Browse Prior Art Database

Audio Direction Finder

IP.com Disclosure Number: IPCOM000095176D
Original Publication Date: 1965-Sep-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Pietenpol, DD: AUTHOR

Abstract

In the form of a small, self-contained unit, this device enables one without a visual frame of reference, such as a blind person, to readily obtain a directional bearing. Compass 1 is attached to mask 2 having aperture 3. Whenever switch 9 is closed and 1 points north, aperture 3 permits light from lamp 4 to illuminate photodiode 5. This turns off transistor 6, unlocking the free-running multivibrator including transistors 7 and 8. The output from the multivibrator causes an audible tone to be generated in speaker 11.

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Audio Direction Finder

In the form of a small, self-contained unit, this device enables one without a visual frame of reference, such as a blind person, to readily obtain a directional bearing. Compass 1 is attached to mask 2 having aperture 3. Whenever switch 9 is closed and 1 points north, aperture 3 permits light from lamp 4 to illuminate photodiode 5. This turns off transistor 6, unlocking the free-running multivibrator including transistors 7 and 8. The output from the multivibrator causes an audible tone to be generated in speaker 11.

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