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Figure 48. Tab Mechanism
lever is mounte9 to the governor control bracket so that it can
move upward to raise the left end of the tab lever during mar-
gin release, and can also rotate to bring the left end of the tab
lever forward during tablulation. The latter action causes the
tab lever to rotate about its pivot stud and the right end moves
toward the rear of the machine.
As the ri ght end of the tab lever moves toward the rear, the
following seven things happen almost simultaneously,!
1.
The tab lever leaf spring moves the rebound check lever
to the rear where the lever is latched in its operated
position over a pin on the rebound check bracket (Fig.
49) •
2.
The pawl release hook contacts the rear upright lug on
the pawl release lever, causing the pawl release lever
to rotate and remove the escapement pawl from the rack
(Fig. 50). This frees the carriage to travel to the left
under power of the mQin spring.
3a.
The governor control lever is rotated by the left end of
the tab lever until the governor pawl link moves the
governor pawl into engagement with the friction gover-
nor plate (Fig. 51). This stops the rotation of the gover-
nor plate, which is spring loaded against a piece of
24
Margin Control
lever
\
Rebound Check
Interlock
at rest
Rebound Check Lever in operated position
Rebound Check Interlock operated
(Clutch Latched).
Figure 49. Rebound Check Lever Operation
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