imрrоvешения и воде вewing шасіцер.
Year: 1897

page_text: imрrоvешения и воде вewing шасіцер.
A communication by THE INTERNATIONAL GOODYEAR SHOE MACHINERY COMPANY,
of 48 Summer Street, Boston, State of Massachusetts, United States of
America.
I ALFRED GEORGE BROOKES of 55 and 56 Chancery Lane, in the County of
London, Chartered Patent Agent 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 present invention as embodied in the mechanism herein described is intended
as an improvement upon the machines shown and described in the Specification of
Letters Patent No. 7793 granted to the said Alfred George Brookes and dated
April 26th, 1892 for Improvements in means or apparatus employed sewing and
has for its object to prevent irregularity in feeding, and thereby to produce a seam
of a more even and finished appearance and of greater strength and durability.
In said patented machine the shoe is held between a stationary work table and a
movable presser foot, arranged to bear upon the sole with a yielding pressure,.
but capable of being locked in the required position to co-operate with the work
table to firmly hold the sole from motion in the direction of the feed. It is evident
that when the presser foot is locked as above stated work cannot conveniently be
adjusted upon the machine and the operation of the feed mechanism is impeded,
for the above reasons in said patented machine mechanism has been provided
whereby the presser foot is automatically released twice during every operation of
the stitch forming devices, first, when the stitch forming parts have just completed
the stitch forming operation and are in proper position for the removal or adjust-
ment of the work, and second, when the awl is in the material and the feeding
operation is occuring.
The above described arrangement has been found to be objectionable in that when
the presser foot is first released as above stated neither the awl or the needle are in
the material and the machine has no control of the work, which is liable to be
moved by the operator in the direction of the feed resulting in an uneven seam or
causing the machine to break thread.
In the present invention the presser foot when locked is automatically released
only when the awl is in the material during the operation of the feed, and
mechanism is provided whereby the presser foot may be released at the will of the
operator for the adjustment of a shoe upon the machine. By the arrangement
above noted the machine at all times retains control of the shoe, which is not
liable to be moved in the direction of the feed except by the operation of the feed
which insures an even' and consequently strong and durable seam.
The present invention is illustrated in the accompanying drawings in which,
Figure 1 is a side view, partially in section, of a sole sewing machine constructed
substantially in accordance with said Letters Patent and provided with attachments
embodying the present invention, and.
Figure 2 is a detached view in side elevation, of said attachments.
Similar letters of reference refer to similar parts throughout the several
views.
In the drawings A represents a frame of suitable shane to support the working

page_text: parts of the machine. d represents the work table which as shown is stationary
and projected from a suitable bracket or rigid projection A³ of the frame A.
represents the presser foot which is carried by an elbow shaped lever e¹
which is loosely mounted upon a stud e upon the rigid projection A³ of the frame A.
At its rear end the lever e¹ has jointed to it a link e, which is extended loosely
through a lug e, upon the arm e, also mounted loosely upon the stud e, or a
suitable boss upon the lever e¹, the link e³ above the said lug receiving upon it
a washer e6, acted upon by a coiled spring e7, adjustable as to its force by a nut e
screwed upon a threaded part of the link e³. The rear end of the arm e is pro-
vided with a ratchet toothed dog e³, which is engaged at times by one or more
pawls elo, said pawls being pivotted upon a lever el, having its fulcrum on a
stude. The inner end of the lever e¹ is also provided with a ratchet toothed
dog e¹6, which is engaged by a pawl el, mounted foosely upon a stud e¹8, connected
with the rigid projection A³ of the frame A, the said pawl having a rearward
extension e¹ against which the end 189 of the lever e¹ is depressed to trip the 1
pawl e A stud 89 is provided, supported from the projection A³ of the frame A,
which trips the pawl elo upon the depression of the lever e¹. f represents a
vertically reciprocating frame pivotted at f¹ to the lever e¹ and controlled by a
suitably placed spring n. In connection with the description of the form and
arrangement of parts heretofore given it is to be noted that, with the exception of 2
the transfer of the stud e from the standard B, which supports the awl and is movable,
to a fixed portion A3 of the frame A, the form and arrangement of parts may be
and conveniently is similar to that of similar parts as shown and fully described
in said Letters Patent. I would further say that the change in the manner of support-
ing the stud e and lever el as above noted forms no part of the present invention, a
substantially similar arrangement being found in the machine known to the trade
as the "
Goodyear Rapid Stitcher" which embodies the devices herein before
described arranged substantially as shown in the drawings.
In said patented machine the pawls elo and e17 are normally held in engagement
with their respective dogs e⁹ and e¹ by suitably placed springs secured to the
lever e¹, and a cam groove is provided upon a suitably placed cam disk, which
engages a cam roll upon the lever e¹ and acts to raise and depress the lever e¹³.
The depression of the lever e¹ acts to disengage both pawls elo and e¹ which allows
the arm e to fall toward the arms e¹ and during such disengagement the presser
foot is held with a yielding pressure upon the work by the action of spring nº,
a hand levere being provided by means of which the presser foot may be raised
for the adjustment or removal of a shoe, against the action of the spring nº. When
the lever e¹ is raised by the action of the cam groove the pawl el⁰ engaging its
dog raises the arm a³, which by means of the spring supporting link e raises
the lever e¹ and causes the presser foot e³ to bear more firmly (with a yielding
pressure) upon the work, and the pawl el engaging with the dog ele in its raised
position locks the presser foot e² in its position of increased pressure as above stated.
The cam groove hereinbefore referred to as provided in said patented machine
is so formed and timed that the lever e¹ is depressed to release the presser foot
twice during every operation of the stitch forming mechanism; first, when the
parts are in position for the removal. or adjustment of a shoe, and second, when
the awl is in the material and the work is being acted upon by the feed.
In form of the present invention shown in the drawings the pawl e¹0 is held
in engagement with its dog by means of a spring e, secured to the lever e¹²,
substantially as shown in said Letters Patent, but to engage the pawl e" with the
dog e¹ I have provided a spring y which bears upon the rearwardly extending
projection e⁹ of the pawl e", and against a fixed portion a' of the frame A.
To release the presser foot while the shoe is being moved by the feed mechanism,
and to lock the presser foot in its position of increased pressure after the lateral
movement of the awl, and while the awl is in the material, I have provided upon
the lever e¹ a cam roll e, which engages with a cam groove Z upon the cam
disk C, mounted upon the shaft A', which is the main shaft of the machine. The

