Tumbler lock

Claim 1

A TUMBLER LOCK COMPRISING: A HOUSING, A PAIR OF JUXTAPOSITIONED RELATIVELY MOVABLE MEMBERS DISPOSED WITHIN SAID HOUSING, EACH OF SAID MEMBERS HAVING A PLURALITY OF AXIALLY ALIGNED BORES FORMED THEREIN, LOCK PINS MOUNTED IN THE BORE OF ONE OF SAID MEMBERS, MEANS FOR NORMALLY BIASING SAID LOCK PINS SO THAT THE ENDS OF SAID RESPECTIVE LOCK PINS EXTEN INTO THE ALIGNED BORES OF SAID OTHER MEMBER TO PROHIBIT RELATIVE MOVEMENT THEREBETWEEN, CODE PINS DISPOSED IN THE BORE OF SAID OTHER MEMBER, A KEY GUIDE, MEANS FOR CONNECTING SAID KEY GUIDE FOR FREE RELATIVE ROTATION WITH RESPECT TO SAID OTHER MEMBER, AND A KEY MEANS FOR EFFECTING AXIAL DISPLACEMENT OF SAID CODE PINS AND LOCK PINS A PROPORTIONAL AMOUNT TO DISENGAGE SAID LOCK FROM SAID OTHER MEMBER, AND COMPLEMENTARY MEANS ON SAID KEY MEANS AND SAID OTHER MEMBER FOR EFFECTING A DRIVING CONNECTION BETWEEN SAID KEY MEANS AND SAID OTHER MEMBER WHEREBY SAID DRIVING CONNECTION IS ENGAGED ONLY AFTER SAID CODE PINS HAVE BEEN DISPLACED A PROPORTIONAL AMOUNT NECESSARY TO PERMIT RELATIVE MOVEMENT BETWEEN SAID MEMBERS.