Fire escape – ladder – or scaffold – With indicator – signal or alarm
Patent
1997-10-01
1998-12-29
Chin-Shue, Alvin
Fire escape, ladder, or scaffold
With indicator, signal or alarm
182204, E06C 700
Patent
active
058530657
ABSTRACT:
An adjustable leg ladder assembly that includes a collapsible A-frame ladder structure including a top plate, a forward ladder step support including two forward support legs, and a rear A-frame support including two rear support legs; left and right forward leg adjustment inserts each slidably and lockably positionable into one of the forward support leas of the forward ladder step support; left and right rear leg adjustment inserts each slidably and lockably positlonable into one of the rear support legs of the rear A-frame support; and a weight sensing unit including a sensor output conditioning circuit, four weight sensors and four output displays; each of the four weight sensors being installed into the underside surface of one of the pivoting foot pads; the sensor output conditioning circut being in electrical connection with each of the sensor outputs from each of the four weight sensors and in electrical connection with each of the display inputs of the four output displays; the conditioning circuit providing four drive signals, one for each of the output displays; each of the output displays displaying a weight value that corresponds with the weight supported by a corresponding one of the four pivoting foot pads that has the corresponding weight sensor installed therein.
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Hutson Barbara J.
Hutson Emory R.
Breaux Joseph N.
Chin-Shue Alvin
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