Communications: electrical – Condition responsive indicating system – Specified indicator structure
Patent
1998-06-06
1999-11-16
Mullen, Thomas
Communications: electrical
Condition responsive indicating system
Specified indicator structure
340326, 340679, 3406914, 3406916, 340692, 3406935, 3406939, G08B 300
Patent
active
059865610
ABSTRACT:
An apparatus is provided for the automatic advance warning of imminent automatic door closure to passengers of public transportation vehicles. Comprised of a panel mounted above the automatic door, comprising an alarm light, a message display area, and a speaker capable of producing audible alarm warnings as well as audible verbal warning messages, it is capable of warning incoming passengers that automatic door closure is imminent. When a door close signal is received from existing door control circuitry, the apparatus is activated and it produces the audible and visual warning messages. After an appropriate delay period the audible and visual warning devices are deactivated and a door close signal is issued to the existing automatic doors and associated door safety guard circuitry.
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Kuruvilla Kolanparampil K.
Kuruvilla Santhamma
Mullen Thomas
Volk David L.
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