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. 01, 1979
Filed:
Mar. 21, 1977
Applicant:
Inventor:
George R Newman, Lexington, SC (US);
Assignee:
Canron, Inc., New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01H / ;
U.S. Cl.
CPC ...
200 6142 ; 104 / ; 227-2 ;
Abstract
A hole sensing device for a spike driving machine is disclosed. The sensing device has two projecting fingers both of which ride along the surface of a tie plate as the sensing device is swept along parallel to the rails. The fingers actuate two switches one open and the other closed when the fingers are not contacting the tie plate. When the fingers are both engaging the tie plate the switch associated with the leading finger is open and the other closed. As soon as the leading finger registers with a hole it closes its associated switch completing the circuit and allowing a hole sensing signal to be sent.