baber/WOPTO huggingface dataset:
Patent GB-703329-A (GB)
Title: Improvements in or relating to automatic control systems such as servo systems
IPC: G05B1/02
Filed: 1949-01-03
Abstract: 703,329. Control of A.C. motors. HEMING- WAY, A. V. Jan. 3, 1950 [Jan. 3. 1949], No. 114/49. Class 38(3) [Also in Group XXXVIII] In an automatic follow-up control system wherein an input shaft is rotatable through discrete intervals to generate trains of discrete electrical pulses representing its angular position which are compared with similar trains of discrete pulses representing the angular position of the output shaft to derive an error signal controlling a servomotor to drive the output shaft through discrete intervals into positional correspondence with the input shaft, there is provided a device which, when the error signal reaches zero, generates a direct current to magnetize one of the operative motor windings to saturation, thereby generating eddy currents in the rotor which damp oscillation or hunting of the output shaft about the position of correspondence. In Fig. 1 trains of discontinuous discrete electrical pulses digitally representing the angular positions # 1  and # 0  of an input shaft (not shown) and an output shaft 2 at discrete intervals of time (unit change in the angular positions of each shaft being represented by a unit digital change in the coded pulse signal) are subtracted in known manner in a unit 1 to produce a digital error signal e representing (# 1 -# 0 ,) which is converted in known manner to a unidirectional voltage analogous in sign and magnitude to the digital error signal, changing in fixed steps with variations in the value of e but remaining constant over the intervals between successive digital error signals. Such voltage is fed to a mains energized magnetic amplifier 4 producing an A.C. representing in magnitude and phase sense the magnitude and polarity of the unidirectional voltage to energize winding 5 of servomotor 3 having its winding 6 energized in quadrature through transformer 7 and condenser 6a, so as to drive the output shaft into positional correspondence with the input shaft. The digital error signal # is bridge rectified at 10, Fig. 2, to a negative voltage which normally biases a triode V, to cut-off, but releases the triode when the error signal falls to zero, and the resultant unidirectional anode voltage drop, after amplification at 8 is injected across condenser 6a to saturate the quadrature winding 6 of the motor at zero error signal, whereby the eddy currents generated in the rotor effectively damp the motor rotation and disable amplifier 4, so that the output shaft is arrested in correspondence with the input shaft and hunting is prevented. Rotation of the input shaft out of correspondence develops an error signal which biases the triode to cut-off and removes the damping until the servomotor once more reduces the error to zero.
Patent GB-575170-A (GB)
Title: Improvements connected with cranes, hoists and the like
IPC: B66D1/50
Filed: 1944-01-04
Abstract: 575,170. Winches. PEARSON, J. B. Jan. 4, 1944, No. 142. [Class 78 (v)] Means for stopping the driving motor of a winch drum when the rope leaves the drum groove for any reason, such as slackening of the rope when the load reaches its destination, comprises a cross-bar C extending the length of the drum D parallel to its axis. The bar C is mounted on two balanced end levers B pivoted at A.and coupled by a link E to the arm F of a micro switch G controlling the electric motor, the switch being thus operated by the pressure of the off-coming rope on the bar C. Specification 551,032, [Group XXXVII], is referred to.
