Protective cover, radiation shield and test unit for helicopter

Details Protective cover, radiation shield and test unit for helicopter Protective cover, radiation shield and test unit for helicopter

1994-04-25

1996-04-23

Barefoot, Galen L.

Aeronautics and astronautics

Aircraft, heavier-than-air

Helicopter or auto-rotating wing sustained, i.e., gyroplanes

416 61, 116267, 73 38, 2503581, B64C 2700

Patent

active

055096220

ABSTRACT:
A cover for a pressure sensor for indicating cracks in a hollow aircraft blade, the sensor having a shaft carrying a radiation source, with the shaft sliding in a housing between a first position with the radiation source within the housing and a second position with the radiation source external of the housing, the cover including a sleeve for positioning around the sensor and having an open end for engaging a shoulder of the sensor and having a closed end spaced from the sensor when the open end is engaging the sensor shoulder, and a plunger slidably mounted in the closed end and movable between an outer position and an inner position, with the plunger out of engagement with the sensor shaft when in the outer position and engaging the sensor shaft when in the inner position to move the shaft into the sensor and reset the sensor, with the sleeve being of a material absorbing the radiation of the source.

REFERENCES:
patent: 4010708 (1977-03-01), Keledy et al.
patent: 4026153 (1977-05-01), Silverwater
patent: 4499846 (1985-02-01), Bergeron et al.
patent: 4651670 (1987-03-01), Silverwater
patent: 4681061 (1987-07-01), Dvorak et al.
patent: 4867095 (1989-09-01), Shane et al.

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