Improvements in Bulkheads for Cargo Vessels.
Year: 1898

page_text: Date of Application, 8th Feb., 1898
Complete Specification Left, 8th Nov., 1898-Accepted, 31st Dec., 1898
Improvements in Bulkheads for Cargo Vessels.
I, GEORGE MITCHELL HARROWAY, of 8, Cambridge Terrace, Middlesbrough,
in the County of Yorkshire, Naval Architect, do hereby declare the nature of this
invention to be as follows:
My invention relates to bulkheads for cargo vessels and has for its object to
provide bulkheads so constructed and adjustably arranged as to serve either as
longitudinal or transverse bulkheads and especially adapted to form when re-
quired water ballast tanks for ballasting purposes or auxiliary coal bunkers or
spare holds for special cargo.
According to my invention form the transverse or longitudinal bulkheads of
a vessel in one or more sections each adapted to make a watertight joint against
suitable web plates or the like arranged vertically and horizontally between the
decks, above beneath and at the sides of the bulkheads, and longitudinally or
transversely. Such bulkhead scctions are hinged vertically or horizontally
together or separately, or mounted upon a suitable frame adapted to swing upon
a vertical or horizontal pillar or shaft mounted in bearings and arranged cen-
trally or at the sides of the vessel.
and
In one form of bulkhead divided into two sections and mounted centrally,
each section which may be formed of the usual plating having flanged ends or
otherwise provided with strengthening ribs, is mounted and carried upon a
frame of cast steel or other suitable material having two or more arms for
attachment of the bulkhead section and mounted upon a pillar or shaft whose
ends are carried in suitable bearings or sockets upon the floor and the underside
of the deck above. For securing a watertight joint when the bulkheads are
closed suitable coaming and webb plates are arranged in a transverse, longi-
tudinal and vertical position or following the contour of the cross sectional form
of the vessel, the bulkhead sections being correspondingly formed and adapted
to make a water tight joint against the said plates by means of nuts and bolts
or other clamping devices, the joints being properly faced or suitable packing
provided thereat where required. For ease in manipulation of the hinged sections
and lessening strain upon the hinged parts antifriction rollers may be provided
in convenient positions.
Bulkheads constructed and arranged as described interfere but little, if at all,
with the cargo capacity of the vessel and they may be used to divide the vessel
transversely or longitudinally as required or according to the nature of the
cargo, and when not in use they may be moved back into a longitudinal posi-
tion against the sides or centrally of the vessel according to the position in which
they are mounted and when the vessel is in a light condition two or more of the
sections may be closed transversely forming tanks for water ballast to increase
the draft of the vessel rendering it better able to meet severe weather whilst
when required they may be placed in similar positions to form auxiliary coal
bunkers or a spare hold for special cargo.

page_text: Improvements in Bulkheads for Cargo vessels.
I, GEORGE MITCHELL HARROWAY, of 8, Cambridge Terrace, Middlesbrough, in
the County of Yorkshire, 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:.
-
My invention relates to bulkheads for cargo vessels and has for its object to
provide bulkheads so constructed and adjustably arranged as to serve either as
longitudinal or transverse bulkheads and especially adapted to form when re-
quired water ballast tanks for ballasting purposes or auxiliary coal bunkers or
spare holds for special cargo.
According to my invention I form the transverse or longitudinal bulkheads of
a vessel in one or more sections each adapted to make a watertight joint against
suitable web plates or the like arranged vertically and horizontally between the
and
decks, above beneath and at the sides of the bulkheads, and longitudinally or
transversely. Such bulkhead sections are hinged vertically or horizontally
together or separately, or mounted upon a suitable frame adapted to swing upon
a vertical or horizontal pillar or shaft mounted in bearings and arranged cen-
trally or at the sides of the vessel.
Referring to the accompanying drawings, Fig. 1 is a half transverse section
of a ship showing in front elevation a bulkhead section made and fitted in
accordance with my invention. Fig. 2 is a sectional plan of a ship's hold with
my bulkhead fitted thereto. Fig. 3 is part of a similar view to a larger
scale. Fig. 4 is a detail. Fig. 5 is a longitudinal diagrammatic view of a ship
fitted with improved bulkheads. Fig. 6-is a front elevation and Fig. 7 a sectional
view of a modified form of bulkhead.
In the form shown the bulkhead is divided into two sections AB mounted
centrally of the vessel as at a and b respectively to a central support of suit-
able dimensions, in the form of a pillar, or of angle irons and plating as shown;
the Sections A and B are or may be formed of the usual plating chaving
flanged ends or provided with strengthening ribs c¹ of angle iron or the like
and each section is mounted and carried upon a frame of cast steel, channel
iron framing or the like, in the drawing this frame is shown as consisting of
arms dd of channelled iron or steel formed in one with or connected to and
mounted upon a vertical pillar or shaft E which may also be of channelled
section as shown and have at its upper and lower ends a forged or cast portion F
bolted or otherwise secured to the channelled part E and having a pivot or
pintle g turned or otherwise formed thereon and mounted and adapted to turn in
sockets such as hh arranged on the floor or tank top I and the deck J above;
one of the sockets h is made in halves suitably joined to facilitate mounting.
For securing a watertight joint when the bulkheads are closed, for instance,
as in Fig. 2 or the section B in Fig. 3, suitable coaming and web plates k k
extending outwards from the sides, floor and top of the "hold are arranged in
a transverse and vertical position and following the contour of the cross sec-
tional form of the vessel or the hold (as shown in Fig. 1). The bulkhead
sections A and B are correspondingly formed and adapted to make a watertight
joint against the said plates kk and support ko by means of a tap bolt z as shown
in the detail Fig. 4 or by suitable clamping devices such as shown at
Fig. 3 the joints being properly faced, or a strand of rope packing or 'other
suitable material is provided 'as' shown at m m in Fig. 3 arranged between two
recessed bars nn', one upon the bulkhead and the other on the plates kk, or the
in

