Communications: electrical – Digital comparator systems
Patent
1976-10-07
1979-06-05
Caldwell, Sr., John W.
Communications: electrical
Digital comparator systems
340 87, 340 90, 340321, 40573, 40489, 40534, 40562, 116 63P, 362362, B60Q 702
Patent
active
041575318
ABSTRACT:
A signal lamp comprises a housing defining two openings of corresponding overall shape and size, and an electrical light source mounted in the housing to provide a light beam which leaves the housing by way of one of the openings. The lamp also comprises translucent members, each of which corresponds in overall shape and size to the shape and size of each of the two openings, and retaining nibs for retaining any one of the translucent members in the first opening, so that the light beam passes through that translucent member when leaving the housing, and for retaining any one at least of the translucent members in the second opening. At least one of the translucent members includes a color filter so that when that translucent member is fitted in the first opening the color of the light beam is modulated by the color filter.
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Caldwell Sr. John W.
Crosland Donnie L.
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