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Патент USA US3046931

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July 31, 1962
A. SCHWARZBERGER
3,046,921
FOLLOWER UNITS FOR QUILTING MACHINES
Filed Jan. 5, 1960
4 Sheets~$heet 1
FIG. I
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FIG.5
INVENTOR.‘
ARTHUR SCHWARZBERGER
BY
ATTORNEYS.
July 31, 1962
A. SCHWARZBERGER
3,046,921
FOLLOWER UNITS FOR QUILTING MACHINES
Filed Jan. 5, 1960
4 Sheets-Sheet 2
2
92'
Ll
FIG.2
_
-
INVENTOR.‘
ARTHUR SCHWA RZBER GER
ATTORNEYS.
July 31, 1962
A. SCHWARZBERGER
3,046,921
FOLLOWER UNITS FOR QUILTING MACHINES
Filed Jan. 5, 1960
FIG.8
4 Sheets-Sheet 4
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7FIG.
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FIG.9
45‘
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LL
INVENTOR."
ARTHUR SCHWARZBERGER
.
ATTORNEYS.
United States Patent () "’IC€
aetaezi
Patented July 31, 1962
2
1
frame which carries the sewing machine 19 by means of _
3,946,921
-
FOLLOWER UNITS FGR QUH'TING MACFrh‘KS
Arthur Schwarzherger, % A.B.M. Mfg. (30.,
1306 S. Pulaski Road, Chicago 23, Ill.
Filed Jan. 5, 1969, Ser. No. 548
4 Claims. (Ql. 112—118)
_ My invention relates to machines which stitch quilting
suspension brackets 20. The power drive to the head
of the sewing machine is carried in a tubular housing 25,
while that to the base of the‘sewing machine is carried in
a similar housing 26, these housing extending from the
supporting post 18 of the bridge frame.
‘
FIG. 3 shows a pair of floor rails 3% extending along
the front and rear of the bridge frame 15, respectively.
These rails are secured to the floor of the space occupied
with a base pattern, and more particularly to the follower 10 by the machine, and are designed to form atrack for
unit for such pattern. The latter is usually a network of ' the travel of a frame 32 in the lower part of the machine
from side to side in the space between the posts 17 and
V-belt material secured on a ?at base; and the conven
18. The frame 32 is formed with cross-bars 313, and car
tional follower unit employs guides which track along the
ries wheels 35 which ride on the rails 30-.
sides of the V-belt and are geared to assume a di?erential
The side bars of the frame 32 are also formed to serve
action when the follower rounds a pattern curve. The 15
as a track for an upper frame 4%) whosetravel is cross
smooth tracking of the follower often causes it to drag
wise of the track rails 30, that is, between front and rear
and lose traction, so that it takes considerably longer to
positions. The frame 40 also has cross-bars ~41, and car
accomplish the- stitching operation.‘ Also, the spread of
ries wheels 42, which ride on the side bars of the frame 32..
the guides prevents the follower from conforming to
Mounted as described, the upper frame 40 may not only
turns of less than a 3-inch radius in the pattern. Further,
be moved forth and back, but from side to side with the
the conventional quilting machines carry the pattern
lower frame 32, as the latter rides the track rails 30.
in one of the movable frames of the machine. When
This permits any object on the frame 40 to be carried
it is considered that some patterns weigh as much as
in any lateral direction, such ‘as to follow the meshes of
400 or 500 pounds, it will be realized that the convention
al power drive for the movable frame will operate under 25 a quilting pattern 45. The latter, which may be of wood
or metal, rests on the floor between the rails 30, and the
‘a considerable strain. In fact, where a carrier, as mounted
frame 40 carries a follower unit which depends into track
in the bridge frame of the machine, is subject to the strain
lines in assembled layers of textile materials in conformity
referred to, it imposes a vibrating in?uence on the bridge "
ing contact with the strip detail 45a of the pattern. As
seen in FIG. 7, the strip 45a has the cross-section of a
frame which causes the stitching needle to break.
The novel follower unit and its environment have been 30 V-belt, and is made of rubber; and the narrow surface
of the strip is the top one.
designed to eliminate the above de?ciencies. Thus, one
The follower unit originates with a horizontal plate 50
object of the present invention is to provide a follower
which is bolted at 51 to the upper traveling frame 4%,
unit which employs a gear-type roller for application to
and carries an electric motor 53‘. The follower which rides
the top of the pattern track, such top being ribbed to
mesh with the roller ‘and eliminate all slippage and drag 35 the strip 45a is a gear wheel 55; and the strip is formed
with cross-teeth 4512 with which the teeth of the gear wheel
from the travel of the follower unit.
mesh as it travels over the pattern strip. FIG. 7 shows
Another object is to con?ne the engagement of the
that the gear wheel receives guard discs 57 at the sides
follower with the track to the point where the roller en
gages the top. of the track, so that the follower may con
to con?ne the course of the gear wheel to that of the
form to track curves of as small a radius as 1%. inch .40 pattern strip.
and meet no hindrance in this respect.
