baber/WOPTO huggingface dataset:
Patent GB-696848-A (GB)
Title: Improvements in and relating to electron discharge valve amplifiers
Inventor: BERRY SIDNEY DUNDAS
IPC: H03G3/08
Filed: 1951-04-11
Abstract: 696,848. Valve amplifying circuits. BRITISH BROADCASTING CORPORATION. March 31, 1952 [April 11, 1951], No. 8471/51. Classes 40 (v) and 40 (vi). Gain control in an amplifier is effected by applying a negative feed-back voltage derived from a high impedance in the anode-cathode path of the final valve to the adjustable tap on a high impedance potentiometer connected between one output terminal of the amplifier and a small resistance in the grid-cathode circuit of an earlier valve. As shown, the potentiometer is connected between the cathode resistor R3 and the output terminal T, the negative feed-back and output voltages being obtained from a resistor R4 in the anode circuit. Upward movement of the slider decreases the proportion of the voltage fed to the output, increases the negative feed-back and reduces the effective value of the anode load of the final valve. Additional stages may be interposed between the two valves. Zero output when the slider is in the uppermost position may be ensured by combining the control with an on-off switch which becomes effective in the uppermost position.
Patent GB-162886-A (GB)
Title: Improvements in steam superheaters
IPC: F22G7/14
Filed: 1920-03-22
Abstract: 162,886. Robinson, J. G., and Thom, R. A. March 22, 1920. Jointing tubes to headers. - The tube ends 10<a>, 11<a>, of the U-loop tubes of a smoke tube superheater, are secured in flange blocks 12 provided with a hole 14 and slot 16 engaging a T-headed bolt 17<b> and a stud 13 respectively, and which may also be provided with a packing joint so that the superheater elements can be removed without springing the ends, by a simple sliding motion. In a modification an open-ended slot is also provided at 14. A further modification describes loose flange blocks engaging collars on the tube ends spigoting into recesses in the header wall.
Patent GB-675051-A (GB)
Title: Improvements in or relating to ª-chlorovinylsilanes
IPC: C07F7/08
Filed: 1950-04-04
Abstract: Polymers are obtained by copolymerizing alpha-chlorovinylsilanes of the general formula (CH2=CCl)SiR3-nXn, wherein R represents an alkyl or monocyclic aryl radical, X is a fluorine, bromine or chlorine atom and n is 0, 1, 2 or 3, with organic olefins, e.g. styrene, vinyl chloride or vinyl acetate.  Organopolysiloxanes are obtained by cohydrolysing and condensing alpha-chlorovinylsilanes of the above general formula having silicon-bonded chlorine and other functional organosilanes.  Specification 675,050 is referred to.ALSO:The invention comprises alpha-chlorovinylsilanes of the general formula (CH2=C.Cl)SiR3-nXn, wherein R represents an alkyl or monocyclic aryl radical, X is a fluorine, chlorine or bromine atom and n is 0, 1, 2 or 3, and a process for the preparation of the above compounds by dehydrohalogenating a compound of the general formula (CH2ClCHClSiR3-nXn, wherein X, R and n have the above significance. The compounds may also be prepared by the dehydrohalogenation of alpha-beta-dichloroethyltrihalosilanes and then the group R may be introduced by means of Grignard reagents or with organosodium or organolithium compounds.  The dehydrochlorination step may be effected by reaction with tertiary amines, particularly the cyclic tertiary amines such as quinoline or picoline.  In the examples the following compounds are prepared: alpha-chlorovinyltrichlorosilane, alpha - chlorovinyltrimethylsilane, alpha - chlorovinylphenyldichlorosilane, and alpha-chlorovinyldimethylchlorosilane.  Specification 675,050 is referred to.
