Year: 1891

page_text: Date of Application, 13th Oct., 1891-Accepted, 14th Nov., 1891

page_text: piece A, and a top piece A³. The upright A, is mounted on a bed plate A',
and carries a bracket a', in which is a bearing a, for the main driving shaft B.
A pulley B, is loosely mounted on the driving shaft, and is connected to rotate
therewith, by a clutch C. The clutch is connected with a treadle e, by an arm r,
carrying a pin or roller e³, engaging a groove c', in the clutch, an arm of secured to
or forming part of the arm c, and a link c³, which is pivoted to the arm c', and to
the treadle. The arms c and c' are pivotally supported on the bracket.a'.
An arm d, on the shaft B, is adapted to engage with a roller e', on an arm d', of
the arm c. The purpose of this arrangement is to permit the clutch to be auto-
matically disengaged from the driving shaft. The shaft B, extends through a
bracket B, and carries on its outer end a pinion B', which gears with a toothed
wheel B, provided with a crank arm 6. To this arm is secured a cord or wire T',
passing over pulleys ³, and connected to the nail-carrying pans. As the
crank b', is revolved, the pans are raised and lowered for a purpose hereinafter
described.
A table D, on which the box is to be placed, while being nailed, is connected
with the frame, and adapted to slide vertically thereon. It is provided with a
downwardly extending rod D', screw-threaded at its lower end, and entering a
bracket D. At its upper end, the rod D¹ is connected with a sprocket wheel G',
which is connected with a sprocket wheel Go, on the bottom of the table, by means
of a chain G. A hand wheel G is secured to the shaft G, of the sprocket
wheel G, and by turning this wheel the screw may be rotated so as to adjust the
table D, vertically. An inclined supplemental table D³, is supported on the table D,
and rigidly secured thereto. A screw shaft G, extending through a bracket G¹
on the under side of the inclined table, is provided with a hand wheel G', by
which it may be turned. The screw shaft extends through the downwardly
extending screw-threaded end G, of a slide G³. By operating the hand wheel,
the slide G', may be adjusted from one end of the table to the other, which is
provided with a slot a, to admit of this adjustment.
On the inner end of the shaft B, is a crank wheel B³, the crank pin b, of which
is connected with a pitman F¹, pivotally connected at its lower end to the vertically
reciprocating cross head F. As shown in Fig. 25, yielding blocks of rubber
are interposed in the connections of the pitman F', to relieve the strain and shock
when the cross head is reciprocated. The cross head F, carries a series of drivers I.
Each of these drivers is provided with a flanged head piece I', as shown in Fig. 23,
adapted to enter a groove in the front of the cross head F. A plate I', is secured
to the front of the cross head and holds the heads of the drivers in position ; but
in order that any or all of the drivers may be removed, the plate is formed with
vertical slots I, through which extend the set screws I. By loosening the screws,
the plate may be raised so that its lower end rises above the heads of the drivers
and they may be readily removed. When the plate is lowered and the screws
tightened, the drivers are firmly held in the cross head, and may be reciprocated
vertically therewith.
Nail boxes H, one for each driver, are secured to a cross beam H', attached to
the main frame, and these boxes are arranged to receive the nails and to permit
the drivers to reciprocate through them. As shown in Figs. 21 and 22, each nail
box is formed with two channels H' and H', through which the nails and drivers
may pass. Jaws H' and H, are pivoted at Hand H, respectively, and springs H*
and H', tend to force the lower ends of the jaws together, but permit of their being
separated and moved about their pivots when the nail is driven by the driver. The
jaw H' has a slight movement independent of its pivotal connection, by means of
an open bearing, as shown at H, so that the jaw may yield, should the nails
clog in the box. An arm I*, is secured to the cross beam H', and extends
downwardly therefrom to form an abutment or guide for holding the box in position
on the table.
