Improvements in Driving and Compensating Gear for Traction Engines or similar Heavy Road Vehicles.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Driving and Compensating Gear for Traction
Engines or similar Heavy Road Vehicles.
I, WATSON FOGGO, of Anna Valley, Andover, in the County of Hampshire,
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to the arrangement and operation of the driving and
driven spur or other wheels, so that the working centres remain unaltered by
any disturbance caused by inequalities of the road, being compensated by the
main travelling wheels and their shaft being so mounted that squares, on the
shaft and wheel naves respectively, work freely in square rings which in turn
work freely in square recesses so that at every point in their revolution vertical
play is allowed; to a more reliable adjusting action of the springs upon which
the engine is mounted and to other minor improvements.
The 1st and 2nd motion shafts may be arranged as usual, but the road travelling
shaft and wheels are entirely independent of both so as to prevent any disturbance
of the true centres of the driving spur wheels and thereby ensure the teeth
being always in true gear. The road travelling wheels shaft, at one end, has
formed upon it a square part sliding freely in one direction in a square ring
which, in its turn, works freely in the opposite direction in a square cavity in
the nave of an inner bevil wheel. The road travelling wheel at this end has
a square projection from its nave, which slides freely in one direction in a square
ring, carrying the nave of an outer bevil wheel, in which is a square recess
sliding freely in the opposite direction on the square ring and driven from the
2nd motion shaft by bevil pinions between the two bevil wheels, and revolving
in their orbits. The naves of these inner and outer bevil wheels revolve upon
a sleeve, formed upon or bolted to the main frame, within which the road wheel
shaft revolves and an oil reservoir is provided around this sleeve from which
oil is supplied to the naves of the inner and outer bevil wheels, as they revolve
upon it.
The opposite end road wheel is driven by a collar on a feather key let into
the shaft and, engaging with a projection on the nave, is secured thereto by a
bolt which, when withdrawn, disconnects the shaft from the wheel, as when
the engine is required for hauling or winding work.
The springs are carried in cases the jaws of which take hold of and work
freely on the projecting studs of a "trunnion" fitting around the travelling
wheel shaft, upon the top of which fitting the springs abut, and provision
is made for adjusting the compression of the springs by a wedge key actuated
by a screw or other device.
A further improvement consists in fitting coiled springs between collars at
each end of the travelling wheel axle to take up play or shock caused by end
wear.
A drum sheave for hauling or winding is formed upon or fitted to the side
of the spur wheel into which the 2nd motion pinion works, and through which

page_text: the whole of the driving power of the engine is transmitted and, when required,
the gear which drives the travelling wheels is disconnected at both ends so that
the hauling drum only is operated direct from the 2nd motion shaft the travelling
wheels remaining stationary.
كريم
1
1000
Improvements in Driving and Compensating Gear for Traction
Engines or similar Heavy Road Vehicles.
I, WATSON FOGGO, of Anna Valley, Andover, in the County of Hampshire,
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 the arrangement and operation of the driving and
driven spur or other wheels, so that the working centres remain unaltered by
any disturbances caused by inequalities of the road, being compensated by the
main travelling wheels and their shafts being so mounted that squares, on the
shaft and wheel naves respectively, work freely in square rings which in turn
work freely in square recesses so formed so that at every point in their revolution
vertical play is allowed; to a more reliable adjusting action of the springs upon
which the engine is mounted and to other minor improvements.
The 1st and 2nd motion shafts may be arranged as usual, but the road travelling
shaft and wheels are entirely independent of both so as to prevent any disturbance
of the true centres of the driving spur wheels and thereby ensure the teeth
being always in true gear. The road travelling wheels shaft, at one end, has
formed upon it a square part sliding freely in one direction in a square ring
which, in its turn, works freely in the opposite direction in a square cavity in
the nave of an inner bevil wheel. The road travelling wheel at this end has
a square projection from its nave, which slides freely in one direction in a square
ring, carrying the nave of an outer bevil wheel, in which is a square recess
sliding freely in the opposite direction on a square ring and driven from the
2nd motion shaft by bevil pinions between two bevil wheels and revolving
in their orbits. The naves of these inner and outer bevil wheels revolve upon
a sleeve, formed upon or bolted to the main frame, within which the road wheel
shaft revolves and an oil reservoir is provided around this sleeve from which
oil is supplied to the naves of the inner and outer bevil wheels, as they revolve
upon it.
The opposite end road wheel is driven by a collar on a feather key let into
the shaft and, engaging with a projection on the nave, is secured thereto by a
bolt which, when withdrawn, disconnects the shaft from the wheel, as when
the engine is required for hauling or winding work.
The springs are carried in cases the jaws of which take hold of and work
freely on the projecting studs of a "trunnion"
wheel shaft, upon the top of which fitting the springs abut, and provision
fitting around the travelling
is made for adjusting the compression of the springs by a wedge key actuated
by a screw or other device.

