Improvements in the Mounting of Flywheels and other Heavy Bodies on Engine Shafts and the like.
Year: 1893

page_text: Date of Application, 7th Mar., 1893-Accepted, 20th May, 1893
COMPLETE SPECIFICATION.
Improvements in the Mounting of Flywheels and other Heavy
Bodies on Engine Shafts and the like.
I, EBERHARD SEGER, of Kammakaregatan 40, Stockholm, in the Kingdom of
Sweden, 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 :-
This invention relates to an arrangement for preventing the vibrations and
breakages, which are continually arising in the bearings of rapidly revolving shafts,
or in other words an arrangement for giving the revolving body, attached to such
a shaft, a quiet and regular movement. This can be attained by an arrangement,
which permits the centre of gravity of the revolving body to coincide with the
axis of revolution and the plane of revolution of the body to adjust itself at right
angles to the axis of revolution as well as to the shaft of the engine.
In the accompanying drawing:-
Figure 1 is a horizontal section showing one arrangement of my invention, and
Figure 2 shows a modification thereof.
The outer-end of the main shaft d, resting in the socket e is hollow, and the
revolving body a is not placed on this shaft but on the projecting end of a spring
bar c which is surrounded by the hollow part of the shaft to which shaft the rear
end of the spring bar is firmly fastened. The bar c may, as shown in Figure 2,
also be provided with a support fitting into the inside of the shaft, which
support allows of the bar being moved, and behind which support the bar may
be made more slender; its end being fastened into the shaft. It is evident that
this arrangement permits the revolving body to adjust itself during its rotation
in such a way, that it can revolve around its own centre of gravity.
In order to make it possible for the plane of revolution of the said body to
adjust itself at right angles to the axis of revolution as well as to the main shaft,
the body is placed upon a ball b on the bar c, which ball rests in a socket in the
revolving body and is held in position either by a screw g (Figure 1) or by a
screw and a spring (Figure 2). This arrangement permits the revolving body to
turn a little around the ball, so that it may adjust itself at right angles to the axis
of revolution. Besides this the arrangement works as a safety device, in case a
violent resistance should arise against the revolution of the main shaft; for in such
a case the revolving body continues its rotation (although with a decreasing
velocity) around the ball b, whereby the engine coupled to the shaft is not exposed
to any risk of breakage.
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. The improved arrangement for mounting flywheels or other heavy bodies
on rapidly revolving shafts at their outer ends consisting in forming one end of
the shaft which rests in a socket or bearing e, hollow, so that it embraces a spring
bar c, the inner end of which is fastened to the shaft and the outer end of which
projects beyond the shaft and supports the revolving body, substantially as herein-
before described and shown in the drawing.
2 The combination with the arrangement above described, a support f on the

page_text: spring bar in the shaft, which support permits the fore part of this bar to bend,
substantially as described and shown in the drawing.
Dated this 7th day of March 1893.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.