baber/WOPTO huggingface dataset:
Patent GB-778111-A (GB)
Title: Improvements in or relating to electrical regulating circuits
Inventor: JOHNSON LESLIE BRIAN
IPC: G05F1/56
Filed: 1955-08-12
Abstract: 778,111. Automatic voltage and current control systems; automatic current regulation. MULLARD RADIO VALVE CO., Ltd. Aug. 12, 1955, No. 23309/55. Class 38 (4). In a D.C. voltage or current regulator, of the type in which a transistor T1, Fig. 1, has its collector-emitter path in series between source and load terminals I, O, respectively, the base of transistor T1 is controlled by the output of a second transistor T2 in the latter's collectoremitter circuit. This output varies in response to changes in the voltage difference between a reference source B1 and a variable control resistor R1, which are connected in series in the base-emitter circuit of transistor T2 and through which passes the output current of the network to the load R3 connected across terminals O, Oc. The transistor T1 is thereby controlled to maintain a substantially zero value of this voltage difference and a stabilized value of current in the load R3 determined by the setting of resistor R1. A separate source B2 provides a steady current in the collector emitter circuit of transistor T2. A constant voltage may be obtained from the network across terminals O, Ov, in which case R3 is a resistor incorporated in the network which influences the value of voltage maintained. In a modification, Fig. 2, the source B1 and resistor R1 are reversed in position, whereby the separate source B2 is dispensed with; and an amplifying transistor T3 is connected between the output of transistor T2 and the base of transistor T1. In the case of current regulation only, the source and load terminals may be inverted in either arrangement so that the regulation is forwardly-acting rather than retroactive.
Patent GB-1016114-A (GB)
Title: Circuit arrangement for mixing signals
IPC: H04N5/265
Filed: 1964-06-05
Abstract: 1,016,114. Transistor amplifier circuits; television. FERNSEH G.m.b.H. June 5, 1964 [June 5, 1963], No. 23330/64. Headings H3T and H4F.  In a circuit for mixing signals applied by way of amplifier stages delivering signal currents which are a linear function of the direct currents flowing through them, said amplifiers have a common load to the impedance of which is inversely proportional to the sum of the direct currents flowing through said stages. As shown in Fig. 1, television video signals at u 1 , u 2 ., u 3  are fed to amplifying transistors 4, 4<SP>1</SP>, 4<SP>11</SP> using a further transistor 8 as the common collector load. The amplitude of each individual signal fed to output amplifier 13 is adjustable by variation of the appropriate potentiometer 7 which controls the collector current, the impedance of transistor 8 being inversely proportional to the sum of the collector currents so that the superimposition of a further signal does not alter the maximum amplitude fed to the amplifier 13. In Fig. 3, combined video, blanking and synchronizing signals at 1, 1<SP>1</SP>, 1<SP>11</SP> are fed to respective push-pull amplifiers comprising transistor 15, 16. Transistor 15 have a common, current-dependent load comprising transistor 17 whilst transistor 18 forms a similar common load for transistors 16. A further push-pull amplifier comprising transistors 37, 38 is fed with synchronizing pulses from 41 so as to maintain the amplitude of synchronizing pulses at the output 27 substantially constant despite reduction in the amplitudes of the composite waveforms of all three stages 15, 16 by the effect of their gain controls 7. A diode 28 is arranged to be conductive at normal values of the combined collector currents of transistors 15 but becomes cut off when the gain controls 7 are set to a low value, the resulting voltage at point 40 being amplified at 31, 32 and passed via an emitter follower 35 to transistors 37, 38 so as to maintain the synchronizing pulse amplitude substantially constant under these conditions. Fig. 4 (not shown) relates to a fade-over arrangement using a pair of reciprocally ganged potentiometers replacing the gain controls 7. Fig. 5 (not shown) relates to a circuit for effecting a straight-cut between two video signals and comprises a pair of push-pull amplifiers similar to those shown in Fig. 3 having their respective emitters fed from opposite sides of a bi-stable trigger.
