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Yankee Drills


   
 

Working with Hands - James E. Price


 
  Wheeler's Patented Countersink 1 of 3  

Following my last post on the D. F. Barber countersink, Michael Dulong commented he has a Wheeler's Patent countersink with an 1870 patent date imprinted on it.

 

This post provides more detail on Wheeler's Patent countersinks. It is not hard to find this countersink. The hard part is finding the depth gauge that attaches to it.

Asa Wheeler of Brattleboro patented the countersink on April 12, 1870 and it was issued Patent Number 101,796. The following year, 1871, Wheeler patented the depth gauge for his countersink. It was issued Patent Number 116,901, issued on July 11, 1871. The first photo shows representative specimens I pulled from my collection.

This is a representative array of Wheeler Patent countersinks.

The specimen on the left is the first issue of the tool and is imprinted with the 1870 patent date. The second specimen shows an original 1870 tool with the depth gauge patented in 1871. The first gauges were cast in brass. The third specimen is a later production that has no patent imprint and has a thumbscrew for attaching it to the shaft.

Here is a detailed photo of the known kinds of depth gauges for Wheeler Patented countersinks. Each depth gauge is a different shape but all fit in the cutting slot in the head.

These are Wheeler Patent countersinks by later makers.
Apparently, when Wheeler's patent expired, Stearns
and Stanley started making them.

The top specimen is imprinted with, "Stearns". Note that the middle specimen is imprinted "G. B. Wheeler", not Asa Wheeler, the patentee. The bottom specimen is a Stanley production and is so imprinted.


 
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