and such likes
Year: 1888

page_text: and such like Articles.
WO ANDREW LAUNDRY of the Village of Coté St. Paul District of Montreal
Province of Quebec, Canada Foreman of Hammer Factory and HENRY HARRISON
WARREN of the Village of Massena in the County of St. Lawrence State of New
York United States of America Gentleman do hereby declare the nature of this inven-
tion and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
This invention relates to the construction and arrangement of dies, made with
diagonal ribs and set face to face so that when the one is moved parallel to the
other a round bar is rolled between them and has imparted to it the helical twist
form required (for so called) "pods" of augers, and such like articles.
In the accompanying drawings similar letters of reference indicate like parts.
Fig. 1 is a diagram shewing the improved dies as arranged in connection with an
ordinary power press. Fig. 2, is a front elevation to an enlarged scale of one of
the dies. Fig. 3 is a section of the pair of dies, on line x of Fig. 2 shewing the
cross section of a bar rolled by them. Fig. 4 is a section of the dies on line <¹, of
Fig. 3, showing the longitudinal section of the bar rolled by them.
A, A, are the two dies each made with diagonal parallel ridges B, of size
determined by the twist required in the bar to be acted upon; and of shape that
may be varied, but as shewn they are nearly semi-cylindrical.
:
The line, Fig. 2 indicating the direction in which the one die moves along
the other the angle that the ridges B make with the line x, is governed by the
pitch of the twist desired. F and G are marginal surfaces without ridges which
may be slightly inclined as shewn to make the neck F and point H conical or F
may be made parallel to give a cylindrical neck at F. The point H is left at the
end of the pod I for forming the gilet screw and the margins F, form the
beginning of the shank K. The formation of the gimlet screw at the point and
the completion of the shank forming no part of the present invention may be effected
in any known manner after the "pod" has been formed.
As shewn in Fig. 3 the faces of the dies A are for most part of their depth
parallel but the lower part of the one and the upper part of the other slope gently

page_text: back parallel so that the bar to be acted upon can be freely entered as at L Fig. 1
and when rolled comes out from between the dies at M.
Steel or iron bars may be rolled hot, with little or no lengthening effect upon them.
The bars should be about one fifth part larger in diameter than the distance between
parallel faces of the dies A.
The ridges B being on both dies A equally inclined to the line (Fig. 2) are
when face to face at opposite inclinations as indicated by the line y.
دو
C being part of the bed, and D part of the follower of an ordinary". press;
brackets E attached to these have the dies A secured to them and the follower D
moves its die down to about the position marked 1 in Fig. 1.
Any suitable means which form no part of this invention may be employed to
move the upper die.
The dies A may be made without either or both of the margins F, G.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
For manufacture of twist augers and such like articles the use of a pair of dies
each having diagonal parallel ridges arranged face to face so as to roll between
them a round bar and impress it with a helical twist substantially as described.
Dated this 29th day of February 1000.
ABEL & IMRAY,
Agents for the Applicants.
ABEL & IMRAY,
Agents for the Applicants.