"Telephone circuit" Quotes from Famous Books
 ... and telephone wires below. The danger is so great and damage so serious that, at Philadelphia, Mr. Plush, the electrician to the Telephone Company, has devised this exceedingly pretty cut-out. It is a little electro-magnetic cut-out that breaks the telephone circuit whenever a current passes into the circuit equal to or more than an ampere. The arrangement works with great ease. It is applied to every telephone circuit simply, to protect the telephone system from electric light wires, that ought ...
— Scientific American Supplement, No. 481, March 21, 1885 • Various |
