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Патент USA US2134329

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Oct. 25, 1938.
‘I ‘ F, EBERT>
~
'- 2,134,329
DIFFERENTIAL MATERIAL FEEDER FOR SEWING MACHINES OF‘THE SUPPORTING ARM TYPE
Filed Aug. 18, 1936
4 Shéets-Sheet 1
Oct. 25, 1938.
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‘ 2,134,329
DIFFERENTIAL MATERIAL FEEDER FOR SEWING MACHINES OF THE SUPPORTING‘ARM TYPE
Filed Aughl8, 1956
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Oct. 25, 1938.
F. EBERT“
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2,134,329
DIFFERENTIAL MATERIAL‘ FEEDER FOR SEWING MACHINES OF‘ THESUPPORTINGJARMTYPE
Filed Aug.‘ 18, 1936'
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F_ EBERT
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27,134,329v
DIFFERENTIAL MATERIAL FEEDER FOR SEWING MACHINES OF THE SUPPORTING ARM TYPE
'
Filed Aug.‘ 18,
1936
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4 Sheets—Sheet 4
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PFIZEN gas/‘Z5 ~
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~ ] ‘2,134,329; S,
Patented Oct. 25, 1938
"
. omen}
. DIFFERENTIAL
_
MATERIAL
‘2,134,329,
=_mam-m
,ron
_, ‘.
SEWING MACHINES or'rnn sorronrmq .,
ma ‘Ebert, mam-ornament, Germany, ’
I nsaignor to Mauser-Wake A.-‘-G.',A Obcrhdorf
.on-thc-Ncckar, Germany, a Joint-‘stock ‘come i
I
' Application
pany of.
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sci-urine.
983th
August 18,1930,
Germany September 20. 1935‘
'_ I
5 ommsf" (or. 112-209)
,_w_hich is enmity cylindrical pin connecting I
I c This invention relates to mammal material
feeder for sewing machines of the supporting arm.
‘_ the ends of the fork}
type in which Ythe‘operative forceacts on the ' _
‘feeder in the direction of the axis of the support
5 ing
-
‘
“ ‘
“
e' settingliever may be‘actuatedl'bylapedal '
or anangle lever‘andis capable of swinging be- a "
tween two stops which are preferably
in a, 5'
segment of, a,‘._vscale bar'providedon the frame‘of ~
'The drive' in respect of the mainmate- _
rial feeder ‘is-located in the upright of‘the sewing
"
‘e... Asprlnd 'engasins_.w1_th the» v
machine frame and is transmitted to an inter V the sewing'machi
setting
lever
draws'ithe
latter against'the upper
mediate drive which is arranged at a stable point
' of the supporting "arm near th'eupright of the
f stop, so that when the pedal or angle ‘levergc'eases
to hemmed the original .extentl'of‘the- feedink
10 frame of the sewing machine.‘ This intermedi
movement is adjusted automatically." .Thegreat- est _ differential effect 'is-‘?xed by ,the adlustable 1
' ate drive both actuates the element-that moves
the main feederlongitudinally as wellas supplies
‘lower stop; The'stops' consist of threaded ‘bolts
the power for moving the differential feeder. .
' and are preferably‘. furnished with markingsjfor
The movement of these. two feeders may be regu
.15 lated, and there are provided separate means for \ -\ exact adjustmentjof thedifferential .eifech'jthesegis
‘
- varying the length-‘of stitch and for the differen . . markings-co-operating with the scale provided on:
tial operation,‘ in such fashion that on the one, the bar. The markings arelin theform ‘of'grad-'
nations on washers the threaded bolts; ‘which
-' hand the oscillations of the :comon element driv
_
are guided by‘means;_¢nwo surfacesgq- ‘as‘tdbe - v‘ ,
ing the two feeders and on the other hand the
secured ‘against rotation in‘ .th? semen‘, 01‘ We‘; 20
20 movements of the differential feeder may be
varied
separately.
‘
I
-
\
4‘
-
_scale_bar,'>
-».
-.
..
