Abstract: A system and method of use relating to a hidden motorized system for use in windows that can reliability and consistently open and close the window via remote operation. Specifically, a motorized system is disposed inside a window in a manner without requiring unsightly modifications to the window. The motorized system can be controlled via wireless remote or wired remote switch. The entire system fits within a conventional window, such as a single or double hung window, in a manner that is hidden from view, thereby keeping the conventional ornamental look of the window.

Abstract: An elevator door mover device (40) includes a threaded ferromagnetic shaft (42). Magnetic movers (48) associated with doors (26) generate magnetic fields that cause the doors to move responsive to rotation of the shaft (42). In one example, a controller (46) controls a speed of a motor (44) that drives the shaft (42). The controller (46) in some examples also selectively controls the strength of the magnetic fields of the movers, which provides more customizable door performance.

Abstract: A control system for a motorized freight elevator landing door in which all of the doors in a single line of a hoistway are controlled with one set of proximity sensors carried on the elevator car. The sensors signal a controller that operates electric motors for opening and closing the landing door where the car has stopped. The door operating motors are two speed units and the sensors and controller are arranged to operate the motors at high speed during most of the travel in opening or closing movement and at reduced speed at the end of movement. The controller applies power to the motor for a short period after the door is fully closed or open to stall the motors and thereby dampen any rebound motion.