192 F. 41 | 7th Cir. | 1911
delivered the opinion. The appeal is from a decree of the Circuit Court enjoining appellants from infringing Letters Patent No. 723,299, issued March 29, 1903, to Harry Parsons, for alleged improvements in anti-slipping and anti-puncturing devices for the tires of vehicles and for like purposes.
The patent is the same patent that was under consideration by the court in Excelsior Supply Company et al. v. Weed Chain Tire Grip Company et al. (No. 1730) 192 Fed. 35.
The claim of the appellants is that their device is intended to be applied snugly to the tire, with all the slack taken up, and all the side chains drawn to their proper tension. We are convinced, however, that in operation this device follows the Parsons concept and its mechanical embodiment. The circulars issued by the appellants, upon which the decree below was granted, show, among others, the Weed device — a device that, by the law of the structure as stated in Excelsior Supply Company et al. v. Weed Chain Tire Grip Company et al., is bound to operate within what constitutes the Parsons concept and its mechanical embodiment. Whether the other device shown— the one with tension springs — will, in practice, operate differently from the Parsons concept and its embodiment is a matter on which we are not convinced. Our judgment is that commercially it would
The decree of the Circuit Court is affirmed.