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US 5,203,111 AGranted
Revolving door for the protection of the access to and/or exit from a room
AssigneeBoon Edam B.V.
InventorsJacob R. A. Huber, Erik J. Huber
Life of this patent
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AssigneeBoon Edam B.V.
InventorsJacob R. A. Huber, Erik J. Huber
Estimating the term…
A revolving door for the protection of the access to and/or exit from a room is provided with a revolving shaft having a number of door wings spaced evenly around it, a pair of panels at opposite ends bordering on the path followed by the door wings and forming a partly closed zone with a first and a second opening, a drive motor for the shaft and a control unit for the drive motor. Further a monitor unit is provided having a detection aerial, which aerial generates a detection field, such that when a person carrying an authorization card enters the detection field the monitor unit sends an enable signal to the control unit to turn the shaft through a predetermined angle in the direction of passage to allow the person to proceed from the one opening to the other. Each door wing comprises a detection aerial, means being provided to switch each aerial on and off in turn, such that when the revolving door is stationary only the detection aerial of that door wing is activated which, seen in the direction of passage, is in front of the person who wishes to enter or leave the protected room.
Revolving door for the protection of the access to and/or exit from a room, comprising a revolving shaft with a number of door wings spaced evenly around it, a pair of panels at opposite ends bordering on the path followed by the door wings and forming a partly closed zone with a first and second opening, a drive motor for the shaft and a control unit for the drive motor, including a monitor unit with a detection aerial, which aerial generates a detection field, such that when a person carrying an authorization card enters the detection field the monitor unit sends an enable signal to the control unit to turn the shaft through a predetermined angle in the direction of passage to allow the person concerned to proceed from the one opening to the other, wherein each door wing comprises a detection aerial, means being provided for switching on and off each aerial in turn, such that when the revolving door is not rotating only the detection aerial of that particular door wing is activated, which, seen in the direction of passage, is in front of the person who wishes either to enter or leave the protected room.
Dependencies are inferred from the claim text.