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Патент USA US3053217

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Sept. 11, 1962
Filed Oct. 1. 1959
4 Sheets-Sheet 1
Sept. 11, 1962
Filed Oct. 1, 1959
4 Sheets-Sheet 2
$040,410” 401 £2
%41.0/ @Mszm
Sept. 11, 1962
Filed Oct. 1, 1959
4 Sheets-Sheet 3
$4.4 a/ra/r x0152
Sept. 11, 1962
Filed Oct. 1, 1959
4 Sheets-Sheet 4
In £2
United States Patent 0 "
Patented Sept. 11, 1962
forming a part of drive shaft 14. Pitman 33 is oscillated
Solomon Adier, Kew Gardens, N.Y., assignor to Nippon
Sewing Machine Mfg. Co., Ltd, Nagoya, .Fapan, a
corporation of Japan
Filed Oct. 1, 1959, Ser. No. 843,852
9 Claims. (Cl. 112-158)
by means of an eccentric 35 carried by shaft 14 and con
veniently engages that eccentric by being provided with
a forked upper portion 36 between the arms of which
the eccentric rides. Pitman 33 is pivotally supported as
at 37 by a suitable portion of the housing.
The head 13 of the machine in a conventional man
ner carries a spring-in?uenced presser bar 38 supporting
at its lower end a presser foot 39 which lies adjacent
This invention relates to a structurally and functionally
improved sewing machine by means of which ornament-at 1O feed dog 26 and the needle carried by bar 19. Beyond
this, the mechanism may include a lever 40 extending
and novel stitch patterns may be produced by relatively
outwardly from the housing of the machine and by means
unskilled operators.
of which, in well-known manner, the stitch length and
It is a primary object of this invention to furnish such
the direction of the feed of the material, as controlled
a machine involving a novel and simple mechanism capa
ble of ready and speedy production and which will op 15 by the dog 26, are regulated. Also, there may extend
beyond the housing of the machine a control or knob 41,
in addition to a pattern knob or control 412. The former
serves to permit regulation of the bight. The latter con
erate over long periods of time with freedom from all
Among further objects of the invention are the com
bining of a mechanism of this type with the needle bar
of a sewing machine in order to impart predetermined 20
movements to the latter such that a zigzag stitch will be
trols the stitch pattern as produced by the machine in
accordance with the present teachings.
In FIG. 4 various ‘detailed structures have been omitted.
produced, and the combining of that mechanism with
All of them may be more or less conventional and are
well understood by those conversant with the art and
the structures necessary in a sewing machine of the zig
riety of ornamental stitches Will be available to the user
of the mechanism.
25 zag type. They will include proper bearings for shaft
the feed dog control of the machine so that a great va
With these and other objects in mind, reference is had
to the attached sheets of the drawings illustrating prac—
tical embodiments of the invention and in which:
FIG. 1 is a fragmentary perspective View of a pre
ferred form of control mechanism;
FIG. 2 is a sectional front view of that mechanism;
FIG. 3 is a perspective view of a pair of components
included within the assembly as shown in FIGS. 1 and 2;
FIG. 4 is a perspective view of the mechanism which
may be present in a sewing machine with the present 35
teachings incorporated therein; and
FIG. 5 is a view similar to FIG. 1 but showing an
14 and suitable couplings between these bearings and the
housing portions of the machine. Similar necessary cou
pling structures will exist between the supports for shafts
22 and 23 and the bed portion of the machine as well
as between the pivot 21 and the head 13. Other struc
tures have been shown but need not be herein described,
in that their design and operation are well understood,
not alone in the case of straight stitch, but also in the
instance of zigzag machines.
The lateral movements of needle bar 19 are controlled
by means of a link 43. This link has one of its ends
pivotally connected as at 44 to the support or carriage
20. It is apparent that as this link is reciprocated, sup‘
port 20 will rock around pivot 21 to thus cause needle
bar 19 to oscillate.
