Interior Conduit & Insulation Co. v. Eureka Electric Co.

62 F. 456, 1894 U.S. App. LEXIS 2879
CourtU.S. Circuit Court for the District of Southern New York
DecidedApril 21, 1894
StatusPublished
Cited by1 cases

This text of 62 F. 456 (Interior Conduit & Insulation Co. v. Eureka Electric Co.) is published on Counsel Stack Legal Research, covering U.S. Circuit Court for the District of Southern New York primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Interior Conduit & Insulation Co. v. Eureka Electric Co., 62 F. 456, 1894 U.S. App. LEXIS 2879 (circtsdny 1894).

Opinion

COXE, District Judge.

This is an infringement action based upon letters patent ‘No. 401,498, granted to Johnson and Greenfield, April 1(>, 1889, for improvements in wiring structures for electric lighting. The object of the patentees was to provide buildings with wires for electric lighting which can be readily removed and replaced by other wires. A second object was to furnish protection from Are. There are four siieets of drawings and a description which enters minutely into details, but the improvement in controversy may be stated briefly to consist in placing a pair of wires, — each wire forming one side of an electric lighting circuit,— info a pipe made of insulating material; a safety c-ateh being interpolated in said circuit

The first and third claims afe the only ones involved. They are as follows:

“(1) In house wiring for electric light, the combination of a pipe of insulating material, a pair of wires insulated from each other and placed in close proximity to each other within said pipe, and each forming one side of an electric lighting circuit, and a safety catch interpolated in said circuit, substantially as set forth.”
‘‘(3) In house wiring for electric light, the combination of a pipe of insulating material, a pair of insulated wires twisted together within said pipe, eacli wire forming one side of an electric lighting circuit, and a safety catch interpolated in said circuit, substantially as set forth.”

The defenses are lack of novelty and invention, noninfringement, defective title and the absence of an oath from the amended specification.

The combination of the claims is limited to the following elements in house wiring for electric lights: First. A pipe of insulating material. Second. A pair of wires insulated from each other, and placed in close proximity to each other within said pipe, and each forming one side of an electric lighting circuit. Third. A safety catch interpolated within said circuit. The third claim is like the first, only it is still further limited to a pair of wires twisted together. In the specification as originally filed, the patentees claimed the invention without reference to the material of which the pipes were constructed. Indeed, metal pipes were used by them prior to the application. They also assert in the specification as filed that, instead of one tube with two wires, two tubes containing one wire each may be used without departing from the spirit of the invention. The application was rejected upon several references, the examiner holding that the applicants had merely adopted the well-known underground system for use in buildings, and that it was not new to run electrical wires through pipes under the plaster of buildings. The applicants thereafter amended, the principal change being the limitation of the claims to pipes made of insulating material. The application was again rejected on the [458]*458Martin patent No. 286,940, which shows paper tubes for conveying electric wires, the examiner observing that “the mere fact that the pipes are of insulating material is not patentable.” He also pointed out that safety catches were old. The specification was again amended, and thereafter the patent issued. The complainant’s brief concedes :

“That each of the elements of the combination claimed in claims 1 and 3 of the patent in suit was individually old. The insulating tube was old, the twin conductor was old and the safety catches were old.”

Again, the brief says:

“Tims, the patents in evidence show that the character of paper tube set forth in the complainant’s patent was not in itself new, but could be produced by any one skilled in the art.”

The question then is, did it involve invention to place the old twin wires in the old insulating tube and interpolate a safety catch in the circuit?

If there were nothing more of the prior art shown than is contained in the foregoing admissions, there might be difficulty in reaching a correct answer, but it further appears that the following devices and combinations were old:

First. Short lengths of insulating tubing were used in this art in the walls and partitions of buildings.

Second. Zinc and wooden tubing was used in the side walls of buildings with single wires. Twin wires had been run through the tubes of chandeliers, and through, zinc tubes five or six feet long-in the walls of buildings. Safety catches had been used in connection with a circuit formed by two wires drawn through the pipe of a chandelier.

Third. Complainant’s brief sums up the distinguishing merits of the alleged invention as follows:

“Such, then, being tbe admitted facts, it is apparent that me invention of Johnson and Greenfield resides in the peculiar way of utilizing the general knowledge that electric wires in close proximity tend to a short circuit, which general knowledge was availed of before by separating the conductors so as to avoid this short circuiting. Now, the peculiar way in which Johnson and Greenfield availed themselves of this general knowledge is by combining the three known elements, which were never before combined, so as to bring about the short circuiting of the wires to 'quicken the action of the safety catch.”

But it would seem that all this was clearly disclosed by Mr. Johnson himself in his patent No. 859,726, granted in March, 1887. The specification says:

“I have discovered, however, that by bringing the conductors close together, and so arranging and constructing them that any imperfection of the insulation will immediately establish an arc between tiie conductors themselves of such low resistance as to amount to a practical short circuit, the safety catches will be invariably fused and the circuit broken before damage can occur. * * * it will be seen that there can be no contact of the inner conductor with any external object except through the outer conductor. The breaking down of the insulation separating the conductors will with certainty produce an arc of such low resistance as to effect a short circuit between the conductors, -instantly fusing the safety catch or safety catches protecting the particular conductors, and breaking the circuit, or the two conductors, being in such close proximity, will be soldered together by the fusion of the lead covering, which evidently will form a short circuit between them.”

[459]*459Fourth. In .1876, Edward A. Hill obtained a patent, So. 176,784, in which occurs the following statement:

“I propose lo provide a «(Ties of tubes or pipes broken at each turning, and at intervals along tlieir lengths, by open spares, to afford access to the bundle of several wires which art» run through said tubes. These tubes or pipes are laid throughout the building, preferably supported by the lathing before the plastering is applied."

Fifth. In .1883, John F. Marlin obtained a patent, No. 275,399, the object of the invention being "to provide a noncombustible and fireproof conductor for electric light and other wires to he conveyed through buildings." This is accomplished by providing tubes of paper with an insulating lining.

Sixth. In 1884, Henry Edmunds obtained a patent, No. 291,170, in which he describes the inconvenience of passing the conductors through long lengths of pipe, and obviates this alleged difficulty by placing two insulated wires in a metallic case.

Seventh.

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62 F. 456, 1894 U.S. App. LEXIS 2879, Counsel Stack Legal Research, https://law.counselstack.com/opinion/interior-conduit-insulation-co-v-eureka-electric-co-circtsdny-1894.