Patent GB-537280-A (GB)
Title: Improvements relating to coal-cutting machines
IPC: E21C35/20
Filed: 1940-01-03
Abstract: 537,280. Coat-cutting machines; conveyers. ANDERSON, A., and ANDERSON, BOYES & CO., Ltd. Jan. 3, 1940, No. 197. [Class 68 (i)] [Also in Group XXX] A coal-cutting machine is provided with means for removing cuttings from the cutterchain comprising a rotary bladed impeller and a conveyer screw so arranged that the impeller sweeps the cuttings upwardly into the con-  veyer screw which discharges them rearwardly and is angularly adjustable to vary the direction of discharge. In Fig. 1, a housing comprising components 7, 7a, 8, 9, 9a, is attached to the rear of the coal-cutting machine 1, and contains a rotary impeller 2 which sweeps cuttings upwardly and delivers them through opening 13 to a screw conveyer 3 which delivers rearwardly. The impeller shaft 5 is driven from the machine through gearing 14 and drives the screw 3 through gearing 15. The housing component 8 is angularly adjustable about shaft 5 to vary the direction of discharge of screw 3. The housing may contain gearing adapted to maintain the direction of rotation of the impeller 2 and screw 3 when the machine motor is reversed, or such mechanism may be omitted, and the impeller may then be provided with pivoted blades 2b, Fig. 4, adapted to swing so that the impeller functions in either direction of rotation, the screw 3 being replaced by one of opposite hand. Specification 435,799 is referred to.
Patent GB-1438611-A (GB)
Title: Rotary tubular furnace with cooling tubes
IPC: F27B7/40
Filed: 1974-01-03
Abstract: 1438611 Planetary coolers for rotary furnaces FIVES-CAIL BABCOCK 3 Jan 1974 [3 Jan 1973] 00226/74 Heading F4B In a rotary furnace 12 having planetary cooling tubes 10 each connected to the furnace by a gas-tight feed tube the latter includes a bellows expansion sleeve 36 attached both to the furnace and to the cooling tube and a short tube 26 formed of or lined with refractory material and attached either to the furnace or to the cooling tube. As shown, the tube 26 has a flange 28 bolted to the flange 22 of a short cylindrical portion 20 of the cooling tube the other end being enclosed by a ring 32 of heat resisting steel clamped between flanges 30 and 34. The bellows sleeve 36 comprises two bellows elements 38 connected by a collar 40 and welded to flanges 28 and 34. The entry end of the cooling tube has a frustoconical section facilitating passage of material away from said entry end. The aperture 24 is lined with wear elements 42 of heat resisting steel. The feed tube is inclined in the downstream direction relative to the axis of aperture 24. In a modification (Figs. 3 and 4) the tube 26 is fixed at the furnace end and in another modification (Fig. 5) the feed tube is disposed at right angles to the furnace axis.
Patent GB-1136571-A (GB)
Title: Improvements in electromagnetic detection systems
IPC: G01S13/58
Filed: 1966-01-04
Abstract: 1,136,571. Radar. COMPAGNIE FRANCAISE THOMSON HOUSTON - HOTCHKISS BRANDT. 4 Jan., 1966 [8 Jan., 1965], No. 355/66. Heading H4D. In a ranging and velocity-measuring radar a transmitter is phase modulated by a coding signal and the coding signal consists of a symmetrical square wave ("course") code g(o), and a disconnectable pseudo-random ("fine"), code F(o) generated by respective units 30, 31; the receiver includes a demodulator 6 fed from a multiplier connected to the coarse code generator and a delayed output, disconnectable in conjunction with the above disconnection, of the fine code generator, and the receiver also includes a demodulator 7 fed via a frequency doubler 5 with the coarse code; the final demodulated signal is fed via a lowfrequency amplifier 8 to audible and/or visual display means; and the transmitter and receiver have a common orientable aerial 10. The fine code generator is a shift register Fig. 2 (c) (not shown), and the coarse code produces 0 or 180 degrees R.F. carrier phase shift, the period of the coarse code square wave being four times that corresponding to maximum range. The transmitter incorporates a three-port circulator and a diode switch shunting a guide forming one of the circulator arms: when the diode is rendered conductive the R.F. phase is shifted by 180 degrees, Fig. 4 (not shown). In the R.F. "head" the echo signal is fed together with a counterpart of the unmodulated transmitter carrier to a coherent phase demodulator and the video output therefrom is fed to demodulator 6, which consists of a multiplier and band-pass filter, to give a sine wave of amplitude varying as where R is target range and R max  is maximum range, and of phase proportional to R/2R max ; the demodulator 7 consists of a multiplier and a Doppler-shift filter, Fig. 5 (not shown). A frequency meter 9, 9<SP>1</SP> gives target velocity which alternatively may be judged audibly from loudspeaker 112. The signal is a maximum when the delay-tapping 323 corresponds to target range. It is stated that the demodulation arrangement compensates for the attenuation of echo signal with distance. In operation the area is first surveyed by opening switches 321, 322 and a target presence is detected by its Doppler frequency; switches 321, 322 are then closed and selector 323 operated for maximum audible or visual output to afford range.
