provements in the Construction of the Hulls of Vessels
Year: 1895

page_text: Date of Application, 30th Apr, 1895-Accepted, 1st June, 1895
COMPLETE SPECIFICATION
Improvements in the Construction of the Hulls of Vessels
I, GEORGE WHELLWRIGHT SCHERMERHORN, of 231 Pine Street, in the City
and County of Philadelphia, State of Pennsylvania, one of the United States of
America, Mariner, 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
My invention relates to improvements in the construction of the hulls of vessels,
and more particularly to improvements in the construction of that part of the bull
which is beneath the water line, the object of my invention being to furnish in
connection with a hull means for carrying and supporting the propeller shaft or
shafts which will present the least resistance to the passage of the vessel through
the vate
The main body of my vessel beneath the water line has preferably the form of
part of a circular spindle, that is to say, it has the form of part of the figure which
would be generated by revolving the arc of a circle about its chord, consequently
cross sections of this part of the vessel at any point have the form of arcs of circles,
and the same is true of any longitudinal sections of the vessels bottom
If the vessel is to be furnished with a single screw I furnish it with a run, to
carry and support the shaft, the lower part of which has the form of a section of a
circular spindle the forward part of which is cut away so as to join the main bull,
which is united to the main hull by means of a dead wood or substantially flat
surface The shaft may run through the spindle shaped part of the run or through
the flat surface which joins this spindle shaped part to the hull
If the vessel is to be furnished with twin or triplicate screws the hull is fitted
with two supplemental runs which are of the same construction as that already
described In order that these supplemental runs may offer the least resistance to
the passage of the vessel through the water they must be placed radially to the
hul, that is they must be so placed that a plane passing upward through their
longitudinal axes would pass through the longitudinal axis of the main spindle or hull
If the vessel be a twin screw vessel the shafts of the screws would be carried in
or central
the supplemental runs while the rudder would be carried by the main
run
If a triple sciew vessel all the runs would carry shafts while the rudder
would be preferably carried by the main or cential one
In the drawings in which similar letters of reference indicate similar parts
throughout the several views,
Fig 1, is a side elevation of my improved vessel furnished with a central run
and one screw
Fig 2, a plan of Fig 1
Fig 3, a rear elevation of a vessel of my construction fitted with one screw
Fig 4, a similar view of a vessel having two screws
Figo, a similar view of a vessel having triple screws, and
Fig 6, a section of Fig 1 on line 1-2
,
That part of the hull or body of the vessel A which is beneath the water line is
of the form of part of a circular spindle, in other words it has the form which
would be generated by revolving the arc of a circle B C D, Fig 1, around its
chord B D, hence all cross sections of that part of the vessel which are beneath
the water line will have the form of arcs of circles and all longitudinal sections
will also have the form of arcs of circles

page_text: My means for carrying the propeller shaft or shafts of a vessel of this
construction consist, if the vessel be furnished with a single screw of a run the
lower part a of which has the form of part of a circular spindle the forward part of
which is cut away so as to join the body of the vessel, as shown in Fig 1, and of a
dead wood or substantially flat suifice b the lower part of which is secured to the
part a and the upper part to the vessel A The propeller shaft may run through
the spindle a or through the dead wood b, either of these being roperly fitted with
bearings for it, in either case the shaft would be supported throughout its entire
length
It the vessel is to be fitted with twin screws two supplemental runs the lower
parts a of which are sections of a circular spindle which are united to the main
hull by dead woods 6 Fig 4, would be employed to hold and support the shafts
These supplemental runs would be precisely similar to the un already described
but they would be located to the sides of the ve sel and would be placed radially to
the hull, that is, they would be so placed that a plane passing longitudinally
upward through their centres would also pass longitudinally through the axis or
choid B D of the vessel The runs being placed in this manner present the least
resistance in their passage through the water
In a twin sciew vessel I would prefer to have the hull, in addition to the
supplemental runs, furnished with a central run to which the rudder would be
hung, in this case the after part of the run would correspond to the ordinary stern
post
If the vessel be furnished with tuple screws the runs would be arranged is
already described and each would carry a shaft and screw as shown in Fig 5
1 he runs instead of being adapted to carry the shafts may be adapted to carry
torpedo tubes and in this case they may be placed either at the bow or stern, or
both, of the vessel
Having now puticularly 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 13
1 A vessel having on its bottom a supplemental run whose lower part has the
form of a section of a spindle, the stern post or thin end of which is in a line radial
to a cross section of the vessel
2 A vessel provided with a supplemental run on its bottom attached to, or
forming part thereof, so that a plane passing longitudinally through its centre will
pass longitudinally through the longitudinal axis of the vessel
3 The combination, with a vessel whose hull beneath the water line is of the
form of a section of a spindle, of two or more runs the under parts of which have the
form of a section of a spindle and the upper parts of which are formed of dead
woods which unite said lower parts to the hull of said vessel, each of sud runs
being so placed that a plane passing longitudinally upward through its centre
will pass longitudinally through the longitudinal axis of the spindle-shaped part
of the vessel
Dated, at Philadelphia, this 5th day of April 189›
RGE WHEELWRIGHT SCHERMERHORN
D Young & Co,
11 & 12, Southampton Buildings, London WC,
Agents for the Applicant