The opinion of the court was delivered by: KIRKPATRICK
This suit is for infringement of United States Patent No. 2,897,347 to Kurtzon for a "Shallow Fluorescent Lamp Fixture." The defendant answered denying infringement and counterclaimed alleging invalidity, unfair competition, and violation of the antitrust laws. No evidence of the two last mentioned charges was produced, and the only issues left in the case (which has been heard by the Court without a jury) are validity and infringement.
There are two claims, infringement of both of which is charged. Claim 1 is as follows:
Claim 2 differs only in that the dropping of one or two rather unimportant features called for by claim 1 makes it a trifle broader.
The commercial embodiment manufactured by the plaintiff is a shallow, rectangular fixture adapted to be installed in a confined space (as beneath an overhead kitchen cabinet) to light up the counter space below, having a translucent shield or light diffuser which can be easily removed for changing lamps or cleaning.
All the elements recited in claim 1 are old except for immaterial variations in their precise size and shape.
The first element, a main housing plate with skirts along three sides, the fourth being provided with an inwardly turned lip along its edge, is simply a designer's choice of the form of enclosure for his fixture. A lip on some part of the housing for the purpose of engaging a flexible diffuser, thus permitting easy removal by flexing the lip inwardly, appears in several prior patents, Schepmoes No. 2,348,930 and Zingone No. 2,825,798, for example, as well as in the 208P fixture sold by Neo-Ray long before the patent application.
The second element which is essentially a flat plate enclosing the rear portion of the bottom of the housing with an attached upwardly extending partition parallel to the rear wall forms a compartment containing all of the electrical elements other than the lamp socket and lamp. A V-slot to retain the leading edge of the diffuser at the juncture of the plate enclosing the bottom and the partition is called for in claim 1. In claim 2 there is no V-slot, the leading edge of the diffuser being simply slipped over the bottom plate.
There is nothing new about partitioning off a part of the main housing of a lighting fixture to enclose other parts and so make the changing of lamps more convenient. The partitioned off wireway of claim 1, in somewhat different but equivalent form, appears in the above cited references, particularly the Neo-Ray catalog published in 1957, and also in the Garcy catalog (Ex. D-10) as item No. 7615 and the Alkco catalog (Ex. D-5) as item No. 300.
The third element, which calls for the fluorescent lamp socket elements within the main housing but outside the wireway portion, adds little or nothing to the element just referred to. It is to be found in the references cited above.
The fourth element, an L-shaped diffuser of translucent, flexible, plastic material is made so that one edge fits either into the V-slot or over the wireway plate and the other, with its outturned lip, snaps under the flange of the forward edge of the main housing plate.
Flexible diffusers are common in the art. There are a number of arcuate and box-shaped ones all of which are designed to be anchored on the housing resiliently so that they can snap in and out without effort. It is true that none of them can with strict accuracy be described as L-shaped, but the precise shape has nothing to do with their function other than its being adapted to enclose the particular fixture to which it belongs.