Teletype 28 - Page 92

SECTION 573-118-700TC
3.12 LTRS-FIGS Contact Mechanism (Later Design) (For Earlier Design see 4. 05)
Note: To facilitate contact spring adjustment,
remove contact assembly from unit.
(B) LOWER CONTACT SPRING
Requirement
With upper side of contact closed
Min 0. 012 inch---Max 0. 020 inch-----.
gap at lower side of contact.
To Adjust
Bend lower contact spring.
LOWER CONTACT SPRING r;; ,
·,~'"1.~.:_;1:.; ~··~:~~~,?~
MIDDLE CONTACT SPRING
UPPER CONTACT SPRING
MOUNTING
BRACKET-..J
OPERATING LEVER--'
(Front View)
(C)
OPERATING LEVER SPRING LETTERS
PUSHBAR
Requirement
(A) MIDDLE CONTACT SPRING
Requirement
Min 25 grams--:-Max 40 grams
to open upper side of contact.
To Adjust
Bend middle contact spring.
OPERATWG
LEVER
SPRING
t
Min 1 oz---Max 2 oz-------------1
to start operating lever moving.
Page 92
UPPER
MOUNTING
SCREW
MOUNTING NUT
(D) MOUNTING BRACKET
Note:
Contact assembly should be mounted
on
unit before this adjustment is made.
Requirement
With unit in LETTERS condition and
function clutch disengaged
Min 0. 005 inch---Max 0. 015 inch----'
between operating lever and insulator on
middle contact spring.
To Adjust
With mounting nut and upper mounting
screw loosened, position mounting bracket:
Tighten nut and screw.