Improvements in the Structural Arrangement of Lower Deck, Orlop, or Cabin Sole Stringers in the Holds of Ships.
Year: 1892

page_text: Date of Application, 1st Dec., 1892
Complete Specification Left, 5th June, 1893-Accepted, 22nd July, 1893
PROVISIONAL SPECIFICATION.
Improvements in the Structural Arrangement of Lower Deck, Orlop,
or Cabin Sole Stringers in the Holds of Ships.
I GEORGE WILLIAM SIVEWRIGHT of 5 Radcliffe Terrace Hartlepool in the
County of Durham Shipbuilder do hereby declare the nature of this invention to
be as follows:-
My invention relates to the fitting of lower deck, orlop or cabin sole horizontal
plate stringers in ships and has for its object an improved construction whereby the
weight of material for equal strength is less and the cost of manufacture is less than
the methods of construction now in use. Hitherto it has been the practice to fit a
broad horizontal plate stringer connected to the shell plating and reverse frames by
horizontal angle plates, and on the inner edge nearest centre line of ship to be
stiffened by horizontal angle plates with face plates. I dispense with the horizontal
angle plates and face plates on the inner edge nearest centre line of ship, and flange
the horizontal stringer plate thus giving more strength to the inner edge nearest
centre line of ship with less weight of material. And where the strong heavy
athwartship beams at the ends of hatchways or at other parts extending from one
side of the ship to the other are connected to the stringer plates and main angle
framing of ship, instead of fitting an ordinary horizontal covering or gusset plate
connecting the beams and stringer plates together, I make this covering or gusset
plate a continuation of the broad horizontal lower deck orlop or cabin sole stringer
plate, thus by a combination of plates I dispense with riveting and get a much
lighter structure with less cost of construction and more strength.
Dated this 30th day of September 1892.
GEORGE WILLIAM SIVEW
GHT.
COMPLETE SPECIFICATION.
Improvements in the Structural Arrangement of Lower Deck, Orlop,
or Cabin Sole Stringers in the Holds of Ships.
I, GEORGE WILLIAM SIVEWRIGHT, of 5, Radcliffe Terrace, Hartlepool in the
County of Durham, Shipbuilder, do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
My invention relates to the fitting of lower deck, orlop, or cabin sole horizontal
plate stringers in ships and has for its object an improved construction whereby,
and in combination with other advantages the weight of material for equal strength
is less and the cost of manufacture is less than the methods of construction now
in use.
In the drawing hereunto annexed Figures 2 and 4 are sectional views taken on
linex of Figure 1 and line y y of Figure 3 respectively.
Hitherto it has been the practice to fit a broad horizontal plate stringer a,
connected to the shell plating and reverse frames by horizontal angle plates a¹ a³
respectively and on the inner edge nearest centre line of ship to be stiffened by
horizontal angle plates b¹ 62 with a face plate 3 in the form of a flange extending
above and below the level of the stringer plate a, as shown in Figures 1 and 2
I dispense with these horizontal angle plates 6' 62 and face plates on the inner
edge nearest the centre line of the ship and flange the horizontal stringer plate
downwards as shown in Figure 4, thus giving more strength to the said inner edge
with less weight of material. And where the strong heavy athwartship beams c at

page_text: the ends of hatchways or at other parts extending from one side of the ship to the
other are connected to the stringer plates a and main angle framing of the ship,
instead of fitting an ordinary horizontal covering or gusset plate d connecting the
beams and stringer plates together, I make this covering or gusset plate in the form
of a continuation or intermediate length of the broad horizontal lower deck orlop
or cabin sole stringer plate a', in the manner shown in Figure 3, by which com-
bination of plates, I effect the requisite connections between the athwartship beams
and the stringer plates, at the same time dispensing with some of the rivetting and
getting a lighter structure with less cost of construction and more strength, that is
to say, that in the place of the gusset or covering plates d rivetted edgewise to the
stringer plate a, as shown in Figure 1, I provide the plates d' as shown in Figure 3,
in which form they serve both as continuation plates between two sectional stringer
plates a a, and as gusset plates for effecting the requisite connections with the
athwartship beams c, from which it will be observed that the combination of the
parts a and d' as shown in Figures 3 and 4 becomes the substituted arrangement
for the combination of the parts a, 61 62³ and d as shown in Figures 1 and 2. And
by flanging the edge of the stringer plate downwards so that no channel is formed
as between the angle plates a² and as shown in Figure 2, the cargo and especially
a bag cargo is less liable to damage in consequence, and no lodgment is afforded for
dirt and refuse, added to which the stringers are more easily cleaned in discharging
cargo and sluiced down.
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 :-
In the structural arrangement of lower deck, orlop, or cabin sole stringers, in the
holds of ships, the improved arrangement and construction of parts as hereinbefore
described and illustrated in Figures 3 and 4 of the accompanying drawing.
1000
G. J. CLARKSON,
Chartered Patent Agent,
Stockton-on-Tees, Agent for the Applicant.