Patent GB-337415-A (GB)
Title: Improvements in or relating to the manufacture or production of fertilizers
IPC: C05B11/12
Filed: 1929-07-30
Abstract: 337,415. Holz. A., and Berdell, T. van D. July 30, 1929. Manures.-A mixed fertilizer free of chlorides is prepared by treating potassium chloride with sulphuric acid to produce potassium bisulphate and hydrogen chloride gas, expelling all the gas, preferably by maintaining the mixture at a temperature well below 200 C., and subjecting the bisulphate to the action of ammonia to convert the bisulphate into potassium and ammonium sulphates. The expelled hydrogen chloride is passed into an aqueous suspension of rock phosphate to form calcium chloride and free phosphoric acid, any insoluble solids are removed and sufficient calcium hydroxide added to precipitate. dicalcium phosphate. The dicalcium phosphate is separated and dried, preferably at not much above 100 C., and mixed with the potassium and ammonium sulphates in any desired proportions. An excess of sulphuric acid may be used to treat the potassium chloride so that the proportions of potassium and ammonium sulphates, formed on the subsequent treatment with ammonia, may be varied. The heat generated during the reaction between the potassium bisulphate and the ammonia, preferably gaseous, is sufficient to remove any water in the reaction mixture. Specification 300,402, [Class 1 (iii), Oxides &c., Metallic], is referred to.
Patent GB-238402-A (GB)
Title: Improvements in or relating to rotary printing presses
IPC: B41F13/10
Filed: 1924-10-03
Abstract: 238,402. Berry, J., (Semoto & Co., S.). Oct. 3, 1924. Printing-surfaces. - In rotary intaglio printing-machines in which the flexible printing-plate is strained round the printing-cylinder by a tensioning-bar mounted in a recess in the cylinder and engaging the ends of the plate, a capping- piece being provided to close the recess, the ends of the capping-piece have portions extending circumferentially of the cylinder to support the ink doctor so as to prevent it entering the slots between the edges of the capping-piece and the printing-plate. The printing-plate D, Fig. 1, has bent-up ends E engaging grooves in the tensioning-bar F which is adapted to be screwed to the bottom of the recess C in the cylinder A. The capping-piece H has end portions H<1>, Fig. 3, flush with the surface of the plate D to support the ink doctor and is fixed by screws to the end walls of the cylinder, or, as shown, is formed with a portion K adapted to be fixed to a collar J on the cylinder.
Patent GB-1537497-A (GB)
Title: Manufacture of electric cables
IPC: H01Q13/20
Filed: 1976-05-28
Abstract: 1537497 Leaky coaxial cable antenna RELIANCE CORDS & CABLES Ltd 28 May 1976 [29 May 1975] 23484/75 Heading H4A To form a coaxial cable for use as a leaky wave antenna, elongate conductive and non-conductive or semi-conductive elements constituting a flexible outer conductor of the cable are so braided that mutually spaced areas of non- conductive or semi-conductive material are created in the outer conductor. The areas may be created by use of a braiding machine having two contra-rotating sets of bobbins, at least one bobbin of each set being loaded with strands of insulating material or material that has been made semi-conductive by incorporation of, e.g., carbon black. The cable is useful in a communication system, e.g. in a tunnel.
Patent GB-676443-A (GB)
Title: Improvements in or relating to brush holder assemblies
IPC: H01R39/38
Filed: 1949-09-12
Abstract: 676,443. Brush holders for dynamo-electric machines. BRITISH THOMSON-HOUSTON CO., Ltd. Sept. 12, 1949 [Sept. 23, 1948], No. 23521/49. Class 35. A cartridge-type brush-holder comprises a tube 6 split longitudinally into parts 7, 8 having longitudinal grooves 11 each of which accommodates a brush 15. The two brushes 15 are separated by an insulation sheet 12 and each of them is acted upon separately by a spring 16. Fig. 2 shows how a lead 31 is connected to the brush assembly in which the two brushes 15 are shunted by a resistance 27 so that the leading brush is directly connected with the commutator segment and the trailing brush is connected with the adjacent segment through the resistance 27. This is done to produce sparkless commutation particularly in fractional horsepower machines.