Patent GB-164546-A (GB)
Title: Improvements in vacuum cleaning apparatus
IPC: A47L5/04
Filed: 1920-03-23
Abstract: 164,546. Fleetwood, E. J. March 23, 1920. Vacuum and like cleaning-apparatus; bellows. -The bellows of a portable vacuum cleaner are actuated through horizontal treading boards B, Fig. 1, placed above the horizontal and fixed upper boards A of the bellows and connected by uprights R to the lower bellow-boards Z. The bellows communicate through the inlet valves V with a filter P and an inlet I, and are provided with outlet valves E. The bellows are normally kept closed by springs inserted beneath the lower boards. In a modification, in which the bellows are hand-actuated, the lower bellows-boards are connected to levers W, Fig. 2, mounted upon a shaft O actuated by a pole.
Patent GB-792357-A (GB)
Title: Improvements in and relating to making rimmed steel with a high carbon content and a rimming agent therefor
IPC: B22D27/06
Filed: 1956-03-19
Abstract: An exothermic mixture for use in rimming steel consists of 40-80 per cent iron oxide, 5-20 per cent sodium fluoride, 2.5-17 per cent granular aluminium, and 5-34 per cent sodium nitrate. The sodium nitrate should be double the amount of aluminium.  An ingot of rimmed steel containing from 0.35 to 1.10 per cent carbon may be produced by pouring the steel while liquid into ingot moulds and, preferably before the mould is half filled, adding to the steel therein the rimming agent in amount from 1 to 4 lb. per ton of the ultimate weight of the ingot, and when pouring is completed allowing rimming to proceed for a predetermined time e.g. 15 seconds to 5 minutes. The ingot is then "precapped" chemically to arrest the rimming action by the addition of e.g. 2 oz. per ton of ingot of a deoxidizer such as Al, or CaSi alloy, after which the moulds are mechanically capped. The carbon and sulphur contents of the outer zone or rim of the ingot are less than the average for the ingot.  The iron oxide in the mixture may be globular and in the form of deseamer dust, that is granular refuse formed by oxidation in the flame-scarfing of slabs, billets, &c.
Patent GB-197797-A (GB)
Title: Improvements in or relating to telephone systems
IPC: H04Q3/62
Filed: 1922-03-24
Abstract: 197,797. Western Electric Co., Ltd., and Polinkowsky, L. March 24, 1922. Commutator switching-arrangements. - In a method of generating ringing-current in an automatic telephone, system, the primary windings of the ringing-transformer 48 are connected to the front and back contacts of a slow-acting relay 45 which is wired to a slow-acting relay 46 in such a way that these relays are intermittently energized and de-energized, thus generating ringing impulses in the transformer secondary. The arrangement operates periodically under control of a relay 44 energized by a switch arm 47b mounted by a magnet 47 energized intermittently by a set of interconnected relays 41, 42, 43.
Patent GB-671267-A (GB)
Title: Improvements in or relating to adjustable wheel assemblies
IPC: B60B23/12
Filed: 1950-04-06
Abstract: 671,267. Vehicle wheels. FORD MOTOR CO., Ltd. April 6, 1950 [July 26, 1949], No. 8672/50. Class 144 (i) and 144 (ii). A wheel and tyre assembly, particularly for use on tractors, providing for variation of tracking-width, comprises a central hub-member 11 on which a reversible disc 14 is secured by bolts 13. Near its outer periphery, the disc is provided on its opposite faces with bosses 18, 19 for mating-engagement with the inner ends of bracket-spokes 23 which are detachably secured, in reversible positions, by bolts 32. A tyre-carrying rim 46 is secured, in axially-selected positions, to the outer ends of the spokes by bolts 57 engaging transverse slots 52 in brackets 43 spaced around the rim,
Patent GB-146083-A (GB)
Title: Improvements in or relating to cranes
IPC: B66D5/00
Filed: 1920-03-24
Abstract: 146,083. Bernard, P. B., and Moutier, A. L. June 26, 1919, [Convention date]. Addition to 130,999, [Class 78 (v), Winding and paying-out apparatus &c.]. Jib cranes.-The epicyclic reducing-gear described in the parent Specification for operating the winding-barrel of a crane winch is duplicated to form a reversing-gear for slueing and traversing the crane. The shaft A drives the epicyclic reducing-gear 1<a> which is. geared to the winding- drum 4, and also drives through gearing 16 two similar epicyclic gears 1 having brake drums controlled by a lever 22 and geared to a pinion 23 meshing with the usual platform wheel 24. Similar mechanism is used for traversing the crane.
