Flashlight Used as Field Phone (May, 1934)
What, no camera?
Flashlight Used as Field Phone
A COMBINATION flashlight, telephone and telegraph device may be hooked in on telephone or fence wires to provide field communication.
Operating on a two-cell flashlight battery, the device has receiver and transmitter in one. It has a folding telegraph key for code signals and a flashlight lamp for copying messages at night.
Feature creep- it’s not just for new stuff anymore!