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HANDBOOK OF PROJECTION FOR
and either make a special tool or secure an offset screwdriver for taking out the two screws at upper end of spring. The spring is the flat steel spring which extends down from the casting which forms the bearing for the upper sprocket shaft. Its lower end curves and engages the end of the idler
bracket arm. The two holding screws are right opposite the end of the upper sprocket.
To replace this spring close the idler up against the sprocket and be sure you tighten the holding screws down solidly.
INSTRUCTION NO. 35.— T O REMOVE THE LOWER S P ROCKET IDLER BRACKET SPRING. — It is only necessary to remove one screw. The spring engages with the casting forming the bearing of the main crank shaft. You cannot see the screw when the mechanism casing is in place, but you can feel it. You may take off front casing C-159-C to get at the screw, but by exercising a bit of patience you can remove and replace it, if you make a special screw-driver by breaking off an inch of an old hack-saw blade and grinding one end to a point, or (better) you may secure an offset screw-driver from Simplex distributor. In replacing the screw be sure you set it up tight.
INSTRUCTION NO. 36.— SETTING THE REVOLVING SHUTTER.— See General Instruction No. 22. The blade stamped "Simplex," or in the case of the Extralite, "Extralite Cutoff Blade" is the master blade. General Inst'n No. 22, P.644. will inform you fully as to the principle involved in shutter setting. Having studied general instruction thoroughly, so as
Figure 261