Electromechanical cylinder plug

A lock, comprising:

• a cylinder containing a hollow recess defining a longitudinal axis;
• a plug bearing a plurality of open radially oriented apertures forming an array, said plug being rotatable around said longitudinal axis while resident within said hollow recess, said plug comprising:
• a first base bearing a keyway providing a first electrical conductor and an orifice spaced-apart from and separated by a mass of said plug from said keyway;
• a second base separated by an axial length of said plug from said first base, said second base bearing means for supporting a cam;
• an exterior surface extending between and engaging said first base and said second base;
• a sidebar positioned between said first base and said second base to reciprocate between a first location with said sidebar simultaneously engaging said plug and said cylinder surrounding said plug, and a second location releasing said plug for rotation relative to the cylinder;
• a locking device disposed within said apertures to reciprocate relative to said cylinder in response to a key inserted into said keyway to accommodate reciprocation of said sidebar relative to said plug and relative to said cylinder when the key while inserted into said keyway engages in a selected relation with said locking device, and obstructing said reciprocation absent said selected relation;
• a second electrical conductor terminating with an electrical contact exposed to an exterior of said first base through said orifice;
• an electronic logic circuit borne by said plug, coupled to receive data signals through at least one of said first and second electrical conductors, and generating control signals in dependence upon said data signals;
• and
• an electrical operator borne by said plug, disposed within one of said apertures, said operator having a distal member radially traveling along an axis transverse to said longitudinal axis, in dependence upon said control signals between a first position relative to said exterior surface accommodating said reciprocation and a second and different position relative to said exterior surface obstructing said reciprocation in concert with said locking device.

A lock, comprising:

• a shell containing a hollow recess defining a longitudinal axis and an interior cylindrical surface;
• a plug rotatable around said longitudinal axis while resident within said hollow recess, and a bar interposed between said shell and said plug to reciprocate generally along a radial plane between a first position engaging both said shell and said plug while obstructing rotation of said plug within said recess, and a second position accommodating said rotation, said plug comprising:
• a first base bearing a keyway and providing a first electrical conductor and an orifice spaced-apart from and separated by a mass of said plug from said keyway;
• a second base separated by an axial length of said plug from said first base, said second base bearing means for supporting a cam;
• an exterior surface extending between and engaging said first base and said second base;
• a locking device responsive to a key inserted into said keyway to accommodate reciprocation of said bar between said first position and said second position when the key while inserted into said keyway engages in a selected relation with said locking device and obstructing said reciprocation absent said selected relation;
• a second electrical conductor terminating with an electrical contact exposed to an exterior of said first base through said orifice;
• an electronic logic circuit coupled to receive data signals through at least one of said first and second electrical conductors, and generating control signals in dependence upon said data signals;
• and
• an electrical operator having a distal member radially reciprocating along an axis transverse to said longitudinal axis, in dependence upon said control signals between a first orientation relative to said exterior surface enabling said reciprocation and a second and different orientation relative to said exterior surface obstructing said reciprocation.

A lock, comprising:

• a shell containing a hollow recess defining a longitudinal axis and an interior cylindrical surface;
• a cylinder plug rotatable around said longitudinal axis while resident within said hollow recess, said cylinder plug comprising:
• a first base and a second base separated by a mass and an axial length of said cylinder plug from said first base, said second base being configured to support a cam, said mass comprising a main body exhibiting a major exterior circumferential surface and a cylindrical sector exhibiting a lesser and minor exterior circumferential surface supplementing said main body to endow said cylinder plug with a substantially cylindrical exterior shape that is removably insertable within said hollow recess;
• an electrical operator encased within said cylindrical sector and rotatable with said cylinder plug, said electrical operator being electrically operable to respond to a control signal by moving between one of a first orientation obstructing rotation of said cylinder plug relative to said shell and a second and different orientation accommodating said rotation, and another of said first orientation and said second orientation;
• and
• a logic circuit encased within said cylindrical sector generating said control signal in response to a comparison between a code set within said logic circuit and a data signal applied to said logic circuit.

