Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1996-10-18
1999-08-17
Wu, Daniel J.
Communications: electrical
Condition responsive indicating system
Specific condition
340539, 340541, 455 41, G08B 2300
Patent
active
059399864
ABSTRACT:
A warning system is provided for a mobile working machine to alert an individual of a potentially dangerous condition in the event the individual strays into a hazardous working zone of the machine. The warning system includes a transmitter mounted on the machine and operable to generate a uniform magnetic field projecting beyond an outer periphery of the machine in defining a hazardous working zone around the machine during operation thereof. A receiver, carried by the individual and activated by the magnetic field, provides an alarm signal to alert the individual when he enters the hazardous working zone of the machine.
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patent: 5047752 (1991-09-01), Schorn
patent: 5086290 (1992-02-01), Murray et al.
patent: 5198800 (1993-03-01), Tozawa et al.
patent: 5477210 (1995-12-01), Belchre
patent: 5575242 (1996-11-01), Davis et al.
Ganoe Carl W.
Schiffbauer William H.
Dvorscak Mark P.
LaMarre Mark F.
Moser William R.
The United States of America as represented by the United States
Wu Daniel J.
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