johnnyh4
Early PRONTOR shutter CleanLubrication&Adjustment - 5
I recently got an early variant of PRONTOR shutter with a 75mm f4.5 Ensar lens, evidently from a unit-focussing Ensign camera.
After the customary flood cleaning, including a few minutes in an ultrasonic bath, the delay and escapement mechanisms were removed. Loose rust was removed; the remaining dark spots seen in the pictures are where surface rust was breaking through the plating of the metal surfaces.
After a frugal addition of Moebius 8000 watch oil to the various pivots, all seemed to be well except for the escapement sticking, exactly the same as was shown for another early Prontor shutter here. That was also labelled simply PRONTOR, and had a similar design of escapement, although there were differences elsewhwere, notable the orientation of the delay mechanism being transposed.
In the case of my shutter, I found it ran properly after I re-assembled it with the (symmetrical) escapement rocker turned upside-down.
Early PRONTOR shutter CleanLubrication&Adjustment - 5
I recently got an early variant of PRONTOR shutter with a 75mm f4.5 Ensar lens, evidently from a unit-focussing Ensign camera.
After the customary flood cleaning, including a few minutes in an ultrasonic bath, the delay and escapement mechanisms were removed. Loose rust was removed; the remaining dark spots seen in the pictures are where surface rust was breaking through the plating of the metal surfaces.
After a frugal addition of Moebius 8000 watch oil to the various pivots, all seemed to be well except for the escapement sticking, exactly the same as was shown for another early Prontor shutter here. That was also labelled simply PRONTOR, and had a similar design of escapement, although there were differences elsewhwere, notable the orientation of the delay mechanism being transposed.
In the case of my shutter, I found it ran properly after I re-assembled it with the (symmetrical) escapement rocker turned upside-down.