Page:Federal Reporter, 1st Series, Volume 1.djvu/318

 310 fbdbbàIj BBFonïaB. �that said invention is now in public and common use, and eitensively made and sold, and that he has never consented to such sale or use, nor abandoned such invention to the public." �Accompanying said application was a letter from Dr. Page to the commissioner of patents, dated January 27, 1854, in which he said: "Being about to apply for letters patent for the invention set forth in the accompanying affidavit, I beg leave to request that you vrill authorize the examination of my claims wifchout delay, in view of the f acts in the case, but more especially for the reasons that the invention has been so long in public use without my consent or power to restrain it, and that I have hitherto made application for letters patent for this invention to congress, the only source from which, under the law, I could expect to get a patent." �The drawings accompanying said application do not seem to have been preserved on file, though the record shows that there were two drawings. The specification on the applica- tion, as originally filed, said : "Fig. 1 is a perspective view of the machine. Pig. 2 is a bottom view of the base board of the machine, showing the wire connections. Figs. 3, 4, 5, 6, are views of varions forms of compound electro-magnets. Figs. 7, 8, exhibit different forms of interrupters or electro- tomes. My invention consista, first, in combining with a helix or helices, enclosing a compound and adjustable electro- magnetic core, a self-acting electro-magnetic electrotome, so that, when said helix or helices are conneeted with a galvanic battery, the galvanic circuit shall be instantly broken and re-established, and thus continuously andrapidly interrupted and completed, without the aid of the operator, or mechanical movements, whereby a rapid succession of shocks may be obtained and graduated in a convenient manner for medical purposes. Prior to my invention mechanical interrupters or electrotomes were employed to produce shocks from helices,, enclosing electro-magnets, and required the services of an attendant, and the size, expense and difficulty of working such machines prevented their use to any considerable ex- tent; but the employment of the self-aoting electrotome in ��� �