Improvements in or relating to Stop Motions and Brakes for Sewing and other Machines.
Year: 1893

page_text: Date of Application, 25th June, 1893
Complete Specification Left, 13th Mar., 1894-Accepted, 12th May, 1894
PROVISIONAL SPECIFICATION.
Improvements in or relating to Stop Motions and Brakes for Sewing
and other Machines.
I, DONALD NOBLE, of the Firm of Messieurs Noble, Brown, and Company, of
The Nobro Works, Little Queen Street, Leeds, in the County of York, Engineers,
do hereby declare the nature of this invention to be as follows:-
This invention, whilst particularly applicable to sewing machines employed for
flowering, flossing, and fanning may also be applied to other machines where a
given portion, say for instance, the main driving shaft, of the machine is required
to be stopped, after making say one revolution, in a given position.
In order to give an illustration of the application of my invention, I will describe
it applied to a sewing machine for performing the operation of flowering, flossing
or fanning.
On the main driving shaft are mounted a driving pulley and a plate or disc in
which is cut or formed a recessed cam. The greater portion of the path of the
cam is concentric with the driving shaft, but an indent is provided therein for
purposes hereinafter described. The driving pulley is arranged to run loosely on
the driving shaft, whilst the cam plate is keyed or otherwise fixed thereon.
Provision is made for actuating the cam plate and driving shaft by means of the
frictional contact of the cam plate with the driving pulley. Any suitable form of
frictional device may be employed for the purpose.
The
To the standard or framework of the machine may be secured a stud, either
directly or by any suitable means such as a fixing. The axis of the stud is
preferably below that of the driving shaft, but parallel with it. On the stud is
mounted a boss provided with two projecting arms of varying lengths.
longest projecting arm is arranged to act upon the outer end of the boss (which is
slightly spherical) of the driving pulley. The free end of this arm may be
arranged at an angle and armed with an adjustable incline or spring and set screw.
Whilst the shorter projecting arm is arranged to work between the inner face of
the cam plate and the standard or framework of the machine, and it is armed with
a runner which works in the recessed cam of the cam plate. To the shorter
projecting arm is also attached a lever provided with a slot hole near its free end,
and which engages with say a pin fixed to a second or treadle lever. The second
or treadle lever may be pivoted, at or about its centre, to the said framework or
fixing. A spring of suitable construction is employed for keeping the two said
projecting arms to their work or in position.
Around the periphery of the cam plate is placed a flexible band of any suitable
width, thickness, and metal such as brass or steel and lined if desired with leather,
cardboard, or the like. The ends of the flexible metallic band are attached to the
aforesaid boss, carrying the projecting arms, in such a manner that when the runner
enters the concentric path of the cam the band will be freed from its contact with
the periphery of the cam plate, but as soon as the runner enters the indent of the
cam for stopping the machine the flexible metallic band is tightened thereon to
form a brake.
At the same time that the runner is raised or lifted out of the indent of the cam,
by the treadle lever and slotted lever, the inclined end of the longest projecting
arm is brought into contact with the spherical end of the boss of the driving pulley
which forces the latter into frictional contract with the cam plate thereby imparting
motion to the driving shaft. But as soon as the runner enters the indent the

page_text: inclined end of the projecting arm is withdrawn from the boss of the driving pulley
which releases its contact with the cam plate, and by tightening of the flexible
metallic band thereon the driving shaft is stopped in one given position.
The above described mechanism may be applied to other machines than sewing
machines, and when applied to the latter class of machines the vibrating lever and
presser foot may be actuated by a cam fixed to the inner face of the cam plate
through a runner mounted on a lever suitably pivoted to the said fixing or frame-
work of the machine. When the vibrating lever is so actuated it is arranged that
the presser foot shall be in a raised position whenever the machine is stopped.
Dated the Twenty-seventh day of June 1893.
COM DELE STECIFICATION.
Improvements in or relating to Stop Motions and Brakes for Sewing
and other Machines.
