Patents by Inventor Ernst K. Mitchell

Ernst K. Mitchell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10400477
    Abstract: An electronic deadbolt operator for a deadbolt lockset comprises an electronic actuator that rotates a powered driver and a follower that has a lost motion connection with the powered driver, enabling the follower to rotate with the powered driver when the follower is inside its range of travel, and enabling the powered driver to rotate freely of the follower after the follower is pushed to a travel limit. The follower is mounted to a connector driver, which drives the deadbolt, to toggle between two oppositely-disposed off-center positions relative to the connector driver. In one off-center position, only clockwise rotation of the powered driver is operative to rotate the follower. In the opposite position, only counterclockwise rotation of the powered driver is operative to rotate the follower. The interaction between the powered driver, the follower, and stops causes the follower to toggle to an opposite position after hitting a stop.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: September 3, 2019
    Assignee: Townsteel, Inc.
    Inventors: Charles W. Moon, Ernst K. Mitchell, Sybor Ma
  • Publication number: 20170122007
    Abstract: An electronic deadbolt operator for a deadbolt lockset comprises an electronic actuator that rotates a powered driver and a follower that has a lost motion connection with the powered driver, enabling the follower to rotate with the powered driver when the follower is inside its range of travel, and enabling the powered driver to rotate freely of the follower after the follower is pushed to a travel limit. The follower is mounted to a connector driver, which drives the deadbolt, to toggle between two oppositely-disposed off-center positions relative to the connector driver. In one off-center position, only clockwise rotation of the powered driver is operative to rotate the follower. In the opposite position, only counterclockwise rotation of the powered driver is operative to rotate the follower. The interaction between the powered driver, the follower, and stops causes the follower to toggle to an opposite position after hitting a stop.
    Type: Application
    Filed: February 16, 2016
    Publication date: May 4, 2017
    Inventors: CHARLES W. MOON, ERNST K. MITCHELL, SYBOR MA
  • Patent number: 7051561
    Abstract: A mortise lockset apparatus (10) that includes a retractable bolt (20) movably supported within a case (12). A handle (18) is pivotally supported on a hub (16) supported in the case, the hub being operably connected to the retractable bolt. The bolt is retracted by turning the door handle. A lock-out mechanism (22) is configured to prevent the handle from being turned when the lock-out mechanism is in an engaged position. The handle lock-out mechanism also includes a cam (29) movably supported in the case and operably connected to a motor (30). A sliding stop (34) is movably supported in the case and is engageable with the handle hub to prevent the handle hub and the handle from turning. The sliding stop is also engageable with a cam surface (40) of the cam. The motor is configured to move the sliding stop by rotating the cam. The cam rotational axis (42) is disposed between diametrically opposed portions of the cam surface to minimize space requirements for the assembly.
    Type: Grant
    Filed: December 8, 2000
    Date of Patent: May 30, 2006
    Assignee: Computerized Security Systems, Inc.
    Inventors: Charles W. Moon, Ernst K. Mitchell, Mohamad A. Khalil, John J. Kimes
  • Publication number: 20040045330
    Abstract: A mortise lockset apparatus (10) that includes a retractable bolt (20) movably supported within a case (12). A handle (18) is pivotally supported on a hub (16) supported in the case, the hub being operably connected to the retractable bolt. The bolt is retracted by turning the door handle. A lock-out mechanism (22) is configured to prevent the handle from being turned when the lock-out mechanism is in an engaged position. The handle lock-out mechanism also includes a cam (29) movably supported in the case and operably connected to a motor (30). A sliding stop (34) is movably supported in the case and is engageable with the handle hub to prevent the handle hub and the handle from turning. The sliding stop is also engageable with a cam surface (40) of the cam. The motor is configured to move the sliding stop by rotating the cam. The cam rotational axis (42) is disposed between diametrically opposed portions of the cam surface to minimize space requirements for the assembly.
    Type: Application
    Filed: October 23, 2003
    Publication date: March 11, 2004
    Inventors: Charles W. Moon, Ernst K. Mitchell, Mohamad A. Khalil, John J. Kimes
  • Patent number: 4391204
    Abstract: A security cabinet with a coin operated key-lock has the entire locking system including the coin box and a tamper detector alarm mounted inside the cabinet door. The lock cylinder of the cabinet key-lock is mounted on the latch mechanism and accessable at the front panel of the door. The lock cylinder can be removed and replaced by use of a master key with the door in a locked condition. The key-lock has a cam for operating the latch bolt and a coin detector, also mounted in the door, includes a detaining lever for blocking movement of the latch bolt unless a valid coin is deposited. The coin box is also mounted in the door. A rear panel of the door can be opened for servicing of the latch mechanism, coin box and the tamper detector.
    Type: Grant
    Filed: September 9, 1980
    Date of Patent: July 5, 1983
    Assignee: Safekeeper Systems, Inc.
    Inventors: Ernst K. Mitchell, Richard H. Terry
  • Patent number: D519021
    Type: Grant
    Filed: May 4, 2004
    Date of Patent: April 18, 2006
    Assignee: Computerized Security Systems, Inc.
    Inventors: Dan Boulware, Ernst K. Mitchell, Charles W. Moon
  • Patent number: D533047
    Type: Grant
    Filed: August 12, 2005
    Date of Patent: December 5, 2006
    Assignee: Computerized Security Systems, Inc.
    Inventors: Michael J. Wright, Charles W. Moon, Ernst K. Mitchell, Dale Mathias
  • Patent number: D533762
    Type: Grant
    Filed: August 12, 2005
    Date of Patent: December 19, 2006
    Assignee: Computerized Security Systems, Inc.
    Inventors: Michael J. Wright, Charles W. Moon, Ernst K. Mitchell, Dale Mathias
  • Patent number: D533763
    Type: Grant
    Filed: August 12, 2005
    Date of Patent: December 19, 2006
    Assignee: Computerized Security Systems, Inc.
    Inventors: Michael J. Wright, Charles W. Moon, Ernst K. Mitchell, Dale Mathias
  • Patent number: D569221
    Type: Grant
    Filed: January 30, 2007
    Date of Patent: May 20, 2008
    Assignee: Computerized Security Systems, Inc.
    Inventors: Ernst K. Mitchell, Glenn L. Peacock
  • Patent number: D601877
    Type: Grant
    Filed: January 30, 2007
    Date of Patent: October 13, 2009
    Assignee: Computerized Security Systems, Inc.
    Inventors: Ernst K. Mitchell, Glenn L. Peacock