The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 16, 2002
Filed:
Apr. 28, 2000
John R. Raposa, Warren, RI (US);
Daniel P. Thivierge, Warren, RI (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
A device for controlling a strobe light in underwater high speed photography in a first aspect includes a plurality of spaced break screen or sense coil members, a projectile for launch through the series of break screen or sense coil members, a camera having a shutter opened at a predetermined timing prior to release of the projectile and closing at a predetermined timing subsequent to release of the projectile, and a strobe light opposed to the camera for illumination at a time when the projectile passes in front of the camera. A trigger device, such as a break screen or sense coil, is positioned immediately up-range of the camera. With a time delay programmed into a Programmable Array Logic (PAL), a control circuit receives the trigger information and creates a timed signal to control the illumination of the strobe light. In accordance with another aspect of this invention, the control circuitry includes discrete logic devices programmed such that illumination is controlled by the control circuitry at the exact moment the projectile passes the lens of the camera.