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Патент USA US2125044

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July 26, 1938;
N. v. CHRISTENSEN ET AL
2,125,044
SEWING MACHINE
Filed April 7, 1936
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July 26, 1938.
N. v. CHRISTENSEN ET'AL
2,125,044 _
SEWING MACHINE
Filed April 7, 1936
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N. v. CHRISTENSEN ET AL
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Filed April '7, 1936
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July 26, 1938.
N. v. CHRISTENSEN ET AL
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) SEWING MACHINE
‘Filed April 7. 1956
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July 26,‘ 1933-
N. ‘v. CHRISTENSEN ET'AL
2,125,044
‘I SEWING MACHINE
‘Filed April 7, 1936
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Patented July 26, 1938
‘ 2,125,044
UNITED ‘STATES PATENT OFFICE
‘2,125,044
SEWING MACHINE
Norman’ V. Christensen, Chicago, Hans Hack
lander, Tinley Park, and Harold J. Le Vesconte,
Western Springs, Ill., assignors to Union Special
Machine Company, Chicago, 111., a corporation
of Illinois
Application April '7, 1936, Serial No. 73,064
6 Claims. (Cl. 112—63)
This invention relates to sewing machines; and top cover plate removed to expose important
it has reference more particularly to what are details which would otherwise be hidden.
known as feed-oif-the-arm machines such as
Fig. II is a view of the machine partly in side
featured in U. S. Patent No. 1,741,095 granted on
December 24, 1929 to Norman V. Christensen and
Harold J. Le Vesconte, two of the present appli
cants.
elevation and partly in longitudinal section.
Fig. III is a transverse section of the machine 5
In machines of the type speci?cally referred to,
it has been the general practice heretofore to
employ rockers and links in interposition be
tween the reciprocating needle bars and cranks
on actuating shafts therefor. These parts were
relatively heavy, and due to their momentum and
attendant vibration while in action, imposed a
‘ . speed limit beyond which the machines could not
taken as indicated by the arrows III--III in
Figs. I and ‘II.
'
Fig. IV is a fragmentary view of the machine
looking as indicated by the arrows IV-‘IV in
Figs. I and II.
10
‘Fig. vV is a fragmentary view corresponding to
Fig. I showing a rearrangement of the drive
mechanism of the machine.
,
Figs. VI and VII are plan views showing the
machine placed in two different positions rela 15
be safely. operated. Another drawback inherent
tive to a sewing table.
to pre-existent feed-oif-the-arm sewing machines
main shafts at right angles to supporting sewing
As delineated in Figs. I-IV, our improved sew
ing machine comprises a frame I with a bracket
like base 2 .(see Fig. III), which supports an
20 tables, it was necessary, as instanced for example
integrally formed coextensive hollow tubular
in Fig. II of another Christensen Patent, No.
portion 3 at an elevation. At one end, this tubu
lar portion of the frame I is formed with a
laterally projecting neck 4 which terminates in a
was that when they were arranged with their
1,792,361, dated February 10, 1931, to twist the
drive belts connecting the pulleys of the ma
chines with power pulleys on shafts extending
longitudinally of the tables, and to employ sup
plementing idler guide pulleys in connection with
the belts. Still another drawback characteristic
of ordinary feed-off-the-arm sewing machines
was that their hand wheels were mounted on the
ends of the drive shafts remote from the oper
ators where they were altogether inconvenient
of access.
‘l U
Our invention is directed toward overcoming
the several drawbacks which have been pointed
out above, the ?rst mentioned of which we obvi
ate, as hereinafter more fully explained, through
provision of simpli?ed needle actuating mecha
nism composed of a few light, yet amply strong
parts, and which permits utilization of rotary
motion to a maximum extent before conversion
into reciprocatory motion of the needle bar. The
others of the indicated drawbacks we overcome,
likewise as hereinafter more fully explained
through structural improvements whereby the
"7 machines can be converted for use in either of the
two positions relative to the sewing table without
necessitating twisting of the drive belts or the
employment of idler pulleys as heretofore; and
whereby the hand wheels are made convenient of
at access to the operators irrespective of the alter
native positioning of the machines.
