Improvements in Box Nailing Machines.
Year: 1892

page_text: Date of Application, 25th Mar., 1892
Complete Specification Left. 27th Dec., 1892-Accepted, 28th Jan., 1893
PROVISIONAL SPECIFICATION.
Improvements in Box Nailing Machines.
DANIEL MCDOWALL and JAMES BARR both of the firm of John McDowall &
Sons Walkinshaw Foundry, Johnstone, in the County of Renfrew, North Britain,
Engineers, do hereby declare the nature of this invention to be as follows:-
This invention which relates to improvements in box nailing machines is
applicable to both self feeding, vertical, & horizontal nailing machines whether
driven by hand or power & has for its object to provide simple and efficient means
whereby the nails may be automatically driven in consecutive numbers of varying
quantities as well as in equal quantities such as eight & two, four and one & such
like into the wood of the box, when for example, nailing on the bottom of an oblong
box, which may require eight nails at either end, and two at either side, thus
obviating the necessity of resetting the machine for nailing eight nails at a time,
and then two at a time.
In carrying out my invention, I provide the nail delivery shoots, with a hinged
or flap door near their lower ends, and on the back plate, or that part of the shoot
on which the nails slide down, the said doors being hinged or pivotted at their
lower ends, and provided with an eyelet, finger screw, & retaining spring, on their
outsides.
The eyelet is for the purpose of enabling the one end of a connecting rod, being
attached to the door, the other end of said rod is attached to the one end of a lever
or arm keyed, on a rocking shaft, which derives its motion by means of a connecting
rod, cranks and gearing (preferably of two to one) from the pain driving shaft.
The finger screw is for the purpose of setting an auxiliary guiding shoot, which
is mounted on its end inside the main shoot so as to enable the various angles of
the side shoots being altered according to the number of nails being driven.
The whole arrangement is such, that supposing the machine is to nail the
bottoms on boxes, with eight nails in each end, and two in each side, it would
be set to deliver eight nails, for each blow of the hammers, and six of the shoots
would be connected to the rocking shaft, by means of connecting rods, so that
on the machine being started eight nails would be delivered and struck home
by the hammers first blow, and eight nails would again be passed into the shoots,
but those passed into the six which are connected to the rocking shaft, would
pass out through the hinged doors, which have opened in the interval, so as to
perimit of said nails dropping into an auxiliary pan, provided in the machine for
same, and by so doing only leave two nails to be driven home by the hammers,
in the second blow, then the third blow would drive cight nails, and the fourth
two, and so on consecutively.
It will thus be seen that the machine may be set to drive consecutive numbers
of nails at consecutive strokes, or equal numbers at each stroke, according to
the number of shoot doors that are connected to the rocking shaft, there being
no connections when equal numbers are driven at each stroke.
Dated 22nd day of March 1892.
DANIEL MCDOWALL.
JAMES BARR.

page_text: COMPLETE SPECIFICATION.
Improvements in Box Nailing Machines.
DANIEL MCDOWALL and JAMES BARK both of the firm of John McDowall &
Sons, Walkinshaw Foundry, Johnstone, in the County of Renfrew, North Britain,
Engineers, 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 :-
This invention which relates to "Improvements in Box Nailing Machines," is
applicable to both self feeding, vertical and horizontal nailing machines, whether
driven by hand or power, and has for its object to provide simple and efficient
means, whereby the nails may be driven automatically in consecutive numbers
of varying quantities as well as in equal quantities.
In carrying out our invention, we provide the nail delivery shoots with a
hinged or flap door, near their lower ends, and on the back plate or that part
of the shoot on which the nails slide down, the said doors being hinged or
pivoted at their lower ends and provided with an eyelet finger screw and retaining
spring, on their outsides. The eyelet is for the purpose of enabling the one_end
of a connecting rod being attached to the door, the other end of said rod, is
attached to the one end of a lever or arm, keyed on a rocking shaft, which
derives its motion by means of a connecting rod, cranks and gearing, from the
main driving shaft. The finger screw is for the purpose of setting an auxiliary
guiding shoot which is mounted on its end inside the main shoot, so as to enable
the various angles of the side shoots being altered according to the number of
nails being driven.
The whole arrangement is such that supposing the machine is to nail the
bottoms on boxes with eight nails on each end and two on each side it would
be set to deliver eight nails for each blow of the hammer, and six of the shoots
would be connected to the rocking shaft by means of connected rods, so that on
the machine being started eight nails would be delivered and struck home by
the hammer's first blow, and eight nails would again be passed into the shoots,
but those passed into the six, which are connected to the rocking shaft. would
pass out through the hinged doors which have opened in the interval, so as to
permit of said nails dropping into an auxiliary pan provided in the machine for
same and by so doing, only leave two nails to be driven home by the hammers
in the second blow, then the third blow would drive eight nails, the fourth two,
and so on consecutively.
It will thus be seen that the machine may be set to drive consecutive numbers
of nails at consecutive strokes, or equal numbers at each stroke, according to the
number of shoot doors that are connected to the rocking shaft there being no
connections when equal numbers are driven at each stroke.
In order that our invention may be properly understood and readily carried into
effect, we will now proceed to describe the drawings hereunto annexed.
Fig. 1 is a side elevation of a vertical power box nailing machine to which our
invention is applied.
Figs. 2. 3. 4 & 5 are detail views, representing respectively in plan side eleva-
tion, end elevation and plan of underside of the nail delivery shoot & hinged door
made in accordance with & constituting an essential part of our invention.
A, represents a rectangular shaped hopper mounted on the top of the nail shoot
or shoots B, in which the nails required in the nailing operations are placed. The
shoots B, as illustrated in Fig. 1 are or may be set to any desired augle with the
machine, whereby an impetus is given to the nails to slide down themselves by
gravity on to a transverse bar C, provided with grooves or indentations wherein

