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_ Oct. 29, 1946- J. H.‘ HlGGlNSON ET AL ’ 2,410,214 SAFETY MECHANISM FOR DYE KETTLES AND THE LIKE Filed Jan. 7, 1944 2 Sheets-‘Sheet 1 F/ 9/ Ag . ‘ ' //> ,1 8 irryé. ‘3(1- 29, 1946- J. H. HIGGINSON ET AL ' 2,410,214 SAFETY MECHANISM FOR DYE KETTLES AND THE LIKE Filed Jan. ‘7, 1944 :35 2 Sheets-Sheet 2 ’ 2,410,214 Patented Oct. 29, 17.943 UNITED STATES PATENT OFFICE 2,410,214 _ SAFETY MECHANISM FOR DYE KETTLES AND THE LIKE Joseph H. Higginson and Homerv C. Riggs, An dover, Mass, assignors to Riggs & Lombard, Inc., Lowell, Mass., a corporation of Massachu setts Application January 7, 1944, Serial No. 517,460 3 Claims. 1 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) 2 ' 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. 15 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 7 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 vided 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 40.v . 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- _ plate 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 vention. : . , v ‘ In the Fig. 1 is drawings: a view, mainly‘in ' , ‘ vertical 'i‘ section‘, , of '55 actuating handles 18. The top plate 9 has a suitable opening H! to 3 2,410,214 permit access to the cover for a sampling hole 29 in the cover plate located in convenient prox 4 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 maintained. 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 kettle. . 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. . 1 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. Y 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 2,410,214" 5 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 cover 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 other 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 cal wall surrounding 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. v 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, kettle. 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 cover 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 hole. - 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: 7 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 JOSEPH H'. HIGGINVSONL HOMER c. RIGGS.