Lock bolt and deadbolt interconnection mechanism

A lock and deadbolt assembly combination comprising:

• a combination lock having an extendable lock bolt;
• a deadbolt assembly comprising an extendable deadbolt;
• said lock bolt and said deadbolt aligned for movement along axes of movement, said axes disposed at least in parallel relation;
• said lock bolt and said deadbolt interconnected by a lost motion interconnection comprising a shaft having two ends, extending between said lock bolt and said deadbolt, a compression spring disposed intermediate said lock bolt and said deadbolt, said spring partially compressed to urge separation of said lock bolt and said deadbolt;
• at least one of said lock bolt and said deadbolt displaceable relative to said shaft and parallel to said shaft;
• said shaft ends passing through at least a portion of said lock bolt and said deadbolt, at least one of said shaft ends at least partially surrounded by a retaining member engageable with a portion of said lock bolt or said deadbolt and retained to be not withdrawable from said lock bolt or said deadbolt;
• whereby movement of said lock bolt in a direction away from said deadbolt moves said ends and said deadbolt is moved by said shaft in the same direction as said lock bolt movement and movement of said lock bolt toward said deadbolt further compresses said spring and urges said deadbolt to a position away from said lock bolt.