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Патент USA US2113458

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April 5, 1938. Q
2,113,458
E. C. BAKER ET AL
TACK MACHINE
Filed July 25, 1936
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April 5, 1938. ‘
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TACK MACHINE
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Edward C Baker:
DeZéert Wffarzsorz,
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April 5, 1938.
E. c. BAKER ET AL
2,1 13,458
TACK MACHINE
Filed July 25, 1956
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Patented Apr. 5, 1938
.
2,113,458
UNITED STATES PATENT OFFICE
2,113,458
TACK MACHINE
Edward C. Baker and Delbert W. Manson, Brock
ton, Mass, assignors, by direct and mesne as
signments, to D. B. Gurney Company, Whit
man, Mass, a corporation ‘of Massachusetts
Application July 25, 1936, Serial No. 92,584"
14 Claims.
This invention pertains to machines for mak
(01. 10--173)
to indicate the relationship of the new mecha
ing cut tacks or nails, and relates more particu
nism thereto;
larly to improvements in mechanism for feeding
. . .Fig. 2 is a fragmentary front view, to smaller
and presenting the tack strip to the cutter,—the
scale, showing the upper part of the tack ma
chine and illustrating the novel mechanism for ,5
.5 present invention constituting an improvement
.
upon that disclosed in the patents to Baker et al.,
No. 1,555,933, dated October 6, 1925 and No.
1,864,267, dated June 21, 1932.
One principal object of the present invention
is to provide strip feeding means of improved
type designed to present the end of the tack
actuating the tack strip feed;
strip to the cutter with such accuracy as to per
mit the cutting of tacks having very ?ne and
Fig. 3, showing details of the improved barrel
accurately shaped points, for example, shoe tacks,
Fig. 5 is an elevation to- large scale showing
the saddle-retaining pin removed from the sad- l5
and to this end the improved mechanism com
prises means for positively advancing the tack
strip toward the cutters having provision for
accurate'adjustment' of the timing of the ad
vance movement of the strip relatively to the
20 working stroke of the cutters.
A further object is to provide strip advancing
means which receives its movement directly from
the main shaft of the machine thereby to insure
proper timing, but so devised asnot to obstruct
the tack maker in his duties in adjusting or re
placing the cutters, etc.
I.
A further object is to provide for both a coarse
and a fine adjustment of the strip feed, with
‘provision for making such adjustments without
30 interference with other settings of the mecha
nism.
’
‘
A furtherobject is to provide means for re
tracting the tack strip from the path of the
cutter as the latter rises, thereby to- avoid dull
nism. of Fig. 1;
retaining saddle;
dle;
improved tension for the feed rolls; to provide an
improved nose piece such as to expose the tack
strip freely to view as it approaches the cutter,
and so devised,that it will not readily become
clogged with accumulations of lime from the
strip; and to provide a simple and effective sig
nal to show when the strip needs replenishment.
Further objects and advantages of the inven
tion
will be made apparent in the following more
50
detailed description and by reference to the ap
pended drawings wherein
V
Fig. 1 is a fragmentary side elevation of the
improved feed mechanism, together with so much
of a usual type of tack machine as is necessary
.
1
,
.
'
. Fig. 6 is a bottom view of the pin of Fig. 5’;
Fig. 7 isfa fragmentary bottom view of the
saddle of Fig. 4 showing the means for holding
the pin in operative position;
‘
Fig. 8 is a fragmentary plan view showing the
saddle and a part of the barrel and adjacent ele
ments;
20
‘
Fig. 9 is a fragmentary plan view showing the
means for retracting the barrel after each cut 25
ting operation;
'
Fig. 10 is a fragmentary vertical section sub
stantially on the line l0——|0 of Fig. 9;
. Fig. 11 is a developed view of the barrel-re
tracting cam illustrated in Figs. 9 and 10;
30
Fig. 12 is a fragmentary plan view of the de
livery end of the barrel with its attached nose
piece,—- the feed roll housing, and the means
for driving the feed'rolls; .
'
.
‘
Fig. 13 is a vertical section substantially on '35
the line l3—l3' of Fig. 12;
ing cutters with the end of the tack strip.
