Power equipment warning device

Details Power equipment warning device Power equipment warning device

1992-04-20

1993-11-23

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

49 31, 318103, 340522, 340540, 34082531, G08B 2100

Patent

active

052648346

ABSTRACT:
A safety message announcing device is interconnected to a machine so as to make the machine inoperative until the safety message has been announced. A control signal is provided along with the safety message. A control mechanism interconnected to the start switch of the machine will only operate when the control signal is received. The control signal may take the form of multiple fixed frequency tones announced along with the message, with the control mechanism tuned to the tones to only enable the machine when the tones are heard by the control mechanism, thus assuring that the message has been announced as well. The control signal may take the form of a code that must be input by the operator before the machine will operate. This may be done with a visual as well as a sound annunciator.

REFERENCES:
patent: 3298010 (1967-01-01), DuBosa
patent: 3631447 (1971-12-01), Sulat et al.
patent: 3827040 (1974-07-01), Simmons
patent: 4785293 (1988-11-01), Shearer et al.
patent: 4821024 (1989-04-01), Bayha
patent: 4987403 (1991-01-01), Apfel
patent: 5165107 (1992-11-01), Hand et al.
Safety Announcement System Brochure.

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