Improvements in Thrust Bearings.
Year: 1896

page_text: Date of Application, 3rd Mar., 1896-Accepted, 11th Apr., 1896
COMPLETE SPECIFICATION.
Improvements in Thrust Bearings.
I, FRANK MOSSBERG, of Attleborough, County of Bristol, State of
Massachusetts, United States of America, Manufacturer, 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 that class of anti-friction bearings known as roller
bearings and particularly to those used as thrust bearings to remove the friction
where there is great pressure end ways of a shaft, as in the case of propeller shafts
and the like.
In the accompanying drawing
Figure 1 is a section of the roller bearing taken lengthways of the shaft through
its centre, with the shaft in elevation.
Figure 2 is a section through the middle transversely to the line of the shaft, with
the rolls in elevation.
Figure 3 shows a side view of the cage that holds the rolls.
Figure 4 is an edge view of the cage shown in Figure 3.
Figure 5 shows a side view of the ring that holds the rolls in the cage.
Figure 6 is an edge view of the ring seen in Figure 5.
Figure 7 is a face view of one of the steel washers that the rolls run on.
Figure 8 shows an edge view of the two steel washers in working position.
Figure 9 shows a modification of the outer end of the rolls.
Figure 10 is a side elevation of the cage, ring and rolls completed.
Figure 11 is a section taken longitudinally through the centre of the shaft and
cage on the line 1, 2, Figure 10.
Figure 12 is a section on the same line as Figure 11, of the cage only.
Figure 13 is a section of the cage on line 3, 4, Figure 10.
The following is the construction of the bearing. A is a portion of the shaft of
a propeller; B is a part of the box or bearing it turns in; C is a collar made fast
on the shaft A. Two hardened steel washers 3, s, made in halves and placed on the
shaft one against the box B, and the other against the collar C, to take the wear
off the rolls c.
The faces of these washers that are towards each other are made
on an incline to agree with the taper of the rolls c, c, the lines of two opposite sides
of which would meet in the centre of the shaft A. The cage b, is made in two
halves for convenience in putting it on the shaft. The two halves when placed
together in the same plane form a ring in which tapering holes o, o, are bored with
a tool large enough to cut through the metal on both sides of the cage except at the
flange o, and form bars between the holes with concave sides, to hold the rolls c, c.
The holes o, o are not bored clear through to the hole in the middle of the cage b,
but stop short so as to leave some metal at the bottom of the holes to hold the bars
of the cage together and a flange a', is made on both sides around the centre
opening and at the outer edge of the cage. A ring a, having its central opening of
the same diameter as the outside of the cage b, is made in two parts that are tenoned
together on opposite sides, and a taper key r, is put through the two parts of the
joint, with a screw nut n, on its smaller end to draw the key in and bring the parts
of the ring together. Sec Figures 5 and 6. The rolls e, are made tapering
as described above, so that their apices are at the centre of the shaft A, when in
working position, to insure a perfect rolling friction between then and the steel

page_text: washers, s, throughout the whole length of the rolls. The taper of the rolls c, and
the corresponding incline of the face of the washers a, causes a
slight thrust
ontward of the rolls, and to relieve the outer ends of the rolls of friction in rubbing
against the ring a, which friction would retard their turning freely, a set of balls i, i,
are placed in a recess in the outer end of each roll and the screws e, e, which are
received in the rings a, have grooves made around their inner ends for the balls to
run in.
As it is impossible to ensure perfect accuracy of all the parts so that the rolls c,
will always keep their best position, I make a concave recess e, Figure 8 in the face
of the washers, next the box 13, in which each roll in every revolution of the cage
will be free to right itself either by its own weight or assisted by a plug d,
and spring, in the outer ends of the rolls, see Figure 9, which are arranged to push
the rolls in slightly when free, in case the balls i are not used.
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 a roller bearing to receive the end thrust of shafts, a cage to hold the rolls,
consisting of a series of tapering radial bars having concave sides and a solid
connection between said bars at their inuer ends, tapering rolls fitted to turn
between said bars and means for holding said rolls in place, substantially as
described.
2. In a roller bearing for end thust of shafts, a cage to hold the rolls, consisting
of a series of tapering radial bars having a solid connection between said bare at
their inner ends, tapering rolls fitted to turn between said bars, a ring made in two
parts fitted to clamp on the outer ends of said bars to keep the rolls in place,
substantially as described.
3. In an end thrust roller bearing, a cage to hold the rolls constructed with
tapering radial bars having a solid connection between said bars at their inner ends,
a series of tapering rolls fitted to turn between said bare, hardened washers having
their inner faces bevelled to agree with the taper of said rolls and placed one each
side of the cage and rolls substantially as described.
4. In an end thrust roller bearing, a cage to hold the rolls coustructed with
tapering radial bars having a solid connection between snid bars at their inner ends,
tapering rolls fitted to turn hetween said bars, a ring made in two parts fitted to
clamp on the outer ends of said bars, screws fitted radially in said ring and having
their inner ends grooved or tapered, with balls placed between the ends of the rolls
and the inner ends of the screws, substantially as described.
5. In an end thrust roller bearing, a cage to hold the rolls constructed with
tapering radial bars having a solid connection between said bars at their inner ends,
a series of tapering rolls fitted to turn between said bars, substantially as
described.
Datod thin 2-11
1000
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.