Gaylord W. Penney

Electrical precipitator for atmospheric dust

Electrified liquid spray dust precipitator

Device for accelerating electrons to very high velocities

Electrical dust precipitator utilizing liquid sprays

Electrically neutral air cleaning

Sealing gland for rotatable shafts

Electrical precipitator, especially for minute dust particles

Ozone control for precipitators

Means of charging dust at wire supports of electrical precipitators

Device for detecting oxygen in hydrogen