The two’ screw stops also permitof the adjust: . '
The inventionlrelates to means for regulating
the differential-feeder, such means" being ‘char
ment of a certain [?xed differential effect’ without 1
actuation‘ of the, pedal or the'angle' lever,‘ For
this purpose vthe twoscrews should be so adjusted .25
that in the desired position of the setting lever
acterized by the fact that the extent ‘of; the dif- ,
"2.5 ferential effect‘may be adjusted when the ma
chine ‘is running, so that a greater or smaller
amount of material may be fed vto ‘the-needle “they beanagainstw'the two sides thereof. ,The
dependent on- the‘ particular material concemed ;,_machine may accordingly thengbefemployed in _ .
and the desired form.
.30:
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‘
_
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. ",,
qthe manner of the ordinary-dl?ercntial ‘feeder
machine.»
In adaptation to the constructionsetout in 1
.1
.,
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'
,.’
"
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"
30,7
the foregoing, which enables the machine to-be : The‘ advantage of ,jthe- adius'tmentf'means for iv
- 'operated‘at- a very high speed, there is provided the differential feeder inzac'cordance with the in
in accordance with the invention an externally vention 'residesiinparticular‘ as compared with}
theknown arrangements in. the simple arrange
ment‘ ‘of the parts and in utilizationlof' existing
operated lever, which. serves to'varyv the differ
35 ential effect, on the shaft alreadycarrying the.
operating means for the. differentialfeeder, the - elements, _so_ that :it is ,possible?also. ryvitl'rfv this - .
movements thereof. being transmittedto a‘ link 1 arrangement to vuse the. machine 1' for alvhigher
engaging in direct fashion with thevsupport ‘for -' - output by increasing the‘circumfereritial velocity.
r A possible form of "embodiment" ‘or; thein'ven
the differential feeder." Preferably‘ the lever is":
»40
connected
shaft and vby
with
means
a sleeve,
of which
which'isfitted
the rotary
over
movethe ‘
_
mm isillustrated in the accompanying ‘drawings, 40 ,.
vmwmchiv
_.
H
Fig. 1 is anelevationalliview or the emf-and .
ment of the lever is conveyed to a lever system" _ thelsupmrtmg I
located within the supporting arm.v The'tsleeve ?
4
also’ serves as a. collar for the oscillatory frame
, Fig. 2 r is. a vertical section along the. linQIL-II
. and maybe readily adjusted or readjusted from ' ' in
'
the, outside.
At the other end the shaft is held. a
in the supporting arm by means of a; worm screw.
The actuation of the setting Ilever results in an
‘ material.
V50 upward movement of "the link with the
feeder support, there thus being adJusted a
ofthg .s-ewmg ‘niacin-n?’ rpm]: ‘
Fig; linthe'plane of the shaft of theinter-w“
mediate. operating-means.
_
'
.
.
‘ f -
,_ Fig.3 is a plan viewlof Fig-1,partly in section,
Fig. L4 is 7a. perspective view of the device ac
cording to the invention.
The differentialj feeder _'is ‘driven.
the*:main‘-._ ' '
shaft‘ mounted in'the frame 9 of the machine,
operating lever of the di?erential feeder inforka which drives throughthe medium of an eccentric
greater di?erential effect. _ The link encloses the,
like manner and is guided in a. segment of the
. 55 operating lever by means of a guide member,
6 a double lever 5 mounted on the vshaft Pl‘,~t_he
I] other'rarm of which lever is‘engascd by'ja' ccn-'
_
55 1
8,184,889
necting rod II, which actuates a rockinglever ll
mounted to be rotatable on a transverse spindle
which are guided in the slot 8! of the bar ll and
in conjunction with washers 41, ll are capable of
being locked in position. The washers bear
graduations ll, ll, which serve for fixing the
or axle i2 which is furnished in the supporting
arm Linv the vicinity of the upright I.’ The
rocking lever' ll possesses an additionai‘arm It .position'of-.the stops in relationto the scale I!
with which it- forms‘a' U-shaped structure, to the provided on the'b‘ar 48. To prevent rotation of
10
arms of which there is pivoted a, fork-like frame
the washers these and'also the nuts l0, II are
II, which at the other end is detachably con
’ furnished with cut faces, by means of which the
nected with a rod 20 carrying the main feeder 1.3 ~ parts in question are guided in the slot 49.
