overall: 5 1/4 in x 5 3/4 in x 4 1/4 in; 13.335 cm x 14.605 cm x 10.795 cm
Object Name:
relay
polar relay
telegraph relay
Description:
Telegraph relays amplify an electrical signal in a telegraph line. Telegraph messages travel as a series of electrical pulses through a wire from a transmitter to a receiver. The pulses fade in strength as they travel through the wire, limiting the distance a message can be sent. Relays remedy that problem by detecting a weak signal and automatically re-transmitting that signal down the line using a local power source.
