Goodyear v. Rust

10 F. Cas. 723, 6 Blatchf. 229
CourtU.S. Circuit Court for the District of Connecticut
DecidedNovember 7, 1808
StatusPublished
Cited by3 cases

This text of 10 F. Cas. 723 (Goodyear v. Rust) is published on Counsel Stack Legal Research, covering U.S. Circuit Court for the District of Connecticut primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Goodyear v. Rust, 10 F. Cas. 723, 6 Blatchf. 229 (circtdct 1808).

Opinion

SHIPMAN, District Judge.

The validity of this patent has been so often sustained by adjudications, that no question will be considered, in deciding the present motion, except that of infringement The bill of complaint in this case is supported by affidavits, which clearly entitle the plaintiffs to the injunction prayed for, unless the defendant’s proofs overcome or avoid their effect. The defendant works under the patent of Edward L. Simpson, and uses the compound made in accordance with the process described in that patent. The plaintiffs allege, that this process is clearly within the scope- of Goodyear’s invention, as described in his patent, and is, therefore, an infringement of their rights. This is denied by the defendant, and the question, so far as it is necessary for the determination of this motion, is now to be decided.

Avoiding all useless rehearsal of the details of this Goodyear patent, and of the repeated litigations to which it has been subjected, it may be briefly stated, that the process covered by it is secured by mixing about four otmces of sulphur and one pound of rubber, and subjecting this mixture to not less than from 260° to 275° of heat, Fahrenheit’s scale. This, under proper conditions of place and time, produces the compound or substance known as “vulcanite,” [724]*724a material now well known in the mechanic arts. The vital question involved in the present controversy, relates to the proportions of sulphur and rubber, and the degree of heat. Does the Simpson process substantially embrace these proportions and this degree of heat? If it does, then it is an infringement of the plaintiffs’ rights.

The defendant denies that the Simpson process does embrace all these proportions, as effective agents or active forces in accomplishing the work of vulcanization. In support of this denial, he has adduced affidavits of distinguished chemists, who give a delineation of the elements which “enter into Simpson’s mixture and produce his vul-canite. It will be sufficient, in this place, to refer to the affidavit of Professor Seely, as that contains all the materials of the de-fence to this motion. Professor Seely says, that the substances used by Simpson in the preparation of his hard rubber, are sulphur, gum-benzoin, oil, and common rubber, and that his manner of using these substances, as set forth in his patent, is as follows: He mixes two ounces of benzoin with sixteen ounces of sulphur, and to sixteen ounces of this mixture he adds one quart of linseed oil. This mixture, of sulphur, benzoin, and oil is then subjected to the proper degree of heat, and the result is the substance which he calls his “vulcanizing compound.” To make hard rubber, or vulcanite, he takes from ten to fourteen ounces of this compound and one pound of rubber, and thoroughly mixes them, by grinding between warm rolls. ■ He then subjects this mixture of rubber and vulcanizing compound to a heat of 320° Fahrenheit The result is a vulcanite.

Without rehearsing the details of the analysis presented by Professor Seely, it may be stated, that the quantity of this. compound which is necessary to perfectly vulcanize one pound of rubber, contains, in some form, not much less (to use the language of Goodyear’s specification) than four ounces of sulphur. In other words, this amount of sulphur goes into this quantity of the compound, and forms one of its original elements. About half of this sul-phur chemically combines with the oil, and forms what Professor Seely calls “vulcanized oil,” and the other half exists, in the mass of vulcanized oil, in the form of free sulphur. ' Vulcanized oil alone, when mixed with rubber, will not vulcanize the latter, according to the evidence before me. Professor Seely says: “The effect of vulcanized oil, on mixing and heating with rubber, is not at all chemical; The rubber does not, in any chemical sense, become vulcanized. Whatever advantage there be in the use of vulcanized oil with rubber, must be wholly due to physical and molecular causes, and cannot be accounted for on any theory of vulcanization based on Goodyear’s processes. A quantity of vulcanized oil containing four, or even sixteen, ounces of sul-phur, may be mixed and heated with one pound of rubber, and not an atom of Goodyear’s hard rubber can be produced.” He then goes on to say: “Simpson’s compound is composed of vulcanized oil and free sul-phur. When the compound is rolled and heated with rubber, the free sulphur, no doubt, acts upon the rubber with its full efficiency; and, in estimating the vulcanizing, or hardening, properties of the compound, the value of the free sulphur, if any, must be conceded. It- is, therefore, necessary to compute the amount of free sulphur in Simpson’s compound.” This computation he then proceeds to make, and the result is, as I have stated — one-half of the sulphur is combined with the oil chemically, and the other half remains free, or, as Professor Silliman expresses It, is “entangled in the mass of this compound.” Professor Seely says, of this compound: “The free or effective sul-phur is exactly one-half of the whole contents of sulphur.” What part the benzoin plays in the compound does not appear from the evidence. But I gather, from Simpson’s specification, that “its vaporizing qualities more perfectly expel the fumes of the sul-phur, as well as the odor from the oil, and render the compound nearly, if not perfectly, odorless.” In the performance of this office, it may be an improvement on Goodyear’s process.

It is conceded, then, that vulcanized oil (oil and sulphur chemically combined) will not produce, when mixed with rubber and heated, vulcanite. There is no proof that the benzoin renders the vulcanized oil any more effective as a vulcanizing agent It is equally conceded, by the defendant’s evidence, that the quantity of free sulphur in Simpson’s compound cannot alone vulcanize. It is asserted that the vulcanized oil, and the free sulphur scattered through it¡ do successfully vulcanize, whenever the mass of compound applied to one pound of rubber contains, in the whole, not much less than four ounces of sulphur in all, free and combined. Such a proportion of the mass to the pound of rubber is necessary to comply with the conditions of Simpson’s patent. We have, then, Goodyear’s invention, which consists in combining not much less than four ounces of sulphur, with one pound of rubber, and submitting' the same to not much less than 260° to 275° of heat, Fahrenheit’s scale. We-have ■ Simpson’s process, which consists in combining not much less than four ounces-of sulphur, with one pound of rubber, and' subjecting the same to a heat of 320°, Fahrenheit’s scale. The distinction which is sought to be made between these two compositions, or processes, is founded upon the claim that, in Simpson’s one-half of the sul-phur is first chemically combined with oil, forming a new substance termed vulcanized oil, and, while there, though acting in the same mass with the remaining half of the sulphur, as an auxiliary vulcanizing agent, acts in a [725]*725different way from the free sulphur itself. In other words, half the quantity of sulphur necessary to vulcanize under Goodyear’s process, has disappeared, and exists no longer, except as it is represented in a new chemical substance called vulcanized oil. The other half remains. But neither the half that remains,' nor any quantity of the new agent, can alone vulcanize. Yet the two, acting together, at once perform this important office, and produce the same result as Goodyear’s combination. .

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Bluebook (online)
10 F. Cas. 723, 6 Blatchf. 229, Counsel Stack Legal Research, https://law.counselstack.com/opinion/goodyear-v-rust-circtdct-1808.