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:
May. 25, 1976
Filed:
Jan. 29, 1975
Applicant:
Inventors:
David H Woods, Pittsburgh, PA (US);
Lawrence W Anderson, Sao Paulo, BR;
Assignee:
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B61L / ;
U.S. Cl.
CPC ...
246 / ; 340 / ;
Abstract
There is disclosed a train vehicle protection apparatus including the determination of train vehicle occupancy of a track circuit signal block, wherein a frequency tone speed code signal is provided to the signal block for controlling the train vehicle speed and a vital and fail-safe determination of train vehicle occupancy of the signal block is provided.
Woods, David. (1976). Train vehicle protection apparatus including signal block occupancy (U.S. Patent No. 3958781). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3958781
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile