Improvements in Boot and Shoe Nailing Machines
Year: 1891

page_text: Date of Application, 15th Sept., 1891-Accepted, 31st Oct., 1891
COMPLETE SPECIFICATION.
Improvements in Boot and Shoe Nailing Machines,
I, HERBERT HOWARD BUFFUM of Abington, in the County of Plymouth and
State of Massachusetts, United States of America, Gentleman, 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 relates to machines for automatically supplying loose nails from
a reservoir or hopper to a nail guiding throat from which the nails are driven by
a reciprocating driver, and it has for its object to provide an efficient and durable
machine capable of rapidly supplying and driving nails.
The invention consists in the several improvements which I will now proceed
to describe and claim.
Of the accompanying drawings, forming a part of this Specification,
Figure 1 represents a front elevation of a machine embodying my invention.
Figure 1 represents a modification hereinafter referred to.
Figure 2 represents an enlarged side elevation of the main portion of the
machine.
Figure 3 represents a section on line 3 3 of Figure 1, on an enlarged scale.
Figure 34 represents a perspective view of the flanged plate
referred to.
Figure 4 represents a top view of the machine.
hereinafter
Figure 5 represents a section on line 5 5, Fig. 1, also on an enlarged scale, looking
toward the left.
Figs. 6 and 7 represent sections on the line 6 6, Fig. 16, the parts being shown
in different positions in said figs.
Fig. 8 represents a partial section on line 8 8, Fig. 2, looking toward the left.
Fig. 9 represents a section on line 99, Fig. 2, looking toward the right.
Fig. 10 represents an elevation of the fixed nail receiver and the part of the
frame to which it is attached.
Fig. 11 represents a section on line 88, Fig. 2, showing the swinging frame in a
different position from that shown in Fig. 8.
Fig. 12 represents a section on line 12, 12, Fig. 2, looking downwardly.
Fig. 13 represents a perspective view of the ejecting device hereinafter
referred to.
Fig. 14 represents a section on line 14, 14, Fig. 2, looking toward the right.
Fig. 15 represents a section on line 15, 15, Fig. 14, looking toward the left.
Fig. 16 represents a section similar to Fig. 3, showing the reciprocating carrier
depressed instead of raised, as in Figure 3, the driver being raised.
Fig. 17 represents a similar section in which both the carrier and driver are
depressed.
Fig. 18 represents a view similar to the lower portion of Fig. 16, but showing
the ejecting devices moved forward.
Fig. 19 represents a view similar to Figure 15, but showing the parts shown in
said figure in different positions.
Fig. 20 represents a view of the automatic stop motion.
Figs. 21 to 30, inclusive, represent detailed views of parts hereinafter mentio¬c².
The same letters of reference indicate the same parts in all the figures.
In the drawings—
a represents the supporting standard or pedestal, on which is mounted the head
or frame a¹ supporting the operating mechanism. b represents a vertically
reciprocating carrier which is fitted to move up and down in fixed guides 6ª 6ª

page_text: which are rigidly attached to the fixed head a' of the machine. c represents a
driver bar which is fitted to reciprocate vertically in a guide formed in the
carrier b. d represents an inclined chute which is supported by an oscillating
frame which is hung upon a horizontal stud d rigidly affixed to an arm a² on the
head a. Said frame d and the nail chute thereon are oscillated by mechanism
presently described, the object of the oscillating movement being first, to present
the lowest nail in the raceway to a fixed nail receiver e formed to receive one
nail at a time, the lowest nail dropping by gravitation into a pocket e in said
receiver; and secondly, to remove the chute from said pocket, leaving the latter
unobstructed so that the nail left therein can be ejected by a reciprocating
ejector f.
The nail receiver e is a vertical plate rigidly attached to the lower bearing b³,
in which the carrier 6 slides, by means of a bolt es passing through an ear e* formed
on the plate e, see Figures 1, 2 and 10.
