Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 71
arts should be carefully insulated from the coils and otherparts having electrical functions. The question of receiver cords is one of a good deal of importance,as a faulty cord is one of the most prolific sources of trouble in anypart of a telephone instrument. If the conductors in a cord are… … FIG. -\\.\TCH-C.\SE RECEIXER WITH HEADBAND. conductors in the best receiver cords are usually composed of tinsel,laid up in the manner of ordinary twisted rope; a few strands offine copper wire are frequently added to give greater strength. Thesetinsel conductors are then tightly wrapped with silk…
Telephone
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