Abstract: A combination door operator assembly and door, wherein the door operator assembly includes an operator unit mounted to the door on the pushing side thereof, an arm linkage having a driving arm and a driven arm, a mounting bracket on the frame of the door, a rechargeable power storage pack having at least one of a rechargeable battery and one or more capacitors, and a controller for monitoring a speed and a position of the door, wherein when the door moves faster than a predetermined speed, the motor is used as a generator to charge the rechargeable power storage pack and the speed of the door is reduced.

Abstract: An improved delivery box assembly for a merchandising machine in which a door biased by gravity to a position at which it closes the delivery box opening is adapted to be pushed inwardly to rotate a pair of cranks carrying pins which ride in slots formed in crank arms carried by baffle pivots to rotate the baffle to a position at which it prevents access to the merchandise storage units of the machine before the door has been opened to an appreciable degree. An anti-jam flap prevents an article which is delivered while the door is open from falling into a pocket formed by the pivoted baffle and a stationary baffle thus to prevent jamming of the mechanism as the parts return to their initial position.

Abstract: Operating mechanism for doorway closures of the rollably suspended overlapping and interdependently laterally moving two panels type. The operating mechanism comprises a transversely extending shaft which is powerably turnable in both angular directions and which is laterally co-movably mounted to the slower near-panel. There is a dual-arms lever which at its medial turning-point is co-turnably attached to the transverse shaft and is laterally co-movable with the near-panel. A far-link has its ends respectively pivotably attached at a lofty elevation of the far-panel and to the lever second-arm a judicious finite-distance from the turnable shaft, and a near-link has its ends respectively pivotably attached to the lever first-arm and at a lofty immovable-location of the doorway nearward framework.