1. Field of Invention
Relates to a tubular key controlled operation of a terminal based on the coded interruption of a light stream therein as read by a counter adapted therewith to make operational a computer program in circuit therewith, the program being identified by said code as read by said counter.
2. Description of the Previous Art
There is not known presently to be any terminal providing access to secured data in a computer by a coded interruption of a light stream generated within the terminal and read by a counter having access to a program in a computer to make the same operational.
The applicant in his U.S. Pat. No. 4,322,719 disclosed a coded solid state entry device by the use of a tubular coded key engaging a plurality of switches to energize a circuit to unlatch tumblers of which a code is read which functions to match with an electronic circuit to allow access or entry.
Known also are terminals which are operated by coded plastic cards which require card reading machines which in turn are adapted to put a computer into an operational mode to perform a specified task.