Abstract: An upward acting door, such as a flexible curtain rollup door, is moveable between open and closed positions by an electric motor drive unit wherein the motor has a drive shaft with an external drive tang for engagement with a hand crank member. The crank member is adapted for mounting on a wall bracket and in engagement with a switch connected to a motor control unit. When the crank member is removed from its bracket, the switch causes the motor control unit to prevent transmission of electrical power to the motor. A manually disengageable brake is associated with the motor drive unit and is connected via an actuating member to a foot pedal which may be operated by a person using the crank member to disengage the brake and to allow free rotation of the motor drive shaft.

Abstract: A flexible curtain rollup door includes a drum mounted on a door frame and drivenly connected to an electric right angle gear motor unit. The frame includes opposed channel shaped guide tracks for receiving opposed side edges of a door curtain. Spaced apart elastically deflectable combination curtain stiffening struts and windlock members are secured to the curtain and include opposed windlock parts receivable in the guide tracks and configured, respectively, to provide for releasing only one side edge of the curtain from its guide track. A flexible transverse bottom bar includes plural side by side flexible bags filled with particulate material, secured to the curtain bottom edge and enclosed by a flexible envelope member. The curtain bottom edge includes a stiffener formed of interconnected links.

Abstract: A flexible curtain rollup door includes a drum mounted on a door frame and drivenly connected to an electric right angle gear motor unit. The frame includes opposed channel shaped guide tracks for receiving opposed side edges of a door curtain. Spaced apart elastically deflectable combination curtain stiffening struts and windlock members are secured to the curtain and include opposed windlock parts receivable in the guide tracks and configured, respectively, to provide for releasing only one side edge of the curtain from its guide track. A flexible transverse bottom bar includes plural side by side flexible bags filled with particulate material, secured to the curtain bottom edge and enclosed by a flexible envelope member. The curtain bottom edge includes a stiffener formed of interconnected links.

Abstract: A flexible curtain rollup door includes a drum mounted on a door frame and drivenly connected to an electric right angle gear motor unit. The frame includes opposed channel shaped guide tracks for receiving opposed side edges of a door curtain. Spaced apart elastically deflectable combination curtain stiffening struts and windlock members are secured to the curtain and include opposed windlock parts receivable in the guide tracks and configured, respectively, to provide for releasing only one side edge of the curtain from its guide track. A flexible transverse bottom bar includes plural side by side flexible bags filled with particulate material, secured to the curtain bottom edge and enclosed by a flexible envelope member. The curtain bottom edge includes a stiffener formed of interconnected links.

Abstract: A flexible curtain rollup door includes a drum mounted on a door frame and drivenly connected to an electric right angle gear motor unit. The frame includes opposed channel shaped guide tracks for receiving opposed side edges of a door curtain. Spaced apart elastically deflectable combination curtain stiffening struts and windlock members are secured to the curtain and include opposed windlock parts receivable in the guide tracks and configured, respectively, to provide for releasing only one side edge of the curtain from its guide track. A flexible transverse bottom bar includes plural side by side flexible bags filled with particulate material, secured to the curtain bottom edge and enclosed by a flexible envelope member. The curtain bottom edge includes a stiffener formed of interconnected links.

Abstract: A flexible curtain rollup door includes a drum mounted on a door frame and drivenly connected to an electric right angle gear motor unit. The frame includes opposed channel shaped guide tracks for receiving opposed side edges of a door curtain. Spaced apart elastically deflectable combination curtain stiffening struts and windlock members are secured to the curtain and include opposed windlock parts receivable in the guide tracks and configured, respectively, to provide for releasing only one side edge of the curtain from its guide track. A flexible transverse bottom bar includes plural side by side flexible bags filled with particulate material, secured to the curtain bottom edge and enclosed by a flexible envelope member. The curtain bottom edge includes a stiffener formed of interconnected links.

Abstract: A tandem windbar system for a flexible curtain rollup door includes a first windbar adapted to be guided in opposed guide channels of a door assembly and supported by flexible strap members which are secured at one end to a rotatable drum for rolling a flexible curtain closure member onto and off of the drum to open and close the door. Opposite ends of the strap members are secured to stationary structure, such as the upper ends of opposed guide channels for the door curtain and the first windbar. A second windbar is supported below the first windbar by opposed flexible straps which are operably connected at one end to the first windbar by a bearing tube member which may rotate relative to and is supported on the first windbar. The straps of the second set are trained around and support the second windbar and are connected at their opposite ends to the curtain drum for rolling onto and off of the drum. The second windbar ascends and descends at 1.

Abstract: An adjustable fence assembly includes a planar fence secured with a handle having an arcuate body portion which is rotatably coupled through an arcuate trolley member with an arcuate body portion of a fence traveler. The fence is directly pivotally coupled along its lower edge to the traveler along an axis of rotation which lies generally along the lower surface of the traveler. The lower traveler surface is supported on an upper surface of a fence track, which can be adjustably mounted to the rear cover of a conventional jointer-planer. Each arcuate body portion is about 45.degree. or less in arcuate extent with respect to the pivot axis to permit the portions to collapse and the fence to be rotated from an upright position to at least a 45.degree. position away from the jointer-planer. The angular position of the fence is selectably adjustable through the use of a single threaded fastener.