A lock, comprising:

• a shell containing a hollow recess defining a longitudinal axis and an interior cylindrical surface;
• a cylinder plug rotatable around said longitudinal axis while resident within said hollow recess, said cylinder plug comprising:
• a first base and a second base separated by a mass and an axial length of said cylinder plug from said first base, said second base bearing means for supporting a cam, said mass comprising a main body exhibiting a major exterior circumferential surface and a cylindrical sector forming a module exhibiting a lesser and minor exterior circumferential surface supplementing said main body to endow said cylinder plug with a substantially cylindrical exterior shape that is removably insertable within said hollow recess;
• and
• an electrical operator encased within and borne by said axial cylindrical sector, and rotatable with said cylinder plug, said electrical operator being electrically operable to respond to a control signal by moving between one of a first orientation causing obstruction of rotation of said cylinder plug within said shell and a second orientation accommodating said rotation, and another of said first orientation and said second orientation;
• a bar interposed between said shell and said cylinder plug, spaced-apart from said electrical operator and movable independently of said electrical operator between a first position obstructing said rotation and a second and different position accommodating said rotation.

An electromechanical lock cylinder, comprising:

• an outer shell having a bore formed therein and a cavity extending from the bore into the shell;
• a barrel disposed within the bore in the shell and being rotatable relative thereto;
• a side bar cooperating between the shell and the barrel for selectively permitting and blocking rotation of the barrel with respect to the shell, the side bar having a first portion engaging the barrel and a second portion removably received in the cavity in the shell, the side bar being movable relative to the barrel;
• at least one electromechanical locking member disposed within the barrel and positionable in a barrel blocking position blocking rotation of the barrel with respect to the shell, and also positionable in a non-barrel blocking position permitting the side bar to be moved relative to the cavity in the shell to rotate the barrel with respect to the shell;
• said side bar comprises a major elongate surface that defines a plane extending approximately radially relative to said barrel;
• said locking member moving on an axis that is approximately perpendicular to said plane;
• an electronically powered drive mechanism located within the barrel and cooperating with the electromechanical locking member to selectively move the locking member from the barrel blocking position to the non-barrel blocking position in which the side bar moves out of the cavity and engages the locking member;
• and
• control means for activating the electronically powered drive mechanism in response to an authorized attempt to operate the lock cylinder.

A rotatable lock barrel for insertion into a lock cylinder having a bore formed therein, the barrel comprising:

• an elongated, generally cylindrically shaped barrel member having an exterior configured for receipt in a bore of a lock cylinder and an interior containing an electromechanical locking member, the barrel member having a recess formed therein;
• a side bar that travels along a plane that extends approximately radially relative to said barrel;
• and
• said locking member moving on an axis that is approximately perpendicular to said plane;
• wherein the locking member is disposed in the recess of the barrel member and is substantially entirely contained within the barrel member, the locking member including a groove and the locking member being movable to a position in which the groove of the locking member is placed in an alignment;
• the recess in said barrel member being configured to receive at least a portion of a movable side bar of a lock cylinder to permit the side bar to move into and out of engagement with the groove of the locking member for selectively permitting and blocking rotation of the barrel member with respect to a lock cylinder when positioned therein;
• an electronically powered drive mechanism located within the barrel member for moving the electromechanical locking member to a position in which the groove of the locking member is in said alignment.

A plug, comprising:

• a first base bearing a keyway and providing a first electrical conductor and an orifice spaced-apart from and separated by a mass of said plug from said keyway;
• a second base separated by an axial length of said plug from said first base, said second base bearing means for supporting a cam, said mass being perforated by an aperture;
• an exterior surface extending between and engaging said first base and said second base;
• a detent positioned between said first base and said second base to reciprocate between a first location with said detent simultaneously engaging said plug and a cylinder surrounding said plug, and a second location releasing said plug for rotation relative to the cylinder;
• a locking element disposed within said aperture to reciprocate with said plug in response to a key inserted into said keyway to accommodate reciprocation of said detent relative to said plug and rotation of said plug relative to the cylinder when the key while inserted into said keyway engages in a selected relation with said locking element, and obstructing said reciprocation absent said selected relation;
• a second electrical conductor terminating with an electrical contact exposed to an exterior of said first base through said orifice;
• an electronic logic circuit borne by said plug while coupled to receive electrical power and data signals through at least one of said first and second electrical conductors, and generating control signals in dependence upon said data signals;
• and
• an electrical operator disposed within said aperture, said operator having a distal member traveling in dependence upon said control signals between a first position relative to said exterior surface accommodating said reciprocation and a second and different position relative to said exterior surface obstructing said reciprocation.

