Improvements in the Manufacture of Rivets and Rivet-setting Machines.
Year: 1893

page_text: Date of Application, 13th Nov., 1893
Complete Specification Left, 13th Aug., 1894-Accepted, 13th Oct., 1894
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Rivets and Rivet-setting
Machines.
I, BARTOLO LEOPOLD D'AUBIGNE, of No. 1, Worship Street, in the County
of London, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
:-
My invention relates partly to what are known as split, preng or bifurcated or
tubular rivets and comprises novel modes of manufacturing the same; and partly
to machines for setting split, prong or bifurcated rivets.
A rivet manufactured according to my invention may be either cast or be
stamped up. When the rivet is cast it is annealed to render it malleable and then
swaged or blocked in order to set the parts in their proper relative positions and to
obtain whatever shaped head may be required, and such a rivet may, if desired, be
provided with two or three prongs the outer surfaces of which may be either flat
or curved. When my rivet is stamped out of a sheet-metal blank the latter (which
is thicker at the middle portion and gradually decreases in thickness toward the
ends) has a round central portion to form the head and laterally extending side
portions to form the shank, and, in order to form the slit, slots are cut in the ends
of such laterally extending side portions either at the centre or at the sides; the
slot in the former case being at right angles to the slit between the edges of the
blank when folded up, and in the latter case in line with the said slit. Instead of
providing the rivet with a slot, the blank may be shaped so that the ends of the
prongs will only be slightly bevelled. Instead of stamping my rivet out of a sheet
of metal I may form it out of solid wire by upsetting one end and then drawing this
upset end through dies to make it tubular, the unupset portion being subsequently
formed into a head, in such a manner that the tube in the shank extends into the
head for the purpose of receiving the pellet of material cut out when inserting the
rivet. The tubular shank may be split or not as desired.
In some cases the prongs of my rivet are broadened or flattened at the ends, such
flattened parts lying upon or entering the fabric or other material when the rivet
is applied.
My improvements in rivet-setting machines comprise a novel arrangement of
holder for supporting the rivets above the material to which they are to be applied
and releasing the said rivets when acted upon by the punch. My improved holder
consists of a bifurcated arm pivotted to an extension formed upon or attached to
the socket in which the plunger or punch slides, the said bifurcated arm being
adapted to support the rivet beneath the head, and then, under the pressure of the
plunger or punch upon the rivet, to yield so as to allow the rivet to enter the
material beneath it. As the plunger or punch is withdrawn a spring acts upon
the bifurcated arm to return it to its normal position.
The anvil upon which the rivet is fixed is advantageously in the form of what is
known as a loop anvil. According to my invention the loop is advantageously
made of a suitable length to permit of broad work being rivetted, and is
advantageously made in three pieces, namely, a lower piece adapted to be fixed to
the framing, an upper piece carrying the anvil proper, and a distance-piece between
the said two pieces, the thickness of the said distance piece corresponding to the
desired space to be formed in the loop.
Dated this 13th dor of Narambor 1902

page_text: Improvements in the Manufacture of Rivets and Rivet-setting
Machines.
I, BARTOLO LEOPOLD D'AUBIGNE, of No. 1, Worship Street, in the County
of London, Manufacturer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
My invention relates partly to what are known as split, prong or bifurcated or
tubular rivets and comprises novel modes of manufacturing the same; and partly
to machines for setting split, prong or bifurcated rivets.
A rivet manufactured according to my invention may be either cast or stamped
up. When the rivet is cast it is annealed to render it malleable and then swaged
or blocked in order to set the parts in their proper relative positions and to obtain
whatever shaped head may be required, and such a rivet may, if desired, be
provided with two or three prongs the outer surfaces of which may be either flat
or curved. When my rivet is stamped out of a sheet-metal blank the latter (which
is thicker at the middle portion and gradually decreases in thickness toward the
ends) has a round central portion to form the head and laterally extending side
portions to form the shank, and, in order to form the slit, slots are cut in the ends
of such laterally extending side portions either at the centre or at the sides; the
slot in the former case being at right angles to the slit between the edges of the
blank when folded up, and in the latter case in line with the said slit. Instead of
providing the rivet with a slit, the blank may be shaped so that the ends of the
prongs will only be slightly bevelled. Instead of stamping my rivet out of a sheet
of metal, I may form it out of solid wire by upsetting one end and then drawing this
upset end through dies to make it tubular, the unupset portion being subsequently
formed into a head, in such a manner that the tube in the shank extends into the
head for the purpose of receiving the pellet of material cut out when inserting
the rivet. The tubular shank may be split or formed with prongs or not, as
desired.
In some cases the prongs of my rivet are broadened or flattened at the ends, such
flattened parts lying upon or entering the fabric or other material when the rivet
is applied.
My improvements in rivet-setting machines comprise a novel arrangement of
holder for supporting the rivets above the material to which they are to be applied
and releasing the said rivets when acted upon by the punch. My improved holder
consists of a bifurcated arm pivotted to an extension formed upon or attached to
the socket in which the plunger or punch slides, the said bifurcated arm being
adapted to support the rivet beneath the head, and then, under the pressure of the
plunger or punch upon the rivet, to yield so as to allow the rivet to enter the
material beneath it. As the plunger or punch is withdrawn a spring acts upon
the bifurcated arm to return it to its normal position.
. To enable my invention to be fully understood I will describe how it can be
carried into practice by reference to the accompanying drawings, in which :-
Figures 1 to 18 are views illustrating various modes of manufacturing rivets
according to my invention; and,
Figures 19 to 23 are views illustrating my improvements in rivet-setting
machines:
Figures 1 and 2 represent respectively an elevation and an underside view of a
prong or bifurcated rivet made by casting according to my invention, a representing
the head, and b, 6 the prongs of the rivet. The rivet having been cast is annealed
to render it malleable and then swaged or blocked in order to set the parts in their.
proper relative positions as shewn and to obtain the required shape of the head b.

