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:
Dec. 28, 2021
Filed:
Apr. 30, 2019
Applicant:
Bnsf Railway Company, Fort Worth, TX (US);
Inventor:
Ralph Young, Osawatomie, KS (US);
Assignee:
BNSF Railway Company, Fort Worth, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
H05B 45/10 (2020.01); B61L 29/28 (2006.01); B61L 13/00 (2006.01); B61L 9/04 (2006.01); H05B 45/44 (2020.01);
U.S. Cl.
CPC ...
B61L 29/288 (2013.01); B61L 9/04 (2013.01); B61L 13/002 (2013.01); H05B 45/10 (2020.01); H05B 45/44 (2020.01);
Abstract
A railroad crossing warning circuit includes a lamp and a signal generator for generating a first signal of a selected frequency. Divider circuitry divides the frequency of the signal to generate second signal at a flashing frequency. A switch responsive to the second signal controls current flow through the lamp and cause the lamp to flash at the flashing frequency.