The nails are supplied to the raceway from a reservoir g, which is provided with
inwardly projecting buckets g', Figures and 14, adapted to receive nails from a
receptacle, Figures 3 and 4, said receptacle being a part of the swinging frame d'
and provided with a circular flange g, Figure 3, which forms a wall to retain the
nails in the buckets until the latter reach such position that the nails are discharged
by gravitation, as indicated in Figure 14. The reservoir g is made in a separate
piece from the flange, and is provided at its center with a stud 9" which is
fitted in a fixed bearing on the supporting frame. On the periphery of the
reservoir y are formed a series of ratchet teeth g', Figures 5 and 14, which are
engaged by a pawl 9 pivoted at go to an ear go on the flange g*.
The oscillating movements of the frame d, cause the pawl to impart a
step by step rotary movement to the reservoir g so that the nails which accu-
mulate in the lower portion of the reservoir are carried upwardly by the buckets
thereof until they reach the upper portion from whence they are discharged by
gravitation into a deflector ", "Figures 3 and 14, which is attached to the fixed
stud and guides the nails into the upper end of the chute. One side of the
deflector is left open, so that the surplus nails falling into the same may
readily escape.
Such nails as slide down the deflector with their points
downwards properly enter the raceway, so that the heads of the nails bear upon
the upper edges of the walls which constitute the raceway, the shanks of the
nails being suspended between said walls, as clearly shown in Figures 3 and 14.
The raceway is provided with a top plate d", which covers the heads of the
nails when they are in position to slide down the raceway, as shown in Figures 2
and 3.
The frame d' has an upwardly projecting arm d³, Figs. 3, 8 and 11, to the upper
portion of which is connected an extension d, in which is formed an inclined
groove, the sides of which co-operate with a trundle roll on a stud 6* affixed
to the carrier b. The downward movements of the carrier b cause the roll /³ to
bear upon the lower side of said groove do, and thus give the frame d¹ and the
raceway da lateral movement in the direction indicated by the arrow in Figure 8
to the position shown in Fig. 11. This movement carries the lower end of the
raceway from the position it occupies when it coincides with the nail pocket e¹
in the fixed receiver e to a position at one side of said pocket so that the ejector /
can move forward and eject the nail from the pocket e. The upward movement
of the carrier from the position shown in Figure 11 to that shown in Figure 8
causes the roll b³ to restore the frame d¹ to the position shown in Figure 8, thus
again bringing the lower end of the raceway into position to coincide with the
nail-receiving pocket e¹.
A stop screw d, Figures 3 and 14, is affixed to the head a', and is provided with
two nuts ded" which are engaged with and adjustable upon its threaded portion.
The swinging frame d is provided with an ear dis loosely surrounding the stop-
screw d. When the frame d' is swung to the position in which the end of the
raceway coincides with the pocket the ear d, striking against the nut d", will

page_text: stop its further movement in that direction, and when the frame is swung in the
other direction the nut d" will similarly stop its movement.
The extension d', having the groove do on which the roll 68 acts to oscillate the
frame, is connected by a pivot d to the arm d on the frame d¹, and is normally
held against the stud or stop screw in the arm by a spring do, one end of
which is attached to the frame and the other end to an arm dio on the extension d'.
This construction permits a yielding movement of the extension d when the roll 6³
is being depressed to swing the frame d' in the direction indicated by the arrow
in Figure 8, so that injury to the mechanism is avoided in case there be any
obstruction to the movement of the frame din said direction. .