A process of re-fitting a lock, comprising the steps of:

• orienting a cylinder to serve as a lock;
• and
• installing within said cylinder, a plug comprised of:
• a first base bearing a keyway and providing a first electrical conductor and an orifice spaced-apart from and separated by a mass of said plug from said keyway;
• a second base separated by an axial length of said plug from said first base, said second base bearing means for supporting a cam, said mass being perforated by an aperture;
• an exterior surface extending between and engaging said first base and said second base;
• a detent positioned between said first base and said second base to reciprocate between a first location with said detent simultaneously engaging said plug and a cylinder surrounding said plug, and a second location releasing said plug for rotation relative to the cylinder;
• a locking element disposed within said aperture to reciprocate with said plug in response to a key inserted into said keyway to accommodate reciprocation of said detent relative to said plug and rotation of said plug relative to the cylinder when the key while inserted into said keyway engages in a selected relation with said locking element, and obstructing said reciprocation absent said selected relation;
• a second electrical conductor terminating with an electrical contact exposed to an exterior of said first base through said orifice;
• an electronic logic circuit borne by said plug while coupled to receive electrical power and data signals via said first and second electrical conductors, and generating control signals in dependence upon said electrical power and data signals;
• and
• an electrical operator disposed within said aperture, said operator having a distal member travelling in dependence upon said control signals between a first position relative to said exterior surface accommodating said reciprocation and a second and different position relative to said exterior surface obstructing said reciprocation.

A plug, comprising:

• a first base bearing a keyway and providing an orifice spaced-apart from and separated by a mass of said plug from said keyway;
• a second base separated by an axial length of said plug from said first base, said second base bearing means for supporting a cam, said mass being perforated by an aperture;
• an exterior surface extending between and engaging said first base and said second base;
• a detent positioned between said first base and said second base to reciprocate between a first location with said detent simultaneously engaging said plug and a cylinder surrounding said plug, and a second location releasing said plug for rotation relative to the cylinder;
• a locking element disposed within said aperture to reciprocate with said plug in response to a key inserted into said keyway to accommodate reciprocation of said detent relative to said plug and rotation of said plug relative to the cylinder when the key while inserted into said keyway engages in a selected relation with said locking element, and obstructing said reciprocation absent said selected relation;
• an electronic logic circuit borne by said plug while coupled to receive electrical power and data signals, and generate control signals in dependence upon said electrical power and data signals;
• and
• an electrical operator disposed within said aperture, said operator having a distal member travelling in dependence upon said control signals between a first position relative to said exterior surface accommodating said reciprocation and a second and different position relative to said exterior surface obstructing said reciprocation.

A plug, comprising:

• a first base bearing a key engaging surface and providing an electrical conductor;
• a second base separated by an axial length of said plug from said first base, said second base bearing means for supporting a cam, said axial length being perforated by an aperture;
• an exterior surface extending between and engaging said first base and said second base;
• a detent positioned between said first base and said second base to reciprocate between a first location with said detent simultaneously engaging said plug and a cylinder surrounding said plug, and a second location releasing said plug for rotation relative to the cylinder;
• a locking element disposed within said aperture to reciprocate with said plug in response to a key inserted into said key engaging surface to accommodate reciprocation of said detent relative to said plug and rotation of said plug relative to the cylinder when the key while inserted into said key engaging surface engages in a selected relation with said locking element, and obstructing said reciprocation absent said selected relation;
• said electrical conductor terminating with an electrical contact exposed to an exterior of said first base;
• an electronic logic circuit borne by said plug while coupled to receive data signals from a key inserted into said key engaging surface, and generating control signals in dependence upon said data signals;
• and
• an electrical operator disposed within said aperture, said operator having a distal member traveling in dependence upon said control signals between a first position relative to said exterior surface accommodating said reciprocation and a second and different position relative to said exterior surface obstructing said reciprocation.

A lock, comprising:

• a cylinder containing a hollow interior recess defining a longitudinal axis, and bearing a slot within said recess;
• a plug rotatable from a rest orientation around said longitudinal axis while resident within said hollow recess relative to said cylinder;
• and
• a bar extending into said slot, and providing simultaneous engagement of said cylinder and said plug while said cylinder remains in said rest orientation;
• said plug comprising:
• a first base bearing a keyway providing a first electrical conductor and an orifice spaced-apart from and separated by a mass of said plug from said keyway;
• a second base separated by an axial length of said plug from said first base, said mass being perforated by a radially oriented aperture;
• an exterior surface extending between said first base and said second base;
• a retainer oriented to retain a shank of a key inserted into said keyway while said plug remains in an orientation other than said rest orientation relative to said cylinder, and to accommodate withdrawal of the key from said keyway while said plug is in said rest orientation;
• a second electrical conductor terminating with an electrical contact exposed to an exterior of said first base through said orifice;
• an electronic logic circuit comprising a memory storing a code, said circuit being borne by said plug and coupled to receive data signals through at least one of said first and second electrical conductors, said circuit generating control signals in dependence upon correspondence between said code and information borne by said data signals;
• and
• an electrical operator borne by said plug, said operator having a distal member traveling in dependence upon said control signals between a first position relative to said exterior surface maintaining said simultaneous engagement and a second and different position relative to said exterior surface accommodating movement between said plug and said cylinder.

