IMPROVEMENTS IN THE CONSTRUCTION OF STEALI LOCOMOTIVE ENGINES
Year: 1857

page_text: PROVISIONAL SPECIFICATION left by Robert James Maryón at the
Office of the Commissioners of Patents, with his Petition, on the 7th
March 1857.
I, ROBERT JAMES MARYÓN, Mechanician, of No. 40, Hooper Street, West-
minster Road, Lambeth,, in the County of Surry, do hereby declare the nature
of the said Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF STEALI
LOCOMOTIVE ENGINES," to be as follows: _
.....
My Invention mainly consists of effecting rotatory motion of the main
driving wheels of steam locomotives by my construction of an eccentric con-
necting driving shaft and small solid axle arm eccentrics for to work in
concert with the usual old parts of locomotives hitherto used, whereby I
disuse and supplant the usual weak slotted crank axle, and by the arrange-
ment herein-after shewn, whereby I construct a stronger working engine
easier of repair, with reduced or lessened friction, which I effect by forging or
otherwise forming a straight shaft, bending each extremitie into the required
angle in a parrallel line (to fit and connect each driving wheel crank boss
formed therein or applied thereto of cast or wrought iron, but I prefer the
usual cast crank arms as formed in the wheels of outside cylinder-action
engines); I form collar bearings (to connect the usual rods and crank arm
bosses) at each extremity, leaving the body of this shaft straight from shoulder
to shoulder, of increased diameter in its centre, which will be straight grained.
When fitted, this shaft will line diagonal in relation with its connecting crank
arms. (In lieu of forging the collar bearings steel ones may be shrunk on).

page_text: I will now describe my arrangements for working the same said shaft, so far
as that alteration is connected with my Invention,, viz. The driving wheels
short axles I form flush inside the nave, which may be connected by con-
traction by casting it in the nave or by fitting firmly thereto. I form these
short axles of so much bearing outside as necessary to receive the usual frame
blocks, outside of which I work the usual eccentric valve link (outside which,
if required, I apply the usual connecting crank arms for coupling the wheels);
I for to gain strength at a reduced diameter of the usual eccentrics I forge
them of iron or steel in the solid with this aforesaid short axle arm, and turn
my eccentrics out either before or after the axle's unition with the wheel,
whereby I effect a great reduction of their diameter and lessened friction on
the usual straps (and all the other gear of locomotive engines I work as usual
with inside cylinder-action engines, except in regard of their valve, slides,
which may be arranged with their chests outside, or in any way prefered, and
in any line of action, either vertically or horizontally, as is usual with various
class locomotive engines).
I wish it to be plainly understood that what I do claim as my Invention in
this improved construction of locomotive engines consists of my said eccentric
connecting driving shaft construction, as herein given in detail.
Secondly, I claim the improved method of construction of my small eccen-
trics forged in the solid with their axle arms, or its equivalent, for reduction of
their diameter and lessened friction.