Improvements in Spring Mounted Traction or Self-moving Engines.
Year: 1898

page_text: Date of Application, 29th Jan., 1898
Complete Specification Left, 28th Oct., 1898-Accepted, 3rd Dec., 1898
PROVISIONAL SPECIFICATION.
Improvements in Spring Mounted Traction or Self-moving Engines.
I, JAMES MARSHALL, of Britannia Iron Works, Gainsborough, in the County
of Lincoln, Engineer, do hereby declare the nature of this invention to be as
follows;-
The object of my invention is to provide an improved method of supporting
self moving engines on springs and is applicable to traction road locomotive
or tramway engines in which the motion is transmitted to the travelling wheels
from the engine crank shaft by gear wheels.
According to my invention, the main axle boxes are arranged to slide vertically
and the engine is slung from the said axle boxes by means of bolts and springs
(preferably spiral springs) and to prevent the axle boxes sliding unequally I
connect them by means of balance levers so arranged that the springs on each side
of the engine are compressed equally and the axle when moving vertically is
kept parallel with the horizontal centre line of the engine. Each of the said
levers is supported at its centre upon a fulcrum attached to the engine, the inner
ends being jointed together, the outer ends being jointed to the axle boxes. To
provide for the vertical movement of the gear wheel attached to the main axle, I
arrange the intermediate gearing between it and the crank-shaft in such a manner
that the pinion driving the spur wheel on the axle moves vertically with the latter
whilst the spur wheel which receives its motion from the pinion on the crank-
shaft rotates on a fixed bearing, the main axle box on the gearing side of the
engine being connected to the bearing of the intermediate shaft by a link and
joint pins the opposite end of the said shaft being carried in a trunnion or other
self adjusting bearing. I provide a flexible connection between the spur wheel
and the pinion of the intermediate shaft consisting of arms or projections on the
back of the pinion which arms or projections receive pins which are connected by
links to springs secured to the body of the spur wheel.
221
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T
1000
Improvements in Spring Mounted Traction or Self-moving Engines.
I, JAMES MARSHALL, of Britannia Iron Works, Gainsborough, in the County
of Lincoln, Engineer, do hereby declare the nature of this invention and in what
Paine 8d1

page_text: manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:-
-
The object of my invention is to provide an improved method of supporting
self-moving engines on springs, and is applicable to traction, road, locomotive,
or tramway, engines, in which the motion is transmitted to the travelling wheels 5
from the engine crank-shaft by gear-wheels.
According to my invention, the main axle boxes are arranged to slide vertically
and the engine is slung from the said axle boxes by means of bolts and springs
(preferably spiral springs) and to prevent the axle-boxes sliding unequally "I
connect them by means of balance levers so arranged that the springs on each side 1
of the engine are compressed equally and the axle, when moving vertically, is
kept parallel with the horizontal centre line of the engine. Figure 1 of the
accompanying drawing shews in vertical section, and Figure 2 in sectional plan,
an arrangement according to my invention. Each of the said balance-levers (A),
is supported, at its centre, upon a fulcrum B, attached to the engine by the horn 1
plates b, the inner ends being jointed together by the pin C, the outer ends being
jointed to the projections d, from the axle boxes D, by the pins E, which support
the hangers F, carrying the plates G, between which, and the recesses h, carried by
the horn plates b, the springs i, are situated. To provide for the vertical move-
ment of the gear wheel J, attached to the main axle K, I arrange the intermediate 2
gearing, between it and the crank shaft, in such a manner that the pinion driving
the spur wheel on the axle, neves vertically with the latter, whilst the spur
wheel M, which receives its motion from the pinion on the crank-shaft, rotates on
a fixed bearing m, the main axle box on the gearing side of the engine being
connected to the bearing of the intermediate shaft by a link n, and joint pins n³, 2
the opposite end of the said shaft being carried in a trunnion, or other self-adjust-
ing, bearing, P. I provide a flexible connection between the spur wheel M,
and the pinion L, on the intermediate shaft, as shewn, in section, in Figure 1,
and in elevation, in two modifications, in Figures 3 and 4. The said connection
consists of arms, or projections, 1, (one being shewn broken away in Figure 3) 3
on the back of the pinion L, which arms, or projections, receive pins 2, which are
connected by links q, to springs m³, secured to the body of the spur wheel M.
In Figure 3 the springs are shewn as blade springs. In Figure 4 they aro
shewn as spiral springs, the links q, being replaced by rods q³, carrying
pieces ³, between which, and the projections r, from the wheel M. the springs m² 2
ure situated.
Having now particularly desonibed and
ure situated.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
1. In spring mounted traction, or self-moving, engines, the combination, with 40
main axle boxes capable of sliding vertically, of bolts, or hangers, and springs,
and balance levers, arranged and combined substantially as, and for the purpose,
herein before described and illustrated in Figures 1 and 2 of the accompanying
drawings.
2. In combination with the gearing wheels (such as M and L), of traction, or 45
self-moving, engines, of spring yielding connections, such as are hereinbefore
described, and illustrated in Figures 1, 3 and 4 of the accompanying drawings.
Dated this 28th day of October 1898.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.