US2125767A - Full removable drum head clamping ring - Google Patents

Description

Aug- 2, 1938. R. CAMPBELL ET AL 2,125,767

4FULL REMOVABLE DliUM HEAD CLAMPING RING Filed March 19, 1935 3 Sheets-Shea?I 1 Fica. 3 5054 58 6.0 i612 Idol. 7B Pracr Aug. 2, 1938. R. CAMPBELL ET Ar.

FULL REMOVABL DRUM HEAD CLAMPING RING Filed March 19, 1935 s sheets-sheer :a

D u I4 A14/l, .w 63/ u ,2 HYA. o, y ndi xlllw Il. .41! 2 55 wf 1% Nm J0. m .B

Aug. 2, 1938. R. CAMPBELL ET AL I FULL REMOVABLE DRUM HEADVGLAMPING RING I 3 Sheets-Sheet 3 Filed March 19. 1935 Patented Aug. 2, 1938 RIN Robert Campbell, West Island, N. Y., and .lohn N. J., assignors to Atlas tion, Bayonne, N. J., Jersey` New Brighton, Staten R. Proctor, Bayonne, Steel Barrel Corporaa corporation of New Application March 1t), 1935, Serial No. 11,884 1,2 claims. (o1. 22o- 61) Our invention relates to open-ended receptacles o-r drums and has particular reference to mecha-4 nism for insuring a duid-tight seal between the closure member and the open end'of the drum.` i It is customary, particularly in conjunction with the shipment of fluids such as oil, etc., to providey an open-ended metallic drum having a rolled bead extending around the outerperiphery of the open end. A closure member having an outer marginal flange adapted to seat upon the aforesaid bead is positioned over `the open end of the drum and some suitablemechanism associated with the drum anddrum head assembly for maintaining a fluid-tight seal.

Heretofore it has been quite common practice to use a sor-called full removable clamping ring, v channeled in cross section, to embrace the drum head flange and drum bead for the purpose of making and maintaining the seal. It isl apparent that such a clamping ring must be so `designed as to render it `easily associated with the drum and drum head assembly. To that end the ring is customarily split and some mechanism provided for connecting the two ends of thering and .drawing the same together tightly about the superposed flange and bead. Heretofore linkage of one type or another, as well as bolts threaded through lugs secured to the ends of lthe ring, have been used with some degree of success. Such mechanisms for drawing the ring tightly about the bead of the flange, however, possessy certain inherent disadvantages, such as a 'tendency to bind as the ends are `drawn together, lack of capacity insofar asadaptability to dif-` ferentsized drum and drum head assemblies is concerned, etc. c

A broad object of the invention is to insure easeV of placing and removing the ring vandtor obtain uniform travel of each half thereof, thereby `insuring perfect seating around the full circumference .and at the same time drawing up the open ends of the ring snugly. i l A further object is to eliminate the disadvantages which have been found in other clamping rings and to provide a means for drawing the ring about the drum and drum head assembly which will eliminate all possibility of binding. This object is accomplished by providing a novel ring end drawing means which functions first to seat the ring firmly against the superposed drum', bead and head flange at a point diametrically opposite the split ends of the ring and subsequently draws each half or segment of the ring about the drum with a sort of fwrapping acmeans of rivets 28.

V UNITED STATES PATENT. OFFICE tion until the entire ring is clamped rmly about the drum. Y

Still another object of the invention is to provide for a substantial amountof adjustability in the ring end drawing mechanism, thereby enlarging the capacity of the stan-dard ring for use with drum and drum head stock of varying dimensions.

Y, Various other objects of the invention willbe apparent from the following description taken in conjunction with the drawings, wherein: Figure l is a plan View of the ring end drawing mechanism, showing the ring in full closed position,`

`Figure 2 is a plan view of the locking means provided for the operating member ofthe ring end drawing mechanism,

Figure 3 is a section through line 3--3 of Figure 2,

tially closed position, respectively.

Conventional metallic drums are usually provided with an outer peripheral rolled bead l upon which the marginal flange l2 of a drum head lll is adapted to seat. Itis customary to provide a gasket I6 between the drum bead and l the drum head flange for the purpose of obtain-r ing a more perfect seal between the closure member. Y

A channel-shaped clamping ringV i8 is provided at oradjacent its split ends with inwardly extending lugs 20, which are provided with slots 22 and 23 extending diagonally downward `towardthe split ends of the ring. These lugs may be Welded or otherwisesecured to the ring, or they may be integral therewith.V Rack arms 24 and 26, respectively, are pivoted in the slots, as by It will be noted that the pivot point of rack 24 is disposed laterally away from and below the pitch line of the rack teeth. This insures an inward pull on its respective ring end as the rack iis moved.

. A rack and pinion guide 29; including upper and lower guide plates 30 and 32, receives a knurled stud 34 which projects .downwardly through and beyond the lower guide plate. vAn interiorly broached pinion 36 is mounted upon drum and its 42 extending transversely through the lower portion of said stud.

