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Pawl & solenoid locking mechanism

  • US 5,887,467 A
  • Filed: 07/10/1997
  • Issued: 03/30/1999
  • Est. Priority Date: 03/30/1994
  • Status: Expired due to Term
First Claim
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1. A combination lock, comprising:

  • a base plate having a rotatable cam member and a plurality of spaced apart detent hole members aligned along a common axis;

    a bolt plate mounted slidably to said base plate for moving along a rectilinear path of travel substantially parallel to said common axis to block and unblock an entranceway in response to said cam member being rotated;

    a rotatable electronic keypad coupled mechanically to said rotatable cam member for rotating said rotatable cam member about a common rotational axis with said keypad;

    said rotatable electronic keypad having a plurality of pushbuttons for the entry of a sequence indicative of a correct combination code to facilitate the movement of said bolt plate from a blocking entranceway state to an unblocking entranceway state;

    a lockable pawl member mounted to said bolt plate for engaging an individual one of said plurality of detent hole members to substantially prevent said bolt plate from moving along said rectilinear path of travel when said detent member is in a locked state;

    said lockable pawl member having a detent groove to facilitate locking said pawl member in a fixed position;

    a solenoid having a solenoid pin for engraving said detent groove to secure said pawl member in a locking engagement with an individual one of said plurality of detent holes to effectively prevent said bolt plate from traversing from entranceway blocking and unblocking states; and

    said solenoid being coupled electrically to said rotatable electronic keyboard and being responsive to said correct combination code for retracting said solenoid pin from said locking engagement to permit said bolt plate to move along said rectilinear path of travel in response to said electronic keypad being rotated about said common rotational axis.

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