baber/WOPTO huggingface dataset:
Patent GB-912662-A (GB)
Title: Improvements relating to voltage and current regulating arrangements
IPC: G05F1/38
Filed: 1959-03-03
Abstract: 912,662. Automatic regulation. HARMER, H. M. June 2, 1960 [March 3, 1959], No. 7375/59. Class 38 (4). In a voltage regulating system, a primary alternating current circuit includes a first inductance or inductances in series with a second inductance. The first inductance has an iron core and is designed to operate over a range of flux densities below the knee valve of the flux/magnetizing-force curve. The second inductance has an iron core and is designed to operate over a range of fluxdensities above the knee valve and is substantially shunted by a condenser connected in series with a transductor. The inductance of the transductor is dependent on the output of a transistor amplifier so that the voltage developed across the transductor and the condenser will vary in such a manner as to compensate the load voltage for any change in its value that may tend to occur. As shown, primary windings of inductances L 1 , L 2  are connected in series with an alternating current source, and a transductor Td in series with a condenser C 1  is connected across the inductance L 2 . Secondaries S 1 , S 2  and S 3  of the inductances and the transductor are connected in series, and supply through a rectifier 9 and a smoothing choke L to a load connected between terminals 4, 5. The voltage at terminals 4, 5 is applied between emitter and base electrodes of a transistor 1 in opposition to the voltage across a Zener diode Z so as to maintain the terminal voltage substantially constant by varying the current through a control winding Sd on the transductor Td. The supply to the control winding circuit is derived through a rectifier W from windings a, b and c on the inductances and transductor. An additional control winding Sd2 is supplied through a rectifier W1 and parallel resonant circuit C 2 L so as to compensate for supply frequency variation. In a modification the transistor is connected to a transductor in each phase of a three-phase supply. In a further modification the Zener diode is connected in one arm of a bridge and the transistor compares the constant Zener potential with the potential at a tapping of a resistor forming two arms of the bridge. In a further modification, there is an additional secondary winding on inductance L and the secondary windings are Scott-connected to give a three-phase input to the rectifier. The emitter current of the transistor is limited by a barretter B and the regulated voltage adjusted by a resistor R. Specifications 493,362, 621,203, 668,641, 871,605, 912,663, 912,664 and 912,665 are referred to.
Patent GB-783454-A (GB)
Title: Improvements in or relating to process of extracting sodium vanillinate
Inventor: BRYAN COLLIS CHARLES
IPC: C07C47/58
Filed: 1955-03-14
Abstract: A process for extracting sodium vanillinate from an aqueous liquor containing the same, together with other dissolved solids, using a propanol as the liquor-immiscible preferential solvent for the sodium vanillinate, comprises mixing the aqueous liquor with an aqueous propanol in such proportions as to form a two-phase extraction system in which the raffinate has a solids content of 20 to 40 per cent by weight and propanol (100 per cent basis) is present in an amount equal to at least 30 per cent of the combined weight of the extract and the raffinate.  Autoclaved liquors, the aqueous alkaline sodium vanillinate-containing liquors obtained from the oxidative treatment in an autoclave of crude lignin-containing liquors, e.g. waste sulphite liquor, may be employed as starting materials.  The process may be carried out in a series of batchwise stages or continuously in countercurrent processes.  In examples: a crude sodium vanillinate obtained by autoclaving waste sulphite liquor, to which caustic soda has been added, under oxidizing conditions, is concentrated and treated with 80 per cent propanol to extract 78 per cent of the sodium vanillinate contained in the autoclaved liquor (1) whilst a similar process is carried out in a countercurrent, five stage, batchwise system using 78 per cent isopropanol (2). Specification 490,646, [Group IV], is referred to.
