×

Access- or trnansaction-control

  • US 3,892,948 A
  • Filed: 02/26/1973
  • Issued: 07/01/1975
  • Est. Priority Date: 02/28/1972
  • Status: Expired due to Term
First Claim
Patent Images

1. Equipment for use in the control of authorization of an operation requested by a person comprising:

  • a plurality of manually-operable devices that are operable to enter a word into the equipment, the particular word entered being dependent on which, and in what sequence, the manually-operable devices are operated;

    means to derive signals in accordance with two different words entered respectively by successive sequences of operation of said manually-operable devices;

    comparison means for effecting a comparison between the two different words to detect whether a predetermined correspondence exists between them, said comparison means comprising a signal comparator, a store for storing a multiplicity of words at a multiplicity of addresses respectively, means for reading out a stored word from an address of the store dependent on one of the two entered words, means for supplying signals in accordance with the other entered word to the signal comparator, and means for supplying signals in accordance with the word read out from the store to the signal comparator for comparison with the signals supplied thereto in respect of the said other of the two entered words; and

    means for signifying authorization of said operation in dependence upon the detected existence of said predetermined correspondence.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×