Teletype 28 - Page 109

,~
""
~
ISS 8, SECTION 573-118-700TC
3. 29 Power Drive Backspace Mechanism (Early Design) (continued)
OPERATING LINK~
TAKE UP PLAY IN
omECTION SHOWN i
LATCH EXTENSION SCREW
LATCH EXTENSION
(§)
0
\
0e0
(B) NONREPEAT ARM
Requirement
Backspace mechanism in unoperated
position. Clearance between top sur-
face of nonrepeat arm and lowest point
of latch extension
I Min 0.002 inch---Max 0.010 inch
To Adjust
With arm screw friction tight, position
adjusting arm. Tighten arm screw.
LATCH EXTENSION
Note 2: ·Must not be oper-
ated with latch against
:trmature extension.
LINK SHOWN IN ITS HIGHEST
POINT OF TRAVEL.
LATCH
Requirement
Backspace mechanism in unoperated
position, armature off pole face (de-
energized), latch extension against end
of armature, eccentric arm at its
closest point to under side of latchlever.
Clearance between latch and eccentric
arm with play in the links taken up to
make the clearance a minimum
should be
Min 0.005 inch---Max 0.025 inch
To Adjust
With latch extension screw friction
tight, position latch. Tighten screw.
Note 1: On units equipped with one
piece nonadjustable latchlever the
requirements in the Final Power
or Manual (3. 32) must be met.
(Front View)
ADJUSTING ARM
NONREPEAT ARM
Page 109