Abstract:
A door controlling device for opening and closing a door in a wall has a first arm, one end of which is mounted to the wall and the other end of which is pivotally attached to the second end of a second arm. The first end of the second arm is pivotally attached to the top of a door and is adapted for rotation about a horizontal axis at the first end thereof. An electric motor attached to the device has a shaft which drives a gear train, and an output shaft of the gear train is connected to the input end of an electrically operated clutch. The output shaft of the clutch is connected to the first end of one of the arms such that upon the simultaneous engagement of the clutch and the energizing of the motor, that arm will be rotated about the horizontal axis at the first end and will cause the door to be opened or closed. Also, a current measuring device for determining whether the motor is drawing on excessive amount of electric current, a door open sensor for generating a signal when the door is in a fully opened position, and a door closed sensor for generating a signal when the door is in a fully closed position are all connected to a computer to control the opening and closing of a door.
Abstract:
A door controlling device for opening and closing a door in a wall having a linkage connecting between the door and a wall and an arm pivotable about a pin. A drive member on the pin has a stand by position which does not interfere with the manual movement of the door. Rotation of the drive member in one direction rotates the arm around the pin to move the door to the open position and rotation of the drive member in the opposite direction rotates the arm around the pin to move the door to the closed position.
Abstract:
An assist for use with a motorized door operating device to assist in the opening of a door during its movement from the closed position to an ajar position, and to assist in the closing of the door during its movement from the ajar position to the closed position. The device includes a connector mounted on one of the door and the wall and a motorized catch on the other of the door and wall for engaging and releasing the connector. During a door closing cycle, the assist remains inactive until the catch engages the connector, after which the motorized catch is moved in a first direction to move the door from the ajar position to the closed position. Upon the commencement of a door opening cycle, and upon completion of any unlatching cycle whereby any door latch retaining the door is released, the catch is moved in a second direction for moving the door from the closed position to the ajar position. Once the door is in the ajar position, the catch is disengaged from the connector and the door is allowed to move through the remainder of the door opening cycle without interference from the assist.
Abstract:
A door controlling device for opening and closing a door in a wall has a first arm, one end of which is mounted to the wall and the other end of which is pivotally attached to the second end of a second arm. The first end of the second arm is pivotally attached to the top of a door and is adapted for rotation about a horizontal axis at the first end thereof. An electric motor attached to the device has a shaft which drives a gear train, and an output shaft of the gear train is connected to the input end of an electrically operated clutch. The output shaft of the clutch is connected to the first end of one of the arms such that upon the simultaneous engagement of the clutch and the energizing of the motor, that arm will be rotated about the horizontal axis at the first end and will cause the door to be opened or closed. Also, a current measuring device for determining whether the motor is drawing on excessive amount of electric current, a door open sensor for generating a signal when the door is in a fully opened position, and a door closed sensor for generating a signal when the door is in a fully closed position are all connected to a computer to control the opening and closing of a door.
Abstract:
A picket fence assembly having upper and lower rails each with a plurality of non-circular holes receiving a plurality of vertical pickets through respective aligned holes and with the pickets having transverse through-holes in alignment and receiving a rigid transverse rod preventing rotations of the pickets.
Abstract:
A device is provided for unlatching a door which is latched into a door frame where the door latch assembly includes an elongate lever arm rotatable about an axis from a first latched orientation to second unlatched orientation. The device includes a cable having a first end attachable to the distal end of the lever arm and a second end attached to a take up spool. The take up spool is rotated by a motor in a first direction to take up the cable and thereby draw the lever arm from the first latched orientation to the second unlatched orientation and thereafter rotate in the second direction to release the cable and allow the lever arm to return from the second unlatched orientation to the first latched orientation.
Abstract:
A door controlling device for opening and closing a door in a wall has a first arm, one end of which is mounted to the wall and the other end of which is pivotally attached to the second end of a second arm. The first end of the second arm is pivotally attached to the top of a door and is adapted for rotation about a horizontal axis at the first end thereof. An electric motor attached to the device has a shaft which drives a gear train, and an output shaft of the gear train is connected to the input end of an electrically operated clutch. The output shaft of the clutch is connected to the first end of one of the arms such that upon the simultaneous engagement of the clutch and the energizing of the motor, that arm will be rotated about the horizontal axis at the first end and will cause the door to be opened or closed. Also, a current measuring device for determining whether the motor is drawing on excessive amount of electric current, a door open sensor for generating a signal when the door is in a fully opened position, and a door closed sensor for generating a signal when the door is in a fully closed position are all connected to a computer to control the opening and closing of a door.