-55-
(B-138)
SAFETI PAvVL
SPRING
TENSION (Figure 85B)
Hook
an
8
oz. scale over the end of the lower extension on the safety
pawl
and
pull at right angles to the extension.
It should require
1-1/4
to
2-1/4
ozs. to start the pawl moving.
SEND-RECEIVE-BREAK
CONTACT
SPRII'GS ADJUSTilENT
(Figure 850)
Viewing the base from the front, the send-receive-break contact
springs are numbered
1, 2, 3, 4,
5,
and 6
from left to right.
v
(A)
Move the send-receive lever to the
SEND
position (up).
(l) All contact points should meet across their entire surface.
(2)
There should be some clearance, not more than
.00411,
between t.he
fibre insulator on the lower end of contact spring No.
4
and
the
lower contact lever to the right of it.
Adjust
b,y
bending contact
spring No.
4.
(3)
There should be a clearance of'
.015•
to
.020"
between contacts No.
3
and No.
4•
No. l contact should not bear against No.
3.
Adjust
by
bending contact spring No.
3.
(4)
Contact No. l should exert a pressure against contact No.
2. Hook
an
8
oz. scale around contact spring No. l just below the contact point
and pull horizontally to the lef't. It should require
3
to
4
ozs. to
just separate the contacts. Adjust
by'
bending contact spring No.
1.
(5)
There should be a slight clearance, not more than
.004",
between the
f'ibre insulators on springs
No.
1
am No.
3.
Adjust
by
bending con
tact spring No.
2
and recheck the pressure of' spring No.
1.
(B)
Move the send-receive lever
to
the
RECEIVE
pos ition (down).
{1)
With the lef't end of' the upper contact lever held against the notch
in the safety pawl, the fibre insulator on the No.
6
contact spring
should clear the upper extension of the upper contact lever
by
.01S11
to
.020".
Adjust
by bending
contact spring No.
5.
(2)
Contact spring
No. 6
should exert a pressure on spring No.
5.
Hook
an
8
oz. scale around contact spring No.
6
just above the contact
point and pull horizontally
to
the right.
It should require
4-1/2
to
5-1/2
ozs. to just open the contacts. Adjust
b,y
bending contact
spring No.
6
and recheck the clearance between t he upper contact
lever extension and the fibre insulator on the No.
6
contact spring.
THE
FOLLOtfiNG
S 1 X
ADJUSTMENTS APPLY ONLY
TO TYPING
UNITS
WITH
SEND-R�EIVE
BREAK
Ml!£HANISJ4:
HAVING
TWO UPPER
CONTACTS
STOP LEVER PLATE ADJUSTMENT (Figure
86A)
With the left end of the upper contact lever held up against the stop
lug on the stop lever plate, there should be
.00411
to
.015•
clearance between