IMPROVEMENTS IN CARBURETTORS
Year: 1874

page_text: PROVISIONAL SPECIFICATION left by John Henry Johnson at the
Office of the Commissioners of Patents, with his Petition, on the
7th December 1874.-A communication from abroad by James
F. Lockwood and George E. Lockwood, both of Saint Louis,
State of Missouri, in the United States of America.
I, JOHN HENRY JOHNSON, of 47, Lincoln's Inn Fields, in the County
of Middlesex, Gentleman, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN CARBURETTORS," a communication to me
from abroad by James F. Lockwood and George E. Lockwood, both of
Saint Louis, State of Missouri, in the United States of America, to be as
follows:-
This Invention relates to apparatus for carburetting air and gas, and
has for its object the ensuring a thorough admixture of the air or gas
with the hydrocarbon vapor.
In order to effect this object it is proposed to arrange the apparatus
in the following manner :-An outer casing is provided, to the bottom
of which there is secured an internal cylinder which is perforated at
points adjacent to its upper and lower ends with a number of holes.
From the upper end of the cylinder projects downward and outward an
inclined hood or deflector. The gasoline or other liquid hydrocarbon

page_text: is supplied by a pipe communicating with the bottom of the cylinder,
and the gas or air to be carburetted is also admitted into the cylinder
through a pipe which extends upward into the said cylinder, and -is
capped by a governor or regulator consisting of a cylinder perforated
with holes at or near the top. The said governor or regulator is free
to rise and fall within the fixed cylinder, and may be either open at the
bottom, and entirely independent of the gas or air pipe, or be fitted
round and arranged to be guided in its movements by the said pipe; but
it should be of such height that it may be lowered to its full extent
without closing the mouth of the pipe.
"
The space between the casing and the cylinder firstly herein-before
mentioned, including the space between the latter and the hood or
deflector, is filled with sawdust which readily absorbs and becomes
completely saturated with the liquid hydrocarbon admitted, the said
liquid escaping through the lower perforations of the cylinder into the
outer casing, which is furnished with a gauge cock or cocks and with
an indicator by which the height of the liquid within the apparatus
may be determined.
The gas or air to be carburetted enters the governor or regulator
(which rises and falls in accordance with the pressure) and escapes
through the perforations, riscs to the top of the cylinder,
and escapes
thence through its perforations into the sawdust packed space within
the hood or deflector. By means of this hood or deflector the air or
gas is spread and compelled to pass downward and outward through
the mass of saturated sawdust, and finally rise through the latter before
it can reach the outlet pipe, so that a thorough admixture of the air or
gas with the hydrocarbon vapor given off by the saturated sawdust is
effected.
The regulator or governor with its perforations at or near the top
prevents pulsations or flickering of the gas at the burners, owing to
sudden variations in the pressure of the air or gas supplied to the
apparatus, such variations in pressure being compensated for and
equilibrium maintained by the rising and falling of the regulator or
governor.