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    • 64. 发明专利
    • Improvements in electric switches more particularly for radio receivers
    • GB417437A
    • 1934-10-04
    • GB1390134
    • 1934-05-08
    • LISSEN LTDJOHN WILLIAM CLARK
    • H01H1/26
    • 417,437. Switch contacts. LISSEN, Ltd., Worple Road, and CLARK, J. W., 623, London Road, both in Isleworth, Middlesex. May 8, 1934, No. 13901. [Class 38 (v).] A switch suitable for use in a wireless receiver comprises a pair of contact springs 5, 6 mounted on insulating plates on a base 1. A square or like section spindle 9 is mounted to rotate in depending brackets 3 and is provided with an operating knob (not shown). An insulating cam 10 is mounted on the spindle 9 for forcing the spring 6 into contact with spring 5, the movement being limited by a pin 14 on the spindle 9 and stop pins 15. The cam 10 is provided midway between its ends with a circular flange 12 which passes through a slot (not shown) in the spring 6 and engages the spring 5, which is biassed strongly towards the spring 6. In this way the contact pressure is greatly increased. The engagement of the flange 12 in the slot in spring 6 prevents axial movement of the cam. A number of cams on the spindle 9 may operate a number of sets of springs and a spring detent engaging a notched wheel may assist in locating the operative positions.
    • 66. 发明专利
    • Improvements in or relating to apparatus for use in drilling wells, particularly oil wells
    • GB186385A
    • 1922-09-27
    • GB1470121
    • 1921-05-26
    • VICKERS LTDWILLIAM CLARKSAMUEL ROBINSON
    • E21B10/34
    • 186,385. Vickers, Ltd., Clark, W., and Robinson, S. May 26, 1921. Bore-hole apparatus.- In a well-drilling too], the drill stem 1 pivotally supports cutters 9 and slidably contains a spindle. 3 pivoted at 6 to togglelevers 6 carrying rollers 8. When the tool is lowered through a casing 2, engagement of the rollers 8 with the casing causes the toggle-bars to hold the spindle 3 in its upper position, the cutters then occupying the position shown in dotted lines; when the rollers pass the casing, gravity, assisted if desired by a spring 4, causes the spindle to move downwards, rocking the cutters into operative position and locking them by engagement with surfaces 9 . 9 . On raising the tool, the toggle mechanism causes the cutters to assume their inoperative position before they reach the casing. The cutter pivots 10 are readily removable, whereby the percussive cutters shown in Fig. 1 may be replaced by holders 9a, Fig. 6, each with a grooved spigot 16 on which a divided bush 17 is rotatably mounted, a toothed rotary cutter 18 being threaded to the bush. Lubricant ports 20 and packings 21, 22 are provided. Contact surfaces of the tool may be locally hardened by the process described in Specification 5588/10, [Class 72, Iron &c.].
    • 68. 发明专利
    • Improvements in Dynamos for the Production of Uniform Continuous Current.
    • GB128787A
    • 1919-07-03
    • GB1276518
    • 1918-08-06
    • EVERSHED VIGNOLES LTDWILLIAM CLARK
    • H02K23/62
    • 128,787. Evershed & Vignoles, and Clark, W. Aug. 6, 1918. Rotary machines; pole-pieces and cores; commutators; commutation, improving by means of condensers.-Continuous-current dynamos for use in connexion with the telephones or other current indicators employed for receiving messages by wireless telegraphy and for other purposes are constructed so that the current is not only uniform, but is free from any irregularities or ripples. The armature core consists of a laminated ring of uniform cross-section devoid of slots, keyways, driving-tongues, &c., with the windings uniformly and continuously distributed round said ring ; the commutator comprises a large number of segments connected to equidistant points of the armature winding; the pole-pieces of the field magnet are formed with slanting edges to prevent disturbances in the total electro-motive force of the machine owing to the short-circuiting action of the brushes in commutation; and a condenser is connected across the main terminals. The armature may be situated within or outside the field magnet, and either the armature or the field magnet may be the rotatable element. Fig. 1 shows one construction in which the field magnet h with its coils h rotates within the stationary armature a. and is supplied with current through slip-rings and brushes m, m . The poles n, n of the field magnet are separated by a wide neutral space, and the length n , Fig. 3, of the slanting tips is equal to, or greater than, the arc length of each section or coil of the ring armature winding c. The field magnet may be a permanent magnet. The ring armature a, with its winding c, is encased in a metal housing d in thermal contact with the outer casing e; the coils of the winding are joined to commutator segments i' upon which bear rotating brushes k, k connected to the main terminals through slip-rings and brushes p, p ; a condenser o is joined across these terminals, as shown. In a modification, the external armature is rotated around a stationary field magnet, the shaft of which is hollow and contains the leads passing to the outside of the machine.
    • 69. 发明专利
    • Improvements in or relating to Firebrick Chequer Work used in Regenerative Chambers and the like.
    • GB191511911A
    • 1916-08-18
    • GB191511911D
    • 1915-08-18
    • GIBBONS BROTHERS LTDFRANK WILLIAM CLARK
    • F23M3/00
    • 11,911. Gibbons Bros., and Clark, F. W. Aug. 18. Bricks, special shapes of.-Refractory bricks for forming chequer-work of furnace regenerators and carburetting and superheating chambers of carburetted water-gas plant are formed with double inclined or rounded upper portions 1, Fig. 4, separated by bearing-surfaces 2, and with double inclined or rounded lower portions 3 separated by recesses. The bricks are built up in the form of cross rows, as shown in Fig. 2, so that they interlock and the rows of bricks in any layer are staggered in relation to the next parallel rows of bricks above or below. The inclined portions of the bricks are practically in the same plane as the inclined portions of the bricks in the rows above and below, so that the speed of the gases in passing through the chequer-work is practically constant. Fig. 10 shows a modified form of brick in which the inclined or rounded parts 1 project above the bearing-surfaces 2 and act as distance-pieces. The angles made by the projecting parts 3, Fig. 5, with the under surface of the brick may be rounded; also the angles between the parts 1 and the parts 2, Fig. 10, may be rounded and made to engage with the corresponding rounded surfaces of adjacent bricks.