baber/WOPTO huggingface dataset:
Patent GB-734298-A (GB)
Title: Improvements in means for locating a leak in the sheath of an electric cable
Inventor: HOOKER ERIC JOHN
IPC: G01M3/28
Filed: 1952-11-26
Abstract: 734,298. Locating leaks in cables. SOUTHERN UNITED TELEPHONE CABLES, Ltd. Nov. 25, 1953 [Nov. 26, 1952], No. 29955/52. Class 99 (2). A leak in the sheath of a dry core telephone cable 5 is located by charging the cable from both ends simultaneously with gas until the rate of flow of gas into each end remains constant and the pressure at both ends of the cable is the same, and then measuring the rate of inflow at each end of the cable by cutting off the gas supply to the cable and maintaining a pressure equal to the supply pressure and in a gas container 7 connected to the cable end by reducing the effective volume of that container. The' approximate distance of the leak from the ends of the cable can then be calculated, e.g. the distance from one end A of the cable is given by the formula L.VB/(VA + VB) where VA, VB represent the volume of gas flowing in unit time into the respective ends A, B of the cable, and L is the length of the cable. The apparatus may comprise a reservoir 1, provided with a pressure gauge 3, connected through a valve 2 to a supply of gas under pressure and through a valve 4 to the end of the cable 5, a manometer 6 being connected across the valve 4. The container 7 which may be in the form of a graduated glass tube and serve as a measuring device is disposed between the valve 4 and the cable, and the volume of the container is varied by raising or lowering a funnel 9 filled with mercury and connected to the lower end of the container by a flexible tube 8 ; alternatively, a bellows filled with mercury or other liquid is attached to the bottom of the container, the volume of the bellows being varied to change the level of the mercury in the container. In operation, the reservoir 1 and the gas supply serve initially for charging the cable and after a steady state of gas flow has been reached the valve 2 is closed so that the reservoir serves as a reference standard for the pressure in the tube connecting the reservoir to the cable. At that state the valve 4 also is closed and the rate of flow of gas from the container 7 to the cable is noted for the condition that the manometer shows. no difference of pressure between the reservoir 1 and the container. A number of readings of the rate of flow of gas, separated by intervals of time, are taken to ascertain that the steady state has been established, and the position of the leak is calculated when such readings cease to vary.
Patent GB-806735-A (GB)
Title: Motor control systems
IPC: H02P7/34
Filed: 1955-10-20
Abstract: 806,735. Automatic speed control. SQUARE D CO. Oct. 20, 1955 [Nov. 2, 1954], No. 29965/55. Class 38 (4). The control circuit of a speed-controlled motor in a Ward-Leonard system comprises a pair of signal receiving circuits, one controlling the generator energization and the other feeding a dummy load, to which proportions of the speed controlling signal are fed, the proportions being varied with variation of signal from a value corresponding to a predetermined speed and producing thereby an amplification of the signal output to the energization circuit. The speed of motor 10 is maintained constant at a speed predetermined by a potentiometer 38, by the control of the field 70 of a generator 20 of an A.C. driven motor-generator set 30, a deviation producing through tachometer generator 50 a signal on the grid of valve 25 which is amplified and applied to the D.C. winding 19 of a phasechanging saturable reactor 15 to produce on the grids of thyratrons 1, 2 a voltage having a phase with respect to the anode voltage which is such as to produce through winding 70 the current necessary to effect correction. The output of the tachometer generator is compared with a reference voltage from potentiometer 38 in a potential-divider across the rectified output from bridge 60. The rates of acceleration and deceleration are determined by the charge or discharge of condenser 37 through potentiometers 28 and 32 in the anode circuits of double diode 39. Power is connected through supply switches 14 and transformer 40, and start relay 8 is energized by relay 7 after an appropriate time delay to connect power to the thyratrons 1, 2. Relay 62 controlling dynamic braking through contacts 64, operates in response to the operation of start button 56 and in turn operates main start relay 66 to connect the output of generator 20 to the armature of motor 10. When relay 66 is released by stop-button 58 the generator output is regulated by the difference between the generator output and the falling motor back E.M.F., over contact 69, so that the motor circuit can be safely reclosed before the motor has stopped. Specification 806,736 is referred to.