The lower end of the carrier b carries a nail receiving and centering device 6*
into which the nails are forced by the ejector f from the fixed pocket e¹ when the
carrier is depressed so as to bring said receiving and centering device into connection
with the said fixed pocket e'. The nail receiving and centering device comprises
a block or frame made in two sections 31, 31, as best shown in Figs. 23 to 30,
inclusive, which are provided with lateral flanges 32 projecting into a slot formed
in the lower portion of the carrier b. Between the flanges 32 is formed a vertical
slot 33, the sides of which are provided with shoulders 34, 34 arranged to support
the head of a nail, as indicated in Figs. 27 and 30, when the nail is pushed into the
slot 33 by the ejector f. The slot 33 communicates with a vertical channel or
way 35 in which the driver c¹ works. At the lower portion of the vertical
channel 35 are two centering jaws 38 which are adapted to hold the nail centrally
for the action of the driver, said jaws being located in recesses in the sections 31
at opposite sides of the driver-receiving channel and pivoted at 39 39. The lower
ends of the jaws 38 38 are pressed together lightly by a spring 40, which is
connected with studs 41 41 secured to id jaws and projecting outwardly through
slots 42 in the sections 31. The inne
Figure 27, so that their lower ends are
nail shank and hold the nail in a central
elapses between the insertion of each nail
the driver, the jaws yielding to permit the
driver descends.
of the jaws are inclined, as shown in
ed to arrest the lower portion of the
'ion during the very brief time that
the channel 35 and the descent of
1 to pass between them when the
The shoulders 34, which support the heads on the nails, are preferably inclined,
as shown in Figures 28 and 30, so that as the nails are pushed into the slot 33 by
the ejector there will be no liability of their moving forward accidentally into
the vertical driver-receiving channel 35, the inclination of the shoulders 34 requiring
positive pressure to insert the nails in the said channel.
The carrier 6 is reciprocated vertically in the guides o¹ 6 by means of a trundle
roll h on a cam ' which is affixed to a positively rotated shaft h², said shaft being
the main shaft of the machine and giving motion to all the operative parts thereof.
The roll h enters the sloth formed in a piece or plate affixed to the carrier b.
The engagement of the roll h with the slot causes the revolving movement of
said roll by the rotation of the shaft A³ to alternately raise and lower the carrier b.
The central portion of the slot ³ is curved as shown at 4, Figures 3 and 23, said
curved portion being formed and arranged to permit the carrier to remain at rest
during a part of the rotation of the shaft h' when the carrier is at its lowest point,
as shown in Figures 16 and 17, time being thus afforded for the insertion of a nail
into the slot 33 of the nail receiving and centering device and for the operation of
the driver while the carrier is depressed.
The driver bar c is operated as follows-
When the carrier b is raised from the position shown in Figs. 16 and 17 by the
revolution of the trundle roll hit raises with it the driver bar c, the latter having a
washer c on its upper portion, which, when the driver is depressed bears upon the
upper end of the carrier b. The washer is preferably of elastic material to serve
as a cushion when the driver bar is depressed.
The described upward movement of the carrier 6 and the driver bar c brings a
notch or recesse, Figures 3, 16 and 17, in the driver bar into engagement with a

page_text: locking pin or detent e, which is adapted to slide horizontally in an orifice in the
guide . Said detent is normally pressed inwardly so as to automatically engage
the notch e* by means of a spring, Figs. 1, 16 and 17, which is attached at one
end to a fixed support and at the opposite end to an arm c² affixed to a rock shaft c
which is journalled in bearings on the supporting frame and is provided with an
arm c³ having at its outer end a stud 20 which enters a groove in the head of the
detent c. To the rock shaft is affixed an arm e" which is provided with a
trundle roll es which is held by the stress of the spring e against a cam c¹ on the
driving shaft h². The combined action of the cam and spring oscillate the rock
shaft and its arm c³, thus alternately moving the detent in and out. The
detent is moved inwardly and pressed against the driver bar while the latter is
being raised, and engages the notch and arrests the driver bar in its raised
position, as shown in Figure 3. The driver bar is held thus raised until the cam c¹
in its rotation moves the rock shaft c through the lever c" in the direction required
to retract the detent c³, the driver bar being thus released.
When the driving bar is released as above described it is forcibly depressed so
as to cause the driver to drive a nail, by means of two springs els c¹s attached at
their lower ends to adjustable eye-bolts c¹ ce secured to an ear e" on the lower
fixed guide b³, and at their upper ends to ears 18 on an arm attached to the
driver bar.
