Teletype 28 - Nary) (Single Button Armature); Selector Armature Spring

ISS 8, SECTION 573-118-700TC
2. 05 Selector Mechanism (continued)
SELECTOR ARMATURE SPRING (Preliminary)
(For Units Employing Selector Armature With Two Antifreeze Buttons Only)
Requirement
With locking levers and start lever on high part of their cams, scale applied as nearly vertical
as possible under end of armature extension, it should require approximately the following
tensions to move the rear antifreeze button against the magnet core.
0. 020 Ampere- Approximately 14 grams
r-------~ 0. 030 Ampere - Approximately 18 grams
0. 060 Ampere - Approximately 21 grams
ro Adjust
Position armature spring adjusting nut.
//:.- ARMATURE SPIUNG
I
I.
(Front View)_
ARMATUREJ
EXTENSION
REAR BUTTON
Note:
See SELECTOR RECEIVING MARGIN (2. 12) adjustment
SELECTOR ARMATURE SPRING (Final)
(1)
Requirement
When a distortion test set is available, the selector armature spring tension should be
refined, if necessary, to obtain satisfactory receiving margins. The front antifreeze
button must contact the magnet core when the magnet coils are energized.
ARMATURE
EXTENSION
(2)
Requirement
FRONT BUTTON
See SELECTOR RECEIVING MARGIN (2. 12) adjustment.
~ATURE ·sPRING
(Front View)
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