Patent GB-308592-A (GB)
Title: Improvements in and relating to the production of printing formes for intaglio printing
IPC: G03F5/24
Filed: 1929-03-18
Abstract: 308,592. Ringier & Co. Verlagsanstalt & Vereinigte Buch-und Steindruckereien. March 23, 1928, [Convention date]. Photo-mechanical printing-surfaces. - To produce a diapositive for use in the production of intaglio printing-surfaces, a series of non-transparent picture negatives are produced or mounted in the desired relative positions on an opaque background, together with any desired text or line matter also in negative form (i.e. white lines) and the combination is reproduced to obtain the diapositive. The reproduction may be through a half-tone screen, or the screen may be independently produced on the resist used in making the printing surface.
Patent GB-721379-A (GB)
Title: Improvements in or relating to rotary cutter heads for woodworking machines
IPC: B27G13/10
Filed: 1952-04-04
Abstract: 721,379. Rotary wood-cutters. WHITEHILL SPINDLE TOOLS, Ltd., and SMITH, S. F. April 1, 1953 [April 4, 1952], No. 8719/52. Class 145 A rotary cutter head comprises a pair of main cutters 12 and one or more auxiliary grooved cutters 23 arranged edgewise to incise the wood grain at the edges of the grooves to be cut, the auxiliary cutters being adjustable parallel to the axis of rotation of the head by screw means. Each auxiliary cutter is a close fit in a groove 38 .in the head and its end 27, which is slotted at 28 to provide for radial adjustment, is held between a pair of screwed clamping members 36, 37 fitted in a screwed bore 35 into which the groove 38 extends. After adjustment of the cutter position by rotating the clamp 37 by means of a key extending through a large hexagonal hole 41 in the upper clamp 36 into a smaller hexagonal hole 42 in the lower clamp, the upper clamp, which has a spigot 40 fitting into the slot 28, is tightened down to secure the cutter in position. If the desired adjustment of the crank-shaped cutters is impeded by the parts 43 of the body, the cutters may be removed, inverted and re-inserted. In modified clamping means, Fig. 5, a plug 44 or 52 is adjustable in a screwed bore 35a or 35b and the cutter is either held in engagement with a shoulder 48 on the plug 44 by a nut 47 screwing on a spigot of the plug or is held against the bottom of the plug 52 by a flanged nut 55 which is adjustable by a screw 56 and has a squared portion 59 closely engaging the slot 28 of the cutter. Index marks may be provided on the clamping members and on the head. The auxiliary cutters may be inclined to the plane of rotation by suitable shaping or by inclining the screwed bores. The main cutters 12 may each be clamped by a rectangular block 14, screw 16 and nut 15 and be backed by a member 19, similarly to the cutters of the head described in Specification 631,652:
Patent GB-498646-A (GB)
Title: Improved magnet system for a loudspeaker or like device of the moving-coil type
IPC: H04R9/02
Filed: 1938-03-22
Abstract: 498,646. Sound-reproducing devices. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENTFABRIEKEN. March 22, 1938, No. 8737. Convention date, March 23, 1937. [Class 40 (iv)] In a magnet system for a moving-coil device, the parts of the system conveying the magnetic flux between an annular pole-piece 3 and a centre pole-piece J are held together by a ring 4 which is mechanically attached to the annular pole-piece, is secured solely by friction to the centre pole-piece, and is utilized to centre the pole-piece 1 accurately with respect to the aperture in the pole-piece 3. The magnetic member between the pole-piece 3 and a yoke 2 may be cylindrical or may be formed by a series of members of rectangular cross-section engaging in recesses in the member 2. The chassis 10 may be provided with tongues 8 which engage in recesses formed in the magnet 5 and/or in the pole-piece 3.
