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US 2011/0235820 A1Published application
Sound systems for model railroad locomotives
AssigneeQS Industries, Inc.
InventorFrederick E. Severson
Life of this patent
Estimating the term…
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.
Claims14
A method for improved audio performance in a model railroad locomotive comprising the steps of:
- providing a speaker disposed inside a cab of the locomotive;
- connecting the speaker to receive an electric audio signal to produce audible sounds;
- at least partially isolating a front side of the speaker from a back side of the speaker;
- and
- positioning the front side of the speaker toward the exterior of the locomotive.
2 more elements
A method for improved audio performance in a model railroad locomotive having a speaker and a chassis, the method comprising the steps of:
- mounting the speaker within the locomotive spaced over the chassis;
- at least partially isolating front and back sides of the speaker;
- venting the front side of the speaker to the exterior of the locomotive;
- and
- venting the back side of the speaker into an interior volume of the locomotive.
2 more elements
Dependencies are inferred from the claim text.