The nails are conveyed to the nail boxes by means of tubes J, which are
preferably flexible. These tubes receive the nails from nail delivery mechanism, and

page_text: they are connected to and supported by the frame in cross pieces K, K¹. The cross
pieces K, K, are provided with recesses through which the tubes pass, and the front
ends of these recesses are closed by caps j, secured by means of set screws j¹. When
the screws are tight, the tubes are firmly held in position; but by loosening the screws,
and allowing the caps to drop, the tubes may be individually removed from their
supports.
A top piece A³, of the frame, is extended beyond the side or end piece A', and
is provided at each end with a bracket L, and with a third bracket L', over the
end piece A'. A series of brackets or plates L', L, L, are secured to the
brackets Land L, and form bearings for mechanism presently to be described.
In the right hand end of the machine in the brackets L. and L³, is mounted
a shaft M. This shaft carries cams N, N', and N. The cams N and N', are
secured to a sleeve M³, by means of set screws X and X'. The sleeve M², is
provided with a ratchet M, with which engages a pawl M', carried by a lever N'.
The sleeve M³, may be secured to the shaft M, by a set screw Y. Normally the
cams N and N¹, move with the shaft, but in order that the cams may be adjusted
relatively to the shaft, the set screw Y, may be loosened; and by operating the
lever N, which carries the pawl M', the cams may be moved about the shaft M,
so as to vary their relation to the mechanism which they operate or throw them
out of operative connection therewith.
The cam N³, is secured to the shaft M, inside the bracket L. On this cam is
an arm 0³, connected by a pivot pin O¹, to a pitman O, connected to the vertically
reciprocating cross head F, by a pivotal connection O'. As the cross.head is
reciprocated, a vibrating motion is imparted to the cam N³, and its shaft M, and
consequently a like motion is imparted to the cams N and N¹. A cam shaft M', is
mounted in the brackets L', L, and carries cams N', N', the cam N* being on the
end of the shaft M', inside the bracket L. Mechanism N° for adjusting the
cam N, relatively to its shaft M', substantially like that described in connection
with the shaft M, may be provided.
Horizontal rods P, P1, P2, extend through the brackets L, L³, L³, and are free
to slide therein. The rods P' and P are adapted to engage with the cams N'
and N, respectively. Springs Q, Q. normally hold the rods in engagement with
the cams. The rod P, is provided with a roller Q, which engages the cam N°.
The rod P is normally held to cause the engagement of the roller Q', with the
cam N, by a spring Q. Rods P and P, are adapted to slide horizontally in the
brackets L. The rod P, is normally held by a spring Q3, in engagement with
the cam N2. The rod P³, carries a roller Q, which engages with the cam N*, and
is normally held in engagement with this cam by a spring Q
As the cross head F, reciprocates vertically, an oscillating or vibrating movement
is given to the cam shaft M, and the cams thereon, and through the rod Oʻ, a
similar movement is given to the cam shaft M, and its cams.
Before describing the mechanism which the rods P, P, P, P' and P^ operate, I
will describe the mechanism which holds the nails and carries them to the tubes J.
Two nail conveyors S and S', are provided in this machine, the one above the
other. The conveyor S, is supported at its front end in suitable bearings on the
frame, and also by vertical rods R, hinged to the top of the main frame, and having
slots St at their upper ends. Through these slots extend pivot screws S³, attached
to the conveyor, which may be adjusted vertically in the slots to vary the inclination
of the conveyor S. Rods R', in like manner are provided with slots S', and with
adjustable bearing screws St.
