. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. alk cylinder when necessary. The action of this apparatus is as follows ;—Between the metallic strip resting on the chalkcylinder and the chalk, there is a certain amount of friction, and if the cylinder be caused to rotateaway from the diaphragm, this friction tends to draw the diaphragm towards the cylinder. Theamount of movement given to the mica plate, depends upon the friction between the cylinder andmetal, and the friction rises and falls with the quantity of current passing, the greater the current
. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. alk cylinder when necessary. The action of this apparatus is as follows ;—Between the metallic strip resting on the chalkcylinder and the chalk, there is a certain amount of friction, and if the cylinder be caused to rotateaway from the diaphragm, this friction tends to draw the diaphragm towards the cylinder. Theamount of movement given to the mica plate, depends upon the friction between the cylinder andmetal, and the friction rises and falls with the quantity of current passing, the greater the current ELEOTEICAL ENGINEEEING. 585 the less the friction, and conversely. By this means the fluctuations of the current produced in thecarbon transmitter are faithfully reproduced as sound in the telephone. The crown telephone, devised by G. M. Phelps, has been used with excellent results in com-bination with the Edison carbon transmitter. It consists of an ordinary combination of diaphragm,bar magnet and coil, but, in addition, there is a group of six permanent magnets, bent into a
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectenginee, bookyear1879
