IMPROVEMENTS IN THE CONSTRUCTION OF LOCOMOTIVE ENGINES, PARTS OF WHICH IMPROVEMENTS ARE APPLICABLE TO OTHER ENGINES
Year: 1853

page_text: PROVISIONAL SPECIFICATION left by William Pearce at the
Office of the Commissioners of Patents, with his Petition,
on the 18th April 1853.-A communication.
(Void by reason of notice to proceed not having been given within the
time prescribed by the Act.)
I, WILLIAM PEARCE, of Arlington Street, Myddelton Square, in the
County of Middlesex, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN THE CONSTRUCTION OF LOCOMOTIVE ENGINES, PARTS OF
WHICH IMPROVEMENTS ARE APPLICABLE TO OTHER ENGINES," to be as fol-
lows:-
This Invention consists in certain new mechanical arrangements
and combinations of parts, having for their object, firstly, the simpli-
fication of the mechanism of locomotive engines generally; secondly, the
economizing of the power employed for imparting motion thereto; and,
thirdly, a more simple and effective mode of gearing the wheel work
of engines, and applicable to all kinds of engines, whether worked by
steam, water, or other power; and, in order to ascertain the nature of

page_text: this Invention more fully, reference must be had to the illustrative
sheets of drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Sheet 1, exhibits a side elevation of a locomotive engine, arranged
and combined according to this Invention; Sheet 2, is a top plan view
of some of the arrangements shewn at Sheet 1. At each of these sheets
of drawings similar letters of reference are employed to denote corre-
sponding parts. A, A, mark the framing of the engine; B, B, driving
wheels, fixed upon the axle C; D, D, trailing wheels; E, a spur wheel,
securely fixed upon the axle C; G, a spur wheel, fixed upon an axis H,
the ends whereof are formed with journals, as shewn, which revolve in
suitable bearings, fixed to the framing A, A, but not shewn by the
drawings. I, 'marks another spur wheel, securely fixed upon the axis
K. It will be seen, upon referring to Sheet 2, of the Drawings, that
there are cranks L, L, which should be fixed upon each end of the
axis K; and that said axis is formed without journals, and does not
revolve in bearings; but the spur wheel I, as also the fly wheels M, M,
and axis K, upon which they are fixed, are retained in their proper
position by the teeth thereof gearing or taking into the spur wheels
E, and G; said wheels being formed with flanges at each side thereof
to prevent side movement of the wheels I, and M. By this arrange-
ment it will appear manifest, as the spur wheel I, rotates, through the
agency of the cranks L, L, connecting rods N, N, and the pressure
of the steam upon the pistons within the cylinders O, O, that the teeth
of the spur wheel I, pressing against the teeth of the wheels E, and G,
will impart motion to said wheels in opposite directions; and it should
be observed, that the wheel G, is employed solely for the purpose of
maintaining the wheel I, in its proper position for imparting motion to
the
spur wheel G, and axle C, and driving wheels B, B, keyed thereon.
And this mode of arranging and connecting by gearing the intermediate
wheel with the wheels E, and G, forms an important feature in this
Invention, and is alike applicable to engines other than locomotives,
whether the same be workel by steam, water, manual or other power.

page_text: Another feature in this Invention consists in a new mode of arranging
or disposing the cams of the eccentrics employed for working the feed
pump or pumps of locomotive engines, which is effected by placing the
cams P, P, upon the axle C, of the auxiliary driving wheel E, as shewn
at Sheet 2, instead of placing the same upon the axle of the main driving
wheels, as hitherto practised. It should also be observed that, in addi-
tion to the breaks ordinarily employed, and attached to the several
carriages composing a railway train, and which are more particularly
under the control of the guard of the train, it is proposed by this
Invention to employ friction bands Q, Q, as shewn by red lines, which
may be brought into contact with the peripheries of the wheels M, by
means of the rod R, and levers S, fixed upon the axis T; said axis
being formed with journals, which work in bearings attached to the
framing A, A, but not shewn by the drawings.