Patent GB-244206-A (GB)
Title: Improvements in weighing machines
IPC: G01G23/18
Filed: 1924-10-06
Abstract: 244,206. Dopp Maschinen-und Waagenfabrik Akt.-Ges., Geb., and Dopp, F. Oct. 6, 1924. Printed records, apparatus for giving. - Relates to a direct-reading weighing-machine having printing mechanism carried upon a member freely rotatable about the indicator shaft of the machine, and consists in that the printing mechanism may be turned to a position in which the tare is cancelled, and that in other respects the machine sets itself automatically so that the nett weight may be read and printed. As shown, the printing mechanism is carried on a plate 5 which projects through a slot in the indicator housing 2 and is pivoted on a cylindrical boss 4 disposed coaxially with the indicator shaft 1. The card to be printed is carried in a slotted slider 7 guided in the plate 5. A type wheel 12 is mounted on the shaft 1 and is provided with notches 17 in its periphery, each notch corresponding to a, type graduation. The indicating means (not shown) comprise a pointer on the plate 5 adapted to register with a chart mounted on the shaft 1. In use, the plate 5 is rotated until the pointer coincides with the zero of the chart as displaced by the tare, and is then locked in position by a set screw 6. The load to be weighed causes a further displacement of the type disc and chart, and may be read directly from the chart and be printed by an inward movement of the slider 7. Lugs 26 projecting from the slider engage and deflect, during the inward movement, a lever 22, which .returns under the influence of a spring 23 and strikes the printing hammer 24. The type disc 12 is retained in position during printing by a stop member 16 engaging one of the notches 17. The stop member is resiliently mounted on a slide 13, Fig. 6, carried by the plate 5, and is pressed into engagement by the inward movement of the slide 7. A pawl 18 pivoted to the slide 13 is adapted to adjust the position of the type disc to ensure that the stop member engages a notch. Thus in the event of the load being fractional, the next higher unit is printed. During the outward movement of the slide 7 a bellcrank lever 25 is actuated, causing a movement of the rollers 28 carrying the carbon paper.
Patent GB-477224-A (GB)
Title: Improvements in and relating to drying of whey
IPC: A23C1/12
Filed: 1936-08-28
Abstract: 477,224. Preserving whey ; dried whey preparations. TRIGGS, W. W. (Kraft-Phenix Cheese Corporation) Aug. 28, 1936, No. 23618. [Class 49] [Also in Group XIII] A continuous method of drying whey comprises mixing a substantial quantity of dry whey powder obtained from a previous opera. tion of the method with a quantity of whey which has been reduced by evaporation to a moist semi-solid mass and heating such mixture accompanied by agitation to obtain a dry non-hygroscopic whey powder containing hydrated crystalline alpha lactose, part of which is mixed with fresh moist whey for the continuation of the process, the remainder being withdrawn. In the arrangement shown, moist whey is fed from a hopper 12 to a mixing device 13 which also receives dry whey from a chamber 17. The material is fed by blades 16 to a conduit 18 leading to a shredder mill 19 adapted to form a fine mixture. An outlet 20 leads to a tunnel 21 through which warm air is blown by a fan 23, conveying the material to a cyclone concentrator 24. Here the material is separated from the air which is withdrawn through a pipe 26, the material discharging to a tunnel 28. Through this tunnel air heated by a heater 10 flows, conveying the material to a cyclone concentrator 22, the warm air being forced by fan 23 through the tunnel 21, while the material drops into a conduit 30 provided with a cold air intake 31. A fan 32 forces the material through conduit 33 to a concentrator 34 from which the air is drawn along conduit 35 while the dried whey falls to the bottom of the concentrator. Some of it is drawn off and bagged at 37 while the rest is returned through chamber 17 to the mixer 13. The conduit 20 may be connected to the pipe 28 instead of to the pipe 21.
Patent GB-205632-A (GB)
Title: Improvements in transport units for transporting liquids in vehicles
IPC: B61D5/02
Filed: 1922-08-31
Abstract: 205,632. Smith, A. H., and Miner, E. G. Aug. 31, 1922. Tank wagons; vehicles with removable bodies; sides and floors.-In transporting milk or other liquids by rail a number of independently removable containers or units are provided having heatinsulating walls and each adapted to receive a liquid-carrying tank furnished with an inlet and outlet in register with ports in the container, the latter being secured to the railway vehicle by means of co-operating locking and guide members on the container and vehicle. The container is built up of a wooden framework comprising sills 12 and carlines 13, Fig. 3, which form saddle-blocks for supporting the tank 13<1>, and has double walls with an intermediate cork packing. At the lower corners of the container are arranged bevelled locking-members 7 adapted to co-operate with guide-pieces on the walls 3, Fig. 1, of the vehicle 1 to position the container against movement in the vehicle. The top of the container is provided with a removable door 20 fitting into an insulated opening 16 and giving access to the inlet 26 of the tank, which has a hinged cover 31. A second insulated door 37 on the container gives access to a housing 36, into which projects the outlet nozzle 34 of the tank, the nozzle being normally covered by a cap 33 but adapted for the ready attachment of a hose pipe. When a series of containers is mounted on the vehicle as shown in Fig. 1, each door 37 is disposed close to a side wall 3 or to an abutment thereon, thus preventing tampering with the locks 40 for these doors and the unauthorized removal of the contents of the tanks.
