Polaroid Joshua Captiva, Service Manual

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Blocking the Viewfinder
The motor is momentarily run in reverse, rotating the Recock Latch a short distance counterclockwise
(Figure 2-15). (The Latch, on the same shaft as the Clutch Gear, is turned by the leg of a one-way-slip wrap
spring on the hub of the Clutch Gear. When the motor reverses the Clutch Gear, the spring tightens on its
hub and turns with it, also turning the Recock Latch. When the motor runs forward for the processing
cycle, the spring slips and has no effect.)
Figure 2-15. Recock Latch Rotation by Clutch Gear Spring Leg
Motion of the Recock Latch is transmitted to the Viewfinder Blind through the Viewfinder Blind Link and
the Viewfinder Overtravel Spring (Figure 2-16).
When the Latch turns counterclockwise, the Viewfinder Blind Link is driven to the right, rotating one leg of
the Blind Overtravel Spring. The Spring, in turn, pivots the Viewfinder Blind upward, covering the
Viewfinder window completely before the Recock Link (and the Taking Mirror) begins to move.
The Viewfinder Blind comes to rest against the upper edge of the Viewfinder Window, however, before the
Recock Latch has finished its rotation. To accommodate this, the Blind Overtravel Spring opens up further.