Patent GB-883493-A (GB)
Title: Method for the recovery of nitrogen values and acetic acid from mixtures containing nitric and acetic acids
IPC: C07C51/487
Filed: 1959-03-04
Abstract: A mixture containing nitric and acetic acids is treated with nitric oxide to reduce a major proportion of the nitric acid to nitrogen peroxide, and the nitrogen peroxide and the acetic acid are separated.  If the mixture to be treated contains water, it is preferably first treated, if necessary, to reduce its water content to not more than 1,5 mols. per mol. of nitric acid. More preferably, an aqueous mixture containing nitric and acetic acids is distilled so as to yield, as bottom product, an azeotropic mixture containing about 1 mol. of nitric acid and 2 mols. of acetic acid, the overhead distillation product comprising all the water and the excess of nitric or acetic acid over that required to form the azeotrope.  The overhead product is treated in known manner to recover the acid, and the azeotrope is treated with nitric oxide, preferably at above 21 DEG C., until up to 75% of the nitric acid has been reduced.  The nitrogen peroxide is recovered in known manner and the reaction residue, comprising water (produced in the reduction of the nitric acid), acetic acid and unreduced nitric acid may be returned, together with fresh mixture, to the distillation vessel in which the azeotrope is produced.  Alternatively, acetic acid may be distilled from the reaction product together with the nitrogen peroxide.  The reaction may be effected at atmospheric, reduced or raised pressure.ALSO:A mixture containing nitric and acetic acids is treated with nitric oxide to reduce a major proportion of the nitric acid to nitrogen peroxide, and the nitrogen peroxide and the acetic acid p are separated.  If the mixture to be treated contains water, it is preferably first treated, if necessary, to reduce its water content to not more than 1.5 mols. per mol. of nitric acid.  More preferably, an aqueous mixture containing nitric and acetic acids is distilled so as to yield, as bottom product, an azeotropic mixture containing about 1 mol. of nitric acid and 2 mols. of acetic acid, the overhead distillation product comprising all the water and the excess of nitric or acetic acid over that required to form the azeotrope.  The overhead product is treated in known manner to recover the acid, and the azeotrope is treated with nitric oxide, preferably at above 21 DEG C., until up to 75% of the nitric acid has been reduced.  The nitrogen peroxide is recovered in known manner and the reaction residue, comprising water (produced in the reduction of the nitric acid), acetic acid and unreduced nitric acid may be returned, together with fresh mixture, to the distillation vessel in which the azeotrope is produced.  Alternatively, acetic acid may be distilled from the reaction product together with the nitrogen peroxide.  The reaction may be effected at atmospheric, reduced or raised pressure.
Patent GB-1069182-A (GB)
Title: An improved method and apparatus for rating fuels
Inventor: LEWIS OLIVER GRIFFITH
IPC: G01N33/28
Filed: 1965-02-22
Abstract: 1,069,182. Measuring octane number electrically. ESSO RESEARCH & ENGINEERING CO. Feb. 22, 1965, No. 7498/65. Heading G1N. The octane rating of an internal combustion fuel is determined in a variable compression ratio engine from the composition of a reference fuel which gives the same standard level of "knocking" intensity as does the unknown sample at the same compression ratio, any rise of the voltage output from a pressure measuring transducer or transducers in the cylinder above a threshold level being used to measure the intensity of knock, and the actual threshold level being automatically adjusted in accordance with the compression ratio. The variation in threshold level is effected in order to differentiate between voltage peaks due to knocking and voltage peaks due to the normal higher combustion pressures of aromatic fuels. The compression ratio of the test engine is adjusted, while the sample fuel is being used, to give the standard knocking intensity, and the threshold level is automatically adjusted according to a predetermined curve relating compression ratio and threshold level for a given test engine. The methods of automatic adjustment disclosed are:-  (a) a differential transformer arrangement in which the core (10, Fig.6 not shown) moves with the cylinder head, and the coil assembly is driven by a motor (14) and gear-box to "follow up" the core, there being a cam member also operated by the gear-box and having a profile representing the predetermined curve, so that a potentiometer wiper operated by the cam inserts the appropriate gain variation in a transducer signal amplifier (2, Fig. 1 not shown) or adjusts the clipping level of a threshold amplifier (3). (b) a differential transformer arrangement as in (a) but in which the spindle which carried the cam operates a non-linear potentiometer directly. (c) a differential transformer as in (a) in which the cam spindle instead operates a linear potentiometer connected to the X-axis of a curve follower (45, Fig. 8 not shown), wherein a conductive curve is followed by a pen servomechanism moving in the Y- direction, which servomechanism also drives a linear potentiometer in the amplifier or clipping circuits of Fig. 1 (not shown). The threshold curve Fig. 4 (not shown) may be determined for a particular knock motordetonation meter combination using a dual beam C.R.O. in conjunction with the pressure transducers.
