IBM Selectric Reference Manual

OPERATIONAL CONTACT AN.D LATCH ASSEMBLY ADJUST-
MENTs (UNIT REMOVED)
1.
2.
3.
Contact Strap Position (Fig. 174) - 'With the contacts
latched, posi ti on the straps under the two mounti ng
screws
for the following conditions:
Latches Centered
On alP Stops
Latchr
t
O/P Stop
FI GURE 174. Contact Air Gap
a. Latches centered on O/P stops.
b. Vertical alignment of mating contacts.
c. All contacts of each stack must Ii e in the same
horizontal plane (individual forming may be re-
quired .)
Contact Air Gap (Fig. 174) - Rotate the contact mount-
i ng bracket under its fou r screws for .015 II to .020 II
contact air gap'" see Fig. 175 for mounting screws.
Normally O~en Contact Rise (Fig. 175) - With the con-
tacts unlatc ed, form the N70 straps for .005" minimum
rise.
~~-
Latch (Unlatched)
Llil
Interposer
(Un latched)
4.
FI GURE 175. N/O Contact Rise
Latch Stop (Present on Late Models) Fig. 176 - Position
so that the end of the O/P stops are flush with the for-
ward latch surface.
2-61
NOTE: Form individual latches as required in the
area shown in Fig. 176.
Surfaces
Flush
O/P
latch
Form Latch
In This Area
FIGURE 176. Latch Stop
OPERATIONAL
CONTACT AND LATCH ASSEMBLY ADJUST-
MENTs (UNIT INSTALLED)
la. Assembly (with latch stop) Position (Fig. 177) - With
the operational interposer released, position the unit
(front to rear) so that the latches clear the O/P stop~
by .005" to .015".
Interposer
(Unlatched)
Form La tch _<
In This Area
°/P-.....,j"j,-(
FIGURE 177. Assembly Position (With Latch Stop)
lb. Assembly (without latch stop) Position (Fig. 178) - With
the contacts latched, position the assembly (front to
rear) for the following inter-related conditions.
a. The latch just touches the interposer extension.
b. The forward latch surface is flush with the end of
the alP stop.

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