Insignia Description
A silver color metal and enamel device 1 1/8 inches (2.86cm) in height overall consisting of a shield blazoned: Argent, on a fess Tenné an ogress throughout fimbriated of the first surmounted by two lightning flashes of the like, that issuing from the dexter side point to base and that on the sinister reversed, in chief a fleur-de-lis of the second.

Symbolism
Orange and white are used for the Signal Corps. The fess crossing the field is used to represent a wire or cable and the black circle, the soft iron diagram in telegraphic equipment. The lightning flashes allude to the currents which cause the diaphragm to vibrate and thus transmit sound. The black circle thus symbolizes a sounding board from all types of signal apparatus and its construction and maintenance. The fleur-de-lis signifies combat service in Europe during World War II.

History
The distinctive unit insignia was originally approved for the 41st Signal Construction Battalion on 19 Oct 1953. It was redesignated for the 41st Signal Battalion on 24 Oct 1956.

Source: The US Army Institute of Heraldry