Patent GB-151543-A (GB)
Title: Improvements in or relating to the manufacture of plate and other window glass and apparatus therefor
IPC: C03B13/04
Filed: 1920-03-13
Abstract: 151,543. Ramsey, J. March 13, 1920. Delivering molten metal; rolling.-Relates to apparatus for making sheet and plate glass. The molten metal runs from a tank a through a valve c to a pot p, which is pivoted at d and provided with a bridge u to retain impurities. When the pot p is lowered by screws i<1> the valve c is automatically opened by a chain e connected at h to the pot p. When the pot p is raised against a heating-chamber o the valve c closes. The molten metal is delivered by the pot p to a pair of water-cooled rollers q, q<1> having removable fire clay coatings. The sheet thus formed passes between a pair of polished or fluted steel rollers t, t<1> on to a series of conveying rollers x which deliver the sheet to the leer.
Patent GB-540741-A (GB)
Title: Improvements in or relating to automatic telecommunication systems
IPC: H04Q3/62
Filed: 1940-04-26
Abstract: 540,741. Automatic exchange systems. STANDARD TELEPHONES & CABLES, Ltd., WRIGHT, E. P. G., and HARTLEY, G. C. April 26, 1940, No. 7535. [Class 40 (iv)] A closed chain circuit for allotting the finders of a group P-W for use in sequence is provided with a number of points of entry over wires SA-SD to which the start wire SL is connected in turn by a constantly rotating switch RU to vary the order of choice of the finders. The wires SA-SD may be connected up by the switch RU in an order other than the straightforward one shown.
Patent GB-509944-A (GB)
Title: Improvements in and relating to rolling mills
IPC: B21B35/04
Filed: 1938-03-10
Abstract: 509,944. Rolling. BRASSERT & CO., Ltd., H. A., THOMSON, T., and LOBKOWITZ, G. B. March 10, 1938, No. 7544. [Class 83 (iv)] Rolled ingots, blooms, and semi finished and finished metal products, e.g., channel beam and similar sections are produced by passing the work through a number of pairs of both horizontal and vertical driven grooved rolls, each roll pair being driven independently by its variable speed motor. The pairs of horizontal rolls 10 with various sized grooves 14, 15 and 16, have positioned behind them pairs of vertical rolls 9 also with various grooves 12, and either pair of rolls is movable vertically or horizontally to bring any groove opposite any groove of the other rolls. In Fig. 6, two pairs of vertical rolls 17, 18 each of fixed position operate with a single multi grooved horizontal pair of rolls 19 movable horizontally. A lay out of the plant comprises a blooming mill 1, shear 2, pairs of rolls 3 &c. rotary shear 6 and cooling beds 7.
Patent GB-919484-A (GB)
Title: Improvements in or relating to oscillatory electric motors
IPC: H01H53/015
Filed: 1959-03-04
Abstract: 919,484. Valve amplifying circuits. DREYFUS, J. A. March 4, 1959 [March 5, 1958; March 7, 1958; April 18, 1958; Feb. 21, 1959], No. 7552/59. Class 40 (6). [Also in Groups XV, XIX, XXXV, XXXVI and XXXVII] An amplifier for a moving coil oscillograph 425 (see Group XIX) comprises four directly coupled push-pull stages 401 . . . 410, the last having four valves in series-parallel push-pull. The input may be symmetrical at 411, 412 or asymmetrical at 411 only, in circuit with which is an attenuator 420. Filters, using components R1 . . . R4, L1 . . . L3 and C1 . . . C4 may be switched in to correct the frequency response of the oscillograph, and calibration is by potentiometers 421, 422 using a known voltage applied at 437 and a built-in meter 439. This test voltage is applied through its own attenuator 444 coupled to the input one 420.
Patent GB-538501-A (GB)
Title: An improved rotary engine
IPC: F04C2/36
Filed: 1940-04-27
Abstract: 538,501. Rotary engines. VOSSELER, H. F., PIERARD, A. W., YOUNG, W. H., and HARKNESS, B. G. A. April 27, 1940, No. 7602. [Class 110 (ii)] Three pistons 4 on a rotor 1 interact with recesses 6 in two rotary abutments 5 which are externally geared to the rotor. Inlet and exhaust passages 8, 9 on opposite sides of the abutments are connected by passages 10, 12 to pipe connections 11, 13.
Patent GB-622406-A (GB)
Title: Improvements in or relating to hair curlers
IPC: A45D2/12
Filed: 1947-03-19
Abstract: 622,406. Hair-waving appliances. BEDACK, M., and BEDACK, E. March 19, 1947, No. 7608. Addition to 585,652. [Class 131] The hair curler of the parent Specification is modified so that the bobbin-shaped body a is furnished at only one end with a number of open slots c for gripping the string g while the other end is provided with a central longitudinally extending hole d and at least one radial hole e communicating with the central hole for securing the string to the bobbin. The radial hole may be counterbored at f to form a recess housing the knot h.
