Tempering galoots

Brian has found the mother lode of patents on tempering. I will be spending 
a little time with classification 432/225 over the next few days.

The patents for tempering sheet metals are interspersed with patents for 
vulcanizing tires in this classification, in case anyone has an allied 
interest.

Thanks Brian

Brent

brian_welch@h... wrote:
> Brent wants to know:
>>Does anyone know of any patents for tempering steel for saws in
> I have found a number of patents in USPTO classification 432/225.
> (Some of these last names should sound familiar!)
> 
> Christopher Richardson was issued patent #157296 in 1874 for
> "Improvements in Flattening and Tempering Saws."
> 
> George F. Simonds was issued patent #169736 in 1875 and reissue
> #7465 in 1877 for "Improvements in Tempering and Forming Articles
> of Steel."
> 
> E. C. Atkins was granted patent #250184 in 1881 for his "Saw
> Tempering Apparatus" and #363271 in 1887
> for his "Saw Tempering and Straightening Machine"