Bell & Howell - Projector - Filmosound 641 - 642 ... - Cine Information
Bell & Howell - Projector - Filmosound 641 - 642 ... - Cine Information
Bell & Howell - Projector - Filmosound 641 - 642 ... - Cine Information
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over the spline of the rear reel arm so that<br />
the small notch is centred at the 3 o'clock<br />
position. Install the speed nuts (46) over<br />
the reel arm bearings with the convex side<br />
of the nuts away from the main plate.<br />
Press the speed nuts in place.<br />
b. Assemble the reverse take-up<br />
sprocket (43) and washers (44) and (45)<br />
onto the front reel arm shaft. Install the<br />
retainer (42) with the formed legs out,<br />
over the reel arm shaft and into the<br />
counterbore of the sprocket. Assemble<br />
the clutch cam (41) against the retainer so<br />
that the three notches in the cam straddle<br />
the three legs of the retainer. The shallow<br />
end of the notches must point in a counterclockwise<br />
direction. Rotate the cam<br />
counterclockwise against the legs of the<br />
retainer and insert a steel ball (40) between<br />
each of the three pairs of legs on the<br />
retainer. Insert the spring (39) into the<br />
radial slot of the cam so that the spring<br />
tends to rotate the cam in a clockwise<br />
direction. Install the rewind sprocket (37)<br />
and collar (36) onto the reel arm shaft so<br />
that the tongue of the collar enters the<br />
groove of the sprocket. Insert a 0.003 inch<br />
shim stock between the washers (45) and<br />
(44). Press all parts together and tighten<br />
27<br />
the set screws (35). Remove the shim<br />
stock.<br />
c. Assemble the rear reel arm parts<br />
in a manner similar to the front reel arm<br />
parts (step 'b') except that the shallow end<br />
of the notches in the cam (31) should point<br />
in a clockwise direction and the spring (29)<br />
must be installed so that it tends to rotate<br />
the cam in a counterclockwise direction.<br />
d. Refer to Figure 3. Install the reel<br />
arm lock plungers (41) springs (40) and<br />
brackets (39) with screws (38). The narrow<br />
portion of each lock plunger bar must rest<br />
on the flange of the reel arm lock discs.<br />
The groove in each bracket (39) must<br />
straddle the narrow portion of the bar.<br />
e. Install the timing belt over the<br />
small sprocket of the mechanism assembly,<br />
around the large sprocket of the front reel<br />
arm, and around the reel arm sprocket.<br />
Adjust the roller tension as instructed in<br />
paragraph 50.<br />
f. Perform all necessary adjustments<br />
and alignments as directed in the Adjustment<br />
section.
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