Security system
OwnerAvi N. Nelsoninventor
Life of this patent
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Abstract
A security system uses one electronic key that contains many key codes of the user to control several different security devices. Each security device responds to a particular key code or to more than one key code in a master lock system. The key when energized presents its entire repertoire of key codes to the security device and when the security device senses its corresponding code, access is gained. The key may or may not be electrically active. The key may also include mechanical as well as electronic access control. Each security device contains a stored code and electronically correlates the stored code and input pulse patterns of the key codes. A large number of key codes are possible without compromise of system security.
Claims12
A security system for control of a desired operation comprising
- a key storing a plurality of multidigit key codes, each said key code corresponding to a different controlled operation,
- a cooperating security device including a stored multidigit device code,
- compare logic for comparing said stored device code with key codes,
- means responsive to detection by said compare logic of a key code that matches said device code to generate an output enabling said desired operation, and
- scan means responsive to presentation of said key to said cooperating security device for rapidly presenting a plurality of key codes stored in said key in sequence to said compare logic for comparison with said device code.
A key for use with a cooperating security device that controls a desired operation and includes
- a stored multidigit device code,
- compare logic for comparing said stored device code with key codes, and
- means responsive to detection by said compare logic of a key code that matches said device code to generate an output enabling said desired operation,
- said key including memory means storing a plurality of multidigit key codes, and means responsive to presentation of said key to said cooperating security device for rapidly presenting a plurality of key codes stored in said key in sequence to said security device for comparison with said device code.
Dependencies are inferred from the claim text.