Improvements in Gearing for Transmitting Power, and Means for Lubricating the same.
Year: 1893

page_text: Date of Application, 28th Dec., 1593-Accepted. 17th Feb., 1894
COME DEI DI ET TUATION.
[Communicated from abroad by THE SINGER MANUFACTURING COMPANY
of New York, Sewing Machine Manufacturers.]
Improvements in Gearing for Transmitting Power, and Means for
Lubricating the same.
I, ALEXANDER ANDERSON Manager of the Singer Manufacturing Company's
Works, Kilbowie, Dumbartonshire do hereby declare the nature of this invention
and in what manner the same is to be performed as communicated to me to be
particularly described and ascertained in and by the following statement :-
My invention relates to power transmitting devices to be used for driving sewing
or other light machines and it has for its object to provide a power transmitting
device of such a character that the driving and driven pulleys may be freely
lubricated, so that they will run as easily as possible, the construction of the parts
being such that the surplus oil will be returned to the oil cup and will thus be pre-
vented from escaping to the floor or coming in contact with the friction faces of
the pulleys and thus the objection of soiling the work or the Hoor of the shop will
be avoided.
To this end my improved driving-attachment or power-transmitter comprises a
supporting bracket having a chambered stud which supports the pulleys and which
is provided with an oil cup. Said chambered stud is furnished with a wick through
which, by capillary attraction, the oil from the oil cup is led to the pulley bearing;
the said stud being preferably hollow and being provided with perforations through
which the oil can pass outward to its exterior surface. Mounted on said stud so as
to run freely thereon, is a pulley which is the pulley to be driven when the power is
to be usefully applied, the said pulley having a hub the inner end of which extends
into a housing, forming an oil guard chamber, and over the said oil cup, and the
said hub is provided with an internal tapered recess forming an oil guard chambér
for the hub of the driving pulley or idler.
Extending outwardly from said hub of the driven pulley is a sleeve on which
the driving pulley or idler is mounted said sleeve having perforations for the passage
of oil. The hub of the driving pulley is closed at its outer end by a button or plug
and its inner end is extended into the oil guard chamber in the hub of the driven
pulley. From this construction it results that any surplus oil from the interior of
the hub of the driving pulley will be prevented from escaping from the outer end
of said hub and can therefore only escape from the inner end of said hub which
extends within the said oil guard chamber of the driven pulley and as it may drip
or be thrown into the said oil guard chamber it will be caused by centrifugal action,
or by gravity, to return to the oil cup. Also auy surplus oil from the bearing of
the driven pulley can only escape from the inner end thereof and will be caused by
gravity or centrifugal force to be returned to the oil cup. To prevent the oil from
creeping outward along the inner ends of the hubs of both the driven and driving
pulleys the exteriors of said inner ends of said hubs are preferably provided with
one or more annular grooves.
:
As a means for moving the driving pulley into frictional contact with the driven
pulley (when my invention is embodied in a frictional-clutch power transmitter) I
preferably pivot to the supporting bracket an operating lever having a projection
by which the driving pulley may be forced against the driven pulley, said lever
being operated by means of a suitable treadle or other connection and being
provided with a brake which is normally held in contact with the flange on the
driven pulley by a spring operating on said lever and which brake serves to arrest

page_text: the movements of the driven pulley as soon as the pressure on the treadle connection
of said lever is relieved.
In the accompanying drawings Figure is an end view of my improved driving
attachment constructed as a friction clutch device and Figure 2 is a sectional side view
thereof. Figures 3 and 4 are end and sectional side views respectively of a slightly
modified form of my invention. Figure is a side elevation of a sewing machine
with a further modification of my invention applied thereto, the driving and driven
pulleys being shewn in section. Figure 6 is an end elevation of the same, a portion
of the table or bench on which the sewing machine is mounted being shewn in
section.
Referring more particularly to Figures 1 and 2, A denotes a hanger or bracket
which is to be attached to the underside of a bench or table on which the machine
to be driven is mounted, the said bracket being provided at its lower portion with
an oil cup B. Attached to the bracket A (by means of a set screw e or other
suitable means) is a chambered stud C (preferably made as a perforated sleeve) on
which is loosely mounted the driven pulley D the outer face of which, as herein
shewn, is provided with a friction ring of leather or other suitable material.
