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_ Oct. 29, 1946-
Filed Jan. 7, 1944
2 Sheets-‘Sheet 1
F/ 9/
‘3(1- 29, 1946-
Filed Jan. ‘7, 1944
2 Sheets-Sheet 2
Patented Oct. 29, 17.943
Joseph H. Higginson and Homerv C. Riggs, An
dover, Mass, assignors to Riggs & Lombard,
Inc., Lowell, Mass., a corporation of Massachu
Application January 7, 1944, Serial No. 517,460
3 Claims.
This invention relates to safety mechanism for
closing an opening in a receptacle containing
?uid underpressure, and the general purpose of
the invention is to provide mechanism for pre
(Cl. 220-40)
' the upper portion of the dye kettle and the cover
plate therefor provided with a sampling hole and
cover mechanism embodying the invention;
Fig. 2 is a plan view of the same, portions of
the cover plate being broken away;
Fig. 3 is an enlarged detail view in diametrical
vertical‘ section showing the cylindrical wall sur
rounding the sampling hole and cover therefor
and the preferred mechanism for locking the
venting release of the cover so long as ?uid pres
sure in the receptacle is maintained.
_More particularly the invention relates to im
provements in stock dye kettles, or other recep
tacles, containing hot dye, or other liquid, which
is circulated under pressure through the stock in 10 cover in closed position; and,
Fig. 4 is an enlarged side elevation of the con
the kettle and which are provided with a sam
struction shown in Fig. 3.
pling hole or aperture through which a sample
of the stock in the kettle can be obtained, or the
condition of the material in the ‘receptacle can
Fig. 5 is a view partly in Vertical section of a
modi?ed form of mechanism for locking the
cover to the sampling hole in closed position.
be determined.
The dye kettle, which may be of any suitable
In usual dye kettles or the like the aperture is
construction preferably of the type illustrated in
provided with a cover which is clamped ?rmly
our patent aforesaid, for containing the stock to
over the aperture by detachable means so that
be dyed with means for circulating hot dye liquor
the cover can be removed to obtain access to the
material within the kettle. If the cover is re 20 through the stock is provided with a vertical
~ cylindrical wall I and the stock is supported upon
leased before the fluid pressure of the material
a suitable removable carrier having a central
is released the hot vapors issuing from the
tubular perforated standard through which heat
aperture is apt to injure'the operator.
ed dye liquor is forced under pressure into and
The principal object of the present invention
is to provide a safety cover construction for the 25 upon the material on the carrier. The upper end
of the standard 2 has secured to it a clevis adapt
sampling hole or aperture in the dye kettle or
ed to be engaged by means for lifting the carrier
the like, or more broadly stated to provide a cover
out of the kettle. The cylindrical wall I is pro
mechanism for closing an opening in a receptacle
adjacent its upper end with a peripheral
containing ?uid under pressure which cannot be
angle bar flange 3 having a rib 4 spaced from
released or removed so long as pressure in the 30
the wall I to provide a seat for a gasket 5 of suit
dye kettle or receptacle is maintained.
able material upon which the peripheral portion
A further object of the invention is to provide
of a cover plate 6 is'mounted. The cover plate 6
mechanism for more effectively clamping-the
preferably has an upwardly concave central por
cover upon the opening ‘and formaintainingthe
tion and a vertical wall 1 adjacent its periphery
cover in such clamped position until ?uid pres,
and is reinforced byradial girders 8 welded there
sure in the container is released.
to and to saidgperipheral wall and to a central
These and other objects andfqeatures of the‘. ' hub
10. A circular top plate 9 desirably is mount
invention will more fullyappear from the follow
ed upon the girders 8 to form a ?nished cover
ing description and the accompanying drawings
and will be particularly pointed out in the claims.
plate construction.
