Duplex door safety recycling system
OwnerFloyd L. Foreman, Emmet D. Fentoninventors
Life of this patent
Estimating the term…
Abstract
A duplex door safety recycling system, primarily for elevator doors, that includes a clutch mounted safety switch for activating an electrical control circuit to recycle and open the duplex doors when an external force is applied to a clutch-driven door in opposition to the force moving the door in the direction of closing.
Claims7
A method for activating an electrical safety control circuit in an automatically operated electric motor driven duplex door system having a first clutch member mounted on a clutch-driven door that is mounted to a building structure for lateral movement to close and open an elevator hoistway opening of the building structure and a second clutch member mounted on a motor-driven door that is mounted to a vertical movement elevator car structure for lateral movement to close and open an entrance-exit opening of the elevator car structure, where lateral movement of the motor-driven door when vertically aligned with the clutch-driven door causes simultaneous lateral movement of the clutch-driven door through engagement of the first clutch member by the second clutch member, comprising:
- (a) exerting a force against a surface of the clutch-driven door opposing a closing force exerted against the first clutch member by the second clutch member with the clutch members engaged and the doors closing;
- (b) flexing thereby a resilient body member in an electric circuit switch means interposed between the clutch members at the point of engagement of the clutch members, attached to the second clutch member and electrically wired to the safety control circuit;
- (c) moving thereby a switch means contact element, positioned within the switch means for movement in unison with the resilient body member, to actuate the switch means.
A method for recycling clutch-connected duplex doors from a doors closing cycle to a doors opening cylce comprising:
- (a) affixing to a first clutch member mounted on a clutch-driven first door of a duplex doors system an electric current switch means in a position for transmission of all forces between said first clutch member and a second clutch member mounted on a clutch-driving second door of said duplex doors system during a doors closing cycle of said duplex doors system through a body of said electric current switch means:
- (b) providing in said body for actuating said electric current switch means as a result of a closing force being transmitted through said body being increased by a force applied externally on said first door resisting the closing force;
- (c) activating thereby as a result of so actuating the switch means an electrical control circuit electrically connected to said switch means and to an electric motor driving the clutch-driving second door in the doors closing cycle;
- and
- (d) reversing thereby a rotational direction of said causing the motor to drive the clutch-driving second door in a doors opening cycle.
In an elevator door safety system including, a driving door mounted on an elevator car structure for lateral movement across a doorway of said car structure, a driven door mounted on a building structure for lateral movement across an elevator hoistway doorway of the building structure, a clutch means connecting the driving door and the driven door during a door opening cycle and during a door closing cycle, an electric motor means connected by a power transmission means to the driving door and an electric motor control circuit means electrically connected to an electric current source and to said electric motor means, the improvement comprising:
- a duplex door recycling switch mounted on a driving clutch member that is attached to the driving door;
- the switch positioned for contact with a driven clutch member that is attached to the driven door so that during the door closing cycle a closing force transmitted between the driving clutch member and the driven clutch member must pass through a body of the switch;
- the body having a flexible body member deflectable by externally applied force;
- an electric curcuit contact make and break means positioned for actuation by deflection of said flexible body member in response to an increase in the closing force caused by an external resistant force on the driven door;
- and a circuit means for conducting an electric current through said circuit contact make and break means and on through said switch body to the electric motor control circuit means.
An elevator door recycling clutch member comprising a clutch member means and a recycling safety control switch means affixed to the clutch member means so that said switch means forms an engagement surface means and contacts a mating second clutch member means during a clutched engagement of the clutch member means and the second clutch member means with the clutch member means being mounted on a laterally movable door means of an elevator car means and the second clutch member means being mounted on a laterally movable door means of an elevator hoistway means in a building structure and the door means of the hoistway means being propelled in a hoistway doorway closing direction of the door means of the elevator car through the clutched engagement, having in said switch means electric circuit contact make and break means operable by a force externally applied to said switch through sid second clutch member means and adding to a force present on said switch means as a result of the clutch engagement with the door means of the building structure being driven by an electric motor means mounted on the elevator car means, and having electric circuit means connected to said electric circuit make and break means and to an electric motor control means controlling an electric current supply to said electric motor.
Dependencies are inferred from the claim text.