The Independent . reesFahrenheit. This is 7000 degrees high-er than the melting point of the metalholders of the carbons, and as the hold-ers are only an inch away from thisintense heat it is necessary to protectthem by a current of cool air. So amotor driven centrifugal blower is em-ployed which forces a current of airthru the electrode or carbon supportsand discharges it thru heat-radiatingdiscs that surround the holders. Oth-erwise such a light could not be oper-ated, as the metal parts would be meltedin short order. Several points of difference accountfor the extreme brilliance of this typ
The Independent . reesFahrenheit. This is 7000 degrees high-er than the melting point of the metalholders of the carbons, and as the hold-ers are only an inch away from thisintense heat it is necessary to protectthem by a current of cool air. So amotor driven centrifugal blower is em-ployed which forces a current of airthru the electrode or carbon supportsand discharges it thru heat-radiatingdiscs that surround the holders. Oth-erwise such a light could not be oper-ated, as the metal parts would be meltedin short order. Several points of difference accountfor the extreme brilliance of this typeof lamp with its high intensity electricarc. Its effectiveness is due to smallelectrodes, the special or impregnatedcarbons used, the manner in which theyburn and the large parabolic mirrorreflecting the light. The voltage acrossthe arc is about 75. The lamp is oper-ated at such a high temperature thatthe carbons give off a superheated va-por which burns in a crater of smalldiameter that is maintained in the pos-.
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Keywords: ., bookcentury1800, bookdecade1840, bookpublishernewyorkswbenedict
