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SECTION
57 3-115-700
3. 34
Universal Contact (Stunt Box) Mechanism
NOTE:
1.
THESE ADJUSTMENTS SHOULD BE MADE WITH THE CONTACT BRACKET ASSEMBLY REMOVED
2.
IF CONTACT SCREWS ARE DISTURBED TO OBTAIN A REQUIREMENT, THEY MUST BE RETIGHTENED
--
AND ALL PRECEDING REQUIREMENTS RECHECKED.
CAUTION: IF IT IS NECESSARY TO INCREASE THE CONTACT SPRING TENSIONS, IT IS ADVISABLE TO
REMOVE THE CONTACT SPRING TO INCREASE ITS CURVATURE. AVOID DAMAGE TO CONTACT
SPRINGS WHEN ADJUSTING THE STIFFENERS IN THE ASSEMBLY.
(A) CONTACT
1
•
REQUIREMENT
CONTACT SPRINGS AND STIFFENERS MOUNTED VERTICALLY AND CONTACT POINTS IN
ALIGNMENT (GAUGE BY EYE).
TO ADJUST
POSITION THE CONTACT SPRINGS AND STIFFENERS WITH ASSEMBLY SC�EWS LOOSENED.
2.
REQUIREMENT
STIFFENERS SHOULD BE PARALLEL WITH THE CONTACT BRACKETS.
TO ADJUST
FORM THE STIFFENER
3.
REQUIREMENT
CONTACT SPRINGS SHOULD REST AGAINST THEIR STIFFENERS THROUGHOUT THEIR WIDTH·.
TO ADJUST
BEND TOP FORMED SECTION OF STIFFENER. IF NECESSARY, BEND CONTACT SPRINGS.
(B) NORMALLY OPEN CONTACT
WITH THE NORMALLY CLOSED CONTACTS CLOSED,
THE NORMALLY OPEN CONTACT SHOULD BE OPEN
MIN
0.020
INCH
MAX
0.025
INCH
TO ADJUST
BEND STIFFENER
(C) CONTACT SPRING
(TWO
MIN 20Z
MAX
3
OZ
TO MOVE EACH CONTACT SPRING AWAY FROM
ITS STIFFENER, WITH THE SWINGER HELD AWAY
TO ADJUST
REMOVE AND FORM THE SPRING.
Page 110
0.075
TO
0.085
INCH
(100
WPM)
NORMALLY CLOSED
CONTACT
NORMALLY OPEN CONTACT
(D) SWINGER
REQUIREMENT
MIN 40Z
MAX 60Z
TO MOVE SWINGER FROM
NORMALLY CLOSED CONTACT.
TO ADJUST
BEND SWINGER
•
Summary of Contents for Plant Series
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