Max Leroy Flack

US Patent:

42625076, Apr 21, 1981

Filed:

Dec 26, 1978

Appl. No.:

5/972977

Inventors:

Max L. Flack - Noblesville IN
William G. Roos - Indianapolis IN

Assignee:

Best Lock Corporation - Indianapolis IN

International Classification:

E05B 4100

US Classification:

70432

Abstract:

Apparatus for providing a "hotel function" in a cylinder lock having a key-removable locking core in its outside knob. Actuation of a push button in the inside knob causes the core to be disabled from retracting the bolt and projects an indicator from the face of the outside knob. The key plug of the core is connected to rotate a throw member which is axially movable between an inward operative position and an outward disabling position. The throw member is connected to the roll-back cam by a flat blade slidable in a cross slot in the roll-back cam sleeve. In the operative position of the throw member, a full width section of the blade lies in the cross slot to clutch the blade to the roll-back cam, while in the disabling position, a narrowed section of the blade lies in the cross slot and is rotatable therein so as to declutch the blade from the roll-back cam. The throw member is biased to operative position and, when thrust to disabling position by the push button, is latched by a catch piece carried by the bolt retractor. The indicator is connected by a collar to the throw member so as to be moved axially to its projected position when the push button is actuated.