baber/WOPTO huggingface dataset:
Patent GB-958318-A (GB)
Title: Power control circuit
IPC: H03F9/00
Filed: 1962-03-20
Abstract: 958,318. Magnetic amplifiers. ROBERTSHAW-FULTON CONTROLS CO. March 20, 1962 [March 31, 1961], No. 10685/62. Heading H3B. In a self-saturating magnetic amplifier comprising a rectifier 10 and a saturable reactor 16 in series, the rectifier, Fig. 1, or the saturable reactor, Fig. 7, is shunted by the emittercollector electrodes 30, 32 of a transistor 28 and by a pair of resistors 24, 26 connected to the transistor base 34. In either ease the output of the amplifier to a load is controlled by varying one or other of the resistors. As shown in Fig. 1, the series rectifier and saturable reactor is shunted by a further saturable reactor 18 to provide full wave operation and a PNP transistor is used. In a modification of Fig. 1, Fig. 3 (not shown), positive feedback is provided by connecting a resistor between the transistor base and the load end of reactor 16. Alternatively negative feedback may be provided by connecting a resistor 50 as shown in Fig. 5. An NPN transistor may be optionally used in the Fig. 1 circuit, the modified circuit arrangement being shown in Fig. 4 in which positive feedback is provided by resistor 48. The feedback resistor 48 or 50 may be varied to provide further load current control. A half-wave self saturating amplifier using a PNP transistor circuit shunted across the saturable reactor 16 is shown in Fig. 7, a resistor 56 being provided across the rectifier 10 so that resetting current can flow during the periods when the rectifier is non- conducting. A modified circuit using an NPN transistor is also described, Fig. 8 (not shown). In each embodiment an optional resistor 36 provides degenerative stabilization and a capacitor 38 eliminates transients.
Patent GB-551483-A (GB)
Title: Improvements in or relating to boilers
IPC: F22B21/34
Filed: 1941-08-22
Abstract: 551,483. Water-tube steam boilers. BABCOCK & WILCOX, Ltd., and ZOLLER, R. E. Aug. 22, 1941, No. 10709. [Classes 123 (ii) and 123 (iii)] Furnace gases flow from a water-tube lined combustion chamber 4 through parallel passes 1, 2, 3 containing vertical water tubes 5, 6, 7 connected to upper and lower drums 9, 8, and, in the end passes, a superheater 11 and a reheater 12. The gas flow in each pass is controlled by separately operated dampers 16, 16<1> at the top of a partition separating the flow through the lower part of the tubes from the flow through the upper part. The combined gas streams escapes through a feedheater 18 and an air heater 20. The gas passes 1, 2, 3 are separated by walls 33, 34 containing downcomers. The economizer may be divided by plates forming extensions of the walls 33, 34, the flow of gases through the passes being controlled by dampers beyond the economizer. Water tubes 11, 12, 13 in front of the gas passes, and the furnace wall tubes are connected to a water drum 14 at the bottom of the bustion chamber. Air is conducted from the air heater through a duct 58 passing down the back of the combustion chamber into a space 59 below chamber floor and opening into a wind box 57. The U-shaped superheating or reheating tubes 12, Fig. 5, pass through holes in spacer plates 42 positioned by rods 43 secured to lugs 45 on the header 51.
Patent GB-551819-A (GB)
Title: Improvements relating to the treatmeut of india rubber and like substances
IPC: C08K5/375
Filed: 1940-06-21
Abstract: 551,819. Preserving rubber. STANDARD OIL DEVELOPMENT CO. June 21, 1940, No. 10710. Convention date Aug. 12, 1940. [Class 70] Rubber and synthetic rubber stocks are given age-resisting properties by incorporating therein metal salts of dialkyl dihydroxy diaryl sulphides or polysulphides or polymers thereof, or their selenium or tellurium analogues. The metals are those of Groups II to VI of the Periodic table, preferably aluminium, barium, calcium, chromium, magnesium, lead, tin, zinc or cadmium. Salts of alkyl phenol thioethers, alkyl phenol disulphides, polymers of alkyl phenol sulphides, and alkyl hydroxy thianthrenes, where alkyl contains 4 to 8 carbon atoms, e.g. zinc salt of the thioether of tertiary amyl phenol, calcium salt of diamyl dihydroxy diphenyl sulphide, thioether of tertiary amyl magnesium phenolate, may be used. Specifications 498,046 and 498,315, [both in Group III], are referred to.
