US2146358A

US2146358A - Bumping hammer

Info

Publication number: US2146358A
Application number: US100103A
Authority: US
Inventors: Elmer J Seiden; Frank E Mazurek
Original assignee: SEIDEN
Current assignee: SEIDEN
Priority date: 1936-09-10
Filing date: 1936-09-10
Publication date: 1939-02-07
Anticipated expiration: 1956-02-07

Description

Feb.'7, 1939. f v E. 41. SEID E 'N ET AL 2,146,353

7 BUMPING HAMMER I iled Sept. 10, 1956 '2 Sheets-Sheet l ELMEF? JEE/DEN A 2 FRANKE. MAzL/R K Feb. 7', 1939. Y E. J. SEIDEN ET AL I 2,146,353

BUMPING HAMMER Filed Sept. 10, 19.36 2 Sheets-Sheet 2 gwucm tom E1. MER J EE/UEN 12. 2

FHA \IKE. MAZUFEK Patented Feb. 7, 1939 UNITED STATES 2,146,358 BUMPING HAMMER Elmer J. Seiden, Jackson, and Frank E. Mazurek, Pontiac, Mich. said Mazurek assignor to said Seiden Application September 10, 1936, Serial No. 100,103

7 Claims.

This invention relates to bumping hammers particularly for the straightening of the sheet metal portions of automobile bodies such as fenders or the like and more particularly to an attachment for supporting a dolly in operative position with respect to the hammer.

Heretofore C frames have been used in combination with bumping hammers and dollies for n operatively positioning dollies with respect to the bumping hammer. However, with heretofore known constructions there has been the disadvantage that it has been diflicult to position the combination for straightening certain irregular body portions due to the fixed relation of the hammer and the dolly. Another difficulty has been that the fixed relation between the hammer handle and the dolly supporting frame has made straightening under certain conditions not mentioned difliculties and has as an object to provide a bumping hammer pivotally connected to a dolly supporting frame.

Another object of the invention is to provide a pivotal connection for adjusting not only the angular relation of the hammer with respect to the dolly supporting frame but also the position of the hammer handle with respect to the frame while retaining the hammer body in normal position.

These and other objects will be apparent from the following specification when taken with the accompanying drawings, in which Fig. 1 is an elevation of a bumping hammer according to the present invention having the dolly and dolly supporting frame attached,

Fig. 2 is an exploded view of the bumping hammer and its connections with the dolly supporting frame,

Fig. 3 is a plan view of the dolly supporting frame attachment portion,

i Fig. 4 discloses the angular adjustment-of the hammer handle with respect to the dolly supporting frame, and

Fig. 5 illustrates the angular adjustment of the bumping hammer with respect to the dolly.

Referring particularly tothe drawings, reference character I indicates a bumping hammer which may be of any desired design but prefer ably is that disclosed in the copending application of Ehner J. Seiden, Serial No. 38,398, filed August 29, 1935 (Patent No. 2,120,992, granted June 21, 1938). The hammer is provided with abody 2, a head 3, a handle 4 and a controlling lever 5.

The end of the body 2 opposite the head 3 is provided, as shown particularly in Fig. 2, with a tapped bore 6. Over the tapped bore 6 is positioned a plug I having a base 8 with a concave recess 9 for receiving the curved end of the hammer body 2. The plug 1 is rigidly secured to the 1 hammer body 2 by a bolt I0 passing through the center of the plug I and threaded in the tapped bore 6. A recess I I in the outer end of the plug I receives the head of the bolt Ill.

A frame I5, generally C-shaped in configuration supporting at one end the dolly I6 in operative relation to the hammer head 3, is secured to the hammer I by an attachment portion I! connected to the plug 1. The frame I5 may take various forms for facilitating the disposal 2 of the sheet metal part to be straightened between the head 3 and the dolly I6 and it is to be considered that the frame I5 illustrated in Fig. l is merely one form which the frame may take.

The attachment portion I I includes a split collar or cylindrical portion I8 into which one end of the frame I5, preferably cylindrical in form, is disposed. The split collar I8 is clamped on the frame I5 by means of a thumb screw I9 passing through a lug 20 and threaded to a lug 2!. In order to provide a fixed angular relation between the attachment portion I1 and the frame I5, a pin 22 passing through and secured to the frame I5 normally seats in a recess 23 in the collar I8.

Perpendicularly disposed to the split cylindrical portion or collar I8 and comprising a portion of the attachment portion I1 is a socket 24 for receiving the plug I. Threaded into the side of the socket 24 is a thumb set screw 25 for engaging with a peripheral groove 26in the plug I for locking the socket 24 to the plug I.