The construction of one of these conveyors is shown in detail in Fig. 11 to 15
inclusive. Within the outside frame S, is an inside frame So, and to these frames
are secured metallic plates S7, S³, S' and S. The plates S', are secured to the
frame S, and the plates S, to the frame S. Adjusting screws S", extending
through the frame S, and bearing against the frame S, admit of the adjustment of
these frames relatively to each other, so as to vary the space or channel S",
between the plates S' and S³,
=

page_text: As a further means of adjusting the plates, I may provide cleats or bars S",
secured to the plates S, and adjustably secured to the frames S6, by screws S
By this means, the plates may be adjusted without moving the frame S, relatively
to the frame S. The delivery ends of the channels S1, may be opened and closed
by fingers T, pivoted to the front of the frame S, as shown in Fig. 12. When the
end of the finger enters the channel S, as shown in Fig. 12, it is closed and the
passage of nails is obstructed, but when turned aside, as shown in Fig. 11, the nails
may pass freely through the channels.
On the under side of the plates S', S, S' and S10, are secured guide flanges T
and T, which serve to keep the nails in order as they are delivered from the
channels. These flanges diverge or flare at their inner ends. At their rear ends,
the frames S, are provided with brackets having open bearings T', in which the
bearing studs T, of the pans E, rest.
It will thus be seen that the nail conveyors form the supports for the front ends
of the pans, and that when the conveyors are adjusted vertically, the pans are
correspondingly adjusted. It will also be seen that as the bearings are open, the
pans may readily be removed, and that they have a slight vertical play independent
of the conveyors. A series of nail pans E, are provided at their front ends with
bearing studs T, adapted to rest in the open bearings T', of the nail conveyors.
At their rear ends, the pans are formed with hooks T', which extend over a rod T',
connected with the cord or wire T', which in turn is connected with the crank b¹, as
before mentioned.
When this crank is revolved, the pans are raised and lowered at their rear ends
about their pivotal connection with the conveyors S and S', so that the nails are
shaken up and delivered to the conveyors.
Each of these pans is preferably constructed as follows: The rear end of a pan
is provided with an inwardly inclined back piece, and at the front with a horizontally
sliding plate u, slotted at u, and through these slots extend adjusting screws u³.
A plate u', is secured to the plate u', and extends horizontally beneath the pan.
At its inner end, the plate a', is connected with a cross piece u. Another plate u,
parallel with the plate u', is connected with the pan in a fixed relation thereto, and
is supported at its rear end by a cross piece u². Above the plates u and u¹, are
bevelled plates u. These act as guides for the nails, the shanks of which extend
through the slot between the bevelled plates u', and the plates " and u².
When the pans E, are lifted, the nails in the slots just mentioned, pass to the
slots or channels S", in the conveyors S and S¹, and pass down these conveyors
into position to be delivered to the tubes J. Each conveyor S, and S¹, is provided
with a series of pans, which deliver the nails thereto, and a set of tubes J, for each
conveyor is provided for carrying the nails to the driver boxes; but as shown in
Fig. 1, the arrangement is such that nails from the upper conveyor are carried to
the same nail box as nails from the lower conveyor, the lower ends of the tubes
being connected to a Y-shaped coupling piece J. By this arrangement, nails of
different sizes or kinds may be delivered to the same nail boxes. The delivering
apparatus for one kind of nails may be closed while the delivering apparatus for
the other kind is in use, by mechanism hereinafter described.
I will now describe the mechanism for delivering the nails individually to the
nail conveying tubes.
To either the bars P', or P³, are secured by screws V* a series of blocks V, to
which are pivoted by pins V2, stops V. Springs V', interposed between laterally
projecting arms of these stops and brackets on the blocks V, normally hold the
stops in a vertical position, to normally close the channel ways S". As the cams N
and N' are oscillated, the bars P' and P2, are reciprocated and move the stops V',
alternately away from and in front of the channels. When the channels are
unobstructed by the fingers T, nails may be delivered from the channels to the
tubes J, when the stops V₁are withdrawn therefrom. Similar stop mechanism is
mounted on the rod P, and operated in a similar way, by the cam N'.
Figs. 18, 19 and 20 are detail view in perspective, showing clearly the

page_text: arrangement by which the stops V' obstruct the channels S", of the nail
conveyors.