With a view to reciprocating link 43, drive shaft 14
mounts a gear 45. The latter meshes with the teeth of
16} indicate a suitable machine bed from which a column
a gear 46 connected by a suitably supported shaft with
or pedestal extends in an upward direction and is con
an eccentric 47. As in FIG. 1, a member 48 having
tinued in the form of an arm 12 terminating in a head
13. In accordance with conventional practive, there ex 45 its inner face channeled receives within that channel the
eccentric. That member is rockingly supported as at 49
tends through the upper ends of the head and pedestal
and carries in a channel de?ned by ?anges St} a block
portions and throughout the length of the arm a rotatably
51, so that the latter may slide toward and away from
mounted shaft 14. At one end, this shaft convenienlty
the pivot 49. That block is connected to the inner end
has associated with it a wheel 15. Shaft 14- is rotated
by an electric motor or otherwise, and may be driven by 50 of link 43. It is apparent that as shaft 14 rotates, needle
bar 19 will ‘be reciprocated. Also, member 48 will os
a belt (not shown) engaging the pulley portion 16 of
alternative form of mechanism.
Referring primarily to FIG. 4, by way of illustration
of a sewing machine to which the present invention may
be applied, the dot~and-dash lines under the numeral
cillate around its pivotal mounting 4l9 incident to the
action of eccentric 47. With such oscillation, link 43 will
reciprocate to impart lateral movement to carriage or
or link 18 serves to reciprocate a needle bar 1?. The
latter is slidably mounted within a guide 20 pivotally 55 guide 20 and consequently the needle carried by bar 19.
The farther block 51 is shifted away from pivot 49, the
supported as at 21 so that the needle bar in addition to
greater will be the amplitude of reciprocation imparted
straight reciprocation may move laterally.
to link 43. The more block 51 is moved towards pivot
Within the bed 1%) of the machine, rock shafts 22 and
49, the smaller will be the amount of reciprocation.
23 are rotatably supported‘. Shaft 23, by means of a
With the inner end of link 43 in substantial alignment
crank 24-, serves to reciprocate feed bar 25. The latter
with pivot 49, no reciprocation will occur.
is guided in any desired conventional manner and
As in FIG. 1, wherein the mechanism is achieving
connected to a feed dog 26. Shaft 22. by means of
merely lateral movements of the needle bar, the pattern
gearing 27 serves to drive a gear 28‘ ?xed to a loop
dial or control 42 is secured to a shaft 52 supported for
taker 29 to actuate the latter. Also it moves the feed
dog in accordance with usual practice. Shafts 22, and 65 rotation Within the housing. As illustrated, that dial
conveniently carries indicia in the form of a series of
23 are oscillated conveniently by rocking cranks 30 and
symbols representative of the type of stitch which will
31 and connected respectively to pitmans 32 and 33. The
former has its upper end coupled to a crank portion 34:
be produced according to the position assumed by the
wheel 15. Adjacent its opposite end, shaft 14 conven
iently mounts a crank 17 which by means of a pitman
dial. There may also be included in these symbols an
indication of a position assumed by the parts in which
no mechanism will automatically function to produce
fancy or embroidery stitches. A registering mark or
equivalent, as indicated, may serve as a guide with which
the various subdivisions of the dial may be aligned. Se~
cured to shaft 52 are a plurality of elements 53 having
cam or actuating portions 54. As hereinafter brought
rides within a notch 74 formed in a bell crank member 75.
The latter is pivotally supported with respect to the hous
ing of the machine by a shaft indicated at 76. The sec
ond arm of bell crank lever 75 also conveniently ter
mintes in a notch portion 77.
Riding within the latter is
a pin 78 af?xed to the inner end of link 43. It is thus
apparent that as follower 68 is shifted by a given cam
60 of the ‘group or series carried by arms 56, shaft 67
out, these may serve as selectors under the control of
will be rocked to correspondingly move arm 72. This
the operator to permit control of the machine so that a 10 in turn will transmit rocking motion to bell crank lever
desired stitch will be produced.
75 and thus the pin 78 af?xed to link 43. This will cause
To achieve this, a supporting shaft 55 is provided ad
the inner end of the link to be moved towards and away
jacent and parallel to shaft 52. This shaft mounts a
from the pivot 49. As illustrated, shaft 67 may have af
plurality of arms 56 each in permanent alignment with
?xed to it a knob 79 positioned beyond the exterior face of
one of the elements 53. The inner ends of arms 56 ter
' the housing. A detent structure (not shown) may serve
minate in follower portions 57 engageable with the cam or
to retain shaft 67 in a position where follower 68 is
projecting parts 54. The opposite ends of arms 56 serve
by knob 79 above the cams so that the follower is not
to support operating cams. The design providing for this
structure is best illustrated in FIG. 3.