Patent GB-988844-A (GB)
Title: Hydraulically actuated shovel machines
IPC: E02F3/43
Filed: 1964-01-06
Abstract: 988,844. Shovelling machines. POCLAIN. Jan. 6, 1964 [Jan. 14, 1963], No. 510/64. Heading E1F. In an hydraulically actuated shovel excavator a jack controlled, vertically swingable jib 2 is pivotally mounted on a chassis or on a turntable 1 on the chassis of the excavator and pivotally carries an intermediate arm 4 that is connected to the excavator shovel by a parallelogram framework defined by pivot points 9, 10, 15, 14 relative movement between the parallelogram and the arm 4 being controlled by a jack 17 that extends between the jib and the parallelogram. A locking jack 20 can extend either between the arms 2, 4 or the arm 4 and the parallelogram.
Patent GB-1011704-A (GB)
Title: Movable wall coke oven
IPC: C10B15/00
Filed: 1963-01-04
Abstract: <PICT:1011704/C4-C5/1> <PICT:1011704/C4-C5/2> A coke-oven battery with a plurality of vertical coking chambers 75 is constructed of a number of sections 7, each section comprising either one or two half-chambers 75 and heating flues 14 and being movable towards and away from each other into a position where they combine to form coking chambers and a position where they are separated to enable coke to be discharged through openings at the base of the chambers. The sections 7 are composed of brickwork enclosed in a metal framework formed by vertical side plates 9 (Fig. 4) and top and bottom plates 10 and 8 (Fig. 3), a seal between adjacent sections 7 being obtained by gaskets carried by inverted U-shaped members 58 of H-cross-section extending on both sides of the sections and across the top and compressed between flanges 17 (Fig. 4) and 16 (Fig. 3), projecting from the plates 9 and 10 respectively, and by flanges projecting downwardly from the plates 8 into water troughs 18 surrounding the openings in the base of the chambers.  A supporting framework for the sections comprises vertical and horizontal stanchions 1 and 5 (Figs. 4 and 3), the sections being maintained in position by bolts threaded through the beams 1 and 5 and urging leaf springs 13 against the plates 9 and 10 as shown.  Each section is supported at its base by a horizontal beam 3 (Fig. 3), carrying at each end rollers 6, the arrangement being such that the sections can be moved along a track formed by two spaced parallel beams 2. The openings at the top of the coking chambers are closed by plugs 60 carried by the top portions of the members 58 and having charging openings 62 extending therethrough.  Each opening at the base of the chambers is closed during coking by a plug 65 supported by a beam 66 mounted on a truck 84 for movement along the rails 72 of a carriage 96 which normally supports all the plugs 65 in a raised position but which can be lowered to allow the removal of the plugs 65 and troughs 18 during discharge of the chambers.  The plugs 65 are preferably sealed against the troughs 18 by flexible hoses through which water is circulated.  The sections 7 and the trucks carrying the plugs 65 are interconnected for simultaneous movement by means of screw-jacks and movement of the carriage 96 may be co-ordinated with the movement of a quenching car for receiving the discharged coke.  In the battery shown in Fig. 3 the central section 71 is not moved, the sections on either side being moved away from the central section.  U.S.A. Specification 2,490,090 is referred to.
