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Патент USA US3064616

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Nov. 20, 1962
DENZABURO TERAYAMA ETAI.
3,064,606
LUBRICATING MEANS FOR THE LOOP TAKER IN THE SEWING MACHINE
Filed June 22, 1959
2 Sheets-Sheet l
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Nov. 20, 1962
DENZABURO TERAYAMA EI‘AI.
3,064,606
.LUBRICATING MEANS FOR THE LOOP TAKER IN THE SEWING MACHINE
Filed June 22, 1959
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3,054,696
Patented Nov. 20, 1952
2
3,064,606
LUBRICATING MEANS FOR THE LOOP TAKER
IN THE SEWING MACHINE
Denzahuro Terayama and Hiroshi Toriumi, Tokyo, Japan,
assignors to Tokyo Juki Kogyo Kabushiki Kaisha,
Tokyo, Japan
Filed June 22, 1959, Ser. No. ‘821,746
Claims priority, application Japan Mar. 25, 1959
3 Claims. (Cl. 112-256)
This invention relates to an improvement in a lubricat
ing system for the loop taker or other component in a
sewing machine.
are an oiling pump chamber 1 and an oil distributing
chamber 3 connected therewith by means of a connecting
pipe 2. A by-pass 6 extends from the distributing cham
ber 3 to an oil leaking chamber 7. The rotatable shaft 5
of a loop taker it) is lubricated in such a manner that a
quantity of oil over a predetermined quantity thereof to
he admitted into an oiling pipe 4- provided within the dis
tributing chamber 3 for lubricating the loop taker 10 and
its proximate parts flows through the by-pass 6. In the
oil leaking chamber 7 is provided an oil passageway 9
through which oil supplied from the by-pass 6 is directed
to a shaft oiling pipe 11 for lubricating the shaft 5. An
oil leaking station 8 is provided at the proximity of an
oil leaking or bypass outlet port 14 at the outer end of
Heretofore, several types of lubricating means have
been proposed for lubricating the loop taker in the sew 15 the oil passageway 9 at the proximity of the inlet of the
shaft oiling pipe 11. The oil leaking station 8 comprises
ing machine. They are, however, not satisfactory because
a valve element such as a ball valve 13, the outer end of
of the following drawbacks.
It is necessary to supply a quantity of oil for oiling a
the oil passageway 9 functioning as a valve seat 15, and
loop taker of a sewing machine over the amount actually
a spring 16 which biases the ball valve 13 so as to choke
needed for lubrication although the excess quantity is 20 an oil leaking passageway 20. The spring 16 is seated
slight. That is, it is required to keep oiling the loop taker
inside an axial sleeve of screw 18. The ?ow through the
oil leaking chamber 7 is controlled by means of turning
within a range of a slight excess quantity. The lubricat
ing oil varies in viscosity depending on temperature and
the screw 18 so as to adjust the force of the spring acting
on the back of the ball valve 13 against the pressure of
the speed of the machine also varies, resulting in exces
sive oil flow so as to frequently spoil the sewing thread.
oil in the oil passageway 9. When the ball valve 13 is
The object of this invention is to provide a lubricating
unseated against the action of the spring 16, oil within
means adapted to distribute desired and controlled quan
the passageway 9 leaks through a clearance between the
ball valve 13 and the valve seat 15. To this end the
tities of oil to the loop taker and other parts or compo
outer face of the adjust screw 18 is graduated suitably
nents of the sewing machine.
Another object of this invention is to provide a lubricat
so as to indicate the oil pressure on a scale 26. The
leaking or bypassed oil is admitted into a leaking port 23
ing means which obviates the defects aforenoted.
whence the same is directed to another station to be
Brie?y stated in accordance with one aspect of this
lubricated through an oil pipe or discharge conduit 24.
invention, there is provided a lubricating means compris
The rotatable shaft 5 is lubricated at a lubricating station
ing a distributing chamber, an oiling pump chamber, and
an oil leaking chamber. A loop taker is oiled from the 35 29 where oil is supplied through a pipe or outlet conduit
distributing chamber through an oiling pipe. The dis
25 from the oil passageway 9. The loop taker 10 is
lubricated by oil supplied from a passageway 27 com
tributing chamber is connected with the oiling pump cham
ber through a connecting pipe and with the oil leaking
municating with an annular oil groove 28 which in turn
communicates with an end of the oiling pipe 4.
chamber through a by-pass. A rotatable shaft of the
By virtue of the above construction in which the oil
loop taker is oiled from the oil leaking chamber through
leaking station 8 and the oil leaking passageway 20 are
at least a shaft oiling pipe. The oil leaking chamber has
an oil leaking station provided between the by-pass and
provided in the oil passageway 9 connected with the by
pass 6 communicating with the oiling pipe 4 through
the shaft oiling pipe. An oil leaking passageway is pro
which the loop taker 10 is lubricated, the oil leaking port
vided from the oil leaking station in which a spring-loaded
14 of the oil leaking station 8 being adapted to be choked
ball valve cooperates with a valve seat of an oil leaking
by the ball valve 13 so as to discharge oil having a pres
port communicating with the oil leaking chamber so as to
sure over a predetermined limit, it becomes possible to
discharge an excessive quantity of oil into an oil pipe
keep the pressure under which the loop taker 10 is oiled
through a clearance between the ball valve and the valve
constant, to retain the quantity of oil to be supplied to
seat against the action of the spring adapted to be adjusted
the loop taker 10 within a predetermined range, and ac
by means of an associated screw.
