Year: 1897

page_text: I, HERBERT ASHMAN, of Broadmead, Bristol, Manufacturer, do hereby declare the
nature of this invention to be as follows.-
Rivets known as bifurcated rivets are now common in the trade. They are
generally manufactured from wire which is slotted in such a manner as to produce
prongs with a flat inner face, a rounded outer face, and having a taper from the
base beneath the head to the point or chisel edge.
According to this invention I propose to form a somewhat similar rivet (or
one capable of use in lieu of the rivet made from wire) by casting in malleable
metal the head and taper prongs, such prongs instead of being flat on the inner
face and round on the outer face are formed with an oval cross-section and are
of continuous taper from the base to point. This construction of rivet has the
advantage of having the legs or prongs rise directly from the head without the
additional quantity of plate or metal which is almost universally found in rivets
in which prongs are cut.
A further incidental feature is that there is no
expensive machinery required for manufacture, nor is a large proportion of the
metal lost by being cut out in the slotting process.
I, HERBERT ASHMAN, of Broadmead, Bristol, Manufacturer, do hereby declare the
nature of this invention and in what manner the same is to be performed, to be
ticularly described and ascertained in and by the following statement:-
par-
Rivets known as bifurcated rivets are now common in the trade. They are
generally manufactured from wire which is slotted in such a manner as to produce
prongs with a flat inner face, a rounded outer face, and having a taper from the
base beneath the head to the point or chisel edge.
According to this invention I propose to form a somewhat similar rivet (or
one capable of use in lieu of the rivet made from wire) by casting in malleable
metal (id est metal that is, or that after casting may be made malleable) the
head and taper prongs, such prongs instead of being flat on the inner face and
round on the outer face are to be generally formed with an oval cross-section and
.

page_text: are of continuous taper between the prongs, but prongs of other cross-sections
can of course be equally well made.
-
By means of this construction the small size rivets have the advantage of the
legs or prongs rising directly or almost directly from the head.
A further incidental feature is that there is not such expensive machinery 5
required for manufacture, nor is a large proportion of the metal lost by being
cut out as in the slotting process. Further advantages being that almost any
shape or size of head or prong may be produced as required.
In the accompanying drawings
Fig. 1 represents in side elevation a form of rivet made in accordance with 1
this invention.
Fig. 2 is a like view showing the outside of one of the prongs, and
Fig. 3 is a cross sectional view on the line of Fig. 1.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I 1
claim is
-
1. The improved method of production of bifurcated rivets consisting in cast-
ing same in malleable metal or metal capable of being made malleable,
substantially as described
2. The improved bifurcated rivet made of cast malleable metal or metal capable 2
of being made malleable, substantially as described.
Dated this 20th day of September 1897.