Contractor's Narrow Gage
Locomotive
We are illustrating a new type of contractor's steam locomotive,
the machinery or engine parts of which are all confined to one unit,
so small and compact that it can be installed in the narrowest gage
locomotives. The engine unit includes such features as roller
bearings, drop forged parts thruout [sic] and the highest grade
material and workmanshiip [sic] and all working parts are enclosed
in an oil-tight dust-proof case.
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The boiler is of the horizontal type with shell and firebox
head of one piece of pressed steel, and smokebox head welded in. The
shell is wound with several layers of piano wire, thus giving it
great strength without excessive weight. The tubes are expanded into
the front head and brazed into the rear head from the inside of the
boiler by a patented process.
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The fire is so distributed that it gives maximum heat to the
lower tubes, and only a comparatively low heat to the tubes above
the center of the boiler, or those tubes not under water. In other
words, there are tubes where stay bolts are usually employed, and
this feature gives superheated steam without the addition of
superheaters. There are no stays, seams or rivets.
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The boiler plant is extremely compact, absolutely safe,
easily cleaned and so designed that all the tubes may be removed and
replaced in one unit when necessary in from one to two hours' time.
A steam pressure of from 300 to 350 pounds is carried and at this
pressure, the factor of safety is at least 10. The boiler may be
fired from cold in 10 to 30 minutes, or fired instantly after a one
hour's stand.
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These features furnish the contractor with a locomotive that
will run on any fuel, from gasoline and kerosene to crude oil, or
coal or wood, a locomotive that will give no smoke or sparks when
burning kerosene or fuel oil. This type of Bell locomotive may be
started quickly and has the speed of the direct connected locomotive
combined with the power of the geared locomotive.
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