Programmable keyboard sequencing for a security system
First Claim
Patent Images
1. 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.
5 Assignments
0 Petitions
Accused Products
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.
14 Citations
17 Claims
-
1. 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. 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. - View Dependent Claims (11, 12, 13, 14)
-
-
15. 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. - View Dependent Claims (16, 17)
-
Specification