Self-contained electromechanical locking device

An improved door lockset of the type having an inside knob and an outside knob connected by a lock body mounted through the door, said lock body having a locking bolt and a rotating member for unlocking said lock bolt, said improved lockset including:

• (a) a self-contained power source mounted within the outside knob;
• (b) a key actuated cylinder mounted within said outside knob connected to the rotating member for unlocking said lock bolt upon turning the cylinder with a key;
• (c) code generating means mounted on the outside knob for generating a coded signal in response to manual operation of said code generating means;
• (d) memory means mounted within the outside knob and connected to the power source for generating a control signal in response to receiving a valid coded signal from the code generating means;
• and
• (e) interlock means operable in response to the control signal permitting turning of the cylinder by the key to unlock the lock bolt.

An electromechanical locking device completely contained within a doorknob of the type adapted to be fitted on an input shaft of a key actuated lockset, said device including

• (a) a computer;
• (b) a motor controlled by said computer;
• (c) battery means for supplying power to the computer and motor;
• (d) a keypad connected to the computer for entering a code in the computer;
• (e) a key actuated mechanically operated lock cylinder;
• and
• (f) interlock means between the motor and lock cylinder for permitting operation of the mechanically operated lock cylinder by the key upon the computer receiving a proper code from the keypad.

A locking device completely contained within a doorknob of the type adapted to be fitted on an input shaft of a mechanically actuated lockset having a locking cylinder, said device including:

• (a) a self-contained power source;
• (b) a mechanical actuated turnkey slideably rotably mounted within the locking cylinder for rotating the locking cylinder from locked to unlocked position;
• (c) first means for generating a first signal in response to an entered code;
• (d) second means for generating a second signal in response to the first signal;
• (e) interlock means operable in response to the second signal for permitting manual movement of the mechanical actuated turnkey for rotating the cylinder to the unlocked position;
• and
• (f) switch means actuated upon inward movement of the turnkey for generating a third signal enabling the generation of the first and second signals.

An electronically operated locking device completely contained within a doorknob of the type adapted to be fitted on an input shaft of a lockset, said device including

• (a) a computer;
• (b) a motor controlled by said computer;
• (c) battery means for supplying power to the computer and motor;
• (d) a keypad connected to the computer for entering a code in the computer;
• (e) a mechanically operated lock cylinder;
• and
• (f) interlock means between the motor and lock cylinder for permitting manual operation of the mechanically operated lock cylinder upon the computer receiving a proper code from the keypad.

A electronically operated locking device completely contained within a doorknob of the type adapted to be fitted on an input shaft of a lockset, said device including:

• (a) electronic logic means;
• (b) a motor controlled by said electronic logic means;
• (c) a self contained power source;
• (d) code entry means for entering a code into said electronic logic means;
• (e) mechanical means for manually operating the input shaft of a lockset;
• and
• (f) interlock means cooperating with the motor and mechanical means for permitting manual operation of the mechanical means upon the electronic logic means receiving a proper code from the code entry means.