Signal light with precessing oscillation control

Details Signal light with precessing oscillation control Signal light with precessing oscillation control

1981-08-31

1983-06-14

Yusko, Donald J.

Communications: electrical

Selective

Having indication or alarm

340 50, 340 49, B60Q 100

Patent

active

043886094

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.

REFERENCES:
patent: 2221483 (1940-11-01), Kennelly
patent: 2409046 (1946-10-01), Kennelly
patent: 2417934 (1947-03-01), Kennelly
patent: 2510892 (1950-06-01), Kennelly
patent: 2607838 (1952-08-01), McDowell
patent: 2666193 (1954-01-01), Keegan
patent: 2677121 (1954-04-01), Heehler
patent: 3546669 (1970-12-01), Kennelly
patent: 3821541 (1974-06-01), Burland

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