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Innovations archive

Technology & Computing

The precision wire resistor

1950sChicago, IllinoisOtis Frank Boykin Documented

The problem

Resistors drifted with heat, vibration and atmospheric pressure, so circuits that had to behave identically every time — in computers, instruments, aircraft and medical devices — could not be trusted.

The innovation

A wire-wound resistance element designed so its value held under thermal and mechanical stress, and could be manufactured cheaply and consistently.

How it worked

Boykin's patents cover the winding, the resistive material and the encapsulation that together resist shock and temperature change.

Why it mattered

The components were adopted across consumer electronics, computing and guidance systems, where drift is a failure.

The legacy

Reliable passive components are invisible until they fail; they are the reason precision electronics — including implanted cardiac devices — became dependable.

You use this today

Any circuit board that has to give the same answer twice.

Sources

  1. [1]Granted patents of Otis F. Boykin, electrical resistance element series

    Primary record

    United States Patent and Trademark Office · Patent record

  2. [2]Otis Boykin inventor record

    Institutional record

    Lemelson Center, Smithsonian Institution · Museum