In the drawings, Fig. I is a plan view of a feed
offnthe-arm sewing machine conveniently em
bodying our invention, a portion of the base of
£65 the machine having been broken away and its
‘
hollow head 5, and at the ‘other end, with a
pendant hollow projection 1 whereto is secured,
by means of screws 8 (Fig. II) a hollow work
supporting arm 9. From Figs. I and II, it will
be observed that the work supporting arm 9 ex
tends outwardly at an acute angle from the
region of its attachment to the frame I, with ‘’
its free end underreaching the head 5. Con?ned
to vertical reciprocation in upper and lower bear
ing bushings l0 and II set into the head 5 is a '
cylindric needle bar l2, which, in this instance,
carries a pair of needles l3 at its lower end. to 4:,
Secured to the needle bar l2 within the hollow
of the head 5 is a collar l5 with a lateral stud
projection it, see Fig. III, whereof the end is
?attened as at I’! and engages between a pair
of ?xed vertical guide plates l8. By virtue of
this arrangement, it will be apparent that the
needle-bar I2 is prevented from rotating in its
guide bushings l0 and II.
The. needle bar derives-its movements from a
transverse actuating shaft 19 which extends
axially through the neck 4 and through an
aligned rearwardly projecting hollow boss 20 on
the tubular portion 3 of the frame I. ,As shown
in Fig. III, the shaft [9 is journaled in spaced
bushings 2], 22 respectively set into the neck 4
and into the boss 20; and at its outer end, said
shaft carriesa pulley 23. Secured to the pulley
23 by means of a screw 24, is a hand wheel 25
which is fashioned to hollow cupelike con?gura
tion from sheet metal and formed with a center
2
2,125,044
centrics ‘I2, 13 and 14, which, through strap rods
i5, ‘i5, 11 extending down through the hollow
ing hole 23 which engages the outer end of the
shaft. To the inner end of the transverse shaft
i9 is fastened a crank head 21 whereof the wrist
pendant projection I, serve to actuate, in a well
known way, a feed dog and a looper (not illus
trated) within the work supporting arm 9 at the
free end of the latter." The longitudinal shaft
also carries a rotary looper thread take-up which
is indicated at l8, and to the forward or left
pin 28 is connected, by means of a pitman 29,
with the stud projection E3 of the collar E5 on
the needle bar [2, said crank head being weighted
as at 33 in Fig. II to counterbalance the weight
of the pitman.
The parts just described are all
hand end of said shaft is a?ixed a bevel pinion 8B
which meshes with and is driven by a bevel pin
made as light as possible consistent with the
10 strength required, and by virtue of this fact and
ion 8! on the transverse shaft IS.
the substitution of balanced rotary elements for
the comparatively heavy rocker arms and links
heretofore employed in the needle actuating
mechanisms of feed-off-the-arm machines, vi
15 bration in our improved needle actuating mecha
nism is reduced to a minimum and therefore
favors operation of the machine at higher speeds
than were practicable heretofore. Thetrans
verse shaft I9 is lubricated by oil introduced
20 from above through vertical holes 31, 32 in the
frame I into small reservoirs 33, 34 in the bush
ings, thelubricant gravitating from these reser
voirs to said shaft by way of the ports shown at
and 36.
Any leakage of lubricant outward
25 past. the bushing 22 is caught by a guard ?n 31
at the inner face of the pulley 23 and by the
latter thrown into an annular trough 38 for con
duction inwardly into the hollow of the boss 20
by way of a longitudinal duct 39 in the bottom of
The longi
tudinal shaft ll is lubricated by oil introduced
from above through vertical holes 82, 83, 84 in
the cross webs '68, 69, '55, said holes communicat
ing with small reservoirs formed in the bushings 15
55, 63 and 81. The opening 85 at the top of the
longitudinal tubular portion 3 of the frame I
is normally closed by a removable cover plate in
dicated at 86 in Fig. III. Supported by the ma
chine frame immediately to the rear of the hori 20
Zontal tubular portion 3 is a bar 81 whereon is
mounted a series'of tensions 88, 89, 90, 9| for the
needle and looper threads.