Patent GB-1224411-A (GB)
Title: Improvements in and relating to a method of and a device for testing gear wheels
Inventor: FINDEISEN WALTER
IPC: G01M13/02
Filed: 1969-02-18
Abstract: 1,224,411. Testing gear wheels. WERKZEUGMASCHINEN KOMBINAT "FRITZ HECKERT" KARL-MARX-STADT VEB. Feb. 18, 1969, No. 8771/69. Heading G1M. In a method of testing gear wheels 8, 9, one gear wheel 8 is rotated by an input drive which is isolated from the gear wheels during the test process. The apparatus for performing the method comprises a housing 1 in which a displaceable carriage 5 is mounted in guide means 4. A spindle 7 for the gear wheel 9 is secured in the carriage in a support 6, an eddy current brake 24 and a rotary oscillation pick up 25 being mounted on the spindle. A spindle 3 for the gear wheel 8 is connected to a flywheel 11 by a coupling 13 and a second rotary oscillation pick up 10 is secured to the end of the spindle. A motor 23 rotates the flywheel 11 via friction discs 14, 15, the disc 14 being mounted on a bridge which is movable in a direction perpendicular to the rotational axis of the disc to disengage the drive from the motor to the flywheel. When rotation has been imported to the gear wheel 8, the motor drive is disengaged and the eddy current brake system is engaged to ensure tooth flank contact between the gear wheels 8, 9 under test. The pick ups are connected in an electrical circuit and measure the effects of errors due to the drive and due to the gears, the former errors being eliminated by the circuit since they are only recorded by the pick up 10. The pick ups may alternatively comprise spring restrained gimbal suspended gyros.
Patent GB-126826-A (GB)
Title: Improvements in or relating to the Trolley Heads of Electrically Propelled Vehicles.
Inventor: COLLINS CHARLES WILLIAM
IPC: B60L5/06
Filed: 1918-05-28
Abstract: 126,826. Collins, C. W. May 28, 1918. Trolly heads for electrically propelled vehicles of the kind described in Specification 10293/07 are provided with a second or safety catch e adapted to engage hooks h on the pivoted head b, this catch being controlled by the first catch g whereby both catches release the pivoted head b simultaneously. The catch e works in a transverse sdot in the fixed part a and is pressed upwards by the spring f. The trolly control rope is attached to an arm e on the head b whereby the initial pull on the rope re-sets the pivoted head.
Patent GB-798084-A (GB)
Title: Improvements relating to frequency dividing circuits
Inventor: WHITE ERIC LAWRENCE CASLING
IPC: H04N5/06
Filed: 1954-03-26
Abstract: 798,084. Electronic. counting-apparatus. ELECTRIC & MUSICAL INDUSTRIES, Ltd. March 28, 1955 [March 26, 1954], No. 8822/54. Class 106 (1). A frequency dividing circuit comprises a chain of binary counters, feedback connections enclosing different groups of counters and capable of feeding back signals in such manner as to increase or decrease the division ratio of the circuit and means for selectively disabling the connections so that the division ratio can be varied selectively in discrete steps. The frequency divider shown comprises series-connected binary counters BC1-BC9 input pulses being applied to BC1 through a gate G controlled by a trigger circuit T, e.g. of the Eccles- Jordan type. When the trigger is switched to the " 1 " condition by a pulse fed back from BC9 via diode D5, or, if switches S1-S4 are closed, from BC5, BC6, BC7 or BC8 via diode D1, D2, D3 or D4, it closes the gate so that the next input pulse is barred, this pulse resetting the trigger via delay means DM; the division ratio is thus increased by 1. Therefore, by selective operation of switches S1-S4 the division ratio can be varied between the limits 513 (2<SP>9</SP> + 1) and 543. For a colour television system, e.g. as described in Specification 798,083, [Group XL (b)], the divider produces, from input pulses having the chrominance subcarrier frequency, pulses of half the line frequency from counter BC9. The two outputs of BC9 may be combined as shown, by means including delay DM2, to obtain line frequency pulses; and double line frequency pulses for interlacing are obtained from BC7. The switches S1-S4 may be operated automatically by relays controlled e.g. in accordance with the mains and field frequencies. The feedback pulses, instead of inhibiting input pulses, may be injected into the divider as additional input pulses thereby reducing the division ratio.
