Tip-over switch on a space heater

Electronic Tip Over switches sense tilt over 360° of the vertical axis. A common use of Tip-Over switches is in portable domestic Electric heaters to prevent fire & shock. If the heater is tilted more than a specified angle, the Tip Over switch is used to switch off the heater. Once the heater is back in the upright position, the heater will resume function.

This also applies to a conventional tip-over nodule underneath of the device that when upright, depresses the nodule which allows the unit too turn on. When tilted, the nodule becomes undepressed and the unit shuts off. 

If the heater is an electronic unit, the tip over is electronic and internal and not a mechanical button on the external of the heater.