IMPROVEMENTS IN THE CONSTRUCTION AND ARRANGEMENT OF THE DRIVING MECHANISM OF LOCOMOTIVE ENGINES, APPLICABLE ALSO TO TRAM CARS AND OTHER VEHICLES PROPELLED BY GAS, STEAM, OR OTHER MOTIVE POWER
Year: 1879

page_text: LETTERS PATENT to Samuel Geoghegan, of 81, St. James' Street, Dublin,
Ireland, for the Invention of "IMPROVEMENTS IN THE CONSTRUCTION AND
ARRANGEMENT OF THE DRIVING MECHANISM OF LOCOMOTIVE ENGINES,
APPLICABLE ALSO TO TRAM CARS AND OTHER VEHICLES PROPELLED BY GAS,
STEAM, OR OTHER MOTIVE POWER."
Sealed the 10th February 1880, and dated the 15th August 1879.
PROVISIONAL SPECIFICATION left by the said Samuel Geoghegan at the
Office of the Commissioners of Patents on the 15th August 1879.
SAMUEL GEOGHEGAN, of 81, St. James' Street, Dublin, Ireland. "IMPROVEMENTS
IN THE CONSTRUCTION AND ARRANGEMENT OF THE DRIVING MECHANISM OF Loco-
MOTIVE ENGINES, APPLICABLE ALSO TO TRAM CARS AND OTHER VEHICLES PROPELLED
BY GAS, STEAM, OR OTHER MOTIVE POWER."
This Invention relates to improvements applied to locomotive engines, tram cars,
and other vehicles propelled by gas, steam, or other motive power, whereby the
driving mechanism is removed from proximity to dirt and dust, while it is rendered
easily accessible, and suitable provision is made for the use of springs.
My improvements consist in placing the cylinder or cylinders and crank shaft
upon the top of the boiler in a horizontal position, and in imparting motion to the
axle of the driving wheels by crank and connecting rod direct from the crank shaft
above on both sides of the vehicle.
Also in connecting the upper and lower bearings, that is to say, the crank shaft
and axle bearings rigidly by a pillar or post, the pressure of the spring being
arranged so as to bear upon the upper or crank shaft bearing direct.
On the accompanying three Sheets of Drawing forming part of this my Provisional
Specification,-
Figure 1 represents a side elevation of a locomotive engine embodying my

