U.S. Circuit Court for the District of Rhode Island April 9, 1884 (Gould v. Spicers)

Colt, J.

This is a bill in equity brought for the alleged infringement of reissued letters patent, No. 9,956, granted to David R. Gould, December 6, 1881, for an improvement in grates. The invention relates- to agitating the coal-bed of a furnace by lifting the grate-bars and letting them fall suddenly by means of two shaft's provided with cams arranged under and near the ends of the grate-bars.