Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2005-03-15
2005-03-15
Mullen, Jr., Thomas J (Department: 2632)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S407100, C340S870030
Reexamination Certificate
active
06867697
ABSTRACT:
A system for guiding of the visually handicapped includes a continuous electrical conductor, in the nature of a wire or strip, having a substantially uniform conductivity embedded within a walkway to be traversed by the handicapped person. The system also including a proximity for detecting the conductor in which the detector may be in a shoe of the user or a tip of a walking cane. The system further includes a signalling element, in the nature of a vibrator, in electrical communication with the detector such that, through the presence of such vibration, the visually handicapped person is able to determine his proximity to the electrical conductor to determine that he is proceeding in a proper direction within or along the walkway. The signalling element is preferably provided with a switch, for example, a mercury switch, so that the shoe or cane circuit will become energized only upon the occurrence of movement or motion of the shoe or cane within which the proximity detector is located. The approach by a user to a location of interest along the walkway, such as an intersection, bathroom, or Braille telephone, may be indicated through the provision of a pattern of irregularity of the conductivity within the continuous electrical conductor. Different patterns of irregularity may indicate different advisories to the user.
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Nanayakkara Anya R.
Nanayakkara Lakdas
Nanayakkara Pravin L.
Mullen, Jr. Thomas J
Silverman M. K.
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