An Improved Spark Arrester and Conveyor for Locomotives.
Year: 1894

page_text: Date of Application, 7th Sept., 1894
Complete Specification Left. 6th June, 1895-Accepted, 6th July, 1895
PROVISIONAL SPECIFICATION.
An Improved Spark Arrester and Conveyor for Locomotives.
1, JOHN THOMAS KING of Little Rock, Pulaski County, Arkansas, U.S.A.,
Merchant, do hereby declare the nature of this invention to be as follows:-
This invention consists of a pipe leading from just above or behind the chimney
It then branches into two
of the engine to some distance in the rear of the same.
pipes which deliver into the furnace on each side thereof. A fan fitted in a
corresponding enlargement of the pipe is worked by a small engine fed with steam
from the locomotive boiler and sparks and gases coming out of the chimney are
When the
drawn by the fan and impelled also by the head wind into the furnace.
head wind is very strong the fan need not be worked. By means of the current of
air thus forced through the furnace it is claimed that a more perfect combustion is
secured, and the consumption of fuel lessened.
Dated this 7th day of September 1894.
THOMAS R. SHILLITO,
89 Chancery Lane, London, W.C., Agent for the Applicant.
I, JOHN THOMAS KING of Little Rock, Pulaski County, Arkansas, U.S.A.
Merchant, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement :-
In the drawing Fig. 1 is a side elevation of a locomotive with the device of this
invention applied thereto.
Figs. 2, 3, 4 and 5 refer to details.
A is a locomotive, B the chimney, C the fire box.
The invention consists of the horizontal smoke pipe D having a funnel shaped
mouth d resting on and attached to the top of the chimney, said pipe extending
d2 15
backward and having an enlarged globular part d¹ to receive a rotary fan e.
a pipe extending downwards from the globular part and then dividing into two
branches d³ one on each side of the locomotive, their bottom ends turning into the
respective sides of the fire box. The fan e is fixed on a spindle e¹ journalled in
bearings f,, secured to the sides of the pipe d². g is a bevel wheel on spindle el
meshing with a like wheel on a spindle h carried at its upper end in a bearing h
upon an arm extending from the arm of bearing and at its lower end in a
bearing secured to the boiler casing. On the lower end of this vertical spindle
is carried a toothed wheel which is engaged by a corresponding wheel i driven by a
small steam engine E attached to and fed by steam from the boiler. The flow of
steam to the engine E is controlled by the engine driver from a suitable place, in
the case of locomotives from the cab.
In locomotive engines, when the engine is moving rapidly forward or when it is
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page_text: running slowly in the face of the wind, it is not necessary that the rotary fan e,
should be kept in motion, and on such occasions steam may be turned off from the
engine E. When slowing down, or when otherwise necessary, the speed of the fan
can be lessened by the engineer controlling the steam feed. The description of
mechanism to operate the fan may be varied to suit each particular locomotive or
stationary engine to which the invention is applied, and the securing and fastening
of the various parts for proper working will depend to some extent, upon the
construction of the engine or boiler.
As the open funnel shaped mouth of the pipe D, might offer some resistance to
the locomotive where great speed is sought to be obtained, this pipe may be designed
with its front end coming down over the top of the chimney in the form of a
hood D', the hood to stand in front from a line d' drawn through the chimney a
little back of its centre. This hood comes sufficiently forward to allow sufficient
space for the admission of air to pass up under the hood and through the pipe D.
The projection do, of the hood is bell shaped at its lower extremity, and the space
between the chimney and the projection of the hood is governed by the size of the
chimney and use of the engine.
Should it at any time become necessary to reverse the fan e, this may be done by
the engineer reversing the small engine E.
It is claimed first, that by reason of atmospheric pressure when the train is
moving forward, the smoke, sparks, and cinders will be forced backward through the
extension chimney. To further insure this the suction fan is employed. By means
of the atmospheric pressure and the fau, the smoke, sparks, and cinders are carried
back and discharged into the furnace or fire box of the engine, at any given point
or angle as may be necessary to meet the demands for strong draught, or according
to the size or construction of the furnace or fire box. By means of the current of
air forced through the fire box or furnace a more perfect combustion is secured,
and the gas, cinders and other unconsumed portions of the fuel are reduced to a
state of perfect combustion. Second. It will insure a great saving of fuel as well
as adding greatly to the comfort of travellers. Third. It will lessen the danger of
fire from the discharge of sparks from the engine. The provision of the fan renders
it also applicable to stationary engines.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim, is :-
1. In combination with a steam engine, the horizontal pipe D, its front end
secured to and resting on the top of the chimney, enlarged globular part d', part d
extending downward and dividing into two parts d³ one on each side of the boiler,
their lower ends entering each side of the fire box; rotary fan e journalled in said
small stean
enlarged part d' and operated by suitable mechanism driven by
engine E secured to the boiler, fed therefrom and controlled by the engine driver,
substantially as described and shewn and for the purpose specified.
а
2. The horizontal pipe D, its front end secured to and resting on the rear part of
the top of the chimney, its front part D' and bell shaped projection d', extending
forward and coming down over the top of the chimney in the form of a hood;
enlarged globular part d'; part d' extending downward and dividing into two
parts ³, one on each side of the boiler, their lower ends entering each side of the
fire box; rotary fan e, journalled in said enlarged part d and operated by suitable
mechanism driven by a small steam engine E secured to the main boiler, fed there-
from, and controlled by the engineer, substantially as described and shewn and for
the purpose specified.
3. In combination with a steam engine the horizontal pipe D, its front end
secured to and resting on the rear part of the top of the chimney, its front part D
extending forward in the form of a hood and having attached to it a bell shaped
projection d'; enlarged globular part d'; part d' extending downward and dividing
into two parts done on each side of the boiler, their lower ends entering each side

page_text: of the fire box; rotary fan e journalled in said enlarged part d' and operated by
suitable mechanism, substantially as described and shewn and for the purpose
specified.
Dated this 6th day of June 1895.
THOMAS R. SHILLITO,
89 Chancery Lane, London, W.C., Agent for the Applicant.