Patent GB-464844-A (GB)
Title: Improvements in or relating to the control of centrifugal fans, pumps and the like
IPC: F04D29/46
Filed: 1935-10-30
Abstract: 464,844. Centrifugal fans. DAVIDSON & CO., Ltd., and WHITMORE, J. Oct. 30, 1935, No. 29990. [Class 110 (i)] A centrifugal fan is regulated, at all loads under the maximum, by the division of the entering air into two controllable portions ; one passes through the main inlet and the other through a secondary inlet which gives the air a rotary flow in the direction of rotation of the fan impeller. The fan shown has an impeller 2 working in the casing 1 provided with a tangential outlet 4 and main inlet 5. An annular chamber 8 is formed by a casing 7 round the main inlet 5, from which it is separated by a system of stationary vanes 6. This vaned space forms the secondary inlet and gives the entering air a whirling motion. The effective area of the main inlet 5 is varied by two dampers 9 which can be moved inwards or outwards together by means of a right and left-handed screw 11 rotated by a handle 13. Each damper may consist of two relatively movable plates of substantially crescent shape, one plate being arranged to move faster than the other by means of screw threads of different pitches. The chamber 8 may be situated partly inside the fan casing 1 so that the vanes 6 are within that casing, or the vanes may project at an angle into the casing 1 as shown in Fig. 5. The outer ends of the dampers are made to cover the openings to the chamber 8 between the shields 20, when the dampers are in their outermost position to give full access to the main entry 5 under full load conditions. The dampers may be actuated by levers operated by a screwthreaded rod, or by two endless belts 23, 23a, Fig. 7, round pulleys 19, 22 of different diameters. Semi-cylindrical shields 25, Fig. 10, may be attached to extensions on the dampers to diminish the quantity of air passing between the vanes when the main inlet 5 is closed. These shields 25, may have extensions 28 to prevent air from passing through the space behind'the shields 20 to the secondary inlet. When the fan is under full load the dampers 9 are open to the fullest extent thereby closing the secondary inlet so that all air enters by the main inlet 5. When the fan is under partial load the dampers are moved inwards, so that air enters the secondary inlet between the vanes and joins the main stream and imparts a rotary motion to it. A damper 14 in the fan outlet 4 provides for further volume regulation.
Patent GB-908787-A (GB)
Title: Penicillins
Inventor: HOLMS WILLIAM HENRY
IPC: C07D499/00
Filed: 1960-08-31
Abstract: Relates to penicillins of the formula <FORM:0908787/IV (b)/1> wherein R1, R2 and R3, which may be the same or different, stand for alkyl or alkenyl radicals, optionally substituted, or wherein R1 stands for a radical of the formula R4(CH2)n wherein R4 stands for a branched-chain alkyl or alkenyl radical, optionally substituted, and wherein n stands for an integer from 0 to 6, R2 stands for hydrogen or an alkyl or alkenyl radical, optionally substituted, and R3 stands for hydrogen, or wherein R1 and R2 are joined together with the adjacent carbon atom to form a carbocylic radical, optionally substituted, and R3 stands for hydrogen or an alkyl or alkenyl radical, optionally substituted, and the salts thereof.  The penicillins may be prepared by acylation of 6-aminopenicillanic acid with an appropriate acylating agent.  Examples described the production of t-butyl-and 1,1,3,3 - tetramethyl - n - butyl - penicillin. Specification 876,516 and 878,233 are referred to.ALSO:Pharmaceutical compositions comprise an inert non-toxic diluent or carrier having admixed therewith a penicillin of the formula <FORM:0908787/VI/1> wherein R1, R2 and R3, which may be the same or different, stand for alkyl or alkenyl radicals, optionally substituted, or wherein R1 stands for a radical of the formula R4(CH2)n, wherein R4 stands for a branched-chain alkyl or alkenyl radical, optionally substituted, and wherein n stands for an integer from 0 to 6, R2 stands for hydrogen or an alkyl or alkenyl radical, optionally substituted, and R3 stands for hydrogen, or wherein R1 and R2 are joined together with the adjacent carbon atom to form a carbocyclic radical, optionally substituted, and R3 stands for hydrogen or an alkyl or alkenyl radical, optionally substituted, or a salt thereof, such as t - butyl- or 1,1,3,3 - tetramethyl - n - butyl-penicillin.  The compositions may also contain a known penicillin such as benzyl-, phenoxy-methyl- or a -phenoxy-ethyl-penicillin, and may be in the form of tablets, capsules, dispersible powders, aqueous or non-aqueous solutions, suspensions or emulsions, or ointments.  Specifications 876,516 and 878,233 are referred to.
