U.S. Circuit Court for the District of District of Columbia August 20, 1860 (Ex parte Dietz)

MORSELL, Circuit Judge.

In his specification, Dietz says: “Having thus described my invention, what I claim as new in flat wick lamps, and desire to secure by letters patent is, an air-chamber in combination with the chamber formed by the concavity-of the deflector of a lamp top, substantially as described.