IMPROVEMENTS IN MULES FOR SPINNING AND DOUBLING
Year: 1863

page_text: LETTERS PATENT to John Dodd, of Oldham, in the County of Lancaster,
Mechanist, for the Invention of "IMPROVEMENTS IN MULES FOR SPINNING
AND DOUBLING."
Sealed the 19th April 1864, and dated the 21st October 1863.
PROVISIONAL SPECIFICATION left by the said John Dodd at the Office
of the Commissioners of Patents, with his Petition, on the 21st October
1863.
I, JOHN DODD, of Oldham, in the County of Lancaster, Mechanist, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN MULES
FOR SPINNING AND DOUBLING," to be as follows:-
My Invention relates, firstly, to a known method of giving the necessary
intermittent motion to the cam shaft. In this arrangement there is a clutch
box, one half of which is constantly driven by the motive power, communicating
motion through the medium of the other half to the cam shaft; but when
such motion is required to cease then the two parts separate. The two
portions of the clutch box are put out of gear by means. of a pin running
against a fixed incline, and thus far the arrangement is well known and forms
no part of my Invention. As an improvement upon this arrangement I adapt
a stop to the end of the said incline, and against which the pin arrives
whereby its correct position is determined. This stop, although forming at
times a continuation of the incline, is withdrawn by the "carriage" when the

page_text: part of the clutch box which imparts motion to the cam shaft is intended to
revolve.
Another part of my Invention also refers to a method of giving the
intermittent motion to the cam shaft. In this case I employ a clutch box in
two parts, as above described, and capable of being put in and out of gear
once in a revolution. To one portion of this clutch box I adapt a toothed
wheel taking into another mounted upon the cam shaft. These wheels.
contain unequal numbers of teeth, that upon the cam shaft having the greater
number; if it contain twice as many, then the cam shaft will make two changes
for two revolutions of the clutch box, or if it have three times as many, then
three changes for three revolutions of the clutch box, and so on for more if
desired. The two portions of my Invention above described may be
combined.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Dodd, in the Great Seal Patent Office on the 21st
April 1864.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
DODD, of Oldham, in the County of Lancaster, Mechanist, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-first day of October, in the year of our Lord
One thousand eight hundred and sixty-three, in the twenty-seventh year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said John Dodd, Her special license that I, the said John Dodd, my
executors, administrators, and assigns, or such others as I, the said John
Dodd, my executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter during the
term therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN MULES FOR
SPINNING AND DOUBLING," upon the condition, amongst others, that I, the said
John Dodd, by an instrument in writing under my hand and seal, should
particularly describe and ascertain the nature of the said Invention, and in
what manner the same was to be performed, and cause the same to be
filed in the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said John Dodd, do hereby declare the
nature of my said Invention, and in what manner the same is to be per-

page_text: formed, to be particularly described and ascertained in and by the following
statement and accompanying Drawings, that is to say :-
My Invention refers, firstly, to a known method of giving the necessary
intermittent motion to the cam shaft. In this known arrangement there is
a clutch box, one half of which is constantly driven by the motive power,
communicating motion through the medium of the other half to the cam
shaft; but when such motion is required to cease, then the two parts separate.
The two portions of the clutch box are put out of gear by a pin running
against a fixed incline, and thus far the arrangement is well known and forms
no part of my Invention. As an improvement upon this arrangement I adapt
a moveable stop to the end of the said incline, and against which the pin
arrives whereby its correct position is determined. This stop, although
forming at times a continuation of the incline, is withdrawn by the "carriage"
when that part of the clutch box which imparts motion to the cam shaft is
intended to revolve.
Another part of my Invention also refers to a method of giving the
intermittent motion to the cam shaft. In this case I employ a clutch box in
two parts, as above described, and capable of being put in and out of gear once
in a revolution. To one portion of this clutch box I adapt a toothed wheel
taking into another mounted upon the cam shaft; these wheels contain
unequal numbers of teeth, that upon the cam shaft having the greater
number; if it contain twice as many, then the cam shaft will make two changes
for two revolutions of the clutch box, or if it have three times as many, then
three changes for three revolutions of the clutch box, and so on for more if
desired.
The two portions of my Invention may be combined, and in the accom-
panying Drawing they are so shewn, Fig. 1 being an elevation thereof,. Fig. 2
a vertical section, and Fig. 3 a plan view of Fig. 2.
At a is a shaft provided with the usual friction cone 6, or it may be any
other shaft to which constant rotatory motion is communicated. Upon this
shaft is mounted one half c of a clutch box, and in such manner as to be
caused to revolve therewith, but capable of sliding upward and downward, a
groove and feather or other such ordinary connecting part being adapted.
This half clutch box is continually pressed downward by means of a spring d,
which has an abutment at the other end against a collar e fixed to the shaft a.
The other half of the clutch box is at f, formed upon a boss g, which is keyed
fast to a collar h turning loosely upon the shaft a, and carrying on its end
a bevil pinion . At i is a fixture constituting a bearing for the half f of the
clutch box through the medium of the collar h, and consequently therefore for

