Improvements in Dust Guards for Protecting the Bearings of Shafting and the like.
Year: 1899

page_text: Improvements in Dust Guards for Protecting the Bearings of
Shafting and the like.
I, ALBERT DAVIDSON, 139, Norfolk Street, City of Sheffield, Engineer, do hereby
declare the nature of my invention to be as follows:-
-
My invention has for its object to prevent the entrance of grit, dust, and
the like into the bearings and necks of shafting, axles, spindles and the like,
particularly the bearings of high speed machinery, such as dynamos, buffing
lathes and others.
In applying. my invention to a selfoiling bearing for example, I construct the
body and cap which carry and enclose the brasses and the oiling appliance, with
end walls projecting a short distance beyond the ends of the brasses and thus
forming a narrow additional oil chamber communicating with the central one.
These end walls when the cap is in position have circular openings through
which the shaft passes, but of much larger diameter than the shaft, and close this
annular space round the shaft by means of a metal ring preferably made in
halves.
The outer periphery is flanged to fit on both sides of the end wall, and its
inner face is grooved to receive a ring of rubber, or other elastic or suitable
material which will fit closely upon the shaft and thus prevent the passage of
dirt, or dust which may settle upon the shaft, or which may be floating in the
air.
Within the narrow chamber, or between the ends of the brasses and the guard
rings I twist a bit of wire round the shaft, which causes the lubricant travelling
on the shaft to accumulate there and drop into the oil chamber, thus stopping
it from coming in contact with the rubber ring.
Two or more rings of rubber or the like may be used if desired, and a draw
off plug or tap may be used to regulate the depth of the lubricant.
Dated the 5th day of May 1890
Improvements in Dust Guards for Protecting the Bearings of
Shafting and the like.
I, ALBERT DAVIDSON, 139, Norfolk Street, City of Sheffield, Engineer, do hereby
leclare the nature of this invention and in what manner the same is to be per-
Price 77

page_text: formed, to be particularly described and ascertained in and by the following
statement:-
-
My invention has for its object to prevent the entrance of grit, dust and
other dirt into the brasses and necks of pedestals and like supports of shaping,
axles and similar revolving parts of machinery and particularly those of dynamos
and of other high speed machinery.
The invention is illustrated as applied to a selfoiling pedestal or bearing in
the annexed drawings, in which :-
Fig. 1, is a transverse sectional elevation of a self-oiling bearing constructed
with my improved dust guards.
Fig. 2, front view of the divided collar with the guard ring of rubber, asbestos,
or other suitable material or metal.
Fig. 3, vertical section through same.
In carrying out my invention as shown in the drawings for example, I construct
the body A, and its cap B, to enclose and support the top and bottom brasses
marked C, and a selfacting oiling ring D, which is placed loosely upon the
shaft with its lower part submerged in the lubricant.
On each side of the bearing or pedestal I construct projecting side walls E,
which extend a short distance beyond the ends of the brasses C, and form
additional narrow oil chambers N, communicating with the central oil chamber O,
by passages which are indicated by dotted lines.
When the cap B, is in position upon the body A, of the pedestal, the end walls E;
have a circular opening through them for the passage of the shaft, the openings
being of larger diameter than the shaft, and I close this annular space by means
of a divided metal collar R, which carries a ring F, of rubber, asbestos or other
like material or of antifriction metal & of any suitable form in its cross section.
The collar R, is preferably made with a double flange to fit upon both sides
of the end wall E, and its inner peripheral face is grooved to retain the ring 1,
which fits closely upon and encircles the shaft S, thus preventing the passage of
dirt and the like into the interior of the pedestal, reducing wear and tear from
friction and avoiding heated necks.
W, seen in Fig. 1, is a simple coil of wire twisted round the shaft, and forms a
stop to any of the lubricating oil which may travel along the shaft, causing it to
accumulate and eventually to drop into the oil chamber, instead of coming into
contact with the ring F, which in the case of a rubber ring would be detrimental.
Two or even more of these rings F, may be used at each end instead of one
as shown, and a draw off tap or a plug P, may be used to regulate the depth of
the oil within the oil chambers. Stop pieces G, upon the brasses are used to
prevent either longitudinal or rotary movement.
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:
1. The method of and means for preventing the entrance of dirt or dust into
the bearings of shafts, axles, and the like substantially as hereinbefore described
and shown.
2. In connection with a pedestal or other like bearing for shafts or axles, the
arrangement of an outer wall E, upon one or both sides thereof, supporting a
divided collar R, provided with a guard ring F, fitting closely round the shaft,
or other axle S, for the purpose specified, and as hereinbefore described, and as
illustrated.
ROBT. F. DRURY, C.P.A.,
Agent for Applicant, Bank Buildings, George Street, Sheffield.