Radio frequency message apparatus for aiding ambulatory travel of visually impaired persons
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Sep 1, 1992
Grant Date -
N/A
app pub date -
Oct 17, 1990
filing date -
Oct 17, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A radio frequency message apparatus for aiding ambulatory travel by handicapped persons such as blind individuals. The apparatus generally comprises a portable, radio frequency transceiver and a stationary, radio frequency base transceiver unit. The portable radio frequency transceiver is carried on the person of the handicapped individual and transmits a message request signal in response to manual activation of a transmit button thereon by the handicapped individual. The message request signal is received by the base transceiver, which causes the base transceiver to transmit a pre-recorded message signal back to the portable transceiver unit in radio frequency form. The message signal contains location identifying information such as the streets of an intersection at which the base unit is located. The portable transceiver has a limited transmission range of preferably about 20-50 feet to enable it to interrogate a single base transceiver unit located at an intersection within a metropolitan area or at a display/exhibit within a recreational facility such as a zoological park without accidentally interrogating base transceivers in the near vicinity of the desired base transceiver. In a preferred embodiment, an electronic compass is included within the portable transceiver to further aid a visually handicapped individual in orientating himself/herself with respect to North, South, East and Westerly directions.
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