System for guiding the visually handicapped

• US 6,867,697 B2
• Filed: 04/01/2002
• Issued: 03/15/2005
• Est. Priority Date: 04/01/2002
• Status: Expired due to Fees

• Current Assignee: Anya R. Nanayakkara, Lakdas Nanayakkara, Pravin L. Nanayakkara
• Original Assignee: Anya R. Nanayakkara, Lakdas Nanayakkara, Pravin L. Nanayakkara
• Inventors: Nanayakkara, Lakdas, Nanayakkara, Pravin L., Nanayakkara, Anya R.
• Primary Examiner(s): MULLEN, THOMAS J
• Application Number:
  US10/112,668
• Publication Number:
  US 20030184441A1
• Time in Patent Office: 1,079 Days
• Field of Search: 340/573.1, 340/573.4, 340/407.1, 340/825.19, 340/825.49, 340/541, 340/561, 342/24, 367/118, 701/200, 701/205
• US Class Current: 340/573.1
• CPC Class Codes: A61H 2003/063 with tactile perception
• CPC Class Codes: A61H 2003/065 in the form of braille
• CPC Class Codes: A61H 3/061 with electronic detecting or guiding means
• CPC Class Codes: A61H 3/066 Installations on the floor, e.g. special surfaces, to guide blind persons
• CPC Class Codes: A61H 3/068 Sticks for blind persons
• CPC Class Codes: G08G 1/005 including pedestrian guidance indicator
• CPC Class Codes: G09B 21/007 using both tactile and audible presentation of the information

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.

Claims

1. A system for guiding the visually handicapped, comprising:

(a) a continuous electrical conductor of a substantially uniform conductivity embedded within a walkway to be traversed by a user;

(b) means for detecting proximity of an object to said conductor, said object selected from the group consisting of a shoe of said user and a tip of a walking cane; and

(c) signalling means in electrical communication with said detecting means.

2. The system as recited in claim 1, in which said signalling means comprises vibratory means.

3. The system as recited in claim 2 further comprising:

switch means, within an electrical circuit including said detecting means, for closing said circuit responsive to movement of said object.

4. The system as recited in claim 2 further in which said electrical conductor comprises:

an irregularity of conductivity thereof provided at walkway locations of interest to a user.

5. The system as recited in claim 4 in which said locations of interest include walkway intersections, bathrooms, and Braille-coded information centers.

6. The system as recited in claim 4 further comprising means for providing different patterns of irregularity to indicate different advisories to the system user.

7. The system as recited in claim 2 in which said conductor and a second conductor comprise a pair of parallel conductors.

8. The system as recited in claim 2 in which said walkway comprises a pedestrian crossing at a public street.

9. The system as recited in claim 2 in which said walkway comprises a corridor within an enclosed structure.

10. The system as recited in claim 2 in which said walkway comprises a pathway within a residential structure.

11. The system as recited in claim 2 in which said vibratory means comprises a part of a shoe or heel of a shoe.

12. The system as recited in claim 1 further comprising:

switch means, within an electrical circuit including said detecting means, for closing said circuit responsive to movement of said object.

13. The system as recited in claim 12 further comprising:

manual switch means for activating said proximity detecting means by said user to initiate system use.

14. A method for guiding the blind, comprising the steps of:

(a) installing a continuous conductor within a walkway to be traversed by a user;

(b) embedding a sensor for detecting proximity of said conductor within a shoe or heel sole of a shoe of said user; and

(c) providing signalling means in electrical communication with said sensor.

15. The method as recited in claim 14 further comprising the step of:

providing means for enabling said sensor responsive to motion of said shoe.

16. The system as recited in claim 14 further comprising the step of:

providing a gradient or irregularity in the conductivity of said conductor at intersections, rest rooms, and other locations of significance to the user with said walkway.