Operation and adjustments of the automatic three wire telephone (1915)
Decker, Benjamin Harrison · leaf 53
-22- that the spring and ground posts be lined up so that the platinumpoints engage squarely and firmly. The spring must also l)elined up so that the cam teeth engage the shoulder of springbroadside. Therefore the shoulder of the spring should have thesame angle as the cam teeth. As described…
Telephone · Theses
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