page_text: the points of the nails as well as the nails themselves are held stationary for the
time being when by one of the motions of the machine the stationary bar is moved.
along horizontally untill the nails are brought immediately over other grooves or
apertures, down which the nails then fall into the delivery shoot D. As seen more
particularly in Figs. from 2 to 5 before mentioned the upper portion of the delivery
shoot D terminates in a flap door E, hinged at F midway or thereabouts along
the length of the shoot. The normal tendency of the flap or hinged door is to
remain closed, due to a semi-elliptic steel spring G & screw & winged nut H.
The said door E at or near the top thereof, is provided with an eyelet I to
allow of its being connected by a pin or its equivalent to the one end of the con-
necting rod J. The other end of the connecting rod J is similarly connected to
a wiper or crank arm K, keyed or otherwise suitably attached to a transverse
rocking shaft L.
The motion imparted to the said rocking shaft L is derived through a con-
necting rod M. engaging crank N keyed on the short shaft O. The said short
shaft is carried in a suitable bearing, supported in the framework of the
machine, and has mounted upon it a spur wheel P which meshes with a spur
pinion Q mounted on the driving shaft R, the relative dimensions of spur wheel P
and pinion Q, are such that the said spur pinion makes two revolutions to one
revolution of the said spur wheel. By the arrangement of spur gearing last
mentioned the hammers which are actuated by the eccentric T from the said
driving shaft R, are caused to operate twice to the single movement of the
connecting rods J & M. It is to be understood that the novel features of the
invention are especially applicable to the nailing of the boxes whose ends and
sides require an unequal number of nails, such for example as 9 & 4 in which
case 4 of the delivery shoots with their flap doors would require to be discon-
nected from the rocking shaft, while five would remain connected to the rocking
shaft L, whose function it is to open and close them alternately. The opening of
the flap door would take place at a pre-determined period prior to the movement
of the transverse bar C, and immediately before the downward movement of the
hammers to press home their four nails. By this operation the five nails (which
would not be required in the nailing of the sides of the box, having the less
number of nails) would fall from the shoot through the doors E. out from the
machine. In view of disconnecting the flap doors for four of the delivery shoots D
as described in the last mentioned arrangement, they or an equal number by an
alternative method may remain connected to the rocking shaft through connecting
rods and wipers. The wipers or crank arms would in this case be mounted on the
rocking shaft at an angle opposite to that shown in K, and assume the position K¹
indicated in dotted lines Fig. 1 of the drawings.
To accommodate the machine to the nailing of various sizes of boxes an adjust-
able screw arrangement operated by hand lever through level gearing is represented
at U, but which forms no part of our present invention.
Having now particularly described and ascertained the nature of our inven-
tion, and in what manner the same is to be performed I declare that what I.
claim is.
First. In a box nailing machine the arrangement of hinged doors which are
attached to the nail delivery shoots, and connected by rods to a rocking shaft,
and operating substantially as and for the purposes shown and described.
Second. In a box nailing machine the arrangement of a spur pinion mounted
upon the driving shaft, and engaging a spur wheel, mounted upon an independent
shaft, together with the arrangement of cranks rocking shaft, and connecting rods
whereby an intermittent motion is obtained and imparted to the said hinged door
of the delivery shoots operating substantially as & for the purpose shown and
described.
Third. In a box nailing machine the arrangement of eccentric mounted upon a
driving shaft, with eccentric rod connecting the hammers to the driving mechanism,

page_text: whereby the hammers operate twice to the single action of the said hinged doors
substantially as and for the purposes shown and described.
Dated this 22nd day of December 1892,
D. DRYSDALE AUSTIN,
45, Hope Street, Glasgow, Applicants' Agent.