Patent GB-180847-A (GB)
Title: Improvements in dynamo electric machines
IPC: H02K16/00
Filed: 1921-04-14
Abstract: 180,847. Price, S. L. April 14, 1921. Machines with two armatures.-In a combined magneto and dynamo geared together for ignition, starting, and lighting, in which the dynamo a is mounted outside the magnets of the magneto and the axes of the shafts of the dynamo and magneto are parallel to one another and at right-angles to the plane or planes of the magneto magnets e, the closed end of the magnet or magnets (with the outside casing if any) is shaped to conform to the external shape of the dynamo. Fig. 1 shows the machines secured together by a divided stirrup f.
Patent GB-107106-A (GB)
Title: Improvements in and relating to Electric Motor Control.
IPC: B60L11/18
Filed: 1916-08-04
Abstract: 107,106. British Thomson - Houston Co., (General Electric Co.). Aug. 4, 1916. Systems, mixed.-The motors of an electrically-driven locomotive are connected either to the trolly line or a battery by switches interlocked so that they cannot be closed together, and a voltage-reducing means is connected, by means responsive to the electrical condition of the battery, to the trolly and the battery. The motors 4, 5 are connected for ordinary seriesparallel control by the controllers 10, 15 and the supply line to the controllers includes the relays 20, 21. When the supply comes from the trolly line the coil of the relay 20 is energized and the relay is closed. The mechanical interlock 23 forces the battery relay 21 to open, and the open interlock 22 prevents current from energizing the relay 21. The battery 3 is connected to its relay winding through the winding of an am. pere-hour meter 30, the arm 31 of which rests on contact 33 when the battery is fully charged and on contact 32 when the battery is discharged. A motorgenerator 41, 42 may be switched in between the trolly and the battery by a double contactor 45. This contactor may be put in at any time by the depression of the button 48 unless the battery is fully charged, in which case the arm 31 short-circuits the contactor coil. As the battery discharges, the arm 31 moves to the left and eventually touches the contact 32 so that the contactor 45 is energized from the battery. The motor 41 is started up and the generator 42 will charge the battery while the contactor is held closed by a circuit through the interlock 46. If the trolly source fails, the relay 20 opens and the interlock 22 completes the actuating circuit of the relay 21 which closes and enables the battery to supply the motors. Lamps such as the headlights 50 may be supplied from the trolly while connected in series or from the battery while connected in parallel.
Patent GB-1025904-A (GB)
Title: Pharmaceutical compositions containing phthalimidine derivatives
Inventor: WARING WILSON SHAW
IPC: C07D209/46
Filed: 1963-03-20
Abstract: The invention relates to phthalimidine derivatives of formula <FORM:1025904/C2/1> wherein R is hydrogen or an acyl radical derived from a monocarboxylic acid and wherein ring B may be optionally substituted by one or more radicals selected from halogen, alkyl, amino, acylamino and alkoxy.  It comprises as novel compounds those phthalimidines in which ring B is substituted by a single chlorine, bromine or fluorine atom and a process for making those phthalimidines in which R is hydrogen which comprises reacting a compound <FORM:1025904/C2/2> with ammonia under reducing conditions, e.g. in the presence of hydrogen and a hydrogenation catalyst.  The compounds in which R is hydrogen may also be prepared by reducing 4-aryl-1-keto-2,3-benzoxazines with zinc and acetic acid or by reducing 1-arylphthalaz-4-ones with zinc and hydrochloric acid. The compounds in which R is acyl are made by acylating the corresponding compounds where-in R is hydrogen.  Examples describe the preparation of pthalimidines in which R is hydrogen and the ring B is phenyl, 2,3-, 2,5- or 3,4-dimethylphenyl, 3,4 - dimethoxyphenyl, 4-chlorophenyl, 4-bromophenyl, 4-fluorophenyl, and 2-aminophenyl, the latter being then acetylated to give 3-(2-acetaminophenyl) phthalimidine. 2-Propionyl-3-phenylphthalimidine is also prepared and the corresponding 2-acetyl compound referred to. 4-Aryl-1-keto-2,3-benzoxazine starting materials in which the aryl group is 2,3-, 2,5- or 3,4-dimethylphenyl, 3,4 - dimethoxyphenyl, 4-chlorophenyl, 4-bromophenyl and 4-fluorophenyl by reacting the corresponding substituted 2-benzoylbenzoic acids with hydroxylamine hydrochloride in the presence of barium carbonate.ALSO:Pharmaceutical compositions having analgesic, antipyretic or anticonvulsant activity comprise as active ingredient phthalimidines of formula <FORM:1025904/A5-A6/1> where R is hydrogen or the acyl radical of a monocarboxylic acid and ring B may optionally be substituted by one or more radicals selected from halogen, alkyl, amino, acylamino and alkoxy.  They may be administered orally, e.g. as tablets, capsules, aqueous or oily suspensions, dispersible powders or granules, emulsions, syrups or elixirs, parenterally in aqueous or non-aqueous medium, or as suppositories.  Other specified active ingredients are acetylsalicylic acid, codeine, salicylamide, p-acetamidophenol, phenacetin, primidone and diphenylhydantoin.