The hub of the said pulley D is extended outward in the form of a sleeve d' which
is provided with perforations or oil passages and on which is mounted the driving
pulley E, the outer end of said sleeve being preferably closed by the screw
plug The inner end portion 3 of the hub of the driven pulley is extended
inward into an oil guard chamber a formed in the bracket or hanger A and
over the oil cup B and the said hub is provided with an oil guard chamber d
made tapering and having its largest diameter at the inner end of said hub; or
in other words, the said chamber grows larger toward the end of said hub
which extends over the oil cup. The outer end of the hub e of the driving
pulley E is closed by a plug e while the inner end of said hub is extended
into the chamber formed in the hub of the driven pulley D. The oil from
the oil cup B is led by capillary attraction, to the interior of the perforated sleeve
or chambered stud C by a wick or conductor F placed in said sleeve or stud and
depending into the said oil cup."
screws g
G denotes an operating lever pivotally supported on the bracket A by the centre
the said lever being provided near its free end with a plug or projection ¹
which when the said lever is drawn downward, as hy a treadle rod h', bears
centrally on the plug e carried by the hub of the driving pulley E, as shown in
Figure 2, which figure represents the pulleys in the positions they occupy when the
driven pulley is running. When the said operating lever G is released the spring³
which is interposed between the bar or part a of the bracket A and the said lever,
raises the latter so as to bring the brake g³ carried thereby into contact with the
flange of the driven pulley D, thereby arresting the movement of the said driven
pulley at the moment the pressure on the driving pulley is relieved.
H denotes a dress guard which is attached to the bottom of the oil cup portion
of the bracket A the purpose of said guard being to cover the belt flange in which
runs the belt through which the motion of the driven pulley D is conveyed to
the sewing or other machine to be driven.
In the slightly modified form of my invention shewn in Figures 3 and 4 the
pulley E runs as an idler and the belt k is transferred from said pulley to a flange
or rim on the driven pulley D when use of the power is desired, by a belt shifter (1
pivoted to the bracket or hanger A, said belt-shifter being operated by a treadle
rod or in any other suitable manner. To limit the movement of the belt-shifter
when the belt k is transferred to the driven pulley E the upper arm of the belt-
shifter may be provided with an adjustable stop-screw g arranged to engage a
projection a formed on the bracket or hanger A, the brake extending from the
belt-shifter and engaging a flange on the pulley D serving to limit the movement
of the shifter in when the belt is transferred to the pulley E. This form of my
invention may be employed either as an "under-driver' to be placed beneath a
work-bench or table or as an over-head counter
power-transmitter.
יי
"

page_text: From the construction of the parts as hereinbefore described.it will be apparent
that the oil by which the driving and driven pulleys are lubricated will be prevented
from escaping from the outer ends of their hubs, and any surplus oil which may
gather at the inner ends of said hubs will be returned by centrifugal action if the
parts are in motion or by gravity, if the parts are at rest to the oil cup B, one or
more annular grooves being preferably provided at the inner ends of the hubs of
the said pulleys to prevent the oil from creeping along the same.
Owing to the fact that the tapered chamber in the hub of the driven pulley D
is flared or grows larger toward the inner end of said hub centrifugal force will
tend to force the oil which may collect in said recess inward toward the oil cup if
the said pulley be in rotation, or the oil will naturally run down the inclined plane
formed by this flaring recess if the pulley be at rest and will thus be conveyed
back into the oil cup. It has been found in practice that with my improved power-
transmitter or driving-attachment constructed as hereinbefore described it is utterly
impossible for the surplus oil to escape or be thrown to the floor and the pulleys
may be run at any desired rate of speed and every particle of surplus oil will be
reliably returned to the oil cup.
"
To adapt my invention for use in what is known as an
upper driver" for
sewing machines, or a driver by which the power is transmitted directly from the
driven pulley to the pulley or wheel mounted directly on the shaft of the sewing
machine, I preferably form the oil cup and oil guard chamber as represented at
Figures 5 and 6 at the upper portion of a lever which serves as a support for the
chambered stud on which the clutch pulley is to run which lever is also preferably
provided with a brake to engage the driven pulley when the lever is operated to
release the driving pulley therefrom. The said lever is preferably mounted on
the arm or frame of the machine and thus moves therewith when the machine is
turned up on its hinges for access to the parts below the bed plate, and by thus
mounting the said lever or pulley support on the machine frame the driving
pulley is always concentric with the driven pulley so that the axes of the said
pulleys are always in alignment. To permit the machine to be turned up without
disconnecting the treadle connections with said lever the treadle rod joining said
connections is placed at the rear side of the under part of the work plate, closely
adjacent to the hinges of the latter. To prevent the oil in the oil cup from being
spilled when the machine is turned up said oil cup has an extension into which the
oil can run when the arm of the machine is inclined over backwards.
In this modification as shewn at Figures 5 and 6 A denotes a sewing machine,
which may be of any usual construction; and a is the driving shaft carrying the
fast fly wheel or pulley to which power is to be applied. Secure to some part
of the frame of the machine (as to the vertical portion of the arm of the machine)
is a small bracket e to which is pivotally attached a lever C provided at its upper
end with an oil cup e and with a support to which latter is attached a chambered
or hollow stud on which is mounted the driving pulley D. Above the oil cup el
is provided an oil guard chamber formed by a suitable housing. The chambered
stud d instead of being made in the form of a perforated sleeve may be simply a
solid stud having a groove to receive the oil conducting wick.