Patent GB-586515-A (GB)
Title: Improvements in ultra high frequency transmitting apparatus
IPC: H03F3/54
Filed: 1944-01-12
Abstract: 586,515. Frequency modulation. STANDARD TELEPHONES & CABLES, Ltd., and TAYLOR, F. H. Jan. 12, 1944, No. 644. [Classes 39 (i), 40 (iii) and 40 (v)] An ultra-high-frequency generator employs a triode valve with its grid earthed and with resonant means associated with its anode and cathode circuits respectively ; and the generator frequency is cyclically varied by varying the tuning of one of the resonant means, preferably that associated with the anode. The generator may be-employed in altimeter apparatus. The grid 3 of the valve V, which may be of the kind described in Specification 585,457 is connected to an external ring 4 which is capacity coupled to the ends of coaxial resonators RA, RC associated respectively with the anode 5 and cathode 1. The resonators are bent to produce a compact instrument and are respectively a half-wave and a quarter-wave long. Anode high-tension is fed through a choke L2 and resistance R1 to a point on a coil L1 comprising a few turns of copper tube. The choke L2 and resistance R1 are situated within a branch H of the resonator, and a disc 12 provides a capacity short circuit to the end plate of the branch. The resonator encloses a series of sector-shaped condenser vanes A ... E shaped as shown in Fig. 2, of which A, B, E are stationary and C, D are driven by a shaft S and motor M. The vanes C, D comprise opposite ends of a metal block CV, the rim of which is cut away to resemble a pulley. For initial adjustment, the vanes A may be rotated by an external knurled ring, and the vanes E may be similarly adjusted in an axial direction. As the shaft S rotates, the generated frequency varies through two or more complete cycles, depending on the number and angular extent of the vanes. The cathode resonator is shorted at its outer end F and has a tubular inner member T connected to the cathode and enclosing the leads from LT to the heater 2, condensers being connected between each side of the supply and each end of the tube T. Energy is taken from the cathode resonator by bent coaxial branch lines 01 or 02 providing different values of output impedance.
Patent GB-537925-A (GB)
Title: Improvements in plasticizers
IPC: C08K5/11
Filed: 1940-01-11
Abstract: 537,925. Plasticizers. HIGGINS, E. Jan. 11, 1940, No. 665. Convention date, Jan. 21, 1939. [Classes 22 and 70] Chlorinated rubber is plasticized by means of alkyl esters of tri-carballylic acid or substitution products thereof. The use of the plasticizer is particularly advantageous when it is desired to incorporate pigments in the chlorinated rubber as no volatile liquid solvent is required, the ester acting as solvent as well as plasticizer. An example is given of the use of tributyltricarballylate. The product may be extruded to form films, rods, tubes or the like. Substitution products include the esters formed by combination of dihydric or polyhydric alcohols such as glycerol with tricarballylic acid. The Specification as open to inspection under Sect. 91 states that the esters may also be used for plasticizing shellac. This subject-matter does not appear in the Specification as accepted.
Patent GB-1008021-A (GB)
Title: Friction welding and brazing
IPC: B23K35/00
Filed: 1962-03-29
Abstract: 1,008,021. Welding by pressure; jointing. AMERICAN MACHINE & FOUNDRY CO. March 29, 1962 [March 29, 1961], No. 7404/62. Headings B3R and B3V. [Also in Division C1] In a method of joining two workpieces of different materials by friction heating, a layer of material soluble in the material of both workpieces is formed on a surface of a first workpiece and the two workpieces are rotated relative to each other and forced together, the relative rotation being then stopped. The joint surface of the first workpiece is degreased and sand blasted and the layer formed by plating, flame coating, by rolling foil on to the surface, or by welding a thin wafer to the surface. The layer is between 1 and 25 mm. thick. The method may be used for joining aluminium to steel, stainless steel to molybdenum, zirconium to steel or stainless steel, and nickel-copper alloys to aluminium. The method may also be used for joining ceramics such as aluminium oxide to metals. The layer material used may be silver, nickel or copper. The layer must be soluble in both the workpieces to be formed, and the resulting joint may comprise alloys of each workpiece and the layer with or without the presence of an intermediary layer of pure layer material, or the layer may merely wet the two workpiece faces without fusing therewith. Specifications 1,008,022 and 1,008,023 are referred to.
