(after stating the facts as above.) The combinations described contain nothing new unless it is the use of “momentum hand-wheels.” Ordinary hand-wheels in similar combinations, for analogous purposes, are old. This is abundantly shown by the record. I need *253only citetlie patents of Day, No. 204,205, Dyson, No. 78,683, Smith, No." 297,861, Edwards & Durkee, No. 275,614, and Cook, No. 326,719. The claim of novelty rests alone on the introduction of hand-wheels “adjusted [in the patentee’s language] to act as momentum or fly wheels.” This appears very distinctly, not only from the state of the art, but also from the history of the patent — the rejection and amendment of claims. In the plaintiff’s brief it is said the invention “consists in the substitution of momentum wheels for the scraper-raising levers of road machines, and in combining with them a brake which will hold the blade in its position.” In court it was conceded that without the peculiar wheels the combination was old. The question whether the introduction of these wheels into the combination is new, alone, therefore need bo considered, on this branch of the case. Webster defines “momentum” to be the “quantity of motion in a moving body; being always proportioned to the quantity of matter multiplied into its velocity,” and a flywheel, as one “that equalizes its momentum, or accumulates power for a variable or intermitting resistance.” All revolving wheels possess this quality, proportioned to their weight and velocity; and are capable of use as “momentum” wheels, — the term signifying those whose momentum is utilized in working machinery. It is only necessary that the resistance to their motion be properly adjusted to their force. This well-known law of physics has long been employed in the mechanic arts. Mr. Taft says in his specifications: “The rims of the wheels must ho sufficiently heavy to act as a balance against the weight of the blade-lifting device, so that the momentum of the wheel will assist in manipulating the machine.” This is an accurate description of “momentum wheels,” and their common use. As before stated, these wheels are old; and have long been applied to such purposes, in various devices. The plaintiff’s export, Mr. Brovoort, says:
“It has long been known that in cases where a continuous power was applied but the resistance to be overcome is unequal,1 a heavy fly or balance wheel will store some of the power expended during the easier part of the operation, and expend it during the more diflieult part of the operation; that part of the power which is not needed at one stage is utilized at the oilier, where it is needed. Tor example, where a crank is used less power is needed to drive the crank, when it is descending, aided by gravity, than when it is ascending. In such cases a heavy fly-wheel equalizes the motion by storing-some of the surplus power applied when the crank is descending and expending it to help the crank in its ascent.” /
Ho might have enumerated many similar instances of its uso. The novelty claimed, as we have seen, docs not consist of a new or peculiar wheel, but in the uso of the old “momentum wheel” in a common device, for regulating road-scrapers. Mr. Taft substituted this wheel for the smaller one previously used in such devices.
While the language of the tenth and thirteenth claims does not limit them to such wheels, the limitation must bo implied or the claims declared invalid on that account. Docs the substitution of the heavier wheel for the lighter one embrace patentable novelty? Granting that the use of such wheels for this purpose is new, it seems to be analogous to the uses previously made of them. Whether as fly-wheels, rudder-reg*254ulating wheels (as seen in Tyler’s patent) pump:operating wheels (as in Lyon’s patent) street-car brake-wheels, crank-shaft wheels, (as in Boon’s patent,) the larger spinning-wheels of 50 years ago, and all others whose momentum was utilized, they were employed to aid in working the attached machinery. It does not seem important, as the plaintiff urges, whether the momentum is sufficient to continue the work, temporarily, after the propulsive force is withdrawn. The principle applied, and the uses made of it, are the same, where it is sufficient and where it is not. The insufficiency arises only from the disproportion of the wheel to the resistance. The momentum of the capstan-wheel (itself) winds the slackened cable, Day’s rudder-wheel and Lyon’s pump-wheel continue the work, as Mr. Bates testifies, after the hand is removed; and the larger spinning-wheel (now disused) drove the spindle after the hand was withdrawn. — (While this latter wheel is not mentioned in the record, it is a matter of common knowledge, ánd may be referred to by way of illustration.) — In all instances where the momentum of wheels has been •utilized in mechanical contrivances, it has been employed to áid in their propulsion. So Mr. Taft employs it. The use is not, therefore, new. But it is clear that Mr. Taft was the first to .apply such wheels to devices for regulating road-scrapers. The old wheels employed in such devices had momentum, and differed from his only in that they were lighter. As, however, there was no standard for the size and weight of the old wheels, it is probable that in many instances even this difference did not exist. Those called for in Lyon’s patent seem to be heavier than his. The plaintiffdoes not confine himself to wheels of any particular size or weight; but construes his patent to cover all wheels whose momentum can be used in operating the device. Those of the defendant ake materially smaller and lighter than the plaintiff uses; yet they are complained of as infringing, because as Mr. Brevoort says, if “great force is applied so as to obtain a high rate of speed” their momentum can be utilized. This doubtless maybe said as truly of many of the old wheels employed in such devices. If sufficient speed is obtained they will store enough momentum to continue motion for a brief period. Thus construed it •can hardly be doubted the patent is anticipated. Granting, however, that he was first to see the importance of constructing wheels with stich relation to the weight of the scraper and attachments, as would render their momentum of essential value in its adjustment, did this embrace invention? As was said in Duster Co. v. Levy, 43 Fed. Rep. 381, what constitutes invention has been so fully and repeatedly discussed that further elaboration would be waste of time. Two-thirds probably of all suits brought to enforce patents have involved it, and more time has been employed in its consideration than has been expended on any other question of patent law.
