Communications: electrical – Digital comparator systems
Patent
1983-06-06
1986-09-23
Caldwell, Sr., John W.
Communications: electrical
Digital comparator systems
340 74, 340 79, 340102, B60Q 100
Patent
active
046138463
ABSTRACT:
A passing signal light system is shown in form for retrofit installation on trucks or the like and includes a panel with recesses for one or more amber system indicating light units and two or more green or blue signal light units along with a switch for directing current to either the amber or the green/blue light units and a flasher that permits only pulsating current to reach the green/blue light units.
REFERENCES:
patent: 2400655 (1946-05-01), Saia
patent: 2975401 (1961-03-01), Shupe
patent: 3123802 (1964-03-01), Priesemuth
patent: 3441906 (1969-04-01), Nielsen
patent: 3622980 (1971-11-01), Elledge
patent: 3648101 (1972-03-01), Suzuki
patent: 3733515 (1973-05-01), Parkes
patent: 4195281 (1980-03-01), Bell
Brier Jeffery A.
Caldwell Sr. John W.
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