Sound systems for model railroad locomotives

Details Sound systems for model railroad locomotives Sound systems for model railroad locomotives

2011-06-07

2011-06-07

Le, Mark T (Department: 3617)

Railway rolling stock

Trains

Toy or model train

C105S157200, C105S238200, C381S345000, C381S349000

Reexamination Certificate

active

07954435

ABSTRACT:
On-board model railroad speaker enclosure designs are presented that allow maximum sized speakers, improve impedance matching of sound to the outside of the locomotive, and isolate back and front speaker waves while maintaining the standard horizontal drive-train in model train locomotives.

REFERENCES:
patent: 2791972 (1957-05-01), Smith
patent: 3600848 (1971-08-01), Marshall et al.
patent: 6578527 (2003-06-01), Mathers
patent: 7451708 (2008-11-01), Severson
patent: 2625446 (1989-07-01), None

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