The ejector is a thin metal plate attached to a dovetailed slide which is fitted
to move in a guide f* attached to the swinging frame d'. Said ejector is reciprocated
by means of a lever f³ having three arms 43, 44, and 45, Fig. 5. Said lever is
mounted to oscillate upon a stud f affixed to the frame d, and its arms 44 and 45
arranged to be acted on by two projections 46 and 47, Figure 5, on the cam h³.
The other arm 43 is provided with a slot which receives a stud 48 on the slide f¹.
The cam projections 46 and 47 and the lever arms 44 and 45 are arranged in
different planes, the projection 46 being arranged to act on the arm 45, while the
projection 47 is arranged to act on the arm 44. The cam projections act alternately,
and when the projection 46 engages a trundle roll 45' on the arm 45 it moves the
lever in the direction required to move the slide f¹ forward and force the ejector
into the nail receiving and centering device, as shown in Figure 18, this movement
occuring when the carrier bis depressed and the nail raceway moved laterally to
the position shown in Figure 11 to cause its lower end to clear the fixed nail
pocket . The projection 47 acts immediately after the projection 46, and by
striking a trundle roll 44¹ on the arm 44 moves the lever in the opposite direction,
thus moving the slide f¹ backwardly, and withdrawing the ejector f from the nail
receiving and centering device and from the fixed pocket e¹.
The arm 45 is adapted to move independently of the arms 43 and 44 to a slight
extent, it being made in a separate piece which is adapted to turn independently on
the stud f. A spring fattached to the arm 43 and bearing at its free end upon
the arm 45 normally holds a stop screw in an ear on the arm 45 against a seat
or abutment on the arm 43. This construction permits the arm 45 to yield during
the forward movement of the ejector, so that if there should happen to be an
obstruction in the way of the ejector the arm 45 would yield to allow the ejector to
be arrested by such obstruction, so that there would be no damage to any of the
parts, as there might be if the forward movement of the ejector were positive.
The cam projections 46 and 47, which do not partake of the oscillating
movements of the frame d, must be sufficiently wide to keep them in operative
relation to the arms 44 and 45, which, being carried by the frame d³, oscillate
with it.
The operation of the mechanism above described is as follows-
The swinging frame d' being in the position shown in Figures 8 and 9, so that
the lower end of the raceway coincides with the nail receiving pocket el in the fixed
plate e, the lowest nail in the raceway slides into said pocket by gravitation, as
indicated in Figure 3. The nail thus received by the pocket is supported in
said pocket by the engagement of its head with the shoulders at the sides of the

page_text: pocket, the head resting on said shoulders in the same manner that it rests on the
edges of the raceway. The nail is prevented from falling laterally out of the pocket
by means of a downwardly projecting lip or flange i on a plate i¹ affixed to the
lower end of the raceway, see Figures 3, 34, 8 and 11. The lip i is shorter than
the plate, and is of such length that when the raceway is moved laterally from
the position shown in Figures 6 and 8 to that shown in Figures 7 and 11, said lip
will leave the pocket e so that the upper end of said pocket will be unobstructed
to permit the nail therein to move laterally into the slot 33 of the nail receiving
and centering device, said lateral movement being effected by the forward movement
of the ejector which takes place while the raceway is moved laterally to the
position shown in Figures 7 and 11.
Prior to the forward movement of the ejector the carrier 6 is depressed, as
shown in Figures 16, 17 and 18, so that the slot 33 of the nail receiving and
centering device coincides with the fixed nail pocket e, hence the forward
movement of the ejector forces the nail from the pocket el into said slot 33,
the ejector being formed to pass through said pocket and into the slot, as shown in
Figure 18.
The ejector is arranged to force the nail into the driver channel 35 at a point
above the centering jaws 38, the nail dropping between said jaws to the position
shown in Figures 18 and 27.