Patent GB-1442861-A (GB)
Title: Corrugated board-making machinery
IPC: B31F1/28
Filed: 1974-03-13
Abstract: 1442861 Laminates HENRY SIMON Ltd 7 Feb 1975 [13 March 1974] 11123/74 Heading B5N Apparatus for supplying heat and pressure to a corrugated paper board W comprises heated means, e.g. steam chests, for supporting a web of the board as it is drawn thereover, an endless belt 13 whose lower flight overlies the web as it is drawn over the heated means, a plurality of freely rotatable transversely extending parallel longitudinally spaced rolls 17 engaging the upper surface of the lower flight of the belt, a plurality of the rolls being journalled in bearings located in pivoted levers 20, and resilient spring means 24 for applying a variable force to the levers so that the effective weight of these rolls on the belt may be adjusted. Bell crank lever 20 pivotably connected to frame 21 comprises downwardly directed arm 18 and upwardly directed arm 19 provided with an aperture adjacent its end through which extends rod 22 which may be moved to the left and right in a reciprocatory manner by means of actuator 23 containing a worm and worm-wheel and arranged to be driven by a reversible electric motor. Compression spring 24 surrounding rod 22 bears at one end on lever 19 and at the other end in cup member 25 secured to rod 22 by means of pin 26 so that as the rod is moved towards the right an increasing force is applied to each of the arms 19 of bell crank levers 20 causing rolls 17 to tend to be lifted from engagement with belt 13 reducing their effective weight. Adjustment of the resilient spring means may be effected automatically in response to a temperature sensing device at the outlet end of the apparatus or in response to the speed at which the board is pulled over the heated means.
Patent GB-773345-A (GB)
Title: Improvements in and relating to electric current limiting arrangements, particularlyfor commutating contact rectifiers
IPC: H02M1/26
Filed: 1955-04-18
Abstract: 773,345. Rectifying. GENERAL ELECTRIC CO. April 18, 1955 [April 19, 1954], No. 11138/55. Class 38 (2). A current limiting circuit, Fig. 2, suitable for connection between the phases of a polyphase contact rectifier, Fig. 1, having switching chokes, to by-pass residual current at contact opening, comprises two rectifiers DPR1, DPR2 in series opposition through which equal currents circulate, whereby current passing through one rectifier is limited by the other rectifier to the value of the circulating current. The circulating currents ICC are produced by the rectifier inverse voltages, smoothed by reactors L1, L2 and equallized by voltage dividing reactor DR. In each phase supply to contacts such as C1, C3, C4 of a three-phase bridge connected contact rectifier are saturable closing step chokes, e.g. RL1, RL2 and saturable current opening step chokes DL1, DL2. They are biased through windings 30, 20 respectively from square wave generators 33, 60 comprising pairs of D.C. saturated chokes. Generators 60 have two pairs of series connected saturable chokes reversely biased by D.C., the pairs being connected across the respective halves of a centre-tapped transformer secondary winding, Fig. 6 (not shown), so that the current supplied to windings 30 is the difference between two substantially rectangular waves, shown dotted in Fig. 7. Each generator is separately controlled by its own variable resistor in the D.C. bias circuit, and all are controlled together by potentiometer 50. Rectifier 52 supplies bias current for all rectangular wave generators 33, 60. Considering current flow through contacts C1, when these contacts close volt seconds are absorbed by completion of saturation of choke RL1, the amount being determined by the biasing current so as to give magnetic phase angle voltage control. The saturation begins during the preceding fall of current to zero in contacts C4. To make the voltage control more sensitive, a gapped core 36 is associated with the core of choke RL1 by a winding in parallel with winding 30. The composite core has a'more sloping hysteresis loop than that of core RL1 alone, Fig. 5. When the current through contacts C1 reaches a low value during commutation to contacts C2, its rate of charge is slowed down first by desaturation of choke RL1 and then by desaturation of commutating choke DL1. Eddy currents in the choke RL1 give a gradual transition between the two effects. When, contacts C1 open at about the middle of the flux change in choke DL1, the current which is very small is taken by, and the reverse voltage is limited by, the current limiting circuit.
