IMPROVEMENTS IN THROSTLE FRAMES
Year: 1876

page_text: LETTERS PATENT to John Clayton Mewburn, of 169, Fleet Street, in the City
of London, Patent Agent and Consulting Engineer, for the Invention of
"IMPROVEMENTS IN THROSTLE FRAMES." A communication from abroad by
François Josse Wackernie, Julien Edmond Marie Joseph Mourmant, and
Florimond Joseph Tonnel, all of Lille, France.
PROVISIONAL SPECIFICATION left by the said John Clayton Mewburn at the
Office of the Commissioners of Patents on the 24th July 1876.
JOHN CLAYTON MEWBURN, of 169, Fleet Street, in the City of London, Patent
Agent and Consulting Engineer. "IMPROVEMENTS IN THROSTLE FRAMES."
This Invention consists in regulating the tension of the friction cord of the
bobbins in throstle frames by means of apparatus arranged as about to be described.
Upon the drawing roller is keyed an endless screw which imparts rotation by
means of a screw wheel to a vertical shaft. At the lower end of this shaft another
endless screw is mounted, which is free to slide along the shaft, but turns with it,
owing to a groove which is formed therein. This second screw turns a pinion
keyed on a small horizontal shaft; on this shaft is mounted. a third endless screw
which likewise slides in a groove, and which gears with a rack. It will be readily
understood that the rotation of the drawing roller produces through the screws and
pinions a horizontal displacement of the rack.
The rack is connected to a bar which can slide along a table where the bobbins
are placed. In front of each bobbin two notches are formed in the bar. The
friction cord is placed in the one or the other of these notches, according as greater
or less friction is desired.
At the commencement of the formation of the bobbin the bar is at its extremé
position at the right, which gives the minimum friction. The organs of displace-
ment, that is to say, the screws and pinions, are calculated so that when the bobbin
is full the bar is carried to its limit at the left corresponding to the maximum
friction which the spinning theoretically requires.
In order to return the bar readily to its first position or point of departure for
the commencement of each bobbin a forked guide is lifted, which allows the
horizontal shaft to be pushed from left to right, so as to throw its pinión out of gear
".

page_text: with the corresponding endless screw. By means of a handle on the horizontal
shaft the rack is returned to its point of departure; the pinion is then again put
into gear with its screw, the forked guide is lowered, and the spinning recommences.
The whole apparatus is mounted on a bracket or support which follows the up-
and-down movement of the lifting rail.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Clayton Mewburn in the Great Seal Patent Office on the 19th
January 1877.
"
JOHN CLAYTON, MEWBURN, of 169, Fleet Street, in the City of London, Patent
Agent and Consulting Engineer. IMPROVEMENTS IN THROSTLE FRAMES." A. com-
munication from abroad by François Josse Wackernie, Julien Edmond Marie Joseph
Mourmant, and Florimond Joseph Tonnel, all of Lille, France.
This Invention consists in regulating the tension of the friction cord of the
bobbins in throstle frames by means of apparatus arranged as about to be described.
Figure 1 is a front view, Figure 2 a side view, and Figure 3 a plan of the
apparatus. Upon the drawing roller A is keyed an endless screw B, which imparts
rotation by means of a screw wheel C to a vertical shaft E. At the lower end of
this shaft another endless screw H is mounted which is free to slide on the shaft E
but turns with it, owing to a groove E¹ which is formed therein. The endless screw
H turns a pinion I keyed on a small horizontal shaft J; on this shaft is mounted a
third endless screw K, which likewise slides in a groove and which gears with a
rack L. It will be readily understood that the rotation of the drawing roller A
produces through the screws and pinions a horizontal displacement of the rack L.
The rack is connected to a bar T, which can slide along a table T', where the
bobbins Y are placed. In front of each bobbin two notches are formed in the bar T.
The friction cord is placed in the one or the other of these notches, according as
greater or less friction is desired.
At the commencement of the formation of the bobbin the bar T is at its extreme
position at the right, which gives the minimum friction. The organs of displace-
ment, that is to say, the screws and pinions, are calculated so that when the bobbin
is full the bar T is carried to its limit at the left corresponding to the maximum
friction which the spinning theoretically requires.
In order to return the bar T readily to its first position or point of departure for
the commencement of cach bobbin a forked guide Q is lifted, which allows the
horizontal shaft J to be pushed from left to right, so as to throw its pinion I out of
gear with the endless screw H. By means of a handle on the horizontal shaft at O
the rack is returned to its point of departure, the pinion I is then again put into
gear with the screw, the forked guide is lowered, and the spinning recommences.
The whole apparatus is mounted on a bracket or support R which follows the
up-and-down movement of the lifting rail.
And having now described the nature of the said Invention, and in what
inanner the same is to be performed, I declare that I claim, constructing or providing
throstle frames with regulating apparatus arranged and acting substantially as and
for the purpose herein-before described and represented in the accompanying
Drawings.
In witness whereof, I, the said John Clayton Mewburn have hereunto set my
hand and seal, this Thirteenth day of January, One thousand eight hundred
and seventy-seven,
J. C. MEWBURN. (L.S.)