Patent GB-621403-A (GB)
Title: Improvements relating to boxes and like packages
IPC: B65D5/02
Filed: 1946-10-08
Abstract: 621,403. Boxes; packing. CHRISTENSSONS MASKINER & PATENTER AKTIEBOLAGET. Oct. 8, 1946, No. 30013. Convention date, Nov. 13, 1940. [Classes 18, 66 and 94(i)] A cardboard or like box with an inner lining 1 protruding beyond the ends of flaps 3, 4, 5, 6 has the flaps 3, 4, 5 connected together at the corners and the flaps 3, 5 scored diagonally at 7, 8 so that the connected flaps can be folded inwardly as shown in Fig. 2 and the projecting portion of the lining imprisoned between the edge of flap 4 and the free flap 6 when the latter is pasted down. The flaps 3, 4 may have recesses 9, 10 to facilitate folding. The Specification as open to inspection under Sect. 91 comprises also a centrally disposed line of perforations on the flap 6 to facilitate opening of the box and to provide a tab that can be inserted in a slit in flap 4 when the package is to be closed again. This subject-matter does not appear in the Specification as accepted.
Patent GB-414251-A (GB)
Title: Improvements in or relating to thermionic valve circuit arrangements
IPC: H03F3/02
Filed: 1933-10-30
Abstract: 414,251. Thermionic valve circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London.-(Assignees of Wolff, I. ; 41, W. Walnut Avenue, Merchantville, New Jersey, U.S.A.) Oct. 30, 1933, No. 30080. Convention date, Oct. 29, 1932. [Class 40 (v).] A resistance material the resistance of which is proportional to CI-a (where I is the current and C and a are constants), e.g. the material known under the Registered Trade Mark "Thyrite" is employed in intervalve couplings to compensate for the curvature of valve characteristics. It may be employed as a simple coupling resistance or in a coupling network as shown in Fig. 5 in which 7 and 9 are "Thyrite" elements. The battery 11 which may be omitted is for modifying the initial value of the element 9. In the coupling network shown in Fig. 6 the elements 7, 13 are initially biassed in opposite directions by a battery 15. In a further modification a "Thyrite" element forms part of a shunt across the secondary of an intervalve transformer and may be polarized by the biassing battery. Any of the networks described may be used in conjunction with transformers.
Patent GB-860513-A (GB)
Title: Improvements relating to irradiation equipment
Inventor: CROWLEY-MILLING MICHAEL CROWLE
IPC: B01J19/08
Filed: 1957-09-25
Abstract: 860,513. Irradiation equipment. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Sept. '8, 1958 [Sept. 25, 1957], No. 30095/57. Class 98(1)  Portable irradiation equipment comprises an irradiation source, a zone of treatment in the path of the beam of radiation, a shielding structure including water disposed around and underneath said treatment zone, .and mechanical means for passing a continuous supply of articles or material through said zone. The irradiation source may be a linear accelerator or a van der Graaff generator, for producing high-speed electrons, or a radioactive or X-ray source, and is shown as housed in a wheeled box trailer 1. The source 2 is mounted so as to project an electron beam . downwards through a spreading device 3 and so -irradiate -a, supply of articles, for example potatoes, carried through the treatment zone on a horizontal conveyer belt 4. The said zone is screened by surrounding water tanks 5, with a further tank 8 below. The water may at the same time form part of a circulatory system for cooling the generator. The control desk and shelter 11, 12 may also be loused in the trailer during transport. Fig. 1 (not shown) illustrates how the equipment is set up for operation in the field, and surrounded by a fence, within which a photoelectric detecting device .may be .used to switch off the power should someone enter the enclosure.
Patent GB-358281-A (GB)
Title: Improvements in or relating to drawing boards
IPC: B43L13/04
Filed: 1930-10-08
Abstract: 358,281. Draughting-machines. DÍRFELDT, A., 78, Bahnhofstrasse, Zuffenhausen, near Stuttgart, Germany. Oct. 8, 1930, No. 30120. [Class 97 (iii).] A draughting- machine comprising a drawing-board with an endless crossed cord serving as a parallel guide for a ruler is characterized in that the horizontal arm of a bow is loosely mounted in the ruler, the ends of the bow engaging with holders attached to the cord. As shown, the draughting-machine comprises a drawing board a connected to a board b by battens c. Between the boards an endless crossed cord f runs on the pulleys e in the corners so that two opposite sections of the cord are parallel to the edges of the board a. A bow i is loosely mounted in ruler k and its ends are attached to the holders g on the cord f. The cord f has a tensioning device comprising a bow o in which a screw spindle p provided with a handle and carrying a slide u is rotatable. A resilient arm q connected to the slide u carries a pulley s engaging a diagonal portion of the cord f. The lower board b may have battens n, and may be cut-out. The cord f may be of wire, hemp, flax or gut.
