An Improved Plummer Block.
Year: 1899

page_text: Date of Application, 10th July, 1899-Accepted, 3rd Mar., 1900
An Improved Plummer Block.
I, ALFRED EDMOND BURNOUF, of Bonnières; near Etréchy, Seine et Oise, in the
Republic of France, Builder, 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 object of the present invention is a plummer-block, the bearings of which
are composed of rollers supported by collars, the contact with the shaft being
effected and regulated by means of slit conical rings and having a crescent shaped
rib on the outside.
The application of my invention to a plummer-block with rollers is illustrated
by way of example in the accompanying drawings in which:-
Figure 1 is a vertical section of the plummer-block.
Figure 2 is a transverse section on the line ry of Figure 1.
Figure 3 is an axial section.
Figure 4 is a detail of the conical rings.
Figure 5 is a vertical section of the whole of the apparatus.
The transmission shaft A which may be either an axle, a trunnion, a pivot
or the like, is surrounded by rollers B. These rollers bave end pivots C which
engage in grooves D made in the divided collars E.
The rollers bear internally on the shaft and at their periphery they are supported
by means of' a divided ring M. This ring shown in Figure 4, is cylindrical in
its interior and bi-conical outside. The lateral cones F F have the same inclina-
tion and are separated by a rib G in the form of a crescent.
K and
These cones FF bear on two conical parts which are also divided themselves
into two portions, the one stationary H on the plummer-block and its cap
the other on a threaded ring L in two pieces which screws on the plummer-
block and its cap.
:
An aperture N in this threaded ring serves for inserting the shaft A when it
has been placed; a piece of wood or metal fills this aperture after the introduction
of the shaft and prevents the oil contained' in the bearing from coming out.
When the shaft has been placed in its plummer block, its rotation causes the
rollers to turn and the friction of the shaft sliding on the bearings being changed
into the rolling friction, the energy wasted is diminished.
Moreover the collars E are impelled in their turn by the rollers on the movable
shaft by which they are moved, and those on the cylindrical fixed part of the
ring M.
The mobility of the roller bearings decreases the waste of energy which results
in increased efficiency.
The characteristic point of my invention consists of the ring M, shewn in
Figure 4. This ring is cylindrical interiorally, which forms the surface on which
the rollers act. The exterior is formed of two truncated cones F F having their
bases turned towards each other and connected by means of the rib G.
This ring is in one or two pieces and their juncture is at an angle with regard
to the axle. The rib G is excentric and its thickness decreases to nothing at
the juncture 0. This crescent shape is for the purpose of giving elasticity to

page_text: these semi-circlets and of enabling them, when the threaded ring is screwed on,
to be regularly tightened by the adjustment of the cones and the raising of the
lower part and the lowering of the higher part.
The cones having the same inclination results in the axis being unaffected by
the adjustment, and consequently-the position of the shaft is invariable.
The tightening of the truncated cones forming the bearing can be obtained by
any other means than the ring above described; either by means of screws, keys
or the like.
I reserve the right of omitting the rollers and their collars, if necessary, so
as to obtain plummer-blocks with split bi-truncated bearings for the purpose of
assuring, in use,
the permanent position of the axis of rotation and thus preventing
ts! bevou
all jolting.
Having (now particularly described and ascertained--the nature of my said
invention and-in-what manner the sanie is to be performed I declare that what
I claim is:-
Fabi-truncated
1. A plummer-block with roller bearings characterised by having a
cone in one or two pieces with a rib in the shape of a crescent genabling a
concentric tightening and thus maintaining the axle in its proper position and
keeping it there permanently.
:
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2. The bi-truncated split ring, regulatable as desired by means of screws,
bolts, collars or, the like, in, order to assure the permanence of the position of
the axis of rotation, the raising of the lower part being equal to the lowering and
the higher portion.
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:
3. The application of the ring set forth in Claim 2, to plummer-blocks with
smooth, or roller bearings, substantially as described.
.