AT&T Bell System Plant Series Adjustment Procedure

BELL SYSTEM PRACTICES
Plant Series
SECTION 032-721-701
Issue 2-D. September, 1961
AT&TCo Standard
1.
KEYS
519-TYPE
REQUIREMENTS AND ADJUSTING PROCEDURES
General
1.01 This section covers 519-type keys.
1.02 This section is reissued
porate material from the
in its proper location.
process marginal arrows
omitted.
to incor··
addendum
In this
have been
1.03 Reference shall be made to Section
020-010-711, covering General Re-
quirements and Definitions for
additional info~mation necessary
for the proper application of the
requirements listed herein.
1.04 Part 1 "General" and Part 2 "Re-
quirements• form part of the
Western Electric Co. Inc. Installa-
tion Department Handbook.
1.05 Requirements are marked with an
asterisk (*) when to check for them
would necessitate the dismantling
or dismounting of apparatus, or
would affect the adjustment involved
or other adjustments. No check need
be made for these requirements un-
less the apparatus or part is made
accessible for other reasons or its
performance indicates that such a
check is advisable.
1.06 The operated position of a spring
assembly is that position in which
the normally open contacts are
closed and the normally closed
contacts are open.
1.07 The unoperated position of a spring
assembly is that position in which
the normally open contacts are open
and the normally closed contacts
are closed.
1.08 The normal (unoperated) position of
a plunger is that position in which
the plunger locking or stop cone
rests flat against the bearing plate
or buffer plates, and the spring
assemblies are unoperated.
1.09 The operated position of a locking
plunger is that position in which
the plunger locking or stop cone
rests under and against the slide
plate or roller and is held de-
pressed by the slide plate; in this
position the spring assembly is
operated.
1.10 The normal (unoperated) position of
a rotating plunger type key is that
position in which the plunger
springs rest against the wider sur-
face of the plunger and the spring
assemblies are unoperated.
1.11 The operated position of a rotating
plunger type key is that position in
which the plunger springs rest
against the narrower surface of the
plunger and the spring assemblies
involved are operated.
©American Telephone and Telegraph Company, 1961
Printed in U.S.A.
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