Security system employing optical key shape reader
First Claim
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1. A security system comprising:
- means for photoelectrically deriving an electrical signal from a shape characteristic of a key said shape characteristic being the cuts of varying depth on one edge of the shaft of the key, a single linear series of holes of varying diameter in the shaft of the key, or a single linear series of slots of varying heights in the shaft of the key;
means remote from said photoelectrical means for comparing said electrical signal to one or more electrical signals stored in memory to determine whether they are the same; and
means for enabling a function upon determination that said photoelectrically derived electrical signal is the same as said electrical signal stored in memory.
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Abstract
A security system which employs an optical key shaped reader to photoelectrically derive an electrical signal from a shape characteristic of a key is disclosed. The system provides heightened security over standard key operated systems and is particularly well suited for use in motor vehicles.
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Citations
16 Claims
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1. A security system comprising:
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means for photoelectrically deriving an electrical signal from a shape characteristic of a key said shape characteristic being the cuts of varying depth on one edge of the shaft of the key, a single linear series of holes of varying diameter in the shaft of the key, or a single linear series of slots of varying heights in the shaft of the key; means remote from said photoelectrical means for comparing said electrical signal to one or more electrical signals stored in memory to determine whether they are the same; and means for enabling a function upon determination that said photoelectrically derived electrical signal is the same as said electrical signal stored in memory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification