Self-scrambling combination lock

A self-scrambling combination lock, comprising:

• a frame, said frame having a top surface, first and second sides and a bottom surface spaced from said top surface;
• at least two tumbler rings, said tumbler rings being marked with characters used for a combination for said lock;
• an activating slide, said slide moving a locking bar between a locked position and an unlocked position;
• said top surface having openings for said at least two tumbler rings and said activating slide;
• said frame supporting an axle, said axle having an axle end member disposed at a first end a series of longitudinal ridges disposed on its exterior circumference and supporting said at least two tumbler rings;
• an urging member, said urging member being attached to said locking bar and disposed to contact said axle end member as said locking bar is moved from said locked position to said unlocked position:
• said longitudinal ridges extending along a length of said axle and being interrupted by unridged portions, said portions permitting rotation of said tumbler rings;
• said tumbler rings having mating grooves disposed on interior circumferences of said rings, said mating grooves permitting said axle to slide laterally through said tumbler rings when said rings are aligned according to said lock's combination and force input from said activating slide is applied to said axel end member by said urging member, lateral movement of said axle permitting said locking bar to move between said locked position and said unlocked position;
• each of said tumbler rings having a barrel section, each of said barrel sections extending laterally on at least one side of each of said tumbler ring;
• each of said barrel sections being of a smaller diameter than each of said tumbler rings and having a notch disposed on its outer surface, parallel to a longitudinal axis of said axle;
• at least one scrambling bar, said scrambling bar having a first end and a second end, being attached at said first end to said locking bar and having a notch-engaging feature disposed at said second end;
• said scrambling bar being urged toward said barrel section by a first elastic element;
• said notch-engaging feature fitting into said notch when said tumbler ring is positioned according to said lock's combination and said activating slide moves said locking bar from said locked position to said unlocked position;
• said scrambling bar turning said barrel section when said activating slide moves said locking bar from said unlocked position to said locked position;
• said barrel section turning said tumbler ring to a position other than that of said lock's combination upon locking of said lock.

A self-scrambling combination lock, comprising:

• a frame, said frame supporting at least two tumbler rings and an activating slide;
• said tumbler rings being marked with characters used for a combination for said lock, said lock being openable only when said tumbler rings are disposed in an open position related to said combination;
• said activating slide moving a locking bar between a locked position and an unlocked position;
• a scrambling mechanism, said scrambling mechanism being attached to said activating slide and rotating said at least two tumbler rings from said open position to another position upon movement of said activating slide to move the locking bar from said unlocked position to said locked position;
• a body, said body having a top surface, side surfaces, a front surface, a rear surface, an attachment bail and an interior cavity, said interior cavity extending inwardly from an opening in said front surface;
• a retaining ledge, said retaining ledge securing a lower end of said frame to said body by being disposed over a lip in said opening in said body;
• said attachment bail extending upwardly from said top surface of said body and being slidable from a first, open position to a second, closed position;
• a second combination lock, said second combination lock being disposed upon said top surface and securing said bail in said second, closed position;
• a first key lock, said first key lock being disposed within said interior cavity and controlling selection of a combination for said second combination lock;
• said frame being sized and shaped to be removably secured to said opening, controlling access to said interior cavity through said opening;
• a second key lock, said second key lock being disposed in said frame within said interior cavity and controlling selection of a combination for said self-scrambling combination lock;
• and
• whereby, when said attachment bail is locked through a building fixture with said second combination lock, said combination of said self-scrambling combination lock is set and secured with said second key lock, a building key is inserted in said interior cavity and said frame secured to said opening with said self-scrambling combination lock, access to a building is permitted to only those who have been given said combination and changes to said combination and removal of said body are prevented.

A self-scrambling combination lock, comprising:

• a frame, said frame having a top surface, first and second sides and a bottom surface spaced from said top surface;
• at least two tumbler rings, said tumbler rings being marked with characters used for a combination for said lock;
• an activating slide, said slide moving a locking bar between a locked position and an unlocked position;
• said top surface having openings for said at least two tumbler rings and said activating slide;
• said frame supporting an axle, said axle having an axel end member disposed at an exposed end, a series of longitudinal ridges disposed on its exterior circumference and supporting said at least two tumbler rings;
• an urging member, said urging member being attached to said locking bar and disposed to contact said axel end member as said locking bar is moved from said locked position to said unlocked position;
• said longitudinal ridges extending along a length of said axle and being interrupted by unridged portions, said portions permitting rotation of said tumbler rings;
• said tumbler rings having mating grooves disposed on interior circumferences of said rings, said mating grooves permitting said axle to slide laterally through said tumbler rings when said rings are aligned according to said lock's combination and force input from said activating slide is applied to said axel end member by said urging member, lateral movement of said axle permitting said locking bar to move between said locked position and said unlocked position;
• each of said tumbler rings having a barrel section, each of said barrel sections extending laterally on at least one side of each of said tumbler rings;
• each of said barrel sections being of a smaller diameter than each of said tumbler rings and having a notch disposed on its outer surface, parallel to a longitudinal axis of said axle;
• at least one scrambling bar, said scrambling bar having a first end and a second end, being attached at said first end to said locking bar and having a notch-engaging feature disposed at said second end;
• said scrambling bar being urged toward said barrel section by a first elastic element;
• said notch-engaging feature fitting into said notch when said tumbler ring is positioned according to said lock's combination and said activating slide moves said locking bar from said locked position to said unlocked position;
• said scrambling bar turning said barrel section when said activating slide moves said locking bar from said unlocked position to said locked position;
• said barrel section turning said tumbler ring to a position other than that of said lock's combination upon locking of said lock;
• a body, said body having a top surface, side surfaces, a front surface, a rear surface, an attachment bail and an interior cavity, said interior cavity extending inwardly from an opening in said front surface;
• a retaining ledge, said retaining ledge securing a lower end of said frame to said body by being disposed over a lip in said opening in said body;
• said attachment bail extending upwardly from said top surface of said body and being slidable from a first, open position to a second, closed position;
• a second combination lock, said second combination lock being disposed upon said top surface and securing said bail in said second, closed position;
• a first key lock, said first key lock being disposed within said interior cavity and controlling selection of a combination for said second combination lock;
• said frame being sized and shaped to be removably secured to said opening. controlling access to said interior cavity through said opening;
• a second key lock, said second key lock being disposed in said frame within said interior cavity and controlling selection of a combination for said self-scrambling combination lock;
• and
• whereby, when said attachment bail is locked through a building fixture with said second combination lock, said combination of said self-scrambling combination lock is set and secured with said second key lock, a building key is inserted in said interior cavity and said frame secured to said opening with said self-scrambling combination lock, access to a building is permitted to only those who have been given said combination and changes to said combination and removal of said body are prevented.