Title: Apparatus for determining projectile position and barrel pressure characteristics

Abstract: Measurement and correlation of chamber pressure and projectile position d is accomplished using an array of phototransistors, illuminated by collimated light, which phototransistors are sequentially switched off due to the interruption of the collimated light by the passing projectile. Pulses generated thereby may be displayed on an oscilloscope along with the pressure-time trace.

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Inventors: Wood, Stanley E. (Inyokern, CA, US)
Moore, Kenneth L. (Tallahassee, FL, US)
Black, William L. (China Lake, CA, US)

Application Number: 860814
Filing Date: 1977-12-15
Publication_date: 1979-04-03
Assignee: The United States of America as represented by the Secretary of the Navy (Washington, DC)
Primary Class(es): 73/167
Other Classes:
US Patent Ref:

53582	Apr, 1866	Coursey	102/DIG.
2475387	Jul, 1949	Golden	73/167.
2482184	Sep, 1949	Hoffman et al.	324/178.
2641458	Jun, 1953	Gilvarry	324/178.
2820412	Jan, 1958	Beeuwkes	102/93.
3127768	Apr, 1964	Mason	73/167.
3675030	May, 1972	Tanenhaus	324/178.

Other Refs: 956179272954

, 1974	CA
, 1930	IT

Primary Examiner: Swisher, S. Clement
Assistant Examiner:
Attorney: Sciascia; R. S., Skeer; W. Thom, Schulte; T. R.