I, DONALD NOBLE, late of the Firm of Messieurs Noble, Brown, and Company,
of The Nobro Works, Little Queen Street, Leeds, in the County of York,
Engineers, but now residing at 24 Queen's Square, Leeds aforesaid, do hereby
declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
66
This invention, whilst particularly applicable to sewing machines employed for
"flowering,' flossing," and " fanning," may also be applied to other machines
where a given portion, say for instance, the inain driving shaft of the machine is
required to be stopped, after making, say one or more revolutions in a given
position.
66
flowering,"
In order to give an illustration of the application of my invention, I will describe
it applied to a sewing machine for performing the operation of
flossing," or " fanning," hereafter termed "flossing."
€6
In the drawings hereunto annexed:-
Figs. 1, 2, and 3 are respectively a side elevation, an end elevation, and a plan
looking at the top of an outline of a Wheeler and Wilson No. 12 sewing machine
with my invention applied.
Figs. 4 and 5 are respectively an enlarged sectional elevation and an end
elevation, drawn at the opposite end to Fig. 2, of stop motion and brake constructed
according to this invention, but removed from the sewing machine.
Figs. 6 and 7 are respectively an enlarged side and end elevation of project ng
arms and brake.
Figs. 8 and 9 are respectively enlarged sectional and end elevations of cam plate
drawn on the opposite side to Fig. 5.
Figs. 10 and 11 are an enlarged elevation and plan of treadle lever.
Like parts in all the views are marked with the same letters of reference.
A is the framework, B the table, C the needle bar, D the vibrating lever for
actuating the presser foot, and E the main driving shaft of the machine, all of which
may be of a similar construction to that usually employed on a No. 12 Wheeler and
Wilson sewing machine.
The vibrating lever D may be mounted upon a pin or stud d which is carried
by the fixing secured to the framework A as shown. The means for operating
the vibrating lever D will be hereafter described.
On the main driving shaft E are mounted a driving pulley F and a circular
plate or disc G in which is cut or formed a cam g. The greater portion of the path
of the cam g is concentric with the driving shaft E, but an indent g¹ is provided
therein for purposes hereinafter described. The driving pulley F may be arranged
to run loosely on the driving shaft E, but I prefer arranging it to run loosely on

page_text: the boss g* of the circular cam plate G as shown; whilst the cam plate G is keyed
or otherwise fixed thereon, as for instance by screws as shown at Fig. 9. The
cam plate G is driven by frictional contact with the driving pulley. Any suitable
form of frictional device may be employed for the purpose. In the drawings I
have shown a ring of leather for its equivalent pressed into a groove or recess
formed on the inner face of the driving pulley. The face of the leather ring ƒ is
made to work against a ring of cardboard g* fixed within the cam plate G as shown
at Figs. 8 and 9. The outer end of the driving pulley may be made spherical or
armed with a spherical ended plug f' made of wood or other suitable material
arranged to be driven into the boss or hub of the driving pulley as shown.
To the standard or framework of the machine may be secured a stud H either
directly or by any suitable means such as a fixing as shown at H¹. The axis of
the stud H is arranged preferably below that of the driving shaft and on one side of
it but parallel with it. On the stud H is mounted a boss I provided with two
projecting arms I, I, of different lengths. The longest projecting arm I¹ is
arranged to act upon the outer end of the spherical plug of the driving pulley.
The free end of this arm may be arranged at an angle as shown and it is armed with
an incline J which may be in the form of a spring capable of adjustment by a set
screw j. Whilst the shorter projecting arm I' is arranged to work between the
inner face of the circular cam plate G and the standard or framework A of the
machine, and it is armed with a runner which works in the recess of the cam
plate G and against or upon the periphery of the cam g. To the shorter projecting
arm I is also secured by a stud K* a link K provided with a slot hole K¹ near its
free end, and which engages with say a pin I fixed to a second or treadle lever L.
The second or treadle lever L may be pivoted at or about its centre to the said
framework or fixing H¹. A spring M of suitable construction, say coiled as shown,
is employed for keeping the two said projecting arms to their work or in position.
