Movable or removable closures – Plural wings radiate from common pivot; i.e. – revolving – Wings fold for through passage
Patent
1982-05-04
1984-07-10
Downey, Kenneth
Movable or removable closures
Plural wings radiate from common pivot; i.e., revolving
Wings fold for through passage
49 2, E05D 1502
Patent
active
044584474
ABSTRACT:
A revolving door system has a central axis defining center shaft and three wing hangers rigidly joined and extending in equidistant spaced apart relationship about the center shaft's upper portion. Pivots couple three planar upright wings in closely spaced apart relationship to the center shaft. A magnetic latch on each wing hanger is spaced apart from the central axis more remote than the pivot, releasably maintaining the wings in ganged alignment with the hangers.
A pair of facing substantially semicircular walls, spaced apart to define regions of ingress and egress, partially surrounds the wings and shaft on opposite sides. Each wall has two adjacent movable side panels hinged on opposite sides of a center panel, movable from a nominally enclosing position to an open panic position.
Disposed remote from the adjacent side panel, a magnetic latch releasably maintains the side panels in circular alignment with the enclosure. A smoke detector is coupled to the electromagnetic latch means to cause a disengagement of the latch means in response to an indication.
In a panic situation, release of the latch allows the wings to be released from the hangers and pivoted freely while the side panels are allowed to pivot about the hinges to enhance the egress frontage to thereby potentially increase the flow of people exiting from the building structure.
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Security Engineering, Inc., Catalog Sheet, Series 16.9a/Sc, no date.
"Commutator Powered Rotating Signs", no literature or date available but well prior to the filing of this application.
Blackston Michael D.
Heise Stanley R.
Zekich Michael B.
Downey Kenneth
Heise Manufacturing Co., Inc.
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