A further object is to provide an improved
' ing the barrel in operative position; to provide an
'
Fig. 4 is a fragmentary vertical section to 10
larger scale, substantially on the line 4-‘4- of
‘’ ing the cutters by contact of the upwardly mov
support or bearing for the strip guiding barrel,
40 tovprovide a readily removable saddle for retain
' '
Fig. 3 is a fragmentary side elevation, to
larger scale, showing details of the feed mecha
Fig. 14 is a vertical section substantially on
the line l4—l4 of Fig. 12;
'
Fig. 15 is a fragmentary‘perspeotive View with 40
the several associated parts separated from each
other, showing details of the feed roll vloading
‘devices and illustrating an‘ upper feed roll of a
modi?ed type;
'
‘
'
'
Fig. 16 is a perspective view to large scale
illustrating a part of the mechanism for driv
ingthe feed rolls;
Fig. 17 is’ a fragmentary longitudinal section
showing one end of the eccentric rod with its
adjustable snap connection;
50
Fig. 18 is a plan view of one desirable form
of nose piece, shown as removed from the bar
rel;
'
‘Fig. 19 is an edge elevation of the nose piece
vof .
18;
2..
2,113,458
Fig. 20 is a plan view of a modi?ed form of
nose piece;
end of the tack strip out of contact with the cut
ters as they retract, thus avoiding unnecessary
Fig. 21 is an edge elevation of the nose piece‘ dulling of the cutters.
of Fig. 19;
The frame member 9 also supports a bracket
Fig. 22 is a fragmentary plan view of a signal
device operative to show when the tack strip
needs replenishment;
>
Fig. 23 is a fragmentary elevation, partly in
vertical section and to larger scale, illustrating a
10 preferred and modi?ed feed actuating mecha
nism;
Fig. 24 is a section on the line 24—24 of Fig.
23; and
>
Fig. 25 is a detail View, in perspective, of one
15 element of the mechanism of Figs. 23 and 24.
Referring to the drawings, the numeral I des
23.5
ignates the main frame ofa tack or nail ma
chine of a usual type, such machine having the
upper end of which bears against a collar 33 ad
main drive shaft 2 provided at one end‘ with a
justably ?xed to a retaining pin 34. This pin is
The machine frame also supports the ?xed anvil
block 5 (Fig. 3) which carries the stationary or
ledger blade 6 with which cooperate the cutters
furnished with, a handle 35 at its upper end and 20
passes freely down through an opening in the
arm 30. The lower end of this pin 34 is fur
nished with a transverse locking ‘element 35 (Fig.
1 and 8, which, together with the forming tools
6), and the bracket arm 28 is furnished with an
and other adjunctive features common to the
art, receive their motion through suitable con
nections actuated by the main shaft 2.
The frame also comprises the forwardly ex
tending supporting arm 9 which carries appro
priate bearings in which oscillates the hollow
barrel I8 which receives and guides the tack
strip on its Way to the cutters. This barrel is
oscillated by means of a pair of oppositely wound
straps II and I2 which are pulled downward
elongate slot 31 (Fig. 7) through which this 25
member 36 may be passed when disposed in
registry with the slot. However, after the mem
ber 36 has been passed through the slot 31, a
quarter turn of the pin 34 will dispose the mem
ber‘38 out of registry with the slot 31 and be 30
low the lower surface of the bracket, as shown
in Fig. 7, so that the pin is locked in position
with the spring 32 holding the saddle or bearing
member 3| in resilient contact with the barrel.
alternately by appropriate mechanism, not
shown, common in the art. As here illustrated,
the machine is provided with a stand l3 which
‘supports a reel | 4 upon which is wound a coil
of tack strip l5, the strip entering the left-hand
140 end of the barrel, as viewed in Fig. l, and mov
50
29 whose axis is substantially parallel to that
of the barrel and which supports a vertically
swinging saddle arm 30 to the free end of which 10
is secured a bearing member 3| which normally
rests upon the upper part of the barrel II). This
member 3| may be of any suitable material,
preferably of a type which will form a good
bearing contact with the barrel. ‘This bearing 15
member is urged downwardly against the barrel
by means of a coiled compression spring 32, the
20 hand wheel 3 (Fig. 2) and with a drive pulley 4.
"30
21“ which carries a laterally directed arm 28
(Fig. 4) having an upstanding ear 28a near its
free end. This ear provides bearings for a pin
This arrangement provides for holding the de
the ledger blade 6, although permitting the bar
rel to rise as it oscillates and the tack strip turns
about its narrow edge from one side to the other. 40
ing longitudinally of the barrel toward the right
Furthermore, merely by depressing the pin 34
hand or delivery end of the latter.
The frame member 9 carries the upstanding
stationary bracket l6 which in accordance with
the present invention is provided with a bearing
for a swivel member I‘! having a Vertical spindle
| 8 turning in a socket in the bracket Hi. This
swivel member |'| supports a ball bearing l9
within which the barrel I8 is free to turn and
also to slide axially. A coiled. spring 20 encircles
the barrel, bearing at one end against the hous
and turning it a quarter turn, it is possible to
release the saddle 3| from the barrel, whereupon
the entire saddle device including the arm 30
may be swung about the pin 29 and away from
the barrel, thus leaving the operator free to
make such adjustments in the barrel or the feed
ing of the ball bearing l9 and at its other against
a collar 2| ?xed to the barrel,—the spring thus
tending to move the barrel longitudinally toward
the cutters.