In that view, the numeral 58 designates an aperture
within an arm 56 and through which shaft 55 extends so
as to rockingly support the arm. Opposite the follower
portion 57 the arm provides in its end zone an opening 59.
A cam 69 embodies a suitable con?guration and has ex
tending from it a disk-shaped portion 61 of a diameter
related to the diameter of opening 59. This disk portion
may be either integral with the cam or else suitably af
?xed to the same. Its thickness should preferably be
equal to that of arm 56. As will be apparent, with disk
portion 61 within the aperture 59, the cam will be sup
ported for rotation by the arm 56. Also, the weight of
the assembly thus furnished will assure that the arm 56
under the action of gravity will tend to maintain its fol
lower portion 57 in an elevated position. Cam 60 is
rotated with respect to the arm preferably by forming in
the inner edge of the disk 61 an annular series of gear
teeth 62, thus furnishing a ring gear.
In common with elements 53, the cam and arm assem
effected by them.
Considering the operation of the mechanism so far
described, it is apparent that with the machine properly
threaded and material disposed below the presser foot
39, a rotation of shaft 14 ‘will cause needle bar 19 to bc
reciprocated and the feed dog 26 to shift the material in
the intervals between stitches. Simultaneously with the
formation of these stitches, link 43 may be reciprocated
due to the oscillation of member 48 around its pivot 49
as caused by the eccentric 47.
If desired, a structure
may be furnished for preventing this reciprocation by
simply attaching to the shaft 80, mounting knob 41, an
eccentric 81 which will bear against the edge of link 43;
a spring 82, conveniently associated with the outer arm
of bell crank 75, assuring this contact. Obviously, if
eccentric 81 is shifted to a position such that link 43 has
its inner end lowered to a point where pin 32 is substan
' tially in line with pivot 49, no movement of link 43 will
occur, and straight stitching will result. Under these or
other circumstances, control 40 may be actuated to govern
the operation of rock shaft 22 to vary the length of the
blies 56-60 are disposed adjacent each other. A shaft
stitches or to cause a reverse feeding of the material
63 is supported for rotation by the arm portion 12 of the 40 being operated on.
housing and extends through the openings de?ned by the
Assuming that eccentric 81 does not occupy a position
ring gears 62 of the several cams. Within that area, this
such that link 43 is maintained in stationary condition,
shaft is formed with teeth 64- to provide a pinion portion
and that dial 42 has been shifted to a position at which
common to and meshing with all of the ring gears of the
the portion 54 of a desired selector element 53 is in en
several cams. A worm 65 is mounted by drive shaft 14
gagement with the follower 57 of an arm 56, then the
and engages with a worm wheel 66 ?xed against move
opposite end of that arm will be elevated. With such
ment with respect to shaft 63. Accordingly, as shaft '14
elevation, the corresponding cam will be raised to the
rotates, shaft 63 will be turned, and due to the fact that
zone of follower 68. Such raising will not result in a
its pinion portion drivingly engages the teeth of the cam
disengagement of teeth 64 from the teeth 62 of the selected
elements, the latter will be constantly rotated.
cam or any other cam of the group. Consequently, the
Considering FIG. 2 in conjunction with FIG. 1, it will
relationship of the several cams will be maintained. With
be observed that a ?nel transverse shaft 67 is rotatably
the establishment of the described condition of the parts,
supported by the housing and that a follower 68, prefera
then selected cams 60 will individually rock follower 68.
bly in the form of a rod, is provided which overlies the
This movement will be transmitted by shaft 67 to crank
entire bank of cam assemblies driven by rotation of shaft
72 and thus to the inner end of link 43, which will be
63. This rod is mounted by arms 69 carried by shaft
shifted toward and away from pivot 49.