Patent GB-272324-A (GB)
Title: Improvements in or relating to electric motor converters
IPC: H02K47/06
Filed: 1926-04-28
Abstract: 272,324. Brush Electrical Engineering Co., Ltd., and Nixon, J. H. R. April 28, 1926. Synchronizing dynamo-electric machines.-For starting purposes, a motor converter is provided with primary and secondary windings constituting an induction motor of which the primary is cascaded with and fed from the secondary winding of the alternating-current side of the converter. The induction motor may be a separate machine mechanically coupled to the main converter, as shown in Fig. 1, or it may be embodied in the continuous-current side of the converter itself. In the form shown in Fig. 1, in which 3, 1 and 2 respectively represent the alternating-current primary and secondary and the continuous-current windings of the motor converter, the induction motor has its primary coils 4 cascaded with the converter windings 1 and its secondary coils 5 closed through a starting resistance 6. When the set has come to synchronism, the induction motor primary winding is short-circuited through its slip-rings by a known device 9 and it is connected at 8 to the neutral wire on the continuous-current side. The resistance 6 may be embodied in the secondary windings 5, in which case the windings take the form of a squirrel cage. Reference has been directed by the Comptroller to Specification 279,418.
Patent GB-198179-A (GB)
Title: Improvements in and relating to anti-glare devices for vehicle lamps
IPC: B60Q1/14
Filed: 1922-04-22
Abstract: 198,179. Hynes, C. L. April 22, 1922. Lantern shutters and screens. - An anti-dazzle device for vehicle lamps comprises a tinted or semi-translucent screen e mounted, between the source of light b and the lens d, on a rod f vertically adjustable in a tubular spindle g carried by a fitting h screwed into the casing a and held against rotation by an asbestos washer and a nut k. A cap i integral with or secured to the spindle g is provided with a finger piece m by which the spindle g is rotated and the disc e turned into a position at right-angles to the axis of the reflector, the movement of the cap i being limited by the engagement of shoulders n thereon with a stop on the cap i. The rod f is adjusted vertically in the spindle g by the engagement of a stud q with one of a series of oblique slots p, the stud q being held in engagement with the slots by a spring r. In a modification the rod f may be cranked.
Patent GB-348832-A (GB)
Title: Improvements relating to speed indicators for ships
IPC: G01P5/18
Filed: 1930-04-11
Abstract: 348,832. Ships' logs. WALKER & SON, Ltd., T., WALKER, T. S., and WALKER, J., 58, Oxford Street, Birming- ham. April 11, 1930, No. 11553. [Class 97 (ii).] In an electric speed indicator for ships a uniformly moving time element is coupled to an indicating member for a period controlled by an element which moves in proportion to the distance traversed and is electrically operated by a ship's log. In the form shown, the electromagnet 1, Fig. 4, and leads 2 are intermittently energized by contact mechanism operated by the ship's log (not shown). A spring- urged pawl 6 mounted on the armature 3 engages and drives a ratchet wheel 9 on the shaft 10 the angle of rotation of which is thus proportional to the distance traversed. A contact 17 in series with the leads 18, 19 is intermittently closed by the engagement of a roller 16 on the blade-spring 15 with a cam 11 on the shaft 10. In the indicating member, Fig. 1, is mounted a uniformly rotating time shaft 23 on which a spider frame carrying a number of electromagnets 36 is mounted. A dial drum 22 graduated to indicate speeds, and soft iron flanged disc 33 are rotatably mounted on a fixed sleeve 26 and are attached thereto by spiral springs 34, 35, respectively, which bias them towards a zero position. The leads 18, 19 from the distance element, Fig. 4, are connected through a battery and rotary terminals 38, 39 to the electromagnets 36 which when energized attract the disc 33 and carry it round with the time shaft 23. A peg on the disc 33 is adapted to engage a peg 43 on the dial 22, the latter being carried round with the disc 33 and time shaft 23 to give an indication of the time taken by the ship to traverse a standard distance. When the circuit including the leads 18, 19 is broken the disc 33 is returned to the zero position by the spring 35 but the dial 22 is retained in the indicating position by the spring-urged brake 48 which however is adapted to be withdrawn by the electromagnet 49 when the contact 17 closes to start another indicating cycle. In order to provide a measurement of speed throughout a wide range a battery of electromagnets, discs, dials and cams may be provided, the electromagnets being geared to the time shaft to rotate at different uniform speeds and the cams being varied to correspond to different standard distances. To obtain a continuous indication a single dial may be actuated alternately by two sets of mechanism controlled by independent cams operated by a single log.
