PHOTOSENSITIVE RELAY CONTROL CIRCUIT

Patent · Tue Jan 14 04:00:00 EST 1958

OSTI ID:4329411

Martin, C F

adapted for the measurement of the time required for an oscillating member to pass through a preselected number of oscillations, after being damped to a certain maximum amplitude of oscillation. A mirror is attached to the moving member and directs light successively to a photocell which is part of a trigger unit and to first and second photocells which are part of a starter unit, as the member swings to its maximum amplitude. The starter and trigger units comprise thyratrons and relays so interconnected that the trigger circuit, although generating a counter pulse, does not register a count in the counter when the light traverses both photocells of the starter unit. When the amplitude of oscillation of the member decreases to where the second photocell is not transversed, the triggei pulse is received by the counter. The counter taen operates to register the desired number of oscillations and initiates and terminates a timer for measuring the time irterval for the preselected number of oscillations.

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-12-007041
• Assignee: U.S. Atomic Energy Commission
• Patent Number(s): US 2820182
• OSTI ID: 4329411
• Country of Publication: United States
• Language: English

Related Subjects

ABSORPTION
CONTROL SYSTEMS
ELECTRON TUBES
OPERATION
OPTICAL SYSTEMS
OSCILLATIONS
PATENT
PATENTS
PHOTOELECTRIC CELLS
SCALERS
SWITCHES
THYRATRONS