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:
Mar. 15, 1977
Filed:
Aug. 19, 1975
Applicant:
Inventors:
Hisakatsu Kiwaki, Katsuta, JA;
Hiroshi Okubo, Katsuta, JA;
Assignee:
Hitachi, Ltd., , JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B61L / ;
U.S. Cl.
CPC ...
246 / ;
Abstract
A signaling system for cars having wheels adapted for running along a track, in which a signal wire is disposed to extend along the track, a pantograph is provided on each car to make sliding engagement with the signal wire, and a detector apparatus responsive to the sliding movement of the pantograph along the signal wire is provided to detect the relative interval between the cars.