Fisher Governor Co. v. C. F. Camp Co.

MeDERMOTT, Circuit Court.

The appellant, plaintiff below, is the holder of letters patent No-. 1,600,162, covering an improvement in a mounting for a float arm, the particular virtue of the invention being the use of ball bearings at twoi points where friction was interfering with the sensitive operation of the float. The defenses were, of course, the invalidity of the patent, and noninfringement. The trial court dismissed the bill. Error is assigned particularly as to claim 3.

For several years the oil industry has used a “separator tank,” the purpose of which is to separate oil from natural…