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Ray-O-Vac Advertisement
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 Here is an advertisement by Ray-O-Vac from the August 25, 1945, edition of the Saturday Evening Post. As with many of the advertisements of the era, this ad refers to the company's contribution to the war effort during WWII, to wit, "Proven by our fighters - First choice for YOU." In today's market, a leak-proof battery is assumed, but early dry cells (which sometimes were actually wet cells) were notorious for oozing electrolyte when subject to impact or vibration. At least when a modern dry cell starts leaking, the most it might do is cause corrosion of metallic contacts and some build-up on a plastic case. Some of the old cells were fierce enough to eat through just about anything they were in. Of course, now that lithium polymer batteries are routinely replacing carbon, alkaline, Ni-Cad and NiMH cells, the nasty habit of sometimes exploding during the charging cycle can be very messy. Do a YouTube search sometime on Li-Po explosions.
Other Saturday Evening Post Ads & Articles:
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RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived... All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged. My Hobby Website: AirplanesAndRockets.com
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