Teletype 28 - 3.04 Code Reading Contact Mechanisms

SECTION 573-118-700TC
3. 04 Code Reading Contact Mechanisms (Make-Only and Transfer Types)
Note 1: Unless specifically stated otherwise, the following code reading contact adjustments
apply to both the transfer (break before make) type and make type contacts. When an
adjustment is applicable to both types, thE:: transfer type contacts are used in the illus-
trations. When testing these contacts on ASR sets the control knob should be in the K-T
position.
Note 2: It is recommended that
the following adjustments be
made with the code reading
contact assembly removed from
the unit.
Note 3: When using the contact
spring bender, start with the
contact pile-up farthest from
the handle of the tool and work
toward the handle so as not to
disturb adjustments already
made.
(A) MARKING CONTACT BACKSTOPS
Requirement
As gauged by eye, five marking contact
springs should align with each other and
be parallel with mounting plate.--------'
To Adjust
Bend marking contact backstops.
MARICNG CONTACT BAC
(B) MARKING CONTACT SPRINGS
(Pre lim inary)
Requirement
With swinger contact spring held away
(Left Side View)
CONTACT SPRING
BENDER
(Front View)
Min
2 oz---Max 6 oz----------------,
to move each spring away from backstop.
To Adjust
Bend marking contact springs.
Note 4: To increase tension of marking
contact spring, it may be necessary to
bend backstop away from spring, bend
spring and then rebend backstop to meet
requirement of MARKING CONTACT
BACKSTOPS
adjustment (above).
Page 84
I lrtf-MARKINGCONTACT
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1
SPRING
(Front View)
-SWINGER CONTACT
SPRING
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