Year: 1888

page_text: I HUBBARD WINSLOW TILTON of Boston in the State of Massachusetts one of the
United States of America and of 55 Chancery Lane in the County of Middlesex,
Gentleman (a communication from abroad by Edwin E. Angell of 34 School Street
Boston aforesaid) 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 :—
The sewing machine herein to be described for basting clothing is especially
designed to make a long stitch to temporarily retain in place while being properly
stitched, the main part of the garment waddings and lining.
The machine made the subject of this invention contains a feeding mechanism
adapted to move the material for a very long stitch, the tension device being such as
to permit the movement of the material for a long stitch, the presser foot a rising
and falling foot having a long toe and heel and being pivoted with relation to the arm
or bar carrying it.
My invention consists in a sewing machine containing mechanism for making a
chain stitch, a feeding mechanism and means to move it for a long stitch, a presser
foot having a long toe and heel and rising and falling with the work during the
operation of the feed, and a tension mechanism to give up the thread for a
long stitch.
Also in the combination in a sewing machine, of a main or needle bar actuating
shaft having a can thereon at its rear end, a substantially upright lever moved by
the said cam, a feed actuating rock shaft extended longitudinally through the machine
and having projecting arms; a feed bar, and a link connecting it to one of the arms
of the rock shaft the other arm of the rock shaft being connected with the said
substantially upright lever by means of a slot and block.
Also in a sewing machine a presser bar surrounded loosely by a lifting plate having
an arm to be acted upon by a cam at the forward end of the needle bar actuating
shaft, and a hook or stop, and a spring whereby the tipping motion of the lifting
plate may become effective sooner or later to bite the presser bar and lift it for a
greater or less distance.

page_text: Also, in a sewing machine the presser bar having a loosely surrounding block, and
connected link and a lever to lift the link, a plate also surrounding the said presser
bar loosely and provided with an arm, and cam to act upon the said arm, and
a spring, and a stop to govern the descent of the said plate and of the presser bar.
Also, in a sewing machine, a feed bar carrier having a series of guides for the
reception of the feed bar and an opening in which is fitted a block, the block having
attached to it a plate, and means to raise and lower the feed bar, and a crank and
rock shaft to move it a variable distance to vary the stitch.
Also, in a sewing machine, a feed regulating lever provided with a cam, and a
tension regulating spring, and means substantially as will be described between the
said tension regulating lever and cam to automatically regulate the tension of the
needle thread as the length of the stitch is varied.
Figure 1 is a front side elevation of a sewing machine embodying this invention, a
part of the frame-work being broken out the Wilcox & Gibbs rotating hook being
omitted from the end of the lower shaft, other parts being in section to better show
the working parts, the presser foot being shown in elevated position.
Figure 1a a detail of the link b².
Figure 2 is a rear side elevation of the machine, the belt receiving wheel being
omitted.
Figure 3 is a front or left hand elevation thereof, the usual rotating hook of the
Wilcox & Gibbs class to be employed to co-operate with the needle being omitted.
Figure 4 is a detail showing in perspective the feed carrier.
Figuro 5 is a rear side elevation of the feed regulating lever and its attached cam
to effect the change of tension.
Figure 6 a top view of the feed bar detached.
Figure 7 a detail shewing one of the levers separated from the machine, and
Figure 8 is a separate view of the parts of the dog to lift the presser-bar.
Referring to the drawings, A represents the bed-plate, and A¹ the overhanging
arm, all of usual shape, the forward end of the said arm being forked and provided
with suitable bearings for the needle bar a, the shank of the presser-bar, and a
guide-rod t.
The needle-bar has attached to it an eye-pointed needle a'. The main rotating
shaft A2, supported in usual bearings in the overhanging arm, is provided at its rear
end with a balance or belt wheel A³, the hub of which is scored for the reception of
the usual driving belt or band A', the said shaft also carrying the fly-wheel and a
cam-disc B grooved at its face, as at 6', see dotted lines Figure 2.
This groove receives in it the shoe 2, pivoted loosely upon a stud b³, connected
to the upper end of the lever, see Figure 7, having its fulcrum at 6, scc Figure 2,
the lower end of the said lever below the said fulcrum being grooved, see also
Figure 7, for the reception of a block 10 connected loosely with a pin 3, carried by
the lower end of the link 67 jointed at to the outer end of the stitch-regulating
lever C pivoted at C, the handle of the said lever being within easy reach of the
right hand of the operator.
The pin 3 has at its other end a loose block 4, which enters a groove in an arm (2.
the lower end of which is attached by a screw 6 to the rock-shaft C³, having its
bearings in lugs or ears at the underside of the bed-plate, the said rock-shaft, at its
forward end, having secured to it the arm C, which, by a link Cx, is attached to the
depending log C rigidly attached to the rear end of the feed dog C, shown separately
in Figure 6, the said rock-shaft and link effecting the forward and backward
movement of the feed-dog, and consequently governing the length of the stitch, the
stitch being made longer or shorter by turning the lever C upon its fulcrum, the
movement of the lever in the direction of the arrow thereon, Figure 2, shortening
the feed.
The hole in the lower end of the link 6', see Figure 1", for the reception of the
pin 3, is of enough greater diameter than the said pin to prevent the movement of
the lever C while the lever is being moved to vibrate the arm and rock-shaft C³
to effect the feed.