Patent GB-425199-A (GB)
Title: Improvements in or relating to knitting machines
IPC: D04B15/48
Filed: 1934-04-17
Abstract: 425,199. Knitting-machines. HEMPHILL CO., Central Falls, Rhode Island, U.S.A.-(Assignees of Lawson, R. H.; 55, Cooke Street, Pawtucket, and Cloutier, A. N.; 495, Broad Street, Lonsdale, both in Rhode Island, U.S.A.) April 17, 1934, No. 11562. Convention date, Aug. 28, 1933. [Class 74 (ii)] In association with means for separately knitting two or more yarns at one time, a yarn controlled tension equalizing device is provided to enable split hosiery fabric of uniform appearance to be made. If any yarn tends to be fed at a faster rate than another, the device resists this tendency by holding back the one and releasing the other yarn. The device consists of a bracket 111, freely movable on vertical pivots, yarn guide arms 114, 115 and co-operating yarn-engaging elements 119, 120. The yarns 11, 12 pass through eyes in and determine the position of the bracket. Each yarn pursues a more or less tortuous path through the bracket 111 &c. according to its tension relative to the other yarn and tends to set the bracket in a position where the difference of tension is a minimum. In a modified construction the yarns 11, 12 pass between intermeshing rolls which act in the same way. One of the yarns is withdrawn at predetermined times e.g. during reciprocation. Overlapping rotary members 48, 49 mounted on brackets 92, 93, one of which can be moved away during heel and toe work may be employed as described in Specification 425,182, to indicate visually whether the yarns are being fed at the same or different rates. In another form, when the disc 48 moves away from its yarn 12, the same yarn is moved away from the feed rolls. The length of loop knitted at the various feeding stations may be simultaneously varied, by a cam 58 on the pattern drum 54. A frame 63 attached to the lower part of a bell-crank 65 bears on the cam 58. The horizontal arm 71 supports a slide 73 on which is mounted the auxiliary stitch cam block 4. The frame 63 also controls, through parts 79 .. 89, the vertical position of a bar 90, to which is fastened the main cam block.
Patent GB-296137-A (GB)
Title: Improved magnetic alloys
IPC: H01F1/147
Filed: 1927-04-30
Abstract: 296,137. Smith, W. S., Garnett, H. J., and Holden, J. A. April 30, 1927. [Convention date]. Drawings to Specification. Annealing.-Magnetic alloys of iron, chromium, and aluminium in the form of wire may be wound on a copper conductor and passed through a tube furnace at 900 C.; or the material may be annealed at 1020 C.
Patent GB-1511802-A (GB)
Title: Sprinkler head
IPC: A62C37/12
Filed: 1976-03-23
Abstract: 1511802 Sprinkler head GRUNAU CO INC 23 March 1976 [25 March 1975 19 Jan 1976] 11596/76 Heading A5A , A fire extinguisher sprinkler head comprises a frame 1, discharge outlet 4, a deflector plate 8, a compression screw 7, a cap 9 normally closing 4 and a release lever assembly comprising a lever 11 and a strut 26, the lever 11 having two side arms 16 with sockets 20 therein which hold a tube 23 full of fusible material 24 via balls 22 which are partly located in the sockets and partly in recesses formed in 24, the outer part of tubing 23 resting against strut 26, the lever 11, strut 26 and tube 23 being tensioned by offset pressure from the screw 7. In fire conditions 24 melts and allows the balls 22 to be displaced inwardly in 23 due to the tension thereon, thus allowing 23 to fall away. The unsupported lever 11 and strut 26 then fall and allow cap 9 to come free of 4. Ramps 21 are provided on the side arms to facilitate insertion of the tube 23 and balls 22. In a second embodiment the strut contacts the adjusting screw directly and the lever contacts the cap.