NASA NTRS · 19660000710
Simple motor drive system operates heavy hinged door
Abstract
Motor drive system remotely operates heavy steel radiation shielding doors. The drive consists of a standard motor reducer unit which is mounted on the door. This reducer drives a sprocket which is linked by chain to a fixed sprocket of the same size on the door jamb.
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Pitkin, R. G.. 1966-12-01. Simple motor drive system operates heavy hinged door. https://ntrs.nasa.gov/citations/19660000710
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