In accordance with the present invention, the
barrel is provided with a collar having a radial
cam ?ange 22 (Figs. 1, 9, and 10) such cam
?ange having two substantially radial dwell por
tions 23 at diametrically opposite points, such
dwell points being separated by the bosses 24.
35
livery end of the barrel downwardly so as to
keep the end of the tack strip in contact with
mechanism as may be requisite.
To the right of the saddle device 'just de
scribed, as viewed in Figs. 1‘ and 2, the barrel 50
is provided with a drive actuating sleeve 38 (Fig.
16) arranged to slide freely on the barrel and
having a downwardly directed pin 39 which
moves freely in a slot 40 in an arm 4| (Figs. 1
and 8) ?xed to the bracket 21*’. This actuator 55
sleeve 38 comprises a radial ?ange member 42
and at its left-hand side, as viewed in Figs. 1, 3,
and 16, with a block 43 having an upstanding
stem 44 provided at its upper end with a sub
stantially spherical knob 45 forming one ele 60
ment of a snap fastener.
This cam ?ange cooperates with a roller 25 turn
ing on a vertical stub shaft 26 projecting up
wardly from a bracket 21 ?xed to the frame
Referring to Figs. 1, 2, and 3, the main frame
of the machine is provided with bearings 46, 46a
for a secondary shaft 41 preferably parallel to
member 9. The spring 20 urges the barrel ID to
the right, as viewed in Fig. 1, and thus tends to
keep the cam ?ange 22 always in contact with
the roller 25. The radial dwells 23 and the
the drive shaft 2 and provided with a gear 4'18L 65
which meshes with a gear 48 on the shaft 2 so
away from the cutters in an axial direction im
that the shaft 4'! always turns in substantially
exact consonance with the shaft 2. Preferably
the upper bearings 46 are removable at will, so
that the shaft 41, with the parts ?xed to it, as 70
hereafter described, may be lifted from its bear
ings, turned in one direction or the other, and
mediately upon completion of each down stroke
replaced, so as to cause different teeth of gear
of the cutters, and while the cutters are on their
upward or retracting stroke, so as to keep the
4'!8 to mesh with gear 48. This relative shifting
of the gears ‘provides for a coarse adjustment 75
_ bosses 24 are so arranged that upon each oscilla
70 tion of the barrel, whether in one direction or
the other, the barrel will be bodily retracted
3
2,113,458
of the feed roll drive, as hereinafter more fully
described.
The shaft 41 is provided with an eccentric 49
or equivalent element, here shown as provided
with a split bushing 495 which, together with a
fork member 491), constitutes the eccentric strap.
The fork member is provided with diametrically
opposite adjusting screws 50 which bear upon the
bushing 49a and which permit the effective ec
10 centricity of the member 49 to be varied to- some
extent as well as providing for taking up wear
in the bushing and to allow some freedom of piv
otal movement in a transverse direction to the
eccentric rod. The fork member 49*’ has con
15 nected thereto one end of the eccentric rod 5|,
the latter preferably having screw threads 52 at
its upper end whereby it may be adjusted rela
tively to the yoke or fork member, thus permitting
a ?ne adjustment of the roll driving devices.
20
At its opposite end the eccentric rod 5| is pro
vided with a sleeve member 53 (Fig. 17) which
in contact with the right-hand face of the ?ange
42 of the actuating device by the action of the
spring 66. Thus, as the actuating device 38 is
reciprocated along the barrel ID by the eccentric
49, the bar 63 is also reciprocated and at each
movement toward the right (Fig. 12) turns the
feed roll 60 through a part revolution, the dis-v
tance through which the roll turns being deter
mined by the effective eccentricity ot the member
49. It will be noted that the forward stroke of 10
the pawl is a positive movement, therebeing no
yield between the eccentric and the parts driven
thereby, so- that the advance of the tack strip is
a positive advance and may be gauged with the
greatest nicety, with respect to the operation of
the cutting and forming devices, by the setting of 15.
the gears 4'!a and 48 relatively to each other, and
by the adjustment of the rod 5| relatively to the
yoke 49.