The central hub: I0 is se
by a bolt H. to the apex portion of diverg
Preferred embodiments of the invention, are ‘ ‘cured
ing lifting arms '12 having means (not shown)
illustrated hereinas applied to the cover plate
for swinging the cover plate construction up
of a stock dye kettle of the type illustrated and
wardly out of the path of the stock carrier of the
described in our prior Patent No. 2,275,818 grant- ,
ed March 10, 1942, but is adapted to othertypes 4.5 kettle when the latter is lifted out of the kettle.
‘A ?ange l3 complementary to the ?ange 3 on the
of dye kettles in which the hot dye liquor is cir~
upper end of the kettle extends outwardly from
culated in a closed container provided with a.
the wall 1 and overlies the periphery of the cover
sampling hole. 7Inasmuch as the » general 5 con- _
6. Suitable means are provided for clamp
struction of ’ the dye kettle is disclosed, in, our
prior patent aforesaid only? such upper portion 50., ing the cover plate construction upon the gasket
of the kettle and cover is illustrated herein vas is, "5, such as equally spaced clamps l4 pivotally
mounted in‘brackets l5 secured to the angle bar
necessary to illustrate the novel construction
?ange member 3 and provided with a screw l6
forming the subject matter of the present in} _
having a‘ headl'l to engage the ?ange l3 and
In the
1 is
a view, mainly‘in
, ‘ vertical
actuating handles 18.
The top plate 9 has a suitable opening H! to
permit access to the cover for a sampling hole
29 in the cover plate located in convenient prox
zontal position at right angles to the axis of the‘
piston rod Ill.
The ring 44 may be welded or
imity to the periphery of the kettle. A cylin
drical wall 2!, which is welded to the cover plate
6, surrounds the periphery of the‘ aperture 20;
plate 6.
The cover 22. for the sampling hole comprises
a ?at plate having a downwardly extending ?ange
3i, and is interposed between the upper end of
the cross head 32 and a ?ange 48 on the sleeve 33,
otherwise secured to the under face of the cover
A coiled spring 4i, which surrounds the latch
23 which telescopically surrounds the peripheral _normally forces the latch downwardly out of
wall 2! of the sampling hole.
ratchet-engaging position and likewise causes the
Suitable means are provided for locking and? l0. lever‘ 35 to depress the diaphragm into the posi
maintaining the cover in closed position so long
tion illustrated in dotted lines in Fig. 3.
as ?uid pressure is maintained in the kettle or
other receptacle.
In the.- operation of the device the carrier of
the kettle; is- loaded‘: 'With stock to be dyed, or
In the particular construction. illustrated; in
otherwise treated, while the cover plate is held in
Figs. 1 to 4 a ring 24, which is welded to or formed 15 open position. The cover plate is then swung to
integral with the cover, is spaced concentrically
closed position and secured ?rmly upon the kettle
a suitable distance from the flange 23 to form a
by the clamps l4;
seat for a gasket 25 to engage the upper end‘; of
The‘han'd hole cover 22 is then lowered through
the peripheral Wall 2| of‘ the samplingghole 28.
the opening l5 in the upper plate 8 of the kettle
The wall 2! and cover ?ange 23 desirably are 20 cover with its flange 23 telescopically surround
provided with suitable interengaging members
ing. the peripheral Wall 2! of the sampling hole.
adapted when interengaged tohold or clamp the
The cover is thenmanipulated to cause thepins
gasket of the cover tightly upon the peripheral
26, which extend outwardly from the wall 2i, to
wall 2! of the sampling hole. In the preferred
enter the vertical portion 21 of the bayonet slots.
construction the interengaging members com 25 The cover is then rotated in a direction to cause
prise a plurality of pairs of diametrically opposite
the pins to ride on the inclined-lower wall of the
pins 26 which are mounted upon andextend out
portion 28 of the bayonet slot, thus forcing the
wardly from the peripheral wall 21 of the sam
cover and its gasket. 25 downwardly and. ?rmly
pling hole. The ?ange 23 of the cover is provided
sealing it upon the upper end of the wall 2.1- of. the
with bayonet slots adapted to engage the respec 30 sampling hole.
tive pins 26 and comprise a. vertical entrance 2'!
