AT&T Bell System Plant Adjustment Procedure page 10

SECTION 032-714-701
the phosphor-bronze spring, of the unoperated
spring combination, when the roller on the
cam has operated the spring combination on
the opposite side of
Min 0.004", Max 0.022"
Gauge by eye.
Caution:
If
the phosphor-bronze spring is
not in accordance with this requirement; do
not attempt to adjust it.
(d) Fig. 19(B)- With the lever in the verti-
cal position where the key is equipped
with a
stra~ght
lever, or with the lever in
the intermediate position where the key is
equipped with an offset lever, the inclined part
of the crook spring should preferably be
pressed against the vertical part. However, a
slight airgap will be satisfactory provided the
inclined portion of the crook rests on the ver-
tical portion of the spring during the greater
part of the movement of the lever from the
normal to the extreme operated position where
the key is equipped with a straight lever, or
from the intermediate
to
the normal or way-
down position where the key is equipped with
an offset lever.
Gauge by eye.
*2.20
Relation of Plunger Springs to Cam and
Key Frame
(a) Fig. 21 (A) -The plunger springs shall
clear the cam by
Min 1/32"
Gauge by eye.
A)
' - - - - - l B )
Fig. 19- Illustrating Relation of Plunger Springs to
Roller and Cam
Page 10
Back
Contact
Spring---++--
_Jio.:---f+----
Crook
Plunger
Spring
Fig. 20- Illustrating Relation of Plunger Springs to
Roller and Cam
Fig. 21 -Illustrating Relation of Plunger Springs to
Cam and Key Frame
Fig. 22 - Illustrating Contact Alignment
(b) Fig. 21(B)- The vertical centerline of
each spring shall be approximately per-
pendicular
to
the keytop.
Gauge by eye.