US1424029A - Manufacture of swivel members - Google Patents

Description

4 s. w; PARSONS.

MANUFACTURE OF SWIVEL MEMBERS.

' APPLICATION FR ED-OCT- 2811919.

Patented July 25, 1922.

WITNESSES:

INVENTOR. Jlaar! W Parse/i5 BY I fi ATTORNEY.-

UNITED STATS TENT OFFICE.

STUART W. PARSONS, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE STANLEY WORKS, OF NEW BRITAIN, CONNECTICUT,'A CORPORATION OF CONNECTICUT.

MANUFACTURE OF SWIVEL MEMBERS.

Specification of Letters Patent.

Patented July 25, 1922.

Application filed October 28, 1919. Serial No. 333,950.

To all whom it may concern:

Be it known that I, STUART W. PARSONS, a citizen of the United States, and a resident of New Britain, county of Hartford, State of Connecticut, have invented certain new and useful Improvements in the Manufacture of Swivel Members, of which the following is a specification.

It is the object of the present invention to provide an improved method of manufacture whereby swivel members for hasp fasteners, strong and durable in character, may be economically made.

Briefly speaking, my improved method consists in first punching from a flat piece of sheet metal, preferably wrought iron, a blank having a ring and a post extending therefrom, then rounding the edges of the blank by pressing it between suitable dies, and then reducing the diameter of one end of the post to form a pintle.

In the accompanying drawing Fig. l is a view of a piece of sheet metal illustrating the steps takenin cutting swivel blanks therefrom.

Fig. 2 is a view of a blank.

Fig. 3 is a view of the blank after it has been shaped.

Fig. at is a view of the finished swivel member, and

Fig. 5 is a view of the swivel member attached to a plate, the latter being in section.

In carrying out my improved method, a fiat sheet of metal 10 is fed through a punch press having a set of dies to stamp out slugs leaving openings 11, and a second set of dies to punch out swivel blanks 12 having a closed ring 12 and a post 12 The sheet of metal from which the blanks are cut is preferably of wrought iron as it is sufiiciently malleable to permit shaping and at the same time a swivel member formed therefrom has great tensile strength.

After the blank is punched out, it is placed between two dies having counterpart grooves of the same configuration as the blank except that they are curved in cross section. The dies are forced with considerable pressure against the blank so as parts thereof substantially circular in cross section.

The next operation consists in reducin as by swaging, the diameter of the end of the post 12 to provide a pintle 12 and a shoulder 12 In Fig. 5, I hav shown the finished swivel member pivoted to a plate 13, the pintle 12 being rotatably fitted in an opening in the plate and the end of the pintle being headed as at 12 It will be seen that by proceeding in accordance With the present invention, the manufacture of the swivel member requires but relatively few operations and each of these operations may be quickly and simply carried out. The swivel member being formed of wrought metal is extremely strong and this is especially true since the ring thereof is continuous or unbroken.

I claim as my invention The improved method of manufacturing swivel members for hasp fasteners which consists in punching from a flat sheet of metal a blank having an unbroken ring and an integral post extending therefrom, then by suitable dies simultaneously shaping the ring and the post so that the blank is substan tially circular in cross section and of uniform diameter in all parts, and then reducing one end of the post to thus form a pintle.

STUART W. PARSONS.

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