The outer face of the pulley is preferably provided with a recess in which is
placed a friction ring of leather or other suitable material against which the
driving pulley D is to be forced when the machine is to be set in motion.
Attached to the lower end of the lever C is a link e connected to an arm el¹ of a
transverse rock shaft E arranged beneath the forward end of the work plate of
the sewing machine, said arm having at the rear side of the sewing machine and
near the hinge thereof a second arm to which is attached a rod e³ which is to
run to a suitable treadle by which the lever can be operated to force the driving
pulley D into contact with the pulley when the machine is to be set in motion.
A suitable spring as the torsional spring on the rock-shaft E, will operate the
lever C to release the driving pulley D from the driven pulley when pressure
upon the treadle is relieved, the said lever being preferably provided with the
h

page_text: brake which when the pressure on the treadle is relieved, will come into contact
with the driven wheel to arrest the motion thereof.
By connecting the treadle rod to the shaft E at the rear side of the work plate
of the machine and near the hinges F by which said work plate attached to the
table or bench G the machine is adapted to be turned up on its hinges when access
to the underside thereof is desired without disconnecting the treadle rod e³.
The driven pulley D, running upon the chambered stud d, has its bub closed at
its outer end, as clearly shewn in Figure 5 while the opposite or open end of said
hub is extended into the guard chamber c and over the cup e and thus surplus oil
will be prevented from escaping from the outer end of the hub of said wheel; and
as it can only escape from the inner end of said hub it will be thrown off by
centrifugal action and returned by gravity to the oil cup, the oil thrown against
the walls of the oil guard chamber running down said walls into the oil
cup..
To prevent oil from creeping outward on the outer surface of the hub of the
wheel DI preferably provide the inner end of said hub (which is in the oil guard
chamber and over the oil cup) with one or more annular grooves/.
The oil cup c is preferably provided with an extension made in the form of a
segmental chamber within the upper end of the lever C, so that when the machine,
to which the said lever is attached is turned up on its hinges, for access to the parts
beneath the work plate, the oil from the oil-cup will rnn into said extension; ard
thus any danger of spilling the oil when the machine is thus turned up, will be
avoided.
While I have herein shewn my invention as applied to a friction clutch connec-
tion of the driving and driven pulleys it will be understood that the same may be
used with any other well-known form of clutch by which driving and driven pulleys
may be caused to be operatively engaged or with fast and loose pulleys and a belt
shifter.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed as communicated to ne
I declare that what I claim is :-
of a
1. A driving attachment or power transmitter comprising the combination with a
suitable hanger or bracket provided with an oil guard chamber and an oil cup
chambered stud supported by said bracket, a pulley having a hub one portion of
which extends into said oil guard chamber and over said oil cup, said pulley having
an oil guard chamber formed in its hub, and having also, extending outward from
said hub, a perforated sleeve and a second pulley mounted on said sleeve and having
one end of its hub extended within the oil guard chamber of the first named
pulley.
2. A driving attachment or power transmitter comprising the combination with
a suitable hanger or bracket provided with an oil guard chamber and an oil cup, of
a chambered stud supported by said bracket, a pulley having a hub one portion of
which extends into said oil guard chamber and over said oil cup said pulley having
a tapering oil guard chamber formed in its hub and having also, extending outward
from said hub, a perforated sleeve, and a second pulley mounted on said sleeve and
having one end of its hub extended within the oil guard chamber of the first namel
pulley, the portions of the hubs of said pulleys extending within said oil-guard
chambers being provided with exterior grooves.
3. A driving attachment or power transmitter comprising the combination with
a suitable support or bracket provided with an oil guard chamber, an oil cup and a
chambered stud of a pulley mounted upon the said stud and provided at its bub
with an oil guard chamber or flaring recess and with a perforated sleeve portion
the inner end of the hub of said pulley being extended into the said oil guard
chamber of said bracket and over the said oil cup, a second pulley mounted upor
the perforated sleeve portion of the first named pulley and the hub of which is
closed at one end while the other or inner end of said hub extends within the oi
guard chamber of the said first named pulley.

page_text: 4. A driving attachment or power transmitter comprising the combination with
a suitable support or bracket provided with an oil guard chamber, an oil cup and a
chambered stud, of a pulley having an oil guard chamber formed in its hub and
having one portion of the latter extended into the oil guard chamber of said
bracket and over said oil cup, said pulley having extending outward from its hub a
perforated sleeve, a second pulley mounted on said perforated sleeve and having
one end of its hub extended within the oil guard chamber formed in the hub of the
first named pulley and having the other end of its hub closed, an operating lever
pivoted at one end to the said support or bracket and having near its opposite cud
a projection by which the said pulleys may be forced into frictional contact with
each other, and having also, between its ends, a brake by which the movement of
the driven pulley may be arrested, and a spring by which the said brake may he
forced into contact with the driven pulley when said pulleys are released from
frictional pressure.
