IBM Selectric Reference Manual

6
c
II
Figure 8. Operational Mechanism
IBM #10
1. Right-hand margin-rack bushing
2. End-of-I ine contact-actuating pivots
3. Escapement-cam-follower roller
4. Print-shaft bearing
5. Escapement clevis
6. Spring-clutch arbor. Oil carriage ref'urn spring clutch
only when reassembly is necessary
7. Index pawls
8. Tab-torque-bar pivot
9. Power-tab be II crank-I ink ends and pivots
10. Feed-roll bearings
11. Escapement-shaft bearing
12. Operational cam and RH bearing
13. Operational cam pivot
IBM #23
A. Operational-cam surfaces, rollers, and drive ratchets
B. Actuating arm and check-pawl contact surface
C. TorquC'-limiter spring clutch
1-9
PRI NTER CONTACT LOCATIONS
Figures 9 to 13 show the I ocat ions of the pri nter contacts.
CONTACT AND
LATCH ASSEMBLY
Figure 9. Bottom View Showing Contact Location
CARRIER -RETURN
INTERLOCK CONTACT
.. 1,
~ I
FEEDBACK SHIFT
CONTACT TRANSMIT
(C3, C4 CONTACT
Figure 10. Right View Showing Contact Location

IBM Selectric Specifications

General

Type	Electric typewriter
Introduced	1961
Keyboard Layout	QWERTY
Carriage Return	Electric
Manufacturer	IBM
Printing Technology	Typeball (golf ball)
Power Source	AC Power
Power Supply	120V AC