baber/WOPTO huggingface dataset:
Patent GB-924134-A (GB)
Title: Improvements in or relating to the control of the speed of a shaft, particularly for tape transport mechanisms for magnetic tape recorders
Inventor: NAMENYI-KATZ LASZLO
IPC: G05D15/01
Filed: 1958-05-02
Abstract: 924,134. Automatic speed control. EPSYLON RESEARCH & DEVELOPMENT CO. Ltd. May 1, 1959 [May 2, 1958], No. 14122/58. Class 38 (4). A D.C. motor 2 of the split-field type drives a capstan 1, forming part of the tape transport mechanism, for a magnetic tape recorder, the motor being coupled to a D.C. tachometer generator 4 and an A.C. tachometer generator 7. The voltage of the generator 4 is compared with that of a reference source 5 and an error signal voltage is supplied through a servo-amplifier 3 to the field windings of the motor whereby the motor operates at a substantially constant speed. The generator 7 provides a square-wave voltage whose frequency depends on the motor speed and is compared with the frequency of a stabilized oscillator 10 in a phase-sensitive device 9. The latter produces a rectangular wave voltage, the wave shape of which varies with the phase difference between the two frequencies, which is supplied to the amplifier 3 so that the motor is controlled partly by the output voltage of the generator 4 and partly by that of the phase-sensitive device 9. The generator 7 comprises a slotted disc driven by the motor and co-operating with a lamp and a photo-transistor which provides the square-wave voltage varying with the motor speed, Fig. 4 (not shown). The amplifier 3 comprises a double-triode valve V1 having its grids connected to terminals I, II, which receive the voltages derived from the generator 4 and the device 9, respectively. The outputs of the valve V1 are supplied to the respective grids of twin-triode differential amplifier valve V2 which, in turn, controls the push-pull power valves V3, V4, in series with the field windings E1, E2 of the motor. The phase-sensitive device 9 comprises a triode valve with an input from the generator 7 and the primary winding of a transformer in its cathode circuit, the secondary winding being split to feed the cathodes of two double-diode valves. A further triode has its grid supplied from the reference oscillator and the primary winding of a second transformer in its cathode circuit. The split secondary windings of this transformer are connected between the respective opposite anodes of the doublediode valves. The output of the device is taken from the centre taps in the secondary windings of the second transformer, Fig. 3 (not shown).
Patent GB-731436-A (GB)
Title: Improvements in or relating to electron discharge devices employing hollow resonators
Inventor: PEARCE ALBERT FREDERICK
IPC: H01J25/30
Filed: 1952-06-05
Abstract: 731,436. Velocitymodulated tubes. ELECTRIC & MUSICAL INDUSTRIES, Ltd. June 5, 1953 [June 5, 1952], No. 14173/52. Class 39 (1). A klystron has a hollow resonator comprising two annular portions mounted about a common central axis and separated from each other by an annular gap lying in a plane transverse that axis and through which electrons flow in a radial direction, the resonator portions being arranged to be relatively axially movable so as to vary the gap capacity and so tune the resonator. In one embodiment annular concave cathode 1, Fig. 3, reflector 2 with focusing flanges 3, and resonator portion 4a are mounted rigidly on an insulating wafer 6 which is attached to the glass base via rods 8. Complementary resonator portion 4 is rigidly attached by means of rods 14 to plate 15 which is connected via corrugated disc 17 to flange 16. Axial motion of 4 is obtained by turning screw 18. Diaphragms 10 ensure parallel movement. The cathode and reflector may be interchanged, the cathode taking the form of a concave cylinder, Fig. 2 (not shown), and the reflector having flanges projecting radially inward toward the cathode. The wafer 6 may alternatively be supported by low temperature-expansion rods from the periphery of 15, thus compensating the effect of expansion of the glass envelope 20. In another modification both halves of the resonator may be mounted on flexible diaphragms. More than one resonator may be so tuned. Specification 577,037 is referred to.
Patent GB-118911-A (GB)
Title: Improvements relating to the Drying of Food and other Products.
Inventor: BOWLER LOUIS PATRICK
IPC: F26B21/00
Filed: 1917-10-02
Abstract: 118,911. Bowler, L. P., Paterson, A., and Levy, L. S. Oct. 2, 1917. Chambers; rotary containers.-Relates to apparatus for drying meat, fish, vegetables, copra, &c., by means of dehydrated air or gases. In the arrangement shown, air is drawn by a fan D in succession through a heating-chamber A, an air-filtering chamber B provided with screens b<2> charged or coated with dehydrating-material such as calcium chloride, and a drying-chamber C fitted with trays c<2> to contain the material to be dried. The trays may be mounted on a trolly c<4> to facilitate charging and discharging. Trays c<9> in the upper part of the chamber contain dehydrating-substances. The apparatus may be stationary or portable, and the drying-chamber may rotate.
