Teletype 28 Manual

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TELETYPE CORPORATION
Skokie, Illinois, U.S. A.
SECTION 573-115-700TC
Issue 7, February, 1966
28 TYPING UNIT
ADJUSTMENTS
CONTENTS PAGE
1. GENERAL • . . . . . . . . . . . . . . . . . . 5
UNMOUNTED POSITIONS OF
TYPING UNIT . . . . . . . . . . . . . . . . 6
OPERATING CONDITIONS OF
CLUTCHES.................. 6
MANUAL SELECTION OF
CHARACTERS OR FUNCTIONS. . . . . 6
VARIABLE FEATURES. . . . . . . . . . 7
EARLIER DESIGN MECHANISMS . . . 7
COMPLETE ADJUSTMENT OF
TYPING UNIT. . . . . . . . . . . • . . . . 7
2. BASIC UNITS. . . . . . . . . . . . . . . . . 8
Code Bar Mechanism
Code bar detent . . . . . . . . . . . . . . . 70
Code bar detent spring . . . . . . . . . . 70
Code bar shift lever link bracket. . . . 22
Code bar shift lever drive arm. . . . . 21
Code bar yield spring . . . . . . . . . . . 70
Common transfer lever spring. . . . . 19
Intermediate arm backstop bracket . . 20
Transfer lever eccentric . . . . . . . . . 19
Transfer lever spring. . . . . . . . . . . 19
Function Mechanism
Figs - ltrs shift code bar operating
mechanism . . . . . . . . . . . . . . . . . . 38
Function bar spring . . . . . . . . . . . . 59
Function contact spring. . . . . . . . . . 68
Function lever spring . . . . . . . . . . . 59
Function pawl spring. . . . . . . . . . . . 59
Function reset bail blade • . . . . . . . . 37
Function reset bail spring . . . . . . . . 37
Keyboard lock lever spring . . . . . . . 46
Stripper blade drive cam position . . . 62
Stunt box clip. . . . . . . . . . . . . . . . . 60
Unshift-on-space function pawl. . • . . 69
CONTENTS PAGE
Line Feed and Platen Mechanism
Left margin (sprocket feed) . . • . . . . 73
Line feed bar bell crank spring . . . . 61, 76
Line feed bar release lever spring . . 61
Line feed clutch phasing . . • . . . . . . 31
Line feed spur gear detent eccentric . 61
Line feed stripper bail spring. . • • . . 63
Paper finger (friction feed) . . . . . . . 67
Paper finger locking arm spring
(sprocket feed). . . . . . . . . . . . . • . . 77
Paper finger or guide bracket
(sprocket feed). . . . . . . . . . . . . . . . 75
Paper finger or guide bracket
latch spring (sprocket feed) . . . . . . . 77
Paper finger or guide bracket shaft
spring (sprocket feed) • . . . . . . . • . . 77
Paper finger spring (friction feed). . . 67
Paper guide (sprocket feed) . . . . . . . 76
Paper pressure bail spring
(friction feed) . . . . . . • . . • • . . . . . 67
Paper straightener collar
(friction feed) . . . . . . . • . • . • . . . . 66
Paper straightener lever spring
(friction feed) . . . • . . • . . . . • • . . . 66
Platen detent bail spring . . . . . . . . . 61
Platen end play (sprocket feed) . . . . . 7 4
Pressure roller lever spring
(friction feed) . . . . . . . . . . . . . . . . 67
Printing hammer stop bracket
(sprocket feed). . . . . . . . . • . . . . . . 7 3
Printed line (sprocket feed) . . . . . . . 7 4
Right margin (sprocket feed) . . . . . . 73
Single-double line feed stripper
bail assembly springs . . . . . . • . . • . 64
Sprocket pin separation
(sprocket feed). . . . . . . . . . . . • . . • 7 4
Sprocket pin spring (sprocket feed) . . 76
Main Shaft and Trip Shaft Mechanisms
Clutch drum position (except
selector). . . . . . . . . . . . . . . . • . . . 29
Clutch latch lever spring (except
selector). . . . . . . . . . • . . • • • . • . • 23
Clutch shoe lever . • . . . . . . . . • . • • 28
© 1953 and 1961 by Teletype Corporation
All rights reserved.
Printed in U.S. A.
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