New Haven RR Automatic Train Control

Ok here's another odd-ball item. This is a Automatic Train Control whistle from the New Haven Railroad made by the General Railway Signal co. It came out of a NH electric locomotive and the air operated whistle would sound if the engineer did not acknowledge a signal or took his foot off of the "dead man" pedal. Once the whistle sounded the engineer had to immediately respond to the alarm or this control would apply the brakes and shut the throttle down stopping the train.