The upper feed r011 10, which in Fig. 14 is shown 20
as having an edge or peripheral surface of sub
may, if desired, be adjustable longitudinally of
stantially V-cross section so as to- provide a nar
the rod, as for example by means of screw
threads and a lock nut,—the sleeve 53 being
row edge for engagement with the tack strip (this
25 closed at its end 54 and having within it a sliding
plug 55 whose left-hand end, as here illustrated,
(Fig. 17) is furnished with a spherically curved
socket. This plug 55 is urged toward the closed
end of the sleeve by means of a spring 56, one of
which bears on the plug and the other against
the end of the rod 5!. Near its closed end the
sleeve 53 is furnished with an opening 51 in its
wall, of such size as to permit the ball or knob
45 of the member 42 to be snapped into the in
terior of the sleeve 53 where it is engaged by the
plug 55, the latter ?rst retracting against the
spring 56 and then snapping back into engage
ment with the knob 45, thereby to provide an
operative connection between the rod 5| and the
40 part 52, so that the latter is constrained to move
longitudinally of the barrel in time with the ro
tation of the shaft 41. However, if it be desired
to disconnect the rod 5|, it is merely necessary to
lift the sleeve 53 with su?icient force to disen
45 gage the ball 45 from its socket 51, whereupon
the rod 5| may be swung upwardly, as shown in
broken lines in Fig. 1, and out of the way so that
it will not interfere with the work of the tack
maker in adjusting or resetting the tack-making
tools.
Referring to Figs. 12 to 14 inclusive, the deliv
ery end of the barrel is shown as provided with
a feed roll housing 58 having bearings for the
shaft 59 of a bottom feed roll 60, which, as illus
trated in Fig. 14, has a substantialy ?at periph
eral work-contacting surface. The shaft 59 ex
tends outwardly at both sides of the housing
member 58, being provided at one end with a
gear BI and at its opposite end with a ratchet
wheel 62. This ratchet wheel projects up into a
slot in a longitudinally movable pawl-carrying
bar 63 which is mounted to slide in bearings in
being especially desirable when using a tack strip
which is of soft material) is carried by a shaft ‘H 25.
having bearings preferably mounted in vertical
slots 12 in the side walls 58a and 58*’ (Fig. 15) of
the feed roll housing. The shaft ‘II is provided
with a gear 6|a which meshes with gear 6|.
These slots 12 receive bearings 13 which, as illus
trated in Fig. 15, are furnished with recesses '14 3.0.
designed to ?t over the edges of the slots 12 so
that the bearings 13 may slide freely in a vertical
direction but without turning in the slots 12. As
shown in Fig. 15, the peripheral edge of the feed 35
roll 10a is ?at like that of the bottom. feed roll (it,
although the V-edge top ‘roll, previously de
scribed, is preferred.
‘
‘
In order to press the top feed roll downwardly
against the tack strip with resilient pressure so
as to insure a proper feed of the strip, it is pref
erable to provide a rocker device such as shown
in Figs. 12 to 15. This rocker device is of sub
stantially T-shape, having the transverse crossbar
l5 and the stem portion 16. The member 1'5 is
furnished with a slot 15a for the reception of the
edge of the upper feed roll, and the member 15
is preferably formed of a length of wire bent to
form a curved or rounded end 11 and having its
extremities secured in the bar 15. By thus mak
ing the member 16, a longitudinal slot 8! is pro; 50.
vided appropriate to receive a pin 82 (Fig. 13)
having a screw-threaded engagement with the
upper part of the housing 58. A coiled spring
83 surrounds this pin and bears at its lower end
on a washer 84 bridging the slot 8| and resting 55.
upon the arms of the member 16. The upper end
of the spring bears against a wing nut 85 at the
upper end of the rod 82. The curved or rounded
end 11 of the member 16 rests upon the upper 60
surface 18 of the housing 58, while the opposite
end portions 79 and 80 of the bar 15 rest upon
bracket members 64 and 55 projecting from the
side of the housing 58. This pawl-carrying bar
63 is urged to the left, as viewed in Fig. 12, by a
the respective bearing members 13. The rocker
spring 65 which is secured at one end to the
it in the most effective position for applying the
tensioning pressure to the bearings 73 and since
it is free to rock about the rounded end 1'? (having
in effect a three point bearing) the two bearing
bracket 65 and at its other end tona pin- 61 project
ing from the bar 63. The bar 63 carries a resil
ient pawl member 68 which engages the teeth of
the ratchet 62, being so arranged that on move
ment of the bar 63 to the right, as viewed in
Fig. 12, the ratchet wheel and the shaft 59, to
gether with the feed roll 60, is turned in a clock
wise direction, as viewed in Fig. 13.
The bar 63 also carries a roll 69 which is held
75
device as a whole may be moved longitudinally
with reference to the pin 82 thereby to dispose
65.
members 73 are permitted to rise and fall more or
less independently so as to insure maintenance oi.‘
proper pressure between the upper and lowerfeed
rolls, even'though one or the other of the bean
ings 13 should not work as freely as intended,
as, for example, by reason of accumulation of u.
