Mason Bogie locomotive

The American licensee of the Fairlie Patent steam locomotive was the firm of William Mason, located in Taunton, Massachusetts.

In 1869, a Single Fairlie locomotive 0-4-4T had been designed and constructed by Alexander McDonnell for the Great Southern and Western Railway in Ireland.

[1][3] Mason redesigned the faulty castings and designed a new delivery system, in which the pivot point for the leading truck became a hollow ball joint through which the live steam for the cylinders passed.

Additionally, the reversing shaft had to be mounted on top of the boiler, with a long lifting link dropping down to the radius rod, a feature unique to Mason Bogies due to the rotating truck and tight clearances.

"[9] Copies of the DSP&P's biggest engines were built for the Denver, Utah & Pacific, which sold them to the Burlington and Northwestern Railway, a CB&Q subsidiary in Iowa.

[1] Only one Mason Bogie, Torch Lake, survives, at Greenfield Village (part of The Henry Ford) in Dearborn, Michigan, a standard gauge 0-6-4.

Like the Mason Bogie, the Forney has powered axles under the boiler and a trailing truck under the rear bunker and tank behind the cab.

The Wm. Mason , an 1874 0-6-6 Mason Bogie and the first locomotive with Walschaerts valve gear built in the United States. Note the intricate decorative work.
Boston, Revere Beach & Lynn #6, an 1886 product of Mason Machine Works. This is a 2-4-4 Mason Bogie. Note the deep firebox permitted by this configuration, and the high reversing shaft (below the bell) with a long lifting link to the valve gear radius rod.
2-4-4T Mason Bogie #10. Mason Machine Works, Taunton, MA. Built 1887. Photo location: Behind the Lynn, MA Train Station of the Boston, Revere Beach and Lynn Railroad. Photo Source: Lynn Museum.
Torch Lake at Greenfield Village