Hall Signal Co. v. General Ry. Signal Co.
Court of Appeals for the Second Circuit
Appeal from the Circuit Court of the United States for the Western District of New York. On appeal from an interlocutory decree entered December 28, 1908, holding valid and infringed letters patent No. 470,813, granted to Adoniram J. Wilson for an electric railway signal.
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Appeal from the Circuit Court of the United States for the Western District of New York. On appeal from an interlocutory decree entered December 28, 1908, holding valid and infringed letters patent No. 470,813, granted to Adoniram J. Wilson for an electric railway signal. The cause was before this court in April, 1907, upon an appeal from an order granting a preliminary injunction restraining the infringement of the patent in suit and four other patents granted to Wilson for similar improvements. The bill alleged the infringement of 53 claims, but the discussion on the former appeal was…
1Opinion of the Court
COXE, Circuit Judge.
This is an equity action for the infringement of letters patent No. 470,813 granted March 15, 1892, to Adoniram J. Wilson, assignor to the complainant, for an improvement in automatic electric block signals for railways. The application was filed November 9, 1891, which must be regarded as the date of the invention.
The drawings represent, diagrammatically, the invention applied to a series of seven blocks on a line of railway, the sections varying in length to meet the requirements of different railways. The intermediate blocks—those between the first and the seventh as…
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