. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. ents. The principles ofaction are in the change of a highelectro-motive force or voltage,to a low one, and 7ice versa. The secondary or low voltagewinding is of coarse wire woundnext to the soft iron core, withthe primary, high voltage, finewire wound on the outside;t
. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. ents. The principles ofaction are in the change of a highelectro-motive force or voltage,to a low one, and 7ice versa. The secondary or low voltagewinding is of coarse wire woundnext to the soft iron core, withthe primary, high voltage, finewire wound on the outside;thoroughly insulated and provided with means for cooling by air circu-lation or an oil bath. 410. Shows the form of the core and winding. 411. RECORDING AM-PERE METER. Bristols is a stationary coil or solenoidthrough which current passes. Bis a very thin disk armature of ironsecured to a non-magnetic shaftwhich extends through center ofthe solenoid A, and is supported atits opposite ends on steel knife-edgespring supports C and D. Therecording pen arm E is secured di-rectly to the steel spring support D,and partakes of its angular motionas the armature is attracted to thecoil or solenoid by a current passingthrough the solenoid. The face or re-cording dial is not shown as it coversthe clockwork that drives the ELECTRIC POWER AND DEVICES. 171 412. NOVEL ARC LAMP. Carbons are held in inclined troughs^^f 19, supported on springs 31, 16, by similar troughs 35, 21, which are carried by headed pins 37, and are at-tached by insulating sockets 57 to the endsof an expansible metal strip 53. The stripis surrounded by a coiled heating resistance51, connected in series with the carbons,and is thus heated and expanded so as topress the movable troughs 35, 21 againstthe carbons, and move the carbons apart,when sufficient current is supplied, but toallow the carbons to move together and slipdown when the current decreases. Eachcarbon may be pressed down by a spring 49placed betwe
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Keywords: ., bookauthorhiscoxga, bookcentury1900, bookdecade1910, bookyear1910
