Improvements in and connected with Rapidly Rotating Shafts for Rendering Bodies Mounted thereon Self-balancing or Self- adjusting.
Year: 1892

page_text: COMPLETE SPECIFICATION.
Improvements in and connected with Rapidly Rotating Shafts for
Rendering Bodies Mounted thereon Self-balancing or Self-
adjusting.
1, CARL GUSTAF PATRIK DE LAVAL of No 16 Handtverkaregatan Stockholm.
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 :-
The invention consists of an improved arrangement for reducing to a minimum the
reactions on the bearings by rapidly rotating bodies, arising from their imperfect
balancing. This is accomplished by fixing the rotating body either directly or
indirectly on a tube or sleeve which is fixed on and around a shaft, which tube is
made elastic or yielding in some suitable manner so that the rotating body is
rendered self-adjusting or self-balancing.
In the accompanying drawings I have shown two constructions of this arrange-.
ment:
Fig. 1 being a part sectional elevation of one construction and
Fig. 2 a like view of another construction.
Fig. 3 is a transverse sectional view on the line c d of Fig. 2 and
Fig. 4 a transverse sectional view on the line ab of Fig. 2.
Similar letters of reference indicate corresponding parts.
In Fig. 1, the body A is fixed on the boss B which again is made fast upon the
central part of the tube or sleeve C the latter being fastened at both ends D and E
to the shaft F. This shaft is shewn supported at each end in bearings G and H in
the usual way and the motion is imparted to the system by means of a driving
pulley K. A portion of the shaft F, between D and E has been turned down, thus
leaving an annular space between the tube C and the shaft F. A helical slit / is
cut in the tube C between its central portion and each end so that the central
portion occupied by the body A may, while rotating assume such position relative
to shaft F as may be required to secure an even rotation which saves wear and tear
in the bearings.
In Fig. 2 where the body A is directly fixed upon the thicker central portion of
the tube or sleeve C this tube is made elastic or yielding as required either by
turning down the tube until its thickness is considerably reduced (see Fig. 4) or
the tube, being somewhat thicker (see Fig. 3) is provided with longitudinal slits a
by means of which the required elasticity is obtained.
The bearings for the ends G and H of the shaft have in the present cases been
shown fixed. In some instances however it may be desirable that these also should
be able to yield to a slight extent. In such cases Seller's bearings should be used,
pivotted bearings, or bearings surrounded with india-rubber rings like the top
bearing of my cream separators. Other constructions of self-adjusting bearings
may also be used to give the requisite adjustment.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The combination, with a rapidly rotating body and its shaft, having fixed or
self-adjusting bearings, of a tube or sleeve surrounding the shaft and fixed to it at
one or both ends, the tube carrying directly or indirectly the rotating body and
having one or more suitable slits for producing elasticity whereby the rotating
body is rendered self-adjusting or self-balancing substantially as set forth.
2. The combination, with a rapidly rotating body and its shaft, having fixed or

page_text: self-adjusting bearings of a tube or sleeve surrounding the shaft and fixed to it at
one or both ends, the tube carrying directly or indirectly the rotating body and
having longitudinal slits, for producing elasticity, whereby the rotating body is
rendered self-balancing or self-adjusting substantially as set forth.
3. The combination with a rapidly rotating body and its shaft having fixed or
self-adjusting bearings, of a tube or sleeve surrounding the shaft and fixed to it at
one or both ends, the tube carrying the rotating body directly or indirectly and
being turned down to such an extent as to produce elasticity whereby the rotating
body is rendered self-balancing or self-adjusting, substantially as described.
Dated this 11th day of March 1892.
JENSEN & SON,
77, Chaucery Lane, Agents.