Improvements connected with "Thrust Block" Bearings of Screw Propeller and other Shafts.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements connected with "Thrust Block" Bearings of Screw
Propeller and other Shafts.
I, CAESAR HASS, of 261, Burdett Road, Limehouse, London, Director, do hereby
declare the nature of this invention to be as follows;
of a
This invention relates to certain improvements in "thrust block" bearings,
the object being that by means of cone shape rollers in suitable casings and
abutting springs which act for both fore and aft motion of the shaft, say,
vessel, friction is considerably reduced, and the running of the shaft made more
easy than at present.
For the purposes of my invention, I employ a series of sets of cone shaped rollers
in duplicate for fore and aft action of the shaft. These cone shaped rollers have
their ends made parallel, the larger ends being located in holes of a ring which
has a series of legs radially arranged and forming part of an outer ring which
receives the smaller parallel ends of the cone rollers. The end faces of the larger
ends of the cone shaped rollers are tapered from the centre and have holes in them
for pins projecting from spring carrying ferrules, so that one can rotate with the
other, said ferrules being otherwise held in position by a band which is preferably
in halves for easy renewal in cases of repair, or otherwise. The spring contained
sockets or ferrules slide on or within one another for separate action.
The shaft has a couple of inclined blocks on it with the faces reversed to cach
other for the cone rollers to bear upon and outside the rollers, they are held in
position by the bearers which are secured to the framing or other part of the
vessel, or structure said bearers being surmounted by caps bolted thereto.
By this invention, the appliances being in duplicate and in reverse order, the
thrust of the bearers on the conc rollers when the shaft has its end on motion
in one direction, causes the rollers at opposite end to move circularwise and end
on simultaneously towards the other set, and in so doing, press against their ferrules
and compress the springs within, which springs by their connection with the
other ferrule cause the opposite set of cone-rollers to move end on in the reverse
direction and so put them into contact with their bearer on the shaft in addition
to the contact which the other set have on their bearer, so that the actual thrust
is taken up at two distinct parts of the shaft and the strain usually put upon it
from one part only obviated.
In an ordinary thrust bearing where the pressure is always one way, only half
the bearing is necessary and then the large end of the conical rollers bear against
an extending shoulder of the inner and sometimes also of the outer cone block.
1000
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Caesar Hass,

page_text: Improvements connected with "Thrust Block" Bearings of Screw
Propeller and other Shafts.
I, CAESAR Hass, of 261, Burdett Road, Limehouse, London, Director, 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 certain improvements in "thrust block" bearings,
the object being that by means of cone shape rollers in suitable casings and
abutting springs which act for both fore and aft motion of the shaft, say, of a
vessel, friction is considerably reduced, and the running of the shaft made more
easy than at present.
For the purposes of my invention and as represented on the annexed drawings,
Figures 1, 2, 3, and 4, which are respectively part section side elevation, end
elevation, side elevation, and sectional end view, I employ a series of sets of cone
shaped rollers A, A, in duplicate for fore and aft action of the shaft B. These
cone shaped rollers A, A, have their ends C, C made parallel, the larger ends C
being located in holes of a ring D which has a series of legs E, E, radially
arranged and forming part of an outer ring I which receives the smaller parallel
ends of the cone rollers A. The end faces of the larger ends C of the cone shaped
rollers A are tapered from the centre and have holes in them for pins G projecting
from spring carrying ferrules H, H, so that one can rotate with the other, said
ferrules H, H, being otherwise held in position by a band I which is preferably
in halves for easy renewal in cases of repair or otherwise.
The springs J, J, contained in sockets or ferrules H are so arranged that the
ferrules slide on or within one another for separate action as indicated.
The shaft B has a couple of inclined surfaces B, B1, on it with the faces reversed
to each other for carrying the blocks K, K, on which the cone rollers A bear upon
and outside the rollers, they are held in position by the bearers L, L, which are
secured to the framing M or other part of the vessel, or structure, said bearers
being surmounted by caps bolted thereto.
By this invention, the appliances, as at Figure 1, being in duplicate and in
reverse order, the thrust of the blocks K, K, on the cone rollers A when the
shaft B has its end on motion in one direction, causes the rollers A at opposite
end to move circularwise and end on simultaneously towards the other set, and
in so doing, press against their ferrules H, H, and compress the springs J within,
which springs J by their connection with the other ferrule cause the opposite
set of cone rollers A to move end on in the reverse direction and so put them into
contact with their blocks and bearer on the shaft in addition to the contact which
the other set have on their blocks and bearer, so that the actual thrust is taken
up at two distinct parts of the shaft and the strain usually put upon it from one
part only obviated."
In an ordinary thrust bearing where the pressure is always one way, only half
the bearing is necessary and then the large end of the conical rollers bear against
an extending shoulder of the inner and sometimes also of the outer cone block.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I claim
is:
1. The combination of appliances shown on the annexed drawings consisting of
cone allo A in cots
4

page_text: stays E, said rollers A. bearing and having rotation in contact with block K
the bearer L and held thereto by springs J in sliding ferrules H, as described for
the purposes explained.
2. In or to an apparatus for absorbing and utilising the thrust of a propeller
shaft, fitting one or more conical blocks K, thereon against the cone face or faces
of which cone shaped rollers A set at an angle and held in position by end
rings D, F, and stays E, E, as described and substantially as represented.
The 2nd day of May 1899.
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Caesar Hass.