Vehicle door lock for limiting door opening to specified vehicle positions
AssigneeG.A.L. Manufacturing Company, LLC
InventorsWalter Glaser, Herbert P. Glaser
Life of this patent
Estimating the term…
Abstract
A locking mechanism, for the doors of an elevator car, which is disabled when the car is within a short distance from a landing but which otherwise permits the doors to be opened by an amount insufficient for a passenger to exit from the car and then locks the doors with respect to further opening movement. In the preferred form, a door carries a notched plate, and a latch bolt on a part of the car which is stationary relative to the door is controlled by an arm engageable with spaced cams in the hoistway so that the bolt will enter the notch of the plate when the car is away from a landing and the doors are partially opened.
Claims26
In a passenger transportation system in which a passenger carrying vehicle moves along a selected path and stops at predetermined points to permit passengers to exit from said vehicle, said vehicle having a door thereon which travels therewith and which opens to permit the exiting of passengers from the vehicle, the combination therewith of:
- latching means carried by said vehicle and acting between the door and another portion of the vehicle for permitting opening of said door by a predetermined amount less than the amount required for a passenger to exit from the vehicle and for preventing opening of said door by more than said predetermined amount;
- and
- control means which is responsive to the position of said vehicle, which is connected to said latching means and which disables said latching means when said vehicle is within a predetermined distance from a said point and thereby permits said vehicle door to open more than said predetermined amount when said vehicle is within a predetermined distance from a said point, said distance being small relative to the distances between said points.
Apparatus adapted to be installed in an elevator system comprising an elevator car mounted for movement in a hoistway between a plurality of floors, said car having a door thereon which moves therewith and which opens to permit the exiting of passengers at each of said floors, said apparatus comprising a shaft, an arm which can be secured to said shaft for pivoting the latter, a notched plate, a lock bolt, means for rotatably mounting said shaft on a portion of said car other than said door and in a position such that, with said arm thereon, said arm is outwardly of said car, means for mounting said plate on one of said door and said shaft, means for mounting said lock bolt on the other of said door and said shaft in a position to engage said plate, and cam means mountable on said hoistway at a floor for engagement with said arm and thereby limiting rotation of said shaft.
In an elevator system which comprises an elevator car which is mounted for movement in a hoistway between a plurality of floors, said car having a door thereon which travels therewith and which opens to permit passengers to exit from the car, electrically operable means for moving said car between floors and for opening and closing said door and an electric power supply for supplying electrical power to said electrically operable means, the combination therewith of:
- latching means carried by said car and acting between said door and another portion of said vehicle for preventing opening of said door by more than a predetermined amount, said latching means being operated by movement of said door toward the open position and being operable even in the event of failure of said power supply;
- and
- control means responsive to the position of said car and connected to said latching means for preventing and latching means from preventing opening of said door when said car is within a predetermined distance of a floor, said distance being small relative to the distance between said floors, and said control means being operable even in the event of failure of said power supply.
In an elevator system which comprises an elevator car which is mounted for movement in a hoistway between a plurality of floors, said car having a door therein which travels therewith and which opens to permit passengers to exit from the car, the combination therewith of:
- latching means carried by said car and acting between said door and another portion of the vehicle for preventing opening of said door by an amount sufficient to permit a passenger to exit from the car, said latching means comprising interengageable stop means and locking means, one of said stop means and said locking means being mounted on said door and the other of said stop means and said locking means being mounted on another portion of said car;
- and
- control means which is responsive to the position of said car and which is connected to one of said stop means and said locking means for preventing interengagement thereof when said car is within a predetermined distance of a said floor to thereby permit said door to open by an amount sufficient to permit a passenger to exit from the car, said control means comprising operating means on said car and connected to said last-mentioned one of said stop means and said locking means and means at each of said floors engageable with said operating means when said car is within said predetermined distance of said floor and said door moves toward its open position for positioning said last-mentioned one of said stop means and said locking means so that said stop means and said locking means cannot interengage as the door opens.
Dependencies are inferred from the claim text.