Prest-O-Lite®

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Prest-O-Lite®

Acetylene gas supplied in a small tank under an initial pressure of about fifteen atmospheres. The gas was burned in early automobile headlights. When the tank was empty, it could be exchanged for a full one.
1001 Words and Phrases You Never Knew You Didn’t Know by W.R. Runyan Copyright © 2011 by W.R. Runyan
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Whether it's a key chain opener from a local brewery, or an antique piece with a square Prest-O-Lite hole there's a connection.
Fisher went on to mastermind the Lincoln Highway, develop Miami Beach and Montauk, New York, and found (with Allison) the Indianapolis company that built Prest-O-Lite headlamps.