Teletype 28 Manual

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TELETYPE CORPORATION
Skokie, Illinois, U.S. A.
SECTION 573-118-700TC
Issue 8, November 1972
28 TYPING REPERFORATOR AND TAPE PRINTER
ADJUSTMENTS
CONTENTS PAGE
1. GENERAL . • • . • • • • • • • • • • • • • • 6
2. BASIC UNITS . • • • . • • • • . • • • • • • 11
Chad Chute Assemblies for Fully
Perforated Tape
Chad chute (self-contained typing
reperforator set) . . • • • • • . . • . • . . 78
Chad chute assembly (auxiliary
reperforator - ASR Set). . • . . . . • • 79
Chad chute assembly (keyboard
reperforator - ASR Set). . • . • • • . . 79
Chad chute assembly (multiple
reperforator set) . . . . • . . . . • • . • • 78
Function Mechanism
Cam follower lever spring (early
design) ......••..•.••••••••.
Cam follower lever spring (latest
design) . . . . • • • . . . . . . • . • . • • . •
Cam follower roller .•...•.••.••
Cam follower roller alignment •••..
Clutch shoe lever ....••.•.••.•.
Clutch shoe lever spring ..•••••••
Clutch shoe spring .••••.•••••••
Function clutch drum endplay .••.••
Function clutch latchlever spring .••
Function clutch release lever
spring ..•. · .••••••••••••••••
Function clutch trip lever .•••••••
Release lever downs top bracket • • . •
Reset arm •.••••.•..••••••••
Reset bail trip lever (final) ••••.••
Reset bail trip lever spring
(early design) ..•.•••••••.•.••
Reset bail trip lever spring
(latest design) ••••.•.••..•••••
Trip cam follower lever
(preliminary) . • • . . • . • • • • • • . • •
Punch Mechanism
Detent lever spring .•..•.•••.••
Feed pawl ...•.•.•..••••••.••
Feed pawl spring ...••••••••.••
26
27
28
28
11
12
12
11
25
49
24
49
25
34
26
26
26
46
35
46
CONTENTS
PAGE
Latchlever clearance . . . . . . . . . . . 35
Perforator drive link spring . . . . . .
31
Punch mounting plate (final). . . . . . • 30
Punch mounting plate
(preliminary) . . • . . . . . . . . . . . . . 29
Reset bail trip lever (final) . • . • . . . 34
Tape depressor slide spring . • . . . . 47
Tape guide (early design) . . . . . . . . 47,48
Tape guide (latest design) . . . . . . . . 48
Tape guide spring . . . . . . . . . . . . . 48
Tape shoe torsion spring. . . . . . . . .
4 7
Toggle bail eccentric
(preliminary) . . . . . . . . . . . . . . • . 31
Toggle operating arm . . . . • • . . . • . 31
Punch Mechanism for Chadless Tape
Bias spring (punch block) . . . . . . . •
Bias spring (tape chute) . . . . . . . . .
Detent lever . • . . . . . • . . . . . • • • .
Feed hole lateral alignment . . . • . . .
Punch pin penetration . . . • • . • • . ••
Punch slide downstop plate
position . . . . . . . . . . . . • • • • . • • •
Punch slide guide . • . . • . • • . • • . . .
Punch slide spring . . . • .
L . • • • . .
Reperforator mounting . • . . . • • • . .
Retractor bail springs . . . . . . • . . •
Tape guide assembly spring . • • • . . .
Ten characters per inch (final) ..•.•
Ten characters per inch
(preliminary). • . . . • • • • • . • • • • • .
Punch Mechanism for Fully
Perforated Tape
Bias spring (punch block) •••.••.••
Bias spring (tape chute) •••.••••••
Punch pin penetration ..•••••••••
Punch slide downstop
position . . . . . . . • . • . • • • • • • • • •
Punch slide guide {final) .•..•••••
Punch slide latch spring . . . . • • . • •
Punch slide spring . • . . • • • • • • • • .
Tape guide assembly spring ••.•••
40
40
37
38
32
32
32
39 '
36
39
40
36
36
45
45
33
33
33
27
45
45
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All rights reserved
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