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Патент USA US2129973

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SW. 13, 1938.
2,129,913 '
Filed Feb. 16, 1937
5 Sheets-Sheet 1
Sept. 13, 1938.
Filed Feb. 16, 1957
5-Sh_eets-Sheet 2
Sept, 13; 1938.
Filed Feb. 16, 1937
5 Sheets-Sheet 5
Sept 13,
_]_ TUTlN
29,973 ,
Filed Feb. 16, 1937
5 sheetsl-sheet 4
' Sept. 13, 1938.
2,129,973 I
Filed Feb. 16, 1937
5 Sheets-Sheet 5
'IH I , J
vi" .2;
Patented Sept. 13, 1938
2,1 29,97 3
John Tutin, London, England
Application February 1 6, 1937, Serial No. 126,066
In Great Britain February 22, 1936
3 Claims.
(Cl. 114—202)
bulbous portions thereon constitute track rails
for the lifting jacks.
This invention relates to ships’ hatch covers.
Its principal object is to provide improved means
whereby covers or cover-sections of considerable
weight can be readily manipulated by hand power.
5 More speci?cally, the object of the invention
is to provide means enabling heavy covers or
cover-sections to be lifted from the hatch, trans
ported to a stowage space and rotated into an
edge-upwards position for stowage when not in
. use and these operations to be performed in the
reverse order all expeditiously and with a mini
mum of manual labour.
With these objects in view the invention pro
vides the combination of a ship’s hatchway cover
15 having at each of two opposite sides thereof, or
of two opposite sides of each section of a sec
tional cover, a jack-connecting part, which jack
connecting parts are coaxially arranged and are
disposed so that their axes lie at approximately
the same level as the center of gravity of the
cover or cover-section, and two travelling
removable and portable lifting jacks (for example
screw jacks) having lifting members and cover
connecting parts thereon for interengagement
25 with the jack-connecting parts on the cover, or
on all the cover-sections successively, the inter
engaging connecting parts being adapted to per
mit rotation of the cover, or cover-section, into
an edge-upwards position about their common
30 axis.
Preferably said interengaging connecting parts
are in the form of lateral projections in the
form of spindles on the cover, or cover-sections,
and bearings or sockets on the lifting pillars of
35 I the jacks but any other convenient construction
may be employed. For example,_ there may be
projections on said lifting pillars adapted to en
ter hearings or sockets on the cover or cover
sections. The said projections and bearings or
sockets may be formed integrally with the parts
by which they are carried, or be secured theretov
(for example by welding) or they may be remov
ably mounted thereon.
Two stowage rails are arranged each in spaced
parallel relation with one of the track rails at
the stowage space alongside which the track rails
extend; the spindles, while situated in said bear
ings, have parts adapted to rest on and be sup
ported by the stowage rails when the cover mem
bers have been transported by the lifting jacks
along the track rails to the stowage space.
According to a feature of the invention, bulb
In the case of sectional covers, it is preferred
to provide a gutter between adjacent cover-sec
One embodiment of the invention will now be
described, by way of example, with reference
to the accompanying drawings in which:
Figures 1 and la show in side elevation a hatch
with a sectional cover in position thereon,
' Figures 2 and 2a show a plan thereof,
Figure 3 is a sectional elevation on the line
3—3 of Figure 2 but drawn to a larger scale,
Figure 4 is a section on the line 4—4 of Fig
ure 8,
Figure 5 is a side elevation drawn to a still
larger scale showing one of the lifting jacks ap
plied to a cover-section ready to lift the same,
Figure 6 is a side elevation showing the lifting
jack and the cover-section in positions which
they occupy when the latter has been carried to
the stowage space and turned edge-upwards, and
Figure '7 is a detail view showing a modi?ca—
tion hereinafter referred to.
Like reference numerals indicate like parts. 25
On the drawings the invention is shown applied
to a weather deck hatchway of a cargo tramp
steamer, only so much of the deck l0 being
shown as is necessary to illustrate the invention. 30
The hatchway II is situated between a deck
house I2 and a mast l3. Winches for manipu
lating the cargo are disposed between the mast
and the hatch. The hatch coaming comprises
side bulb plates 15 and end bulb plates I6. At a 35
distance below the level of the top of the coaming
su?icient to permit the lifting jacks hereinafter
described to be applied to the cover-sections, side
bulb angle coaming stiffeners I‘! are provided.
