The Samuel D. Edgar Patent
I posted years ago about Charles Edgar's patents. He invented an automatic gate, an improved hay rake and a carburetor that I haven't figured what purpose it had. When he died in 1876 the carburetor patent was the only one that was purchased by a businessman. Any way, it turns out that Charles Edgar's father had a patent issued back in 1869 for this.
I think I need to make one and display it in the house.