US4100534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic security system
Assignee: Tuthill Corp
•
Filing: 1976-12-09
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Granted: 1978-07-11
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Expires: 1996-12-09
Abstract
Abstract Apparatus for obtaining limited access to a given function in response to the entry of a preselected code sequence. A plurality of preselected code sequences are generated by the apparatus and compared sequentially with an entered code sequence. In the event that a generated code sequence has a preselected degree of coincidence with the entered code sequence, the desired function is enabled. A plurality of functions may be controlled by the same apparatus. Alternatively, a plurality of different code sequences may be employed to enable the same function while the apparatus individually monitors which code sequence is used to enable the function. In a preferred embodiment, the function being controlled is a fluid dispensing pump which is enabled by any one of a plurality of entered code sequences while the amount dispensed through the use of each entered code sequence is monitored individually. Provision is made for the collective and individual alteration of code sequences within the generated code sequences.
Inventors
- 👤 Glynne W. Shifflet, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:37
CPC Classifications
G; G07; G07F; G07F7/00; G07F7/08; G07C; G07C9/00; G07C9/00174; G07C9/00658; G07C9/00674; G07C9/0069; G07C9/30; G07C9/32; G07C9/33; G07F13/00; G07F13/02; G07F13/025
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
142 words
In a device for obtaining limited access to a plurality of functions in response to the external entry of preselected code sequences of the type having means for entering a code sequence and means for selectively enabling said functions in response to said entered code sequences, the improvement which comprises: means for sequentially generating a plurality of preselected code sequences, each having a higher rank than all prior generated code sequences; means for individually comparing said generated code sequences with an entered code sequence to establish their degree of coincidence therewith; and means responsive to said comparing means for enabling said functions on the occurrance of a preselected degree of coincidence between a generated code sequence and an entered code sequence in predetermined correspondence with rank of a generated code sequence having said preselected degree of coincidence with said entered code sequence.
Claim 2
Dependent Claim
142 words
In a device for obtaining limited access to a plurality of functions in response to the external entry of preselected code sequences of the type having means for entering a code sequence and means for selectively enabling said functions in response to said entered code sequences, the improvement which comprises: means for sequentially generating a plurality of preselected code sequences, each having a higher rank than all prior generated code sequences; means for individually comparing said generated code sequences with an entered code sequence to establish their degree of coincidence therewith; and means responsive to said comparing means for enabling said functions on the occurrance of a preselected degree of coincidence between a generated code sequence and an entered code sequence in predetermined correspondence with rank of a generated code sequence having said preselected degree of coincidence with said entered code sequence.
Claim 3
Dependent Claim
34 words
The device of claim 1 further comprising means for storing an entered code sequence, said storing means including means for presenting a stored code sequence to said comparing means during each generated code sequence.
Claim 4
Dependent Claim
18 words
The device of claim 1 wherein said generating means sequentially generates a plurality of preselected, non-repeating code sequences.
Claim 5
Dependent Claim
34 words
The device of claim 3 further comprising means for storing an entered code sequence, said storing means including means for presenting a stored code sequence to said comparing means during each generated code sequence.
Claim 6
Dependent Claim
14 words
The device of claim 1 wherein said generating means comprises pseudo-random code generating means.
Claim 7
Dependent Claim
34 words
The device of claim 5 further comprising means for storing an entered code sequence, said storing means including means for presenting a stored code sequence to said comparing means during each generated code sequence.
Claim 8
Dependent Claim
19 words
The device of claim 1 wherein said generating means comprises selective means for collectively altering said generated code sequences.
Claim 9
Dependent Claim
14 words
The device of claim 7 wherein said generating means comprises pseudo-random code generating means.
Claim 10
Dependent Claim
20 words
The device of claim 7 wherein said generating means further comprises selective means for individually altering said generated code sequences.
Claim 11
Dependent Claim
14 words
The device of claim 9 wherein said generating means comprises pseudo-random code generating means.
Claim 12
Dependent Claim
34 words
The device of claim 10 further comprising means for storing an entered code sequence, said storing means including means for presenting a stored code sequence to said comparing means during each generated code sequence.
Claim 13
Dependent Claim
19 words
The device of claim 1 wherein said generating means comprises selective means for individually altering said generated code sequences.
Claim 14
Dependent Claim
147 words
In apparatus responsive to externally entered code sequences for selectively enabling a plurality of functions in predetermined correspondence with the entry to preselected code sequences, means for detecting the entry of said preselected code sequences which comprises: means for storing an entered code sequence; means for sequentially generating a plurality of preselected code sequences; comparator means connected to receive each generated code sequence to individually establish their degree of conincidence with said entered code sequence, said storing means comprising means for presenting said entered code sequence to said comparator means during each generated code sequence; and means responsive to said comparator means for enabling said functions on the occurrence of a preselected degree of coincidence between a generated code sequence and an entered code sequence in predetermined correspondence with the rank of a generated code sequence having said preselected degree of coincidence with said entered code sequence.
