Harvey Hubbell, Inc. v. American Brass & Copper Co.

(after stating the facts as above). Although the patent is for a socket for electrical lamps, the claims in suit relate solely to the mechanics of providing for the circuit, its making and brealdng. Let it be assumed that the device is clever, and has attained a reasonable measure of commercial success — the questions remain as always — what did the patentee really add to the sum of human know!*49edge, and how did he define in his claims the addition which he disclosed in' his specification.

Tregoning came into a crowded art; the field of invention for mechanical arrangement of circuit carrying…