Detecting vehicle movement using a washing machine pressure switch. The switch would be triggered by air pressure when the vehicle crosses a hose. Just remember to plug the end of the hose that's not connected to the switch! So there are four applications but there are lots more. It's certainly worth salvaging these very sensitive switches!
Excessive force can result in centrifugal stresses that could cause the appliance to move or walk across the floor. Most automatic washers are equipped with an off-balance or out-of-balance switch that stops the washer from spinning and causes a buzzing sound at any point in the cycle when an off-balance condition occurs. On some of the appliances, the master timer knob switch was in series with a single-pole double solenoid.