Abstract: A user of a self-powered electronic combination lock rotates an outer dial to cause generators to generate energy for storage in a capacitor bank. The user then rotates an inner dial to cause a microcontroller to sequentially display a combination of numbers, and presses the inner dial to select a displayed number. The microcontroller determines direction and extent of motion of the inner dial by receiving signals derived from Wiegand sensors placed in proximity to a magnetized disc which rotates integrally with the inner dial, and controls the display of numerals on an LCD display accordingly. When the microcontroller determines that a correct combination has been entered, it activates a motor to move a motor cam to act directly on a locking lever so that the locking lever can engage a drive cam integrally linked with the inner dial, to allow the inner dial to withdraw the lock's bolt.

Abstract: A tumbler wheel scrambler assembly for combination locks of the type having a plurality of tumbler wheels and a driving cam arranged in a stack in a lock case with lost motion couplings for rotating the tumbler wheels upon rotation of the driving cam by a dial, and having a slidable bolt and pivoted fence lever for moving the bolt from projected locking position to unlocking position when the proper opening combination has been dialed. The lock case has a scrambler mounting post therein and the scrambler included a two piece housing of mating housing halves collectively defining guide channels for elongated slide members having hook formations protruding into positions to engage with gates of the tumbler wheels for spring forced scrambling of the tumbler wheel positions during displacement of the bolt from projected locking position. The scrambler housing halves have mounting ear formations for collectively encircling the mounting post to pivotally support the scrambler housing from the lock case.

Abstract: A changeable key cylinder padlock including a padlock casing, a shackle moveable between a lower locking position and a upper release position, the casing having a central substantially cylindrical cavity therein located between the sockets shaped to receive and removably house a key lock cylinder. The lock cylinder located in the plug cavity has a first key position and is operable by a operator key and control key to rotate to second and third key positions respectively. Locking spheres are positioned when the lock cylinder occupies the first key position to hold the shackle in the lower locking position and release the shackle at the second and third key positions for movement to said upper release position.

Abstract: A changeable key plug type padlock including a padlock body formed as an upper body section and a lower body section defining a pair of companion relatively displaceable body sections having correspondingly shaped outer peripheries in cross-section forming continuations of each other in aligned registered relation. The padlock casing has laterally spaced sockets disposed partially in both companion body sections opening through the upper portion of the padlock body for receiving legs of a shackle and a central substantially cylindrical plug cavity located between the sockets.