Locks – Operating mechanism – Using a powered device
Patent
1979-01-08
1981-12-29
Britts, Ramon S.
Locks
Operating mechanism
Using a powered device
70 15, 70422, E05B 4700
Patent
active
043075894
ABSTRACT:
A lock comprises a cylindrical case with a turnable member rotatably mounted therein. A latch member is also rotatably mounted in the case. The latch member is rotatable in a first direction to lock the lock and in an opposite second direction to unlock the lock. A drive member is co-rotatably mounted in the case between and with the turnable member and the latch member. At least one magnetically attractable tumbler is movably mounted on the interior of the turnable member and has a portion which projects into engagement with a receiving cavity of the drive member when the lock is in an unlocked position. This permits the drive member to move axially away from the latch so that rotation of the drive member to rotate the latch to an unlocked position will release the latch. The construction includes cam guide means aligned between the case and the drive member in the form of a pin on the case which engages in a groove of the drive member which causes axial displacement of the drive member between two end positions and rotation of the drive member in each end position. A drive pin connection is provided between turnable member and the drive member which is constructed so that it breaks under shearing force before the cam means associated with the drive member breaks, so that the lock cannot be forced open.
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Britts Ramon S.
Pietruszka Carl F.
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