In order that nails may be delivered independently to the conveying tubes J, and
without interference, I provide what I call pointers, which separate the nail at the
end of a channel from that directly behind it, when the stop V₁, is removed from
the front of the channel. By this arrangement, when the stop is removed, the
first nail in the series drops into a tube J, but the other nails in the channel are
held back by the pointer. These pointers, for the lower set of nail channels, are
carried by the bar P.
The details of construction are shown in Figs. 16 to 20, inclusive, where a
hanger V³, is shown as pivoted to the bar P, and provided at its lower end with a
rearwardly projecting bifurcated arm Vs, and at its upper end with a laterally
projecting arm V, between which, and the bar P, is interposed a spring V². The
hanger V, is so pivoted to the bar P, that it has a little play so as to rock slightly
about its pivot against the force of the spring V'.
In the bifurcated arm V, is mounted a block V, having a flange V", bearing
against one side of the arm. The block also carries a screw V, with which
engages a screw-threaded lever V10, the inner end of which bears against the
opposite side of the arm V. In this way, the block V, may be held securely in
the arm V, and may be adjusted therein. Projecting laterally from the block V®,
is a pin or pointer V", tapered at its outer end, and adapted to pass between the
first and second nails in a channel S, and separate them.
When the bar P, is reciprocated by the cam N³, the pointers or pins V",
alternately pass between the nails in the channels S, and the machine is so timed
that the pointers thus pass between the nails when the stops V', are removed from
the front of the channels. In this way, nails are delivered independently or
separately to the nail conveying tubes.
Should one of the pointers strike a defective nail, the hanger V, will swing on
its pivot against the force of the spring V', and will give sufficiently to allow the
bar P to reciprocate as usual, and actuate the other pointers in the series while
this one remains inactive until the defective nail or obstruction is removed, when
the spring V', returns this mechanism to its normal position to act with the others.
In like manner, should any one of the stops V', 'meet with an obstruction, the
springs V³, will allow it to yield and remain inactive while the other stops are
operating as usual. Mechanism for separating the nails in the channels, similar to
that just described, is carried on the bar P³, operated by the cam N', and need not
be specifically described.
The apparatus described is compact in construction and efficient in operation.
The driver boxes may each be supplied with nails from two sources by the
tubes J, J, and nails from any set or any series of nail channels in the conveyors
may be readily closed or opened, and the cams for operating the stop mechanism
being adjustable on their shafts, may be readily thrown into or out of action without
stopping the main driving mechanism.
On
Referring to the two last sheets of the accompanying drawings, Figs. 26, 27,
28, 29, 30, 31, 32 and 33. I have shown the several modifications of my
machine supported from a circular column, A'. This column has a threaded
portion carrying a hand wheel G. Above the hand wheel is a platform D*
having a hub surrounding the column and free to slide vertically thereon.
the lower side of this hub is a rim over which clips D, D attached to the
hand wheel engage and serve to carry the platform vertically when the hand
wheel is turned on the threaded column, thus affording adjustment between the
platform and the nailing mechanism. Above the platform a nail box frame H",
shrunk on the column is provided with a horizontally grooved cross head. to
which the nail boxes are attached. The nail boxes are constructed as follows:
A fixed jaw H is made fast to the cross head of the nail box frame. A
movable jaw H", is supported from this fixed jaw by links, H", H", hinged to
the upper end of the fixed jaw and to the lower end of the movable jaw, so that

page_text: from
by the yielding of these hinge joints, the movable jaw may be folded away
the fixed jaw, either at the top for the purpose of inspection and cleaning of
the nail-box as shown in Fig. 29, or at the lower end to permit the passage
of the nail-head when the nail is expelled. Springs H", attached to pins H
and H on the fixed and movable jaws respectively, keep the two jaws normally.
closed together. These jaws, taken together, form the nail box.
channel lies partly in each jaw. It is open at its upper end for the entrance
of the nail driver and at the lower end for the expulsion of the nail, and serves
as a guide for the latter as it enters the wood.