67. The follower thus provided is urged in the direction
Accordingly, instead of that link being simply recip
of the cam peripheries by securing an arm 70 against
rocated merely in a manner corresponding to the contours
movement with respect to shaft 67 and connecting to
of eccentric 47, a modulation and variation of such shift
that arm one end of a spring 71, the opposite end of
ing will occur ‘as determined, by the cam and rest portions
which is secured to a part ?xed with respect to the hous
of operating unit 60 as superimposed upon the actions
ing. By this structure it is obvious that the follower
and movements created by eccentric 47. Thus, a desired
shifts toward and away from the axis of shaft 63 and is
stitch pattern is produced. As will be appreciated, by
not capable of moving axially of that shaft or shaft 67.
manual adjustment of knob 41, the characteristics of
The cams 60 being ‘maintained against sidewise move 65
this pattern may be altered. In other words, by shift
ments with respect to arms 56 and the latter being main
the inner end of link 43 upwardly, away from the piv
tained by their coupling with shaft 55 against axial move
ot 49, that link will still receive the combined impulses
ments with respect to that shaft, it is apparent that these
and movements transmitted to it by eccentric 47 and the
cams will maintain ?xed stations as they are rotated by
60 which has been selected, but the pattern will have
the turning of shatf 63.
a broader scope. Conversely, by moving the link to
With a view to having the movements of link 43 re
wards pivot 49, the scope of the pattern will be diminished
spond to the driving forces exerted not alone by eccentric
as that link moves downwardly under the in?uence of
47 but also by the operating earns, a coupling structure is
spring 82 or otherwise.
employed. That structure conveniently includes an arm
72 affixed to shaft 67 and carrying a pin 73. This pin 75 The arrangement of apparatus may be modi?ed so
ercised by actuation of knob 41 or its equivalent. These
tionally, in lieu of spring 82, a spring 1419 may be em
ployed which has its free end connected to link 43. This
assures that follower 88 will constantly be urged toward
three controls will involve the cam or eccentric 47 and
a grouping of mechanism such as is shown in FIG. 1
control cam 87.
that the lateral movements of the needle bar are gov
erned by three controls, in addition to any control ex
to modify and amplify the resultant movements of link
43 as afore described. In addition, a substantial dupli
cation of the mechanism as generally shown in FIG. 1
a position at which it engages the periphery of a selected
As will be understood, in connection with a mechanism
of the type shown in FIG. ‘5, a turning of shaft 83 will
serve to lift a selected cam 87 to a position where it co
operates with the follower 88. Therefore, as the mecha
will be present. This ‘duplication will control the posi
tion of the needle, in other Words, the de?nite shifting 10 nism operates, that follower will be rocked to correspond
ingly move the inner end of link 43 in the manner here
and maintaining of the needle bar for desired time in
tofore ‘described, and thus control the lateral movements
tervals in positions at which the needle will stitch along
a given line or else to the left or right of that line. Such
an arrangement of mechanism has been shown in FIG. 5.
of the needle bar so that a pattern will be produced by the
combined action of the selected pattern cam and eccen
In that view, the numeral 42 again indicates a pattern 15 tric 47. ‘Simultaneously with this operation of the mech
anism, follower 93 will be rocked to transmit move
dial. This dial is secured against movement with respect
ments to shaft 67. That shaft, through arm 105, will
to a shaft 83 corresponding to shaft 53 as previously de
control the position of the needle by transmitting move
scribed. =In common with the previous illustration, this
ments to link 43 through pivot 106 and member 48.
shaft mounts a group of lifter selector cams in the form
of elements 84, each formed with projections 85. These 20 Therefore, the resultant pattern will also include factors
as controlled by one of the cams 94. The other parts
will cooperate with pattern cam lifters embracing arms
86 mounted solely for rotation with respect to a shaft 87 '.
The latter corresponds to shaft 55 as previously described.
These arms will also have follower portions to cooperate
with the projections 85 of elements 84 and will mount
earns 87 ‘corresponding to the cam-s 60; one of those
cams 87 being shiftable to an elevated position to co
operate with a follower bar 88 mounted to oscillate shaft
89. That shaft will also carry a crank 98 operatively
coupled to a bell crank 91 in turn connected to link 43
in the same manner as described in connection with FIG.
