| 摘要 |
A general purpose presettable electro-mechanical combination lock and safety device to replace locks on doors, safes and the like, and to prevent automobile thefts. The device comprises an electrically responsive lock or other electro-mechanical means which is commanded to operate by a preselected numerical combination of several digits in a sequential series through a presettable electronic circuit. The operation of the lock or electro-mechanical means is controlled by a presettable command circuit and activated by a numerical selecting means or by a by-pass switch means, depending on the requirements of the protection desired. |
