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Патент USA US3018757

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Jan. 30, 1962
A. MoRo
3,018,747
sUPPoRT ARRANGEMENT FoR MOUNTING THE MEcHANIsM LocATED
UNDER THE EASE oF sEwING MACHINES
EiIed April s, 195e
[_nventor
Ã/vra/v/a More
Attorney
United States Patent O
wf'
1C@
3,913,747
-
Patented Jan. 30, 1962
2
l
Referring 4to FIGS. l and 2 of the drawing, by ‘.1 is
indicated the support member, which is fixed by means
3,013,747
SUPPORT ARRANGEMENT FÜR MGUN'HNG THE
of the screws 2 onto the under side of the base 3 of the
WCHANISM LQCATED UNDER THE BASE 0F
sewing machine. The support member 1 contains; the
SEWING MACHINES
feed claw driving shaft 4 rotatably mounted upon the
Antonio Moro, Milan, Italy
two counterpoints 5 fixed in special seats of the support
Filed Apr. 3, 1956, Ser. No. 575,799
member by means of the screws 6; the hook driving
Claims priority, application italy Apr. 14, 1955
shaft ‘7 mounted in the two bearings 8; the hook actu~
1 Claim. (Cl. lll-258)
ating shaft 9 mounted in the bearing 10 and the seat body
In sewing machines the machine elements located un 10 11 of the hook. The feed claw driving shaft 4, which re
ceives its oscillatory movement from the stitch adjusting
der the base of the machine and namely those for the
mechanism such as that disclosed by US. Patent No.
transmission of motion to the hook and the cloth feed
1,877,757, carries with the two projections 12 the mov
claw are ordinarily mounted in supports established upon
able claw 13. The hook driving shaft 7 receives its
seats formed on the base itself.
oscillatory movement by the mechanism crank-shaft con
This renders the machining of the base of the machine
necting rod, also disclosed by U.S. Patent No. 1,877,757,
laborious and costly, for it is a question of forming ele
and carries the half bevel gear 14 meshing with the
ments requiring great precision from a complex work
bevel gear ‘15 ñxed upon one end of the hook actuating
piece.
shaft 9, which carries at the other end the hook oper
To obviate this complicated machining operation, it
has been proposed to fix underneath the base of the sew 20 ating sector 16. The seat body 11 is fixed to the support
member 1 by means of the screws 17 and 18.
`
ing machine a system of separate supports, so combined
As it is clear from the drawing, it is suiiicient 'to un
together as to ensure the regular mounting of the above
screw the three screws 2 to demount the whole base
mentioned machine elements.
group which, being entirely independent of the working
Even in this manner the machining diñiculties in the
members placed below it, results in a simply and rapidly
fabrication of sewing machines are reduced. However,
the exact fitting requirements that the various supports
demountable unit.
By only slightly undoing the three screws 2 it is possi
combined together require in order that the exact loca
ble, due to an elongated configuration Z1 of the holes
tion of the elements therein assembled and necessary for
a regular operation of the machine be ensured are of a 30 through which pass the said screws to slightly move the
unit in order to tix it in the best position with respect
small degree.
to the needle and the members that are to be connected
The fabrication of sewing machines is appreciably
to the said unit.
simpliiied, their cost reduced and their operation at the
As shown in FIG. 3, the sector 16 pushing the hook
same time improved by the support member for mount
ing the machine elements arranged under the base of the 35 16’ is shown in section. Through this section there is
clearly seen the circular seat 11’ of the seat body 11
machine that is the object of the present invention.
wherein the hook 16' is guided in its oscillating move
This arrangement is characterized by the fact that
ments under the action of oscillating hook sector 16 con
it is constituted by a readily detachable single support
nected to shaft 9.
member detachably mounted on fthe under side of the
According to the modification shown in FIG. 3, the
sewing machine base. The support member is so shaped 40
bearing 10 of the hook actuating shaft 9 `is formed in
as to carry the seats of all the elements required for
one piece with the seat body 11 of the hook, in such
the assembling and operation of the operating members
a «manner as to be demountable together with the seat
of the machine. More particularly, the support mem
body 11 of the hook from the support member ‘1.
ber according to the invention carries the driving shaft
of the hook, the hook operating shaft, the seat body 45 It is clear that the particulars of construction and
application of the arrangement can Vary with respect
of the hook and the claw driving shaft. The hook actu
-to those represented in the drawing and above described,
ating shaft, as a particular case, is able to be mounted
the arrangement still remaining within the scope of the
in a bearing integral with the seat body of the hook.
invention. Thus, for instance,~ in place of counterpoints,
All these elements can be mounted and adjusted before
applying the support member of the machine upon its 50 ball or roller bearings can be set in the support member
1 for supporting the feed claw driving shaft 4. The
base thus greatly simplifying the machine, the fitting
seat body '11 of the hook instead of being fastened by
operation and the adjustment thereof.
means of screws 17 and 18, can be fixed in a recess of
According to a further feature of the invention, the
the support member 1 intended to receive it, either by
seat body of the hook, with or without the bearing
of the hook actuating shaft, carried by the support 55 press fit or in any other suitable manner. Instead of
by three screws 2 the support member 1 can be fixed
member, constitutes a part by itself, that is detachably
onto the machine with a different number of screws or
mounted on the support member. Thus, the advantage
by differing fastening means and so on.
is established of being able to separately machine the
said seat body which on account of operating necessities
presents weak points, and easily substituting it when 60
necessary, without having to discard the entire support
member in case of eventual breakage.
An example of an embodiment of the arrangement
according to the invention is illustrated in the .annexed
drawing, in which:
FIG. 1 is a plan view of the arrangement applied to
theunderside of the sewing machine;
What I claim is:
'
In a sewing machine having a support member pro
vided with means for detachably and adjustably mount
ing said support member to the underside thereof, said
support member carrying a driving shaft for driving a
feed claw, a hook-drive shaft disposed parallel to said
driving shaft, a half-bevel gear mounted on one end of
said hook-drive shaft, a hook-actuating shaft mounted
in a bearing and disposed perpendicular to said hook
drive shaft, a bevel gear mounted on one end of said
FIG. 2 is partial elevation of the arrangement viewed
hook-actuating shaft meshing with said half-bevel gear,
in the di-rection 0f arrow A of FIG. l, and
FIG. 3 is a modification of 1a particular portion of 70 and a seat body having a circular seat for the hook
of the sewing machine including a hook-operating sec
FIG. 1.
3,018,747
3
tor mounted on the other end of said hook-actuating
shaft, said seat body beinxc,7 detachably mounted on said
support member, said seat body and said bearing being
formed into an integral unit.
References Cited in the file of this patent
UNITED STATES PATENTS
1,295,133
1,877,757
2,009,328
De Voe ______________ __ Feb. 25, 1919
Hemleb _____________ __ Sept. 20, 1932 lo
Sauer _______________ __ July 23, 1935
4
2,009,998
2,143,681
2,242,962
2,337,066
2,341,975
2,3 60,048
2,651,274
2,671,418
Gonyk ______________ __ Aug. 6, 1935
Strain ______________ __ Ian. 10,
Waterman ___________ __ May 20,
Schmitt _____________ __ Dec. 21,
Chason _____________ __ Feb. 15,
Christensen _________ __ Oct. 10,
Hohmann ___________ __ Sept. 8,
Toombs _____________ __ Mar. 9,
1939
1941
1943
1944
1944
1953
1954
FOREIGN PATENTS
83,048
Sweden _______________ __ Apr. 2, 1935
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