Patent GB-408762-A (GB)
Title: Improvements relating to thread spool or bobbin holders for embrodiery and like sewing machines
IPC: D05B43/00
Filed: 1933-01-09
Abstract: 408,762. Sewing-machines. NEW ART EMBROIDERY, Ltd., 309, Grand Buildings, Trafalgar Square, London, HUTCHINSON, O. G., 5, Arundel Terrace, Brighton, Sussex, and ARMSTRONG, E. W., 16, Woodcot Avenue, Belfast, Northern Ireland. Jan. 9, 1933, No. 719. [Class 112.] A thread spool holder for an embroidery or like sewing machine employing a number of different coloured threads comprises a bracket with a thread guide and one or more spool holding posts directed towards the guide and pointing slightly downwards. The bracket 10 is fixed to the machine head and has holes 4, 5 for the needle and presser bars. It has two thread guiding eyes 7, 8. Arms 9 support an arcuate member 11 to which are bolted the posts 12 at a slight downward angle to the horizontal. Each post has a spool-retaining spring 14. A plate 17 is provided for positioning the spools 6 on the posts.
Patent GB-1108244-A (GB)
Title: Lens holding assembly
Inventor: REDERER CARL GENE
IPC: G03B3/02
Filed: 1967-01-05
Abstract: 1,108,244. Lens holders. EASTMAN KODAK CO. Jan. 5, 1967 [Jan. 7, 1966J, No. 742/67. Heading G2J. A lens holder, for example for the front focusing component of a zoom assembly, comprises an externally screw-threaded lens mount 2, a housing 3 for receiving the mount 2, a plurality of arcuately spaced inserts 10, 11, 21 located between the mount 2 and the housing 3 and having screw-threads which co-operate with the screw-threads on the mount 2, and resilient means positioned between the housing 3 and one insert 21 for holding the insert against the mount 2 and the mount 2 against the other inserts 10, 11 which are fixed to the housing. The resilient means comprises a leaf spring 16 secured to the housing 3. The insert 21 is coupled with the spring 16 by means of a lug 23 so as to lock the insert against unintentional arcuate movement. One end of the spring engages any one of a series of arcuately spaced slots 17 in the housing 3 by means of which the arcuate position of the insert may be adjusted.
Patent GB-1206232-A (GB)
Title: Improvements in or relating to sulphanilamide derivatives
IPC: C07D239/60
Filed: 1968-01-05
Abstract: 1,206,232. Sulphanilamide derivatives. J. R. GEIGY A.G. 5 Jan., 1968 [6 Jan., 1967], No. 745/68. Heading C2C. Compounds (I) (including salts with organic and inorganic bases) wherein R 1  and R 2  signify hydrogen or cyclopropyl (one of R 1  and R 2  being cyclopropyl) and R 3  signifies an alkyl or alkoxy group, are prepared by reducing a compound related to that illustrated above wherein in place of R 1  and R 2  are the groups R<SP>1</SP> 1  and R<SP>1</SP> 2  signifying cyclopropyl or alkylthio (one of R<SP>1</SP> 1  and R<SP>1</SP> 2  being cyclopropyl), R 3  is as defined above and in place of the -NH 2  group is the group -X signifying the amino group or a nitrogencontaining group which is convertible into the amino group. 6 - Cyclopropyl - 5 - methoxy - 2 - mercapto - 4 - pyrimidinol, obtained by refluxing α-methoxy- #-oxo-cyclopropane propionic acid ethyl ester and thiourea in ethanol in the presence of sodium, is converted to 6-cyclopropyl-5 -methoxy 2 - methylthio - 4 - pyrimidinol utilizing methyl iodide and sodium hydroxide; the 4-pyrimidinol is converted to the corresponding 4- chloropyrimidine by heating with phosphorus oxychloride, which in turn is converted to N<SP>1</SP> - (6 - cyclopropyl - 5 - methoxy - 2 - methylthio- 4 - pyrimidinyl) - sulphanilamide utilizing the sodium salt of sulphanilamide in the presence of trimethylamine, dimethyl sulphoxide and dimethyl formamide. Pharmaceutical preparations suitable for the treatment of virus diseases contain as active ingredient compounds (I); administration is orally or parenterally.
