IMPROVEMENTS IN THRUST JOURNALS OF PROPELLER SHAFTS to be as follows, that is to say
Year: 1885

page_text: PROVISIONAL SPECIFICATION.
We, JOHN THOMSON, and JAMES MACINTYRE THOMSON, of Finnieston Engine
Works, Glasgow, in the County of Lanark, North Britain, Engineers, do hereby
declare the nature of our said invention for "IMPROVEMENTS IN THRUST JOURNALS
OF PROPELLER SHAFTS to be as follows, that is to say:-
"
"
"
Our said Invention has for its object the formation of thrust journals of
propeller shafts in an improved manner.
;
It has been the practice to form such a journal by forging an enlargement on the
shaft and subsequently turning down the enlargement so as to form the thrust
collars; and in these operations not only is there increased risk of unsoundness
owing to the enlarged size, but the turning process also removes a large portion of
the outer and soundër metal.
In carrying out our Invention we forge and turn the journal part so as to be
about the same size as the rest of the sliaft, and on the outside of such journal part
we fit a shell having the thrust collars formed upon it. This collared shell or
thrust piece may in some cases be in a single piece into, which the shaft is passed,
and which is secured in its place between collars one of which may be formed on
the sliaft the other being shrink on or otherwise fixed afterwards; but in most
cases the thrust piece will be made in two or more pieces so that it can be got into
its place between collars formed on the shaft, the two or more pieces being bolted
together by means of lugs or flanges, or being fixed by means of rings shrunk ön
their end collars.
The collars of the thrust piece may be shaped to suit the "horse-shoe" type of
thrust bearing or any other bearing; and when it is wished to change a thrust
bearing of the older kind to one of the "horse-shoe" type, the small collars of the
old journal'inay be turned off the shaft and a thrüst piece of our improved kind
may be applied in its place.
The improved thrust piece is intended to be made of cast steel or of any other
suitable metal or alloy:

page_text: COMPLETE SPECIFICATION.
We, JOHN THOMSON and JAMES MACINTYRE THOMSON of Finnieston Engine
Works, Glasgow, in the County of Lanark, North Britain, Engineers, do hereby
declare the nature of our said invention for "IMPROVEMENTS IN THRUST JOURNALS
OF PROPELLER SHAFTS" and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement, that is to
say:-
Our said Invention has for its object the formation of thrust journals of
propeller shafts in an improved manner. It has been the practice to form such a
journal by forging an enlargement on the shaft and subsequently turning down the
enlargement so as to form the thrust collars; and in these, operations not only is
there increased risk of unsoundness owing to the enlarged size, but the turning
process also removes a large portion of the outer and sounder metal.
In carrying out our Invention we forge and turn the journal part so as to be of
about the same size as the rest of the shaft, and on the outside of such journal part
we fit a shell having the thrust collars formed upon it. This collared shell or
thrust piece may in some cases be in a single piece into which the shaft is passed,
and which is secured in its place between collars one of which may be formed on
the shaft the other being shrunk on or otherwise fixed afterwards; but in most
cases the thrust piece will be made in two or more pieces so that it can be got into
its place between collars formed on the shaft, the two or more pieces being bolted
together by means of lugs or flanges, or being fixed by means of rings shrunk on
their end collars.
The collars of the thrust piece may be shaped to suit the "horse-shoe" type of
thrust bearing or any other bearing; and when it is wished to change a thrust
bearing of the older kind to one of the "horse-shoe" type, the small collars of the
old journal may be turned off the shaft and a thrust piece of our improved kind
may be applied in its place.
The improved thrust piece is intended to be made of cast steel or of any other
suitable metal or alloy.
And in order that our said Invention and the manner of performing the same
may be properly understood we hereunto append a sheet of explanatory drawings
to be hereinafter referred to and representing our improved thrust journal in the
form in which we believe it will be most generally applied.
Figure, 1, of the accompanying drawings is a side elevation showing our
thrust-journal shell as fixed on a propeller shaft. Figure, 2, is an end elevation of
the thrust-journal shell, and figure, 3, is a plan showing the shaft with one half of
the thrust-journal shell removed.
In the example shown in the drawings the propeller shaft, S, is formed with two
collars, c, the part of the shaft between these collars being of the same diameter as
the rest of the shaft. The thrust-journal shell, J, is made in two halves to allow
of its being got into its place between the shaft collars, c; and the two half shells
are formed with lugs, L, by means of which they are bolted together after being
placed on the shaft. Keys may be introduced as indicated by dotted lines at, K,

page_text: to insure that the thrust journal shell, J, will rotate with the shaft, S, The
thrust-journal shell, J, is formed with the usual collars, c.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed, we declare that
what we claim is
The improved thrust-journal for propeller shafts and consisting of a shell in
one or more pieces fixed or placed on the shaft substantially as herein before
described.
EDMUND HUNT,
Applicants' Agent.