Research/Patents/US 5022742
US 5022742Tier 3 — General Defense

FAST SHUTTER FOR PROTECTION FROM ELECTROMAGNETIC RADIATION

Assignee

US Government

Filed as: UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY, THE

Filed

Oct 3, 1983

Granted

Jun 11, 1991

Location

FALLS CHURCH VA US

Abstract

A solid state shutter for blocking EMP is disclosed. The shutter includes thin films of amorphous semiconductor material fro the Group V or VI elements deposited on a silicon dioxide substrate. An antenna senses incident EMP causing a trigger circuit to apply a voltage across the thin films. The thin films switch from a state of high resistance to a state of low resistance for blocking passage of the EMP.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Oct 18, 1985

Rescinded

Sep 6, 1990

Duration

4 years, 10 months

Inventor

  • 1FRANKLIN D. HAINS

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Back to patent indexSource: USPTO 35 USC §181 secrecy order records