Programmed instruction device

Claim 1

Apparatus comprising first means providing a sequence of first items of intelligence and, in association with each of said first items, a plurality of second items of intelligence one of which relates correctly to the associated first item and the remainder of which do not, and second means for transporting said first items and the second items associated therewith sequentially through an active zone, said second means including independently operable operating members corresponding in number to the number of second items for each first item, one of the operating members corresponding, for each said first item, to said one second item and being operable to move the next in the sequence of first items and the seCond items associated therewith into said active zone; said first means including a support including a sequence of frames each having therein one of said first items and including engagement means selectively positioned to be engaged with said one operating member for the displacement of said support; said support including a plurality of selection zones extending adjacent the sequence of frames and equal in number to the number of operating members, said engagement means including in predetermined relationship to each said frame an engageable section in one of said selection zones, said operating members each including engagement members aligned with one of said selection zones to engage engageable sections therein; said support being a support disc wherein the frames are aligned in circular array, the engageable sections being perforated sections disposed in circular arrays constituting said selection zones and concentric with the first said array; said apparatus further comprising a housing to which said operating members are connected, said disc being replaceably accommodated in said housing and adapted for rotation therein, and optical means determining said active zone; each said operating member including a drive disc, a lever on said disc protruding from the housing, means on the drive disc constituting one of said engagement members and adapted for unidirectional engagement with the perforated sections in the corresponding selection zone, and identifying means for identifying the lever with one of the second items of intelligence.