Claim 15
Dependent Claim
147 words
In apparatus responsive to externally entered code sequences for selectively enabling a plurality of functions in predetermined correspondence with the entry to preselected code sequences, means for detecting the entry of said preselected code sequences which comprises: means for storing an entered code sequence; means for sequentially generating a plurality of preselected code sequences; comparator means connected to receive each generated code sequence to individually establish their degree of conincidence with said entered code sequence, said storing means comprising means for presenting said entered code sequence to said comparator means during each generated code sequence; and means responsive to said comparator means for enabling said functions on the occurrence of a preselected degree of coincidence between a generated code sequence and an entered code sequence in predetermined correspondence with the rank of a generated code sequence having said preselected degree of coincidence with said entered code sequence.
Claim 16
Dependent Claim
34 words
Apparatus according to claim 13 wherein said code sequence generating means is disabled on the establishment of said preselected degree of coincidence of said entered code sequence with one of said generated code sequences.
Claim 17
Dependent Claim
31 words
Apparatus according to claim 14 wherein said storing means comprises shift register means and means for cycling said entered code sequence through said shift register means during each generated code sequence.
Claim 18
Dependent Claim
18 words
Apparatus according to claim 15 wherein said generating means sequentially generates a plurality of preselected, non-repeating code sequences.
Claim 19
Dependent Claim
14 words
Apparatus according to claim 15 wherein said generating means comprises pseudo-random code generating means.
Claim 20
Dependent Claim
20 words
Apparatus according to claim 17 wherein said generating means further comprises selective means for collectively altering said generated code sequences.
Claim 21
Dependent Claim
20 words
Apparatus according to claim 18 wherein said generating means further comprises selective means for individually altering said generated code sequences.
Claim 22
Dependent Claim
14 words
Apparatus according to claim 13 wherein said generating means comprises pseudo-random code generating means.
Claim 23
Dependent Claim
19 words
Apparatus according to claim 20 wherein said generating means further comprises means for collectively altering said generated code sequences.
Claim 24
Dependent Claim
20 words
Apparatus according to claim 21 wherein said generating means further comprises selective means for individually altering said generated code sequences.
Claim 25
Dependent Claim
30 words
Apparatus according to claim 22 further comprising means for indicating the establishment of a preselected degree of coincidence of said entered code sequence with one of said generated code sequences.
Claim 26
Dependent Claim
20 words
Apparatus according to claim 20 wherein said generating means further comprises selective means for individually altering said generated code sequences.
Claim 27
Dependent Claim
128 words
Apparatus responsive to externally entered code sequences for selectively enabling a plurality of functions in predetermined correspondence with the entry of preselected code sequences which comprises: keyboard means for external entry of a code sequence; means for storing an externally entered code sequence; means for sequentially generating a plurality of preselected code sequences; comparator means for establishing the relative coincidence between said entered code sequence and each of said generated code sequences; means for indicating the establishment of a preselected degree of coincidence between said entered code sequence; and means responsive to the order of code sequence generation for enabling said functions in accordance with the rank of a generated code sequence within said generation order which has said preselected degree of coincidence with said entered code sequence.
Claim 28
Dependent Claim
128 words
Apparatus responsive to externally entered code sequences for selectively enabling a plurality of functions in predetermined correspondence with the entry of preselected code sequences which comprises: keyboard means for external entry of a code sequence; means for storing an externally entered code sequence; means for sequentially generating a plurality of preselected code sequences; comparator means for establishing the relative coincidence between said entered code sequence and each of said generated code sequences; means for indicating the establishment of a preselected degree of coincidence between said entered code sequence; and means responsive to the order of code sequence generation for enabling said functions in accordance with the rank of a generated code sequence within said generation order which has said preselected degree of coincidence with said entered code sequence.
Claim 29
Dependent Claim
34 words
Apparatus according to claim 25 wherein said code sequence generating means is disabled on the establishment of said preselected degree of coincidence of said entered code sequence with one of said generated code sequences.
Claim 30
Dependent Claim
31 words
Apparatus according to claim 26 wherein said storing means comprises shift register means and means for cycling said entered code sequence through said shift register means during each generated code sequence.
Claim 31
Dependent Claim
18 words
Apparatus according to claim 25 wherein said keyboard means and said generating means each comprise octal coding means.
Claim 32
Dependent Claim
18 words
Apparatus according to claim 28 wherein said generating means sequentially generates a plurality of preselected, non-repeating code sequences.
Claim 33
Dependent Claim
14 words
Apparatus according to claim 28 wherein said generating means comprises pseudo-random code generating means.
Claim 34
Dependent Claim
20 words
Apparatus according to claim 28 wherein said generating means further comprises selective means for collectively altering said generated code sequences.
Claim 35
Dependent Claim
20 words
Apparatus according to claim 31 wherein said generating means further comprises selective means for individually altering said generated code sequences.
Claim 36
Dependent Claim
20 words
Apparatus according to claim 28 wherein said generating means further comprises selective means for individually altering said generated code sequences.
Claim 37
Dependent Claim
23 words
Apparatus according to claim 25 further comprising means for disabling said indicating means during preselected ones of said plurality of preselected code sequences.
References Cited (Backward Citations)
US3492656A
Cited
US3484744A
Cited
US3587051A
Cited
US3694757A
Cited
US3800284A
Cited
US3997764A
Cited
US3931497A
Cited
US3999181A
Cited
US3942152A
Cited
US3944976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |