Teletype 28 - (Preliminary)

SECTION 573-118-?00TC
CONTENTS
Code
Reading Contact Mechanism
(Make-Only and Transfer Types)
Contact bracket (preliminary)
PAGE
(make type only). . . . . . • . . . • • • • •
88
Contact bracket (preliminary)
(transfer type) . . . . . • • • • • . • • • . . 87
Contact mounting bracket . . . . • • . • 86
Contact mounting plate • . . • • . • • • . 86
Marking contact backstops . • • . . • . . 84
Marking contact springs
(preliminary) . . . . . . . • . . • • . . • • 84
Spacing contact backstops (prelim-
inary) (transfer type only) . . . . . . . . 85
Spacing contact springs (preliminary)
(transfer type only) . . • . • . . . • • . • 85
Swinger contact springs
(preliminary) . . . . . . . . . . . . • . . . 85
Contact Timing Measurements
Code reading contacts ....••••.. 94, 95
LETTERS- FIGURES contact test • . . 98
Timing contacts .•.•••..••.•.. 96, 99
To zero test set ..•••...••...• 93, 99
End of Feed Out Timing Contacts for
Noninterfering LTRS and BLANK
Tape Feed Out Mechanisms
Contact assembly. . . . • • . • • . . • . • 129
Contact assembly mounting bracket . . 130
Contact spring gap (preliminary). . . • 129
Contact swinger (preliminary) • . . . . 129
Latchlever spring . . . • • . • • • . • • • 129
Tape length adjusting plate . . • • • • • 130
External Manual Interfering LTRS
Tape Feed Out Mechanism
Arm . . . . . . . . . . . . . . . . . . . . . . 133
Lever • . . . . . . . • . . . . • • • • • • • • 133
LTRS-FIGS Contact Mechanism
(Later Design)
Lower contact spring . . • • • • • • • • • 92
Middle co~1tact spring • • • • • • • • • • • 92
Mounting bracket • . . . • • • • • • . • • . 92
Operating lever spring . • • • • • • • • • 92
Manual and Power Drive Backspace
Mechanism (For Chadless Tape)
Armature bail spring (early design) • • 110
Bellcrank spring (early design) . • • • 110
Page 4
CONTENTS
PAGE
Drive arm (preliminary)
(early design) . . . . . . . . . . . . . . . . 108
Feed pawl adjusting plate . . . . . . . . 103
Feed pawl eccentric (preliminary}. . . 104
Feed pawl spring (early design) . . • . 110
Gear segmeut spring (early design) • . 110
Latch extension spring (power
drive only} (early design). . . . • . • . . 110
Latch spring (early design) . . • . . . . 110
Rake . . . • • . . . . . • . . . • . . . . . • • 102
Return latch . . . . . . . . . . . • . • . • • 104
Manual
and Power Drive Backspace
Mechanism (For Fully Perforated
Tape)
Armature hinge (early design) . • • . • 106
Backspace pawl clearance . • . . • • • . 105
Backspace ratchet . . . . . • . . • • • . . 105
Feed pawl eccentric (preliminary). . . 106
Manual
and Solenoid Operated
Interfering LTRS Tape Feed
Out Mechanisms
Drive shaft rear bearing . . . . • • • . . 131
Trip lever - manually operated . . . 132
Trip lever - solenoid operated . • . • 132
Trip lever spring. . . • . . • . . . . . • . 132
Manual
Print Suppression
Mechanisn1 . . . . . . . . . . • . • . • • • • 147
Multiple Mounted
Function Blade
Contact Mechanism
Normally closed contact . • • . . . . . . 137
Normally open contact gap. . . • . . • • 137
Print Suppression on Function
Mechanism
Print hammer stop (final) . . . • • • . • 101
Print hammer stop (preliminary) . • • 101
Power Drive Backspace
Mechanism (Early Design)
Latch. . . . . . . . . . . . . . . . . . . . . . 109
Nonrepeat arm. . . • • • • • • • • • • • • • 109
Power Drive Backspace Mechanism
(For Fully Perforated Tape)
Armature bail spring (early design). • 111
Armature latch spring (early
desigtl} . .................... 111
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