Referring to Figures 4-7, itis to be noted that the upper guide plate 30 is provided with downwardly struck end portions 3| and 33 which are adapted to fit into openings 35 andY 31 in the lower guide plate 32. In assembling the mechanism, pinion 36 is first pressed over the knurled stud 34 and the head of the stud is positioned in opening 33 of the upper guide member. The openings in lower guide plate 32 are then positioned over the downwardly struck ends 3| and 33 of said upper guide member, which ends are peined as illustrated at 4l. As is apparent in Figure 4, the opening 40 in locking lever 38 is pressed over the knurled stud 34, which extends downwardly through an opening 44 in the lower guide plate. It is to be noted that the lower guide plate is provided with an outwardly extending portion 46, the function of which will be described more clearly hereafter. The locking racks are next inserted by placing locking lever 38 in wide open position and then moving the lever so that both racks enter the guide simultaneously.

When the ring is in full opened position, ready to be placed over the barrel, the rivet pivots in the racks are forced to the upper ends of the slots 22 and 23, away from the ends of the split ring as illustrated in Figure 8. Subsequently, as the lever is moved across the face of the drum head to locking position, guide 29 floats toward the inside edge of the head flange until the extension 46 on the lower guide plate abuts said flange. During such movement the ring I seats firmly against the drum bead and head ange assembly at a point diametrically opposite the position of the guide. This is clearly illustrated at 48 in Figure 9. During this initial locking movement the ends of the split ring I0 will'be drawn tangentially toward one another, but such ends will not be drawn inwardly toward the drum to any substantial extent. The rivet pivots remain at the upper ends of the slots during this movement.

On further movement of the locking lever the twohalves or segments of the ring I3 will be progressively wrapped snugly around the drum bead and head flange assembly from the point 48 and the ring ends will begin to draw in more rapidly toward the drum, in addition to approaching one another. It will be apparent that guide 29 has now become an anchor by reason of the fact that the extension 46 of the lower guide plate has come to rest against the head flange. Therefore, as illustrated in Figure 1, nal movement of the locking lever will tend to draw the ends of the ring inwardly as well as together because the guide is no longer free to float after it has anchored against the drum flange.

On completion of movement of the locking lever the parts will be in the position illustrated in Figure 1, the slots 22 and 23 in the lugs having been drawnv along the rivet pivots 28 during the nal locking movement as the ends of the ring are drawn up snugly to embrace the drum bead and head flange. l

Means are provided for retaining the locking lever in full locked position, such means having been shown for illustrative purposes as constituting a lug U which may be welded or otherwise secured to the ring. This lug is provided with a depending stop flange 52. The lever 38 is of spring metal and, having been forced under the top flange 52, will be held in position thereby. A slot 54 is provided in lug 50 with which a corresponding slot 56 in lever 38 is adapted to register when said lever is in full locked position.

To insure against opening of the container or drum during shipment, a pin 58 may be inserted through the registered slots 54 and 56 and wired as indicated at 60. Often the wire 50, threaded through the registered slots, is sulicient, it being apparent that this is not intended as an effective locking device and can merely indicate that the contents of the drum have been tampered with during shipment.

By reason of the simultaneous and progressive wrapping action of each l80-degree segment of the ring after the same has anchored against the drum at 48, all binding of the ring as the same is drawn about the closure assembly is eliminated. This easy, effective wrapping action insures rapid placement of the ring in position and locking of the same to insure a fluid-tight seal. By reason of the floating ring end drawing mechanism a ring of given circumference may be opened substantially wider than other rings of the same circumference, thereby insuring ease of handling and adaptability for drum head assemblies of varying sizes.

A further important feature of the invention resides in the adjustablity provided by the operating mechanism. It will be apparent that lock ing arm 38 may be removed from the knurled stud 34 and positioned as desired to provide any arc of swing suitable for the particular drum being closed. Furthermore, the pinion may be rotated with reference to the knurled stud to provide the same sort of adjustability, thereby considerably widening the range or capacity of the clamping ring. Variations in gasket size, furthermore, frequently necessitates such range of adjustability.

It will be noted that an effective closing force is available at all points of the locking levers swing. This is in contradistinction to the action of the more conventional closing mechanism wherein linkage is operated by a lever for the purpose of drawing the ring ends together. The link type of closure mechanism cannot exert any closing force after the linkage has reached dead center.

While one particular means of rotating the pinion to actuate the ring end drawing racks has been illustrated, it will be apparent that a spring pawl arrangement may be utilized with equal success for this purpose. Having illustrated a preferred form of our improvement, modications thereof will be obvious to those skilled in the art and for that reason we wish to limit ourselves only within the scope of the appended claims.

