The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 06, 1987
Filed:
May. 14, 1984
George R Edlin, Huntsville, AL (US);
Robert A Snead, Huntsville, AL (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
A passive safety probe for placement in a time varying magnetic field to alert personnel when the power density of high intensity electromagnetic fields reach and exceed applicable personnel safety limits. The probe senses the magnetic field present with a loop antenna. The loop antenna produces a voltage output in response to the magnetic field. The output voltage is linearized by a frequency dependent filter and rectified to provide a direct current output which is subsequently coupled to an attention getting indicating means such as a light emitting diode and/or a horn. When detected field voltage exceeds the threshold of the indicating means, a visual or audible response occurs, indicating that safe field levels have been exceeded.