Control Cable Fail Safe Device.
DEPARTMENT OF THE AIR FORCE WASHINGTON DC
Pagination or Media Count:
A mechanical apparatus for retaining actuator control in the event of a failure in one of the two cables used to regulate a two cable quadrant type actuator. In response to a cable failure, the mechanism transforms the dual cable system into a tension loaded single cable configuration. Operationally, the failure of a cable releases its associated quadrant, which then rotates in response to a tension device acting between the two quadrants until it is driven against a fixed stop. The onset of the quadrant rotation actuates a quadrant lock device to prevent relative motion between the operable quadrant and the output actuation means. The tension device connecting the two quadrants now acts between the inoperable quadrant, resting against a fixed stop, and operable quadrant, such that the operable quadrant has a force tending to rotate it whenever the control cable tension is not balanced by the effects of the tension device. Author
- Machinery and Tools