A vertical
This
An additional feature is introduced in the construction of the nail box as
shown in Fig. 31. An adjustable block H is set in the fixed jaw and carries
the unyielding portion of the vertical channel. This block is hinged near its
lower end and retained at the desired inclination by a screw near the other
end. For the insertion of the nail into the nail box an oblique channel
opening into the vertical is provided as shown in Figs. 28 and 31.
channel, however, is not essential to a nail box embodying the features above
described and hereinafter claimed, and I have therefore shown in Fig. 32 a nail
box having the construction that I shall claim, but in which the oblique channel
is omitted and in which the nail can be inserted only by entirely withdrawing
the driver.
Above the nail box frame is the driver carrying frame, F³, with its driver
carrying cross head, to which the drivers I, 17, are clamped. This frame can
slide on the column, and is reciprocated thereon. This reciprocation is effected
mechanically through the connecting rod or pitman F¹, one end of which is
attached to a bar in the driving carrying frame which passes through the slots
in the column, and the other end of the connecting rod is carried by the crank-
pin, which is revolved from the shaft B'. When the driver carrying frame is
in its highest position the end of the driver lies in the vertical channel above
the point where the oblique channel enters, so that a nail dropped in the oblique,
will reach the vertical channel, and come under the driver. The driver is
shown in this position in Fig. 28. When the form of nail box illustrated in
Fig. 32 is used, the driver is entirely withdrawn when the driver carrying
frame is in its highest position. When the driver carrying frame descends
carrying the driver with it, the latter strikes the nail-head and drives the nail.
My nailing machine is designed for two classes of work, for which the
requirements are different, that is, for the nailing of cleats onto boards and for
the nailing together of boxes. In making boxes with cleats these are nailed
to the sides which are to form the box, before these sides are assembled, so in
nailing on cleats the work does not stand as high above the platform as in the
nailing together of boxes. In order to avoid the necessity of adjusting the
platform closer to the nail box when changing from box nailing to cleat nailing,
a cleat nailing block W is placed on the platform. In this latter class of work
since the nails pass through the boards it is desirable to turn and clinch the
points. The natural way to effect this clinching of the nails is to have the
points strike the side of a groove in a piece of metal on coming through
the boards so that the points will be deflected and turned back into the wood.
As it is desirable in rapid work to place the boards over the groove before
the nails are driven, and as variations in the grain of the wood render it
uncertain just where the points of the nails are likely to emerge, either of two
difficulties result; if the edge of the groove is too close to where the points
of the nails are expected to emerge, some will strike the metal outside of the
groove and fail to be clinched; or, if the edge is sufficiently far away to insure
that the points will come out over the groove some will come out so nearly
over the center of the groove that they will not be properly deflected. I have
avoided these difficulties by placing two grooves together so that they join in a
sharp ridge directly under the vertical channel of the nail box. The nail having.
a sharp point will not be arrested by the sharp edge of the ridge, but will

page_text: strike one side or the other and be deflected by the sides of the groove in
which it strikes; these grooves are shown in a bar of steel S, which may
either be let into the cleat nailing block, as shown in Figs. 26 and 30, or, it
may be let into the platform as illustrated in Fig. 33.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :
1. The combination in a box nailing machine of the main frame, a table adjust-
able vertically thereon, a supplemental inclined table secured to the top of the
vertically adjustable table, a slide adjustable along the inclined surface of the
supplemental table, and box nailing mechanism located above both tables and
having drivers reciprocating vertically towards and from them, substantially as
set forth.
2. The combination in a box nailing machine, of the main frame, a table adjust-
able vertically thereon, a supplemental inclined table secured to the vertically
adjustable table, a slide adapted to move in a slot in the inclined surface of the
supplemental table, a screw shaft extending through the screw-threaded end of the
slot, and through a bracket on the inclined table, a hand wheel for operating
the screw-shaft, a box-nailing mechanism located above both tables and having
drivers reciprocating vertically towards and from them, substantially as set forth.