These stiffeners are arranged with the bulbous 40
portions I8 upwards, see Figure 4, for a purpose
to be later explained. A similar coaming stiffener
I9 is provided along the forward end of the hatch
coaming. Between the deckhouse l2 and the
hatch is a stowage space 20 in which the cover4
sections of the hatch are stowed edge-upwards
when removed from the hatch. The side coaming
stiffeners I‘! are continued past the hatch end
adjacent the deckhouse for the extent of the
stowage space 20 where each is surmounted by
a plate structure 2i having a bulb plate top 22
constituting a stowage rail to support stowed
coaming stiffeners are ?xed to the sides of the
cover-sections in the manner hereinafter ex
plained. The hatch cover consists of a number
hatchway coaming and are arranged so thatthe
of steel sections 23 to 29 inclusive placed athwart
ships across the hatchway. The fore and aft
widths of the cover-sections 23 to 28 are the
same and the half-width of each of these sec
tions is approximately equal to the height of the
hatch coaming. The forward cover-section 29 is
approximately half the fore and aft width of the
hatch cover-sections is as follows:—-The clamp
ing or wedging devices, if provided, are ?rst re
leased and then the crutches 42 of the screw
jacks are slipped on the spindles 38 of the cover
section 23 and secured by the screw clamps 43.
The cover-section is then raised from its seating
other sections to facilitate its being turned edge
on the hatch coaming by turning the jack hand
upwards in the minimum space available when
the sections 23 to 28 have been stowed in the
wheel 44 of each jack. When the cover-section
has been raised sufficiently, say about 2 inches
from the top of the hatch coamings, the pair of 10
stowage space 20.
Each of the cover-sections is of hollow form jacks and the cover-section they jointly support
and comprises a top plate 30, see Figures 3 and 4, 1 are rolled along the tracks Hi to a position beyond
and girder angles 3|, 32 and 33 to which the the hatch end over the stowage space 20. In
top plate is welded. The angles 3|, 32 lie longi
this position the screw clamps 43 are freed and
the cover-section is swung in the jacks through
15 tudinally of the cover-section, i. e. across the
hatch, and the angles 33 lie transversely of the 90° to a vertical position. The cover-section is
cover-section, i. e. lengthwise vof the hatch. .All then lowered by turning the jack hand wheels
these girder angles are disposed with one ?ange 44 until its spindles 38 rest upon the bulb plate
edge-upwards so as to permit the bottom faces tops 22 of the plate structure 2| at the stowage
20 of the other ?anges to rest on rubber strips 34
space, as shown in chain lines in Figure 1, after 20
which are interposed between the girder angles which the jacks are removed and run back along
and the upper bulbous ends of the coaming plates , the tracks l8 to handle successive covers in a
IS, IS so as to provide a watertight joint. The similar way. In Figure 3 it is assumed that the
cover-sections 23 to 28 are also provided each
25 with an intermediate sti?ening girder 35 disposed
between and parallel to the girder angles 3!, 32.
The girder angles 3| of the cover-sections 23 to
28 face inwards and the girder angles 32 of all
the cover-sections face outwards. An edge bar
36 is weldled to the edge of the bottom limb of
each of the girder angles 32 so as to provide a
gutter 50 between it and the upstanding limb of
the angle and a rubber sealing strip 37 secured
to the edge bar 36 is provided between the latter
and the adjacent girder angle 3| to provide a
watertight joint between the adjacent cover-sec
cover-sections 23 to 2'! have been removed and
stowed and one of the jacks is shown in dotted 25
lines in position to raise and remove the next
cover-section 28.
Should it be desired, for example during rainy
weather, to uncover only a portion of a large
hatchway, say the portion covered by the cover~ 30
sections 25 and 26, then the cover-sections 23 and
24 may be removed and stowed and cover-sections
25 and 26 be raised, transported and lowered into
the positions formerly occupied by cover-sec
tions 23 and 24.
In the modi?cation shown in Figure 7, the top
plates 30 of adjacent cover-sections are provided
along adjacent longitudinal edges with depend
The cover-sections may be held in place by any
suitable clamping or wedging devices which as
they form no part of the present invention are
ing ?anges 41. Each of these ?anges is welded to
not shown on the accompanying drawings.
is so disposed that said limb will rest on the warm
Two travelling removable and portable lifting
screw jacks one only of which is seen in Figures
5 and 6, are provided for removing, stowing and
Each cover-section
has projecting laterally from each end a hollow
spindle 38 supported by a bracket 39 on the girder
angles 33. The spindles 38 of each cover-section
' ' replacing the cover-sections.
are coaxial with one another and approximately
in line with the centre of gravity of the cover
section. The two lifting jacks are applied to these
two spindles respectively and are in charge of
two men, one on each side of the hatchway.
