Swinging elevator hatchway door interlock
AssigneeThyssen Elevator Capital Corp.
InventorPatrick M. Bass
Life of this patent
Estimating the term…
Abstract
An electromechanical interlock for a swinging elevator door is disclosed. The interlock comprises a pivotal hook member that may be attached to a swinging elevator door. The hook has a beak end and may pivot between a locked and an unlocked position. Disposed on the beak end is an electrical conductor. When the interlock is in the locked position, the beak end engages a lug and the conductor contacts electrical contacts to complete an electrical circuit. A solenoid pivots the hook from a locked position to an unlocked position. The electromechanical interlock may be adapted for use with sliding elevator doors as well as swinging doors.
Claims17
A elevator hatchway door interlock for a swinging elevator hatchway door that swings between an opened and closed position, the interlock comprising:
- a pivotal hook biased to rotate from an unlocked position to a locked position, the pivotal hook having a beak end and a fulcrum end, the beak end having an electrical conductor disposed thereon,
- a mounting plate for being mounted in an elevator hoistway, the mounting plate having:
- (i) a lug having an inclined surface for slidably engaging the beak end when the door swings from the open position to the closed position, the lug also having a locking surface for engaging the beak end when the door is in the closed position and the hook is in the locked position, thereby preventing the door from being opened;
- (ii) a contact assembly having electrical contacts disposed thereon that engage the electrical conductor when the hook is in the locked position and the door is in the closed position, thereby closing an electrical circuit only when the hook is in the locked position;
- and
- (iii) a solenoid having an extendable pin for engaging the hook, the solenoid having a retracted position wherein the extendable pin is retracted, the solenoid having an extended position wherein the extendable pin is extended from the solenoid and engages the hook to pivot it to the unlocked position.
An electromechanically interlocked swinging elevator hatchway door comprising:
- a swinging door having an interior and exterior surface, the interior surface facing toward the hoistway and the exterior surface facing an opposite direction;
- a pivotal hook pivotally mounted on the interior surface of the hatchway door, the hook pivoting between a locked and unlocked position, the hook being biased toward the locked position, the hook also having a beak end, the beak end having an electrical conductor disposed thereon;
- a lug for being mounted in an elevator hoistway, the lug having a locking surface for engaging the inboard surface;
- an electrical contact assembly for being mounted in the elevator hoistway, the electrical contact assembly having electrical contacts for engaging the electrical conductor;
- and
- a solenoid for being mounted in the elevator hoistway, the solenoid having an extendable pin that engages and pivots the hook to the unlocked position where the beak does not engage the lug.
An electromechanical interlock for a swinging elevator door that swings between an open position and a closed position, the interlock comprising:
- a pivotal hook having a beak end, the pivotal hook disposed on the swinging elevator door, the hook also being biased to pivot from a first position to a second position;
- an electrical conductor disposed on the beak end;
- a solenoid having an extendable pin that moves between a retracted and an extended position, when in the extended position the extendable pin contacting the hook to rotate the hook to the first position;
- a lug that contacts a portion of the beak end when the extendable pin is retracted;
- and
- an electrical contact that electrically engages the electrical conductor when the door is in the closed position and the extendable pin is retracted.
An interlocked elevator door assembly comprising:
- an elevator door;
- a pivotal hook disposed on the elevator door, the pivotal hook having a locked and unlocked position and having first and second surfaces, wherein the first surface is electrically conductive;
- an electrical contact that engages the first surface of the pivotal hook when the hook is in the locked position;
- a lug that engages the second surface of the pivotal hook when the hook is in the locked position;
- and
- a means for pivoting the hook to the unlocked position thereby causing the first surface to break contact with the electrical contact and causing the second surface to no longer engaging the locking lug.
Dependencies are inferred from the claim text.