A lock, comprising:

• a shell containing a hollow recess defining a longitudinal axis and an interior cylindrical surface;
• a cylinder plug rotatable around said longitudinal axis while resident within said hollow recess, said cylinder plug comprising a first base and a second base separated by an axial length of said cylinder plug from said first base;
• a detent interposed between said shell and said cylinder plug to travel generally along a radial plane between a first position engaging both said shell and said plug while obstructing rotation of said cylinder plug within said recess, and a second position accommodating said rotation;
• a logic circuit generating a control signal in response to a comparison between a code set within said logic circuit and a data signal applied to said logic circuit;
• an electrical conductor provided by said plug, operationally connected to said logic circuit;
• and
• an electrical operator comprising an armature, said armature being borne by said cylinder plug and rotating around said longitudinal axis with said plug, said electrical operator being electrically operable to respond to said control signal by moving independently of said travel, between one of a first orientation providing obstruction of said travel and a second and different orientation accommodating said travel, and another of said first orientation and said second orientation.

A lock, comprising:

• a shell containing a hollow recess defining a longitudinal axis and an interior cylindrical surface;
• a cylinder plug rotatable around said longitudinal axis while resident within said hollow recess, said cylinder plug comprising a first base and a second base separated by an axial length of said cylinder plug from said first base;
• a bar interposed between said shell and said cylinder plug to travel generally along a radial plane between a first position engaging both said shell and said plug while obstructing rotation of said cylinder plug within said recess, and a second position accommodating said rotation;
• a logic circuit generating said control signal in response to a comparison between a code set within said logic circuit and a data signal applied to said logic circuit;
• an electrical conductor provided by said plug, conveying said data signal to said logic circuit;
• and
• an electrical operator borne by said cylinder plug and rotatable with said plug, said electrical operator being electrically operable to respond to said control signal by moving between a first orientation providing obstruction of said travel and a second and different orientation accommodating said travel.

A lock, comprising:

• a shell containing a hollow recess defining a longitudinal axis and an interior cylindrical surface;
• a cylinder plug rotatable around said longitudinal axis while resident within said hollow recess;
• and
• a detent interposed between said shell and said cylinder plug to reciprocate between a first position engaging both said shell and said plug while obstructing rotation of said cylinder plug within said recess, and a second position accommodating said rotation;
• said cylinder plug comprising:
• a first base and a second base separated by an axial length of said cylinder plug from said first base;
• and
• an electrical operator borne by said cylinder plug and rotatable with said cylinder plug, said electrical operator being electrically operable to respond to a control signal by moving independently of said detent between one of a first orientation accommodating relative movement between said detent and said cylinder plug and a second and different orientation providing obstruction of said detent, and another of said first orientation and said second orientation, said electrical operator comprising an armature and a coil of an electrically conducting material that is borne by said cylinder plug and wound to drive said armature to move from one of said first and second orientations to the other of said first and second orientations in response to said control signal.

A lock, comprising:

• a shell containing a hollow recess defining a longitudinal axis and an interior cylindrical surface;
• a cylinder plug rotatable around said longitudinal axis while resident within said hollow recess;
• and
• a detent interposed between said shell and said cylinder plug to reciprocate between a first position engaging both said shell and said plug while obstructing rotation of said cylinder plug within said recess, and a second position accommodating said rotation;
• said cylinder plug comprising:
• a first base and a second base separated by an axial length of said cylinder plug from said first base;
• and
• an electrical operator borne by said cylinder plug and rotatable with said cylinder plug, said electrical operator being electrically operable to respond to a control signal by moving independently of said detent between one of a first orientation accommodating relative movement between said detent and said cylinder plug and a second and different orientation providing obstruction of said detent, and another of said first orientation and said second orientation, said electrical operator comprising an armature and a coil of an electrically conducting material that is borne by said cylinder plug and wound to drive said armature to move from said first orientation to said second orientation in response to said control signal.

