Keyless entry system for replacement of existing key locks

A keyless entry system for use with a deadbolt latch mechanism mounted on a door, the door having an exterior and an interior, the latch mechanism having an arm having a slot for engaging and disengaging an associated deadbolt, the keyless entry system comprising:

• an interior portion comprising:
• a housing mounted on the interior of the door, the housing having a base plate, the base plate having a first opening aligned with the slot;
• a camlock having a ratchet rotatably mounted on the base plate, the camlock having a second opening aligned with the first opening and the slot;
• a solenoid having a slug mounted on the base plate, the slug having a retracted position and an extended position, the slug engaging the ratchet in the extended position to prevent rotation of the camlock;
• electronic control means mounted on the base plate, the electronic control means being in electrical communication with the solenoid, the electronic control means moving the solenoid slug from an extended position to a retracted position and vice versa in response to entry of a coded sequence;
• and exterior portion comprising:
• a keypad in electrical communication with the electronic control means for manual entry of the coded sequence, the keypad being mounted on the exterior of the door;
• and
• a drive arm extending through the first and second openings, the drive arm rotating with the camlock, the drive arm extending through the slot of the latch mechanism, the drive arm being connected to a linkage, the linkage comprising a strip of high memory spring steel having one end mounted to the drive arm while the other end engages a rotary ring mounted on the exterior of the door, the drive arm being rotable by the linkage when the slug is in the retracted position.