2,118,458
4
dust or dirt between it and the edges of the slots
the nose piece is preferably provided with an
‘I2.
elongate shallow recess I0Ia to reduce friction of
the tack strip against the surface of the nose
piece and also to provide clearance for any lime
which may fall from the tack strip on its way
through the nose piece. In this arrangement, in
place of the resilient hold-down arm I04, there
is provided a rigid hold-down member or bridge
piece I04a having a guide opening I05a for the
tack strip and provided at its sides with lugs fur
Near its right-hand end the housing 58 is pro
vided with a transverse shaft or pivot pin 81 upon
which is mounted a nose piece support 86. This
nose piece support is provided at opposite sides
with upstanding ears 88 and 89 (Fig. 12) having
threaded openings for a pair of aligned oppo
sitely directed adjusting screws 90 and 9 I , respec
tively. Near the end of the barrel I0 the housing
58 is also furnished with two pairs of vertically
aligned adjusting screws 93 and 94.
The preferred form of noise piece as here illus
trated (Figs. 18 and 19) comprises an elongate
15 plate 95 having a downwardly directed stud 99
which is adapted to enter an elongate slot 92
(Fig. 12) in the nose piece support 86 and to be
disposed between the ends of the screws 90 and 9 I.
The plate 95 has a substantially ?at upper sur
20 face but is furnished at its left-hand end, as indi
cated in Figs. 18 and 19, with an integral bridge
member 91 having a horizontal slot 98 adapted
to receive and to guide the tack strip as the
latter is delivered from the barrel proper and
25 enters the feed roll housing,
The nose piece is provided with a slot I00
through which the upper part of the lower feed
60 projects, and where the nose piece projects
beyond the housing it is furnished with one or
30 more openings IOI designed to permit any lime
carried by the tack strip- and which may be sepa
rated from the latter as the strip passes through
the nose piece, to escape freely so as not to clog
the nose piece. By adjustment of screws 90 and
9I the end of the nose piece may be swung hori
zontally, and by adjustment of screws 93 and 94
the end of the nose piece may be swung vertically.
In order to hold the tack strip down in proper
position on the nose piece as it traverses the
40 latter, it is preferred to provide a pivot pin I05
projecting upwardly from the nose piece at one
side of the path of movement of the tack strip
and to mount on this pin a resilient leaf-spring
hold-down arm I04 preferably provided at its free
45 end with an opening I06 designed to be snapped
over a. pin I 01 at the other side of the nose piece
and diagonally disposed with respect to the pin
I05.
The delivery end of the nose piece is preferably
50 furnished with an integral. bridge member I02
having an elongate slot I09 for guiding and di
recting the tack strip as the latter approaches
the cutters.
Normally the hold-down arm I04 occupies the
55 full line position of Fig. 18, thus overlying the
tack strip which extends from the guide opening
98 to the guide opening I03 and which is con
?ned and held against the upper surface of the
plate 95 by the resilient hold-down arm. How
60 ever, to facilitate introduction of a new tack
strip or to permit inspection or cleaning of the
nose piece it is possible, by lifting the free end
of the hold-down arm from the pin I01, to swing
the hold-down arm about the pivot I05 to the
65 broken line position of Fig. 18 where it no longer
overlies the nose piece, thus permitting free in
spection of and access to the tack strip and nose
piece.
In Figs. 20 and 21 a modi?ed form of nose piece
70 is shown, this nose piece comprising the elongate
plate member 958‘ having at one end the integral
bridge piece 919‘ furnished with the guide open—
ing 98st and provided at its opposite end with the
integral bridge piece I02a having the guide open»
ing I03“. In this instance the upper surface of
nished with screw-threaded openings IIllIb for the
reception
be held inofadjusted
set screws
position
by means
longitudinally
of which itof the
nose piece.
Such adjustment may be desirable
in dealing with tack strips of different thickness 15
or width or of different materials, and enables
the tack maker to locate this intermediate con
trol of the tack strip at any desired point be
tween that shown in Fig. 20 and the left-hand
20
end of the ?xed bridge member I02?.
In order to indicate to the operator of the ma
chine that it is time to replenish the tack strip,
it is preferred to provide a signal device such as
illustrated, for example, in Figs. 1 and 22. This
signal device comprises a bracket I09 (Fig. 22) 25
carried by the member 9 or other convenient
part and furnished with a stub shaft I0'I on which
is mounted a lever. I08 arranged to swing in a
vertical plane. At one end this lever is furnished
with a counterbalance weight I09 which is ad 30
justable along the lever to provide for accurate
balancing while the other end of the lever is fur
nished with a transversely extending finger or
feeler element IIO which normally underlies the
tack strip I5 at a point between the reel I4 and 35
the receiving end of the barrel I0. So long as
the tack strip continues to move from the reel to
the barrel it holds down the finger I I0 in opposi
tion to the action of the weight I09, but as soon
as the end of the coil of tack strip passes the 40
?nger IIO, the weight I09 swings the lever I08
up to a more or less vertical position, as shown
in broken lines in Fig. 1. In order to make this
movement of the lever more clearly evident to
the operator, it is preferred to mount a target 45
or ?ag III on the lever so that such target or
?ag will be raised as the lever swings and thus
become readily visible to the operator from a sub
stantial distance.