To adjust the length of
the'ppin. ,II of the > ‘with thi'sarrangement any desired extent of 10
connecting rod II is guided in a slot I‘ in the the differential effect may be determined and
lever I. _ There is also derived from the U-shaped
fixed beforehand." The differential effect may be
lever H 'the drive in respect‘ of the'diiferential . introduced in the desired extent during the op
feeder I, a third arm 23 provided on'the lever
il transmitting the oscillatory movements by
eration of the machine by actuation of the pedal
or theangle'ievenjwhereby the setting lever ll 15
mo'ves'against the lower stop. After release of
way of a connecting rod 2,4, to a support 2|,at
the end of which the differential feeding means the setting i lever this returns automatically
against the upper stop, so that there is again ad
are located.
.
d
'To adjust the diiferential effect on the part justed “the original extent of movement. The'
20 of the feeding means 3 whenthe machine is in two screw stops, however, may also be provided in
operation ‘the connecting‘ rod '24 :in the arm ' 23 is close proximity on either side ofnthe setting lever,
made to be adjustable by means ‘capable of being - so that any; desired differentialeii'ect may be set
‘ actuated externally of the machine. ' -
‘For this‘ purpose the transverse spindle~ I!
' so as to be incapable of variation. ;
' Having now particularly described and ascer
mounted in the supporting ‘arm i ‘is-extended
tained the nature of my said invention, and in
outwardly at the one end and carries-a sleeve 39, *what mannerthe same is tobe performed, I de-_‘
clare that what I claim is:
~
" towhich?thesetting lever-p.40 acting on‘the con
necting rod, '24, is firmly secured. ‘ ‘The connecting
rod“ is ‘adapted to‘oscillate around av stud of a
30 clamping. sleeve i'l‘secured‘again'st rotation by a
setting collar 28.
the inner side of the sup
porting arm I there‘is also firmly secured on the
"sleeve? II ‘a lever ",which, participates in the
rotary movement transmitted to thesleeve 39 by
,the setting lever, 40.“, The sleevev 39 serves at the
1. A differential feedingmechanism for’ sewing
machines comprising a supporting'arm, main and
auxiliary material feeders, means mounted onan
axle for operating thensaid auxiliary feeder. a
‘support for: the said feeder,an externally oper
. vated lever for varying the differential e?ect of
the said iauxiliary feeder, the said lever being
amounted on the said axle, a lever system located
" same time as a collar for‘the rock'in'g'lever II for - within the said supporting arm, a sleeve on said
the purpose of adjusting the’lever-"system ll, ‘ll, - axle for transmitting the rotary movement of the
and “in the longitudinal direction of the spindle " saidsexternally operated lever to the said lever
il in‘ order ‘to avoid ‘a clamping'e?ect of these
system, and a link- c‘o-operating with the said
sleeve andengaging with the said support by '40
lar 39 can be adjusted in an axial direction in means of a connecting rod, the said sleeve also
, order that the rocking lever ll shall'serve as a ' 'actingas a collarefor the said lever system so that
‘so
levers and the parts connected thereto.‘ The col
‘stop ‘member whereby the support 21 willnot be
jammed.‘ The spindle, i2 is held on one side of.
the supporting arm by a' screw.” To’ the lever.”
is ‘there'is
pivoted 'a link lL-whichjin turn‘ engages
the latter may be exactly adjusted in relation to
thesaidsupport.
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'
2. A differential feeding mechanism for sewing. 45’
' machines comprising main and auxiliary material
; with an eye 36 in the connecting'rod 2l,'whereby Yfeederameans mounted on an axle'for operating
thefpoiht of engagementof the connecting'rod I the said auxiliary feeder, asupport for the said.
