Boyce v. Stewart-Warner Speedometer Corp.

220 F. 118, 136 C.C.A. 72, 1914 U.S. App. LEXIS 2165
CourtCourt of Appeals for the Second Circuit
DecidedDecember 15, 1914
DocketNo. 119
StatusPublished
Cited by33 cases

This text of 220 F. 118 (Boyce v. Stewart-Warner Speedometer Corp.) is published on Counsel Stack Legal Research, covering Court of Appeals for the Second Circuit primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Boyce v. Stewart-Warner Speedometer Corp., 220 F. 118, 136 C.C.A. 72, 1914 U.S. App. LEXIS 2165 (2d Cir. 1914).

Opinion

ROGERS, Circuit Judge

(after stating the facts as above). The complainants have sought and obtained a preliminary injunction restraining defendant from the threatened infringement of their patent, and the question is whether the preliminary injunction should have been granted upon the facts as disclosed by the affidavits, or whether relief should have been withheld until a hearing upon the merits.

The patent in suit is for an invention known in the trade as a mo-tometer, and it relates to a system for indicating the condition of internal combustion engines, and particularly engines with water-jacketed cylinders. It is an invention particularly applicable to automobile engines of internal combustion type. The object of it is well set forth in the specification of the patent which is as follows:

“This invention relates to a system for indicating the condition of internal combustion engines of various types, and particularly of those styles wherein the cylinders are cooled by a fluid medium which is circulated there-around or thereabout, the indicating means being located without or not in direct contact with the cylinders.
“While my invention is generally applicable to stationary and other explosive engines of any character and under varying conditions of service, it is especially adaptable for use in connection with automobiles and the like, wherein the engine cylinders are cooled by a liquid delivered or supplied thereto through any suitable medium, as, for instance, from a radiator or the like, which is customarily situated some distance away from the engine cylinders, though I would have it expressly understood that I in no wise limit myself to this specific application or embodiment of my invention, which I have selected as a basis for illustrating and describing my invention, merely for the purpose of rendering a clear and comprehensive understanding of the scope and novel features thereof.
“My invention broadly comprehends the provision or arrangement of means for indicating the condition or temperature of the engine, the action of the temperature indicating means being governed or controlled by the water or other circulating medium employed for producing such variations in the temperature of the cylinders as may be necessary or desired by the operator.
“I have found that many, if not most, of the troubles to which internal combustion engines are subject, result directly or indirectly in a change in the temperature of the engine and cooling system, this being true, for instance, of such contingencies as imperfect lubrication, improper adjustment of the carburetor, insufficient water in the radiator, failure of proper circulation of the cooling water, broken fan belt, etc., and it is the object of the present invention to provide an effective indicator governed by such changes of temperature which will call to the attention of the operator the existence of conditions inimical to the satisfactory operation of the engine, arising from any of these or similar causes.”

The complainant’s device embodies the idea primarily of affording protection against the great evil of engine overheating, for which previously there had existed no remedy. It also provides an indication to the operator of the thermal condition of his engine. Both of these results are accomplished by the use of a temperature responsive device [120]*120located in the air space at the top of the radiator of the engine cooling system. Through this instrument a continuous temperature indication is given for the guidance of the operator. This indication is not of exact water temperatures, but shows changes in thermal condition. When the point of danger is reached and steam is formed in the radiator, the instrument affords an unmistakable trouble signal. This is due to the peculiar organization of the apparatus whereby the temperature responsive element or thermometer normally indicates a lower, but substantially proportional, temperature- with relation to the water temperature, which jumps to the actual temperature upon the occurrence' of dangerous conditions.

The device which defendant proposes to put on the market, and which is called the Stewart radiator meter, is an instrument of exaetty the same character as the Boyce motomet'er. The circular which defendant has put out shows conclusively that it is designed for exactly the same purpose, and that.it does exactly the same work in exactly the same way. Like the Boyce motometer, it is designed to be attached to the radiator cap of an automobile, and it has an indicator which provides temperature readings visible from the driver’s seat. The indicator is- governed by a temperature responsive element which differs from that in plaintiff’s device in length by about one-half an inch, which projects downwardly through the radiator cap exactly as does the Boyce device. In the latter device the temperature responsive dement-is located in the air space above the water, while in defendant’s it extends into the water. But it appears from defendant’s own circular that it, like the complainant’s device, “is affected by the temperature of the air over the water.” And as an automobile cannot run more than a few miles before a certain proportion of the water in the radiator is-dissipated and lost by evaporation, expansion, and overflow, and that ordinarily the radiator does not begin to heat until the machine'has run 10 miles, it is perfectly clear to us that the thermostat bar or temperature responsive element in defendant’s device constitutes a palpable and obvious infringement, and one that would be enjoined upon the merits,1 if at final hearing the complainant’s patent was found valid.

It appears that gasoline engines such as are now universally used in automobiles differ from other types of power units in that the power is-produced in the cylinder by the explosion of a gaseous mixture. This explosion generates so much heat that unless provision, in addition to' lubrication, is made for cooling the engine parts, they would be destroyed. All automobile engine cylinders are now provided with a water jacket, through which cool water is forced to circulate by means-of pumps, syphon, and other arrangements. And a well-designed engine, if properly lubricated, operates efficiently so long as its cooling-system works satisfactorily. But any derangement of the system means-. overheating, whether it be from low water, a broken or clogged water pump, a broken fan belt, or faulty lubrication. In order to secure the highest efficiency of operation and regular and flexible action in an automobile engine, it is essential that the cooling be not carried to an excess.'. In a cold engine the charge is not exploded with regularity in the cylinders and fuel is wasted. Engines cannot be safely operated at a temperature which raises the cooling water in the cylinder [121]*121jackets above boiling, as such a temperature causes the water to boil away and fail to perform its cooling function. The closer the temperature is kept to the boiling point, the more efficient is the operation of the engine. In standard makes of automobiles the temperature of the water in the cooling system will be from 190 degrees to 202 degrees F. when representing safe conditions, while 212 degrees F., or boiling, indicates danger. The mere attaining a dangerous degree of heat in the engine is not necessarily fatal. But the damage is done by continued operation of the engine at the dangerous temperature.

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Bluebook (online)
220 F. 118, 136 C.C.A. 72, 1914 U.S. App. LEXIS 2165, Counsel Stack Legal Research, https://law.counselstack.com/opinion/boyce-v-stewart-warner-speedometer-corp-ca2-1914.