Patent GB-869206-A (GB)
Title: Valve refacing apparatus
IPC: B23B5/06
Filed: 1958-09-20
Abstract: 869,206. Portable turning apparatus. HUNGER, L. Sept. 20, 1958, No. 30138/58. Class 83 (3). A device for facing poppet valves comprises a tool-holder supporting a tool 28, Fig. 1, and means for supporting the valve 14 including a slidable socket member 16 having a recess 15 for locating the end of the valve stem and an adjustable centring member 19 which is adapted to engage the valve stem adjacent the head. A collar 12 forming part of a face-plate drive carries a set-screw which is secured to the valve and the face plate 11 is driven by an electric motor (not shown). The socket 16 is slidable against the pressure of a spring 17 and the centring member 19 has a weighted handle 24 which closes the radial jaws 23, Fig. 2, of a centre rest for the head end of the valve. The tool 28 is clamped to a slide 48 guided in a rotatably adjusted holder with an adjusting pin 31 for the main angles and intermediate positions. The tool may be fed to turn the valve fan by hand or automatically. A shaft 37, Fig. 1, rotated from the driving motor, passes through an extension of the longitudinally adjustable tool-holder slide 8 and rotates a worm and wheel 38, 39, Fig. 2. The worm-wheel is secured to a spindle 40 journalled in the tool rest, the other end of which is provided with a pinion 41 engaging a gear 42 loosely mounted on a further parallel spindle 43. The gear 42 may be secured to this spindle by a clamping screw 45 to give automatic feed through a pinion cut on the opposite end of the spindle and rack teeth on the tool carrier 48. Hand feed is effected through the knob 46 when automatic feed is released.
Patent GB-316061-A (GB)
Title: Improvements in and relating to hydraulic actuating devices for aircrafts
IPC: B64C13/00
Filed: 1928-10-18
Abstract: 316,061. Giffen, R. M. Oct. 18, 1928. Steering, balancing, and regulating altitude.- The controls of an aircraft are operated by double-acting hydraulic transmission involving a plurality of cylinders with centrally arranged pistons which are moved by the control stick of the operator to force the liquid along tubes to corresponding cylinders having pistons connected to the ailerons, landing wheels, rudders, or the like. As shown, centrally placed pistons 8 are connected by rods to a crosshead 11, Figs. 3 and 4, having a shaped aperture for the control stick 1. The crosshead is provided with four pairs of ears carrying pins 12 which are capable of sliding in the slotted end 10 of the piston rods 9 so that movement in one direction operates the pistons of one pair of cylinders 4, 6 and movement at right angles to this operates the other pair 5, 7. Cylinders 13, 15, are coupled up with corresponding ailerons 14, 16, a cylinder 17 with the steering anns 18 of the front wheels, and a cylinder 26 with rear elevators 27. The cylinders 5, 7 are connected, by pipes 28, 29 respectively with the cylinder 26 and the cylinders 6, 8 by pires 20, 23 with the cylinder 13 and by pipes 25, 24 with the cylinder 15. A cylinder 31, by means of a three-way valve 33 and piston operated from a hand wheel 35, maintains the required pressure in the pipes. In operation, by moving the control stick, for example, in the direction towards the ailercn 14, liquid is forced along the pipe 20 into the cylinder 13 and acts on the piston to lift the aileron. Liquid is thereby also forced out of the cylinder into the pipe 23 to force the piston of the cylinder 4 in the direction in which the control stick moves. Thereby also liquid is forced out of the cylinder 4 into the pipe 24 and cylinder 15. The piston of the cylinder 15 is also moved to lower the aileron 16. Simultaneously, the fluid passes from the cylinder 6 by the pipe 21 to operate the piston of the cylinder 17 and the road wheels 19.