After the nail has been thus deposited between the jaws 38 38 the driver, which
up to this point had been arrested in its raised position by the detent c', as shown
in Figures 3 and 16, is released by the withdrawal of said detent, and is forcibly
depressed by the springs c, thus causing the driver to drive the nail into the boot
or shoe which is supported under the nail receiving and centering device by a
horn j, as shown in Figure 17. After the driving of the nail the carrier b is raised
to the position shown in Figure 3, carrying with it the nail receiving and centering
device and the driver bar, the latter being engaged, when it reaches the highest
point in its movement, by the detent es, as already described, so that it is ready to
give the next nail driving blow.
i
after the
The raceway is moved back to the position shown in Figures 6 a
driving of the nail, and deposits another nail in the pocket e, when the operation is
again repeated, and so on.
It will be remembered that the oscillating movement of the frame & which
carries the raceway into and out of line with the fixed pocket e', also, through the
pawl which oscillates with said arm, gives the nail reservoir a step by step
rotation in the manner above described, so that there is a constant discharge of
nails from the buckets of said reservoir into the hopper or deflector g", so that the
raceway is kept supplied with nails.
The fixed plate e, in which the nail pocket e¹ is formed, obstructs the lower end
of the raceway, as shown in Figures 7 and 18, when the latter is moved away from
the position shown in Figures 6 and 8, so that the lowest nail in the raceway cannot
escape until the lower end of the raceway is again brought into line with the
pocket e by the return movement of the raceway to the position shown in
Figures 6 and 8.
To prevent the nails from binding in the raceway while they are sliding down
the same I provide a hammer r, Figure 2, arranged to strike a rapid succession of
light blows upon the bottom of the raceway, and thereby sufficiently jar the latter
to prevent binding of the nails therein. Said hammer is formed on a bell-crank
lever, which is pivoted at to the raceway. One arm of said lever has a stud³,
which bears against a plate having a wavy or undulating edge, attached to the
carrier b. A spring attached at one end to a part of the supporting frame and
at the other end to one arm of the lever r¹ normally pulls the hammer against the
bottom of the raceway and holds the other arm of the lever r¹ against the undulating
edge of the plate. It will be seen that the vertical movements of the carrier b
cause the plate, which moves with said carrier, to vibrate the lever r³, thus
causing the hammer to strike a succession of blows upon the raceway.

page_text: It will be observed that the driver bar is raised by the upward movement of the
carrier b, said carrier and the mechanism that operates it affording a simple and
efficient means for elevating the driver bar and preparing it for its next descent.
The horn which supports the work is supported by the supporting base or
pedestal a. and is preferably adapted to yield by means of a spring k, Figures 1
and 14, inserted in a socket in the pedestal, so that the work can yield somewhat to
the blow of the driver, although not freely, the spring k being quite stiff and
strong.
The horn is vertically adjustable so that its supporting end may be raised or
lowered to provide a suitable distance between it and the lower portion or throat
of the nail receiving and centering device, said distance varying with the thickness
of the work. The adjustment of the horn is preferably accomplished by screw
threading its lower portion; and engaging its said screw-threaded portion with
an internally threaded socket which bears on the spring k and is adapted to move
vertically in the socket in the pedestal. In Figure 1, I have shown the horn as
provided with a hand-wheel 1 which is rigidly attached to the horn and enables the
operator to readily rotate it for the purpose of adjustment.
The horn shown in Figure 1 is straight, but, if desired, a horn which is curved
at its upper portion, as shown in Figure 14, may be used.
The machine is provided with a feeding device, which consists of a dog m,
Figures 2, 3, 5, 11 and 12, attached to a lever m² which is pivoted at m² to an
arm m³ attached to and projecting laterally from a slide m' which is adapted to.
