| 摘要 |
A pin tumbler-type lock in which the pin tumblers are movable by a magnetic key into at least two and usually three different positions in each of their aligned apertures between the two parts which are to be locked and unlocked. Only one position for each of the tumblers is its unlocking position. Spring means are provided in either or both parts for moving a tumbler which may be composed of one or two aligned tumbler pins, respectively, into one of the positions, and separate magnetic means are aligned with each of the pin tumblers which means may include a magnet or a magnetizable material. The magnetic key means is employed for attracting, repelling, or not affecting each of the tumblers through its magnetizable means for placing each of the tumblers into its unlocking position. The only difference between the tumblers, if any at all, is in the length of one of the pins thereof, namely, long, medium, or short corresponding to the attracted, repelled or nonaffected positions of its corresponding magnet in the key. |