50
24 with the slotted guide 28 of‘ the arm 23 is varied auxiliary feeder, an externally operated lever; for
,_by rocking the setting lever 40 and in this way a ’ varyingthe differential eil'ect of ‘the said feeder, 50
_‘ greater or smaller differential effect is caused on the saidlever being mounted on the axle of the
"he Part Ofthe feeder a.‘ "
1‘
In'order tov render possible’ a proper adjust
. fment of'the connecting rod at high speed of op
said operating means, a slotted guide ongthe oper
_' ating means for the differential material feeder,
"a link cooperating with the said support and en
65 ‘eration' of 'the machine provision is made for a ~ closing the said guide in fork-like manner, a
_ ready 'and frictionless guiding'of theend of the
‘ connecting rod in the'arm “23. " The‘conne'cting
rod‘ “encloses the arm“ in forklike manner
55
cylindrical pin’ connecting the, ends of the fork, .
and aguide member .on. the said, pin forguiding
the said linky-in'the slot of the guide.
7, v
. .3. A di?erential feedingmechanism for sew
Vandisfkheld by a pin or abutment BI-which is I
capable ofsliding 1r, the guide 26.
abut - ing machines‘comprising main and auxiliary ma- ;
ment is mounted on a cylindrical pin. It which. .terial feeders,means for operating the saidauxil
' connectsthe two endsof the fork.- 1'
-._iary feeder, a support for the said feeder, an
‘The ‘settinglever? is capable'of performing ’ externally operated lever for varying the differ
a rocking movement in a vertical plane and may _ .ential e'il'ect'of the said feeder', ascale bar,‘stops
be actuated either bymeans of a pedal (not on the-I said bar limiting the extent of movement
‘ shown) or by‘means of an angle lever ~(also'notJ, of thesaid lever, a'spring for drawing the said
shown). ‘A spring- _42 engaging with the ‘lever 40 ‘ lever against one of the stops, and a link for‘
returns the‘ latter into the initial
position.
V
v
_ The
movement of the setting ‘lever is limited by two‘
' stops which are made to be'acljustable.~ ‘In order
‘p transmitting the movements of the said lever and
' a
engaging with‘the said support by means of
connecting rod;
~
'
‘
-
'-
a
1 to be able to fix exactly the extent of the differen
4. A differential feeding mechanism for-sewing
f'tial effect these stopsare shiftablejf on a scale' machines'comprising main and auxiliary mate
,. bar (Lwhich is secured to the‘se'wing machine
70
.frame _9 by meansof screws 44.‘ The stops consist
rial feeders, means mounted on an axle for oper
sizing the said auxiliary feeder, a support for the ’
of threaded bolts 43;" screwed into nuts 50, 5|,
said feeder, an externally-operated lever for vary-I,
,
.
-
$13413.”
ing; the di?erential e?e'ct oi-the said feeder. the
ing the di?erential e?ect of the ma ieeder, me’ 1
said lever being mounted on the axle of the said
operating means, a scale bar, threaded bolts
constituting stops for limiting the extent of move-'
ment of the said lever, the said stops having '
in, threaded bolts constituting stops'tor limiting
markings .co-operating with the said scale bar,
a spring for drawing the said lever against one
of the stops, and a link for transmitting the
movements of the said lever and engaging with
the said support by means of a connecting rod.
5. ‘A diiierential feeding‘ mechanism for sewing
machines comprising main and auxiliary mate
rial feeders, means mounted on an axle for oper
ating the said auxiliary feeder, a support for the
15 said feeder. an externally operated lever for vary-,
said lever being mounted on the axle of the said
operating means, a scale bar having a slot there
the extent of movement of the said lever, the said 5
stops having ?attened vfaces to secure them‘
against rotation in the said slot, washers on the i
said stops having graduations adapted to co
operate with thelsaid scale bar, a
for
drawing the said lever against one of the said 10
stops, and a link for transmitting the movements
of the said lever and engaging with the said '
support by means of a connecting rod. >,
FRITZ EBERT.
15 -
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