Microcontroller based automatic door obstruction detector

E - Fixed Constructions – 05 – F

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342/40

E05F 15/10 (2006.01) B66B 13/26 (2006.01) G05B 19/23 (2006.01)

Patent

CA 2021965

A microprocessor controlled automatic door opener including means for detecting the velocity and direction of travel of the door. The microcontroller evaluates detected changes in either the velocity or direction of travel to determine the cause, and either reverses door travel direc- tion of ignores the detection.

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