As is said by the supreme court in Hollister v. Manufacturing Co., 113 U. S. 59, 5 Sup. Ct. Rep. 717., a device which displays only the expected skill of the maker’s calling, and involves only the exercise of ordinary faculties of reasoning upon materials supplied by special knowledge and facility of manipulation, resulting from habitual intelligent practice, is in no sense a creative work of inventive faculty, and such as the constitution and *255patent laws aim to encourage and reward. It is something, as the court further says, at page 72, 113 U. S., and page 724 , 5 Bup. Ct. Rep., “which springs from an intuitive faculty of the mind put forth in search of now results, or new methods, creating what had not before existed, or bringing to light what lay hidden from vision.” In other words it is a. new thing produced by the exercise of the creative or inventive faculty, and not by the employment simply of common reasoning applied to existing and known facts. Patents are constantly overturned for want of invention where its absence is not clearer than in this case. The later volumes of reports are Ml of such cases; eight being found in 132 U. S. It is sufficient to cito a few of them. Hollister v. Manufacturing Co., 113 U. S. 59, 5 Sup. Ct. Rep. 717; Thompson v. Boisselier, 114 U. S. 1, 5 Sup. Ct. Rep. 1042; Pennsylvania R. Co. v. Locomotive E. S. T. Co., 110 U. S. 490, 4 Sup. Ct. Rep. 220; Bussey v. Manufacturing Co., 110 U. S. 131, 4 Sup. Ct. Rep. 38; Weir v. Morden, 125 U. S. 93, 8 Sup. Ct. Rep. 869; Holland v. Shipley, 127 U. S. 396, 8 Sup. Ct. Rep. 1089; Aron v. Railway Co., .132 U. S. 84, 10 Sup. Ct. Rep. 21; Day v. Railway Co., 132 U. S. 98, 10 Sup. Ct. Rep. 11; Roemer v. Bernhelm, 132 U. S. 103, 10 Sup. Ct. Rep. 12; Watson v. Railway Co., 132 U. S. 161, 10 Sup. Ct. Rep. 45.
In this view of the law I think it must bo held that Mr. Taft’s substitution of the heavier wheel, and consequent utilization of its greater momentum, did not embrace invention. Any competent mechanic whoso attention had been called to the difficulty of operating the device with the smaller wheel (its tendency to reverse) would, I believe, have seen the importance of increasing its size and weight, and thus increasing its resisting force — would have seen that this alone ivas needed to overcome the tendency. Mr. Taft did no more. His discovery was the result of applying common reason to known facts. There does not seem to be anything like invention about it.
It is not sufficient that a patentee has seen and applied what others have overlooked and thus made valuable improvements. Results obtainable by common reason are often thus overlooked, as in the case of the revenue stamp, involved in Hollister v. Manufacturing Co., above cited. There the improvement made was of groat utility and the means of making it had been overlooked, though the importance of some such change had been felt for a long time. Yet the court held that it did not embrace invention. As is said in Pearce v. Mulford, 102 U. S. 118: “All improvement is-ilot invention, and entitled to protection as such. Thus to entitle it, it must be the product of some exercise of the inventive faculties, and it must involve something more than what is obvious to persons skilled in the art to which it relates.”
I have not overlooked the presumption to which patentees are entitled. In view however of the numerous instances in which patents are overturned, the presumption is not entitled to very great weight. In a majority of cases, whore assailed they are declared invalid. For reasons stated the bill must be dismissed.