Research/Patents/US 5049883
US 5049883

COMBINED MICROWAVE AND INFRARED CHAFF

Assignee

Filed

May 30, 1978

Granted

Sep 17, 1991

Location

Abstract

A long, slender thread or filament of a slow-burning substance is metalli, by evaporation, cold-spraying, or the like, with aluminum, zinc or other similar substance. A short length at one end is not metallized but is provided with means for igniting the filament when the chaff is dispensed. A bundle of these filaments are then packed in an impermeable foil envelope and preferably filled with an inert atmosphere. When dispensed, the cloud of slow-burning filaments perform toward infrared search or tracking devices in a manner analogous to the clutter signal created in radars by conventional chaff. At the same time, the metallic coating on the filament acts as a conventional chaff, giving a capability to interfere with either infrared or microwave devices and devices with a combination of infrared and microwave capabilities.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Sep 10, 1982

Rescinded

Apr 30, 1991

Duration

8 years, 7 months

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