Improvements in Box Nailing Machines.
Year: 1894

page_text: Date of Application, 7th July, 1894-Accepted, 8th Dec., 1894
COMPLETE SPECIFICATION.
Improvements in Box Nailing Machines.
I, WILLIAM SPENCER DOIG, of 24 Franklin Street, Brooklyn, County, of
Kings and State of New York, United States of America, Engineer, do hereby
declare the nature of my invention for Improvements in Box Nailing Machines,
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 more particularly to a nail clinching attachment for a
box nailing machine, and it consists in the construction and novel arrangement
of parts as hereinafter specified and particularly pointed out in the appended
claims.
In the accompanying drawing
Figure 1. is a partial elevation and partial vertical section of a box nailing
machine, embodying my improvement.
Figure 2. is a side elevation on an enlarged scale more particularly showing the
clinching mechanism.
"
Figures 3. and 4. are sectional views showing the two positions of the cams for
raising and lowering the clinching anvil.
Figure 5. is a front elevation of the anvil and its operating mechanism.
Figure 6. is a partial plan and partial section thereof, and Figures 7 and 8.
are sectional details showing the position of the anvil before and after clinching
the nails.
Referring by letter to the drawing A. designates the frame of the box nailing
machine, A', the nail pan, A³, the driving mechanism, A³, the nail punches carried
by the vertically reciprocating crosshead A. A' indicates the nail chutes, and
A* the table.
The parts above enumerated are all clearly shown and fully described in
English Patent No. 6,657 of May 18th, 1886 and granted to Herbert John Allison,
and therefore need no further description here either as
operation.
to construction or
I will now describe the mechanism embodied in my present improvement.
B. designates a bed plate, preferably of cast iron, designed to rest upon the
table A, and support the clinching anvil and certain of its appurtenances. B', is
the riveting anvil, consisting preferably of a bar of steel or other hardened metal,
extending across the bed plate B.
B2, B3, indicate the side portions of a box material supporting frame surrounding
the riveting anvil B' and supported on the base B.
There is a relative vertical movement between the frame portions B³, B, and
the clinching anvils B¹, so that the ends of the driven nails may be brought in
contact with the anvil whereby the nails will be clinched upon a continued.
movement of the nails. In this instance the anvil is shown as stationary and the
parts B B', movable relatively thereto. The mechanism for causing this relative
movement consists of rocking cam shafts 6 having journal bearings in boxes b' on
the ends of the bed plate B.
a
These cam shafts are shown as having a rounded side and a flat side 6* and at
their inner ends the shafts are provided with pinions 6, engaging with
horizontally movable rack bar B', supported in a rabbet or upon a flange of the
bed plate B. and guided by means of pins 6, extended from the bed plate through
longitudinal slots in the rack bar.
A reciprocating horizontal movement is imparted to the rack bar by means of a

page_text: lever C, pivoted between its ends to a bracket c secured to a fixed portion of the
box nailing machine. The inner end of the lever C. engages with the rack bar
and the outer end engages with a cam plate C', secured to and moved vertically
by the cross-head A'.
This cam plate C₁ has perpendicular walls c' in its main portion and laterally
inclined walls c² at the upper end of the perpendicular walls. The lever C. is
shown as having a rotary spherical head which engages between these walls and
allows for a certain universal movement with a minimum of friction.
The cam plate C¹, is shown as secured to the cross-head At by means of bolts of
passing through longitudinal slots c³ in the cam plate so that said cam plate may
be adjusted vertically to cause a slow or quick movement upon the parts which it
operates.
During the vertical movement of the cross-head A' and while the walls c¹
of the cam plate are
in engagement with the lever C. there will be no
movement of the lever and consequently no movement of the parts B³, B³,
but when the walls engage with the lever C. the rack bar will be moved
horizontally thus rotating the pinions to rock the cam shafts b, either to
raise or lower the parts B³, B', according to the direction of movement of the
cross-bead.
The operation is as follows:
A batton end of box X. being placed upon the supports B2, B3, the machine is
set in operation in the usual manner to drop the nails through the chutes A and
to force them into the box material by the punches A³ carried by the cross-head A';
when the nails shall have been forced through the box material a continued
downward movement of the cross-head will cause the cam plate C¹ to operate and
lower the parts B', B³, with the box, so that the ends of the nails will contact with
the anvil B' and clinch or turn them up as indicated in Fig. 8.
It will be understood that when the clinching device is iu use the table A' will
remain stationary.
The nail is driven through the material and projects the distance required to
form the clinch before being operated on by the anvil. This insures a perfect
clinch as the nail is protected by the material from bending or clinching at any
other place than at the point of contact with the auvil.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is,
1. The combination with a box nailing machine of a clinching device supported
on the table thereof and comprising a box material support, an anvil and mechanism
for causing a relative vertical movement between said support and anvil, sub-
stantially as specified.
2. The combination with a box nailing machine of a clinching device supported
on the table thereof and comprising a box material support, an anvil and mechanism
operated from the cross-head of the machine for causing a relative vertical
movement between the support and anvil, substantially as specified.
3. The combination with a box nailing machine, of a clinching device supported
on the table thereof and comprising a fixed anvil, a vertically movable box material
support and mechanism operated from the cross-head of the machine for causing
the vertical movements of said supports, substantially as specified.
4. The combination with a box nailing machine, of a clinching device supported
on the table thereof comprising an anvil bar and a box material support, cam
shafts for causing a relative movement between said bar and support, a rack bar
engaging with pinions on said shafts, a fulcrummed lever engaging at one end with
said rack bar and a cam plate carried by the cross-head of the machine and
engaging with the other end of said lever, substantially as specified.
5. The combination with a box nailing machine of the clinching anvil, the box
material support, the cam shafts, the pinions thereon, the reciprocating rack bar,

page_text: the oscillating lever and the vertically adjustable cam plate carried by the cross-
head of the machine, substantially as specified.
6. The combination with a box nailing machine comprising nail punches of an
anvil, a box material support and mechanism for causing a relative vertical
movement between the support and anvil after a nail shall have been forced into
position and projected through the box material by a punch, substantially as
specified.
Dated thie 90th day of June 1894.
WILLIAM SPENCER DOIG.