Operation and adjustments of the automatic three wire telephone (1915)
Decker, Benjamin Harrison · leaf 52
es on theupper talking spring ( part 8 ) and then on the vertical linebinding post, ( part ). Then the rotary spring is broughtinto contact with the ground post the circuit goes through therotary spring directly to the rotary line binding post. ( part16 ). The impulse springs receive their… … Fig. 5b- Xmt?yjls<z. Springs. 3. ^■f>rin^ -ShouJc{(z.r.
Telephone · Theses
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