The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 20, 1990
Filed:
Jul. 09, 1987
Applicant:
Inventor:
Derek A Tidman, Silver Spring, MD (US);
Assignee:
GT-Devices, Alexandria, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F41F / ;
U.S. Cl.
CPC ...
89-8 ; 102520 ; 124-3 ; 1741251 ; 505-1 ; 505884 ;
Abstract
A rail gun projectile includes superconducting material. Current from a DC power supply flows between the rails through the superconducting material with a component at right angles to the elongated direction of the rails. The superconducting material is of a type that the current flowing through it produces a force for driving the projectile longitudinally along the rails. Metal abutting against the superconducting material shunts current from the power supply around a portion of the superconducting material having a tendency to go normal to the remainder of the superconducting material in the superconducting state.