IMPROVEMENTS IN AND RELATING TO STEAM PIPES & CONNECTIONS FOR DREDGER & OTHER CRANES."
Year: 1881

page_text: LETTERS PATENT to William Dent Priestman and Samuel Priestman, both of
Kingston-upon-Hull, in the County of York, Engineers, for an Invention of
"IMPROVEMENTS IN AND RELATING TO STEAM PIPES & CONNECTIONS FOR
DREDGER & OTHER CRANES."
PROVISIONAL SPECIFICATION left by the said William Dent Priestinan
and Samuel Priestman' at the Office of the Commissioners of Patents on the
23rd August 1881.
WILLIAM DENT PRIESTMAN and SAMUEL PRIESTMAN, both of Kingston-upon-
Hull, in the County of York, Engineers. "IMPROVEMENTS IN AND RELATING
TO STEAM PIPES & CONNECTIONS FOR DREDGER & OTHER CRANES."
Our Invention has for its object a novel arrangement and construction of steam
pipes and connections for dredger and other cranes.
The
First. Our arrangement of steam pipe and connections for self propelling dredgers,
excavators, and cranes, consists in bringing the steam inlet pipe from the boiler
into the bottom of the centre pillar of the dredger, excavator, or crane.
pillar is hollow and forms a steam passage which conducts the steam from the
bottom to the top of the pillar and receives the propelling shaft which passes
therethrough, and is kept steam tight by a stuffing box at each end. The upper
portion of the pillar is provided with a port or passage which delivers the steam to
a cast iron bracket which supports and revolves round the pillar and is kept steam
tight thereon by top and bottom stuffing boxes; the steam pipe to the cylinders is
connected to the cast iron bracket before mentioned which supports the pillar.
The essential feature of this portion of our Invention is the central passage in
the pillar which forms a steam passage and receives the propelling shaft.
Second. Our arrangement of steam pipe and connections for portable dredgers,
excavators, and cranes, consists in carrying the steam passage through the central
pillar which has a closed rounded upper end with a steam passage thereon
communicating with the interior steam passage. Over the closed end we mount
the supporting bracket which is provided with a steam passage in connection with
the pipe leading to the cylinders. The bracket is kept steam tight to the pillar by
a stuffing box at its under side.
The essential feature of this portion of our Invention is the head connection
between the pillar and the supporting bracket.
•

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent. filed
by the said William Dent Priestman & Samuel Priestman in the Great Seal
Patent Office on the 21st February 1882.
WILLIAM DENT PRIESTMAN and SAMUEL PRIESTMAN, both of Kingston-upon-
Hull, in the County of York, Engineers. "IMPROVEMENTS IN AND RELATING TO
STEAM PIPES AND CONNECTIONS FOR DREDGER AND OTHER CRANES."
Our Invention has for its object a novel arrangement and construction of steam
pipes and connections for dredger and excavator cranes.
First. Our arrangement of steam pipe and connections for self propelling dredgers,
excavators, and cranes, consists in bringing the steam inlet pipe from the boiler
into the bottom of the centre pillar of the dredger, excavator, or crane. The pillar
is hollow and forms a steam passage which conducts the steam from the bottom to
the top of the pillar and receives the propelling shaft which passes therethrough,
and is kept steam tight by a stuffing box at each end. The upper portion of the
pillar is provided with a port or passage which delivers the steam to a cast iron
bracket, which supports and revolves round the pillar and is kept steam tight
thereon by top and bottom stuffing boxes. The steam pipe to the cylinders is
connected to the cast iron bracket before mentioned which supports the pillar.
. The essential feature of this portion of our Invention is the central passage in
the pillar which forms a steam passage and receives the propelling shaft.
Second. Our arrangement of steam pipe and connections for portable dredgers,
excavators, and cranes, consists in carrying the steam passage through the central
pillar which has a closed rounded upper end with a steam passage thereon
communicating with the interior steam passage. Over the closed end we mount
the supporting bracket which is provided with a steam passage in connection with
the pipe leading to the cylinders. The bracket is kept steam tight to the pillar by
a stuffing box at its under side.
The essential feature of this portion of our Invention is the head connection
between the pillar and the supporting bracket.
In order that our said Invention may be more fully understood, we shall now
proceed more particularly to describe the same, and for that purpose shall refer
to the several Figures on the annexed Sheet of Drawings, which are marked with
letters and Figures of reference corresponding with those used in the following
explanation. The same letters of reference denote corresponding parts in all the
Figures.
:
"
REFERENCE TO THE DRAWINGS.
Figure 1 is a sectional elevation of the upper part of crane centre pillar and
supporting bracket according to our Invention under the first part.
Figure 2 is a sectional elevation of another arrangement of Figure 1, showing
the lower steam connections.
: Figure 3 is a sectional elevation of another arrangement of Figure 2.