Under certain circumstances, particularly in 50
the larger machines, it has been observed that
the angularity of the rod 5I tends to lift the
barrel during the feed stroke or movement of the
rod to the right, as viewed in Fig. 3. To: avoid
any possibility of actual lifting of the barrel from 55
this cause, it is preferred to employ a modi?ed
construction illustrated by way of example in
Figs. 23 to 25 inclusive.
Referring to the latter ?gures, the numeral Z'Ia
indicates the upper part of the bracket similarly 60
designated in Fig. 1. In this instance the bracket
i‘!a is provided with a substantially horizontal
upper surface upon which rests a plate II2,
preferably provided with a central, downwardly
directed pin II3 which swivels in a socket Ill 65
in the bracket 21*‘. The plate H2 is furnished
with a pair of spaced openings I I5 which receive
adjusting bolts II6,-—the bolts passing loosely
through the openings I I5 so as to permit a slight
adjustment of the plate IIZ angularly about the 70
axis of its pin I I3, after which the bolts I I6 may
be tightened to hold the plate in adjusted posi
tion.
The plate H2 is provided with an upstanding
central boss I I2a (Fig. 23) including a sleeve por 75
5.
2,113,458
tion Ma provided with a horizontal bore con
stituting a guideway for a rod “1. This rod is
provided with a ?xed collar II‘!11 at one end. A
coil spring H8 embraces the rod and bears at its
opposite ends against the collar II'Ia and against
one end of the sleeve 4|“, respectively. The op
posite end of the rod I I1 is preferably reduced in
diameter and screw threaded for engagement
with a screw-threaded bore in a downwardly
10 directed ear I20 forming part of a yoke member
I2I (Fig. 24). This yoke member comprises up
wardly directed arms I22 and I23 de?ning be
tween them a recess I24 having substantially
parallel side walls and a curved bottom wall I25.
15 The barrel I0 is disposed within this recess,--the
recess being of sufficient depth to permit the
necessary up-and-down motion of the barrel dur
ing the operation of the machine, but being of
such width as to keep the barrel accurately posi
20 tioned horizontally.
A bar I26 (Fig. 25) normally closes the upper
end of this recess I24, the bar having openings
I21 and I28 near its opposite ends. The upper
ends of the arms I 22 and I23 of the yoke are
25 slotted to receive the end portions of the bar I 25
respectively, and are also furnished with screw
threaded openings for the reception respectively
of a bolt I29 (which passes through the opening
I2'I of the bar I26 and constitutes a pivot for the
bar) and a wing bolt I30 (which passes through
the opening I28 in the bar I26 and normally
holds the bar ?xed to the yoke). However, by
retraction of the wing bolt I30, the bar may be
swung to the dotted position shown in Fig. 24
35: so as to permit the barrel to be lifted from the
recess I24.
At its central part the bar I26 is provided with
an upwardly inclined neck member 1Ma provided
at its extremity with a knob or ball 45a corre
40 sponding in function to the knob or ball 45 above
described and which is normally received in a
socket in the member 53 carried by the rod 5|.
The latter, as above described, is reciprocated in
time with the rotation of the drive shaft of the
45 machine by means of an eccentric, cam, crank
or equivalent mechanical device. The yoke I2I
corresponds in function to the actuator device 38
above described and is furnished at its left-hand
side, as viewed in Fig. 23, with plate 42a, prefer
50 ably of hardened steel, which bears against roll
69 and performs the same function in this respect
as the ?ange 42 of the actuator above described.
In this construction the yoke or actuator I2I
is positively guided in a rectilinear path by means
of the sleeve Ma and rod Ill, and whatever up
ward component of force may be exerted by the
reciprocating rod 5|, such component is opposed
by the guide elements Ma and II‘! so that no lift
ing effort is applied to the barrel.
60
The general operation of the machine will be
obvious, without speci?c description, to- those
skilled in the art, it being su?'icient to note that
the movement of the feed roll actuator 38 has a
positive movement in the feed direction and is
in substantially exact consonance with the op
eration of the main drive shaft 2, so that the
presentation of the tack strip to the cutters is
very accurately controlled, thus making it pos
sible to cut tacks with accurately shaped points
such as are requisite for certain uses, particularly
in the shoe trade. It is further to- be noted, as
above pointed out, that this feed movement is
capable of both coarse and ?ne adjustment.