Patent GB-1511368-A (GB)
Title: Optical densitometer
IPC: G01N21/59
Filed: 1975-07-18
Abstract: 1511368 Optical densitometer SHIMADZY SEISAKUSHO Ltd 18 July 1975 [21 Aug 1974] 30240/75 Heading G1A A spot developed on a thin-layer chromatographic plate 4 is scanned in a zig-zag pattern by mono-chromatic light and an electrical signal corresponding to light reflected by the spot is produced by a photo-multiplier PMR, the signal then being compensated for scattering effects by a function generator 8 to provide an output proportional to the quantity of a particular component substance of the spot. The spot may alternatively be one developed on filter paper by paper chromatography or on an electro-phoretic supporting medium and a second photo-multiplier PMT receiving transmitted light may be selectively energized by switch SWP. Ultra-violet or visible light from lamps L is directed via a rotating chopper 1 to mono-chromators MR and MS which emit light beams of different wavelengths #R, #S; Plate 4 is mounted on a support (10), Fig. 3, (not shown) which reciprocates to the direction "Y" while being steadily advanced in the "Z" direction. Switches SWS, SWR open and close alternatively in synchronism with the chopper 1 so that signals corresponding to the light beam #S pass only to the function generator 8 and those corresponding to #R only to the differential amplifier 7. Amplifier 7 controls the negative high voltage applied to the photo-multiplier so that its output V R  is maintained, when receiving light at wavelength #R, at a reference level E. Errors due to optical defects in the plate 4 are common to both wavelengths and are thereby compensated. Function generator 8 receiving signals corresponding to absorbance or reflection absorbance from log amplifier 5 comprises a series of voltage producing circuits (61, 62, &c.,) Fig. 2, (not shown), variable current sources (70, 71 &c.), and an adder (80). The voltage producing circuits are sequentially actuated by the input signal to produce an output/ input relationship defined by a series of linked straight lines Fig. 6(b), (not shown) approximating to a Kubelka-Munk's theoretical curve. A switch SWI gauged to the reciprocal movement "Y" of the plate 4 passes output signals corresponding to a particular spot to an integrator 9 or if switch S5 is closed and S6 open direct to a recorder, indicator or printer R. The integrator sums the quantities determined on each scan to give the total quantity of component substance per spot. The scanning beam is preferably of square crosssection with an area less than one tenth of the spot area, the square having a side equal to the scanning pitch in the Z direction of the scan so that the spot area is scanned twice by the beam Fig. 4, (not shown).
Patent GB-1094477-A (GB)
Title: Improvements in or relating to couplings
Inventor: SHAW JOHN
IPC: F16L43/02
Filed: 1963-08-01
Abstract: 1,094,477. Making elbow bends. TUNGUM CO. Ltd. July 29, 1964 [Aug. 1, 1963], No. 30532/63. Heading B3A. [Also in Division F2] A pipe bend or elbow comprises an integral length of bent tube one end of which is formed for connection of a flexible hose or the like and the other end of which is of nipple-like form to provide a joint face. The one end carries a series of grooves or serrations 2 and the other end is upset or " cold-headed " to provide a shoulder 3 to receive a gland nut 6 and a joint face 5 which is then machined and polished. Preferably the nipple end is formed before the tube is bent into its elbow shape.
Patent GB-502706-A (GB)
Title: Improvements relating to automatic fine tuning in radio receivers
IPC: H03J7/14
Filed: 1937-11-08
Abstract: 502,706. Automatic tuning correction. COLE, Ltd., E. K., MARTIN, A. W., and HUNT, H. Nov. 8, 1937, No. 30548. [Class 40 (v)] An automatic tuning correction system comprises a valve VI acting as a variable resist. ance to vary the current through an inductance 3 in dependence on a control voltage derived from a known discriminator network 7, the coil 3 being coupled to a second coil in the circuit whose frequency is to be controlled so as to vary the effective inductance of the second coil, the arrangement being such that the valve V1 also operates as a low frequency amplifier, deriving its low-frequency input over condenser 10 the output passing over condenser 11. The resistance 9 maintains the cathode potential of VI substantially constant despite variations in impedance of the valve. The valve V1 is preferably a multi-grid valve the coil 3 being connected in circuit with one of the grids other than the control grid while the L.F. output is taken from the anode circuit ; this prevents low-frequency signals from affecting the A.F.C. action, Fig. 2 (not shown). Or the control valve may form the hexode portion of a triodehexode, the triode section being the local oscillator of the receiver.