Object Record
Images
Metadata
Title |
Capacitance-Impedance Calculator, 1963 |
Object Name |
Calculator, Capacitor Impedance |
Description |
Capacitance-Impedance Calculator, 1963. Slide rule style capacitance-impedance calculator is made from three layers of cardboard printed with black and orange ink. The front and back pieces are attached together with metal rivets at each rounded corner. The front piece of cardboard has measurement markings printed on the surface and two rectangular pieces cut out on the left side. A slightly smaller piece of cardboard that has corresponding markings is sandwiched between the two exterior pieces. As this piece slides toward the right side, calculations are made by viewing how markings on the inner sliding piece match up with markings on the front side. The back side of the calculator contains several measurement charts. |
Date |
1963 |
Creator |
Perrygraf Corporation, Maywood IL |
Role |
Manufacturer |
Catalog Number |
2016.015.002.47 |
Dimensions |
H-3.125 W-8.375 D-0.125 inches |
Dimension Details |
3.125" x 8.375" x 0.125" |
Collection |
3D - Electrical & Magnetic Tools & Equipment |
Inscription Text |
"Slide-Chart Copr. 1963, PERRYGRAF Corp., Maywood, Ill." (printed on back at bottom left) |
Notes |
Electrical impedance is a complex ratio of voltage to current in an alternating current (AC) circuit. |
Search Terms |
Business and Industry Calculators Electronics Industry Manufacturing Raychem Corporation |
Subjects |
Business Electrical industry Industry Measuring Calculators |
Credit line |
Courtesy of the Raychemers |