Central Lighting Co. v. Northern Light Co.

Citations

• 137 F. 423
• 1905 U.S. App. LEXIS 5228

Syllabus

<p>Patents—Infringement—Gas Burners.</p> <p>The Denayrouze patent, No. 673,705, for an improvement In Bunsen burners for incandescent gas lights, which consists substantially in surmounting the tube of such burner with a mixing-chamber having a height approximately equal to the height that would be assumed by the dark inner core of a flame issuing from said tube, and expanding to a diameter equal to the greatest diameter of such flame, and closing the top of the chamber with a gauze screen, an ordinary mantle being placed above the chamber, must be limited to a structure having a chamber of a conoid shape, as described in the original specification and in prior foreign patents embodying the invention in which the shape is explicitly claimed, and is not infringed by the use of a cylindrical chamber; nor are the claims which include as an element a chimney substantially inclosed at its bottom to prevent a material direct access of air infringed by a burner having a chimney mounted on a gallery perforated with a large number of holes for the admission of air.</p>