230 F. 157 | 7th Cir. | 1915
Eleven claims are stated in the patent; but the fifth is the only one said to be infringed. It reads as follows:
“5. In a water-softening apparatus, the combination with a precipita tin?; tank, of a box supported above said tank to receive the water to be treated and provided with a relatively large opening discharging to said tank and a smaller discharge opening, a water supply pipe discharging into said box, a chemical solution holder discharging to said tank, means connected witli said holder for proportioning the discharge therefrom, a regulating box communicating with said smaller discharge opening, and a float in the regulating box operatively connected with said proportioning means, for the purpose set forth.”
In opening the specification Bruce stated his general purpose thus:
“My invention relates, particularly, to improvements in the mechanism commonly employed in industrial water-purifying apparatus, and surmounting the precipitating or settling tank, for automatically proportioning to the supply*158 of water to be treated tbe chemical used for treating it by mixture therewith in its course to the tank.”
Then follows a lengthy detailed description of the specific construction of the various features of the apparatus, with.numeral references to five sheets of drawings; but it is unnecessary to do more than epitomize from the specification a view of the apparatus and its method of operation so far as claim 5 is concerned.
At the top of the apparatus a supply pipe discharges water into a box. In the bottom of this receiving box are two openings, one much larger than the other. From the large opening the water -flows directly into the precipitating tank at the bottom of the apparatus. From the small opening the water is conducted into a tank, which is much smaller than the precipitating tank, and tvhich during the operation -of the apparatus has no outlet. This smaller tank is above the precipitating tank. For .convenience of description, Bruce in his specification gave to this smaller tank the name “regulating box.” In the regulating box is a float. To the top of the float is attached a chain. This chain leads up over pulleys and down to the chemical holder, which also is above the precipitating tank. In the side and near the bottom of the chemical holder is a spout through which the liquid chemical is discharged into the stream of water flowing from the large opening in the receiving box into the precipitating tank. To, the inner end of this spout is attached a short piece of flexible tube. To the other end of the flexible tube is attached a rigid tube. And to the open end of this rigid tube or “lift pipe,” as it is called in the specification, is attached the chain that comes over the pulleys from the float in the regulating box. As the float rises, the lift pipe’s open lip, which is at the surface of the liquid chemical, is lowered; and thus is obtained the result of “automatically proportioning to the supply of water to be treated the chemical used for treating it by mixture therewith in its course to the tank.”
Claim 5 is the most generical one in the patent; and Bruce apparently had its structure and method of operation in mind when, in closing the specification, he declared:
“It will be understood from tbe foregoing description of tbe detailed construction and operation of tbe apparatus tbat my improvement, in its broadest sense, lies in tbe employment of a float-containing regulating box to cooperate with suitable means on or in tbe solution bolder for properly proportioning to tbe outflow from tbe latter tbe flow of water into tbe regulating box to cause sucb water to raise tbe float in the same ratio and produce tbe same amount of solution discharge as tbe predetermined amount of water tbat flows into tbe regulating box.” ' ■
Many ways of attaining the general result of softening hard water are shown to have been old. Two are relied on to defeat claim 5.
One is exhibited in patents to Greth, No. 749,728, January 19, 1904, and to Gaillet, No. 563,660, July 7, 1896.
Taking from them the structure most nearly corresponding to claim 5, we find': A supply pipe; a receiving box with a large and a small opening in the bottom; a precipitating tank into which water flows directly from the large opening; a chemical holder; and a small tank with no outlet, which is poised over the chemical holder by means
In the above Greth-Gaillet combination the movable blind tank serves two purposes: It serves, equally with a stationary blind tank, to hold the water that flows from the small opening in the receiving box; and, by reason of its descending movement due to the inflow of the water, it also serves as a displacer to cause the liquid chemical to overflow into the precipitating tank. In claim 5 the stationary blind tank performs ónly the first above named function; the second is accomplished through the progressively rising float’s being operatively connected with other means for proportioning the discharge from the chemical holder. If the Greth-Gaillet combination were later than the patent in suit, it would not infringe. For a five-element structure is not within a six-element claim. And therefore the Greth-Gaillet structure is not an anticipation of claim 5.
Two Kennicott patents, No. 655,606, January 8, 1901, and No. 708,-717, September 9, 1902, and an apparatus described in a German publication by Wehrenfennig are the bases of the other alleged anticipation.
