IMPROVEMENTS IN "RIVETING MACHINES
Year: 1885

page_text: I THOMAS MORTON residing at 65 Elizabeth Street, in the City, County and
State of New York, in the United States of America, gentleman, do hereby declare
the nature of my invention for IMPROVEMENTS IN "RIVETING MACHINES" and in
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement :-
My invention relates to an improvement in riveting machines and it consists in
the peculiar construction and combination of devices, that will be more fully set
forth hereinafter.
In the accompanying drawings Fig. 1 is a side elevation of a machine embodying
my invention
Fig. 2 is a front elevation of the same.
A represents a frame or standard, which extends vertically, is provided at its
lower end with a horizontal arm or base B at its upper end with a horizontal
arm C and at a suitable distance above the base with an arm D. The arms B, C
and D are on the same side and in a vertical line. On the arm B, on its upper
side, is located an anvil E, which is adapted to be removed from the arm and
replaced by another, and in the upper side of this anvil, in the center thereof, is
made a countersink, e, which corresponds to the size and shape of the rivets that
are to be used in the work to be riveted by the machine. F represents a hammer-
shaft that slides vertically in the arms C and D. To this shaft at a suitable
distance from its upper end, is fixed a horizontal disk G, having ratchet teeth, g,
on its upper face and from this disk surrounding the hammer-shaft, projects the
vertical sleeve f. A coiled spring H is placed around the upper portion of the
shaft F and bears between the underside of the arm C and the upper side of the
sleeve, f. The function of the spring is to keep the hammer shaft normally forced
down upon the anvil.
In the lower end of the hammer-shaft is socketed a hammer head I, in the
hammer face of which centrally therein, is made a conical countersink, i, that is on
a vertical line with the countersink, e.
K represents a pawl that is secured to the standard A near the upper end
thereof, and when the hammer-shaft is raised, engages with one of the ratchet-
teeth thereof. At a suitable distance below the pawl K is a pivoted arm L which.
is connected to the pawl by a spring M, N represents the end of a rotating shaft
that is actuated by any suitable machinery (not shown), and that extends between

page_text: the standard and the hammer shaft at a suitable height. This shaft has tappet-
pins n,
which as the shaft revolves, strike against the under side of the disk G and
raise the hammer-shaft against the tension of the spring H.
As the tappet-pins pass beyond the disk the spring causes the hammer-shaft to
descend with force upon the end of the rivet shank. While the hammer-shaft is
being raised and before it reaches the upward limit of its motion, the pawl engages
with one of the teeth of the ratchet-disk and as the hammer-shaft continues to
rise causes the shaft to partially rotate. By thus partially rotating the shaft at
each blow I adapt the machine to form symmetrical conical-shaped heads to the
rivet shanks. One of these rivets I show at, x, before the conical head is formed
thereon and at, z, when it is finished. The pivoted arm L prevents the pawl from
swinging in toward the standard far enough to clear the ratchet-disk.
By raising or lowering the free end of the arm L, the pawl is caused to engage
with the ratchet-disk at a higher or lower point in the elevation of the hammer
shaft, and thus cause the shaft to be rotated to a greater or less extent before
delivering each blow as will be very readily understood.
A riveting-machine thus constructed is cheap and simple, is positive and direct
in operation, and is adapted to produce finished work. By removing the anvil
and hammer-head and substituting for them others having countersinks of a
different shape, differently-formed heads may be formed on the rivet-shanks.
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 combination of the reciprocating hammer-shaft having ratchet-teeth, the
pawl for engaging with the ratchet teeth as the hammer shaft moves, and the
pivoted arm connected to the pawl for limiting the action of the pawl for
the purpose set forth substantially as described.
2. The combination of the standard A, the anvil secured thereto, the vertically-
reciprocating hammer-shaft having ratchet teeth the pawl pivoted to the standard
and engaging with the ratchet-teeth the pivoted arm and the spring connecting
said arm to the pawl substantially as described.