Kenneth J Swanson

US Patent:

57876207, Aug 4, 1998

Filed:

Apr 19, 1996

Appl. No.:

8/639936

Inventors:

Jerome Swanson - Cannon Falls MN
Kenneth Swanson - Apple Valley MN

Assignee:

LaCrosse Sign Co. - Onalaska WI

International Classification:

G09F 1118

US Classification:

40521

Abstract:

A back lit alphanumeric sign module having a printed web which includes opaque and transparent regions that define alphanumeric characters. The web is trained between end plates having illumination cutouts and which support a spring biased take-up-roller, drive roller, a pair of transparent idler rollers and tie rods. A spiral wound spring at the take-up roller continuously tensions the web. A biased latch arm and slot at the take-up and drive rollers define web stop limits. A split, spring biased ratchet collar is provided in manual modules. The split ratchet collar at the manual drive roller provides a one-way geared rotation and cooperates with a pole engaged loop to vary rotation and sign information. A pulse modulated motor controller drive is provide at the electric module. A remote controller at the electronic module provides programmed and operator entered spread spectrum drive signals over a power line carrier circuit to the drive motor to vary sign information.