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. 26, 1996
Filed:
Aug. 19, 1994
Applicant:
Inventor:
Richard S Jones, Swansea, SC (US);
Assignee:
Union Switch & Signal Inc., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ; B61L / ;
U.S. Cl.
CPC ...
318281 ; 318286 ; 318293 ; 246128 ;
Abstract
Highway crossing gate control circuit in which a permanent magnet motor is controlled to drive up and drive down the gate arm by utilization of a single motor control relay and controller contacts which sense the position of the gate arm. The motor polarity is reversed through utilization of the motor control relay, which is operated by a single up input signal. Provision is included for dynamic breaking on the arm moving downward after an initial drive down mode.