Kennicott shows: A supply pipe; a receiving box having in the bottom but one outlet, and that of such a size that the water maintains a constant level in the receiving box so long as there is a constant flow from the supply pipe; a precipitating tank into which flows all the water from the receiving box; a large chemical holder that discharges through a pipe in its bottom into a small chemical holder, in which a constant level is maintained by means of a float-controlled valve in the inlet pipe, and from which the chemical flows into the precipitating tank through a flexible tube, which is always submerged in the chemical, and to the inner end of which is attached a rope that goes up over pulleys and down to a float in the receiving box. If the influx from the supply pipe is constant, the float in the receiving box performs no office; and this should be the normal operation. If, however, the influx should increase, the rising float in the receiving box lowers the open end of the submerged flexible tube, and the increased head causes an increased outflow of chemical proportionate to the increased flow of water; and if the influx should decrease, the operation is reversed. Thus the effects of undesired fluctuations from the desired and intended constant level of water in the receiving box are counteracted. Kennicott’s constant level receiving box is not the equivalent of Bruce’s blind tank. Kennicott’s corrective float is not the equivalent of Bruce’s progressively rising float. The two types are utterly dissimilar in structure and in principle of operation. They have nothing in common but their separate lines of descent from a remotely common ancestor.
Wehrenfennig’s device belongs to the Kennicott rate-of-flow type. It is identical in principle. Except for stress laid upon a useless de
By removing the Greth-Gaillet blind tank from the chemical holder, making it a stationary member of the apparatus, and depriving it of its function as a displacer, Bruce obtained desirable results. If an emulsion or milk of lime is used as the precipitating agent (and with some hard waters it is the most efficient), settlement of the lime upon the blind tank would to some extent upset its accuracy as a measurer of the chemical discharge, and the blind tank itself is an obstruction to the most feasible way of introducing a mechanical stirrer into the chemical holder. Both of these objections are absent from the Bruce apparatus.
Appellee insists, however, that the proofs with respect to the use of milk of lime cannot properly be noticed, first, because “solution” is the only word appearing in the patent in connection with lime and other recommended chemicals, and second, because a stirrer is not included as an element in claim 5.
Second. If only saturated solutions be used, a stirrer is not needed; and the apparatus of claim 5, complete within itself, is efficient to put a measured amount of the liquid chemical into the hard water. If solutions that are supersaturated and that cease therefore to be technical solutions be used, a stirrer may be helpful and even necessary; but the apparatus of claim 5, complete within itself, is efficient to put a measured amount of the liquid chemical into the hard water. A stirrer, whether mechanical or human, has only to do with the quality of the chemical discharged into the hard water, has nothing to do with the quantity. It (or he) is a separate auxiliary means, needful or needless for a different purpose as the case may be, while the apparatus of claim 5, self-contained, always stands ready to perform its independent office of measuring out any sort of liquid chemical discharge.
Though neither the Greth-Gaillet nor the Kennicott-Wehrenfennig type of water-softener is an anticipation, appellee contends that in view thereof no invention was exercised in producing the Bruce apparatus of claim 5. Water-softening was quite an old art. All apparatus were necessarily akin in that they proportioned the chemical to the hard water. Several distinct types had been developed and improved from time to time. But Bruce, we believe, brought forth a new genus in the family of water-softeners. In general the elements were old. Appellant concedes this except as to the blind tank with its float, the “float containing regulating box” of the patent’s terminology. Respecting this feature the contention of appellant is that Bruce invented the water-measuring blind tank with its progressively rising float as a new instrumentality for causing the necessary movement of the chemical discharging means. He failed, however, to claim this element as an independent mechanical movement. It must therefore stand as a known, or at least an open, means of furnishing power. But, even so, Bruce •was the first to bring it into a water-softening apparatus and there combine it with the necessary elements that were common to the art. This does not seem to have been an obvious thing to do. The record disposes us to doubt that appellee’s modifications of the prior devices in order to show how easy it was for Bruce to go forward, were suggested by the old devices themselves or came from the knowledge and skill of the prior art. The record inclines us to believe that they originated in a study and an appreciation of the Bruce patent. For when we consider the capabilities and advantages of the new combination, Bruce’s long connection with the practical art, his endeavors to build an apparatus that would handle clear solutions and also milk of lime as efficiently as this final apparatus does, and his failure in earlier attempts, we are driven from doubting that he should be classed as an