Patent GB-958916-A (GB)
Title: Liquid sampling apparatus
IPC: G01N1/12
Filed: 1962-04-12
Abstract: 958,916. Sampling liquids. D. T. HEMSLEY. April 8, 1963 [April 12, 1962]. No. 14274/62. Heading B8N. Apparatus for sampling water from depths of down to thirty feet or more in river estuaries comprises a container 12 having one or more liquid inlet conduits 32 and one or more air outlet conduits 25, the outer end of the latter extending outwardly beyond the outer end of the liquid inlet conduits so that, when the apparatus is immersed, the difference in pressures at the ends of the conduits will cause the liquid to flow into the container, and a closure device 36 which is movable relatively to the conduits to effect opening and closing of the outer ends of the conduits. As shown the liquid inlet conduit extends through a block 23 down into a second container 29 which, if sterilized, can be used for collecting a sample for bacteriological examination; the liquid which flows  from the container 29 into the container 12 can be used for chemical analysis. The closure member, which is in the form of a cap 36 and slidably mounted on posts 35, is connected to toggle links 43, 45, the centre-pin 44 of each pair being urged towards the opposite pin 44 by tension springs. The apparatus, with the cap in its closed position over a rubber sealing block 26, is immersed by lowering a line connected to a handle 41 and, when at the required depth, the line is given a jerk to overcome the spring pressure and thereby cause the toggle mechanism to pivot and lift the cap and allow the water to fill the containers; when full, the apparatus is drawn up to the surface and an end cap 14 unscrewed to remove the inner container.
Patent GB-1367258-A (GB)
Title: Fluid flow metering method and system
IPC: G01F15/02
Filed: 1972-03-28
Abstract: 1367258 Fluid-flow metering HALLIBURTON CO 28 March 1972 14534/72 Addition to 1272049 Headings G4D D7X D6Y D6C1 and D6C2  The measurement of fluid-flow in a pipe-line 12, Fig. 3, by counting pulses in a counter 54 is corrected for temperature and pressure variations. As described each pulse from a gas flowmeter 16 sets a bi-stable 20 to enable gates 14, 28, 50, the bi-stable being reset by the output of a scaler 22, receiving pulses, at a frequency directly proportional to the temperature of the fluid, from a transducer 10 via enabled gate 14. The gates 28, 50 which are consequently enabled by each flowmeter pulse for a duration inversely proportional to temperature, pass pulses from an oscillator 30 in a pressure transducer and a fixed frequency oscillator 41 respectively via scalers 40, 52 to a subtractor 42 where the output from scaler 40 is subtracted from the output of scaler 52, the resulting pulse train being fed to counter 54. The scalers 22, 40, 52 are chosen so that the count corresponds to volume, corrected to standard temperature and pressure values. Bearing friction compensation may also be included as in Specification 1267441. The output pulses from the flowmeter 16 may be scaled in counters in a counter 26 to give an indication of gross flow.
Patent GB-593615-A (GB)
Title: Improvements in and relating to electrical switches and contacts therefor
IPC: H01H9/00
Filed: 1945-06-11
Abstract: 593,615. Switch contacts. BRITISH THOMSON-HOUSTON CO., Ltd. June 11, 1945, No. 14706. Convention date, June 12, 1944. [Class 38(v)] One of a pair of dissimilar co-operating contacts has a surface of an indium - copper alloy. An off-load tap-changing switch as described in Specification 502,393 has a wedge-shaped silver contact 10 bridging fixed cylindrical copper contact posts 2-7. Each post has a .00025" nickel coating, then a .0005" copper coating and finally a .000075" indium coating which diffuses into the copper coating when the posts are heat-treated.
