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Door lock control system featuring a remote control for a pneumatically powered door lock mechanism

  • US 5,003,800 A
  • Filed: 07/17/1989
  • Issued: 04/02/1991
  • Est. Priority Date: 07/17/1989
  • Status: Expired due to Fees
First Claim
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1. A control system for remotely controlling a bolt in a door locking system from the unlock, slamlock, and deadlock positions while still allowing local operation of said bolt, the control system comprising:

  • (a) a door and a door frame adapted for closing or opening by rotating on a hinge supporting said door;

    (b) remote control means connected to said bolt for controlling operation of said bolt at a remote location relative to said door locking system, said bolt being controlled between said unlock, slamlock, and deadlock positions;

    (c) local control means connected to said bolt for controlling operation of said bolt at a local location relative to said door and door frame, said bolt being movable in said door locking system;

    (d) door position switch means connected to said door for determining movement of said door with respect to said door frame, said door position switch means generating a door closed signal when said door is closed and feeding said door closed signal to said remote control means;

    (e) bolt position means adjacent to said bolt for determining movement of said bolt into said deadlock position and generating a bolt position signal responsive thereto;

    (f) powered means connected to said bolt and operated by said remote control means for retracting and extending said bolt, said powered means having(i) said deadlock position of said bolt,(ii) said slamlock position of said bolt, and(iii) said unlock position of said bolt; and

    (g) said powered means further comprising(i) a double acting pneumatically powered piston rod in a cylinder,(ii) a first solenoid valve delivering air to a first side of said piston rod, and(iii) a second solenoid valve delivering air to a second side of said piston rod.

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