Home/U.S. Circuit Court for the District of Western Pennsylvania/Elliptical Carbon Co. v. Solar Carbon & Manufacturing Co.

Elliptical Carbon Co. v. Solar Carbon & Manufacturing Co.

96 F. 413, 1899 U.S. App. LEXIS 3253
CourtU.S. Circuit Court for the District of Western Pennsylvania
DecidedMay 13, 1899
StatusPublished

This text of 96 F. 413 (Elliptical Carbon Co. v. Solar Carbon & Manufacturing Co.) is published on Counsel Stack Legal Research, covering U.S. Circuit Court for the District of Western Pennsylvania primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Elliptical Carbon Co. v. Solar Carbon & Manufacturing Co., 96 F. 413, 1899 U.S. App. LEXIS 3253 (circtwdpa 1899).

Opinion

ACHESON, Circuit Judge.

This suit is for the infringement of letters patent No. 540,800, dated June 11, 1895, granted to Samuel P. Parmly, upon an application filed October 26, 1891.

“The invention,” the patent recites, “relates to are lights, and has for its object to provide a double-service or long-burning arc lamp which shall contain hut a single pair of electrodes, and shall possess certain advantages with reference to the establishment and maintenance of the arc and with regard to preventing shadows in the light, as hereinafter set out.”

The specification, after referring to the attached drawings, states:

“The groups here illustrated are each of them in the general form of an ellipse in cross-section, or a plate having such a cross-section as would constitute a form having a width substantially one-half its length. The cross-sectional area of these groups is also substantially equal to twice the cross-sectional area of an ordinary round carbon having a diameter equal to the width of the cross-section of my proposed carbon.”

[414]*414The specification further states:

“The preferred form of carbon is substantially that shown in Figs. 1, 2, and 6; or, in other words, a carbon substantially elliptical in cross-section, and haying a cross-section whose width is substantially one-half of its length, with rounded or flattened ends. The central transverse diameter may be extended or shortened; as, for example, in the two forms shown in Figs. 2 and 6.

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Bluebook (online)
96 F. 413, 1899 U.S. App. LEXIS 3253, Counsel Stack Legal Research, https://law.counselstack.com/opinion/elliptical-carbon-co-v-solar-carbon-manufacturing-co-circtwdpa-1899.