@b70002 A friend's house built in the 1920's had one in New Orleans. A lot of what one thinks of as "industrial" fans were used in homes, usually in windows, when I was growing up in New Orleans. Look up "Reed Unit Fan": belt drive, almost all used in homes as well as shops/restaurants.
I think this is much later than the 50's/60's...that blade design had a 4-point support on older models. The clever/clean 2-point design was what was on later (new) models until at least the late 70's when I remember seeing them in Universal Furniture on Claiborne Ave. and a hardware store at Ma...
This was a special occasion Parade, New Orleans song when DJ Ricky Merriweather played...Mardi Gras, New Years Eve, those occasional Saturday nights when it just HAPPENED.
No, you weren't the only one apparently!