page_text: In Figure 2 the machine is set for its longest stitch. The block 4, see Figure 1, is
entered by the shank of a thumb-screw 10 inserted through a slot of the arm C and
also through a leather or other friction-plate or device 12 the said screw by its action
upon the washer, producing sufficient friction to keep the lever C and the parts
for varying the length of the feed in the position in which they have been adjusted
by the operator.
The main shaft has attached to it an eccentric c which is surrounded by the upper
end of a link 2 slotted at its central portion to embrace a block D mounted loosely
upon a stud D of the frame-work, the lower end of the said link e' having a screw D³
which enters a sliding block or pin D placed in a radial slot in a disc D' secured
to the hook shaft D, supported in suitable bearings D', D³, at the lower side of the
frame-work.
The said hook-shaft at its forward end will in practice have a hook, substantially
the same in construction and operation as the hook used in the Wilcox & Gibbs
sewing machine, to make with the needle thread a chain stitch, the said shaft at the
rear of the said hook being provided with a cam or eccentric d¹ which is employed
to raise and lower the feed-bar at the proper times to engage and release the cloth.
The bearing D has a hanger. D°, see Figure 1, the front face of which is planed or
made smooth to receive against it the foot e of the feed-bar carrier E, shown
separately in Figure 4, the open slot e¹ in the said feed-bar carrier being entered by
a block e³, which is connected to the hanger D by screws 13, the said screws being
first inserted through holes in a plate e³, which, being of greater size than the
block e, acts against the foot e of the feed-bar carrier, making an outer guide for it.
The hanger D' has attached to its underside by screws 144 a plate f provided with
two holes for the reception loosely of two studs 14, which as herein shown, are screwed
into the lower end of the foot e, the said studs below the plate fand between the
said plate and their heads, receiving upon them spiral springs f, the said springs
acting normally to keep the cross-bar e of the feed-dog carrier E in contact with
the eccentric attached to the hook-shaft, the said feed-dog carrier being raised
vertically by the said eccentric just before or as the toothed surface of the feed-bar C
is to rise through the slotted-plate 17, to engage and feed the material for a stitch.
The feed-bar carrier E has a backwardly extended arm e having a guide e, the
main part of the said carrier having two other guides e, es, which receive and guide
the feed-bar in its reciprocations.
In Figure 4 the guide e8 is omitted from the feed-bar carrier in order to better
show the cross-bar e, and the slot in which works the eccentric d', attached to the
hook-shaft, the said eccentric operating to raise the carrier and feed-bar.
The shaft A³, at its forward end, has attached to it the disc G, and just back of it a
cam G¹, the latter operating at each rotation upon an arm G2 of a lifting plate.
or dog G³, shown separately in Figure 8, the said plate having two holes 18, 19, and
a slot 20, the hole 18 receiving loosely the prosser-foot bar b, the needle-bar a
passing freely through the hole 19 of considerably greater area, while the slot 20
embraces the guide-rod t having a pin 22.
The plate G³ is acted upon at its upper side by a spiral spring 24 placed between
it and the upper bearing AB, throngh which moves the presser shank b, the said
spring normally acting to keep the lower side of the said plate against a hook
or stop 26 attached by screws 27 to the head of the machine, that end of the plate G³
surrounding the guide-rod t resting normally against the pin 22 therein.
The presser-bar b, below the lifting plate G is surrounded loosely by a block 614,
the said block having connected to it by a screw 28 the link 29 which is extended
upwardly above the head of the machine where it has attached to it by screw 30
a cam lever 31, which may if desired be turned to act upon the bearing A" of the
machine and lift the said block, and with it the plate G³, so that the arm G³ thereof
will not be struck by the cam G¹ in its rotation.
When the plate G is left under the control of the spring 24 and permitted to rest on
the hook 26 and pin 22 then, during each rotation of the shaft A2, the cam G¹ thereon
will act upon the arm G' of and lift one end of the said plate while its other end is.

