. Operation and adjustments of the automatic three wire telephone . pring has too much tension,difficulty will be had in the initial rotation of dial andreturning speed will be too great. The dial spring should always be kept free from dust andrust, as either if present in sufficient (quantities will causethe spring to bind with the result of uneven impulses in calling. B. Normal Stop The next component of the main shaft assembly to be takenup is the normal stop. It is attached to the inner end of mainshaft by collar clamp and set screw. { See Figure 2 part 8. )It has two arras about 40 degree
. Operation and adjustments of the automatic three wire telephone . pring has too much tension,difficulty will be had in the initial rotation of dial andreturning speed will be too great. The dial spring should always be kept free from dust andrust, as either if present in sufficient (quantities will causethe spring to bind with the result of uneven impulses in calling. B. Normal Stop The next component of the main shaft assembly to be takenup is the normal stop. It is attached to the inner end of mainshaft by collar clamp and set screw. { See Figure 2 part 8. )It has two arras about 40 degrees apart that operate in a planeat right angles to shaft. Its function is to engage the leverlock and release talking springs. In normal position the lowerarm holds the talking springs in contact. 7/hen a call is to bemade it is very necessar:/ that these springs be parted, foras explained in introduction the talking circuit is metallic,while the calling circuit is from one side of line to ground, andif springs are not parted line will be shorted and calling short. Fig. E- Sin^l^Party, Line Telephone Kay bocurd. G roo/ic/ Post. f^ac<j V« k Hook, II- lk!»j Springs. ^y X^^, Spnti^. ^-mfl/ Stofi, IS- (governor.^. - L a\^e r Lock, 3,-Lever Lock Sfrr/n^. »i€ler /frnt^rccktt^ Gear Wheel. Ftrptn ffuto, £teet. Go. T^rint. \
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelephone, bookyear19