Patent GB-539686-A (GB)
Title: Ultra-high frequency radio systems
IPC: H01Q19/12
Filed: 1940-05-17
Abstract: 539,686. Electric resonators ; directive wireless systems. STANDARD TELEPHONES & CABLES, Ltd. May 17, 1940, No. 8839. Convention date, June 2, 1939. [Classes 40 (iii) and 40 (v)] [Also in Group XXXVI] An ultra-high-frequency transmitter comprises a tank resonator combined in one structure with a reflector, based on principles described in Specification 392,962, which carries a dipole aerial, a valve being located within the structure, which may also be used for receiving. In the embodiment shown in Fig. 1, the tank resonator comprises part of a conical surface 12 carrying an adjustable condenser plate 18, and a disc 11 carrying a fixed condenser plate 20 and an oscillation-generating valve 24. The plate 20 is insulated from the disc 11, and their mutual capacity couples the resonator to the oscillator 24. The remainder of the conical surface 12 together with the outside of the disc 11 forms a reflector, and a rim 28 carrying a dipole aerial 27 is provided. The structure may be cylindrical instead of conical, Fig. 2 (not shown). The rim 28 may be omitted, and an additional disc may be supported on insulators between the disc 11 and the aerial 27, Fig. 3 (not shown). Two such systems may be assembled back-to-back in a single structure, the two adjustable condenser plates 56, Fig. 4, being integral with the same knob 59 or mounted on axially adjustable tubes, Fig. 7 (not shown). The planes of polarization of the radiation from the two aerials may be at right angles to one another, so that if the system is used in a directional beacon, the plane of polarization distinguishes one side of the beacon from the other. Fig. 5 (not shown) is a diagram of a lumped-impedance circuit equivalent to the two-resonator circuit. A cubical tank resonator may have four conical reflectors for radiating in four directions at right angles, Fig. 8 (not shown). The resonator may comprise two discs 130, Fig. 9, with the oscillator valve 136 in a central tubular casing 134 which joins the discs and may be insulative or. conductive according to the impedance which the resonator is to have. The antennae 142 are carried by insulating supports 138. The two halves of the antenna are connected with one another through a ring 97 embedded in insulating material 99. The coupling between the oscillator valve 24, Fig. 1, and dipole aerial 27 is provided by a coaxial line 88, Fig. 6, which is connected to two points 100 on opposite sides of the electrical centre of the aerial, at such a distance apart that the impedances of line and aerial are correctly related ; thus the aerial is shunt-excited. The grid 82 of the valve is connected to the coupling disc 11, and the anode 81 to a coupling transformer 84.