Patent GB-1513516-A (GB)
Title: Process for the production of sulphuric acid
IPC: C01B17/86
Filed: 1976-06-08
Abstract: 1513516 Sulphuric acid production INST KHIMICHE FIZIKI AKAD NAUK SSSR 8 June 1976 23670/76 Heading C1A H 2 SO 4  is produced by oxidizing SO 2  with O 2  at a total gas pressure of 2 to 80 atm. at a temperature of 40‹C. to 200‹C. in an acid free water or an aqueous medium containing up to 95 wt. per cent H 2 SO 4  and a catalyst comprising HNO 3  or a salt thereof and/or NO x  in an amount corresponding to 0À1 to 15% NO 2  by total weight of the medium. Preferred salts are cerium nitrate and silver nitrate. In an embodiment (see figure) atmospheric air is compressed to 2-80 atm. in a compressor I and fed to the combustion chamber 2 for burning the sulphurous starting material, a sufficiently high temperature in the combustion zone (800‹C.-2000‹C.) enables NO 2  to be produced by oxidation of atmospheric N 2 . The mixed gas stream issuing from 2 is cooled to 300‹C.-700‹C. in 3 and then passed to reactor A comprising a plate column operating at a pressure of 2-80 atm. and at a temperature of 40‹C. to 200‹C. and top fed with water, and in which the SO2 is countercurrent contacted. Excess heat may be removed from the reactor by SO2 pumped by 5 around coils in the reactor, this excess heat along with that generated in 3, may be used to drive turbines 6 and 12. Residual process gases are removed from 4 and decontaminated in 9, the gas stream being then also fed to a gas turbine unit 10. Using the energy generated in 6, 9 and 12 the process is capable of being completely self-supporting regarding power requirements. The sulphuric acid so produced, and withdrawn from the bottom of reactor 4, has a concentration of 93-95 wt. per cent.
Patent GB-1394556-A (GB)
Title: Drive mechanism for windscreen-wiping apparatus
IPC: B60S1/10
Filed: 1973-05-17
Abstract: 1394556 Windscreen wipers KNORRBREMSE GmbH 17 May 1973 [26 May 1972] 23677/73 Heading A4F [Also in Division F1] A windscreen wiper drive mechanism, e.g. comprising a fluid-operated motor having pistons 1 inter-connected by a rack 2 engaging a pinion segment 3, imparts rotary oscillations to a shaft 4 coupled with a windscreen wiper blade (not shown) and to damping means e.g. a shock absorber 9, which damps the oscillations, the damping being least when the blade is in its middle position and greater the nearer the blade is to its extreme positions of oscillation. The variable damping is achieved by pivotally connecting the shock transmitting part of the shock absorber 9 to radial arm 5 rigid with the shaft 4, and connecting the shock receiving part to a fixed pivot 10.
Patent GB-533782-A (GB)
Title: Improvements in or relating to directional radio receivers
IPC: G01S3/48
Filed: 1939-08-16
Abstract: 533,782. Directive wireless signalling. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Aug. 16, 1939, No. 23686. Convention date, Sept. 23, 1938. [Class 40 (v)] Omni-directional signals picked up on a spaced pair of " balanced " aerials 13, coupled to a common transmission line, are frequency-modulated at the receiver to an extent which depends upon the bearing of the distant transmitter, the resulting signal, after being converted into an amplitude-modulated wave, being compared with a local oscillator and standard frequency in a phasemeter to indicate direction. The frequency modulation is applied by a local oscillator 39 which vibrates a magnetic core in a coil 17 coupled to the aerial coil 13. So long as both aerials are equidistant from the transmitter, the signals are balanced and the movement of the core has no effect. But for any other direction of arrival, the incoming signals will be unbalanced and are frequency modulated in the input of the amplifier 21. The frequency modulator is shown separately in Fig. 2, where a coil 45, fed with local oscillations, vibrates in the gap 43 of the magnet 41. It is connected to, and drives a coil 47, which corresponds to the coil 17 in Fig. 1, and is therefore variably coupled to a coil 49 corresponding to the coil 13. The frequency modulation is subsequently converted into an amplitude modulation by a frequency discriminator circuit S3, 55, 57, 59 coupled to a pair of push-pull valves 61. The output is a current having the frequency of the local source 39, and a phase determined by the bearing of the distant transmitter ; it is fed to one coil of a phase-nicker 37 the other coil of which is fed directly from the local source 39. Any amplitude-modulated signal will be heard separately by the headphones 31, and does not affect the frequency-discriminating circuits of the direction indicator.