move in fixed horizontal guides m' on the supporting frame. The dog m is enabled
by the slide m' to move forward and backward to a slight extent, and is moved in
one direction by a spring me. The pivotal connection of the lever m¹ to the arm m³
enables the dog m to swing laterally. The spring me is arranged diagonally so that
it has a tendency to move the dog in the direction indicated by the arrow in
Figure 12. The dog is moved positively in an opposite direction by means of a
sliding arm m' which is adapted to move in a slot in the slide m', and is pivoted at
one end to the lower end of a lever m³, Figure 1, which lever is pivoted at m² to
the supporting frame, and has at its upper end a trundle roll m100 which is held by
a spring m against the face of a cam m" on the shaft h². The rotation of the
cam m causes the lever m³ to oscillate, and thus alternately move the dog in one
direction and permit the spring me to move it in the opposite direction. The
arm m has an incline m² on its front edge. When the arm is moving toward the
right from the position shown in Figure 12, said incline permits the slide m* to be
moved backwardly a distance equal to the depth of the incline, the spring at the
same time moving the dog in the direction indicated by the arrow. The dog is
thus moved backward and sidewise simultaneously. When the arm m' is moved in
the opposite direction the incline mo, in passing through the slide m³, moves the
same outwardly, the end of the arm at the same time moving the lever m¹ and
dog m in a direction opposite that indicated by the arrow, the dog being thus given
a positive work-feeding movement while projected. The length of the feed move-
ment may be varied by means of an adjustable screw m", which is inserted in the
lever m and bears on the slide m' when the lever has moved far enough in one
direction. The dog is thus caused to feed the work, which is held against it by the
operator aided by the horn. I do not limit myself to this form of feed mechanism,
but may use any other suitable mechanism for the same purpose.
The driving shaft is rotated by a pulley o, which is normally loose upon the
shaft, and is continuously rotated by a belt connecting it with a suitable driving
shaft, an automatic stop motion being provided, preferably of the construction
shown in Figure 20, to disconnect the driving pulley from the shaft h at the end
of each complete rotation of the latter, so that the shaft is stopped after each
descent and ascent of the driver, the shaft being stopped when the driver o and
carrier 6 are raised, and requiring an act of the operator to again set it in motion.
A lever o¹, forming a part of the automatic stop motion above described, is con-
nected by a cord or chain o' with a treadle, not shown, which is conveniently

page_text: arranged to be depressed by the operator whenever it is desired to start the
machine in operation, the depression of said treadle causing the lever o¹ to connect
the pulley o positively with the shaft h².
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. In a nail driving machine, the combination substantially as set forth of a
vertically movable nail holding throat, a carrier supporting the same, means for
raising and depressing the carrier to alternately elevate the throat above its
operative position and restore it thereto, a driver bar which, when depressed, is
supported by said carrier and is raised by the upward movement of said carrier,
and automatic means for locking the driver bar to the fixed frame of the machine
in the raised position of said bar and for automatically releasing the same to permit
the operation of the driver, as set forth.
2. In a nail driving machine, the combination of a nail raceway, means for
oscillating the same laterally, a fixed pocket formed and arranged to receive a nail
from the lower end of the raceway when the latter is in a given position, guides
attached to the raceway at one side of the nail conducting passage therein, an
ejector movable in said guides, and means for reciprocating said ejector to cause it
to enter the fixed pocket and eject the nail therefrom when the raceway is in a
different position, as set forth.
3. In a nail driving machine, the combination of the inclined nail raceway, means
for oscillating the same laterally, a fixed plate at the lower end of the raceway
having a nail receiving pocket which registers with the raceway and receives a nail
therefrom when the raceway is in a given position, said plate covering the lower
end of the raceway when the latter is moved from said position, a lip i attached to
the raceway and formed to project over the said pocket and retain a nail therein
when the raceway is in position to register with said pocket, the said lip being
removed from the pocket when the raceway is moved away from its registering
position, and a reciprocating ejector arranged to eject the nail from said pocket
when the said lip is removed therefromn, as set forth.
