Improvements in Plating for Bulkheads in-Ships; Cofferdams;: Dock: Gates, and the like..
Year: 1891

page_text: Date of Application, 5th Sept; 1891
Complete .Specification Left, 7th June, 1892-Accepted; 9th July, 1892 ►
PROVISIONAL SPECIFICATION…..
Improvements in Plating for Bulkheads in-Ships; Cofferdams;:
Dock: Gates, and the like..
I, JAMES SANDERSON of 31 Park Road Jarrow in the County of Durham.
Naval Architect, .do-hereby declare the nature of this invention to -be-s
follows:-
.18
"This my invention relates to improvements in plating for bulkheads in ships,
cofferdams, dock-gates and the like, and the object. of, my invention is to dispense
with the usual stiffening bars, web-plates, or other devices which are now required
to impart rigidity and strength to the said structures by forming the plating in
such a manner, that no stiffenings shall be required.
In carrying my invention into practice I form the plates by any suitable process
into undulations, which may be angular or curved in cross section in any desired
form. The said plates are joined at their edges by rivetting or other means thus
forming an undulatory structure.
The pitch or distance between the undulations may be increased. or.diminished
according to the purpose for which the plating is intended to be applied and the
strength required.
The plating may be arranged..so..that the-undulations run vertically or horizon-
tally. In ships where they are applied horizontally: it may be found desirable to
insert a diaphragm between the undulations to counteract any tendency there may-
be to "bellowsing" but where they are applied vertically such diaphragm will be
found unnecessary as sufficient lateral stiffness can be given to.the ship's sides, by.
fitting web-plates in the usual manner and which would also form part of the
bulkhead.
By the use of my improved (undulatory) system of plating no stiffeners are
required the advantage of which will be readily understood, particularly in
situations where considerable stresses have to be borne by the plating and the
saving in cost and weight will also be found very considerable.
Dated this 4th day of September 1891.
HORN & SON,
Applicant's Agents.
COMPLETE SPECIFICATION.
Improvements in Plating for Bulkheads in Ships, Cofferdams,
Dock Gates, and the like.
I, JAMES SANDERSON of 31 Park Road Jarrow in the County of Durham
Naval Architect, 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 my invention relates to improvements in plating for bulkheads in ships
cofferdams dock gates and the like and the object of my invention is to dispense
with the usual stiffening bars web plates or other devices which are now required
to impart rigidity and strength to the said structures by forming the plating in
such a manner that no stiffenings shall be required.
In the accompanying drawing I have illustrated in Figures 1 to
several forms
of plating which I may adopt but other sections may be employed according to the
purpose for which it is intended to be used and Figure 6 is a detail hereinafter
described.

page_text: In carrying my invention into practice I form the plates by any suitable process
into undulations which may be angular or curved in cross section as indicated in
the accompanying drawings Figs. 1 to 5, or other desired forms.
The edges of the plating are joined by rivetting or other means.
The pitch or distance between the undulations may be increased or diminished
according to the purpose for which the plating is intended to be applied and the
strength required for the structure.
The undulations may be arranged to run vertically or horizontally according to
requirement.
The strength of the structures may be materially increased by the introduction
of diaphragm plates as shewn at a in Fig. 6, the said diaphragms being composed
of small plates and bars the cost will be very small compared with the advantage
gained.
My improved system will be found to afford a vast increase of strength together
with a reduction in weight of at least 15 per cent. from the methods usually
employed. There being fewer joints and rivet holes it requires less labour to make
it thoroughly oil or watertight.
The improved system of plating when in contact with any other structure to
which it may be necessary to be applied will distribute the local strain over an
increased area instead of being entirely in one direction as in the present system of
plating.
The application and method of using the plating may be varied according to the
nature of the structure for which it is intended to be 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
The improvements in plating for bulkheads in ships cofferdams dock-gates and
the like substantially as herein before described and set forth.
Dated this Fifth day of June 1892.
HORN & SON,
Applicant's Agents.