Elevator – industrial lift truck – or stationary lift for vehicle – With visual indicator of movement of load support
Patent
1994-07-07
1995-07-18
Dougherty, Thomas M.
Elevator, industrial lift truck, or stationary lift for vehicle
With visual indicator of movement of load support
187398, 345 32, 345 44, B66B 300
Patent
active
054332958
ABSTRACT:
An indicating element for an elevator includes a cover plate having an opening formed therein through which a lens extends. Positioned behind the lens is a light diffuser having an area formed in the shape of a symbol to be displayed. A plurality of light emitting diodes are mounted on a front surface of a printed circuit board and the diodes extend into the diffuser. The front surface of the printed circuit board, as well as the side walls of the diffuser are white to achieve a better light reflection. The lens, the diffuser and the printed circuit board are mounted on studs extending from a rear surface of the cover plate and are retained by nuts. The light emitting diodes are connected together in separate groups with a first switch for connecting the groups in series to a higher voltage alternating current power supply and a second switch for connecting the groups in parallel to a lower voltage direct current power supply.
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Archer Semiconductor Reference Guide, 1987 Edition p. 15, F336HD Blinking LED.
Dougherty Thomas M.
Inventio AG
Nappi Robert
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