Rotational range modifier for locking systems

A locking apparatus comprising:

• a cylindrical locking core, the locking core defining a keyway along a longitudinal axis, configured for rotation within a predefined arcuate displacement about the longitudinal axis by an operating key inserted into the keyway;
• a housing defining a longitudinal elongated bore extending between a proximate open end and a distal open end;
• the distal open end of the bore comprising an arcuate track defining a rotationally modified arcuate displacement about the longitudinal axis different from the predefined arcuate displacement, the rotationally modified arcuate displacement extending between a first stop and a second stop;
• a driver releasably connecting to the locking core, the driver and the locking core being configured for insertion into the proximate open end of the elongated bore, for combined synchronous rotation of the driver and the locking core within the elongated bore, the driver comprising a follower travelling within the arcuate track;
• a riser extending in pivoting relation from the driver to engage a retainer within the locking core, for cooperating perpendicular movement of the riser and the retainer relative to the longitudinal axis, between a first position and a second position;
• the riser being in the first position when the locking core is in position for rotational movement relative to the housing and the retainer is adjacent the first stop;
• and
• the riser being in the second position when the follower is within the rotationally modified arcuate displacement, to allow the locking core to rotate about the horizontal axis within the rotationally modified arcuate displacement.

A locking apparatus for use with an insertable cylindrical locking core, the insertable locking core being configured for rotation when in use about a longitudinal axis within a predefined arcuate displacement, the locking apparatus comprising:

• a housing for fixed non-rotating installation within a storage structure, the housing defining a longitudinal elongated bore extending between a proximate open end and a distal open end;
• the housing defining an arcuate track adjacent the distal open end of the bore, the arcuate track defining a rotationally modified arcuate displacement of the locking core different from the predefined arcuate displacement;
• the rotationally modified arcuate displacement is selected from the group consisting of:
• (i) an arcuate displacement which is less than the predetermined arcuate displacement, (ii) an arcuate displacement which is more than the predefined arcuate displacement, (iii) an arcuate displacement which is changed from a clockwise to a counterclockwise direction, and (iv) an arcuate displacement which is changed from a counterclockwise to a clockwise direction;
• a driver configured for releasable engagement with the locking core, when the locking core is inserted into one of either the open proximate end or the open distal end, for combined synchronous rotation of the driver and the locking core within the elongated bore, the driver engaging the arcuate track for rotation within the rotationally modified arcuate displacement;
• a riser extending in pivoting relation from the driver to the locking core when the locking core is inserted into the elongated bore for perpendicular movement of the riser relative to the longitudinal axis, between a first position and a second position;
• the riser being in the first position when the locking core is in position for rotational movement relative to the housing;
• and
• when the riser is in the second position, the riser operatively engages the locking core as the driver is rotating within the rotationally modified arcuate displacement, to allow the locking core to rotate about the horizontal axis within the rotationally modified arcuate displacement.

A locking apparatus comprising:

• a housing adapted to be fixed within a structure, the housing defining an elongated bore extending along a longitudinal axis, between a first open end and a second open end, one of the first and second ends defining a track;
• a driver comprising a follower traveling within the track, within a rotationally modified arcuate displacement defined by the follower traveling within the track;
• and
• a locking core having a configuration for a predefined arcuate displacement which is different from the rotationally modified arcuate displacement, the locking core being insertable into the elongated bore for releasable engagement and synchronized rotation with the driver within the rotationally modified arcuate displacement;
• and
• when in use, a riser extending from the driver and interacting with a reciprocating retainer in the locking core to inhibit unauthorized withdrawal of the locking core from the housing, the riser moving between a first radial position for operation within the predefined arcuate displacement to a second radial position for operation within the rotationally modified arcuate displacement.