Backus, Quimby S.
Here is a detailed biography from oldtoolheaven.com on Mr. Backus. However, I do find some conflicting information in my research and continue to gather details. For example, the biography states Mr. Backus was in Holyoke, MA in 1876. Contradicting that are scores of newspaper advertisements for his bit brace and Thayer's Patent Combination tool locating Mr. Backus in Winchendon, MA.
Quimby S. Backus Patents from DATAMP
John Adams Thayer Patent 35,715 - Combination Tool (advertisements claim Backus was the "sole manufacturer" in 1876) We also find advertisements by Carpenter & Watkins in Winchendon, MA claiming they manufacture the tool in 1876.