Court Opinion

ID: 8126527
Source: CourtListenerOpinion
Date Created: 2022-09-09 15:07:10.168283+00
Date Added: 2024-06-11T16:39:15.075187
License: Public Domain

Wallace, J.
The second claim of letters patent1 granted to John J. Cowell, April 23, 1872, for an “improvement in sash balances,” is in controversy in this suit. The invention in question relates to a cast metal pulley-box, and consists in forming the box with two or more *337semi-tubular swellings, one at each end of the box, adapted to fit auger-holes bored in the frame for inserting the box. The specification points out the advantages of such a pulley-box as follows:
“In inserting this casing in the window frame it is only necessary to bore auger-lioles corresponding with the swellings, and chip out between the holes. The swellings fit snugly in the anger-holes, and it is not necessary to cut away wood neatly between the two auger-holes, as the sides of the box are less in diameter than the diameter of the swellings. The boxes can, by reason this construction, be more easily and cheaply inserted in windpw frames, and will be held just as securely and snugly in place as if the sides were more neatly fitted to the wood. ”
The defendant is manufacturing pulley-boxes made conformably to a patent1 granted to John Vetterlein, December 12, 1876. That patent describes the alleged infringing device as follows:
“My improvement relates to the ease, 11, made with an external surface composed of segments of cylinders, 0, at opposite sides, so placed that they are adapted to enter mortises formed by holes bored in wood, such holes intersecting so that the interior of the opening made in the wood will be corrugations corresponding with the corrugations upon the surface of the case.”
In other words, the defendant’s device is provided with semi-tubular swellings, not only at each end, like that of Cowell’s pulley-box, but with the intermediate somi-tubulrr swellings which practically connect with each other. When Cowell made his improvements in pulley-boxes it was customary to insert pulley-boxes in the frame by making an auger-hole at each end of the proposed recess, and cutting away the intermediate wood; and a patent2 had been granted to Simon Drum, of the date of May 21, 1867, which described this method of inserting pulley-boxes, and described an oblong pulley-box with rounded ends, the arch of which would correspond with the arch of the auger-holes. The pulley-box of this patent did not, however, have the semi-tubular swellings of Cowell’s device. This was the nearest approach in the prior state of the art to the pulley-box of Cowell; and Cowell was the first to recognize the advantage in the saving of time and attention to details in inserting pulley-boxes which would result from employing the peculiar form of pullev-box which his patent describes and claims. Cowell’s improvement was a very simple one, and it is easy to assert now that any competent mechanic in that department of industry could have made it by the exercise of ordinary mechanical skill. Indeed, it seems surprising now that no one had made it; but no one had, although many kinds of pulley-boxes had been made, and some had been patented; and as soon as this one was made and introduced its advantages were manifest, and it commended itself to the" public as a practical and desirable device, and a better one than those which had preceded it. These circumstances afford a safe)- criterion of inventive novelty than any subsequent opinion of an expert or intuition of a judge.
The defendant has appropriated the invention of the Cowell patent, and a decree is therefore ordered for an injunction and an accounting.

 No. 126,031.

 No. 185,369.

 No. 64,957.