| 摘要 |
<p>A time lock for bank vault doors and the like having timer units of the settable dial type, a bolt controlling plunger for locking and releasing a snubber bar blocking bolt mechanism, the timer units having a release pin for releasing the blocking bolt mechanism from said locking position when the dial reaches zero time position, and a shock-resistant plunger latching mechanism which will oppose by a sufficiently high counterforce the dynamic opening forces resulting from relative movements between the timing unit release pins and the locking system during shocks, but which will not oppose by any additional counterforce the normal opening forces from the release pin during normal operation in the absence of shocks, by introducing a gear train between the locking device and a relatively small mass to increase the virtual inertia of the system, introducing what appears to be a very high mass at the input of the locking device, and providing an elastic link between the input and the mass enabling the system to absorb movements at the input by severe shocks without the output moving correspondingly.</p> |
