Joseph E Morgan

US Patent:

40926338, May 30, 1978

Filed:

May 21, 1976

Appl. No.:

5/688856

Inventors:

James C. Administrator of the National Aeronautics and Space Fletcher
John T. Polhemus - Englewood CO
Joseph E. Morgan - Friendswood TX
Arthur Mandell - Seabrook TX

International Classification:

G08B 2100

US Classification:

340213R

Abstract:

The condition sensor system comprises a condition detector which produces a pulse when a parameter of the monitored condition exceeds a desired threshold. A resettable condition counter counts each pulse. A resettable timer is preset to produce a particular time frame. The counter produces a condition signal when the accumulated number of pulses within the time frame is equal to or greater than a preset count. Control means responsive to the incoming pulses and to the condition signal produce control signals that control utilization devices. After a suitable delay, the last detected pulse simultaneously resets the pulse counter and the timer, and prepares them for sensing another condition occurrence within the time frame. The invention has particular utility in the process of detecting rocking motions of blind people. A controlled, audible, bio-feedback signal is provided which constitutes a warning to the blind person that he is rocking.