Patent GB-1025466-A (GB)
Title: Improvements in sound source locating systems
IPC: G01S7/00
Filed: 1963-01-07
Abstract: 1,025,466. Determining direction acoustically. CSF-COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. Jan. 7, 1963 [Jan. 12, 1962], No. 767/63. Heading H4D. A system for determining the direction of a sound source, e.g. a submarine, by means of a plurality of hydrophones mounted on the hull of a ship and making use of the different times of arrival of a sound wave at the various hydrophones comprises, as shown, thirty-six hydrophones H 1  ... H 36  producing signals clipped at upper and lower levels by clippers E 1  ... E 36 , the output of each clipper being connected to one hundred AND-circuits. These AND-circuits are each designated by two numerals, e.g. the AND-circuits associated with clipper E 1  have designations 1, 1 ... 1, 100 and those associated with clipper E 36  have designations 36, 1 ... 36, 100. The AND-circuits each have a further input d 1  ... d 100  connected, respectively, to pulse trains t 1  ... t 100  derived from a clock O, D comprising a generator O and a frequency divider D. These trains have a recurrence frequency of 1 kc.s and are stepped sequentially with respect to one another by 10 Ás. Each AND-circuit produces a signal in its output a when a signal from its clipper E coincides with a signal from the clock O, D. One hundred and twenty bearing, directions are chosen covering 360 degrees in 3-degree intervals and for each of these directions the output a of a particular AND-circuit associated with each hydrophone H will produce a signal. The thirty-six outputs a associated with each bearing direction are connected to one hundred and twenty counters C 1  ... C 120  through junction boxes G a1  ... G a120 . Thus a sound source located on any one of the one hundred and twenty directions will cause the counter C associated with that direction to count up to thirty-six. An integrator F 1  ... F 120  associated with each counter C 1  ... C 120  sums up the pulses for a given time interval, this summation being supplied to a threshold device S 1  ... S 120  such that when the threshold is exceeded the bearing direction is marked on a graph.
Patent GB-1183921-A (GB)
Title: Improvements relating to Wing Pivots for Aircraft having Variable Sweep-back Wings
Inventor: RICHARDSON JAMES PAUL
IPC: B64C3/40
Filed: 1967-01-06
Abstract: 1,183,921. Aircraft wing pivots. BRITISH AIRCRAFT CORP. Ltd. 5 April, 1968 [6 Jan., 1967], No. 870/67. Headings B7G and B7W. [Also in Division E2] An aircraft wing pivot assembly comprises a hollow spool 2 having external surfaces 3, 4 for rotatably supporting the root of a wing (shown as lugs 18a and 18b), and pin 5 within the spool to secure it to a pair of vertically spaced members 1a, 1b of the aircraft. The surfaces 3, 4 may be tapered and fitted with tapered bushes 21, 22 secured on by nuts 23, 24. The normal bearing surfaces are between members 19 and 21 and between members 20 and 22. Should these stick, then motion can take place between surfaces 14 and 16 and between surfaces 15 and 17. Out-of-plane loads are transmitted from the wing to the fuselage by surfaces 28, 29 on the wing sliding on bearings 26,. 27 on the aircraft structure. The clearances at these latter surfaces is adjusted by shims 30, 31. The clearances at bearings 19 and 20 can be reduced by driving the bushes 21 and 22 on to the spool 2.