US1618920A - Knife head and manufacture of the same - Google Patents

Description

Feb. 22, 1927e 1,618,920

F. H. DlcKsoN KNIFE HEAD AND MANUFACTURE oF Tas sfAuE Y Filed Ja'n. 2, 1926 I Patented F eb. 22, 1927.

UNITED STATES PATENT OFFICE.

FRANK H. DICKSON, OF AUBURN, NEVI YORK, ASSGNOR TO HENRY 6a ALLEN, OF vAUBURN, NEW YORK.

KNIFE'HEAD AND MANUFACTURE OF THE SAME.

Application filed January 2, 1926. Serial No. 78,892.

Figures 3 and 4 are, respectively, an end and a side view of the ball member.

Figure 5 is a sideview of the knife head blank. or body and the ball member assembled, therewith but not upset,

Figure 6 is a sectional view showing the assembled members in position in a holder for upsetting, .I n

Figure isa section on the hne 7 7 or Fig. G, y

Figures 8, 9 and v10 are, respectively, a plan View, a side view, and :an end view of the completed knife head, and

Figure 11is a view showing the ball niember provided with a plurality of studs.

According to the present invention, there is produced the main forging 1 having the usual elongated shank 9', the vertical rib 3, and the laterally-projecting flange portion or base 4. An opening 5 is formed through the base or flange portion 4 and the vertical rib 3 terminates short of this opening, as shown clearly in Fig. 1. There is also produced by forging a ball member 6 having a spherical head 7, a fin or stem S extending radially from the head, and a base 9 which is united with one edge of the stem and projects from the opposite sides of the same.A

Referring to Fig. 2, it will be noted that the wall of the opening 5 is flared or beveled in opposite directions from Y its middle toward the opposite faces of the flange portion 4 of the knife head blank. It will also be noted, on reference to Figures 3 and 4, that thestem 8 of the ball member is relatively thin and flat-sided while the expanded base 9 has an upper portion 10, the edge of which is beveled, and a lower stud portieri 11 of uniform diameter. kThe stem 8 also has a lateral elongation or extension 1:2Y

which is adapted to overlap the end of the rib 3 and may be pinned or riveted thereto.

The dimensions of the base portion or block 9 of the ball member are such that when it is engaged in the opening 5 the beveled part 10 will seat snugly in the upper bevel of the opening while A the .stud 11 will project through and depend below Vthe same, as shown in Fig. 5, the stock in the stud being suliicient, when upset, to completely lill the lower beveled half of the opening.. Instead yof providing the base of the ball member with a single stud 11, the same maybe provided with a plurality of studs 11a as shown in Figure 11, and the flange or base portion 4 of the main forging 1 will of course be provided with a suitable number of holes to` receive said studs. The two studs 11a and the holes in the base 4 to receive them may be comparatively small, so that one of said holes may not 'be located so close to the edge of the base 4 of the forging 1 as to sacrifice strength. Y

Preferably, the ball member is heated and is placed, inverted, in a holding die 13, as shown in Figures 6 and 7, with the head forging or body resting on the flat upper surface of the die .around the stud. The die includes a movable member 14 slida'bly mounted in its main body portion, and the two members of the diehave their opposed faces so shaped as to produce a spherical sock-et receiving the ball or sphere 7 and a groove accommodating the stem 8 and the rib 3. After the assembled parts have been firmly clamped in the die, a hammer 15 or other device is caused tostrike or exert pressure upon the upper end of the stud 11, upsetting the same and securely uniting the ball member and the head member. The upset stud will be flush with the flange portion of the head and will be securely locked thereto by reason of the double-bevel or .other inter-engaging formation originally given the parts.

It is to be understood that while hot riveting is preferred, the two members may be united by cold riveting, welding, brazing, or by any other method which will intimately join the parts, and that the doublebevel formation is only a preferred interengaging construction whereby the stud of the ball member will be locked in the opening in the body or head member.

y Having fully described my invention what I claim as new .and desire to secure by Let-- ters-Patent, is:- Y

l. The process of forming a knife head which conssts in forging a head member with a flange portion and an opening through said portion having a double-bevel Wall, forging a ball member with a base having a beveled portion to seat upon one bevel of the opening and a stud to project beyond the other bevel of the opening, and upsetting the stud against the last-mentioned bevel.

2. The process of forming a knife-head which consists in forging a head member With an opening therethrough having both ends iiared, forging a ball member with a stem and a base, supporting the ball member in inverted position with its base extending through the opening in the head member, and psetting the base of the ball member to iill the opening in the head member.

S. The process of forming a knife-head Which consists in forging a head member with a flange portion. having an opening therethrough and a rib terminatimiv short of the opening. forging a ball member having a stem, a sphere at one end of the stein7 and a base at the opposite end of the stem, securing the ball member in inverted position With the base extending through the opening in the head member and the stem overlapping the rib of said member, upsetting the base of the ball member upon the head member, and joining the stem of the ball member With the rib of the head member.

4.. The process of forming a knife head which consists in forging a head member with a flange portion and an opening` therethrough, forging a ball member With a lateral stud to engagethrough the opening, and simultaneously locking the stud in the opening and intimately uniting it With the flange portion of the head member at the opening,

the ball being thereby mounted in spaced relation to the flange.

5. A forged knife head comprising a head member having an opening and a ball inember having a radial stud entering said opening and rigidly7 secured therein whereby said ball member is rigidly secured to the head member at said opening with the ball spaced from the head member. Y

6. A forged knife-head comprising a head member having a rib and an opening adjacent the end of the rib, and a ball member having a stem joined to said iib and a base upset in the opening.

7. A. forged knfe-head comprising a head member having an opening therethrough with both ends of the opening flared and a rib terminating short of said opening, and a ball member having a stem projected laterally a d united with the rib and a base upset in the fiared ends of the opening.

8. Means for producing forged knifeheads including clamping members presenting a spherical socket and a groove leading therefrom to receive the rib of a head member and the sphere and stem of a ball member assembled with the head member, and a pressure device cooperating With the clamping members to upset the end portion of the stem of the ball member.

9. A forged knife head comprising a head member having' an opening therethrough, and a ball member having a radial shank locked in said opening and intimately united With the head member at the opening, the ball being spaced from the head.

In testimony whereof, have signed this specification.

FRANK H. DICKSON.

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