When the hot dye liquor is. forced into the ket
which communicates with alaterally and Slightly
tle the vapors therefrom produce su?icient ?uid
upwardly extending slot 28 so that when the cover
pressure in the upper portion of the kettle to
is placed upon the wall 2| of the sampling hole
force the diaphragm 43' upwardly thereby. caus
the pins 2% will enter the vertical slot and upon
ing the piston rod M to raise the outer end‘ of the
rotative movement of the cover in a proper di
lever' 35 and raise the latch into engagement with
rection will force the cover downwardly so as to
the ratchet teeth 29. on the under face of the pro
compress the gasket 25 ?rmly upon the upper
jecting rim 3!) of the cover, thus locking the cover
end of the wall.
against reverse rotation and maintaining the in
Suitable means are provided for retaining the
terengaging members of the cover in locked posi-.
interengaging members in engagement so long
tion so long as ?uid pressure in the kettle, is
as fluid pressure is maintained in the kettle. In
the preferred construction illustrated a series of
By reason‘ of this‘construction the’cover is ab- I
ratchet teeth 23 are formed on the under face
solutely prevented from removal until release of
of the outwardly extending rim 30 of the cover
the ?uid pressure in the kettle‘ when the spring
and are adapted to be engaged by. a suitable latch
41 will force the latch downwardly into an opera
3| which is forced into such. engagement. by the
tive position. The rim of the cover can then be
?uid pressure within the kettle.
readily grasped by the hands of the. operator and
In the construction illustrated the latch Si‘ is
the cover reversely rotated and removed to’ per
integral with. or is secured to a cross head‘ 32‘ 50 mit sampling of the stock in the kettle or exami
which is reciprocably mounted in a sleeve 33 pro
nation of the conditions-which obtain within the
vided with an externally threaded lower end
which engages a blockw34‘ which is welded or
It will be noted that by reason of the ratchet
otherwise secured to the cover plate 6. A lever 35
and latch construction the cover may be rotated
extends diametrically through suitable openings 55 in a direction to lock the cover ?rmly in place
in the sleeve 33 and cross head 32 and is ful
even after ?uid pressure'has been generated in
crumed upon a pin 36 which is mounted in a boss
the'kettle as the latch will slide over, the‘ inclined
extending from the ‘wall of the sleeve 33. The
surface of the ratchet teeth and under suchcir
lever 35 is provided with a slot 37 which is en
cumstances the cover cannot be rotatedin the
gaged by a pin 38 which is mounted in the; cross
reverse direction to ‘disengage the bayonet slot
head and extends through the slot 31. The op 60 connection.
posite end of the lever 35'is likewise provided
A modi?ed form of the invention-for locking‘ the
with a slot 39 which is engaged by a pin 40 which
cover to the sampling hole in" closed position is
is mounted in the bifurcated end portion of a,
illustrated in Fig. 5 and comprises‘broadly an
piston rod 4!. The piston rod Al is mounted
arm which is pivotally mounted'upon‘ theperiph;
in a suitable packing gland (not 'shown) in the 65 eral Wall which surrounds the-sampling hole and
block 34 and is provided at its lower end with a
extends diametrically over the cover and is con
relatively thin disk 42 which engages a ?exible
nected centrally thereto with clamping means
diaphragm 53.
engaging the opposite end'of the arm to hold, the
The periphery of the diaphragm is clamped 70 cover in closed position and means operableby
between upper and lower rings 44 and Why a
the ?uid pressure in the kettletoprevent release
series of suitably spaced'screws 46. The ring
of the clamping means so long as ‘?uid-pressure
44 is so constructed that its upper surface will en- \
gage the inclined under face of the cover plates,
6 and the. lower faceof thering‘ wi1l,be in hori
is maintained in the kettle.