Around the periphery of the circular cam plate G is placed a flexible band N of
any suitable width, thickness, and metal, such as brass or steel, and lined if desired
with leather, cardboard, or the like at N¹. The end N of the flexible metallic
band N is attached by, say, a loop and pin to the aforesaid boss I, whilst the
opposite end N3 of the band may be secured, say by a loop and pin, to a link O
which is jointed to the boss I as shown at O' Fig. 7. The tension of the band N
may be regulated by the adjustment of the link O by means of the screw O'.
When the runner is raised by the link K and lever L out of the indent gl on to
the concentric path of the cam g the band will be freed from its contact with the
periphery of the cam plate G; but as soon as the runner i again enters the
indent g of the cam the flexible metallic band is tightened thereon, thereby forming
a brake which immediately stops the machine with the needle and presser foot
raised.
At the same time that the runner i is raised or lifted out of the indent g¹, of the
cam g, by the treadle lever L and slotted link K the incline J on the end of the
longest projecting arm I is brought into contact with the spherical end f¹ of
the boss of the driving pulley which forces the latter into frictional contact with
the cam plate thereby imparting motion to the driving shaft. But as soon as the
runner again enters the indent, the incline on the end of the projecting arm is
withdrawn from the boss of the driving pulley thereby releasing its contact with
the cam plate G and by the tightening of the flexible metallic band thereon the
driving shaft is stopped in a given or predetermined position. By arranging for the
adjustment of the incline J and link O the driving pulley F and brake N may be
finely and accurately adjusted. The vibrating lever D and presser foot may be
actuated by a cam P fixed or cast to the inner face of the cam g through a runner Q
mounted on a lever R which is pivoted at r to the fixing H', or framework of the
machine, and connected to the vibrating lever by a suitable adjustable screw or link S,
with a helical spring S' interposed between the two levers D and R. When the
vibrating lever is so actuated it is arranged that the presser foot shall be in a raised
position whenever the machine is stopped.

page_text: The above described mechanism may be applied to other machines (besides sewing
machines), such as for instance eyeletting or button hole machines or any machine
requiring its moving parts to be stopped in a given position.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
-claim is :
1. The arrangement and combination of cams on circular plate, driving pulley,
levers, runners, and metallic brake band, with the main driving shaft of a sewing
or other machine substantially as herein before described by means of which the
main driving shaft of the machine may make one or more revolutions according to
the work operated upon and then be automatically stopped in a predetermined
position.
2. The arrangement and combination of parts substantially as herein before
described by means of which the rotation of the driving shaft of the machine may
be automatically stopped in a given position, that is to say, the combination of the
circular cam plate G mounted and fixed on the driving shaft of the machine, a
driving pulley F running loosely on said shaft or on the hub of the cam plate,
levers II, arranged respectively to press the driving pulley into frictional contact
with the cam plate at the same time that the tension of the brake N is released and
the runner i raised by jointed and slotted link K and lever L out of the indent of
the cam G and a spring M for returning the runner into the indent for stopping the
machine.
3. The application to and combination with the main driving shaft E and
vibrating lever D of a sewing machine of the driving pulley F, circular cain
plate G, cams g and P, fixing H', levers 1' 13, L and R, link K runners i and Q
brake N and means for connecting it to lever I all arranged as and for the purposes
herein set forth.
4. In a stop motion and brake substantially such as herein described and
illustrated, the double lever having an adjustable incline provided on one of its
arms and a runner upon the other arm in combination with the means described for
bringing it in and out of action as and for the purposes set forth.
5. In a stop motion and brake substantially such as herein described and
illustrated the combination with a lever having two arms such as 11 12 with a
metallic brake band such as N connected to said double armed lever by means of
loops, pins, and an adjustable link O and adjusting screw O' and means as described
for bringing the lever in and out of action as and for the purposes set forth.
Dated the Second day of March 1894.
DONALD NOBLE.