page_text: the shaft a. The boss 9 of the clutch box f is provided with an aperture. in
which is situate a pin capable of sliding therein. The upper end of this
pin when in the position shewn supports the half c of, the clutch box. against
the pressure of the spring d, and therefore prevents it from passing into gear
with the other half f, but if the said pin be at liberty to move downward, -as
hereafter to be described, then the spring d will bring the two halves of the
clutch box into gear. The lower end of the pin 7 when in the position shewn
rests upon the upper part of an incline m, which incline is a continuation of
a fixed incline m*, and is bounded by a projecting part n capable of being
moved at times, but constituting at other times a stationary stop for
registering the position of the pin l. The incline m and stop n are mounted
upon one area of a bell-crank lever o, p, capable of turning upon a centre at
7, and the arm o thereof is drawn upward by a spring r, so that the said. bell
crank lever o, p, incline m, and stop n have always a tendency to remain in
the position shewn in the Drawing. At s is a rod mounted so as to slide in
stationary guides, and provided with a tappet t. At w is a bevil wheel
taking into the pinion h and fixed to the shaft æ, which shaft is that ordinarily
called the cam shaft. The operation is as follows:-The shaft a, as before
stated, has continuous rotatory motion imparted to it by the motive power, 'and
the part of the clutch box runs therewith, as, however, the collar is loose
"pon
the shaft a, the bevil pinion and wheel w will remain stationary, and
during the above-mentioned rotation the part c'of the clutch will run upon
the pin Z, and thus the two portions c and f will be kept apart. Preparatory
to a required "change" the carriage advances towards the tappet t, and any
convenient part on the said carriage arrives in contact with a stud on the rod
s, and the said rod s, together with the tappet t, will be slidden forward. until
the latter arrives in contact with a roller y upon the end of the lever o; the
roller y will thus become depressed and the bell-crank lever o, p, will be
caused to turn upon the centre q, by which means the incline m and stop n
will be turned outward away from the. pin l, and as the said pin will therefore
be no longer supported in the position shewn the spring d will be at liberty to
force it downward and bring the two halves c, f, of the clutch box into gear.
The pinion k will now therefore be locked to the shaft a, and thus the motive
power will be communicated through the wheel w to the "cam" shaft x, and
a "change" will be effected, as is well understood. Immediately after the
clutch box has been put into gear and the pin 7 has been carried onward, the
tappet t will have passed the roller y, and the spring will draw the levers
o, p, into the position shewn, thus bringing the incline m within the plane of
rotation of the pin l, which will by the said rotation arrive against the incline

page_text: and by running up it will project itself upward so as to thrust the part c of
the clutch box out of gear with the other part thereof, and thus the motion of
the cam shaft will be arrested. The return motion of the levers o, p, will
bave brought the stop n as well as the incline to the position shewn; when
therefore the pin runs upward on the incline, and when it has separated the
two parts of the clutch box, the said stop n prevents any motion of the pin by
impetus, and acts so as to secure a registering or starting point. When
another change is required the tappet t is again brought against the roller y
and the movements above described are repeated.
In the arrangement shewn in the Drawing it is supposed that two changes
of the cam shaft are required. The pinion h has half as many teeth as there
are in the wheel w, consequently one revolution of the clutch box will cause.
the cam shaft to turn half round, and one change will be effected, then another
revolution of the said clutch box will effect another half revolution of the
cam shaft, and a second change will take place. In like manner if three
changes be required the wheel w will be provided with three times as many
teeth as the pinion h, and the cam shaft will be divided into three parts, each
of them requiring one revolution of the clutch box, and so on for any other
number.
I claim as my Invention, firstly, the use of an incline acting in conjunction
with a moveable stop for determining the motion of the pin l.
Secondly, the employment of wheels of unequal numbers of teeth for
communicating motion from the clutch box to the cam shaft, whereby each
revolution of the said clutch box produces a change.
In witness whereof, I, the said John Dodd, have hereunto set my hand
and seal, this Nineteenth day of April, in the year of our Lord One
thousand eight hundred and sixty-four.