Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
103 words
An access control system responsive to an access signal comprising: a central processing unit, at least one card reader terminal, said card reader terminal comprising at least one first signal generating means for transmitting a first signal responsive to the presence of a proper first code on a card key; said first signal enabling at least one reading means for reading and transmitting to said CPU a second signal, said second signal corresponding to a second code on said card key, said CPU having access signal transmitting means for transmitting an access signal responsive to receipt by said CPU of said second signal.
Claim 2
Dependent Claim
103 words
An access control system responsive to an access signal comprising: a central processing unit, at least one card reader terminal, said card reader terminal comprising at least one first signal generating means for transmitting a first signal responsive to the presence of a proper first code on a card key; said first signal enabling at least one reading means for reading and transmitting to said CPU a second signal, said second signal corresponding to a second code on said card key, said CPU having access signal transmitting means for transmitting an access signal responsive to receipt by said CPU of said second signal.
Claim 3
Dependent Claim
77 words
The access control system of claim 1 in which said central processor unit comprises a microprocessor, said microprocessor having means for storing information corresponding to the second signal translated by said terminal reader representing the second code of said card key; said microprocessor having means for storing information relating to predetermined conditions associated with said second electrical signal, and means for providing an access signal for permitting access to the area upon the presence of proper conditions.
Claim 4
Dependent Claim
35 words
The access control system of claim 2 in which said first signal generator means comprises a programmable lock, said programmable lock permitting transmission of said first signal upon the presence of said proper first code.
Claim 5
Dependent Claim
75 words
The access control system of claim 1 in which said central processor unit comprises a microprocessor, said microprocessor having means for storing information corresponding to the electrical signal generated by said terminal reader representing the second code of said card key; said microprocessor having means for storing information relating to predetermined conditions associated with said first electrical signal, and means for providing a second electrical signal for permitting access to the area upon proper conditions.
Claim 6
Dependent Claim
29 words
The access control system of claim 2 in which a proper condition comprises said second electrical signal being transmitted to said central processing unit during a predetermined time period.
Claim 7
Dependent Claim
39 words
The access control system of claim 2 in which there are a plurality of card reader terminals each of said reader terminals having a unique address for providing a signal to said central processor unit corresponding to its address.
Claim 8
Dependent Claim
24 words
The access control system of claim 2 in which a proper condition comprises said second signal being transmitted from at least one proper address.
Claim 9
Dependent Claim
20 words
The access control system of claim 7 in which said first signal may be transmitted from a plurality of addresses.
Claim 10
Dependent Claim
120 words
An access control system comprising: (a) a card key, said card key magnetized in a predetermined pattern so as to form at least a first code and a second code; (b) a terminal reader, said terminal reader comprising at least one lock means, said lock means responsive to said first code on said card key, to enable at least one reader means for reading said second code and transmitting a first electrical signal corresponding to said second code; (c) A central processor unit for receiving said first electrical signal transmitted from said reader and transmitting a second electrical signal for activating a switch permitting access when said first electrical signal meets the conditions present in said second central processor unit.
Claim 11
Dependent Claim
120 words
An access control system comprising: (a) a card key, said card key magnetized in a predetermined pattern so as to form at least a first code and a second code; (b) a terminal reader, said terminal reader comprising at least one lock means, said lock means responsive to said first code on said card key, to enable at least one reader means for reading said second code and transmitting a first electrical signal corresponding to said second code; (c) A central processor unit for receiving said first electrical signal transmitted from said reader and transmitting a second electrical signal for activating a switch permitting access when said first electrical signal meets the conditions present in said second central processor unit.
Claim 12
Dependent Claim
21 words
The access control system of claim 7 in which said first code of said card key comprises at least two subcodes.
Claim 13
Dependent Claim
53 words
The access control system of claim 9 in which said central processor unit comprises a microprocessor, said microprocessor having means for storing information corresponding to each of said second codes on said card key, said information determining whether said central processor unit will transmit said second electrical signal so as to permit access.
Claim 14
Dependent Claim
30 words
The access control system of claim 9 in which said information stored by said central processing unit comprises the address of said terminal for which said card key is proper.
Claim 15
Dependent Claim
28 words
The access control system of claim 9 in which said information stored by said central processing unit comprises the real time during which said card key is proper.
Claim 16
Dependent Claim
40 words
The access control system of claim 5 in which said microprocessor includes a clock for maintaining real time, said clock powered by a battery power supply in the absence of sufficient power being provided by a first electrical power supply.
Claim 17
Dependent Claim
43 words
The access control system of claim 6 in which said central processor unit has means for sampling a plurality of terminal readers, said terminal readers transmitting said signal to said central processor corresponding to its address during the time said terminal is sampled.
Claim 18
Dependent Claim
31 words
The access control system of claim 15 in which said address signal transmitted to said central processor unit is partially stored in the microprocessor during each sampling cycle of the terminal.
Claim 19
Dependent Claim
31 words
The access control system of claim 16 in which said address signal transmitted to said central processor unit is partially stored in the microprocessor during each sampling cycle of the terminal.
Claim 20
Dependent Claim
49 words
The access control system of claim 11 in which at least one of said terminal readers is accessible from within the facility only after access to the area, said microprocessor preventing access to a cardholder until after said card has been placed in said terminal reader within said facility.
Claim 21
Dependent Claim
43 words
The access control system of claim 11 in which said microprocessor prevents access by use of the same card key until information stored in said microprocessor indicates said card key has been inserted within at least one terminal reader having a selected address.
Claim 22
Dependent Claim
64 words
The access control system of claim 15 in which said electrical signal sampled during the first sampling cycle is compared by said central processor unit with the electrical signal sampled during a second sampling cycle of the same terminal, said central processor unit not permitting access if said first sampled signal is not identical with the electrical signal sampled during said second sampling cycle.
Claim 23
Dependent Claim
31 words
The access control system of claim 20 in which said central processor indicates an alarm in the event more than two consecutive sampling cycles of said terminal reader transmits different addresses.
Claim 24
Dependent Claim
24 words
The access control system of claim 2 in which a proper condition comprises the real time and the address of said reader terminal status.
Claim 25
Dependent Claim
41 words
In the access control system of claim 2 in which said proper condition comprises the real time, the location of the terminal reader, whether the card key has been used to gain access and whether said code is valid for access.