cordingly, to prevent the sewing thread and the like from
The invention will be better understood and other
any damage resulted from over-oiling. Furthermore, the
only procedure required to adjust the quantity of oil to
be supplied to the loop taker within a predetermined
55
range is to merely turn the adjusting screw 18 which is
H6. 1 is a front elevation of one embodiment of this
essentially a foolproof procedure.
invention;
objects and additional advantages of the invention will
become apparent upon perusal of the following descrip
tion taken in connection with the drawings in which:
While a particular embodiment of this invention has
FIG. 2 is a vertical section taken in the direction shown
been illustrated and described, modi?cations thereof will
by arrows on the line A—A of FIG. 1;
FIG. 3 is a vertical section taken in the direction shown
readily occur to those skilled in the art. It should be
60
by arrows on the line B—B of FIG. 1;
understood therefore that the invention is not limited to
FIG. 4 is an oblique section taken in the direction
the particular arrangement disclosed but that the appended
shown by arrows on the line E——E of FIG. 3; and
claims are intended to cover all modi?cations which do
FIG. 5 is a sectional plan taken on the line D~—D of
not depart from the true spirit and scope of the invention.
FIG. 1.
What is claimed as new and desired to be secured by
65
Similar numerals refer to similar parts throughout the
Letters Patent of the United States is:
1. A lubrication system for a sewing machine, com‘
several views.
Referring more particularly to the drawings, the pre
prising a distributing chamber, an oil pump chamber, and
an oil leaking chamber, said distributing chamber having
ferred embodiment of this invention will now be de
scribed; however, this description will be understood to 70 an outlet conduit for lubricating a component unit of
said sewing machine, conduit means for interconnecting
be illustrative of the invention and not as limiting it to
said distributing chamber with said oil pump chamber
the particular construction shown and described. There
3,064,606
.
'
'
and with said oil leaking chamber, respectively, said last
mentioned chamber having an outlet conduit in ?uid
communication with said conduit means interconnecting
said distributing chamber with said oil leaking chamber
for lubricating said machine, said oil leaking chamber
having a bypass outlet port interposed between said last
mentioned outlet conduit and conduit means, said outlet
port having a discharge conduit adapted for ?uid com
V
e
4
3
pressure in said outlet conduit of said oil leaking chamber.
3. A lubrication system for a sewing machine, com
prising a distributing chamber, an oil pump chamber, and
an oil leaking chamber, said distributing chamber having
an outlet conduit for lubricating a component unit of‘
said sewing machine, ?rst conduit means for intercon
necting said distributing chamber with said oil pump
chamber and second conduit means for interconnecting ,
said distributing chamber with said oil leaking chamber,
loaded valve for controlling the oil ?ow through said port 10 said last mentioned chamber having an outlet conduit in
munication therewith, said outlet port having a spring
to said discharge conduit, and manual means for adjust
ing the release pressure of said valve to thereby control
the oil pressure in said outlet conduit of said oil leaking
chamber, said component unit being the loop taker of
the sewing machine, the latter having a rotatable shaft
oiled from said outlet conduit of said oil leaking chamber.
2. A lubrication system for a sewing machine, com
prising a distributing chamber, an oil pump chamber, and
fluid communication with said second conduit means for
lubricating said machine, said oil leaking chamber having
a bypass outlet port interposed between said last men
tioned outlet conduit and second conduit means, said
outlet port having a discharge conduit adapted for ?uid
communication therewith, said pump chamber providing
a pressurized oil supply to said distributing and oil leak
ing chambers through said ?rst and second conduit means,
an oil leaking chamber, said'distributing chamber having
respectively, said outlet port having a spring loaded valve
an outlet conduit for lubricating a component unit of
for controlling the oil ?ow through said port to said dis
charge conduit, and, manual means for adjusting the re-V
lease pressure of said valve to thereby control the oil
pressure in said outlet conduit of said oil. leaking chamber,
said spring loaded valve comprising a ball element, and
said sewing machine, ?rst conduit means for intercon
necting said distributing chamber with said oil pump
chamber and second conduit means for interconnecting
said distributing chamber with said oil leaking chamber,
said last vmentioned chamber having an outlet conduit, in 25 said manual means comprising a rotatable member hav
?uid communication with said second conduit means for
ing a spring coacting with said ball element.
lubricating said machine, said oil leaking chamber having
a bypass outlet port interposed between said last men
tioned outlet conduit and second conduit means, said
outlet port having a discharge conduit adapted‘for ?uid 30
communication therewith, said pump chamber providing
a pressurized oil supply to said distributing and oil leak
ing chambers 'throughsaid ?rst and second conduit means,
respectively, said outlet port having a spring loaded valve
for controlling the oil ?ow through said port to said dis 35
charge conduit, and manual means for adjusting the re
lease pressure of said Valve to thereby control the oil
References Cited in the ?le of this patent
UNITED STATES PATENTS
572,042
Willcox'et'al __________ __ Nov. 24, 1896
1,350,729
Kiewicz _____________ _._ Aug. 24, 1920
1,976,151
2,430,369
2,502,346
Thaheld _n_‘ __________ __ Oct. 9, 1934
Sauer _______________ __ Nov. 4, 1947
Sauer _______________ __ Mar. 28, 1950
2,530,860
Christensen et al. _____ __ Nov. 21, 1950
2,837,173
Ciecior ;*_~_;___-__=_;;__;; June 3, ‘1958
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