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The lock needs to function in the dark so when a combination is set the user can unlock the lock by pushing the buttons extruding on the housing a preset number of times to the correct combination. For example, a combination of 1,2,3,4 would have the user push button one, 1 time, button two, 2 times, button three, 3 times and button four, 4 times. If a mistake is made, the user pushes up on the reset clip at bottom of lock and tumblers are reset to original position for user to re-enter combination.
The original concept was to have a spring hold the combination tumbler at a set position determined during assembly. When the tumbler reset bar is moved up by the user pushing up the "clip" on the bottom of the lock the prawls holding the tumbler in position are released and the reset springs bring the tumblers back to their original setting. At the same time if the combination had been set, the reset clip will push up the tumbler bar through the tumbler key holes and the tumblers and c...
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