Einrichtung zum Ermitteln des Ausfalls einer Lampe und zum Ersetzen der Lampe

1298443 Lamp changer MINNESOTA MINING & MFG CO 9 Jan 1970 [10 Jan 1969] 1265/70 Heading F4R [Also in Divisions G4 and H2] A projection system has a solid-state detector 35 for detecting the failure of a main lamp 40 and replacing it by an auxiliary lamp 42. The detector 35 actuates a solenoid 51...

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Bibliographische Detailangaben
Hauptverfasser:	ALPHONSE LIND,PETER, PETER BLOMGREN,JACK, LOREN ROSS,STANLEY
Format:	Patent
Sprache:	ger
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM BLASTING CINEMATOGRAPHY ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY ELECTROGRAPHY FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF HEATING HOLOGRAPHY LIGHTING MECHANICAL ENGINEERING PHOTOGRAPHY PHYSICS STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR WEAPONS
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Beschreibung
Zusammenfassung:	1298443 Lamp changer MINNESOTA MINING & MFG CO 9 Jan 1970 [10 Jan 1969] 1265/70 Heading F4R [Also in Divisions G4 and H2] A projection system has a solid-state detector 35 for detecting the failure of a main lamp 40 and replacing it by an auxiliary lamp 42. The detector 35 actuates a solenoid 51 which pulls back the spring 41 off step 52 and thereby permits spring 38 to move the support 36. The two lamps may be mounted on the same wall of the support. In use a transparency is placed on glass stage 16 and the light is focused by Fresnel lens 18. An indicator lamp 73 is energized when the main lamp fails. The lamp changing system may also be applied to traffic lights.