Accession Number : ADD003682

Title :   Traction Sheave Warning for Helicopter Rescue Hoist Systems.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Schmitmeyer,Steven H ; Strayer,James W

Report Date : 01 Feb 1977

Pagination or Media Count : 6

Abstract : A helicopter rescue hoist-traction sheave assembly including a hoist cable engaging sheave and first housing, a drive motor having a drive shaft mounting the sheave and a second housing mounting the motor and positioned in adjustable relation to the sheave housing, a rocker arm fixed to the motor-mounted housing, an alarm switch located near the rocker arm, and a torque compensating spring attached to, and normally retaining the rocker arm in a neutral position out of engagement with the switch when the drive motor is applying a normal amount of traction to the cable through the sheave and automatically moving the rocker arm to an engaged position with, and closing the switch in the event of a malfunction resulting in a substantial reduction in the motor-applied traction. (Author)

Descriptors :   *Patents, *Helicopter hoists, *Warning systems, Sheaves(Drives), Rescue equipment, Indicator lights, Malfunctions, Electric switches

Subject Categories : Helicopters
      Escape, Rescue and Survival

Distribution Statement : APPROVED FOR PUBLIC RELEASE