Electric lamp and discharge devices: systems – Combined load device or load device temperature modifying... – Filament – electric heater – or resistance in shunt with the...
Patent
1991-05-28
1992-01-07
Mis, Davis
Electric lamp and discharge devices: systems
Combined load device or load device temperature modifying...
Filament, electric heater, or resistance in shunt with the...
315 60, 315 71, 315 73, H05B 4106
Patent
active
050794809
ABSTRACT:
A high pressure lamp assembly having an improved structure for supporting the discharge tube while providing an opening bi-metallic switch for electrically disconnecting the auxiliary electrode. Metallic frames are disposed at the upper and lower ends of the discharge lamp to provide at least partial support to the discharge tube. A non-conductive bridge assembly is connected between the lead through of the auxiliary electrode and a conductive rod extending from the stem. The non-conductive bridge provides at least partial mechanical support to the discharge tube. Connected across the non-conductive bridge is the starting resistor and bi-metallic switch element. When the bi-metallic element is unheated, it provides electrical connection through the starting resistor to the auxiliary electrode. When heated by the heat from the discharge tube, the bi-metallic switch moves out of engagement with the ceramic bridge and thus breaks the electrical connection to the auxiliary electrode.
REFERENCES:
patent: 4097777 (1978-06-01), Bacharowski
patent: 4179640 (1979-12-01), Larson et al.
patent: 4437039 (1984-03-01), Larson
patent: 4445073 (1984-04-01), Wyner et al.
Photographs of Iwasaki MH175/V High Pressure Sodium Vapor Lamp.
Drawings of Device Similar to GE High Pressure Sodium Vapor Lamp.
Canale Joseph E.
King Norman R.
Botjer William L.
Mis Davis
North American Philips Corp.
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