A lock, comprising:

• a shell containing a hollow recess defining a longitudinal axis and an interior cylindrical surface;
• a cylinder plug rotatable around said longitudinal axis while resident within said hollow recess;
• and
• a detent interposed between said shell and said cylinder plug to reciprocate between a first position engaging both said shell and said plug while obstructing rotation of said cylinder plug within said recess, and a second position accommodating said rotation;
• said cylinder plug comprising:
• a first base and a second base separated by an axial length of said cylinder plug from said first base;
• and
• an electrical operator borne by said cylinder plug and rotatable with said cylinder plug, said electrical operator being electrically operable to respond to a control signal by moving independently of said detent between one of a first orientation accommodating relative movement between said detent and said cylinder plug and a second and different orientation providing obstruction of said detent, and another of said first orientation and said second orientation, said electrical operator comprising an armature and a coil of an electrically conducting material that is borne by said cylinder plug and wound to drive said armature to rotate around an arc in response to said control signal.

A lock, comprising:

• a shell containing a hollow recess defining a longitudinal axis and an interior cylindrical surface;
• a cylinder plug rotatable around said longitudinal axis while resident within said hollow recess;
• and
• a detent interposed between said shell and said cylinder plug to reciprocate between a first position engaging both said shell and said plug while obstructing rotation of said cylinder plug within said recess, and a second position accommodating said rotation;
• said cylinder plug comprising:
• a first base and a second base separated by an axial length of said cylinder plug from said first base;
• and
• an electrical operator borne by said cylinder plug and rotatable with said cylinder plug, said electrical operator being electrically operable to respond to a control signal by moving independently of said detent between one of a first orientation accomodating relative movement between said detent and said cylinder plug and a second and different orientation providing obstruction of said detent, and another of said first orientation and said second orientation, said electrical operator comprising an armature and a coil of an electrically conducting material that is borne by said cylinder plug and wound to drive said armature to reciprocate in response to said control signal along a radial axis that is transverse to said radial plane.

A lock, comprising:

• a shell containing a hollow recess defining a longitudinal axis and an interior cylindrical surface;
• a cylinder plug rotatable around said longitudinal axis while resident within said hollow recess;
• and
• a detent interposed between said shell and said cylinder plug to reciprocate between a first position engaging both said shell and said plug while obstructing rotation of said cylinder plug within said recess, and a second position accommodating said rotation;
• said cylinder plug comprising:
• a first base and a second base separated by an axial length of said cylinder plug from said first base;
• an electrical operator borne by said cylinder plug and rotatable with said cylinder plug, said electrical operator being electrically operable to respond to a control signal by moving independently of said detent between one of a first orientation accommodating relative movement between said detent and said cylinder plug and a second and different orientation providing obstruction of said detent, and another of said first orientation and said second orientation;
• and
• a component biasing said electrical operator to maintain said second orientation providing obstruction of said detent.

A lock, comprising:

• a shell containing a hollow recess defining a longitudinal axis and an interior cylindrical surface;
• a cylinder plug rotatable around said longitudinal axis while resident within said hollow recess;
• and
• a detent interposed between said shell and said cylinder plug to reciprocate between a first position engaging both said shell and said plug while obstructing rotation of said cylinder plug within said recess, and a second position accommodating said rotation;
• said cylinder plug comprising:
• a first base and a second base separated by an axial length of said cylinder plug from said first base;
• an electrical operator borne by said cylinder plug and rotatable with said cylinder plug, said electrical operator being electrically operable to respond to a control signal by moving independently of said detent between one of a first orientation accommodating relative movement between said detent and said cylinder plug and a second and different orientation providing obstruction of said detent, and another of said first orientation and said second orientation;
• a first component biasing said detent to maintain said first position engaging both said shell and said plug;
• and
• a second component biasing said electrical operator to maintain said second orientation providing obstruction of said detent.

A lock, comprising:

• a shell containing a hollow recess defining a longitudinal axis and an interior cylindrical surface;
• a cylinder plug rotatable around said longitudinal axis while resident within said hollow recess;
• a detent interposed between said shell and said cylinder plug to extend generally along a radial plane between a first state engaging both said shell and said plug while obstructing rotation of said cylinder plug within said recess, and a second state accommodating said rotation;
• said cylinder plug comprising:
• a first base and a second base separated by an axial length of said cylinder plug from said first base;
• and
• an electrical operator comprising an armature borne by said cylinder plug and rotatable with said cylinder plug, said electrical operator being electrically operable to respond to a control signal by moving said armature independently of said detent, between one of a first orientation providing obstruction of said rotation during said first state and a second orientation accommodating independent relative movement between said detent and said cylinder plug, and another of said first orientation and said second orientation.

