Nikola Tesla U.S. Patent 1,061,142 - Fluid Propulsion Patent Wrapper Page 61

T 1 T J 1 T T T 1 J pheral ports and the device becomes a pump. It is, however, a self evident fact that without change. in the character of the ports the device, whatever may be its possibilities; is not an economical or practicable form of apparatus for both purposes, for an engine port of inlet is not adapted as a pump port of outlet, and conversely. The fact that the underlying principle might be applied to a pump was, however, just as much of a discovery as that it might be utilized in an engine, and under ordinary circumstances the applicant would be entitled to a generic claim to cover both, and specific claims to cover each form, and, but for the provision of the statutes which require an application to be limited to a single invention, all three claims could be made in the same case. The applicant has, however, elected to cover his inventions by two sets of specific claims, those of one set for a turbine in which the inlet ports are at the periphery, and those of the other for a pump in which the inlet port is at the center of the casing, and he has made no claim generic to both devices. For this purpose he has filed two applications which are now copending. In fact he was required to do this by the Examiner in charge of the present application on the ground, and very properly, that the two devices constituted two subject matters of invention. The claims for the turbine have all been allowed, but they do not describe nor apply to a pump, for they specifically provide that the ports of inlet shall be located at the periphery, and the pump is specifically disclaimed. How then is the applicant to secure that protection to which under the statutes, he is entitled? -2861