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:
Apr. 05, 1977
Filed:
Mar. 31, 1976
Applicant:
Inventors:
Guy Bourree, Paris, FR;
Claude Pontier, Velizy, FR;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B61L / ;
U.S. Cl.
CPC ...
2461 / ; 2461 / ; 2461 / ;
Abstract
Logic passing method and device enabling an automatic pilot-driving of trs in the section of track which follows the section occupied by a preceding train. The method consists in determining the rules for allowing and preventing and in implementing them by a logic passing device in which memories are set by first data and activated by second data. Applications: signals on railways or underground systems.