For a purpose presently explained, the frame I
of the machine is provided at the left hand end 25
of its tubular portion 3 with an axially bored
bearing boss 92 which, when the machine is ar
ranged as in Figs. I-III, is closed by a cover
plate 93.
30 said bushing.
As usual, the machine is ?tted with a presser
Fig. V shows an arrangement of the machine 30
wherein the transverse shaft is formed in two sec
foot which is indicated at 40 in Fig. II and shown
as secured to the bottom end of a cylindric presser
bar 4!, said presser bar entering the head 5 from
35 beneath through a guide bushing 52 and receiv
tions 19a, Nb and wherein the longitudinal shaft
‘Ha is extended outwardly through the bearing
boss 92 to enable attachment thereto of a pulley
35 which is intended to be used instead of the 35
pulley 23 on the transverse shaft section I91).
Accordingly, the hand wheel 25 has been reversed
ing further guidance adjacent its upper end in
a bushing 43 set into a lug lili witlun the hollow
of the head. The presser bar 4! is yieldingly
urged downward by a flat leaf spring 45 whereof
the free end bears upon the rounded upper end
of said presser bar. Theanchorage end of the
spring 45 is pierced to engage a stud 46 upstand
ing from a projection 47 at the top of the boss 20,
and its pressure is regulatable by means of a
thumb nut 48 at the lower threaded end of a
in this instance so as to envelop the pulley 23 as
shown. In the changed arrangement, the two
transverse shaft sections I9a and lab are driven 46
in unison through miter pinions Bla and 96
respectively, which mesh with a miter pinion 80a
on the longitudinal shaft ‘Ha. As arranged in
Figs. I and III, the machine is adapted to be po
sitioned as shown in Fig. VI with reference to a 45
hooked rod 49 which passes down through the
portion 3 of the frame. An arm 50 affixed to
the presser bar 4| adjacent the upper end of the
supporting table T, i. e., with the tubular portion
3 of its frame I (and the longitudinal shaft 'il)
extending at right angles to said table. With
latter passes outward through a vertical slot 5!
in the front wall of the head 5, see Figs. II and IV
and engages between a pair of ?xed guide plates
the machine so positioned, the pulley 23 on the
transverse shaft is directly aligned with a drive 50
pulley P on a power shaft S extending lengthwise
of said table, so that twisting of the connecting
belt B is unnecessary and the use of a supple
mental guide idler pulley as heretofore conse
quently dispensed with. A furtheradvantage re 55
sulting from our invention is that the hand wheel
52, the presser bar being thus held against rota
tion in the same manner as the needle bar.
A
?nger latch 53 is provided to hold the presser bar
A! in elevated position when desired or required,
said ?nger beingfulcrumed at 54 in the head 5
and formed with a cam portion 55 adapted to
engage the under-side of the guide arm 50. In
order that the presser foot All may be lifted during
60 the operation of the machine to enable starting
of the work beneath it, there is further provided
a treadle operated lever 55 which is secured to a
shaft 5i journaled in bearing lugs 58, 59 at the
top ofthe machine frame. Within the head 5
65 the shaft 51 carries a ?nger 65 which is adapted
to engage the arm 50 on the presser bar 4! from
beneath at that side thereof which is opposite the
latch ?nger 53. All the parts within the head 5
are accessible through a frontal opening 6| which
70 is normally covered by a removable plate 62 at-‘
tached by a thumb screw '63.
