US4142097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Programmable keyboard sequencing for a security system
Assignee: Scott Technologies Inc
•
Filing: 1977-09-01
•
Granted: 1979-02-27
•
Expires: 1997-09-01
Abstract
Abstract A security system in which personnel are permitted access at certain locations on the basis of data magnetically encoded on a card inserted into the system by the personnel. Access is also limited on the basis of keyboard data entered at the remote location by personnel wishing access. The keyboard data required for entry is a permutation and combination of the data on the employee's card, the particular combination and permutation required at each remote location being independently programmable by switches accessible on the inside of the remote security system.
Inventors
- 👤 Bryan D. Ulch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:20
CPC Classifications
G; G07; G07C; G07C9/00; G07C9/20; G07C9/215; G07C9/22; G07C9/23; G07C9/27
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
80 words
A circuit used in conjunction with a multi-digit data encoded card for controlling access at a location, comprising: means sensing and storing said multi-digit data from said encoded card in a predetermined order; means connected to said sensing and storing means for reordering said multi-digit data to a second order; a keyboard; means for comparing data entered on said keyboard with said multi-digit data in said second order to control said access; and switch means for changing said second order.
Claim 2
Dependent Claim
80 words
A circuit used in conjunction with a multi-digit data encoded card for controlling access at a location, comprising: means sensing and storing said multi-digit data from said encoded card in a predetermined order; means connected to said sensing and storing means for reordering said multi-digit data to a second order; a keyboard; means for comparing data entered on said keyboard with said multi-digit data in said second order to control said access; and switch means for changing said second order.
Claim 3
Dependent Claim
43 words
A circuit used in conjunction with a multi-digit data encoded card as defined in claim 1 wherein said means for reordering comprises plural switches, said switches controlling the order of access of data from said sensing and storing means to said comparing means.
Claim 4
Dependent Claim
35 words
A circuit used in conjunction with a multi-digit data encoded card as defined in claim 1 wherein said means for reordering additionally selects a subset from said multi-digit data for access to said comparing means.
Claim 5
Dependent Claim
41 words
A circuit used in conjunction with a multi-digit data encoded card as defined in claim 3 wherein said means for reordering comprises plural switches, said switches selecting the order of access of data from said storing means to said comparing means.
Claim 6
Dependent Claim
34 words
A circuit used in conjunction with a multi-digit data encoded card as defined in claim 4 wherein said plural switches control the subset of said multi-digit data to be accessed to said comparing means.
Claim 7
Dependent Claim
48 words
A circuit used in conjunction with a multi-digit data encoded card as defined in claim 1 additionally comprising: means delaying further operation of said comparing means in response to failure of said data entered on said keyboard to properly compare with said multi-digit data in said second order.
Claim 8
Dependent Claim
41 words
A circuit used in conjunction with a multi-digit data encoded card as defined in claim 1 additionally comprising: means for comparing said multi-digit data from said encoded card with data stored in a memory to further control access at said location.
Claim 9
Dependent Claim
24 words
A circuit used in conjunction with a multi-digit data encoded card as defined in claim 1 wherein said switch means comprises plural coded switches.
Claim 10
Dependent Claim
27 words
A circuit used in conjunction with a multi-digit data encoded card as defined in claim 1 additionally comprising: keylock means for limiting access to said switch means.
Claim 11
Dependent Claim
72 words
A circuit used in conjunction with a data encoded card for limiting access at a location, comprising: a keyboard providing keystroke data; means sensing data from said encoded card to provide card data; means scrambling said card data in a predetermined pattern to provide scrambled data; means comparing said scrambled data with keystroke data from said keyboard and controlling access based on said comparison; and switch means for altering said predetermined pattern.
Claim 12
Dependent Claim
72 words
A circuit used in conjunction with a data encoded card for limiting access at a location, comprising: a keyboard providing keystroke data; means sensing data from said encoded card to provide card data; means scrambling said card data in a predetermined pattern to provide scrambled data; means comparing said scrambled data with keystroke data from said keyboard and controlling access based on said comparison; and switch means for altering said predetermined pattern.
Claim 13
Dependent Claim
34 words
A circuit used in conjunction with a data encoded card as defined in claim 10 wherein said switch means additionally selects a subset of said data from said encoded card for said predetermined pattern.
Claim 14
Dependent Claim
33 words
A circuit used in conjunction with a data encoded card as defined in claim 11 wherein said switch means permits a repetition of certain data from said encoded card in said predetermined pattern.
Claim 15
Dependent Claim
24 words
A circuit used in conjunction with a data encoded card as defined in claim 10 additionally comprising: means limiting access to said switch means.
Claim 16
Dependent Claim
30 words
A circuit used in conjunction with a data encoded card as defined in claim 10 wherein said switch means operates to permit alteration of said predetermined pattern at said location.
Claim 17
Dependent Claim
97 words
Apparatus for controlling access, comprising: means for reading a multi-digit number in a predetermined order from a magnetically encoded data card; storage means connected to said reading means for storing said multi-digit number; means connected to said storage means for accessing said multi-digit number in a selected order; switch means connected to said accessing means for adjusting said selected order; means for inputting a second multi-digit number, in sequence; and means connected with said accessing means for sequentially comparing said second multi-digit number with said selected order multi-digit number, and for controlling access based on said comparison.
Claim 18
Dependent Claim
97 words
Apparatus for controlling access, comprising: means for reading a multi-digit number in a predetermined order from a magnetically encoded data card; storage means connected to said reading means for storing said multi-digit number; means connected to said storage means for accessing said multi-digit number in a selected order; switch means connected to said accessing means for adjusting said selected order; means for inputting a second multi-digit number, in sequence; and means connected with said accessing means for sequentially comparing said second multi-digit number with said selected order multi-digit number, and for controlling access based on said comparison.
Claim 19
Dependent Claim
23 words
Apparatus for controlling access as defined in claim 15 wherein said means for inputting a second multi-digit number comprises a manually operated keyboard.
Claim 20
Dependent Claim
43 words
Apparatus for controlling access as defined in claim 15 additionally comprising: means for delaying further operation of said comparing means in response to a failure of said comparing means to sense identity between said second multi-digit number and said selected order multi-digit number.
References Cited (Backward Citations)
US3665162A
Cited
US3697729A
Cited
US3794813A
Cited
US3846622A
Cited
US4023012A
Cited
US3996450A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |