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Alphanumeric entry system having an electronic lock feature

  • US 4,670,747 A
  • Filed: 11/19/1985
  • Issued: 06/02/1987
  • Est. Priority Date: 11/19/1985
  • Status: Expired due to Term
First Claim
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1. A keypad entry system for use with a two-way radio having a receiver and transmitter means, said keypad entry system including a locking mode for electronically disabling the operation of said keypad entry system said system comprising:

  • keypad means having an alphanumeric portion having keys which represent alphabetic and numeric values, and said keypad means further including a function key portion comprising a plurality of function keys;

    display means having an alphanumeric display portion and a menu display portion, said menu portion comprising icons representing categories of system operation, said icons being sequentially stepped under the control of one of said function keys on said keypad means, wherein one of said icons corresponds to a keypad lock function, and wherein said keypad lock function is selectively actuated by another of said function keys when said keypad lock function icon is displayed; and

    first microprocessor means, including data bus interface means, said microprocessor coupled to said keypad means and said display means for decoding commands generated by said keypad means and displaying them on said display means or placing them on said data bus interface means, or decoding commands received from said data bus interface means and displaying then on said display means, and said first microprocessor means inhibiting the icons being stepped when said keypad lock function is actuated.

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