A further object is to mount the follower unit for track
ing engagement ‘at ?oor level, so that the pattern, what—
ever its size or weight may be, will rest on the floor clear
of the machine frame and impose no strain on any part
of the machine. >
An additional object is to construct the follower in a
manner to both con?ne its path to the course of the pat
tern track and have the freedom of crossing the pattern
guard discs 57.
The follower unit consists primarily of a vertical tube
60 and a housing 61 at the bottom of the same.
The
tube rises slidably through a pillow block 63 which has
side ?anges 63a for securing the pillow block to 'a down
?ange 50a of the plate 50. The journaled disposal of
the tube 60 in the pillow block permits the housing 61
50 to turn about the axis of the tube as the gear wheel 55
meshes Where one track intersects another.
With the above objects in view, a better understanding
of the invention may be had by reference to the accom—
panying drawings, in which:
FIG. 1 is a front elevation of the quilting machine,
showing the position of the follower unit;
FIG. 2 is an elevation from the left-hand side of FIG. 1;
FIG. 3 is a top plan view;
Where one strip crosses another, FIGS. 7
and 10 show that the strip is deeply grooved at 45c on
four sides in order to permit the crossing travel of the
‘
which is carried by the housing—fo1lows the course of
the pattern. The tube 69 carries a collar 65 at'the top,
and a collar 67 just above the housing. A compression
spring 68 is coiled around the tube ‘between the pillow
block and the collar. 67. The latter is sl-idable'on the
tube and adapted to be ?xed by a set screw 67a. Thus,
the follower unit rests by its own weight on the pattern.
~ Should high points or hurdles occur along the pattern,
FIG. 4 is an enlarged section on the line 4—4 of FIG. 3;
the spring 68 will yield to the rise of the housing 61.
FIG. 5 is a view from the right-hand side of FIG. 4;
FIG. 6 is a further enlarged duplication of the lower 60 Should it be necessary to increase the tension of the
spring, the collar 67 may be set at a higher point than
portion of FIG. 4, as the'follower is about to engage the
shown. It follows now that the regular function of the
pattern track, and showing a cover removed from a hous
spring 68 is to maintain the gear wheel in engagement
ing to reveal the interior thereof;
with the pattern under a suitable degree of pressure.
FIG. 7 is a section on the line 7-—7 of FIG. 6;
The function of the motor 53 is to drive the gear wheel
FIG. 8 is a section on the line 8—8 of FIG. 7;
65
55. Thus, a vertical shaft 70 is journaled inside the tube
FIG. 9 is ‘an enlarged view of a fragment of the pat
60, the shaft rising from the same to receive a pulley 72.
tern; and
A drive belt 73 extends from the motor to the pulley '72.
FIG. 10 is an enlargement of a crossing area indicated
The housing 61 is a heavy casting open at the sides and
at 16 in FIG. 9.
Referring speci?cally to the drawings, 15 denotes the 70 formed with an internal partition 61a; and cover plates
61b and 610 are applied to the sides of the housing and
top bar, 16 the lower bar, 17 the left-hand supporting
post, and 18 the right-hand supporting post of the bridge
secured by screws 61d.
.
3,046,921
The upper part of the housing 61 journals a cross
.
v
1' a
'
grooves, - Finally, the follower unit is compactly grouped‘
.with', thetop plate, facilitating its, complete separation
from the machine in case a ‘major repair or overhauling
' shaft 75,.while the lower part journals a similar shaft-.177.
- 1 The housing is formed with aneck are at the top through
which the shaft 71} descends‘ to terminate with a worth 78.
1 A pinion StIcai-riedby ‘the cross-shaft 75 is inme'sh with r
the worm 78.1 This occurs in thelarger compartment 61f
of the housing; and. the cross-shaft 75 extendsrintowthe
_’
is necessary.
‘While'I have described'the ‘invention along‘speci?c
‘ , lines, variousminorchange's or re?nements may be made
therein without departing from its principle, and I reserve‘
" smaller compartment 61g tocarry a spur pinion8-2. The
lower cross-shaft 77 also extends. into the compartment
‘‘ ?lgrto carry a spur piniongSI‘w; and anv idler gear 85‘ is 10
_ jour'naled on a 'short cross-shaft in the compartment 61g
to mesh withthespur'pinions 82 and 83. The compart
the'l'right'to employ all such changes and re?nements as.
may come'without the scope and spirit of the appended‘ ‘
claims.
,
1 claim:_
,
t
v
1. In a quilting machine or thelike, the combination
merit-161g. is closed at the bottom, as indicated at 61h,‘
with a'wcarrier, and a linear pattern, below the sarrjie;-.of
to :protect‘the gearing therein from foreign matter .and ; ; a follower supported by the carrier, the follower including
make possible’ the retention of a gear lubricant in the 15. a, gearvvheel'haviug relatively straight peripheral teeth
compartment 61g. The compartment 61]’ has aclosure - directed _for...1‘l0iling engagement with the pattern, said
‘ . below the‘worm7drive,:but
pattern ‘including a relatively low gear-rack pro?le on the
necessarily open at the bot.