Patent GB-1220271-A (GB)
Title: Device for manufacturing films or ribbons from viscous plastic masses
IPC: B29C43/24
Filed: 1968-02-23
Abstract: 1,220,271. Calendering apparatus. DYNAMIT NOBEL A.G. 23 Feb., 1968 [19 July, 1967], No. 8861/68. Headings B5A and B5B. An apparatus for the manufacture of films or ribbons from viscous plastics material comprises a first, small-diameter roller and a co-operating parallel-disposed second roller, means for supplying viscous plastics material to the nip defined between the said rollers, and a third, large-diameter roller parallel-disposed and adapted to urge the first, small-diameter roller, in the direction of the nip, the roller axes being substantially horizontal. Suitably the diameter of the first, small-diameter, roller is less than one-sixth of its working-breadth, and the smalldiameter roller may have a diameter of less than 200 mm. Thus in Fig. 1, a plastic mass 4 is fed to the nip 3 between large diameter roller 1 and small-diameter roller 5, which abuts support roller 2. The film 6 formed is drawn off at the turning roller 7. In Fig. 2, the nip 3 is formed between two small-diameter rollers 5 each of which is abutted by a support roller 2. The use of a nip having at least one small diameter roller has the advantage of reducing the height of the bead formed at the nip, and enables less uniform mixing to be obtained when desired. The apparatus of Fig. 3 enables a marbling effect to be obtained by the addition of a coloured plastics granulate 15 at the nip 3 between largediameter roller 11 and small-diameter roller 14, and so incorporated in the film 13.
Patent GB-397234-A (GB)
Title: Improvements in or relating to electric fusible cutouts
IPC: H01H85/38
Filed: 1932-03-29
Abstract: 397,234. Electric cut-outs. TURNER, W. H., The Grove, Meanwood, and ISHERWOOD, W. H., 4, Caythorpe Road, both in Leeds. March 29, 1932, No. 8945. [Class 38 (i).] The casing for an enclosed fuse contains a liquid which vaporizes when the fuse blows and raises the pressure. to rupture the casing, the de-ionizing effect of the expanding, cooling and condensing vapour extinguishing the arc. If the terminals are normally at arcing distance, the elements are mechanically separated when the fuse blows. As shown in Fig. 1, the fuse wire 5 is enclosed in a casing containing liquid 8, such as water, which is introduced through hole 7. The container is provided with weakened joints or seams or has a spring-biased end to ensure bursting when a predetermined internal pressure is exceeded. When the fuse blows, the arc formed traverses and vaporizes the liquid, increasing the internal pressure so that the -container ruptures, the arc being extinguished by the de-ionizing effect of the expanding, cooling and condensing vapour. Fig. 2 shows the invention applied to cartridge type element, and Fig: 3 shows an element (Fig: 1) enclosed in a larger protecting enclosure and provided with a spring 18 to separate the elements after the fuse has blown. The cartridge shown in Fig. 2 is intended to replace the element 5 in Fig. 1, the caps of the cartridge contacting with the ends of the enclosing chamber. The walls of the cartridge may be constructed of a fragile material, the water being provided in the container of Fig. 1 only, in the cartridge only, or in both container and cartridge.
Patent GB-558467-A (GB)
Title: Improvements in and relating to wireless and like signalling systems
IPC: H03J3/12
Filed: 1942-06-30
Abstract: 558,467. Wireless signalling; frequency modulation. MULLARD RADIO VALVE CO., Ltd. BAILEY, C. E. G., and BYWATERS, G. I. A. June 30, 1942, No. 8970. [Class 40 (v)] Aural indication of the accuracy of tuning of a FM or other radio receiver is provided by imposing an audible amplitude modulation either at the receiver or at the transmitter which is heard unless the receiver is accurately tuned. As shown, the FM waves received from a transmitter 1 are reduced to an intermediate frequency at 3 and passed through a limiter 4 to a frequency discriminator 7, whence the detected signal passes to an LF stage 8. After limitation at 4, an audible note or signal 5 is applied to amplitudemodulate the intermediate frequency, whenever the press switch 6 is closed. If the intermediate frequency is slightly above or below the mean frequency of the discriminator, this note or signal is heard in the phones 9, but when the tuning is accurate the note or signal becomes inaudible. The tuning may be provided by the unsmoothed output of the high-tension supply rectifier and may be applied to the suppressor grid of the limiter 4 when a pentode is used at that stage. The system may be used at a transmitter for monitoring the transmitter frequency. Reference has been directed by the Comptroller to Specification 559,555.