J ournaled in bushings 65, 66, 31 set into spaced
cross webs 3B, 69 and 13 within the horizontal
tubular portion 3 of the machine frame is a
75 longitudinal shaft ll whereon are mounted eo
25 is conveniently accessible to the right hand
of an operator seated in line with the work sup
porting arm 9 of the machine and guiding the
work to be sewn forward along said arm as in
60
dicated by the arrow thereon toward the table T.
As arranged in Fig. V, the machine is adapted
to'be positioned after the manner shown in Fig.
VII, 1. e. with the tubular portion 3 of its frame 65
(and the longitudinal shaft lla) extending par
allel with the sewing table T’ and with'the pulley
95 in a direct line with the drive pulley P’ on
the power shaft VS’ extending lengthwise of said
table. Here again, twisting of the‘ belt B’ is 70
avoided and the necessity of an idler guide pulley
obviated. Here too, the hand wheel 25 is con
veniently accessible to the right hand of an
operator seated to the right of the machine in
line with, thework supporting arm and guiding 75
2,125,044
the material outwardiof said arm-as indicated by
the arrow.'
7'
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>
If desired, our improved. machine may be mar~
keted in the form illustrated in Fig'V, and the
shaft‘ ‘HI provided with a ‘convertible belt and
hand wheel like that» shown at'2‘3, 25, instead of
3
portingarmiconnected to the rear end‘ of said
longitudinal frame portion and: underreaching
the needle head; a main. shaft journaled in the
bearing within the longitudinal frame portion and
projecting through the bearing at the front end 5
of said» frame ‘portion; a wheel on the pro
the pulley 95, so that‘either theshaft ‘H a or the jecting end. of said- shaft; a transverse shaft
transverse shaft Hla, I91) may be employed to with aligned sections journaled respectively in
drive the machine in meeting conditions described the laterally projecting bearing and in the
10 in connection with Figs. VI and VII, with the needle head, the ?rst mentioned transverse shaft
section extending out through the lateral hear
idle pulley serving as a hand wheel.
ing; a Wheel secured to the projecting end of
Having thus described our invention, we claim:
1. In a feed-off-the-arm sewing machine, a said ?rst mentioned transverse shaft sections;
hollow frame with a longitudinal portion having
15 a lengthwise shaft-bearingr within it and ‘an
aligned shaft-bearingopen to the exterior at
the front end thereof, another shaft-bearing
projecting laterally at right angles from said
longitudinal frame portion at said end and open
20 to the exterior, a hollow needle head projecting
laterally at right angles from said longitudinal
frame portion at said end at the opposite side
and having a bearing therein axially aligned with
said laterally-projecting bearing, and a forwardly
extending horizontal work-supporting arm con
nected to the rear end of said longitudinal frame
portion and underreaching the needle head.
2. In a feed-off-the-arm sewing machine, a
hollow frame with a longitudinal portion having
30 a lengthwise shaft hearing within it and an
aligned shaft-bearing open to the exterior at the
front end thereof, another shaft-bearing in the
same horizontal plane with the two bearings
aforesaid projecting laterally at right angles
35 from said longitudinal frame portion at said end
and open to the exterior, a hollow needle head
40
45
50
55
gearing connectingv the main shaft and the two
transverse shaft sections within the hollow of 15
the longitudinal frame portion; a needle bar
guided for up and down movement in the head;
and actuating connections between the needle
bar and one of the transverse shaft sections.