1. It will be observed that shaft 89 does not extend
across the entire housing. Rather, in FIG. 5, this shaft
of the machine as heretofore described may all be pres
ent, so that a competent operator will be able to produce
simple or involved stitch patterns precisely as desired.
Attention is now again invited to FIG. 4 and especially
to the ‘detailed operating mechanism controlling the func
tioning of the stitch-forming apparatus. ‘It will be pri
marily seen that the mechanism as illustrated in FIG. 5,
involving the needle or bight control and the position con
trolS, ‘has been illustrated. For this purpose, the same
reference numerals as designated the parts in FIG. 5 have
been employed in connection with corresponding parts
terminates substantially midway of that housing. In line
in FIG. 4. In addition, there is shown in FIG. 5 in the
assembly a further group of control cams. These serve
with that shaft is a second shaft 91" which by means of
to govern the operation of the feed dog 26. ‘According.
crank 92 mounts a follower 93 common to a group of
cams 94. rllhose cams correspond to and are preferably
of the same general type as cams 87 and the cams 60 as
stitches or short stitches, together with stitches of inter
mediate lengths. Also, it may serve to feed the material
illustrated in FIG. 3. Also, they are mounted on arms
95 corresponding to the cam lifter arms 86 and 56. Arms
95 are mounted on shaft 87' and have follower portions
96 engageable with projections 97 forming parts of each
of a group of selector elements 98.
Those elements
ly, the latter may, under this control, produce long
being worked on in either a forward or reverse direction.
Thus, in FIG. 4 a third group of lifting selector cams
107 is carried by shaft 83. These cams or elements
cooperate with arms corresponding to arms 56, 86 and
95 in order to selectively raise one of those arms and
the cam 110 carried thereby. A follower 111, preferably
elements 84 and 53. At this time it is to be noted that 45 in the form of a bar, overlies the cams 110‘ of the third
group. As in the prior structure, the follower and cams
in FIG. 5 merely four elements, arms and control cams
are secured against axial movements with respect to each
have been shown in each of the two groups illustrated.
other, and the cams are driven by a pinion shaft 63 or
This has been done with a View to avoiding confusing
its equivalent, that shaft being common to all three
complications of the drawings. As will be understood, a
greater or lesser number of control cams, together with 50 groups of cams and maintaining the timed relationship
of all groups as well as the cams individual to each
the necessary associated mechanism, might be included
group. Follower 111 is supported by arms, one of
in each group; the same being true of the structure here
which, as at 112, is in the form of a bell crank. These
inafter described in connection with FIG. 4.
function as lifter selector cams in the same manner as
In any event, shaft 91’ has connected to it an arm 99.
arms are rockable around the axis of a supporting shaft
This arm, by means of a pin and slot connection 100, 55 113. The second arm of bell crank 112 is pivotally con
nected to one end of a link 114. The opposite end of
serves to rock a bell crank lever 101 around its point of
that link is also pivotally connected to an arm 115
pivotal mounting 102 as shaft 91 oscillates. The second
carried by a shaft 116 rotatably mounted with respect
arm of the bell crank lever is connected conveniently by
to and preferably extending transversely of the machine
latter is secured to a shaft corresponding precisely to
housing, as shown. Shaft 116 also carries an arm 117,
which by means of a rod or link 118 is connected to the
a pin and slot connection 103 with an arm 104.
shaft 67.
This shaft carries an arm or crank 105 to
stitch length and reverse control lever 40. The parts
are normally maintained in a predetermined position
This connection is provided in lieu of the pivot 49 in
where a forward feed of the material being worked upon
FIG. 1. Also, in common with the previously described
structure, the main drive shaft 14, by means of suitable 65 results in a predetermined stitch length being achieved.
which a member 48 is pivotally connected as at 106.
gearing 45 and 46, serves to rotate the eccentric or cam
47 controlling the movements of member 48; a block 51
As will be understood, with a cam 11% of the third
group having been selected and [raised to elevated posi
tion by the proper element 107, shaft ‘63 will cause the
being slidably con?ned for movement longitudinally of
periphery of that cam to traverse follower 111, thereby
member 48 and serving by means of a pin 32 to connect
the inner end of link 43 with the assembly. The outer 70 swinging the latter and rocking bell crank 112, link 114,
end of arm 104 has connected to it the free end of a
shaft 116 and arm 117.