page_text: cam groove Z is so formed and timed with reference to the operation of the feed
awl and other parts of the machine that it depresses the lever e¹, to disengage
the pawls e and e" and release the presser foot e, when the awl has entered the
material for the feed, and, after the work has been fed along for the stitch and
before the awl has left the material, raises the lever e¹ into position to bring the
presser foot into its position of increased pressure as before described, and holds
the lever e in substantially the last described position until the awl has again
entered the material to feed the work for the next stitch.
The above described arrangement is such that the presser foot is locked in its
position of increased pressure continuously except when the awl is in the material,
and to provide for the adjustment of new work upon the machine I have provided
a device whereby the presser foot may be released at the will of the operator for
the adjustment or removal of work, which device in the form of my invention
shown in the drawings consists of the following;-
On the stud e is loosely mounted a hand lever a, which is projected below the
stude and connected by a link X¹ with the rearwardly extending projection e¹9
of the pawl e As shown the link X' is pivottally connected at X2 with the lever X,
and is bent downwardly toward its inner end, which is bifurcated and embraces
a pin X3, which is laterally projected from the rearwardly extending projection e¹9
of the pawl e. The lever X is conveniently adjacent to and extending along
the lever e, so that said levers may be conveniently grasped together.
The above described arrangement is such that by a forward motion of the lever X,
a rearward motion is imparted to the link X', which rotates the pawl e about the
stud e, disengaging the pawl e from the dog ele, leaving the rear end of lever e¹
free to be depressed by a rearward motion of the lever e against the tension
of the springs e and no and to raise the presser foot from the table d
to permit the adjustment of a shoe thereon. It is to be noted in con-
nection with the above described arrangement, that, when the pawl e17 is dis-
engaged from the dog e16, the pawl e¹0 is not interfered with, but remains in en-
gagement with the dog holding the arm in its raised position, so that when
the levers e and X are released the springs e² and no act to return the presser
foot to its position of increased pressure. When the presser foot 2 has been
brought into its position of increased pressure, the pawl e, which has been held
in contact with the dog e¹ by the action of the spring y, engages with said dog
to lock the presser foot, and the work is firmly held between the table and the
presser foot.
The awl is shown at a³, but the form and arrangement there- or of of its
actuating mechanism are not essential to the present invention or to its attachment
to said patented machine, have also omitted from this specification a description
of other devices shown in the drawing for the reason that the same are well known
in the art, and will be readily understood by a person of average skill therein.
The operation of the present invention has been fully described in connection
with the description heretofore given of the form and arrangement of the several
parts, I however wish to add that I do not consider the same limited to the specific
mechanism herein described or to its application to said patented machine for
it is evident that, with slight modifications involving no departure therefrom,
the present invention may be applied to other machines of the same or an analogous
class.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
1. In a sole sewing machine, the combination with a work support, of a movable
presser foot, means to force said presser foot against the work on the work support
with a normally light pressure, means to increase said pressure at intervals, and
to lock said presser foot when the pressure has been increased, and means under

page_text: the control of the operator to unlock said presser foot, while the increased pressure
is maintained, substantially as described.
2. In a sole sewing machine, the combination with a work support, of a movable
presser, a spring acting with a normally light tension to force the presser foot
against the work on the work support, means to increase the tension of the spring
at intervals, and to lock the presser when the tension of the spring has been in-
creased and means under the control of the operator to unlock said presser foot
while the increased tension of said spring is maintained, substantially as described.
Dated the Sth day of June 1897.
WM. BROOKES & SON,
55 and 56 Chancery Lane, London, Agents for the Applicant.