Blade type shutter
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United States of America Patent
Stats
-
Apr 28, 1987
Grant Date -
N/A
app pub date -
Mar 4, 1985
filing date -
Feb 23, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a focal plane shutter of the kind having a plurality of divided blades pivotally arranged to be turnable on driving arms in an overlapped state, the weight of the blades is reduced by making them from very thin material; the blades are reinforced with embossed protrusions which are formed in the longitudinal direction of the blades for the purpose of preventing them from flexing and being damaged during their travel. Each of the embossed protrusions is within the difference in stepped height between the surfaces of the blades and the heads of blade carrying studs disposed on the driving arms. Therefore, the shutter can be smoothly operated without increasing the thickness of the blades as a whole.
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Family
International Classification(s)
Cited Art Landscape
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