5. In a feed-off-the-arm sewing machine, a 20
hollow frame with a longitudinal portion having
a lengthwise shaft-bearing within it and an
aligned shaft-bearing open to the exterior at
the front end thereof, another shaft-bearing in
the same horizontal plane with the two bearings
aforesaid projecting laterally at right angles 25
from said longitudinal frame portion at said
end, a hollow needle head projecting laterally
at right angles from said longitudinal frame por
tion at said end at the opposite side and having
a hearing therein axially aligned with said lat
erally-projecting bearing, and a forwardly ex
tending work-supporting arm connected to the
rear end of said longitudinal frame portion and
underreachingthe needle head; a main shaft
journaled in the bearing within the longitudinal 35
projecting laterally at right angles from said frame portion and projecting through the bear
longitudinal frame portion at said end at the op-/ ing at the front end of said frame portion; a
posite side and having a bearing therein axially wheel on the projecting end of said shaft; a
aligned with said laterally-projecting bearing, transverse shaft with aligned sections journaled 40
respectively in the laterally projecting bearing
and a forwardly extending horizontal work-sup
porting arm connected to the rear end of said and in the needle head, the first mentioned
longitudinal frame portion and underreaching, transverse shaft section extending out through
the lateral bearing; a wheel secured to the pro
the needle head.
jecting
end of said ?rst mentioned transverse
3. In a feed-off-the-arm sewing machine, a
he. Or
hollow frame with a longitudinal portion having shaft sections; gearing connecting the main
shaft
and
the
two
transverse
shaft
sections
a lengthwise shaft bearing within it and an
aligned shaft~bearing open to the exterior at the within the hollow of the longitudinal frame por
front end thereof, another shaft-bearing in the tion; a needle bar guided for up and down move
same horizontal plane with the two bearings ‘ ment in the head; and actuating connections
aforesaid projecting laterally at right angles from between the needle bar and one of the trans 50
said longitudinal frame portion at said end and verse shaft sections.
6. In a feed-off-the-arm sewing machine, a
open to the exterior, a hollow needle head pro
hollow frame with a longitudinal portion having
jecting laterally at right angles from said longi
tudinal frame portion at said end at the opposite , a lengthwise shaft-bearing within it and an
side and having a bearing therein, axially aligned aligned shaft-bearing open to the exterior at
with said laterally-projecting bearing, and a the front end thereof, another shaft-bearing in
the same horizontal plane with the two bearings
closed housing at the juncture of the longi
tudinal frame portion,'the laterally projecting
shaft-bearing, and the laterally projecting needle
60 head, a forwardly extending horizontal work-sup
porting arm connected to the rear end of said
longitudinal frame portion and underreaching
the needle head.
4. In a feed-off-the-arm sewing machine, a
65" hollow frame with a longitudinal portion having
a lengthwise shaft-hearing within it and an,
aligned shaft-bearing open to the exterior at the
front end thereof, another shaft-bearing project
ing laterally at right angles from said longitud
70 inal frame portion at said end, a hollow needle
head projecting laterally at right angles from
said longitudinal frame portion at said end
at the opposite side and having a bearing therein
axially aligned with said laterally-projecting
bearing, and a forwardly extending work-sup
aforesaid projecting laterally at right angles
from said longitudinal frame portion at said
end, a hollow needle head projecting laterally at 60
right angles from said longitudinal frame por
tion at said end at the opposite side and having
a bearing therein axially aligned with said lat
erally-projecting bearing, a closed housing at
the juncture of the longitudinal frame portion,
the laterally projecting shaft-bearing, and the
laterally projecting needle head, and a forwardly
extending work-supporting arm connected to the
rear end of said longitudinal frame portion and
underreaching the needle head; a main shaft 70
journaled in the bearing within the longitudinal
frame portion and projecting through the hear
ing at the front end of said frame portion; a
wheel on the projecting end of said shaft; a
transverse shaft with aligned sections journaled 75
4
2,125,044
respectively in the laterally ‘projecting bearing
and in the needle head, the ?rst mentioned trans
verse shaft section extending out through the
lateral bearing; a wheel secured to the projecting
end of said ?rst mentioned transverse shaft sec
tions; gearing connecting the main shaft and the
two transverse shaft sections within the closed
housing aforesaid; a needle bar guided for up
and down movement in the head; and actuating
connections between the needle bar and one of
the transverse shaft sections.
NORMAN V. CHRISTENSEN.
.5
HANS HACKLANDER.
HAROLD J. LE VESCONTE.
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