As illustrated in Fig. 5 a vertical ear or ears
75 49_ are welded to. the- peripheral wall 21 of the
opening it) and a lever 50, which is pivotally
mounted on the ear or ears 49, extends upwardly '
and .thence diametrically across the cover 22.
The lever 50 is provided with a stud 5|, located
centrally over the cover 22, the lower end of
which extends into the space between a pair of
bosses 52 and 53 which are preferably integral
with and extend upwardly from the central por
tion of the cover. The stud 5| is pivotallycon- .
boss 65., When ?uid pressure‘ in the kettle is red :
leased the spring 61 will force the pawl 64 down‘
wardly out of. engagement with the ratchet teeth .
63. The‘ hand wheel 53 may then be rotated in ,
a reverse direction sufficient to enable the rod 59'
to be swung outwardly over the end of the lever
59 to dotted position illustrated in Fig. 5. The
lever 50 may then be swung upwardly and later-,.
ally thusremoving the cover to the dotted posi
nected to the bosses52 and 53 by a pin 54. The 10 ‘tion illustrated in. Fig. 5, thereby uncovering the
sampling hole and permitting access to thecon
upper end of the stud extends through the lever
tents of thekettle. This construction presents}
50 and is secured thereto by a transverse pin 55.
certain advantages over that illustrated in Figs.‘v
The free end of the lever is provided with a bi
1-3 in that the cover is always connected to the
furcated end portion 56 and the upper edge of
plate of the kettle instead of being freely
the lever is provided with a curved portion 51 15
removable from it.
which forms a seat for a hand wheel 58 the hub
It is obvious that the invention is applicable to
of which is provided with a screw threaded bore
types of stock dyeing kettles or to any type
in which is mounted a screw threaded rod 59 hav
of receptacle containing ?uid under pressure
ing at its lower end an integral enlarged cylin
with respect to which it is desirable to have an
drical portion 60 which is journaled on a stud 6|
opening for determining the condition of the con
which is mounted in ears 62 which are welded to
tents of the receptacle.
and extend outwardly from the peripheral wall
It is to be understood that the preferred em
2| which surrounds the sampling hole 20. The
bodiment of the invention shown and described
cylindrical portion 60 of the rod 59 is provided
with a series of ratchet teeth 63 adapted to be
engaged by a locking pawl 64 which is slidably
mounted in the upper wall of an inverted hollow
cylindrical boss 65 which is Welded to the cover
plate 60 of the kettle. The locking pawl 64 is
herein is of an illustrative character and that
other forms of interengaging and'locking mech
detail in Fig. 3. In the construction shown in
Fig. 5 the lower end of the locking pawl 64 has an
hole in a stock dye kettle or the like containing
?uid under pressure and having a cover plate
under face of the ring 44 and clamped upon it by
wall, cooperating means on said cover ?ange and
wall operable upon rotation of the cover in one
direction to clamp the cover on said wall and
anism may be employed within the spirit and
scope of the claims.
Having thus described the invention, what is
forced into locking position by means subject to 30 claimed as new, and desired to be secured by
Letters Patent, is:
the ?uid pressure within the kettle which, as
1. Safety closure mechanism for the sampling
illustrated in Fig. 5, is similar to that shown in
with an outwardly extending cylindri
enlarged cylindrical portion 66 which, like the 35 provided
the sampling hole compris
piston rod 4|, shown in Fig. 3, is integral with
ing a cover for said sampling hole having a
or has secured to it a disk 42 which engages a
?ange telescopically and rotatably ?tting said
?exible diaphragm 43 which is mounted on the
a ring 45 and screws 46.
