16 connected in driving relationship e.g. through gears 14, 15 and a link 19 to a window (not shown), said regulator being separated from the compartment by a panel 13, the spindle 16 extending towards the compartment having its inner end with an external driving formation 21 of non- circular or splined cross-section; and the unit includes driving means comprising a connector member 50, 51 having a tubular portion 51 with a splined internal configuration for driving engagement with the formation on the spindle 16 and with a portion having a non-circular external transverse configuration 50 for driving engagement with an internal non-circular driving configuration of a sleeve element 48, driven by an electric motor through a worm gear 43, and a housing 24 enclosing the driving means which is mounted on the side of the panel 13 facing the compartment. The motor is operated by switches 32 within the housing 24.