Teletype 28 - Page 159

ISS 8, SECTION 573-118-700TC
4.04 Signal Bell Contact Mechanism (For Later Design see 3.02}
1 ~ -SIGNAL BELL CONTACTS
BELL FUNCTION BLADE
\-ol CONTACT MOUNTING
BRACKET
(B) FUNCTION BLADE SPRING
BRACKET MOUNTING
Requirement--- Refer to 2. 49.
SCREWS
--, (Front View)
FUNCTION BOX
FRONT
PLATE
A) CONTACT MOUNTING BRACKET
(1} To Check
Disconnect contact. Select LETTERS
code combination (12345). Rotate
main shaft until bell function blade is
in lowest position (resting on bell-
cranks).
Requirement
....----- Normally open contact open.
(2) To Check
Select BELL code combination and
rotate main shaft until bell function
blade is in lowest position.
Requirement
Bell function blade in slots of bell-
cranks and normally open contact
closed.--------------------------~
To Adjust
With mounting screws loosened, posi-
tion contact mounting bracket.
Tighten screws.
BELL FUNCTION
BLADE SENSING
FINGERS
BELL FUNCTION BLADE
(Right Side View)
-----
""'
t;;;;,. ..... -..-.
BELLCRANKS
(Right Side View)
CAUTION: THERE SHOULD BE SOME CLEARANCE BETWEEN RIBBON FEED DRIVE ROLLER
AND CONTACT MOUNTING BRACKET WHEN UNIT IS IN STOP POSITION. IF NECESSARY,
REFINE ABOVE ADJUSTMENT.
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