Patent GB-737568-A (GB)
Title: Improvements in or relating to cyclic nitrogen compounds
Inventor: FRY DOUGLAS JAMES
IPC: C07D249/14
Filed: 1952-06-11
Abstract: 3 - Amino - 5 - mercapto - 1 : 2 : 4 - triazole, 2 - mercapto - 5 - amino - 1 : 3 : 4 - thiadiazole or mixtures thereof are prepared by subjecting guanidino dithiocarbamic acid to heat treatment in neutral or alkaline condition, preferably in aqueous medium.  At temperatures below 100 DEG  C. and under neutral or slightly alkaline conditions the product is chiefly the thiadiazole, whilst high temperatures and pH values favour the triazole formation.  A high-melting contaminant of formula C3H6N6S2 is often obtained and the mixture is resolved by extraction of the thiadiazole with ethanol, followed by crystallization of residue from water and then dilute hydrochloric acid to yield the pure triazole.  A modification of the invention consists of preparing the required guanidino dithiocarbamic acid in situ from aminoguanidine and carbon disulphide thereafter cyclizing by addition of a strong base preferably in water; or alternatively preparing the triazole directly from aminoguanidine and carbon disulphide by heating with a strong base under substantially anhydrous conditions.  Specified bases are alkali metal hydroxides, carbonates and alkoxides and triethylamine (preferably used in alcohol).  In examples (1) guanidino dithiocarbamic acid inner salt is treated with either water or caustic soda solution, using varying reaction periods and temperatures, thereby obtaining on acidification either mercapto amino thiadiazole, mercaptoaminotriazole or mixtures of these together with a high melting residue; (2) guanidino dithiocarbamic acid inner salt is heated alone to produce mercapto aminotriazole; (3) aminoguanidine hydrochloride (or bicarbonate) and carbon disulphide in the presence of sodium methoxide, triethylamine or sodium hydroxide yields mercaptoaminotriazole.  Specifications 583,648, [Group XX], 648,185 and 737,567 are referred to.
Patent GB-119116-A (GB)
Title: Improvements in the Securing of Guy Ropes, and the like Tension Ropes or Cables.
Inventor: WHITE JOSEPH WALWYN
IPC: E02D5/80
Filed: 1917-10-12
Abstract: 119,116. White, J. W. Oct. 12, 1917. Ground anchors.-Relates to anchoring-devices for guy ropes and similar stays, and comprises plates 1 pierced with holes to receive headed flukes 3 or screwed pins, the heads of the screwed pins being placed at right-angles to the holes when in position. Lugs 9 secured to the plates may be provided for the stays, or these may be secured to eyes forming the heads of the screwed pins. Where a number of plates is employed these may be arranged to overlap as shown in Figs. 1 and 2 or arranged in parallel as shown in Fig. 7. In a modification, the ground plates may be formed of channel section, the base being pierced with triangular holes to receive similar section flukes and the flanges with holes to carry the bolts to which the stay wires are attached. In a second modification, the flukes may be slotted at 22, Fig. 9, to act as ground plates. Specifications 16428/97 and 24367/05, [both in Class 104, Railways &c.], are referred to.
Patent GB-239937-A (GB)
Title: Improved variable-speed gear
IPC: F16H61/02
Filed: 1924-06-19
Abstract: 239,937. Worthington, R. C., and Milner, H. June 19, 1924. Variable-speed and reversing gearing comprises a three-speed epicyclic arrangement operated automatically by a sliding face cam 5, Fig. 1. The cam 5, which slides on a driving- shaft 2 against a control spring 36, coacts with a like member 18 secured to an aligned middle shaft 17. The shaft 17 is integral with a sun gear 17<a> which meshes with stepped planet gears 23 carried by a driven plate 21. The gears 23 mesh with a one-way revoluble internally-toothed gear 24 and with idlers 23b, Fig. 2, which mesh with a loose sun gear 15<b> integral with a clutch disc 15. The cam 5 is integral with a face clutch 19 which is normally held by the spring 36 in engagement with the disc 15, whereby the parts are locked for solid driving. Increase of load causes the cam 5 to move to the left of Fig. 1, disengaging the clutch 19, and applying a brake 14 to the disc 15. Epicyclic action causes the disc 21 to be driven at middle speed. Further increase of load releases the brake 14, upon which the ring 24 tends to run backwards, but is prevented by a detent such as a wedging ball 25, Fig. 2. This brings the lowest speed into action. A spring catch 37 helps to make the stepped changes definite. Reversed driving may be effected by a train 21<b>, 34, 35, 35<a>, 29. The toothed wheel 29 slides on an ultimatelydriven shaft 30 and carries clutch dogs 29b adapted to engage for forward driving with holes in the gear 21<b>, which is fast with the disc 21. Movement of the wheel 29 to the right brings to neutral. The meshing set 34, 35, 35<a >is carried on a pivoted arm 32 which is depressed to connect the reversed drive.