5. The combination with the support or bracket A provided with the oil guard
chamber, the oil cup B and the perforated sleeve or chambered stud C of the
driven pulley D mouited on said sleeve or stud and provided with a chambered
limb the inner end 3 of which extends into said chamber and over the said oil
cup, said pulley having also the perforated sleeve d', the driving pulley E mounted
on the said sleeve d¹ and having the inner end of its hub extended within the recess
or oil guard chamber of the driving pulley and the outer end of its hub closed,
the operating lever G by which said pulleys are forced into frictional contact with
each other and a spring by which said lever may be moved to release the frictional
contact of said pulleys.
6. The combination with the support or bracket A provided with the oil guard
chamber a', the oil cup B and the perforated sleeve or chambered stud C, of the
driven pulley D mounted on said sleeve or stud and provided with a chambered hub
the inner end of which extends into said oil guard chamber and over the said
oil cup, said pulley having also the perforated sleeve, the driving pulley E
mounted on the said sleeve and having the inner end of its hub extended within
the oil guard chamber of the driven pulley and the outer end of its lub closed,
the lever G pivoted to said support or bracket and provided with a projection g
which is to engage the closed end of the driving pulley and force it into frictional
contact with the driven pulley, and with the brake portion g3 which is to arrest the
movement of the driven pulley and the spring serving to lift said lever when the
treadle pressure therein is released.
7. The combination with the bracket A provided with the oil cup B, of the
driving and driven pulleys supported by said bracket, and the dress guard H
attached to the bottom of said oil cup and extending over the belt flange of the
said driven pulley.
8. In a sewing machine driving attachment, the combination with a pulley and a
chambered stud on which the same is mounted, to rotate freely thereon, of an oil
guard chamber and an oil cup from which latter, by a wick or other suitable
conductor, oil may be conveyed by capillary attraction to the pulley bearing
afforded by said stud, said pulley having a hub which is closed at one end and the
opposite end of which is extended into said oil guard chamber and over said
oil cup.
9. In a sewing machine driving attachment, the combination with an oil cup and an
oil guard chamber or housing of a driving pulley having a hub extending within said
chamber or housing and over said oil cup a pulley to be driven and a lever by
which said driving and driven pulleys may be caused to be operatively engaged with
each other.
10. In a sewing machine driving attachment, the combination with a support or
bracket on the frame of the machine, of a lever pivotally secured to said support
or bracket and provided at its upper end with an oil guard chamber and an oil cup,
a chambered stud secured to said lever, and a pulley loosely mounted so as to run
freely upon said stud and having a hub which is closed at one end and the

page_text: opposite end of which extends into said oil guard chamber and over the said
oil cup:
11. In a sewing machine driving attachment, the combination with a sewing
machine and with driving and driven pulleys, of a lever supported by the frame-
work of said machine and by which the said driven and driving pulleys are to be
forced into operative contact with each other, connections, extending beneath the
work-plate of the machine, by which the said lever is to be operated and a treadle
rod attached to said connections near the rear side of the work-plate of the
machine, and near the hinges by which the said work-plate is mounted on the
supporting table or bench.
12. The combination with a sewing machine, of a lever supported by the frame-
work thereof, and provided at its upper end with an oil guard chamber and an oil
cup, said oil cup being so shaped as to receive the oil and prevent the same from
spilling when the machine is turned up on its hinges, a chambered stud supported
by said lever, and a driving pulley mounted on said stud and having a hub which is
closed at one end and the other end of which extends within the said oil guard
chamber and over said oil cup.
13. The combination with a sewing machine, of the lever C supported by the
frame of the machine and carrying at its upper end a driving pulley by which power
may be transmitted to the shaft of the sewing machine, the rock shaft E having two
arms one of which is connected to the lower end of said lever, and to the other of
which the treadle rod is connected, the last named arm being located near the rear
side of the machine and adjacent to the hinges by which the latter is connected with
the bench or work table.
14. The combination with a sewing machine of the lever C supported by the
frame thereof and provided at its upper end with an oil guard chamber, an oil cup
and a chambered stud, the driving pulley D mounted on said stud and having the
outer end of its hub closed and the inner end of said hub extended within said oil
guard chamber and over said oil cup, the rock shaft E provided with the arms el
and, the latter arranged near the rear side of the work-plate of the machine the
link e connecting the lower end of the said lever with the said arm e¹ and the
treadle rodes connected to the said arm e².
Dated this 27th day of December 1893.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.