Method and apparatus for measuring performance times of a shutte

Details Method and apparatus for measuring performance times of a shutte Method and apparatus for measuring performance times of a shutte

1976-10-01

1977-12-27

Woodiel, Donald O.

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

G04F 710

Patent

active

040647366

ABSTRACT:
A method and apparatus for measuring times for leading and trailing curtains of a camera shutter apparatus to traverse a focal plane aperture, an exposure time determined by the initial width between the two curtains, a photoflash delay time measured between the time the leading curtain begins the traverse and the time a photoflash apparatus is energized, and a change in exposure time between the beginning and the end of the traverse of the curtains. The invention may also measure certain bladed type shutter apparatus performance time characteristics. The invention involves a display means for displaying the times measured and a selection means for selecting among the various times measured for display.

REFERENCES:
patent: 3603133 (1971-09-01), Westhaver
patent: 3913376 (1975-10-01), Scott

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