IBM Selectric

FIGURE 7. Operational Mechanism
IBM #10
1. Escapement-cam-follower roller
2. Print-shaft bearing
3. Escapement clevis
4. Spring-clutch arbor. Oil carriage return spring clutch
only when reassembly is necessary
5. Index pawl
6. Tab-torque-bar pivot
7. Power-tab bell crank-link ends and pivots
8. Feed-roll bearings
9. Escapement-shaft bearing
10. Operational shaft bearing
11 • Operational cam pivot (ratchet) (Use #23 when parts
are removed or repl.aced.)
FIGURE 8. Bottom View Showing Contact Location
1-8
Carrier-Return
Interlock Contact
FIGURE 9A. Right View Showing Contact Location
IBM #23
A. Operational-cam surfaces, rollers, and drive ratchets
B. Actuating arm and check-pawl' contact surface
C. Torque-limiter spring clutch*
*Every 6 months / 1 Shift Operation
Every 3 ,months / 2 Shift Operation
Every 6 weeks /3 Shift Operation
PRINTER CONTACT LOCATIONS
Figures 8 to 12 show the locations of the printer contacts.
FIGURE 9B. Right View Showing Contact Location