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Патент USA US2130446

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Sept. 20, 1938.
W. RAKOV
2,130,446
GAUGE ATTACHMENT FOR SEWING MACHINES
Filed NOV. 3, 1937
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BY
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V.
I
M&M
ATTORNEYS
Patented Sept. 20, 1938
2,130,446 '
ATENT OFFICE
NlTED ST'E‘ES
2,130,446
GAUGE ATTACHMENT FOR SEWING
MACHINES
William Rakov, Syracuse, N. Y.
Application November 3, 1937, Serial No. 172,584
4 Claims. (Cl. 112—151)
This invention relates to improvements in a
gauge attachment for sewing machines and per
tains more particularly to a gauge adapted to be
releasably and adjustably secured to the presser
5 foot of a sewing machine for determining the line
of stitches with respect to the edge of the work or
material being stitched.
The main object of the invention is to provide
a gauge, which is simple, durable, and econom
ical in construction, adapted to be removably at
tached to the presser foot of a sewing machine.
A further object is to provide simple and effi
cient means for releasably and adjustably se
curing the gauge to the presser foot whereby said
15 gauge may be quickly and easily adjusted with
respect to the presser foot to bring the same into
different predetermined spaced relationships with
said presser foot and the needle associated there
with.
20
In carrying out the above mentioned objects
I have provided a gauge comprising a supporting
bar, a gauge ?nger, and a. spring secured to the
bar and releasably engaging said ?nger for main
taining the ?nger on the bar. The gauge ?nger
25 is arranged to extend substantially normal from
the bar and to have limited movement toward and
from said bar to compensate for pieces of work
or" different thicknesses, whereby a line of stitch
ing may be produced in such work without man
30 ually adjusting the gauge ?nger with respect to
the supporting bar to compensate for said varia
tions in the thicknesses of the work. Further
more the gauge ?nger is provided in a limited
swinging movement relative to the supporting
35 bar to compensate for any slight variation in
the position of the bar with respect to the hori
.
zontal.
Other objects and advantages pertaining to the
detail structure of the device and to the form
40 and relation of the parts thereof will more readily
appear from the following description taken in
conjunction with the accompanying drawing, in
which:
'
Figure l is a perspective view of a presser foot
with with my novel gauge attachment mounted
thereon.
'
Figure 2 is a perspective view of the presser
foot shown in Figure l with the gauge attach
50 nient removed therefrom.
Figure 3 is a perspective view of the gauge
attachment.
'
Figure 4 is a detail vertical central sectional
View taken through the presser foot substantially
55 on line ll-Jl, Figure 1.
Figure 5 is a vertical sectional View taken sub
stantially on line 5—5, Figure 1.
Figure 6 is a detail horizontal sectional view
taken on line 6——6, Figure 5.
Figure '7 is a detail horizontal sectional view 5
taken substantially on line 1-1, Figure 5.
Figure 8 is a transverse vertical sectional view
taken on line 8—8, Figure 6.
Referring now to the details of the structure
pa
shown in the drawing, the numeral It] indicates 0
the presser foot of the sewing machine construct
ed in accordance with this invention and which
may be attached to the usual presser bar II of
the sewing machine in any suitable manner as
by a screw, not shown. This screw usually ex- 15
tends through a vertically disposed slot l2 formed
in the upper end portion of the shank I3 of the
presser foot at one side thereof into screw
threaded engagement with the presser bar II.
The presser foot ill is of usual construction with 20
the exception that it is provided with a vertically
disposed recess l5 formed in the lower portion of
the shank l3 at the outer side thereof. The
presser foot also has a recess l6 formed. in the
upper face of the horizontal portion M at the 25
inner side thereof adjacent the shank l3 and
which registers with the lower end of the recess
l5. A flat spring H is mounted in the recess I5
with the lower end thereof projecting into the I
recess l8, spring ll being secured in said recess 50
I5 by a rivet 53 extending through aligned holes
provided in the shank l3 and in the upper end
portion of spring ll.
The lower end of spring i1
is provided with a beveled edge I?’ extending
_
across the spring in opposed substantially parallel 3°
relation with the opposite or outer vertical edge
iii of the recess E6. The edge i8 is tapered from
the upper surface of the horizontal portion M
of the presser foot downwardly and outwardly to
form a beveled edge similar to the edge H’ of ‘10
spring H.
The lower end portion of the spring I‘! is adapt
ed to be moved outwardly from the recess l5 to
ward the edge 58 of the recess 16 by means of a
set screw 20 mounted in the adjacent portion of 45
the shank E3. The screw 26 is preferably pro
vided with a knurled head 2! which forms a con
venient ?nger piece by which the screw may be
manually rotated‘ In order that the screw 29
may be maintained in permanent connection with 50
the presser foot the inner or front end of the
screw is upset to provide a laterally disposed
?ange or head 22 which is adapted to register,
when the screw is in its rearmost inoperative
position, in a recess 23 provided in the shank l3 55'
2
2,130,446
adjacent the lower end of the recess l5. The
thickness of the recess l5 and spring I‘! are pref
mounted in the aperture 3| has the opposite side
edges thereof provided with V-shape notches or
erably substantially equal so that when the spring
recesses 37’ as illustrated in Figure 7, and con
forms to the cross sectional contour of the aper
ture 3| to thereby secure the ?nger 3|] to the
is in its normal position, the same is wholly con
tained within said recess with the outer vertical
front side thereof extending substantially ?ush
with the corresponding surface of the shank I3.
The numeral 24 indicates the gauge attach
ment which, as shown, comprises a relatively thin
10 flat supporting bar 25 adapted to be slidably re
ceived in recess Hi. The bar 25 is provided with
a pair of shoulders 26 at opposite sides thereof
intermediate the ends of the bar and which divide
said bar into an outer end or handle portion 25’
15 and an inner end or supporting portion 25".
The longitudinal side edges 21 of the inner end
portion 25” of the bar are tapered from the bot
tom side of the bar upwardly and inwardly to
conform to the beveled edge !8 of the slot l6 and
20 the beveled edge ll’ of the spring H, as indicated
in Figure 4. The width of the inner end portion
25” of the bar is slightly less than the width of
the recess I5 when the spring I‘! is in its normal
inoperative position.
The bar will, therefore,
25 freely slide through the recess when the spring is
in said normal position. Furthermore the bar
may be readily clamped to the presser foot by
rotating the screw 25 in a direction to press the
lower end of the spring I‘! into engagement with
30 the bar.
The inner end portion 25" of the bar 25 is
provided with a graduated scale 29, upon the
upper surface thereof, adapted to align with the
inner vertical edge of the spring |l to enable
351 the operator to easily and properly set the gauge
with respect to the presser foot and to the needle,
not shown, of the sewing machine co-operating
with said presser foot.
Mounted on the supporting bar 25 is a gauge
40, ?nger 3B which in this instance is a relatively
thin plate-iike member having an aperture 3|
formed therein intermediate the ends thereof and
preferably in greater spaced relation to the front
end of the ?nger than to the rear end thereof.
45 The aperture 3| is of considerably greater ver
tical length than the thickness of the bar 25,
While the width of the aperture is substantially
equal to or slightly less than the normal width
of the end portion 25" of said bar.
In order, therefore, that the bar portion 25"
may be mounted in the aperture 3| with the up
per and lower surfaces thereof extending sub
stantially parallel to the upper and lower surfaces
of the aperture, the bar is provided with a pair
of recesses 32 in the outer vertical edges thereof
adjacent the shoulders 257 These recesses 32 are
preferably V-shape and the vertical side walls of
the aperture 3| are correspondingly shaped, as
at 53, to provide a close sliding ?t between the bar
60 25 and the ?nger 35. These recesses and walls
co-act with the shoulders 25 for holding the
gauge ?nger on the bar 25 against movement lon
gitudinally of said bar and at the same time per
mit the ?nger to move vertically with respect to
the bar. The bar 25 is yieldingly maintained at
the upper end of the aperture 3| by means of a
flat spring member 35 mounted on the under side
of the outer end portion 25' of the bar. The
spring has the outer end thereof secured to the
outer end of the bar 25 by rivet 36. The spring
extends forwardly and downwardly from the rivet
35 into the aperture 3| into engagement with
the lower side of said aperture as shown in Fig
ure 5.
75
The front or free end 3l' of the spring 35
spring. The length of the spring 35 from the
rivet 35 to the end 31 thereof, is such that when
said end of the spring is in engagement with the
aperture 3| the finger 35 will be maintained sub
stantially normal to the upper and lower surfaces 10
of the bar 25. The recesses or notches 3'!’ are
so constructed that the outer edge of the end 31
of the spring 35 will be maintained substantially
?ush with the corresponding side surface of the
?nger 35, that is the side of the ?nger adjacent
the presser bar and which engages the edge of
the cloth or work to guide the same during the
stitching operation.
The bar 25 and spring ‘35 may be operatively
connected with the gauge ?nger 3|! in any suitable 20
manner. For instance, if the spring is secured
to the handle portion 25’ of the bar 25, the free
end 37 of the spring is pressed tightly against the
bar 25 and then the end portion 25” of the bar is
inserted into the aperture 3| while maintaining 25
the bar in diagonal relation with respect to the
apei
As the side walls of the aperture reg
ister with the recesses 32 the bar and spring may
be brought into proper interlocked position in the
aperture by rotating the bar and spring relative
to the gauge ?nger.
If on the other hand the spring is not secured
to the bar, the bar may be first connected with
the gauge ?nger 36 in a manner explained above,
after which the end 31 of the spring may be in
serted in said aperture, while in diagonal relation
thereto and then brought into locked relation
with the aperture by rotating said spring with
respect to the gauge ?nger. The spring may then
be secured to the bar by use of the rivet 36 or 40
other suitable means.
