Year: 1886

page_text: I, ALFRED GREIG, of Suffolk House, Cannon Street in the City of London,
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to a construction and arrangement of Tramway and other
Locomotive Engines whereby I am enabled to place the engine above the boiler, as
in many portable engines, thereby keeping it clear of dirt, and to drive it at
considerable speed, while the road wheels travel at moderate speed, and are driven
together without cranks and coupling rods. For this purpose, I make the boiler of
the locomotive type with the engine placed horizontally on the top of the barrel of
the boiler, the crank shaft being mounted in bearings on the boiler, and extending
across it.
On either end of the shaft I arrange a toothed pinion which can be
connected to or disconnected from the shaft by a friction clutch; with this pinion
gears a wheel which is free to revolve on a stud axle projecting from the side of
the boiler, and this wheel gears with toothed wheels, one on the shaft of each of
two axles which carry road wheels. Thus four road wheels are driven from the
engine shaft at a speed reduced in proportion as the pinion worked by the shaft is
to the wheels on the road axles. I prefer to connect the brake gear to the lever
that works the friction clutch above mentioned, so that when the clutch is
disengaged the brakes are put on. In order to keep the gearing always properly
engaged, I provide no springs between the body of the vehicle and the road wheels,
these wheels being of a kind which have the springs within themselves.
Instead of employing a toothed pinion, an intermediate wheel and toothed wheels
on the two road axles, a pulley on the shaft driving pulleys on the road axles by
suitable straps may be used.
The intermediate toothed wheel above mentioned I in some cases make with a
barrel constituting a drum on which a rope can be wound for the purpose of
traction or for hauling the vehicle itself up a severe gradient.
1000

page_text: An Improvement in Tramway and other Locomotive Engines.
I, ALFRED GREIG of Suffolk House, Cannon Street in the City of London,
Engineer, 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:-
My invention relates to a construction and arrangement of Tramway and other
Locomotive Engines whereby I am enabled to place the engine above the boiler, as
in many portable engines, thereby keeping it clear of dirt, and to drive it at
considerable speed, while the road wheels travel at moderate speed, and are driven
together without cranks and coupling rods. For this purpose, I arrange the engine
and gear as indicated in the accompanying drawing. I make the boiler B, which
may be of the locomotive type, with the engine E placed horizontally on the top
of the barrel of the boiler, the crank shaft S being mounted in bearings on the
boiler, and extending across it. On either end of the shaft S I arrange a toothed
pinion P which can be connected to or disconnected from the shaft by a friction
clutch with this pinion P gears a wheel I which is free to revolve on a stud
axle A projecting from the side of the boiler; and this wheel I gears with toothed
wheels R one on each of two axles which carry road wheels W. Thus four road
wheels are driven from the engine shaft at a speed reduced in proportion as the
pinion P is to the wheels R. I prefer to connect the brake gear to the lever that
works the friction clutch above mentioned, so that, when the clutch is disengaged,
the brakes are put on. In order to keep the gearing always properly engaged,
I provide no springs between the body of the vehicle and the road wheels W, these
wheels being of a kind which have the springs within themselves. Instead of
employing a toothed pinion, an intermediate wheel and toothed wheels on the two
road axles, a pulley on the shaft driving pulleys on the road axles by suitable
straps may be used.
The intermediate toothed wheel I I in some cases make with a barrel con-
stituting a drum D on which a rope can be wound for the purpose of traction or
for hauling the vehicle itself up a severe gradient.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is :-
In tramway or other locomotives, driving both the axles of two pairs of road
wheels from an intermediate wheel driven by a pinion on the crank shaft of an
engine mounted on the top of the boiler, substantially as described.
Dated this 20th J
1000