Inventio Ag

Richard H Pilsbury

Karl B Orndorff

Arnold M Morris

Lawson Randall S

J Warren Barkell, Jr

Daphne D'Zurko

A device for opening and closing a shaft door of an elevator and a method of use thereof. The device includes a first coupling member adapted to be positioned on the shaft door and a second coupling member being adapted to be positioned on a car door on an elevator car. The first coupling member and the second coupling member cooperate with each other to couple the shaft door to the car door for movement therewith when the car is at a landing, the first coupling member cooperating with the second coupling member without contact between the first coupling member and the second coupling member. By means of the foregoing arrangement, noises and vibrations, which arise from the opening and unlatching of a shaft door entrained by a driven car door, can largely be avoided. The first and second coupling member are preferably magnets, which are arranged in such a manner that a north pole of the first coupling member lies opposite a north pole of the second coupling member and a south pole of the first coupling member lies opposite a south pole of the second coupling member. The like poles repel each other and are thereby separated by an air gap. A further magnet, one pole of which in the direction of movement of the doors lies opposite with an air gap to a like pole of the second coupling member, is provided on a latching member of the shaft door. When a car stops at a landing, the shaft door is first unlatched without contact and then is entrained by the car door without contact upon the opening of the car door due to the repelling forces of the magnets.

Device and method for the actuating and unlatching of the shaft doors of

A runner guide for an elevator door includes a ramp member at an end of travel position along a guide rail for engaging a roller attached to the door and running on the guide rail. The roller has a rim disc which engages a surface on the ramp member to move an insert in the roller out of engagement with the rail thereby relieving the load on and preventing flattening of the running surface on the insert when the door is at rest. The insert is formed of a non-metallic and hard elastic material to reduce running noise. The door is supported by a pair of such rollers, each having a pair of rim discs, and one roller is asymmetric with one of the rim discs being of a smaller diameter to move past the ramp member associated with the other roller without contact during opening and closing of the door.

Runner guide for a sliding elevator door

An elevator car having a clutch pivotally carried by a car door and biased to an operative position in which drive rollers of an adjacent hatch door may be engaged by 'open' and 'close' vanes. A first parallelogram linkage operates the close vane in direct response to car door position, in a direction opposite to initial car door opening movement. A second parallelogram linkage, associated with the open vane, is operated when the open vane contacts a hatch door roller at the start of door opening, to unlock the car door by retracting a plunger from an opening in the car door sill. The car door clutch bias may be manually overcome by authorized maintenance personnel, to disengage the car door from a hatch door.

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Demarest, NJ, United States of America

Richard H Pilsbury