The lifting jacks are identical so that a de
scription of one will su?ice for both. Each jack is
mounted upon a pair of wheels I39 adapted to
travel along the tracks provided by the bulbous
portions l8 of the side coaming stiffeners H. The
jack body 40 is disposed between the wheels I39
the inner face of one limb of an angle 48 which 40
ing and the other limb 49 will lie adjacent the
corresponding limb of the other angle. The rub
ber sealing strip 31 is secured to one of the ad
jacent angle limbs 49. The plate ?anges 41 are 45
welded to the angles 48 at such positions as to
provide gutters 50 between them and the angle
limbs 49. The angles 48 may be bulb angles as
shown, or plain angles, or alternatively chan
nels may be employed. In the latter case, the 50
bottom of the channel will rest on the coaming
and the gutter will be formed between the plate
?ange and one side of the channel.
In the construction described above, a stowage
space 20 is provided at one end only of the hatch, 55
There may be a stowage space at each end of the
and mounted therein is an externally screw
hatch to permit some of the cover-sections to be
stowed at one end and others at the other end.
Alternatively, when the cover-sections are dis
posed with their longitudinal edges fore and aft 60
threaded lifting pillar 4| having at its upper
of the deck, provision may be made for stowing
end a hollow crutch 42 adapted to engage the
them at one or both sides of the hatch.
corresponding spindle 38 of the cover-section to
case, the tracks for the lifting jacks will be pro
vided at the ends of the hatch.
Further, the provision of a stowage space pro~ 65
vided with supports, such as the aforesaid rails 22,
for the spindles 38 of the cover-sections, is not
essential to the invention. The said spindles
may be used only for lifting and- lowering the
cover-sections and for moving them within the 70
boundary of the hatchway, for example to a posi
tion whence they can be removed by a derrick
for stowage flat on the deck.
Alternatively, the cover-sections may be turned
be manipulated. A screw clamp 43 is provided for
securing the spindle and crutch together. The
lifting pillar 4| is arranged to be raised and low
ered by means of a hand wheel 44 which has
?xed to its axle a bevel wheel 45, see Figure 5.
Said bevel wheel meshes with a hollow bevel
70 Wheel 46 which is constrained against movement
in the direction of its axis. Said latter bevel
wheel is rotatably mounted on the lifting pillar
4! so that by turning the hand wheel 44, the
lifting pillar can be raised or lowered,
The operation of removing and stowing the
In this
edge-upwards in the jacks when removed to the 75‘
stowage space and then be lowered in said jacks
until the bottom edge rests on the deck, and then
be tilted so that they lean against a support, for
example the wall of the deck-house l2.
Any convenient means may be provided for
preventing any substantial endwise and/or side
wise movement of the cover or cover-sections on
the hatch due to pitching and/or rolling of the
ship. For example there may be provided de
10 pending flanges on the cover or cover-sections
arranged to lie inside the hatch coaming. In
the construction shown on the drawings, ?anges
5| are provided on the ends of the cover-sections
for preventing endwise movement of the cover
sections individually, and a ?ange 52 is provided
on the outer longitudinal side of the cover-sec
tions 23 and 29 (only the ?ange 52 on the cover~
section 29 is shown on the drawings) for pre
venting fore and aft movement of the cover as a
20 whole.
It will be evident that the invention provides
means whereby heavy steel covers can be re
moved and replaced with ease and rapidity with
out the provision of derricks and winches.
In the appended claims the term “cover mem
ber” is intended to include both a one-piece cover
for a smaller hatchway and any one of a num
ber of independent cover-sections of a sectional
cover which when arranged side by side constitute
a cover for a larger hatchway.
I claim:—
1. Apparatus for lifting ship’s hatchway cover
members from the hatch and transporting them
to a stowage space comprising a cover member,
two coaxial jack-connecting parts on opposite
sides of the cover member, two travelling remov
able and portable lifting jacks each having two
track wheels, a lifting pillar, and a cover-con
necting part on the pillar adapted to engage a
said jack-connecting part on the cover member,
and two track rails lying at opposite sides of the
hatch and extending alongside the stowage space,
one track rail for each lifting jack, in combina
tion with two stowage rails arranged each in 10
spaced parallel relation with one of the track
rails at the stowage space, which jack-connecting
parts are constituted by spindles projecting lat
erally from the cover member, and which cover
connecting parts are constituted by bearings each
for receiving a said spindle adapted to rotate
therein, which spindles, while situated in said
bearings, have parts adapted to rest on and be
supported by said stowage rails.
2. Apparatus for lifting ship’s hatchway cover 20
members as set forth in claim 1, wherein the
axis of rotation of said spindles extends through
the cover member and lies close to the center of
gravity thereof, and each track rail is constituted
by the bulbous portion of a bulb coaming sti?ener 25
?xed one at each side of the hatchway coaming
and extending alongside the stowage space.
3. Apparatus for lifting ship’s hatchway cover
members as set forth in claim 1, wherein the
track rails are situated on the side of the hatch
way coaming above the deck level, and the stow
age rails lie a short distance above the level of the
track rails.
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