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Repeat/Non Repeat Key Levers
A
repeat/non repeat underscore is provided as standard equip'"
ment. A one piece repeat key lever, a plunger and a
spr~ng
ore
used with a standard cam unit to provide thi-s feature. The
keylever has a two step key I.ever lug. The front guide comb
has six positions where repeat/non repeat letter units may be
installed at the factory: 0, 8, 32, 36, 39, and 42 (Fig. 9).
Installation requires the removal of the rubber from the front
. guide comb where the repeat character is desired. Two dif-
ferent plunger springs are available; the lighter spring is to
be
used with key levers in the upper two rows.
Figure 17. Repeat/Non Repeat Key Levers
Escapement
Tr:jp Lever
When the repeat/non repeat key lever is depressed to the limit
of its normal travel, the rear step on the key lever lug will
provide a single operation ofthe cam (Fig. 17). If the key
lever is held down in this position, the rear step on the key
lever lug will prevent the trip lever from restoring. Further
depression of the key lever is allowed by the spring loaded
plunger. This will cause the front step of the key lever lug to
depress the trip lever for a repeat action of the cam. I f the
key lever is he Id down in this position, the trip lever wi II be
cammed down by the front step on the key lever lu"g, each
time the cam lever assembly restores from a former operation.
A special two piece key lever is used for field installation of
a repeat/non repeat character in any letter position desired
(Fig. 17).
This feature may be .crippled when a plunger and spring is used
by installing a plunger bushing in place of the compression
spring. It is necessary to replace the plunger with the space
,bar plunger in order for the bushing to be used.
ESCAPEMENT
The escapement mechanism controls movement of the car-
riage. The mechanism consists of the universal bar, escape-
ment pawl, and the escapement rack (Fig. 18).
The universal bar and universal bar support are fastened to the
back of the segment with two hex headed screws. Flexible
mounting springs connect the universal bar to the support and
position the universal bar against the back of the segment.
The escapement powl bracket is fastened to the rear rail with
Yigure 18. Escapement Mechanism
7
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