Technical FAQs

Ask a Question

How does the "Dead man's switch" or "Dead man's handle"position work on a controller handle?

Technological description

The handle grip comprises a fixed part (lower section) and a moving part (upper section).
Action on the upper part of the handle grip drives a sliding rod inside the control lever.
This rod actuates a moving retainer which causes a change in electrical state of the contact element on the lower part of the mechanism, regardless of the position of the control lever.
 

Operation

In normal operation, the operator must maintain pressure on the handle grip to operate the machine.
If the operator feels ill and passes out, he/she will release pressure on the grip and, even if they are still holding on to it, the electrical contact will have changed state, thus rendering any further action on the grip to control the machine ineffective.

Was this helpful?
What can we do to improve the information ?