Follower 111 will ‘be main
tained in operative association with the selected control
cam by the tension exerted through spring 119 acting
movement with respect to the casing. This spring assures
back through the linkage through bell crank 112. ‘In
that follower 93 will constantly be urged into engagement
with the periphery of the selected control cam 94. Addi 75 any event, as rod or link 118 is reciprocated through
spring 108, the opposite end of which is secured against
this cooperation of parts, control 40 will be shifted.
Initial shifting will result in the length of the stitches
produced being diminished, in that feed dog 26 will feed
necting structure between the follower of the latter as
sembly and said needle bar for displacing the latter to
either side of such point.
the material at a lesser rate of speed. By moving the
3. In a sewing machine as de?ned in claim 2, a mecha
parts to a further position, feed dog 26 may become Cl nism for feeding material to be stitched past said needle
inoperative to shift the material, incident to the move—
bar, means forming a part of said mechanism for vary
ment occurring on the part of pitman 33. If control
ing the amount of such feed and the direction thereof,
portion 40 is moved beyond this position, then a reverse
a third assembly also forming a part of said machine
feed of the material will occur.
and corresponding to the assembly as de?ned in claim
‘It is preferred that the ratio of drive between gears 10 1 and a connecting structure between the follower of
45 and 46 be such that for each two revolutions of shaft
that third assembly and the feeding mechanism for op
14, eccentric 47 will make one revolution. The ratio
erating the latter.
of drive ‘between worm 63 and worm gear 66 will depend
upon the contouring of the several cams which are driven
4. In a sewing machine as de?ned in claim 2, a shaft
common to both assemblies and said shaft mounting the
by the pinion shaft. On the pattern dial 42 shown in 15 selector cams of both such assemblies.
FIG. 4, various stitches have been illustrated. By way
5. In a sewing machine as de?ned in claim 3, a pinion
of example, the one shown at A is achieved solely by
shaft common to all said assemblies and engaging the
the cams of group 96. The pattern at B follows as a con
ring gears forming a part of the pattern cams thereof.
sequence of the response of the mechanism to selected
6. A sewing machine to produce ornamental stitches
cams of groups 87 and 94. The pattern under C re
including in combination a needle bar, means for support
sults from the control exercised by individual cams of
ing the same for reciprocating and lateral movements,
groups 87. Again, the pattern under D is caused by
drive means operatively connected to such bar for caus
the action of the individual cams in groups 87 and $4,
ing reciprocation of the latter, a rotatable cam shaft,
similarly to the pattern under B. The stitch pattern indi
means operatively connecting said shaft to be rotated by
cated at E results from the combined response of se
said drive means, a plurality of cams supported to rotate
lected cams of groups 94 ‘and 110. A stitch of the type
with said shaft, a single follower common to said cams
indicated at F is ‘achieved by control of the mechanism
and extending parallel to said cam shaft, means securing
by individual cams of groups 87, 94 and 110. The G
said cams and follower against axial movement one with
type stitch results solely from the operation of a cam
respect to the other, means connecting said follower with
of the 87 group, and ‘a stitch as at H is produced by
said needle bar to cause lateral movements of the latter
the operation of a cam of the same group. The dial
in response to movements of said follower, and manually
will also preferably as shown include a suitable symbol
controlled means for selectively disposing said cams and
or legend, which, if adjusted to proper position by ro
follower in positions at which an elected one of said
tation of the dial, will result in no cam of any of the
cams causes movements of said follower, said manually
three groups being lifted to a position at which it co 35 controlled means including a further rotatable shaft, rock
operates with its follower.
of course, under all fore
going conditions the eccentric 47 will produce the basic
ingly mounted arms to cause movements of a cam and
bar with said drive shaft to reciprocate as said shaft ro
tates, movable means connected to said supporting means
for effecting lateral movements of the latter and bar, an
in combination, a movably mounted needle bar, means for
reciprocating said bar, a link connected to said bar for
follower such that they shift relative to each other to
reciprocation of link 43. Also under all these condi
cause the surface of the cam to operatively engage the
tions, knob 4-1 may be adjusted to further modify the
follower, means carried by said further shaft and con
characteristics of the resultant stitch.
