Keith D Fraley

US Patent:

53193644, Jun 7, 1994

Filed:

Apr 24, 1990

Appl. No.:

7/513900

Inventors:

Thomas J. Waraksa - Clarkston MI
Keith D. Fraley - Drayton Plains MI
Richard E. Kiefer - Boulder CO
Daniel G. Douglas - Louisville CO
Lee H. Gilbert - Boulder CO

Assignee:

Lectron Products, Inc. - Rochester Hills MI

International Classification:

G08C 1900
E05B 6536

US Classification:

34082572

Abstract:

A passive keyless entry system is disclosed that is specifically adapted for use with automotive vehicles. The system is designed to automatically unlock the vehicle as the operator approaches the vehicle. The system is further designed to automatically lock the vehicle as the operator, carrying the beacon, moves away from the vehicle. The system includes a portable beacon that is carried by the operator, a receiver/controller located in the vehicle, and an antenna connected to the receiver/controller for receiving the encoded transmission from the beacon. The beacon includes a motion sensor to conserve battery life when the beacon is stationary. Transmission between the beacon and the receiver/controller is characterized by a magnetically coupled radio frequency signal embodying differential phase encoded data with error correction coding of the data to enhance noise immunity and signal discrimination.

US Patent:

55150365, May 7, 1996

Filed:

Jan 26, 1995

Appl. No.:

8/378945

Inventors:

Thomas J. Waraksa - Clarkston MI
Keith D. Fraley - Drayton Plains MI
Richard E. Kiefer - Boulder CO
Daniel G. Douglas - Louisville CO
Lee H. Gilbert - Boulder CO

Assignee:

Lectron Products, Inc. - Rochester Hills MI

International Classification:

G08C 1900

US Classification:

340825720

Abstract:

A passive keyless entry system that is specifically adapted for use with automotive vehicles is designed to automatically unlock the vehicle as the operator approaches the vehicle. The system is further designed to automatically lock the vehicle as the operator, carrying the beacon, moves away from the vehicle. The system includes a portable beacon that is carried by the operator, a receiver/controller located in the vehicle, and an antenna connected to the receiver/controller for receiving the encoded transmission from the beacon. The beacon includes a motion sensor to conserve battery life when the beacon is stationary. Transmission between the beacon and the receiver/controller is characterized by a magnetically coupled radio frequency signal embodying differential phase encoded data with error correction coding of the data to enhance noise immunity and signal discrimination.

US Patent:

49423932, Jul 17, 1990

Filed:

May 27, 1988

Appl. No.:

7/199476

Inventors:

Thomas J. Waraksa - Clarkston MI
Keith D. Fraley - Drayton Plains MI
Richard E. Kiefer - Boulder CO
Daniel G. Douglas - Louisville CO
Lee H. Gilbert - Boulder CO

Assignee:

Lectron Products, Inc. - Rochester Hills MI

International Classification:

G08C 1900
E05B 6536

US Classification:

34082572

Abstract:

A passive keyless entry system is disclosed that is specifically adapted for use with automotive vehicles. The system is designed to automatically unlock the vehicle as the operator approaches the vehicle. The system is further designed to automatically lock the vehicle as the operator, carrying the beacon, moves away from the vehicle. The system includes a portable beacon that is carried by the operator, a receiver/controller located in the vehicle, and an antenna connected to the receiver/controller for receiving the encoded transmission from the beacon. The beacon includes a motion sensor to conserve battery life when the beacon is stationary. Transmission between the beacon and the receiver/controller is characterized by a magnetically coupled radio frequency signal embodying differential phase encoded data with error correction coding of the data to enhance noise immunity and signal discrimination.