Teletype 28 - Page 134

SECTION 573-118-700TC
3. 55 Timing Contact Mechanism (Operated by Selector)
Note 1: Parts should be well aligned and free
(See Notes 2 and 3 below)
(A) "M" CONTACT SPRINGS
of sharp bends. Contact points misalignment
should not exceed 1/4 the diameter of points.
(B) "B" CONTACT SPRINGS
Requirement
Min 4 oz ------------""""'
to move contact spring away from its
stiffener.
To Adjust
Bend contact spring.
CONTACT
1
-q
1
ASSEMBLY .. ,, '· :I ,I
Requirement
,.-----------Min 4 oz
to move contact spring
away from its stiffener.
To Adjust
Bend contact spring.
(C) "S" - "B" CONTACT SPRINGS
Requirement
.----Min 3-1/2 oz
Max 4-1/4 oz
q ! ii :: :: ::: ' I ~E;E
to move swinger contact
away from normally break
contact.
To Adjust
Bend swinger contact
spring.
(D) TWIN "B" CONTACT SPRINGS
(1)
Requirement
Both contacts should open at the
SWINGER CONTACT
W /INSULA
TOR
(E) "S" - "M" CONTACT GAP
same time.------------,.
(2) Requirement
The insertion of 0. 008 inch gauge
between one pair of points should
not cause the other pair to separate.
To Adjust
Bend springs or slightly twist stiffener.
Recheck contact pressure.
CONTACT
MOUNTING
BRACKET
,-_-:
(F) TWIN "M" CONTACT SPRINGS
Requirement
Both break and swinger contacts should
make approximately the same time.----~
To Adjust
Bend break contact springs or slightly
twist stiffener.
Page 134
Requirement
'------Min 0. 012 inch
Max 0. 020 inch
To Adjust
SWINGER CONTACT
W/INSULATOR
Bend stiffener.
Note 2: In this text, the
letters s, B, and M are used
to denote respectively the
''swinger", ''break" (normally
closed with lever riding cam
depression), and "make"
(normally open; closed only
with lever riding cam peak)
contact springs.
Note 3: When making adjust-
ments (F) through (H) make
certain the S spring insulator
is clear of the operating lever.