For Sale is a Milton Driveway Service Station Signal Bell and Hose. Bell is NEW With 20 feet of hose. Bell will work with up tp 300 feet of hose. Bell does not require any additional air source.
The bell must be mounted on a vertical surface and plugged in to a 110v outlet. With the hose attached you just drive over the hose or jump on it and the pressure change in the hose triggers the bell. It will ring with a light puff of air.
I also supply a plug for the other end of hose. When a car drives over an attached hose, the bell rings. Date is May 12, 1959.