Patent GB-479170-A (GB)
Title: Improvements in or relating to housings for apparatus employed in submarine cable systems
IPC: H02G15/14
Filed: 1937-03-17
Abstract: 479,170. Soldering. ELECTRICAL RESEARCH PRODUCTS, Inc. March 17, 1937, No. 7771. Convention date, March 28, 1936. [Class 83 (iv)] [Also in Groups XXXIX, V, and XXXVI] A water-tight joint between copper sleeves is made by arranging their ends one within the other, tinning the meeting surfaces and then uniting them with the help of the tool shown which is heated by the metal blocks 132 and then clamped round the joint.
Patent GB-358410-A (GB)
Title: Improvements in gage for chaser grinding
IPC: F01D11/00
Filed: 1931-03-13
Abstract: 358,410. Screwing die-heads. JONES & LAMSON MACHINE CO., Springfield, Vermont, U.S.A.-(Assignees of Bysshe, E. T.; 91, Summer Street, and Finn, R. R. ; 98, Wall Street, both in Springfield, Vermont, U.S.A.) March 13, 1931, No. 7862. Convention date, April 17, 1930. [Class 83 (iii).] Gauging devices are provided for use with dieheads with chaser locating means as described in Specification 356,223. The device comprises a member 20 having a dovetail slot to receive the chaser 5 to be checked after grinding to ensure that the cutting edge bears a definite relation to the serration by which the chaser is located in the diehead. A serrated plug 23 and controlling means therefor are provided similar to those in the diehead and the position of the cutting edge is checked by a lip 42 on a block 41 sliding in the body and contacting with a micrometer head 53, reference lines 56, 57 being provided on the block and body and also a zero-line 54 on the block for register with a predetermined graduation on the micrometer head.
Patent GB-952010-A (GB)
Title: Brush filters
Inventor: HALL SYDNEY
IPC: B01D46/28
Filed: 1962-03-01
Abstract: 952,010. Brush filters. HALL & KAY Ltd. Jan. 29, 1963 [March 1, 1962], No. 7949/62. Heading B1T. A filter element 14 comprises a brush 15 surrounded by a perforate sheath 18 which is flexible and has external longitudinal ribs 19. A plurality of such elements 14 are disposed within a rectangular frame 11 so that the ribs 19 of adjacent elements engage between one another and prevent passage of air between the elements. The frame 11 comprises four channelsectioned members 12 of which one has a side wall 12a removable; the elements 14 abut against a screen 13 supported in the frame. Each element 14 is formed by incorporating bristles 16 between the helices of two wires 17 twisted together. The sheath 18 is preferably made of hard but flexible extruded thermoplastic material. The frame 11 is releasably secured in a surround 21 by a bar 22. A plurality of frames 11 containing elements 14 may be disposed in parallel in a single surround or may be arranged in series.
Patent GB-1042424-A (GB)
Title: Improvements in or relating to sluice gates
IPC: E02B13/02
Filed: 1964-02-26
Abstract: 1,042,424. Hydraulic turbines. T. Z. LITOSTROJ. Feb. 26, 1964 [March 29, 1963], No. 8037/64. Heading F1F. [Also in Division G3 and El] A closure 1 in the lateral outlet of a water turbine, comprises parallel closures 2 connected by links 5 to a rod 6, the rod being connected to pistons 7 of servomotors 8. The closures 2 are pivoted such that flow through the closures acts to provide a force tending to open the closures. The turbine is provided with a blade setting ring 13 connected to pistons 12 of servomotors 11. A pump 17 provides control fluid through a line 16, having a relief valve 20 and through throttle 18 to a line 10 which leads to the servomotors 8 and 11. The opposite ends of the servomotors 11 are connected by a line 23 to an electrically actuated control valve 21 which can connect the line 23 to a reservoir 25 or the line 16. Under normal condition, the valve 22 is actuated in response to changes in load to cause actuation of the blade ring 13, the throttle 18 allowing sufficient flow to prevent a lowering of pressure in the conduit 10. With a sudden increase in load, the line 23 is connected to exhaust to the reservoir 25 and the fluid acting on the closures 2 opens these closures and actuates piston 7 to transfer control fluid to the pistons of servomotors 11 to close the blade ring 12. With decrease in load, control fluid flows to line 23 to open the blade ring 12 and the control fluid is exhausted through non-return valve 18 by actuation of the pistons of servomotors 11. In a modification the servomotor 8 are actuated directly by the valve 22 and are not hydraulically connected to the servomotors of the blade ring.
