UNITED STATES SUPREME COURT DECISIONS ON-LINE

The claim for which Esek Bussey secured, July 18, 1876, letters patent No. 180,001, is confined to an automatic device for raising up and letting down a hinged oven shelf, and they are not infringed by constructing and operating a shelf as described in letters patent No. 205,704, granted Jan. 9, 1878, to E. C. Little and D. H. Nation. The devices in both letters, though in some respects different, operate upon a principle which has been long used in other contrivances by which the same general effect is produced.