It will now be apparent that the gauge can be
used at either side of the presser foot by merely
inserting the bar 25 while holding the same by
the handle portion 25’ into the recess l5 and
clamping the gauge in predetermined relation
with the presser foot by tightening the set screw
25. When it is not desired to use the gauge it can
be qm‘ckly removed from the presser foot by
simply loosening the set screws 28 and then with
drawing the bar 25 from the recess |5. After
the operator has mounted the attachment on
the presser foot, the bar 25 is adjusted with
respect to the presser foot to bring the gauge
?nger 35 a distance from the needle which it is
desired to place the row of stitches from the
edge of the fabric or other material to be stitched.
The bar is then clamped in the recess it by the
set screw 25 and spring i‘! so that the gauge is
securely held in the adjusted position.
The gauge ?nger normally projects beyond the
lower plane of the presser foot a distance at least
equal to that of the greatest thickness of the
material to be stitched, within the capacity of I
the sewing machine
It, therefore, follows that
when the presser foot is lowered in the conven
tional manner into operative engagement with
the material to be sewed the gauge ?nger 3|) will
?rst come into contact with and rest upon the
upper surface of the sewing machine case or
frame B as indicated by full lines in Figure 5.
As the presser foot continues its downward move
ment into pressure engagement with the mate
rial to be stitched the gauge ?nger 30 will be
maintained in a vertical upright position by the 75
2,130,446
co-action of the spring 35 and bar 25 While said
bar will move downwardlyjwith respect to the
gauge ?nger through the opening 3| until the
presser foot comes to the at rest position as in
CPL
dicated by broken lines in Figure 5
It is thus
seen that the gauge ?nger is not only maintained
in proper position for guiding the material dur
ing the stitching operation but it is also adapted
to automatically adjust itself without attention
10 on the operator’s part to compensate for mate
rials of different thickness.
Although the construction and operation of
my novel gauge attachment are particularly
simple, practical, and e?icient, I do not wish to
be limited to the exact details thereof shown, as
it is evident that various changes may be made
therein without departing from the spirit of the
invention as set forth in the appended claims.
I claim:
1. In a stitching ‘gauge for sewing machines, a
a supporting bar having one end portion thereof
adapted to be adjustably connected with the
presser foot of the sewing machine, the other end
portion of said bar providing a handle by which
said bar may be manually held during the con
nection and disconnection of said bar with the
presser foot, said supporting bar having a stop
element at the junction of said inner and outer
portions thereof, a gauge ?nger having an aper
30 ture receiving a portion of the bar adjacent said
stop element therethrough and adapted to per
mit vertical movement of the bar with respect to
said gauge ?nger, and spring means secured to
the under side of said handle portion of the bar
CA (A engaging in said aperture and cooperating with
40
3
the inner end portion of said supporting bar
whereby the gauge ?nger may be releasably
mounted on the bar by longitudinal and angular
movement of said ?nger with respect to said bar.
3. A one-piece presser foot having its lower
face formed to provide a continuous presser sur
face and its upper face provided with a groove
extending transversely thereof adjacent the
shank of said presser foot, said shank having a
recess in the front side thereof extending up— 10
wardly from said groove, a flat spring member
mounted in said recess with the lower end thereof
extending into said groove adjacent one side
thereof, means engaging the upper end portion
of said spring member for securing said‘ spring
member to the shank of the presser foot with the
front side of the spring substantially ?ush with
the corresponding side of the presser foot shank
and a screw connected with the shank and en
gageable with the lower end portion of said spring
for moving said end of the spring toward the
opposite side of the groove for clamping an at
tachment member to the presser foot.
4. In an attachment means of the class de
scribed, the combination with a presser foot hav
ing a groove therein extending transversely
thereof adjacent the shank of the presser foot,
a supporting bar member having the inner end
portion thereof adapted to slidably extend
through said groove and an outer end portion 30
providing a handle, a relatively thin fiat gauge
member, and means operatively connecting the
gauge member to said bar member at the junc
tion of said end portions thereof including a rel
atively narrow neck section on one of said mem
said stop element for operatively connecting the
bers and an aperture in the other one of said
gauge ?nger with the bar so as to project down
wardly from said bar substantially normal
thereto
members slidably receiving said neck section
2. A stitching gauge as in claim 1 wherein the
supporting bar is provided with a recess in the
side thereof adjacent said stop element and said
aperture is of a horizontal width corresponding
to the width of the bar at said recess and a ver
45 tical length slightly greater than the width of
therein and a spring connected with the handle
portion of the bar and having interlocking en
gagement with said gauge member adapted to 40
urge said gauge member downwardly with re
spect to the bar member for normally maintain
ing the lower edge of said gauge member in a
plane below the presser foot.
WILLIAM RAKOV.
45
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