Patent GB-729737-A (GB)
Title: Improvements in or relating to vapour electric arc converters
IPC: H01J13/26
Filed: 1951-04-06
Abstract: 729,737. Metal-vapour converters. GENERAL ELECTRIC CO., Ltd., and GALLIZIA, E. April .7, 1952 [April 6, 1951], No. 8044/51. Class 39 (1). A seal for the anode stem of an arc converter consists of metal rings 5, 6 which are secured to one another by vitreous material. The seal is fixed either as shown or inverted to anode flange 4 and to the side arm 1 by a ring 7. The voltage gradient across the seal is controlled by resistances connected between the inner and outer flanges and to some of the rings.
Patent GB-500007-A (GB)
Title: Improvements in and relating to the external heating of superheated steam turbines and like machines
IPC: F01D25/14
Filed: 1938-03-15
Abstract: 500,007. Steam turbines. AKT.- GES. BROWN, BOVERI, & CIE.. March 15, 1938, No. 8048. Convention date, March 15, 1937. [Class 110 (iii)] The flanges and other parts of a turbine casing are heated by steam led through channels 3, 4 formed on the exterior of the casing. The channels may be formed by welding halftubes on to the casing as shown and the casing surface may be ribbed as at 6.
Patent GB-453940-A (GB)
Title: Improvements relating to illuminating devices for aircraft and the like
IPC: F21V5/00
Filed: 1935-03-15
Abstract: 453,940. Aircraft &c. lamps. HARLEY, M. C., The Red House, Cranford, Middlesex. March 15, 1935, No. 8060. [Classes 75 (ii) and 75 (iv)] An aircraft landing or take-off lamp, vehicle headlamp, or other lamp, comprises readily separable reflector and front elements a, b retained together by resilient clamping means j extending between the front element band an annular or hollow cylindrical element c engageable with a rear portion of the reflector element. The parabolic reflector a is formed at the rear with a cylindrical extension a<1> stepped down at a<2> to form a slotted tubular part a<8> in which the bulb holder e is gripped under the influence of the contracting band f. In Fig. 1, the hollow cylindrical element c forms a cap enclosing the extension a<1>, and engages directly against the rear of the reflector a. In Fig. 4, the annular element c abuts against the shoulder a<2>. The front ring b has an internal flange and cushioning ring a<4> against which the reflector a is held by the tension springs j and associated wires j<1>, which are detachable from the ring b. The assembly may be accommodated in an aerofoil, and is pivotally mounted by brackets k on the ring b, and a Bowden wire may be attached to the lug l. Specifications 372,285, 430,421, and 436,571 are referred to.
Patent GB-815322-A (GB)
Title: Improvements in or relating to speed indicators for rotatable members
IPC: G01P3/14
Filed: 1956-03-15
Abstract: 815,322. Gramophones. TELEFUNKEN G.m.b.H. March 15, 1956 [March 16, 1955], No. 8119/56. Class 40 (2). [Also in Group XIX] A speed indicator for indicating the speed of a rotatable member 2, such as the turntable of a record player or magnetic recording apparatus, comprises a magnetic member 5 mounted so as to be free to vibrate under the effect of periodic magnetic attraction by the member 2, the amplitude of vibration of member 5 affording an indication of the speed of the member 2. The member 5 comprises a permanent magnet mounted on a leaf spring 7 and the edge of the turntable 2 is provided with spaced ferro-magnetic teeth which periodically attract the magnet 5 and set it into vibration. The natural frequency of the magnet 5 and spring 7 is arranged to coincide with the induced frequency of vibration of member 5 when the table is operating at correct speed, whereby a large amplitude of vibration is obtained. An indicating mark 9 may be provided on the magnet 5, an indicator 11 on the chassis indicating the displacement of the mark 9 corresponding to the correct speed. The aperture through which the magnet is viewed may be provided with a flap which when closed prevents vibration of the member 5; alternatively the spring 7 and magnet 5 may be moved away from the table 2 when not needed. The teeth 4 may be constituted by the separating portions between apertures in a turntable or other rotating member and the permanent magnet 5 may be replaced by a ferromagnetic member magnetized by a coil carrying direct current. Alternatively the spring 7 may be formed of magnetized steel and loaded at its free end.