, ~tom-to expose. the‘ gear wheel'55 for engagement with
upper surface thereof for meshing engagement and po"i-‘ *
the pattern." The gear wheel is of course tightlymounted
on the ‘shaft 77, while the guard discs 57 are free to turn
tive traction with
gear teeth, thepattern including-r
relatively, straight. sides; ‘said .follower'including horie p'
on. such’shaftfan'd'?have outward hubs 5"7a_to ?ll the
zont-al shaiftmeansuponwhioh said gear wheel is mounted
spaces‘between' the'discs and the adjoiningjisections of
and'individual guard discsjournalled for. free rotation on ,
‘the housing. ~ -
said shaft means alongside said .gear wheel ‘for. traveling
carries an upstandingbracket 99 for
along said pattern sides‘. when .said gear wheel is rotated.‘
‘which extends to straddle the vtube
An air valve 93 has a'lifter
I 95 ‘for the for
in order to raise the follower unit
vcross each other, saidintersecting: portions of» said- strips
11 when the machine is not in use. The
also used when the frames ‘at} and 32' :
having groove portions .therebet'ween for permitting said
discs to pass, lfnerethroughxa's said gear'wheel moves over
are tto'bér-whee d‘ to onevside-for access to the sewing
the intersectionof saidstrips.‘v
machine in‘ case it's‘needle breaks or some repair to it is
. :3. The structure of claim '1; including resilient means
"
I
~.
'
engaged with said follower and normally urging saidfolé
lower into engagement with‘s'aid pattern.'
show the‘followerslightlyiaisedQ
,
‘ ' signed to_be' shut oii just beforethesewing machine, and
" .thr’ou'gh'the agency of an. inherent quick-stop brake for
the motor shaft.‘ Thus, ar'strain is not put on the sewing
machine, and the same may “take a few ?nal stitches and
_
1 r
, '
-
4. The structurelof claim i1'whereinsaidfollo-wercom
prises a housing including upper, side and lower com
partments, a drive shaft projecting into said upper com
partment, a second drive shaft projecting laterally from.
said upper compartment into said side compartment and
drivingly connected to said ?rst mentioned drive shaft,
40 7a gear train connected-to said second drive shaft ‘and
disposed within said side compartment, said ‘horizontal
do'soine final ‘tacking before the sewing machine stops.
shaft means projecting into said side compartment and
'_ It is now apparent that the novel follower unit is con
trollable to lift and lower it in relation to the pattern,
. ' and ‘to stop'" instantly and without damage tothe sewing
drivingly connected to saidigear trainrr
v
' r‘
4
'1' ‘
References Cited inthe file of this patent
\ _ machineneedle. Further, the unit is free to follow the
UNITED STATES PATENTS,’
‘, coursehof the pattern while securing positive traction
192d
the, same by the use of a gear wheel'rin mesh with
1,329,411
Kan-ta et Ial.,__'._'_____‘____ Feb. 3,,
_ the pattern strip. ‘Further, the mechanism for, driving the
71,997,779
Miller ____ _,____t___,__,_- Apr. 16, 1935v
'
_
hecessa'ryL‘ThUs, the pattern" or other ?oor projections
The "switches andotheri‘controls' arercarried in the
F right-hand post 18 of thépinachine; The motor is de
.
=
will-not be in the way of the follower unit as the frames
are wheeled'backof the zone of approach. vFIGS. 6 to 8
~
2. The. structure of claim. 1 wherein. said pattern com
prises a.network of .stripsjrsome of whichintersect. and. M
gear wheel ismostly concentrated in thejbottom housing
.of the"followerv unit, where it adds ‘its own weight to
" that- of the massive housing in order to keep most of the
weight-'ofvthelfollower unit at the bottom for reliable
50
2,119,341
Milner ___L _________ __ May '31; 1,938,
"2,152,819
Rothchild __.__ ' ‘
2,236,421
2,279,628
‘___.. Apt‘- 4, 1939
Boettcher _'_>__.._;_ ____ _'__'Mar. 25,, ,1941;
- Marsack __'__'_.____r____ Apr. 14, 1942
2,395,653 ' ‘>Attwood >_.__;__'__‘_;_____ Feb. 26,;1946; 7
tracking engagement with the pattern. Further, the fol-_
lower isspring-backed for surmounting irregularities ‘in 55 2,410,240' Schlicksupp _._'___._,_,_.._._ 001.. 29," 1946‘.
2,501,239
Schwartz'm _______ __'___ Mar. 21,519.50
'
the pattern'without shock to the gearwheel drive. ‘Fur?
r 2,609,769
Kramer et‘ al.;_;; _____ __ Sept. .9, 1952* >
ther, the’ gear wheel is quite simple, since Vitonly meets‘v
v2,735,313
Dickson ___..'_. _______ _._-_ Feb. 21, 1956 ‘
the top 'of‘the pattern strip; andthe freelyrg'ournaled
guard {discs serve ,both' to keep .the'gear wheel‘ in track-,
engagingrwalinement and to thread through the crossing’ so 1 631,137 " Great Britain .___~ _____ __ Oct, 27,
V
.
.
FOREIGN
PATENTS
"
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