3. In a box nailing machine, the combination of a series of drivers having flanged
heads, a grooved cross head in which the driver heads are adapted to fit, a plate for
holding the driver heads in position on the cross head, and adjusting screws
extending through vertical slots in this plate, whereby the plate may be lifted
vertically and permit the removal of any one or all of the drivers, substantially as
set forth.
4. In a box nailing machine, the combination in a nail box, of the pivoted jaws,
springs for holding them together, and an open bearing for one of the jaws to
prevent the clogging of nails in the box, substantially as set forth.
5. In a box nailing machine, a nail conveyor consisting of the combination of an
outer frame, an inner frame, cleats adjustably secured to the inner frame plates
secured to the cleats on the inner and outer frames, and devices for adjusting the
inner frame relatively to the outer frame, substantially as set forth.
6. In a box nailing machine, a nail conveyor having a nail channel, a vibrating
stop V¹ adapted to alternately open and close the channel, and a stop finger T
connected with the frame of the conveyor, and adapted to be moved into or out of
said channel, substantially as set forth.
7. The combination of a frame, a series of nail channels therein, a series of
vibrating stops for alternately opening and closing all the channels in the series,
and a series of pivoted stop fingers secured to the frame and adapted to open and
close said channels, individually, substantially as set forth.
8. The combination of a frame, a series of nail channels therein and flanges below
the channels with their inner ends diverging or flaring, substantially as set forth.
9. The combination of a conveyor frame, a series of nail channels therein,
brackets having open bearings secured to the conveyor frame, and a nail supply pan
having studs supported in these bearings, substantially as set forth.
10. The combination of a frame, a nail channel therein, a nail supply pan
pivotally connected with said frame, supports for the front end of the frame,
adjustable supporting rods for the rear ends of the frames, and flexible supports for
the rear ends of the nail supply pans, the organization being such that the frames
having the nail channels, and the nail supply pans are adjusted vertically and simul-
taneously by the adjusting rods, substantially as set forth.
11. In a box nailing machine, the combination of the nail supply pans, the hooks
on the rear ends thereof, the rod extending through said hooks, the main driving
shaft of the machine, and a flexible connection between the rod and the driving
shaft, substantially as set forth.

page_text: 12. In a box nailing machine, the combination of two frames arranged one above
the other, nail channels therein, means for independently raising and lowering said
frames, means for opening and closing said channels, nail supply pans for the nail
channels in the two frames, and means for actuating the nail supply pan substan-
tially as set forth.
13. In a box nailing machine, the combination of two frames arranged one above
the other, nail channels in these frames, means for independently raising and
lowering said frames, nail supply pans for the channels in the two frames, the main
driving shaft, flexible connections between the driving shaft and the nail supply
pans, mechanism for automatically and independently opening and closing the nail
channels, nail boxes, driver mechanism, and conveyors for carrying nails from the
nail channels to the nail boxes, substantially as set forth.
14. In a nail supply pan, the combination of a fixed plate, an adjustable front
plate, and a plate parallel with the fixed plate, secured to the front plate and
adjustable therewith, substantially as set forth.
15. In a nail supply pan, the combination of a fixed plate, an adjustable front
plate, a plate parallel with the fixed plate secured to the front plate and adjustable
therewith, and the bars u², u, on which the inner ends of the plates rest, substan-
tially as set forth.
16. In a box nailing machine, the combination with a nail box of two or more
nail conveying pipes or tubes leading from separate nail channels to the nail box
to carry nails of different sizes thereto, and means for feeding nails to the tubes,
substantially as set forth.
17. The combination of a series of nail channels, stops for opening and closing
the front ends of these channels, a rod to which these stops are connected, a cam
for operating the rod, and means for adjusting the cam to throw it into and out of
operative connection with the rod, substantially as set forth.