page_text: joint may be made
as shown in Fig. 4 where the coaming plate k
has an angle iron k¹ attached whose projecting edge is arranged
and adapted to pass into a recessed or grooved part 2 in which packing mis
provided and the plates n, k are drawn together by a tap bolt such as or other
suitable nuts and bolts are provided.
It will be obvious that if the bulkhead sections are to make a watertight joint
in a longitudinal direction or in both a longitudinal and transverse direction
web plates such as kk will be arranged longitudinally for instance on the fixed
bulkhead P.
In Figs. 6 and 7 the bulkheads are shown so mounted that their hinged
parts and consequently the position of the bulkheads themselves in the hold
may be altered to enclose a larger or smaller portion of the latter as circum-
stances require. This is effected by mounting the bulkheads or their supporting
parts upon rollers or wheels Q adapted to be travelled on rails qq disposed longi
tudinally as shown or in other direction in which it is desired the bulkhead
shall be moved. These rails are or may be arranged centrally at either side of
deck supporting pillars tt or otherwise as the bulkhead may be supported.
The bulkheads are provided when required with a hinged part r to allow of
adjustment of the dimensions of the bulkhead to meet the variations in the
dimensions of the hold. Web plates such as kk referred to are or may be pro-
vided at suitable intervals in the length of the hold for use in making a joint
with the bulkheads at such positions, a wooden battens is or may be provided
between the bulkhead and the tank top.
It will be obvious that for cargo carrying and coal bunker purposes the bulk-
heads need not be watertight a dust proof joint being all that is required and
readily secured by or even without the aid of the web plates k.
To ensure ease in manipulation of the sections and lessening strain upon the
hinged parts antifriction rollers such as o are or may be provided in convenient
positions.
i
Bulkheads constructed and arranged as described interfere but little if at all
with the cargo capacity of the vessel and they may be used to divide the vessel
transversely as shown in Figs. 1 and 2 or longitudinally as shown at A Fig. 3
according to the nature of the cargo and they may be arranged to make a
watertight joint in both transverse and longitudinal positions if required. Fig. 5
shows a ship fitted with bulkheads at r in the cargo hold X' so that when not in
use the bulkheads A and B may be moved back longitudinally against the side
or centrally of the vessel according to the position in which they are mounted
and the whole length of the hold between the ordinary fixed bulkheads I' and
P is open, whilst, when the vessel is in a light condition two or more of the
sections may be closed transversely, as in Fig. 2 forming a tank T Figs. 2 and 5
for water ballast to increase the draft and render the vessel better able to meet
severe weather, whilst, when required they may be placed in similar position
or at right angles as in Fig. 3 to form coal bunkers or a spare hold for special
cargo or the enclosed space T Figs. and 5 may be used for similar purposes.
When arranged as described in reference to Figs. 6 and 7 it will be seen that
for use as auxiliary coal bunkers the capacity of the same may be adjusted to
the quantity of coal it is desired to carry for instance the same bulkhead as
shown at a Fig. 5 may be moved to and closed at the dotted positions or
in the same figure.
In some cases the bulkheads are hinged horizontally to the floor or top of the
hold.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim:
-
1. The improved bulkheads for cargo vessels formed in one or more sections
and hinged together or hinged centrally or laterally and vertically or hori-

page_text: :
zontally of the vessel or hold to which they are fitted said eations being
adapted to form transverse or longitudinal bulkheads by being moved and
secured in such positions substantially as set forth.
2. The improvements in bulkheads for cargo veasels comprising transverse
or longitudinal bulkheads. formed in one or more sections hinged together or to
the side, centre, top or floor of the hold to which they are fitted and adapted to
be closed against and make a joint, watertight or otherwise, with suitable web
plates or the like arranged vertically and horizontally and in a transverse or
longitudinal position or both substantially as set forth.
3. The improved bulkheads constructed, arranged and adapted for use sub-
stantially in the manner and for the purposes herein set forth in reference to
and as shown in Figs. 1 to 5 with the modification described in reference to
and as shown in Figs. 6 and 7 of the accompanying drawings. `
Dated this 7th day of November 1898.
.
For the Applicant,
PRYOR & HARVEY,
Agents, 3, St. Nicholas' Buildings, Newcastle-on-Tyne.