looking for help for a film title all I have to go on is a short memory of a 30's or 40's horror film [seemed from that era] about some kind of bat like man I believe he was a professor or a teacher in a school hall the town was being terriorized by some kind of winged night creature the man always wore a black cape and used canes in each hand to walk the cape of course was his folded wings this movie use to show up on late night tv back in the late 50's and early 60's then just vanished can someone help,,, does this sound familar to anyone else out there? does this movie still exist?