Key lock

A magnetically actuatable lock assembly including a housing, first rotatable means in said housing, second rotatable means having front and rear walls, said front wall being in juxtaposition relative to said first rotatable means, overload release means joining said first and second rotatable means for concurrent rotation serving to prevent unauthorized lock operation, annular means including a plurality of apertures therein spaced from said rear wall, said last named means having further means complemental to means within said housing serving to cause reciprocation of said annular means upon rotation of said annular means, magnetic tumbler pin means associated with said second rotatable means, means drivingly associating said second rotatable means and said annular means for unitary rotary movement said tumbler means normally engaging said second rotatable means and said annular means in such a manner as to prevent said reciprocation and thus prevent said unitary rotary movement, and magnetic key means for aligning said tumbler pin means with at least some of said apertures in said annular means and drivably interlocking with said first rotatable means, whereby upon rotation of said magnetic key means said annular means will advance toward said second rotatable means to cause the tumbler pin means to be received within said apertures in said annular means to permit rotation of said annular means and unlatching of said lock.