Alexander A Conrad

US Patent:

7061396, Jun 13, 2006

Filed:

Apr 13, 1995

Appl. No.:

08/421810

Inventors:

Alexander Conrad - Neptune Beach FL, US
Charles Bell - Jacksonville FL, US

Assignee:

Dwyer Precision Products, Inc. - Jacksonville FL

International Classification:

G08B 5/22

US Classification:

34082549, 340 102, 340 106, 3405734, 340 727, 379 38

Abstract:

A locating and monitoring system includes transmitters worn by a person, animal, or equipment to transmit an unique identification code while moving about a facility. The code is transmitted by pulse bursts at diverse times during predetermined time intervals to prevent synchronization with resident signals in the facility. Receivers in the walls or ceilings of the facility respond to the infrared radiation of the pulse bursts and validate the identification code by a checksum of the code through a comparison with a checksum transmitted with the code. The receivers deliver validated codes to arbitrators and receive back signals indicative of the level of an individual assigned to a class wearing the transmitters. Signals from the receivers are received by arbitrators which forward the codes to a CPU for recording start and stop events indicative of movement by transmitters into and out of the reception range of the various receivers.

US Patent:

54264251, Jun 20, 1995

Filed:

Oct 7, 1992

Appl. No.:

7/957662

Inventors:

Alexander Conrad - Neptune Beach FL
Charles Bell - Jacksonville FL

Assignee:

Wescom, Inc. - Jacksonville FL

International Classification:

G08B 522
G08B 2300
H04Q 139

US Classification:

34082549

Abstract:

A locating and monitoring system includes transmitters worn by a person, animal, or equipment to transmit an unique identification code while moving about a facility. The code is transmitted by pulse bursts at diverse times during predetermined time intervals to prevent synchronization with resident signals in the facility. Receivers in the walls or ceilings of the facility respond to the infrared radiation of the pulse bursts and validate the identification code by a checksum of the code through a comparison with a checksum transmitted with the code. The receivers deliver validated codes to arbitrators and receive back signals indicative of the level of an individual assigned to a class wearing the transmitters. Signals from the receivers are received by arbitrators which forward the codes to a CPU for recording start and stop events indicative of movement by transmitters into and out of the reception range of the various receivers.