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.
Claims6
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, said latching means comprising stop means on said another portion of said vehicle and locking means on said door movable therewith and engagable with and disengagable from said stop means;
- 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, said control means comprising operating means mounted on said door and movable toward and away from said door, said operating means being connected to said locking means for preventing said locking means from engaging said stop means when said operating means is in a first position near said door and for permitting said locking means to engage said stop means when said operating means is in a second position farther from said door;
- and
- further means at each of said points for preventing said operating means from moving into its said second position when said vehicle is at a point.
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, 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 from 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 mounted on said door and movable toward and away from said door, said operating being being connected to said lastmentioned one of said stop means and said locking means for preventing interengagement of said locking means and said stop means when said operating means is in a first position near said car door and for permitting interengagement of said locking means and said stop means when said operating means is in a second position farther from said car door, and means at each of said floors engageable with said operating means when said car is within said predetermined distance from said floor for preventing said operating means from moving into its said second position when said car is within said predetermined distance from said floor.
Dependencies are inferred from the claim text.