Cable Control Variations

There are several modifications to increase dual control function

1. Excursion amplifiers
2. Nudge control unit
3. Waist band
4. Modifications to lift tab

Excursion Amplifier

A pulley acts as a lever. With the fulcrum at f the moment exerted by F must equal the moment exert by W.^[1]

Remember – if you increase the efficiency of the excursion, you require twice the force to power the system

Force amplifier used when ample excursion is available. 5 lbs of force will lift 10lbs of weight. While F travels 4 inches, W will travel only 2 inches.

Excursion amplifier used when ample force is available. 5 lbs of force will lift only 2 ½ lbs of weight but F travels 2 inches while w travels 4 inches.

Nudge control unit 

Lever is coupled with a control cable so that pressure on it causes the cable to retract in its housing, and so trips the elbow lock.

Waist band

Modifications to lift tab