In the operation of the device shown in Fig. 5
the lever 50, which carries the cover 22, is swung
‘ upon rotation in the opposite direction to re
lease the cover therefrom, a peripheral rim on
to closed position, as illustrated in full lines in
said cover provided with a series of recesses, a
Fig. 5, so that the cover ?ts tightly upon the
gasket 25 and clamps the latter ?rmly upon the 45 latch reciprocably mounted on the cover plate
upper end of the peripheral wall 2! of the sam
pling hole. The rod 59 is swung about its pivot
6| into the bifurcated end of the lever 56 and the
hand wheel 58 then screwed down tightly clamp
ing the cover in place. When ?uid pressure builds
up in the kettle the diaphragm 43 is forced up
wardly thereby raising the locking pawl 64 into
engagement with a tooth of the ratchet 63,
thus preventing the clamping rod 59 and hand
wheel 58 from being swung out of engagement
with the lever 59 so that the cover cannot be re
of said kettle in cooperative relation to the re
cess in said rim, and means operable by the ?uid
under pressure in said kettle to maintain the
latch in engagement with a recess in said rim so
long as ?uid pressure in the kettle is maintained.
2. Safety closure mechanism for the sampling
hole in a stock dye kettle or the like containing
?uid under pressure and having a cover plate
provided with an outwardly extending cylindri
cal wall surrounding the sampling hole, compris
ing a cover for said sampling hole having a ?ange
telescopically and rotatably ?tting said wall, a
gasket between the end of said wall and cover,
complementary bayonet and slot connection on
It will be noted that the bifurcation in the end
of the lever extends somewhat beyond the ver 60 said ?ange and wall movable by rotation of said
cover into interengagement in which slots on the
tical position of the rod 59 and that the lower
are so inclined as to clamp the cover and
end of the hub of the hand wheel 58 is circularly
gasket upon said wall, a peripheral rim on said
curved to ?t upon the complementary circular
cover provided with a series of ratchet teeth, a
seat 51 upon the lever 50. This enablesthe rod
moved until release of the fluid pressure in the
59 to be swung su?iciently to cause a proper tooth
in the ratchet to be'engaged by the pawl 64 and
hold the cover down upon the gasket 25 with suf
?cient pressure to prevent the escape of any
gaseous ?uid under pressure from the sampling
latch mounted on the cover plate of said kettle
adapted to engage the teeth of said ratchet, and
means operable by ?uid under pressure in said
kettle to maintain the latch in engagement with
the ratchet so long as pressure in the kettle is
maintained, and means withdrawing the latch
from such engagement upon release of said ?uid
Suitable means are provided for releasing the
pressure to permit reverse rotation and removal
pawl when ?uid pressure in the kettle is relieved.
of said cover upon release of said ?uid pressure.
This desirably is accomplished by a coiled spring
3. Closure mechanism for the sampling hole
61 which is interposed between the cylindrical
portion 66 of the pawl and the upper wall of the 75 of a stock dye kettle or the like containing ?uid
@4110; £14:
under'pifess‘ure; andhaving a cover plate provid
ed: with ano‘utwardly extending cylindricaLwall
surroundingra' sampling hole, comprising‘a cover
for said samplinghole having a ?ange telescopi
sally» and rot'atably ?tting said‘ Wall,‘ algasket be
tween the end of said Wall and cover, comple
mentary bayonet and slotv connection on: said
?angev andiwall movableiby rotation of‘ said cover
intointerengagementtin which slots'onthe cover
kettle adapted to engage the teeth‘ of said 'ratch,
et', a," latch-operating leverxmounted on‘ the; cover
plate of said,kett1e,.a1 diaphragm Within saidket
tle subject to the ?uid. pressure therein having,
means engaging said lever' operable to maintain
said latch in engagement with said ratchet teethv
so long as pressure is‘maintained in said kettle,
and a spring'acting upon said latch to withdraw‘
it from engagement with, said ratchet teeth upon’
are? so’v inclined as to clamp the cover'and gasket 10 release of fluid pressure invthe kettle;
upon? said wall, a peripheral rim on said cover
provided with a series of ratchet: teeth, a‘latch
reciprocablyfmounted on the. cover plate. of. said
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