A lock, comprising:

• a shell containing a hollow recess defining a longitudinal axis and an interior cylindrical surface bearing a slot;
• a cylinder plug rotatable around said longitudinal axis while resident within said hollow recess;
• a detent borne by said cylinder plug, said detent having a distal edge extending in a radial direction to said longitudinal axis, and into said slot to form a simultaneous engagement of said shell and said cylinder plug while said lock is in a locked state, and said distal edge maintaining a simultaneous engagement of said shell and said cylinder plug after a torque that is externally applied to said cylinder plug causes rotation of said cylinder plug within said shell;
• said cylinder plug comprising:
• a first base and a second base separated by an axial length of said cylinder plug from said first base;
• an electronic logic circuit comprising a memory storing a code, said circuit generating control signals in dependence upon a comparison between said code and information borne by a data signal received by said cylinder plug from an external source;
• and
• an electrical operator borne by said cylinder plug and rotatable with said cylinder plug, said electrical operator comprising an electrical coil and a movable member traveling in response to said coil, independently of said detent and in dependence upon said control signals, between a first position relative to said exterior surface maintaining said simultaneous engagement by blocking movement by said detent, and a second and different position relative to said exterior surface accommodating movement between said shell and said cylinder plug.

A lock, comprising:

• a cylinder containing a hollow interior recess defining a longitudinal axis, and bearing a cavity within said recess;
• and
• a plug rotatable around said longitudinal axis from a rest orientation relative to said cylinder while resident within said recess;
• and
• a detent extending into said cavity, and providing simultaneous engagement of said cylinder and said plug while said cylinder remains in said rest orientation;
• said plug comprising:
• a first base bearing a keyway providing a first electrical conductor;
• a second base separated by an axial length of said plug from said first base;
• an exterior surface extending between said first base and said second base;
• a second electrical conductor terminating with an electrical contact exposed to an exterior of said first base;
• an electronic logic circuit comprising a memory storing a code, said circuit being borne by said plug and coupled to receive data signals through at least one of said first and second electrical conductors, said circuit generating control signals in dependence upon correspondence between said code and information borne by said data signals;
• and
• an electrical operator borne by said plug, said operator having a distal member traveling in dependence upon said control signals between a first position relative to said exterior surface maintaining said simultaneous engagement by said detent and a second and different position accommodating movement between said plug and said cylinder.

A lock, comprising:

• a shell containing a hollow recess defining a longitudinal axis and an interior cylindrical surface;
• a cylinder plug rotatable around said longitudinal axis while resident within said hollow recess;
• a detent interposed between said shell and said cylinder plug to reciprocate between a first position engaging both said shell and said plug while obstructing rotation of said cylinder plug within said recess, and a second position accommodating said rotation;
• said cylinder plug comprising:
• a first base and a second base separated by an axial length of said cylinder plug from said first base;
• and
• an electrical operator borne by said cylinder plug and rotatable with said cylinder plug, said electrical operator being electrically operable to respond to a control signal by moving independently of said detent between one of a first orientation accommodating relative movement between said detent and said cylinder plug and a second and different orientation providing obstruction of said detent, and another of said first orientation and said second orientation.

A lock, comprising:

• a shell containing a hollow recess defining a longitudinal axis and an interior cylindrical surface;
• a cylinder plug rotatable around said longitudinal axis while resident within said hollow recess, said cylinder plug comprising a first base and a second base separated by an axial length of said cylinder plug from said first base;
• a detent interposed between said shell and said cylinder plug to travel generally along a radial plane between a first position engaging both said shell and said plug while obstructing rotation of said cylinder plug within said recess, and a second position accommodating said rotation;
• a logic circuit generating a control signal in response to a comparison between a code set within said logic circuit and a data signal applied to said logic circuit;
• an electrical conductor connected to said logic circuit;
• and
• an electrical operator comprising an armature, said armature being borne by said cylinder plug and rotatable with said plug, said electrical operator being electrically operable to respond to said control signal by moving independently of said travel, between one of a first orientation providing obstruction of said travel and a second and different orientation accommodating said travel, and another of said first orientation and said second orientation.