AT&T Bell System Plant Series Adjustment Procedure page 4

I
SECTION 032-721-701
Fig.
6
Plunger-----
Plunger
Rete.inir..e:
Screw----
Outer
Cent act
Springs---~~~~~~
Inner
Contact
Springs-----~~~•
Insulators
Spring
Asse1nbly
Mounting
Screw ___ ____/
Page 4
Fig.
?
12.J6
I
~----*2.17
~-~~-----*2.18
I
I
~-----*2.20
Contact Ali~~ent Contacts shall ltBe
up so that
e point ot oontaot tall.a
wholly within the ciroumterence ot
~
opposing contact disc.
Geuge by
eye.
Sprin~
Clearance There shall
be
a clear-
anceetween springs designed never to
make contact and between any spring and
the trame whether in the operated or un-
operated position or the key ot:
Tes~ - Min •• 014"
Reiii'Just - J.lin •• 016"
Ge.uge by eye.
Contact Separation Unless otherwise
specified, the separation between
any
pair or contacts nor~ally open or be-
tween any pair or contacts that are
opened when the key is operated shall be:
Test - J.lin •• 014"
lreiiiiJust - Min •• Olo"
Gauge
by eye.
Contact Pressure Unless otherwise speci-
fied there shall be a pressure between
all closed contacts ot:
Test - :W.n.
50
grams
ReadJust - Min.
55
grams
Use the
68-13
gauge.
Flexible Contact Spring Position The
flexible contact springs shall rest on
their respective stop springs when the
plunger is in the unoperated position far
normally open contacts and in the operat-
ed position tor
norn~lly
closed contacts.
It is not necessary tor the spring to
rest on the stop spring for its entire
length but it ~ust rest on the end or
the stop spring nearest the contact.
Gauge by eye.
Plunger SEring Positio~ Both plunger
springs s all rest against the plunger
in the unoperated position. Gauge by
eye.
L------*2.21 Contact Follow
(a) Unless otherwise specified there
shall be a follow on all outside con-
tacts of:
Test - Yin ••
008"
ReadJust - !.lin ••
Ol:l"
Gauge by eye.
(b)
On
inside contacts the follow shall
be sufficient to insure that they
cannot be operated by any side thrust
of the plunger. Gauge by eye.