File:Operation and adjustments of the automatic three wire telephone (1915) (14753722054).jpg

Identifier: operationadjustm00deck (find matches)
Title: Operation and adjustments of the automatic three wire telephone
Year: 1915 (1910s)
Authors: Decker, Benjamin Harrison
Subjects: Telephone Theses
Publisher:
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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Text Appearing Before Image:
Fig. E- Sin^l^Party, Line Telephone Kay bocurd. G roo/ic/ Post. 6.- f^ac<j V« k Hook, II- lk!»j Springs. S.-Rotai^y X^^, Spnti^. 5.-Wo^-mfl/ Stofi, IS- (governor.^. - L a\^e r Lock, 3,-Lever Lock Sfrr/n^. S.-5f»i€ler /frnt^rccktt^o.- Gear Wheel. Ftrptn ffuto, £teet. Go. T^rint. \
Text Appearing After Image:
-11- will bo the result. Wow as inain shaft turns at the beginning ofa call the lower arm rises and due to the tension in talkingsprings they part of their own accord. The next function of the normal stop is to connect groundspring to ground post. See Figure 2 parts 1, 2^ In normalcondition the ground spring should not be in contact with groundpost, as ground post is connected directly to release springsand line connections would be released if receiver hook was pulleddown when line was in use. In normal position the ground springis held away from ground post by lever lock. See Figure 2 part 4.The function of the upper arm of normal stop is to lift lever lockaway and allow ground spring to engage ground post. To do thisa small pin in end of upper arm of normal stop pushes lever armup, and then ground spring due to its own tension presses onground post. At this point the adjustment of lever lock and groundspring will be taken up. The lever lock swings loosely on asmall screw that is at

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