US88783A - Improvement in bolt-machines - Google Patents

Description

e @that MOORE HARDAWAY, OF ST. LOUIS, MISSOURI.

Lette/rs Patent No. 88,783, dated April 13, 1869.

IMPROVEMENT IN BOLTfMACHINS.

The Schedule referred to in these Letters Patent and making Patil of the name.

To all whom 'it ma/y concern:

Be it. known that I', MOORE HARDAWAY, of St. Louis, in the county of St. Louis, and State of Missouri, have invented certain new and useful Improvements in Machines forMaking Bolts and Rivets; and I do hereby declare that the following is a full, clear, and exact description thereof, and of their mode or manner of operation, reference being had to the accompanying drawings, and to the letters of reference marked thereon, and making a part of this specification.

My present invention is an improvement upon that for which Letters Patent of the United States were granted to me on the 11th day of October, 1864, and consists in certain improvements in the construction and operation of the die-bok and dies for forming the head of the bolt or rivet, by means of which the formed bolt is more quickly and absolutely released from such dies, and any possible injury or strain to the parts is more certainly prevented. j

Figure 1 is a general perspective view of the machine, its several parts in the position they have when the bolt is completed, a portion of the jaws that hold the bolt being broken away to better show the die.

Figure 2 is a like view of the machine, when the die'aud die-box are drawn b ack, and the jaws that hold the bolt are opened, and the bolt discharged.

The construction and operation of the clamps or jaws d al', which seize and hold the iron rod while the head of the bolt or rivet is being formed, and the forward and backward movement of the die-box I) and die c, and of the plunger or header lt, are substantially the same as described in my former patent.

In the machine as patented to me in 1864, the diebox b was solid, or substantially the same as a single piece of metal, and carried in a suitable recess, made in its end, the die c, which was also solid, or made of a. single piece of metal.

In suchmachine, the plunger, or header k, when forced against the end ofthe blank bolt, upsets such blank, and forms the head thereon, which is made to ll and take the configuration of the die c.

The head of the bolt thus closely filling the die c, when the die and die-box are drawn back, it necessarily requires some considerable force to disengage or draw the die from off the bolt-head the die is thus liable to become more or less injured, and the several parts to be, in some degree at least, strained.

To cause the bolt-head to be at once and wholly released from the die c, and at the beginning of its backward movement, and thus overcome or remove all danger or liability of strain and injury to the parts, in

disengaging the bolt from the dies, I make the diebox b in two parts, 1 2, one part, 1, of such box being connected with the lever f, which is actuated by the cam h., and by which the die-box is moved forward at the proper time, and the other part, 2, of such box connecting with the former by a pivot, or its equivalent,

on which, as a centre, such part can have a little lateral movement, so that the two parts, 1 2, can approach to and recede from each other.

On the side of such part 2 of the die-box is fixed a projection, p, having an inclined outer surface, which, as the die-box is carried forward in the direction of the arrow, by the action of the cam h, -strikes against the inner surface, also inclined, of the standard r, such inclined surface being indicated by the dotted line, and forces the two parts of the die-box toward each other, as such box is further advanced.

The die c, which is within the die-box, and by which the head of the bolt is formed, is also made in two parts, 3.4, instead of being made solid, as in the former machine, one part, 3, of such die being attached to and moving with the part 1 of the die-boX, and the other part, 4, of such die-box being attached to and moving with the other part 2 of the die-box.

lhe inner faces or surfaces of the two parts 3 4, of

' the die c, are planed and smoothed, so that when the two parts of the die are brought together by the movement of the die-box, they will t closely, and will make a tight joint", leaving no space between them, and the -inclined surfaces p and r, on the die-box and on the standard r, are so arranged that when the diebox b,

with its enclosed die, is carried forward, up to and against the clamps or jaws d d', the two parts 3 4, of the die c, will be forced tightly against each other, thus forming, in fact, a solid die.

As the two parts of the die-box are thus moved toward each other, and the opposite parts of the die are brought in close contact, the plunger or header k, is forced forward, upsetting the end of the forming the head on the bolt in the die c.

The head having been formed on the blank, the diebox and its enclosed die, are given a backward motion,

and at the very beginning of such movement, the opposite parts of the die-box b and die c open or spread from each other, and thus at once release the head 'of the bolt from the die, so that the backward movement of the die, and its enclosing-box, is wholly free from any resistance whatever, and no more power is required to carry it back, except to move its own weight,

and hence, all strain, or possible injury of the parts is entirely avoided.

Such construction of the die-box and die, in two parts, not only simplifies the action of the machine, but also much reduces the cost of constructing the dies required in its operation.

What I claim as my invention in machines for making bolts, 85o., and desire to secure by Letters Pat ent, is-

The combination of the divided die c, divided diebox b, inclined surfaces p fr, and header k, arranged and operating substantially as described, with the clamp dies d al', for the purposes set forth.'

MOORE HARDAWAY.

Witnesses:

S. D. LAW, FRED B. SEARS.

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