page_text: Upon reference it will be seen that Figures 1, 2, and 3 represent our Invention
under the first part; A. is the centre pillar of a dredger or excavator crane; B is a
cast iron bracket supporting the pillar A and revolving round the pillar A by
means of the bevel gear C driven by the shaft D. E is the steam inlet pipe from
the boiler, and F is the steam ontlet:or conducting pipe from the pillar A to the
cylinders of the crane engine; H is the steam passage in the. pillar A through
which the shaft D passes; J, J, are the glands and stuffing boxes making the
bracket B steam tight with the pillar A; K is the upper gland and stuffing box of
the shaft D; L is the lower gland and stuffing box of the shaft D; M is a
perforated washer through which the steam passes from the passage H to the
pipe F.
It will be seen that the first part of our Invention consists in bringing the
steam inlet pipe E from the boiler into the bottom of the centre pillar A of the
self propelling dredger or excavator crane. The pillar A is provided with a central
passage H, which communicates with the pipe E and conducts the steam to the top
of the pillar where it communicates with the pipe F through the bracket B, the
steam tight joints being secured by the glands J as shown. The propelling
shaft D of the crane passes through the pillar A. as shown, the steam tight joints
being secured by the glands K, L
Upon reference it will be seen that Figures 4, 5, and 6 represent our Invention
under the second part. A is the centre pillar of a dredger, excrator, or excavating
crane; B is a cast iron bracket supporting the pillar A; E the steam inlet pipe
from the boiler, and F is the steam outlet or conducting pipe from the pillar A to
the cylinders of the crane engine; H is the steam passage in the pillar A, which
leads the steam from the pipe E to the pipe F; J is a gland and stuffing box
making the pillar A steamtight with the bracket B.
In the arrangement shown at Figure 6 an independent bracket B is used with
stuffing box at top and bottom, and communicating with the steam passage H, as
shown in the Drawing.
It will be seen that the second part of our Invention consists in bringing the
steam from the boiler through the inlet pipe through the passage H of the
pillar A and through the pipe F of the bracket B to the cylinders of the engines
of portable dredgers and excavator cranes, the steam tight joints being secured by
the glands J as shown.
Having now described our Invention and shown how the same may be carried
into practice, we claim,-
First. The use of stuffing boxes and glands in connection with the cross head
(or bracket) bed plate or centre post (or pillar) of dredger and excavator cranes,
substantially as and for the purposes described and shown.
Second. The arrangement and construction of steam pipes and connections and
stuffing boxes for self propelling dredgers and excavator cranes, substantially as
herein described and shown at Figure I of the accompanying Drawings.
Third. The arrangement and construction of steam pipes and connections and
stuffing boxes for self propelling dredgers and excavator cranes, substantially as
herein described and shown at Figure 2 of the accompanying Drawings.
Fourth. The arrangement and construction of steam pipes and connections and
stuffing boxes for self propelling dredgers and excavator cranes, substantially as
herein described and shown at Figure 3 of the accompanying Drawings.
Fifth. The arrangement and construction of steam pipes and connections and
stuffing boxes for portable dredger and excavator cranes, substantially as herein
described and shown at Figure 4 of the accompanying Drawings.
Sixth. The arrangement and construction of steam pipes and connections and
stuffing boxes for portable dredgers and excavator cranes, substantially as herein
described and shown at Figure 5 of the accompanying Drawings.
Seventh. The arrangement and construction of steam pipes and connections and

page_text: stuffing boxes for portable dredger and excavator cranes, substantially as herein
described and shown at Figure 6 of the accompanying Drawings.
In witness whereof, we, the said William Dent Priestman and Samuel
Priestman, have hereunto set our hands and seals, this Fifteenth day of
February, in the year of our Lord, One thousand eight hundred and 5
eighty two.
WILLIAM DENT (L.S.) PRIESTMAN.
SAMUEL
(L.s.) PRIESTMAN.