US2181755A - Sealing tool - Google Patents

Description

Nov. 28, 1939. ADAMSQN 2,181,755

SEALING TOOL Filed April 5, 193'? 2 Sheets-Sheet 1 l8 INVENTOR. ANDREW E. A DAMSON A TTORNEY.

Nov. 28, 1939. so 2,181,755

' SEALING TOOL Filed April 5, 1957 v -2 Shoots-Sheet 2 7 ATTORNEY.

Patented Nov. 28, 1939 UNITED STATES SEALING TOOL Andrew E. Adamson, Warren, Ohio, assignor to Brainard Steel Corporation, Warren, Ohio, a

corporation of Ohio Application April 5, 1937, Serial No. 135,188

1 Claim.

This invention relates to a sealing tool and more particularly toa device for deforming portions of overlapped metal strap ends and a sleeve embracing the same. The deformations consist of swaged or bent portions on the side edges of the overlapped ends and of the sleeve and to this end the sealing device includes a pair of clamping jaws having dies thereon for clamping the sleeve to the overlapped ends, the dies swaging or bending portions of the side edges of the assembled ends and sleeve.

The deformation of the sleeve and strap ends requires the application of a large force to the jaws and since the tool is manually operated 15 means must be provided to multiply the force exerted on the handle portions. My invention contemplates a novel force multiplying arrangement in which the force exerted by the primary or handle lever acts in a. straight line on a toggle 20 assembly connecting the jaws, means being provided to effectively prevent any canting of said primary lever thereby preventing any binding of the parts with consequent loss of effective force.

Another object of the invention is to provide a 25 tool for the purpose described having relatively few and easily constructed parts and which is strong, durable and compactly arranged. The arrangement of the elements of the tool is such that each element may be made sufficiently heavy 30 to withstand long and severe usage.

A further object of the invention is to provide a tool for the purpose described having a movable fulcrum for the primary operating lever, the movable fulcrum consisting of spaced parallel rack and pinion arrangements, parallel to and evenly spaced from the plane including the direction of application of the operating force on said lever.

These and other objects and advantages of the invention will become apparent from a consideration of the drawings and the following detailed specification.

In the drawings:

Figure 1 is a plan view of a preferred embodiment of the invention;

45 Figure 2 is a side elevation of the same;

Figure 3 is an end view of the tool of Figures 1 and 2; and

Figure 4 is a side view of a portion of the tool with a side frame plate removed.

50 The tool consists generally of the stationary frame including the two spaced parallel side plates 66 to which is attached the foot 62-66,

the clamping and deforming jaws 58 pivoted on the frame, the operating lever 65, and the hereinafter described force transmitting and multiplying means between the operating lever 85 and the jaws 58.

Side plates 66 are each provided with a vertically extending slot 36 and an integral arm 8| which is riveted or otherwise suitably secured to 6 the foot 62. An extension 66 is rigidly secured to the foot 62 and is provided at its free end with a downwardly bent portion 56 to form a support for the tool and to resist the overturning moment caused by the downward force exerted 10 on the operating lever 65. The seal forming jaws 58 having clamping lips 38 and extended portions 31 are pivotally mounted on spaced parallel pins 61 extending transversely through aligned apertures in the lower central portions of the side plates 66. To aid in maintaining the proper spacing of the plates 66, spacing collars 41 of the required width are interposed between the side faces of the jaws 58 and the inner faces of the plates 66.

A rack bar 6| having integral teeth 35 is positioned on the inner surface of each plate 66 adjacent a side edge thereof and is rigidly secured by the cap screws 12 threaded into the rack and by the bolt ll passing through both rack bars 6|, both side plates 66 and provided with the nut 86. The central portion of the bolt II is encompassed by a spacing sleeve to hold the parts in proper position.

Meshing with the teeth 35 of the racks 6| are the teeth 36 of the gears 63. The gears 63 are preferably cut from a fiat plate and are provided with integral arms 33 riveted or otherwise suitably secured to a block 64 which in turn is rigidly fastened to the handle 65. The gear 35 teeth 36 are circularly disposed about apertures in the members 63 receiving the pivot bolt 69 the outer ends of which pass through the vertically disposed slots 36 in the plates 66. It is thus made apparent that movement of the lever 65 40 results in vertical movement of the pivot bolt 69.

The extended portions 31 of the jaws 58 are forked as shown more clearly in Figure 3 and to these forked ends are pivoted the toggle links 89, 89' by means of the pivot pins 68. This construction provides for portions of the jaws being positioned in the space between the rack bars and being guided thereby. The pins 68 are held in position by locking pins 14. One of the links 89 is provided with a forked end having a transverse aperture to receive the pivot bolt 69. The width of this end is sufiicient to engage the inner surfaces of the gear members 63 to hold them in their proper spaced relation. The other of the links 89' is of uniform width with one end 6 ntting'within the forked end of the first link and apertured to receive the bolt 69 and with the other end pivotally attached to a jaw 88 as explained above.

Outward movement of the forked ends ll of the Jaws 88 results in inward movement of the lips 88 and the dies 16 carried with the jaws. In operation, the jaws are moved to retracted position by moving lever 65 to its uppermost position, the movement causing the pivot bolt 68 to move upward and the outer ends 31 of the Jaws to move inward. overlapped reaches of the strap and an encompassing sleeve are positioned adjacent the anvfl 11 and as the working portion of the jaws move together byreason of the downward movement of the handle 85 and pivot bolt 69, the lips 38 clamp the sleeve about the overlapped straps and the dies 15 cause a cylindrical or other shaped deformation to be made in the side edges of the assembled seal.

The provision of the double spaced rack and pinion fulcrum enabling the toggle assembly to be positioned within the same results in an exceedingly strong and rugged tool. Moreover, such interfitting of the parts enhances the compactness of the assembly with a consequent decrease in the weight thereof and an increase in its usefulness.

By the use of the substantially spaced racks and pinions the lateral stability of the operating or force transmitting members of the tool is insured and thus any danger of canting or binding of the parts is eliminated. This is especially true aromas toolis the D- andatapoint evenly spaced from the planes ofthe racks and pinions. This results in a material decrease in the. frictional losses of the tool and in the force required to be applied to the grip ll of thelever O! to cheat a given seal.

Asmanychangesmayb'emade inthespeciflc embodiment of my invention, as herein disclosed, without departing from my invention, the specific disclosure should be considered as illustrative rather than limitive of the invention, the scope of which is indicated by the following claim.

I claim:

A sealing tool comprising a base, a pair of sealing jaws pivotally mounted on said base, toggle levers pivotally connected with said Jaws for actuating the same, a pair of spaced parallel rack bars on said base. an operating lever having a forked end with arcuately disposed gear teeth on each fork meshing with the teeth of the rack bars, a pin spanning said forked end and positioned centrally with respect to said arcuately disposed teeth, means engaging said pin to guide the same for movement in a rectilinear path parallel with said racks, said toggle levers being pivotally connected with said pin and being partially within the forked end of said operating lever, portions of said Jaws being positioned in the space between the rack bars and being guided thereby.

ANDREW E. ADAMSON.

Images