Abstract: An elevator door interlock includes a position indicator mounted at each landing, an elongate vane pivotally mounted in a fixed position with respect to the car door for movement between a first position, preferably several degrees rotated from perpendicular, and a second position, preferably generally perpendicular to the door surface, a swing latch including a latch arm secured at one end to the vane, preferably extending generally perpendicular to the vane, a contact plate secured to the end of the swing latch opposite the vane end, and a stop plate mounted in a fixed position with respect to the elevator car. The vane is preferably mounted on a spring-biased hinge, and is normally biased towards the first position such that the contact plate extends into the plane of the stop plate and contacts the stop plate to prevent further opening of the elevator door more than a limited distance when the door is opened unless the elevator car door is moved into a safe landing position within the hoistway.

Abstract: An elevator car door operator includes a drive motor, a drive pulley mounted for rotation by the drive motor, a continuous loop drive belt mounted on the drive pulley at one end of the belt and on an idler pulley at the other end of the belt, a drive bar connected to the drive belt and slidably mounted on a bar guide for translational movement across the elevator car door header. One or more doors are slidably mounted on guide tracks for movement between open and closed positions. One of the doors is either connected directly to the drive bar, or connected to a two-to-one relating cable mounted on the drive bar, so that the motion of the drive bar is transmitted to that door, thereby slidably positioning the door as the drive bar is slidably positioned by the belt along the length of the bar guide.

Abstract: An elevator car door restraint includes a position indicator mounted at the access points at each of the floors, a locking arm pivotally mounted between its ends on a first portion of the car for movement of the first end of the locking arm between an engaged and disengaged position, and for contact by the second end of the locking arm with one of the position indicators. A lock plate mounted on the second portion of the car which moves relative to the first portion of the car when the car door moves includes a contact face which is engageable with the first end of the locking arm when the first end is moved to the engaged position to mechanically restrain the elevator car door from opening. The locking arm is biased by a spring so that the first end of the arm is rotated into engagement position unless the first end is permitted from such rotation by contact of the second end with a position indicator. An integral hoistway interlock for center-parting the hoistway access doors is also provided.