Furthermore, since the eccentric rod 5| may so
75 readily be disconnected, the provision of this
improved drive mechanism need not in any way
interfere with the usual operations of the tack
maker in setting and adjusting the various cut
ting and forming instruments.
While desirable features of the invention have
been herein speci?cally described, it is to be un
derstood that the invention is not necessarily
limited to the details of construction illustrated,
but that the invention is capable of embodiment
in various other arrangements of parts and ‘that 10V
all equivalents and variations falling within the
scope of the appended claims are to be regarded
as a part of the present invention.
We claim:
,
.
-
-
1. In combination with a tack or nail ‘machine 15
having a rotary drive shaft, cutters and forming
tools, an oscillatory strip-guiding barrel, means
for oscillating it, and a pair of strip-feedingrolls
mounted on the barrel, a drive element turning
in consonance with the drive shaft, a reciproca 20.
tory rod actuated by said drive element, a roll
driving pawl, a reciprocable, non-oscillatory pawl
actuator, guide means comprising a normally
?xed part and a relatively sliding part constrain
ing said actuator to move in a predetermined 2.5
rectilinear path lengthwise of the barrel, and
readily disengageable connections between the rod
and actuator.
>
2. In combination with a tack or nail machine
having a rotary drive shaft, cutters and forming 30
tools, an oscillatory strip-guiding barrel, means
for oscillating it, and a pair of strip-feedingrolls
mounted on the barrel, a part moving in conso
nance with the drive shaft, a reciprocatory rod
actuated by said moving part, a roll-driving pawl,
a pawl actuator reciprocable along the barrel,
means whereby the length of the rod may be ad-'
justed, a stern carried by the actuator provided
at its end with a spherically curved knob, and a
sleeve member carried by the rod having therein 40
a socket for the reception of saidknob. '
3. In combination with a tack or ‘nail machine
having ?xed and movable cutters and forming
tools and means for actuating them, an oscil
latory barrel for guiding tack strip to the cutters,
and means for oscillating the barrel, a saddle de~'
vice for yieldingly retaining the delivery end of
the barrel in operative relation to the cutters,
said saddle device comprising an arm hinged to
turn about an axis substantially parallel to that 50
of the barrel and disposed at one side of the
latter, and means yieldingly pressing the free end
of the arm downwardly toward the barrel, said
pressure-applying means comprising a releasable
normally ?xed abutment pin,"a spring reacting
between a portion of the pin and said arm to
hold the arm in barrel-retaining position, and
releasable means normally holding the pin in
operative position but constructed and arranged
to permit release of the pin, thereby to allow the 60
arm with the spring to be swung away from the
barrel.
4. In combination with a tack or nail machine
having ?xed and movable'cutters and forming
tools and means for actuating them, an oscilla
6,5
tory barrel for guiding tack strip to the cutters,
and means for oscillating the barrel, hold-down
means normally operative yieldingly to retain
the delivery end of the barrel in operative rela
tion to the cutters. said hold-down means com
prising a barrel-engaging element movable when
released to a position Wholly at one side of the
barrel, said hold-down means comprising an
abutment pin having .a locking element engaging
a ?xed part of the frame but releasable therefrom 75
6
2,113,458‘
by partial rotation of the pin, and a spring re
acting against an element of said pin normally
operative to keep said barrel-engaging element
in operative relation to the barrel.
5. In combination with a tack and nail ma
chine having cutting and forming tools and
means for actuating them, an oscillatory barrel
for guiding tack strip to the cutters, strip-feed
ing means carried by the barrel and means for
oscillating the barrel, the strip-‘feeding means
comprising a pair of rolls between which the
strip passes on its way to- the cutters, the top
roll at least having movable bearings permitting
the top roll to move bodily toward and from the
15 other roll, and loading means for the top roll
comprising a spring and a rocker device oper
ative to transmit the spring pressure to the mov
able bearings of the top roll.
6. In combination with a tack and nail machine
20 having cutting and forming tools and means for
actuating them, an oscillatory barrel for guiding
tack strip to the cutters, strip-feeding means
carried by the barrel and means for oscillating
the barrel, the strip-feeding means comprising a
25 pair of rolls, one at least of said rolls being mount
ed in movable bearings whereby such roll is per
mitted to move bodily toward and from the other
roll, a T-shaped rocker so arranged that the ends
of its crossbar bear upon the respective bearings
30 of the removable roll while the end of its stem
rests upon a ?xed support, and a loading spring
bearing upon the stem of the rocker at a point
between its free end and the crossbar.