4. In a nail driving machine, the combination of the inclined nail raceway, the
pivoted frame supporting the raceway, means for oscillating said frame on its
pivot, the nail reservoir mounted to rotate about the upper end of the raceway on
a fixed bearing and provided with an opening in one side receiving the upper end
of the raceway, a pawl connected to the oscillating frame and a ratchet connected
with the reservoir and engaged with said pawl, whereby the oscillating movements
of the frame are caused to rotate the reservoir step by step, as set forth.
the
5. In a nail driving machine, the combination of the inclined nail raceway,
pivoted frame supporting the raceway, means for oscillating said frame on its pivot,
the circular nail reservoir having internal buckets arranged to rotate about the
upper end of the raceway, a fixed bearing for said reservoir, and connections
between the reservoir and the oscillating frame whereby the reservoir is rotated
by the movements of the frame, as set forth.
6. In a nail driving machine, the combination of the inclined nail raceway, the-
oscillating frame supporting the raceway, the circular nail reservoir having internal
buckets arranged to rotate about the upper end of the raceway, and a side opening
receiving the upper end of the raceway, connections between the reservoir and the
oscillating frame whereby the reservoir is rotated by the movements of the frame,
and a hopper or deflector arranged within the circle of buckets over the upper end
of the raceway and adapted to guide the nails dropping from the buckets into the
raceway, as set forth.
7. In a nail driving machine, the combination of the inclined nail raceway, the
oscillating frame supporting the same, the nail hopper formed on said frame and
provided with a circular flange gª which is concentric with the axis on which the
frame oscillates, the upper portion of the raceway entering said hopper, the circular

page_text: reservoir adapted to rotate in a fixed bearing which is in line with the axis of the
frame, said reservoir having a series of internal buckets the outer sides of which
are closed by the fixed flange g, and a pawl supported by said flange and oscillated
therewith, said pawl engaging ratchet teeth on the reservoir, as set forth.
8. In a nail driving machine, the combination of the nail raceway, the oscillating
frame supporting the raceway, a vertically reciprocating carrier having at its
lower portion a nail receiving and centering device, means for moving said carrier
up and down, connections between said carrier and frame whereby the frame and
raceway are oscillated by the movements of the carrier, means for transferring
nails one at a time from the raceway to the nail receiving device when the latter is
depressed, and a driver adapted to drive the nails, as set forth.
9. In a nail driving machine, the combination of the nail raceway, the oscillating
frame supporting the raceway, a vertically reciprocating carrier having at its lower
portion a nail receiving and centering device, means for moving said carrier up
and down, connections between said carrier and frame whereby the frame and race-
way are oscillated by the movements of the carrier, a fixed plate having a nail
receiving pocket which registers with the lower end of the raceway when the latter
is at one extreme of its movement and with the nail receiving device of the carrier
when the latter is depressed, an ejector carried by the raceway and arranged to
enter the fixed pocket when the raceway is out of register therewith, means for
moving said ejector to cause it to enter said pocket and force a nail therefrom into
the nail receiving device of the carrier, and a device adapted to drive the nails
thus supplied to the said nail receiving device, as set forth.
to co-
10. In a nail driving machine, the combination of the nail raceway, the oscillatory
frame supporting the raceway and provided with an arm having an inclined slot,
the verti y reciprocating carrier provided at its upper end with a stud adapted
te with said inclined slot in oscillating the frame and raceway, and
end with a nail receiving device, means for transferring nails one at
a the raceway to the said nail receiving device when the latter is
and a driver adapted to drive the nails thus inserted in said receiving
et forth.
at its
a tim
depies.
device,
11. II
"
nail driving machine, the combination of the inclined raceway, the
swinging ame supporting the raceway, means for oscillating said frame and race-
way, a fid plate having a nail receiving pocket arranged to register with the
raceway ten the latter is at one extreme of its movement, an ejector carried by a
slide fitted to move in a guide which moves with the raceway, the three-armed
lever pivoted to the swinging frame and engaged with the ejector slide, and the
cam projections 46, 47 on the driving shaft arranged to act on said lever and
through the latter give the ejector a back and forth movement, as set forth.
12. In a nail driving machine, the combination of the swinging frame, the race-
way attached thereto, the arm d³ on said frame, the extension pivoted to said
arm and provided with the inclined slot d, the vertically reciprocating carrier
having a stud b adapted to co-operate with said inclined slot, and a spring d
arranged to hold the extension d yieldingly against a stop on the arm d³, whereby
a yielding movement is imparted to the frame and raceway in one direction, as
set forth.