page_text: A, A, indicate the cylinders; B, the crank shaft; C, axle of driving wheels; D,
the connecting rod; E, the pillar or post; F, the bearing for crauk shaft; G, bearing
for axle C; H, coupling rod; I, I, oil boxes; K, K, channels for oil.
Figures 6 and 7 illustrate a modification of the above, in which the crank shaft
Bis connected by the wheels M, N, O, with the lower or driving axle.
I thus dispense with the connecting rod D, motion being imparted from the crank
shaft to the driving axle by gearing.
P, forked lever carrying wheel N ; Q, centre on which lever P is hung; R, guide
for lever P.
The wheels M, N, O, may be driven by toothed or by frictional gearing.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Samuel Geoghegan in the Great Seal Patent Office on the 12th
February 1880.
SAMUEL GEOGHEGAN, of 81, St. James' Street, Dublin, Ireland. "IMPROVEMENTS
IN THE CONSTRUCTION AND ARRANGEMENT OF THE DRIVING MECHANISM OF Loco-
MOTIVE ENGINES, APPLICABLE ALSO TO TRAM CARS AND OTHER VEHICLES PROPELLED
BY GAS, STEAM, OR OTHER MOTIVE POWER."
This Invention relates to improvements applied to locomotive engines, tram cars,
and other vehicles propelled by gas, steam, or other motive power, whereby the
driving mechanism is removed from proximity to dirt and dust, while it is rendered
easily accessible, and suitable provision is made for the use of springs.
My improvements consist in placing the cylinder or cylinders and crank shaft
upon the top of the boiler in a horizontal position, and imparting motion to the
axle of the driving wheels by crank and connecting rod direct from the crank shaft
above on both sides of the vehicle.
Also in connnecting the upper and lower bearings, that is to say, the crank shaft
and axle bearings rigidly by a pillar or post.
"
And in the general arrangement and construction of the whole, whereby not
only are the axle bearings protected from dust and dirt, but, together with the
axles, springs, and break gear, are readily removed "en masse for inspection or
repairs. Further, the use of ordinary axle slides is entirely avoided by the arrange-
ment of springs, as shown on the Drawings.
Upon the accompanying three Sheets of Drawing,-
Figure 1 (Sheet I.) represents an elevation of a locomotive engine embodying my
Invention.
Figure 2 being a cross section through the same; and
Figure 3 an elevation of the bogie or carriage detached, drawn to an enlarged
scale.
Figure 4 is a cross section through the axle bearing.
A indicates the cylinder; B, crank shaft; C, axle of driving wheels; D, connecting
rod; E, pillar or post; F, bearing for crank shaft; G, bearing for axles; H, coupling
bar or rod; I, oil box; K, K, channels for oil; L, L, springs; M, link connecting
same; N, cross beam or lever; O, O, driving wheels; P, dust protector for axle
bearings.
Upon referring to the above it will be seen that motion is imparted from the
crank shaft B direct to the axle or driving wheel O by means of the rod D, whilst
owing to the arrangement of the springs L, L, and levers M, N, any sudden strain
caused by the rise of one wheel is avoided, the pressure being transferred by the
lever N to a point X directly over the centre of gravity, whereby the amount of
oscillation is reduced to a minimum.
A modification of the above arrangement is shewn upon Sheets II, and III.
Figure 5 being an elevation of a locomotive suitable for a 1-10 inch guage.
Figure 6 is an end view, partly in section.
Figure 7 a sectional plan of the same.
Figure 8 (Sheet III.) represents an elevation of the bogie or carriage detached.
Figure 9 being a cross section through the same.
It will be seen that in lieu of the above arrangement the springs L, L, and levers
M, N, are replaced by the long springs Q, Q and the wheels 0, 0, and axle
bearings G, G, furnished with collars R, S, for their, protection from dust or dirt.
An outer curtain or guard T is also provided for the bogie, and there is a tank U
on either side of the engine.
V is a hood which covers and protects the whole of the working gear of this
engine.

page_text: Figure 10 illustrates the application of my Invention to a self propelling
Figure 11 being an end view of same.
tram car,
In this case the engine or engine and boiler is secured upon the roof of the car,
whence motion is conveyed to the driving wheels O, O, below by the rods D, D,
arranged to work within suitable casings.
Having now described and ascertained the nature of my said Invention, and
in what manner the same is or may be performed, I would have it understood that
my improvements are applicable to vehicles propelled by gas, steam, or other motive
power, and that I do not limit myself to the precise details hereinbefore described
and shown on the accompanying Sheets of Drawing, as modifications may be
necessary to adapt my improvements to particular cases, and that
I claim as secured to me by the hereinbefore in part recited Letters Patent,-
Firstly. In the construction of a locomotive engine, tram car, or other vehicle,
placing the driving or working mechanism above and communicating motion there-
from to the driving wheels, substantially as and for the purpose hereinbefore
specified.
Secondly. In an engine, tram car, or other vehicle having its working mechanism
above, the arrangement and connection of the crank shaft bearing and axle bearings,
substantially as herein before described and shewn on the accompanying Drawings.
Thirdly. In a locomotive engine, tram car, or other vehicle with its working
mechanism above, the arrangement of the bogie or carriage whereby the axle
bearings are protected from dirt, and the whole rendered easily accessible for repairs
and renewal of parts, substantially as described and shewn.
Fourthly. In a locomotive engine, tram car, or other vehicle having its working
mechanism above, the application of springs above the engine or vehicle, substan-
tially as described and shewn, Figs. 1 and 2 (Sheet I.), of the Drawings.
Fifthly. In a locomotive engine, tram car, or other vehicle having its working
mechanism above, the arrangement of long springs in the bogie or carriage, substan-
tially as described and shewn, Figs. 5, 6, 8, and 9 (Sheets II. and III.) of the 3
Drawings.
Lastly. The various modifications of construction and combination whereby my
improvements are adapted to the several vehicles shown on the Drawings, and the
general arrangement of such vehicles, substantially as described and shown.
In witness whereof, I, the said Samuel Geoghegan, have hereunto set my 3
hand and seal, this Sixth day of February, in the year of our Lord One
thousand eight hundred and eighty.