'7. In combination with a tack and nail machine
35 having cutting and forming tools and means for
actuating them, an oscillatory barrel for guid
ing tack strip to the cutters, strip-feeding means
carried by the barrel and means for oscillating
the barrel, the strip-feeding means comprising
40 a pair of rolls between which the strip passes on its
way to the cutters, the top roll at least being
mounted in movable bearings whereby it may
move bodily toward and from the other roll, and
loading means for the top roll comprising a T
45 shaped rocker so arranged that end portions of
its crossbar rest upon the respective movable
bearings, the free end of the stem member of the
rocker being rounded and resting upon a ?xed
support, the stem of the rocker being longitudi
50 nally slotted, and a loading element comprising
a spring and a pin which is encircled by the
spring and which passes through the slot in the
stem member of the rocker, thereby permitting
the rocker to be adjusted longitudinally with
55 respect to the loading means.
8. In combination with a tack and nail ma
chine having cutting and forming tools and
means for actuating them, an oscillatory barrel
for guiding tack strip to the cutters, strip-feed
60 ing means carried by the barrel and means for
oscillating the barrel, the strip-feeding means
comprising a pair of driven rolls between which
the strip passes on its way to the cutters, one of _
said rolls having a substantially ?at peripheral
65 strip-contacting face and the other roll having a
peripheral face of V-section providing a narrow
edge for contacting with the strip.
9. In combination with a tack and nail ma
chine having cutting and forming tools and
70 means for actuating them, an oscillatory barrel
for guiding tack strip to the cutters, strip-feeding
means carried by the barrel and means for oscil
lating the barrel, a nose piece secured to the de
livery end of the barrel, said nose piece being so
75 attached to the barrel as to permit it to be
swung transversely of the barrel in planes sub
stantially at right angles to each other.
10. In combination with a tack and nail ma
chine having cutting and forming tools and
means for actuating them, an oscillatory barrel
for guiding tack strip to the cutters, strip-reed
ing means carried by the barrel and means for
oscillating the barrel, a nose piece secured to the
delivery end of the barrel, said nose piece com
prising an elongate plate forming a support 10
for the tack strip, and means operative to hold
the strip substantially in contact with the plate
as it moves along the latter, the plate having
an integral bridge member adjacent to its deliv
ery end, said bridge member having an elongate 15
slot for con?ning and guiding the tack strip.
11. In combination with a tack and nail ma
chine having cutting and forming tools and means
for actuating them, an oscillatory barrel for guid
ing tack strip to the cutters, strip-feeding means 20
carried by the barrel and means for oscillating
the barrel, a nose piece secured to the delivery
end of the barrel, said nose piece comprising an
elongate plate forming a support for the tack
strip, said plate having a ?xed longitudinally
slotted strip~guiding element adjacent to its end,
and a resilient hold-down element operative to
hold the tack strip substantially in contact with
the plate as it moves along the latter, said hold
down strip being constructed and arranged for 30
swinging movement laterally out of operative
position to facilitate the introduction of a fresh
strip into the nose piece.
12. In combination with a tack and nail ma
chine having cutting and forming tools and 35
means for actuating them, an oscillatory barrel
for guiding tack strip to the cutters, strip-feeding
means carried by the barrel and means for oscil
lating the barrel, a nose piece secured to the de
livery end of the barrel, said nose piece compris
ing an elongate plate forming a support for the
tack strip, a leaf spring pivotally secured near
one edge of the plate and normally extending
diagonally across the plate and overlying the
tack strip to hold the latter substantially in con 45
tact with the plate, said spring being movable at
Will about its pivotal support to expose the strip
to view.
13. In combination with a tack and nail ma
chine having cutting and forming tools and 60
means for actuating them, an oscillatory barrel
for guiding tack strip to the cutters, strip-feeding
means carried by the barrel and means for oscil
lating the barrel, a nose piece secured to. the de
livery end of the barrel, said nose piece compris 55
ing an elongate plate forming a support for the
tack strip, said plate having apertures along the
path of the strip to facilitate the discharge of lime
from the nose piece, and an integral longitudi
nally slotted bridge member at its end operative 60
to guide and con?ne the tack strip.
14. In combination with a tack and nail ma
chine having cutters and forming tools, and
means for actuating them, an oscillatory barrel
for guiding tack strip on its way to the cutters, 65
strip-feeding means carried by the barrel, and
means for oscillating the barrel, a weighted lever
normally tending to swing to upright position,
and a feeler arm carried by the lever and nor
mally engaging the tack strip on its way to the 70
receiving end of the barrel thereby to hold the
lever substantially horizontal so long as tack
strip continues to enter the barrel.
EDWARD C. BAKER.
DELB-ERT W. MANSON.
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