18. In a box nailing machine, the combination of the vertically reciprocating
cross head and drivers, a series of nail channels, stops for opening and closing these
channels, a rod to which the stops are connected, a cam for actuating this rod,
connections between the cam and the vertically reciprocating cross head, and means
for adjusting the cam relatively to the rod to throw it into or out of operative
connection therewith, substantially as set forth.
19. The combination of two separate sets of nail channels, two separate sets of
stops for opening and closing these channels, rods to which these stops are connected,
cams for operating these rods, means for operating the cam to actuate the stops for
one set of channels, and connections between this cam and the cam which actuates
the stops for the other set of channels, substantially as set forth.
20. The combination of a nail channel, a pointer or finger for separating the
nails in the channel, a hanger to which the pointer is secured, means for adjusting
the pointer transversely to its axis in the hanger, and a bar to which the hanger is
secured, substantially as set forth.
21. The combination of a nail channel, a pointer, a hanger or frame in which it
is mounted, a bar to which the frame or hanger is pivotally connected, and a
spring for holding the hanger in its normal position, substantially as set forth.
22. The combination of a series of nail channels, a series of pointers adapted
to separate the nails in the channels, a reciprocating bar to which the pointers
are connected, an arm engaging this bar to actuate it, a series of stops for
opening and closing the nail channels, and a cam for actuating said stops, substan-
tially as set forth.
23. In a box nailing machine, the combination of a series of nail channels, a
series of tubes to which nails from the channels are delivered, cross bars having
recesses for supporting these tubes, and movable caps for holding the tubes in the
recesses, substantially as set forth.
24. In a box nailing machine, the combination with the main driving shaft and
the vertically reciprocating cross head actuated thereby of a connecting rod provided
with an elastic cushion located above its driving pin, substantially as set forth.

page_text: 25. In a box nailing machine, the combination with a circular column, threaded
for a hand-wheel, of a hand wheel encircling this column, so as to turn on its
screw thread, a platform having a hub surrounding and guided by said column and
supported by the hub of said hand wheel, a nail box frame having a cross head
and supported from said column, a nail box attached to said cross head, a driver
carrying frame having a cross head and guided by said column so that it can be
reciprocated thereon, and a driver carried from the cross head of said driver
carrying frame and located above said nail box, substantially as set forth.
26. A nail box for a nailing machine consisting of a fixed and a movable jaw,
grooved on their adjoining faces so as to form a channel for directing the nail, links
hinged to the upper end of said fixed jaw and to the lower end of said movable jaw
and springs attached to both jaws whereby they are drawn together, in com-
bination with a driver for expelling and driving said nail from said channel,
substantially as set forth.
27. A nail box for a nailing machine consisting of a fixed and a movable jaw,
grooved on their adjoining faces so as to form a channel, largest at its upper end
and reducing with a uniform taper, for guiding the nail and springs for drawing
the jaws together, in combination with a driver for expelling and driving said nail
from said channel, and a supporting framework for the work and said fixed jaw,
substantially as set forth.
28. A nail box for a nailing machine consisting of a fixed and a movable jaw,
an adjustable block set in said fixed jaw, and grooved on its face opposite a corre-
sponding groove on the adjoining face of the movable jaw, so as to form a channel
for directing the nail and springs for drawing the jaws together, in combination
with a driver for expelling and driving said nail from said channel, substantially
as set forth.
29. In a box nailing machine a support for work having two grooves at right
angles to which they are adapted, from their curved form and size, to turn and
clinch the points of the nails as shown, and meeting in a ridge, in combination
with a nail box located so as to direct the nails through the boards to be nailed
together and in a line approximately intersecting the ridge formed by said
adjoining grooves, a driver for expelling and driving said nails from said nail box
and a frame carrying said support for work and said nail box, substantially as
set forth.
Dated this 28th day of September 1891.