Patent GB-713847-A (GB)
Title: Improvements relating to toothed gearing
IPC: F16H57/02
Filed: 1951-06-22
Abstract: 713,847. Toothed gearing. GLENNY, A. P., and SPERRY GYROSCOPE CO., Ltd. June 23. 1952 [June 22, 1951], No. 14852/51. Class 80 (1) To ensure correct depth of mesh when a gear 1 is brought into engagement with a gear 2 by swinging of the shaft 3, each gear has secured thereto a ring 7, 8 of pitch circle diameter and the rings are held in rolling contact by a spring 11 bearing against the end of the shaft. The shaft 3 is supported at one end by a pivotal bearing and at the other end by a slot in. a fixed plate carrying the spring 11. According to the Provisional Specification two bevel gears are brought into mesh by axial movement of one of the shafts. each gear having attached thereto a single, or a pair of frustro-conical rings corresponding to the respective pitch surfaces, and the movable shaft is spring-loaded to hold the rings in rolling contact.
Patent GB-111314-A (GB)
Title: Manufacture of Sodium Sulphite.
IPC: C01D5/14
Filed: 1917-04-19
Abstract: 111,314. Crump, G. L., and Ekacertin, Ltd. April 19, 1917. Sodium sulphite is produced by heating a mixture of sodium sulphate and iron, with or without carbon, in an atmosphere of sulphurous acid. Specification 6790/99 is referred to.
Patent GB-222912-A (GB)
Title: Improvements in automatically variable gears
IPC: F16H3/44
Filed: 1923-06-08
Abstract: 222,912. Johnston, J. June 8, 1923. Variable-speed gearing is rendered automatic by a planetary mass or masses h which are positively connected by elliptic or like gearing io both driving and driven shafts a, b. In the arrangement shown, there are two flywheels h, h<1> connected by planet wheels e, e<1> and subjected to changes of momentum while turning in one direction by elliptic gear pairs g, f and f<1>, g<1>, the gears g, g<1> being secured to the shafts a, b respectively. Several such gear sets may be arranged in series.
Patent GB-114115-A (GB)
Title: Improvements in Horse Shoes.
Inventor: HIGGINS JOHN WHARTON
IPC: A01L1/02
Filed: 1917-10-17
Abstract: 114,115. Higgins, J. W. Oct. 17, 1917. Integral treads. - The shoe is provided integrally with a non- slipping wearing surface consisting of a curved rib 2 the centre line of which is nearer to the inner curve of the shoe than it is to the outer curve, and transverse ribs 5 of the same height as the curved rib. The shoe is thus provided with a number of edges one or more of which are at right-angles to any direction in which there is a tendency to slide. The nail holes 6 are outside the curved rib and preferably in the angles formed by the curved and cross ribs.
Patent GB-567355-A (GB)
Title: Improvements in or relating to tube swaging machines
IPC: B21D15/02
Filed: 1943-09-14
Abstract: 567,355. Stamping tubes to form tag ends. WELLMAN SEAVER ROLLING MILL CO., Ltd., and SMITH, S. Sept. 14, 1943, No. 15079. [Class 83 (iv)] The ends of tubes are collapsed to form tags for threading through drawing dies by a fluidoperated press of the contracting-die type. Dies 12, Fig. 1, carried by three or more hydraulic rams 5 equi-spaced circumferentially, have projections 17 to cause initial collapse of the tube and have interengaging surfaces 15, Fig. 6, to ensure that all the rams move at the same rate. The stroke is determined by the ends 8 of cup-shaped members, carried by tail rods 6 of the rams, contacting the ends of the cylinders. The cups also house retracting springs 9. The bracket supporting the cylinder frame has a central work-supporting bush. Fig. 7 shows a modified form of die engaging at 19 for contraction control.
Patent GB-889984-A (GB)
Title: Improvements in and relating to electric push button switch assemblies
IPC: H01H13/58
Filed: 1959-05-04
Abstract: 889,984. Keyboard switches; switches held set and freed mechanically. SCHWEITZER, H. E. May 4, 1959 [March 24, 1959]. No. 15158/59. Class 38 (5). A push-button switch comprises a movable contact carrier 6 loosely mounted on a pin 5 and biased to the position shown by a spring 8. The pin 5 has a portion 5c rotatably carrying a sleeve 5d, and the latter has an axial slot engaged by a fixed pin 54 which can also enter axial grooves 53 in the portion 5c. The grooves open into a circumferential groove 50 bounded on one side by teeth 51 and on the other by teeth 52 offset from teeth 51 by half a tooth pitch. Thus successive actuations of the button 5a cause the pin 54 to act on the sloping faces of the teeth 51, 52 to rotate the portion 5c, so that the pin 54 alternately comes opposite grooves 53 which permit retraction of the button, and teeth 52 which do not permit such retraction. Specifications 677,376 and 813,965 are referred to.