page_text: held down by the spring 24, so that the edges of the hole 18 in the said plate
will bite the presser-bar shank b, and thereafter during the remainder of the time that
the said plate is being acted upon by the cam G₁, the presser-bar will be lifted
and with it its attached devices, but as the said cam passes out from under the said
plate, the spring 24 throws it down against the said hook 26 and pin 22 leaving the
plate G in condition to be again elevated to act as a dog to lift the presser-bar.
The presser-foot g herein shown as a long foot having a long toe and heel
is attached by a screw g' to the lower end of a foot-carrying lever g, pivoted by a
screw 33 to the presser-foot shank b, the said lever g' having a slot g³ to receive a
screw 9, which is screwed into a block g attached, by a suitable screw, to the lower
end of the presser-bar shank 6, the said shank being surrounded above the said block
by a spiral spring 98, which normally acts to keep the said foot down upon the
work.
The screw 9 may be turned in so tight as to prevent the movement of the lever g³
upon its fulcrum, the screw 33, or if the said lever is left loose, the foot g will be free
to move backward with the material as it is acted upon at its lower side by the
teeth 16 of the feed-bar C, the said lever being preferably left free so that the
foot may be moved backward with the material when a very long stitch is being
made, the presser-foot at such times being lifted as soon as the material has been
moved far enough for a stitch, so that when elevated above the material, the spring 34
attached to a block 35 secured to and rising and falling with the presser-bar band
acting upon a pin 36 of the said lever g', throws the same forward or toward the
operator, preparatory to the descent of the foot upon the material and the rising
of the feed-bar C to grasp the material and move it in the formation of a new
stitch.
•
It will be observed that the presser-foot bar is free to descend upon the material,
whatever may be its thickness and is always lifted from the surface of the material
sufficiently to permit the cloth to be released from the presser-foot.
The presser-foot is raised while the feed bar is moving backward and the needle is
rising.
I wish it to be expressly understood that in some instances and for some classes of
work I shall omit the plate G³, or so elevate and hold it elevated that the cam G₁
in its rotation can not strike the arm G' of the plate to move it to bite the shank band
lift it.
The hub of the lever C has a cam 37 shown in Figure 5, against which rests the
foot 38 attached to the vertical rod 39 extended through the lugs 40, 41, the said
foot being normally held down against the said cam by means of a spring 42. The
upper end of this rod has secured loosely upon it a tension regulating block 43 which
is made vertically adjustable thereon by means of a thumb nut 44 which engages
a screw-thread at the upper end of the said rod. The rotation of the rod 39 is
prevented by the splines which enters a slot in the lug 41, see Figure 1.
The tension-regulating lever H is pivoted upon a block in a stand H¹ erected upon
the overhanging arm.
The front end of this lever has pivoted upon it a clamping plate ŉ which bears
upon the thread passing from a suitable spool between it and the plate or rest h¹.
The rear end of the tension-regulating lever is extended backward over and attached
to the block 43 by a screw so that the said lever is compelled to follow the block 43
and rod 39 as they are moved by or through the feed regulating lever C.
When the outer end of the lever C is elevated to make the longer stitch, the cam 37
presents to the foot its smallest radius, permitting the rod and block to descend and
reduce the tension of the lever H on the thread to the minimum, the depression
of the said lever in the direction of the arrow Figure 2, to shorten the stitch, causing
the cam 37 acting upon the foot to gradually raise the rod and increase the tension
upon the material.
To secure the proper maximum and minimum tension for different classes of goods,
the nut 44 may be turned upon the rod to elevate or depress the block 43 as the case
may be.

page_text: The disc G at its front side, has a suitable crank pin which enters a slide-piece
herein shown as a short rod, which enters a hole in the cross-head m attached by
screw m¹, see Figure 3, to the needle-bar a, the rotation of the disc G effecting the
reciprocation of the needle-bar in usual manner.
The presser-bar shank has connected to it by a screw a block t¹ which has two
holes or openings, one of which serves for the passage of the needle bar, while the
other receives in it the guide-rod t which is fastened to the head of the machine
by the screws t, the said block in connection with the guide-rod t ensuring accuracy
of movement of the presser-bar b.
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 sewing machine, mechanism substantially as described for making a chain
stitch, a feeding mechanism and means to move it for a long stitch, a presser-foot
having a long toe and heel and rising and falling with the work during the operation
of the feed, and a tension mechanism to give up the thread for a long stitch,
substantially as described.
2. The combination in a sewing machine, of a main or needle bar actuating shaft
having a cam thereon at its rear end, a substantially upright lever moved by the said
cam, a feed actuating rock-shaft extended longitudinally through the machine and
having projecting arms; a feed-bar, and a link connecting it to one
the arms
of the rock-shaft, the other arm of the rock-shaft being connected with the said
substantially upright lever by means of a slot and block, substantially as described.
3. In a sewing machine, a presser-bar surrounded loosely by a lifting-plate having
an arm to be acted upon by a cam at the forward end of the needle-bar actuating
shaft, and a hook or stop, and a spring whereby the tipping motion of the lifting-
plate may become effective sooner or later to bite the presser-bar and lift it for a
greater or less distance, substantially as described.
4. In a sewing machine, the presser-bar having a loosely surrounding block, and
connected link and a lever to lift the link, a plate also surrounding the said presser-bar
loosely and provided with an arm, and cam to act upon the said arm, and a spring,
and a stop to govern the descent of the said plate and of the presser-bar, substantially
as described.
5. In a sewing machine, a feed-bar carrier having a series of guides for the
reception of the feed-bar and an opening in which is fitted a block, the block having
attached to it a plate, and means to raise and lower the feed-bar and a crank and
rock-shaft to move it a variable distance to vary the stitch, substantially as
described.
6. In a sewing machine, a feed regulating lover provided with a cam, and a tension
regulating spring, and means substantially as described between the said tension
regulating lever and cam to automatically regulate the tension of the needle thread as
the length of the stitch is varied.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London,
Agents for the Applicant.