Consolidated Engine Stop Co. v. Landers

NOYES, Circuit Judge.

This is a suit alleging the infringement of patent No. 509,334, granted November 21, 1893, to John E. Stan-nard, for improvements in throttle valves. The defenses are nonin-fringement and the invalidity of the patent. The former defense will be first considered. If there be no infringement, consideration of the other questions is unnecessary.

The patented device is a throttle valve to shut off the steam passing to an engine, and may be operated by means of an electrical connection from any point in a factory. It is an emergency valve, and is designed to be used whenever,…