My Union Planes and what I know about them
The typical Union Planes are on par with Bailey but, the “X pattern” Unions, with their double adjusting nuts are perhaps a bit superior.
In 1900 Union Purchased Derby (Birmingham) Plane Manufacturing.
1900-1903 Union only manufactured the B plane.
In 1920 Stanley Purchased the Union plane division. (reference Patented Transitional and Metallic Planes in America, 1827-1927 (Vol. I)
In 1957, Millers Falls acquired the Union Tool Company (reference http://oldtoolheaven.com/history/history11.htm)
- The first two from the left are from the Union Patent (see below). Which came first is unknown at this time.
- It’s believe the Union on the cap didn’t come until the Stanley buy out.
- The Cutter with “Union Plane Co” with the hole toward the cutting edge would be Stanley made.
- All the wording or numbering was in the bed behind the frog or tote on early models.
- There are differences in the later Union and Stanley bases. The center post for the frog base is a little different. On some the pin for the lateral washer is distinctive on the Unions, although this is not on all of them.
- Also the knob and tote on Unions are typically mahogany (Union) and not rosewood.
The Union X Series were from patents from John W Carleton and George E Trask.There were two versions, one with the locking nuts and one version with just the lever and no locking nuts. The version without locking nuts were only used on some transitionals
The Union X series was made in X2, X3, X4, X4 ¼, X4 3/8, X4 1/2 , X5, X5A (#5 ½ size), X6, X7, and X8
This is US Patent: 763,721
Applied:Oct. 26, 1903
Granted:Jun. 28, 1904
It was the X500 Series that had the lever without the locking nuts
Granted: Dec. 08, 1903
Here is a typical early Union #3