Jot was created mostly to air on Sundays instead of Saturdays, but my earliest memory of these shorts is that it did air locally on Saturdays. 30 episodes were produced between 1965-1974 by an independent animation studio in Texas, with additional episodes produced in 1981. Batman1971 uploaded this short to YouTube:
Jot currently appears on the FamilyNet channel (which is not available in some areas), serving more as a mascot for the network. It wouldn't hurt for those old shorts to be brought back into general syndication, a reminder of simpler, happier times.