Exhaust smog devices, 1956
Dr. Leslie A. Chambers, new APCD research director, and State Sen. Richard Richards who introduced legislation to protect public from unauthorized exhaust smog devices. They discuss the 8 devices shown yesterday -- one of which, a carburator attachment, shuts of[f] gasoline when a car decelerates -- the time when most smog-forming hydrocarbons are emitted. This device is shown on table here, and is typical of kind most inventors are turning to in race to reach market with smog device exhaust control that will work".