Page:Federal Reporter, 1st Series, Volume 1.djvu/313

PAGE V. HOLMES BUEGLAR ALABM TBLiiGEAPH 00. 805 �euit-treakers, now on file in the United States patent office, including therewith his circuit-breakers described by him prior to said application, and that if the commissioner shall adjudge the said Page to have been the first inventer thereof , he shall issue to him a patent, which patent- shall be valid, notwith- standing said Page's invention may have been described or in use prior to said application, and notwithstanding the faot that said Page is now an examiner in the United States patent office: Provided, that any person in possession of said apparatus prior to the date of said patent shall possess the right to use, and vend to others to use, the said specifie apparatus in his possession, without liability to the inventor, patentee, or any other person interestod in said invention or patent, therefor." �There are 15 claims in the reissue. It is insisted that claims 11, 12 and 13 have been infringed by the defendant. They ara as follows: "11. The adjustment of the retractile force of an automatic circuit-breaker, substantially as set forth. 12. The combination of an electro-magnet, armature and adjustable retractor. -13. Adjusting or regulating the length of vibration of the armature of an electro-magnet by means of a set-screw, or any mechanical equivalent for sub- stantially the same purpose, substantially as herein set forth." �Portions only of the specification are necessary to be con- sidered. After describing the arrangement of a revolving armature for an automatio circuit-breaker, the specification says: �"Instead of a revolving armature for a circuit-breaker, a vibrating armature may be substituted, and the latter will be found more convenient for several reasons. One especially is, that it can be readily adjusted so as to increase or dimin- ish the rate of interruption of the circuit and the force to be overcome in working it. A vibrating automatic circuit- breaker, consisting of a very small electro-magnetic bar, vibrating between the arms of a permanent magnet, the magnet changing its poils at each vibration, the length of vibration �v.lno.5 — 20 ��� �