Western Electric Co. v. LaRue, 139 U.S. 601 (1891)
U.S. Supreme Court
Western Electric Co. v. LaRue, 139 U.S. 601 (1891)
Western Electric Company v. LaRue
No. 279
Argued April 1, 1891
Decided April 13, 1891
139 U.S. 601
APPEAL FROM THE CIRCUIT COURT OF THE UNITED
STATES FOR THE SOUTHERN DISTRICT OF NEW YORK
Syllabus
A telegraph sounder constructed under letters patent No. 352,317, granted November 9, 1886, to Charles D. Haskins, infringes the third claim of letters patent No. 270,767 for a new and useful improvement in telegraph keys, viz.,
"The combination, in a telegraph key, of the lever fulcrumed upon the torsional spring, with the adjusting screws H H', for regulating the amplitude of the lever movement and the retractile resistance of the torsion spring, substantially as described."