nected with said arms for causing such shifting, said
Thus, among others, the several objects of the inven
arms being connected one to each of said cams, the latter
tion as speci?cally aforenoted are achieved. Obviously,
being each formed with an opening of a diameter greater
numerous changes in construction and rearrangements
than that of said cam shaft and said cam shaft extending
of the parts may be resorted to without departing from
through and drivingly contacting the edges of said open
the spirit of the invention as de?ned by the claims.
ings to cause rotation‘ of said cams.
I claim:
7. In a sewing machine as de?ned in claim 6, said cam
1. A sewing machine to produce ornamental stitches
shaft being formed with axially extending teeth and each
including in combination a frame, a rotatable drive shaft
opening of said cams being formed with a series of in
mounted thereby, a needle bar, means for supporting
wardly extending interengaging teeth de?ning the edges
the bar for both lateral and reciprocating movements
of the openings.
with respect to said frame, means for connecting said 50
8. In a sewing machine to produce ornamental stitches,
operating ‘assembly comprising a plurality of selector
moving the same laterally, a plurality of cams, axially
disposed with respect to each other, means for rotating
earns, a manually rotatable shaft mounting the same and 55 said cams, supporting means to prevent axial movements
supported by said frame, arms mounted by said frame
of said cams, means operatively connected to said cams
to be engaged by said cams and rocked thereby, aper
and bar reciprocating means for rotating said cams in
tured pattern cams rotatably supported one by each of
timed relationship to the reciprocations of said bar, a
said arms, ring gears de?ning the edges of such aper
single follower extending across said cams, means sup
tures, a pinion shaft connected to be rotated by said 60 porting said follower solely for movements toward and
drive shaft and extending through the ‘apertures of said
away from the cams, selective engaging means connect
pattern cams in engagement with the gears to thereby
ing said follower solely with one of said cams, said se
rotate such pattern cams, a single elongated and movable
lective engaging means comprising a manually rotatable
follower disposed adjacent said pattern cams and moved
shaft, selector cams secured to said shaft, rockingly
by the latter as ‘an arm mounting a pattern cam is rocked 65 mounted arms each rotatably supporting one of said ?rst
to shift that cam into operating engagement with said
named cams, and follower portions forming parts of said
follower and a connecting structure between and trans
arms to be engaged by said selector cams and thus rock
mitting movements of the follower to the supporting
means of the needle bar to impart to the latter ‘lateral
an arm to move its supported cam into cooperating en
gagement with said follower.
70 9. In a sewing machine to produce ornamental stitches,
2. In a sewing machine as de?ned in claim 1, a mecha
in combination, a movably mounted needle bar, means
nism forming a part thereof ‘for displacing the stitching
for reciprocating said bar, a link connected to said bar
zone of the bar to one and the other side of a given
for moving the same laterally, a plurality of cams, axially
point, a second operating assembly as de?ned in claim
disposed with respect to each other, means for rotating
1 forming a Part of said machine and a second con 75 said cams, supporting means to prevent axial movements
of said cams, means operatively connected to said cams
and bar reciprocating means for rotating said cams in
References Cited in the ?le of this patent
timed relationship to the reciplrocations of said bar, a
single follower extending across said cams, means sup-
H111, ------------- ‘~'*“" July 23’ 192w
away from
said the
and 5
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;’ 1959
solely with one of said cams, the means for rotating said
Como “T """""""" " 6p '
. .
cams comprising a rotatable pinion shaft operatlvely con
nected for movement with said bar as it reciprocates, said
onstantme ___________ __ May 31, 1960
cams being formed with openings of a diameter larger 10
than that of said pinion shaft and gear teeth extending
Italy ________________ __ Feb. 12, 1955
France _______________ __ Feb. 18, 1957
inwardly from said openings and engaged by the teeth
France ______________ __ Sept. 30, 1957
Great Britain __________ __ Apr. 2, 1958
of said pinion shaft.
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