What we claim is:

1. In combination with a split clamping ring adapted to embrace the head and ilange of an assembled drum and removable drum head, a manually operable assembly pivotally associated with and bodily movable with reference to the ends of the ring and connecting the same operable to first draw the ring firmly against the head and flange at a point diametrically opposite the split portion of the ring and subsequently wrap each half of said ring progressively about the head and flange.

2. In combination with a split clamping ring adapted to embrace the contiguous head and flange of a drum and removable drum head assembly, means within the ring enclosure con` necting the ends thereof and movable bodily with reference thereto for drawing the ends together, said means including a member adapted to float against the inner face of the drum head iiange and form an anchor for the closing ends.

3. A full removable drum head clamping member comprising a split ring having inwardly extending lugs at' the ends thereof, rack arms pivoted to said lugs, a guide member positioned between said lugs slidably receiving said rack arms, a pinion rotatably mounted in said guide in operative relation to said racks, and means for rotating said pinion.

4. In combination with a split ring, ring end drawing mechanism including a pair of arms connected with the ends of said ring through a lost motion connection and means connected with each of said arms operable to draw the same together.

5. A clamping member including in combination a split ring, rack arms pivotally connected With said ring adjacent the ends thereof, and a pinion positioned between said ring ends by said rack arms.

6. A clamping member including in combination a split channeled ring, rack arms pivotally associated with said ring adjacent the ends thereof, a pinion and guide assembly operatively receiving the ends of said rack arms, and means for rotating said pinion to draw said ring ends together.

7. A clamping ring including in combination a split channeled ring, an arm associated with each respective end of said ring, an independent member intermediately disposed with reference to said ring ends adapted to receive said arms, and means associated with said member movable substantially within the plane of the ring and cooperable with said arms for continuously drawing each ring end toward the other with substantially equal increments of movement.

8. In combination with a split clamping ring adapted to embrace the contiguous head and flange of a drum and removable drum head assembly, means within the ring enclosure connecting the ends thereof and movable bodily with reference thereto for drawing the ends together, said means including a member adapted to float against the inner face of the drum head flange and form an anchor for the clos ing ends during the latter portion of their closing movement and exert pressure on the wall of the cover flange opposite the split in the ring after complete closure.

9. The combination with an open-ended container having a bead extending around the outer periphery of its open end and a removable cover having a marginal flange oiset from the plane of the Cover Seated upon said bead, of a split channeled closure ring adapted to embrace said bead and flange to clamp them together, and means for contracting said ring about said bead and flange including a pair of arms pivotally connected with the ring ends and means operable on the free ends of said arms to draw the ring ends towards one another, said last-mentioned means including a, member operable during contraction of the ring to contact the Wall of said flange intermediate the split ends of the ring and exert radial pressure outwardly thereon without relative movement between the contacting parts and to maintain pressure thereagainst after the ring is fully contracted.

10. In combination with a split clamping ring adapted Vto embrace the head and iange oi an assembled drum and removable drum head including a wall oiTsetting said ilange from the plane of the head, a manually operable assembly pivotally associated with and bodily mov able with reference to the ends of the ring connecting the same and operable to irst draw the ring irmly against the head and flange at a point diametrically opposite the split portion of the ring and subsequently wrap each half of said ring progressively about the head and ange, said assembly including a member operableduring contraction of the ring to contact the wall of said flange intermediate the split ends of the ring, and exert radial pressure outwardly thereon without relative movement between the contacting parts and to maintain pressure thereagainst after the ring is fully contracted.

11. The combination with an open-ended container having a bead extending around the outer periphery oi its open end and a removable cover having a marginal flange oiset from the plane of the cover seated upon said bead, of a split channeled ring adapted to embrace said bead and ilange to clamp them together, and means for contracting said ring about said bead and flange, said means comprising arms in pivotal connection with the ends of said ring, a member disposed intermediate the split ends of said ring for receiving the free ends of said arms, means positioned by said member operable to draw said arms towards one another with substantially equal increments of movement, and means associated with said member operable during contraction of the ring to contact the wall of said iiange intermediate the split ends of the ring and exert radial pressure outwardly thereon without relative movement between the contacting parts to thereby assist in centering the ring about the drum head assembly and induce simultaneous wrapping action of each 180-degree sector of said ring.

12. The combination with an open-ended container having a bead extending around the outer periphery of its open end and a removable cover having a marginal flange offset from the plane of the cover seated upon said bead, of a split channeled ring adapted to embrace said bead and flange to clamp them together, and means for contracting said ring about said bead and ange, said means including an arm associated with each respective end of said ring, an independent member intermediately disposed with reference to said ring ends adapted to receive said arms, and means associated with said member cooperating with said arms for drawing each ring end toward the other, said member including means operable during contraction of the ring to contact the Wall of said ange intermediate the split ends of the ring and exert radial pressure outwardly thereon without substantial relative movement between the contacting parts and to maintain pressure thereagainst after the ring is fully contracted.

ROBT. CAMPBELL. JOHN R. PROCTOR.

Images