Patent GB-1074870-A (GB)
Title: Improvements in automatic control system
IPC: G05B19/35
Filed: 1966-05-26
Abstract: 1,074,870. Programmed control of machine tools. GENERAL ELECTRIC CO. May 26, 1966 [May 27, 1965], No. 23710/66. Heading G3N. In an automatic positioning system, particularly for numerically controlling the motion of a cutting element of a machine tool relative to a table carrying a workpiece, a programmed dimensional command is read into a register 14a and compared in a comparator 14c with an absolute actual position value stored in a register 14b. The output of the comparator comprises signals 15, 16 indicative of whether the command is larger or smaller than the actual position value. When the signal 16 is generated, signals from a count control 17 cause the register 14b to count up and a double count signal D. C. to be applied to a command phase counter 13a, fed with reference pulses from a clock 10a, to cause an output 13b to lead in phase the modified reference pulses on a line 11, derived through a counter 10b. A signal on line 16 causes the control 17 to supply a normal count signal N. C. to the counter 13a and a count down signal to the register 14b. The reference signal 11 is fed to a feedback phase control 20. comprising a resolver 20a relatively positioned by the machine tool, the phase shifted output of which is shaped and fed to a discriminator 21 together with the signal on line 13b. Since the resolver output passes through a succession of nulls the discriminator 21 is of the type containing a reversible counter which counts up or down each time the phase relationship of the input signals shifts through 360‹. The D. C. output of the discriminator, which incorporates a digital-to-analogue converter is fed to a positional servosystem 23 having velocity feedback. A velocity command 22 responsive to a programmed instruction V. C. modifies the signals D. C., N. C. to the counter 13a to control the feedrate. A variable feedrate is provided by the reference pulses being divided by a circuit 20 and applied through a circuit 21 to the velocity command 22 whereby the instruction V. C. can be manually over-rode.
Patent GB-1001426-A (GB)
Title: Improvements in or relating to display apparatus for card-like elements
IPC: G02B27/02
Filed: 1963-06-14
Abstract: 1,001,426. Shoots. K. A. VAN WORMER Jnr. June 14, 1963 [June 25, 1962], No. 23809/63. Heading B8S. [Also in Division G2] Apparatus for simultaneously displaying a stack of elements such as photographic transparencies comprises an inclined tray 11 removably supported on the sloping sides 12, 13 of base 14 and the sides 15, 16 at detachable top support 17. Lamps 41, 42 illuminate the slides mounted on tray 11 which is of translucent material such as lucite and has six channels with side walls each channel having six display sections such as 82, 84, 91 defined by the faces 92, 93, 95 of notches in slide rails, each notch receiving one slide when a stack of six is released from the top of a channel. Tray 11 may have concave curvature as shown, or may be flat, and base 44 may be covered with reflecting aluminium foil and may have ventilating holes 45. Support 17 is in two halves attached to each other and to base 14 by pin-and-socket connections, so that the dismantled support may be stored within the apparatus when cover 31 is closed.
Patent GB-225964-A (GB)
Title: Improvements in or relating to the production of stockings and like hose on straight bar knitting machines
IPC: D04B1/26
Filed: 1924-03-28
Abstract: 225,964. Goldie, L. M., (trading as Goldie, Wade, & Goldie). March 28, 1924. Drawings to Specification. Stockings and like hose having reinforced portions at the upper part of the leg to which are attached suspenders are knitted in a straight-bar machine with additional carriers for the splicing threads which are knitted into the reinforced parts.
Patent GB-937388-A (GB)
Title: Improvements in or relating to traverse mechanisms for winding threads
Inventor: SMITH FREDERICK ARTHUR
IPC: B65H54/28
Filed: 1961-07-01
Abstract: 937,388. Winding yarns. BRITISH NYLON SPINNERS Ltd. June 14, 1962 [July 1, 1961], No. 23837/61. Class 120 (2). A traverse mechanism for use in winding threads includes two endless chains 1, 3, rotated in opposite directions, one chain carrying arms 33, 35 and the other chain carrying arms 37, 39. Each arm carries a pin 41 against each of which the thread T is biased, in sequence, by a rocking arm 7. In Fig. 1, the arm 7 is being rocked towards the left in synchronism with the movement of chain 3 and consequently the thread T is held in contact with the pin 41 on arm 37 whilst thin arm 37 is moving to the left. In Fig. 4, arm 39 is shown in position ready to take over guiding duty to move the thread T to the position shown in Fig. 5. In Fig. 5, the rocking arm 7 transfers the thread from the arm 37 to the arm 33 and presses the thread against the pin 41 on the arm 33 whilst the arm 33 moves to the right. In Fig. 6, the righthand reversal position is shown with the arm 35 ahout to guide the thread to the left and back to the centre line of the traverse.