Operational Contact Assembly (Late Style) - IBM Selectric I/O Manual Of Instruction

pushes the top of the latch to the rear. This is accomplished
by an arm on the interposer that extends down in front of the.
latch.
As
the top of the latch is pushed to the rear, the
latch pivots on the shaft causing the lower end of the latch
to move to the front. As the interposer restores, the latch
restores by its spring tension (Fig. 127).
OPERATIONAL CONTACT ASSEMBLY (Late Style)
This assembly is comprised of five sets of contacts, each set
being in a seperate molded block and having its own latch
(Fig. 127.
1) •
• FIGURE 127.1 Operational Contact Block Assembly
The contacts are normally closed contacts held open by an
actuator. As the actuator moves outward the contacts are
permitted to make. (Fig. 127.2)
There are two contact actuating bai Is. One is operated by
the carrier return-index contact actuating cam and called
the right hand contact actuating bail. The other is operated
by the backspace-spacebar-tab contact (lctuating bai I.
Both of these bails are operated through linkage from the
actuating cams. (Fig. 127.3)
Contact Actuator
Contacts Closed
Actuating Bail
Contacts Open
•
FIGURE 127.2 Contact Operation
Cam Follower
Operational
Link
Pivot
• FIGURE 127.3 Actuating Bail
Oper~ted
By Actuating Cam
50. 1