Lyman v. Maypole

This is a bill to enjoin an alleged infringement by the defendants of a patent issued to the complainant for an “improve*736ment in traps for exhaust steam pipes.” The object and scope of the invention is set out by the patentee as follows:

“The object I have in view is to provide the top of the exhaust pipe of a non-condensing steam-engine with a head which will not only trap off the water of condensation carried up the pipe with the exhaust steam, but also the grease used for lubricating the cylinder, and carried up by the exhaust steam. The invention consists in the peculiar construction of the…