Obstruction-responsive brake actuator for fire door or the like
作者： James M. McKeon
DOI:
关键词:
摘要: A brake actuator for use in conjunction with a door barrier preventing closure of the when comes contact an obstruction. The includes bumper mounted on leading edge and movable between operative position inoperative position. load carrying linkage is provided which activated moved to connected becomes engaged activated, thus movement closed contacts
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