75 F. 595 | U.S. Circuit Court for the District of Vermont | 1896
This suit is brought for alleged infringement, in the same machines, of reissued patent No. 11,311, the original of which was No. 442,461, for a centrifugal separator, granted to the two plaintiffs, and original patent No. 458,194, for a centrifugal milk-testing apparatus, granted to one of the plaintiffs, of whom the other is an exclusive oral licensee. Question is made about the right to maintain this suit under these circumstances. An oral license, as such, seems to be valid. Walk. Pat. § BOB. And, however that may be, the entire right to both patents is in the plaintiffs, between them, without any outstanding interest to mender the defendant in any other suit. This seems to he sufficient.
Both patents relate to machines which separate compound fluids by change of temperature and whirling. The specification of No. 11,311 says:
*596 “The centrifugal vessel is suspended in a casing, and is operated directly by the motive power; a driving spindle being dispensed with and the balancing of the vessel only being required. The motive power is applied at the outer wall of the vessel, and is preferably a heated jet or jets (as of steam), which, while driving the vessel, at the same time, by contact with said outer wall, imparts to the heavier constituent of the compound liquid (as milk) undergoing separation an increased heat, which materially assists in hastening the complete separation of the lighter constituent (cream) without materially heating the latter.”
“Our machine may be operated directly by the action of any escaping jet, but we prefer to use generally either steam, or some heavier fluid projected thereby — First, because the great speed at which vessels of this character are rotated necessitates the use of a jet of high velocity; and, secondly, because of the effect which the heat thus applied has in accelerating and completing the separation of the cream from the milk.”
“The method of suspending and operating the separator vessel directly, as described, has the very great advantage of necessitating but one balancing, whereas, when a driving spindle is used, whether operated by a steam jet or otherwise, not only must both the spindle, with its attachments, and the vessel, be placed and kept in balance, but bearings must be used, which are a great source of trouble. The extremely high speed at which these vessels revolve makes the perfect balancing of them a' necessity, and the accomplishment of this is greatly simplified by employing but one revolving body, and but one step, as in our construction.”
The claims of this patent here involved are:
“(1) The improvement in the process of creaming milk hy centrifugal force, which consists in simultaneously changing the temperature of the rotating compound liquid to facilitate the separation of the constituent parts, substantially as set forth.”
“(4) In a centrifugal machine, a separator vessel, suspended upon a flxed bearing, located substantially in the perpendicular losing through the center of gravity of the loaded vessel, in combination with means for applying rotating power directly to said vessel, substantially as set forth.
“(5) In a centrifugal machine,, a votary separator vessel, pivotally suspended substantially as described, in combination with a nozzle or nozzles located at the periphery of the vessel, and adapted to apply a jet, as. of steam, thereto, whereby said vessel is directly rotated, arid the jet utilized to affect the, temperature of tlie rotating liquid, substantially as and for the purpose set forth.”
“Fig. 1 is a sectional elevation of the complete apparatus, — one side showing the position of the testing vessels during rotation; the other, while at rest.”
“Secured to the plate by means of ears and holts is an annular casing, open towards the center, and provided with vanes or buckets projecting from its peripheral wall.”
“notation is effected directly by the action of a steam jet from a nozzle located in close proximity to the wings of the casing, on which the jet impinges. After five minutes (more or less) of rapid rotation, the separation of the fat will he complete; the, contents of the vessel being maintained during this time at a high temperature by the same steam which effects the rotation, and which enters the casing, F, and keeps the vessels in an atmosphere of exhaust steam.”
The claim now involved is:
“(3) In a milk-testing apparatus, the combination, with a rotary frame haying independently hinged pockets to receive tlie testing vessels, of an annular casing, F, fixed to said frame outside of said pockets, and a steam nozzle located in close proximity to the exterior of said casing, the space surrounding said pockets being in communication with the outside of said casing, whereby the contents of the vessel are 1 tea ted by the operating steam, substantially as set forth.”
Thu reissue is said to have been unwarrantable, as an expansion of the original, and void. The fourth and fifth, claims, however, seem to stand subs!antially as in tbe original, and to be valid. The defendant's machine is made according to subsequent patent No. 484,685, in the granting of which claims were rejected in avoidance of the plaintiffs’ patents. It is a milk-testing apparatus, and has an outer stationary casing, covering the whole whirling apparatus, suspended upon a fixed bearing in the perpendicular of the center of gravity of the load, through which a nozzle takes a jet of steam against buckets on the periphery of the rotary apparatus, whirling thereby vessels, as the upright part of the casing, F, of the plaintiffs’ patent, No. 458,194, does, and the vessels are heated by the operating- steam. The principal difference appears'to be ihat the defendant’s casing is stationary, covers the whole .whirling apparatus, and re
