Legal Opinion
Thomson-Houston Electric Co. v. Lorain Steel Co.
U.S. Circuit Court for the District of Southern New York
Decided July 11, 1900PublishedCited by 2 opinions
In Equity. Suit for infringement of a patent. On final hearing.
1Opinion of the Court
SHIPMAN, Circuit Judge.
This bill in ment by the defendant of claims 1, 2, 8, and 4 of letters patent No. 428,109, dated May 20, 1890, issued to Walter H. Knight for an improved electric motor regulator. The patent has been owned by the complainant since November 7, 1891. The invention was adapted to electric railway motors working on a circuit of “constant potential,” and was designed to prevent the sudden overloading of the motor. The patentee says in his specification:
“In motors on a circuit of this character, it is essential that a resistance or other device for opposing the electro-motive…
2Cases cited2 opinions
- Boyden Power-Brake Co. v. Westinghouse Westinghouse v. Boyden Power-Brake Co.Supreme Court of the United States · 1898
- Morley Sewing MacHine Co. v. LancasterSupreme Court of the United States · 1889
3Cited by2 opinions
- Hildreth v. MastorasDistrict Court, D. Oregon · 1918
- Thomson-Houston Electric Co. v. Garrett Coal Co.U.S. Circuit Court for the District of Western Pennsylvania · 1906