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:
Jun. 14, 1983
Filed:
Aug. 31, 1981
W Kenneth Menke, Glendale, MO (US);
Public Safety Equipment Company, St. Louis, MO (US);
Abstract
A signal light comprising a base, a lamp frame pivoted on the base on a first axis, a lamp pivoted on the lamp frame on a second axis extending generally perpendicular to the first axis, a first electric motor for oscillating the lamp frame on the first axis generally at a first rate of oscillation, and a second electric motor for oscillating the lamp on the second axis at a second rate of oscillation. The ratio of the first and second rates of oscillation change during operation of the signal light due to drift in the output speed of one motor relative to the output speed of the other motor whereby on oscillation of the lamp frame and lamp about their respective axes the beam of light projected by the lamp traces a changing pattern.