Appellee’s apparatus follows Bruce’s claim 5 at all points except with respect to the means for getting the chemical out of the chemical holder into the precipitating tank. In the Bruce apparatus, as hereinbefore we have seen, the progressively rising float in the water-measuring blind tank proportionately lowers the lip of, the chemical discharger. If, instead of a lowering lip, a stationary lip in the rim of the chemical holder were made, and if the progessively rising float in the blind tank should cause a plunger to be lowered into the chemical so that a proportionate amount thereof should- flow over the stationary lip, we would not hesitate to find infringement. For the Greth-Gaillet type proves that the stationary lip and the moving displacer were old and well known means for discharging the chemical; and the claim, relying in this respect on the general dictionary, employs the general term “means.” Now appellee’s discharging means are also of the displacer type. But, in lieu of a displacer of fixed dimensions, appellee utilizes a varying quantity of water. A conical valve, located over the chemical holder, is caused by the progressively rising float in the blind tank to open and discharge a continuously increasing quantity of water into the chemical holder, and this produces an overflow from the stationary lip in the rim. As this water displacer necessarily thins the formulated chemical solution, it is evident that a continuously increasing quantity of the holder’s contents must be made to overflow in order that ,the same amount of chemical for a given quantity of hard water shall be discharged into the precipitating tank. In the use of this improvement of chemical discharging means appellee is protected by the Bartlett patents, Nos. 1,017,728 and 1,017,729, February 20, 1912. Is infringement avoided?
What gives character and distinction to Bruce’s claim 5 is the stationary water-measuring blind tank with- its progressively rising float, operatively connected to any chemical proportioning and discharging means. In other claims emphasis is put upon various specific features, among them the “lift pipe” as the specific means of proportioning the chemical discharge. Claim 5 is plainly intended to secure the new specific “float-containing regulating box” in combination with any old or any new chemical discharging means and any old or any new forms of the necessary pipes and tanks. And appellee has seized upon the
Nevertheless appellee strives to escape through certain phraseology of the claim and specification.
“Means connected with said holder for proportioning the discharge therefrom” is the claim’s definition of the chemical discharging element ; and the word “connected” affords the alleged loophole.
Appellee’s stationary lip, like Greth-Gaillet’s, is a part of the discharging means, and it is immovably connected with the chemical holder. Of course neither appellee’s water displacer nor Greth-Gaillet’s metallic displacer nor appellant’s lift pipe that is flexibly attached to the discharge spout can immovably be connected with the holder. In this art a holder implies a contained chemical. It is only by operating immediately upon the chemical that any of said discharging means is effective. Manifestly the chemical must be held by the holder in position to be operated upon. And so the discharging means in connection with the holder effect the discharge. In that sense, the only working sense, the discharging means are connected, and they are in fact medi-ately through the contained chemical operatively connected, with the chemical holder.
When Bruce was describing his invention in its broadest aspect, in a part of the specification hereinbefore quoted, he stated that the inflow of water into his “float-containing regulating box” produced “the same amount of solution discharge”; and the last quoted words, with the emphasis on “same” and also on “solution,” are said to offer another av enue of escape.
But the measure of the patentee’s protection is the claim, not the specification. Booking to the chemical in its original dry form, we find, that both Bruce’s and appellee’s apparatus put a predetermined amount into the hard water, say one pound to a thousand gallons. When the chemical is considered in the form of a solution or a milk, we find that the same result is accomplished through the same use, in each apparatus, of the blind tank with its progressively rising float to proportion and effectuate the chemical discharge. So both apparatus clearly respond to all the elements of the claim,' including “means for proportioning the discharge” from the chemical holder.
Even if the words picked as aforesaid from the specification should be taken to limit the generic claim (which, however, is impermissible), the attempted deliverance fails. If the chemist at a manufacturing plant should prepare a certain amount of a certain solution, the apparatus of Bruce’s claim 5 would discharge the same amount of the prepared solution fo»- each thousand gallons of hard water. So would appellee’s. In both, the means for proportioning and effecting the chemical discharge are operated by precisely the same mechanism to obtain precisely the same old general result together with precisely the same new advantages that Bruce contributed to the art. And the fact that appellee’s water displacer as a discharging means mingles with
The decree is reversed, with direction to grant the prayers of the bill.