Pickett N-515-T Slide Rule Cleveland Institute of Electronics USA Made, Unused!

Description

This is New condition, (I am the original owner and never used it) Pickett N-515-T Slide Rule. It is for use specifically in the electrical engineering field.
History:
In the 1960s, Carl Smith (Founded Cleveland
Institute
in 1934) commissioned Pickett & Eckel Company to manufacture a slide rule
tailored toward the school's course modules. The model became known as the Pickett N515-T Electronic Slide Rule.
12” white aluminum linear slide rule has a nylon cursor. (The N in the model number is for "nylon," and the T denotes the rule's "traditional" white color.) The rule is held together with stamped aluminum contoured posts. The front of the base has (Lr) H, (fx)2Π, A, D, L, and Ln scales. The front of the slide has (Cr) B, S, T, CI, and C scales. The left end of the slide is marked (facing vertically): ELECTRONIC (/) MODEL N-515-T. The back of the rule contains various formula's relating to electronics, such as temperature conversion, Ohm's Law for AC and DC circuits, parallel resistance, coupled inductance, and efficiency. Short (approximately 4 inches) scales on the slide are used with the reactance and resonance decimal point located at the left end of the rule. A logo at the right end of the slide the Cleveland Institute of Electronics logo. The lower right corner of the back of the rule is marked: CLEVELAND INSTITUTE (/) OF ELECTRONICS (/) CLEVELAND, OHIO 44114 (/) PATENT NO. 3,120,342 (/) MADE IN U.S.A. The Cleveland Institute of Electronics worked with Pickett & Eckel, Inc., to develop this slide rule. In 1958, Darrell L. Geiger, an instructor at the Cleveland Institute, applied for a patent for a slide rule useful in calculations relating to electronics. Patent 3,120,342 was granted in 1964 and incorporated into the Pickett Model N-515 slide rule. The Cleveland Institute, a distance education institution, utilized programmed learning.