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