page_text: A further improvement consists in fitting coiled springs between collars at
each end of the travelling wheel axle to take up play or shock caused by end
wear.
A drum sheave for hauling or winding is formed upon or fitted to the side
of the spur wheel into which the 2nd motion pinion works, and through which
the whole of the driving power of the engine is transmitted and, when required,
the gear which drives the travelling wheels is disconnected at both ends so that
the hauling drum only is operated direct from the 2nd motion shaft, the travelling
wheels remaining stationary.
Fig. 1 is a general cross sectional elevation.
Fig. 2 is a section on line A. B.
Fig. 3 is a section on line C D.
Fig. 4 is a sectional elevation showing the application to the second motion
shaft E¹.
Fig. 5 is end view of Fig. 4.
Fig. 6 shows a modified arrangement.
E is the main road wheel shaft or axle on which is formed at one end the
square M which works freely in one direction in the square or rectangular ring F,
the ring F in turn is made to work freely in another direction at right angles
or in the opposite direction in the square recess or cavity O formed in the nave
or boss G of the inner bevil wheel P, this inner bevil wheel Prevolves on the
sleeve Q which is securely fixed to the boiler frame or hornplate, thus the main
road axle E is freely allowed to move vertically in its guides without any altera-
tion in the true centres of the gearing in any part of their revolution, the inside
diameter of the sleeve Q is sufficiently large to allow the necessary movement
of main road axle E.
On the main road wheel N is formed the square projection I which slides
freely in one direction in the square or rectangular ring H, which in its turn
slides freely in the opposite direction or in a direction at right angles in the
square recess S formed in the nave J of the outer bevil wheel R, the outer bevil
wheel R is allowed to rotate freely on the nave G of the inner bevil wheel P,
thus the true centres of all the gear wheels are held in correct position while the '
free and independent vertical movement is allowed for the main road wheels
and axle due to the compression or extension of the springs T caused by the
inequalities of the road.
The driving squares
and M on the main road wheel N and axle E respectively,
and the square recesses S and 0 in the outer and inner bevil wheels R and P
respectively may be made of rectangular form to suit circumstances.
When my invention is applied to the 2nd motion shaft as shown in Figs. 4
and 5 it is then dispensed with on the main travelling or road wheel N and
shaft E, and the inner and outer bevil wheels 1 and R respectively are fixed
and arranged in the usual way.
In Figs. 4 and 5 a square or rectangular form M¹ is either keyed to or forged
on one end of the second motion shaft E which is made to slide freely in a
square or rectangular ring F, and this ring F on the outside is made to slide
freely in a direction at right angles, to which the square M¹ slides, in a square
or rectangular recess or cavity G¹ formed on the second motion spurwheel U,
the spurwheel U is made to run on a sleeve V which is fixed to the engine or
boiler frame so as to keep the true centres of the 1st and 2nd motion spurwheels
in a fixed position, the second motion shaft E' being allowed to slide freely
vertically in the sleeve V.
When my invention is used on the second motion shaft it is necessary to
couple the main road shaft E and the second motion shaft E¹ together by means
of links W on either or both sides of the engine, by this means the two shafts E
and E are held rigdly to a fixed distance to suit the gearing employed, and
allowed to slide vertically as the springs T are compressed or extended, by this
arrangement my invention may be termed a movable, sliding, or compensating

page_text: coupling between the spurwheel U and the second motion shaft E¹, the springs
in this arrangement are preferably placed underneath the bearings on shaft E
instead of on the top as shown on the accompanying drawings in Fig. 1.
Fig. 6 shows a modification which I sometimes adopt to save room when it is
required to use a smaller spurwheel U, referring to Fig. 6 it will be seen I form
pockets on the spurwheel U on either side of the shaft E' into which engage
the projections Y which are made to slide freely in the said pockets X, the
projections Y are forged or cast in one with the square or rectangular ring F,
but to suit circumstances the projections Y may be separate pieces and attached
to the square rings F by means of bolts or other suitable device.
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:
1st. Mechanism employed in spring mounted traction engines and similar
road vehicles to allow free vertical movement of the main road shaft and wheels
without causing disturbance in the true centres of the gearing substantially as
described.
2nd. Mechanism employed in spring mounted traction engines and similar
road vehicles to allow free vertical movement of the main road shaft and wheels
and the main spurwheel, and the compensating bevil wheels being run on a
sleeve fixed to the boiler or engine frame and thus retain the gearing in their
true and fixed centres.
3rd. Mechanism employed in spring mounted traction engines and similar
road vehicles to form a sliding coupling between the main road shaft and wheels
and the spur and bevil wheel gearing without alteration of the true centres of
the gearing in any part of their revolution, at the same time allowing a free
vertical movement of the main road wheels and axle.
4th. Mechanism employed in spring mounted traction engines and similar
road vehicles applied to the second motion shaft in three shaft engines; and
the third motion shaft in four shaft engines, to form a sliding, moveable, or
compensating coupling between the said shafts and spurwheels for driving same,
which spurwheel is run on a sleeve fixed to the boiler or engine frame and free
vertical movement allowed to the said shafts in their guides and the true and
fixed centres of the gearing retained substantially as described.
5th. A spring mounted traction engine or other similar road vehicle con-
structed, operating and having the purposes substantially as herein before
described and shown in the accompanying drawings.
Dated this 3rd day of June 1800.