Illumination – Automatic substitution of power supply or light source
Patent
1978-07-31
1980-09-30
Gonzales, John
Illumination
Automatic substitution of power supply or light source
200 11R, 200144R, 200253, 200275, 339 75T, 339 91L, 362249, 362254, 362226, F21V 1904, F21V 2100, H01H 160, H01R 1362
Patent
active
042259010
ABSTRACT:
A lampchanger for a light, such as a navigational light, having a rotatable turret for holding a plurality of lamps, fixed power contacts for engaging and lighting the lamp positioned in the operating position, and means for rotating the turret thereby placing a new lamp into operating position when a lamp burns out. The turret includes a body and a clamp yieldably urged against the body for releasably holding and locking the lamps between the clamp and the body. Lamps may slide into a tapered slot between the body and the spring-loaded clamp and are locked into place. Tilting the lamp towards the spring-loaded clamp releases the lamp. A stop limits the movement of the clamp on removing one lamp without releasing other lamps. The turret is of metal and has cooling fins for radiating heat energy. The electrical power contacts include a flat spring contact spiraling outward from the turret axis to pierce any oxides on the lamp contacts in advance of reaching the operating position. A C-shaped insulator supports the spring contacts and compensates for dimensional changes in the insulator. The insulator includes a guide recess for receiving the spiral electrical contacts. The gap in the C-shaped insulator is positioned in advance of the lamp operating position at the location where a lamp first engages thecontact.
REFERENCES:
patent: 1276766 (1918-08-01), Howe
patent: 2195374 (1940-03-01), Wallace et al.
patent: 2749527 (1956-06-01), Gast
Gonzales John
Tarcza Thomas H.
Tideland Signal Corporation
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