August 1967 Electronics World
Wax nostalgic about and learn from the history of early electronics. See articles
Electronics World, published May 1959
- December 1971. All copyrights hereby acknowledged.
It wasn't until February 1 1972, that
Hewlett-Packard introduced the
HP-35 electronic calculator. Before that, when you spoke of an electronics
calculator it referred to a computer (likely a vacuum tube type), a human who specialized
in electronics calculations, or this special slide rule sold by Cleveland Electronics Institute
- the 515-T. It had special scales for calculating reactance, and resonance, and had common
circuit analysis formulas printed on the back side.
Here is an RF Cafe web page dedicated to engineering slide rules and my small collection that includes a 515T. I
will gladly accept a donation and credit you accordingly.
Start Using This Remarkable Electronics Slide Rule
Be the man who's always first to say: "I've got the answer right here!"
Some day everyone in electronics may have a slide rule like this. Till then, the man who
uses one will seem like a wizard as he solves reactance and resonance problems in 12 to 20
seconds - without pencil and paper.
Cleveland Institute 515-T
Slide Rule(made by Pickett)
Send me an
e-mail if you want a PDF file of a partial (10 pages) copy of the instruction
[Buy the complete manual set
This is a professional slide rule in every detail, a full 10" long, made exclusively for
Cleveland Institute of Electronics, to our rigid specifications, by Pickett, Inc. It can be
used for conventional computation as well as special electronics calculations. All-metal construction
assures smooth operation regardless of climate.
Handsome top-grain leather carrying case has heavy-duty plastic liner to protect slide
rule; removable belt loop for convenient carrying. "Quick-flip" cover makes it easy to get
rule in and out of case.
You also get four full-length AUTO-PROGRAMMED™ Lessons, which teach you how to use
the special electronics scales on the slide rule. These lessons have been carefully designed
to meet the same high educational standards as the electronics career courses for which our
school is famous. Even if you've never used a slide rule before, you'll soon whiz through
the toughest problems with this CIE rule.
Deliberately underpriced. Many men in electronics have told us that this unique slide rule,
leather case, and 4-lesson course easily add up to a $50 value. But we have deliberately underpriced
it at less than $25. Why? Our reason is simple: we are looking for men in electronics who
are ambitious to improve their skills ... who know that this will require more training. If
we can attract you with the low price of our slide rule and course-and impress you with its
quality - you are more likely to consider CIE when you decide you could use more electronics
Send for free booklet. See for yourself why this amazing slide rule and course have made
such a big hit with busy electronics men everywhere. No obligation, of course - just an opportunity
to get in on the best offer ever made to people in electronics. Just mail coupon, or write
Cleveland Institute of Electronics, Dept. EW-142, 1776 East 17th St., Cleveland, Ohio 44114.
Cleveland Electronics Institute's "Electronics Slide Rule"
Here is the original scan.
Posted May 6, 2013