| US 7,592,900 B2 | ||
| Transporter motor alarm | ||
| Dean Kamen, Bedford, N.H. (US); Burl Amsbury, Boulder, Colo. (US); Richard W. Arling, Windham, N.H. (US); J. Douglas Field, Bedford, N.H. (US); Jeffrey Finkelstein, Shelbourne, Vt. (US); John David Heinzmann, Manchester, N.H. (US); Christopher Langenfeld, Nashua, N.H. (US); Philip LeMay, Bedford, N.H. (US); John B. Morrell, Bedford, N.H. (US); and Jason M. Sachs, Goffstown, N.H. (US) | ||
| Assigned to DEKA Products Limited Partnership, Manchester, N.H. (US) | ||
| Filed on Oct. 25, 2006, as Appl. No. 11/552,829. | ||
| Application 11/552829 is a division of application No. 10/308888, filed on Dec. 03, 2002, abandoned. | ||
| Claims priority of provisional application 60/388937, filed on Jun. 14, 2002. | ||
| Claims priority of provisional application 60/347800, filed on Jan. 10, 2002. | ||
| Claims priority of provisional application 60/336601, filed on Dec. 05, 2001. | ||
| Prior Publication US 2007/0252683 A1, Nov. 01, 2007 | ||
| Int. Cl. G08B 3/10 (2006.01) | ||
| U.S. Cl. 340—384.7 [340/427; 340/428; 340/429; 340/441; 340/425.5; 180/6.28; 180/60; 180/65.1] | 4 Claims |
| 1. An audio alarm for a transporter of the type having an electric motor for driving the transporter by supplying a torque
to a drive arrangement, the alarm comprising:
a. a signal generator for generating a signal within the frequency range of hearing of a person; and
b. a modulator for modulating a current applied to the electric motor in accordance with the signal generated by the signal
generator to produce an audible alarm.
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