Patent GB-986381-A (GB)
Title: Improvements in or relating to rotary hectographic duplicating machines
Inventor: MATTHEWS STEPHEN
IPC: B41L11/00
Filed: 1960-04-29
Abstract: 986,381. Copying documents. BLOCK & ANDERSON Ltd. April 25, 1961 [April 29, 1960], No. 15176/60. Headings B6B and B6C. A rotary hectographic duplicating machine comprises a printing drum 10 and a counterpressure member 14 arranged for selective line printing from a mirror-script master image 12 carried by the drum 10 and includes means 29 (for gripping the copy sheet 16) located immediately prior to the printing zone 15 and which are movable between an operative and an inoperative position under the control of a sensing device 33 which determines the presence or absence of a sheet 16 under the control of restraining means such as a dampening pad 24, said gripping means 29 being moved into an operative position as the trailing edge of the sheet 16 is about to pass from under the control of the pad 24. Parts of the drum surface 11 are radially movable between an inner inoperative position b and an outer printing position a. Feeding sheets.-A sheet 16 is placed on a table 17 against a stop 18 with its leading edge at a position 19 at the bight of two feed rollers 20, 21 and depresses a feeler arm 33. The pad 24 is then lowered on to the sheet and roller 21 raised, rotated to bring the leading edge of the sheet 16 to position 15, and then lowered under the control of a cam arrangement. The copy sheet is held stationary between periods of movement and printing by the pad 24, but as the trailing edge of the sheet 16 passes from over the feeler arm 33 and just before the sheet passes from beneath the pad, switch contacts 34 close and energize a solenoid 31. The gripper member 29 is then raised and holds the sheet against a guide plate 32 and provides a frictional drag equivalent to that exerted by the pad 24 so that movement of the sheet is only allowed when a member 11 in position a opposes the roller 14 in the nip 15. A further set of feed rollers 22, 23 are also provided, the roller 23 being raised, under the control of a cam, to grip the sheet and rotated to cause movement thereof equal to a unit text line of the master sheet 12. Specifications 882,924, 900,117 and 907,212 are referred to.
Patent GB-517215-A (GB)
Title: Improvements in plate heat exchange apparatus for fluids
IPC: F28D9/00
Filed: 1938-05-21
Abstract: 517,215. Plate heat-exchangers. PERSSON, R. A., and NAUCLER, J. O. May 21, 1938. No. 15221. Convention date, May 22, 1937. [Class 64 (iii)]. A heat-exchanger comprises superposed spirally-corrugated plates, separated if desired by plane plates, forming adjacent passages for the fluids between which heat is to be exchanged, and inlets and outlets for the fluids disposed so that each fluid flows only from the centre to the periphery or vice versa. The plates 10, Fig. 7, may be spaced by inner and outer rings 22, 23 of hard rubbber &c. and clamped between covers having inlets and outlets 41, 43 and 42, 44 respectively communicating with ducts 30 ... 33 formed by aligned ports in the plates and the rings. The fluid admitted to the duct 30 passses through the openings 26 in the alternate rings 22 into the corresponding spiral passages, and then through openings 29 in the inner rings and the duct 33 to the outlet 44, the other fluid passing from the duct 32 through the alternate spiral passages to the outlet 42. Both fluids may, however, pass through the passages in the same direction. The exchanger may be formed of alternate flat and corrugated plates 10, 11, Fig. 2. Further, the corrugations may be of the form shown in Fig. 5. Fig. 6 shows a modification in which the section of the corrugation on one side of each plate decreases progressively from the periphery to the centre, this arrangement being particularly suitable for apparatus used in the generation or the condensation of steam. Two or more corrugations in parallel may be formed on opposite sides of the plates.
Patent GB-152765-A (GB)
Abstract: 152,765. Easting, C. A. July 21, 1919. Wind - screens for motor - cycle side-cars and other motor-vehicles are in three parts, a central flexible or main portion 1 and two side wings 3, 4 each forming a continuation of the middle portion. The central member of the screen is rigid in the vertical direction but horizontally flexible, as described in Specification 109,601. The side wings are detachably connected or pivoted to the central portion so that they can be folded flat. The lower edges 5 are adapted to be secured to the bodv of the car. The screen may be supported by the arrangement described in Specification 152,764. Specification 108,334 is also referred to.