Memorizing aid

A memorizing aid comprising:

• a casing having at least one viewing opening in at least one surface thereof;
• a base plate removably mounted within said casing by a frame;
• an endless tape mounted about said base plate and extending over spaced opposite ends thereof, said endless tape having thereon information to be memorized, said information being arranged in units spaced along the endless length of said endless tape;
• a drive roller rotatably mounted at one of said ends of said base plate, said drive roller being in engagement with said endless tape, such that rotation of said drive roller causes said endless tape to move about said base plate;
• and
• means for selectively intermittently rotating said drive roller in opposite directions, and for thereby selectively intermittently moving said endless tape in opposite directions about said base plate, by an amount equal to the spacing between adjacent said units of information on said endless tape, whereby a selected said unit of information on said endless tape is selectively positioned to be visible through said at least one viewing opening in said casing, said rotating means comprising a selectively operable pushbutton, an elongated reciprocating member having a first end adjacent said pushbutton, said reciprocating member adapted to be axially reciprocated upon operation of said pushbutton, a rotor fixed to said drive roller, said rotor including first and second oppositely directed ratchet wheels spaced from each other axially of said drive roller, a second end of said reciprocating member being bifurcated and having first and second pawls selectively engageable with said first and second ratchet wheels, respectively, a selector member connected to said reciprocating member and selectively movable between a first position, whereat said reciprocating member is laterally displaced in a direction axially of said drive roller such that said first pawl engages said first ratchet wheel upon selective operation of said pushbutton and axial reciprocation of said reciprocating member to thereby rotate said drive roller and move said endless tape in a first direction, and a second position, whereat said reciprocating member is laterally displaced in a direction axially of said drive roller such that said second pawl engages said second ratchet wheel upon selective operation of said pushbutton and axial reciprocation of said reciprocating member to thereby rotate said drive roller and move said endless tape in a second direction opposite to said first direction.