page_text: It will be obvious that instead of two prongs as shewn I may cast each rivet with
three prongs and instead of the outer surfaces of the prongs being curved as shewn
they may be flat.
'
Figures 3 and 4 are an elevation and an underside view of one form of my rivet,
and Figures 5 and 6 are similar views of slightly modified form when stamped
out of a sheet-metal blank such as is shewn in plan and edge view in Figures 7
and 8 respectively. c is the round central portion, and d, d the laterally extending
side portions of the blank designed to form the head and shank of the rivet
respectively. As shewn in Figure 8 the central portion c decreases in thickness
towards the ends of the lateral portions. e, e are the slots cut in the ends of the
lateral portions d, d, as shewn in Figure 9, or at the sides of the same as in
Figure 10 and serving to form the slit or opening between the prongs as shewn
respectively in Figures 3 and 4 and in Figures 5 and 6, the said opening in the
former instance being at right angles to the slit f between the edges of the blank
when folded up and in the latter instance in line with the said slit.
In Figures 11 and 12 which are elevations at right angles of another form of
rivet, g, g indicate the bevels at the ends of the prongs which I sometimes form
instead of providing the rivet with a slot or opening as hereinbefore described.
Figure 13 is an elevation of a rivet when formed out of wire according to my
invention. Figure 14 represents the piece of wire one end of which is upset so as
to produce flattened portions h, h, Figure 15, the said portions being then drawn
through dies so as to form the tubular shank of the rivet as in Figure 16. The
portion, Figure 16, is then formed into a head in such a manner that the tube in
the shank extends into the said head as indicated at j, Figure 13, for the purpose of
The tubular
receiving the pellet of material cut out when inserting the rivet.
shank in this case may be formed with prongs or not as desired.
k, Figure 17, indicates the broadened or flattened end with which I sometimes
form each of the prongs of my rivets, such flattened parts lying upon (or
entering) the fabric or other material when the rivet is applied as shewn in
Figure 18.
I will now describe my improvements in rivet-setting machines.
Figure 19 is a front elevation of a portion of a rivet-setting machine shewing
my improvements applied thereto; and,
Figures 20 and 21 are respectively horizontal sections on the lines 20-20
and 21-21, Figure 19:
Figure 22 is a vertical section on the line 22-22, Figure 19, and including
another part of the rivet-setting machine not shewn in Figure 19.
Figure 23 is a similar view to Figure 22 illustrating the action of the parts.
7 is the bifurcated arm for supporting the rivet to be applied, and m is the
extension on the socket n, in which socket the plunger or punch o for fixing the
rivet slides. The bifurcated arm is pivotted (as clearly indicated at P, Figures 22
and 23) in the recess p¹ in the lower part m¹ of the extension m. 7 is the spring
which through the medium of a pin q¹ maintains the arm / in its normal position
and returns it to the same after being acted upon by the plunger o. By this
construction if a rivet be placed in the arm I so as to be supported by its head, as
shewn in Figure 22, and the piece of material to which it is to be applied is
placed upon the anvil & beneath then by moving down the plunger o and socket n
in the usual manner the rivet will be forced down by the plunger into the
material, the head of the rivet causing the arm to yield and turn on its pivot p
so as to be free of the rivet as indicated in Figure 23. The arm when the
plunger o is withdrawn is returned to its normal position by the action of the
spring q.
8
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is :-
--
1. The manufacture of cast and stamped up rivets substantially as hereinbefore

page_text: described and illustrated by Figures 1 and 2 and in Figures 3 to 12 of the
accompanying drawings.
2. Forming a rivet from a piece of wire in the manner substantially as described
with reference to Figures 13 to 16 of the accompanying drawings.
3. Forming the prongs of rivets with broadened or flattened ends as herein-
before described and illustrated in Figures 17 and 18 of the accompanying
drawings.
4. The improved rivet holder for rivet-setting machines comprising a spring
bifurcated rivet supporting arm pivotted in an extension of the socket through
which the rivet-setting plunger or punch slides substantially as hereinbefore
described and operating as set forth.
5. The combination of parts forming the improved rivet-setting machine
herein before described and illustrated in Figures 19 to 23 of the accompanying
drawings.
Dated thin 19th 1 of 1001
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.