Fig. 1 discloses the normal operative relation between the hammer I and the dolly It. In operation the sheet metal part to be straightened is disposed between the hammer head 3 and the dolly I6. The hammer I is then actuated by manipulating the controlling lever 5 and the hammer I is moved over the part to be straightened. During the straightening operation should it be more convenient to change the angular relation between the handle 4 of the hammer I and the frame I5, it is merely necessary to loosen the thumb set screw 25 and rotate the handle 4 together with the body 2 about the axis of the plug 1 as shown particularly in Fig. 4. During this motion the set screw 25 although loosened continues to engage with the peripheral groove 26 in the plug '1 and prevents removal of the plug 1 from the socket 24. When the ad justment of the angle between the handle 4 and the frame l5 has been made, the thumb screw 25 may then be tightened locking the parts in their adjusted position.

In performing certain types of straightening operations to sheet metal parts such as on an automobile body, it is often necessary to pass over enlarged body parts such as structural frame members or perhaps badly deformed sheet metal parts. In these cases the clearance between the hammer head 3 and the dolly I6 is insuflicient. In order to increase the clearance, the thumb screw [9 is loosened, the attachment portion I! backed away from the aligning pin 22, and the entire hammer I rotated about the longitudinal axis of the attachment portion [1 as shown particularly in Fig. 5, thus providing a greatly enlarge clearance between the hammer l and dolly l6. When the dolly I6 has been disposed in the location desired the hammer I may then be rotated about the longitudinal axis of the attachment portion I until the pin 22 is in alignment with the recess 23. The thumb screw [9 is then tightened and the hammer is ready for operating. Of course, it will be understood that the handle 4 may be adjusted as hereinabove described to facilitate positioning the hammer head 3 and dolly IS with respect to the work if necessary.

In practice the hammer head 3 and dolly 16 each may take various forms depending on the sheet metal part to be straightened. Accordingly, they should be respectively removable. The frame [5 may be satisfactorily constructed of tubing although the invention is not limited to such a form. Furthermore, the plug 1 may be included as an integral part of the casting comprising the body 2.

Having thus described our invention what we desire to protect and secure by Letters Patent is:

1. A device of the character described comprising a bumping hammer portion, an attachment portion, a cylindrical plug on one of said portions, the other portion having a cylindrical socket, said plug being disposed rotatably in said socket, the rotative axis of said plug and the operative axis of said hammer portion being in alignment, a dolly, a frame for supporting said dolly in operative position with respect to said hammer, means for detachably securing said frame to said attachment portion, a seat on the end of said attachment portion, and means on said frame for cooperating with said seat to provide a predetermined angular relation between said frame and said attachment portion.

A device of the character described comprising a bumping hammer portion, an attachment portion, a plug on one of said portions, the other portion having a socket, said plug being disposed in said socket and rotatable therein, means to lock said plug against axial movement from said socket, a dolly, a frame for supporting said dolly in operative position with respect to said hammer, means for detachably securing said frame to said attachment portion, a seat on the end of said attachment portion, and means on said frame for cooperating with said seat to provide a predetermined angular relation between said frame and said attachment portion.

3. A device of the character described comprising a bumping hammer portion, an attachment portion, a plug on one of said portions, the other portion having a socket, said plug being disposed rotatably in said socket, a dolly, a frame for supporting said dolly in operative position with respect to said hammer, a split collar form-- ing a part of said attachment portion, means to clamp said split collar on said frame, a seat on the end of said attachment portion, and means on said frame for cooperating with said seat to provide a predetermined angular relation between said frame and said attachment portion.

4. A device of the character described having a bumping hammer portion, an attachment portion, a plug on one of said portions, a peripheral L groove on said plug, the other portion having a socket, said plug being disposed in said socket, means secured to said socket for engagement with said groove to lock said attachment portion with said hammer, a dolly, a frame for supporting said dolly in operative position with respect to said hammer, and means for securing said frame to said attachment portion.

5. A device of the character described having a bumping hammer portion, an attachment portion, a plug on one of said portions, a peripheral groove on said plug, the other portion having a socket, said plug being disposed in said socket, means secured to said socket for engagement with said groove to lock said attachment portion 5 secured to said socket for engagement with said groove to lock said attachment portion with said hammer, a dolly, a frame for supporting said dolly in operative position with respect to said hammer, a split collar forming a part of said attachment portion, the axis of said collar being perpendicular to the axis of said socket, and means for clamping said collar on said frame whereby said hammer may be pivotally adjusted with respect to said attachment portion and said hammer and attachment portion may be pivotally adjusted with respect to said frame.

'7. A device of the character described comprising a bumping hammer portion, an attachment portion, a plug on one of said portions, the other portion having a socket, said plug being disposed in said socket, a dolly, a frame for supporting said dolly in operative position with respect to said hammer, a split collar forming a part of said attachment portion, means to clamp I said split collar on said frame, and means for establishing a predetermined relative position between said frame and attachment portion.

ELMER J. SEIDEN. FRANK E. MAZUREK.