13. In a nail driving machine, the combination of the ejector, its carrying slide,
the lever composed of the rigidly connected arms 43, 44, and the pivoted arm 45,
the cam projections arranged to act alternately on the arms 44 and 45, and a
spring which yieldingly holds the arm 45 against a stop on the other part of
the lever, whereby a forward yielding movement is imparted to the ejector, as
set forth.
14. In a nail driving machine, the combination of the carrier, means for recipro-
cating it vertically in fixed guides, a nail receiving device attached to the lower
end of the carrier, means for inserting a nail in said device when the carrier is
depressed, a driver bar fitted to move vertically in the carrier and provided with
a driver and with an operating spring or springs, the stress of which is supported

page_text: by the carrier when the driver bar is depressed, the driver bar being raised from
its depressed position by the upward movement of the carrier, a detent engaged
with a fixed support and adapted to arrest the driver bar when it has been raised
by the carrier, so that the next depression of the carrier will leave the driver bar
in its raised position, and means for retracting said detent and releasing the driver
bar after the insertion of a nail into the nail receiving device of the carrier, as
set forth.
15. In a nail driving machine, the combination with the vertically reciprocating
carrier, of the driver bar adapted to slide vertically therein, the depressing spring
or springs for said driver bar, a fixed guide in which the carrier and driver bar are
vertically movable, the detent c adapted to slide in an orifice in said guide, a rock
shaft connected with said detent, and means for oscillating said rock shaft to
alternately project and withdraw the detent, the latter being thus engaged with
and disengaged from the driver bar, as set forth.
16. In a nail driving machine, the combination of the supporting frame, a shaft
mounted in bearings on said frame and provided with an eccentrically arranged
stud h, the carrier fitted to move vertically in fixed guides on said frame, and an
ear attached to said carrier and provided with a sloth having a curved portion *,
said slot receiving the stud h, the latter reciprocating the carrier and holding it at
rest while passing through the curved portion, as set forth.
17. In a nail driving machine, the nail receiving and centering device having
the nail receiving slot 33, the vertical driver receiving channel 35 communicating
with said slot, and the spring pressed nail centering jaws in said channel below
the slot 33, as set forth.
18. In a nail driving machine, the nail receiving and centering device having
the nail receiving slot 33, the nail head supporting shoulders on the sides of said
slot, the vertical driver receiving channel 35, and the yielding centering jaws in
said channel below the slot 33, combined with means for inserting nails in said
slot, and a driver adapted to drive said nails from between the centering jaws, as
set forth.
19. In a nail driving machine, the combination with the vertically reciprocating
carrier, of the nail receiving and centering device composed of the sections 31, 31,
attached to the lower end of the carrier and provided with the shouldered naiĺ
receiving slot 33, the driver receiving channel 35, and the jaws 38 pivoted at their
upper ends to said sections and pressed inwardly at their lower ends by a spring,
as set forth.
20. In a nail driving machine, the combination of the raceway, the lever od
pivoted thereto, one arm of said lever having a hammer r arranged to strike the
raceway, a reciprocating corrugated plate in contact with the other arm of said
lexer, and a spring which presses said arm against the corrugated plate as
set forth.
21. In a nail driving machine, the combination with the supporting frame and
nail driving mechanism thereon, of the work feeding device, consisting of a
slide m' fitted to move in guides on the supporting frame, a lever pivoted at
one end to a stud on said slide, a feed dog m on the swinging end of said
lever, a spring me which normally retracts said dog and gives it a lateral move-
ment in one direction, a positively reciprocated slide m' movable in a slot in the
slide m and provided with an incline m10 which, in co-operation with the spring m³,
moves the slide forward and backward, one end of said slide bearing on the lever m²,
all arranged and operating substantially as described.
Dated this 14th day of September 1891.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.