AN IMPROVED APPLIANCE FOR PREVENTING THE UNEQUAL WEAR OF THE LEATHERS OF DRAWING OFF ROLLERS OF COMBING MACHINES
Year: 1885

page_text: специал VY DUT
the Leathers of Drawing off Rollers of Combing Machines.
We WILLIAM HORSFALL GREENWOOD, Commission Wool Comber, and FREDERICK
FARRAR, Manager both of Upper Castle Street, Bradford, in the County of York
do hereby declare the nature of our invention for AN IMPROVED APPLIANCE FOR
PREVENTING THE UNEQUAL WEAR OF THE LEATHERS OF DRAWING OFF ROLLERS
OF COMBING MACHINES to be as follows:-
"
Our invention relates to an improved appliance applicable to Noble's, and other
combing machines in which the leathers of the drawing off rollers are traversed by
means of excentrics, fitted on a cross shaft under the revolving circular rack, such
excentrics imparting a reciprocating motion to the slide brackets carrying the
runners," or guide rollers of the leathers. Hitherto the excentrics have been
driven at a regular speed generally by means of a ratchet wheel fixed on the end
of the excentric shaft, the pawl which drives it being worked by studs or projections
fixed on the underside of the circular revolving rack; therefore the traverse of the
slide brackets was not regular, they attained a maximum speed when the excentrics
were at half stroke and a minimum speed at the commencement and termination
of each stroke, this caused the unequal wear of the leathers which to produce good
work had often to be replaced by new ones, but by our improvements we impart
a more regular traverse to the leathers which consequently are more evenly worn,
and therefore kept in working order considerably longer than heretofore.
To carry out our invention we fix on the excentric shaft, preferably at the
opposite end to the ratchet wheel a metallic disc, opposite segments of the periphery
of which are cut with ratchet teeth; by the side of the metallic disc a pendant
lever is suspended, which carries a pawl resting on the periphery of the metallic
disc and gearing in the ratchet teeth cut in opposite segments of such metallic disc
each time the slide brackets approach their minimum speed. The herein before
mentioned studs or projections on the underside of the revolving circular rack come
in contact with and oscillate the pendant lever, and thereby impart a backwards
and forwards motion to the pawl which it carries; thus each time the slide brackets
approach their minimum speed the pawl carried by the pendant lever gears into
the teeth cut in one of the opposite segments of the metallic disc, and at each
oscillation of the pendant lever accelerates the speed of the excentric shaft, thereby
imparting a more uniform or regular traverse to the leathers than heretofore.
Dated L
TL 100-
DRACUP & NOWELL,
The Bradford Patent Office,
Agents for the Applicants,

page_text: An Improved Appliance for Preventing the Unequal Wear of
the Leathers of Drawing off Rollers of Combing Machines.
We WILLIAM HORSFALL GREENWOOD, Commission Wool Comber, and FREDERICK
FARRAR, Manager, both of Upper Castle Street, Bradford, in the County of York
do hereby declare the nature of our invention for AN IMPROVED APPLIANCE FOR
PREVENTING THE UNEQUAL WEAR OF THE LEATHERS OF DRAWING OFF ROLLERS
OF COMBING MACHINES and in what manner the same is. to be performed, to
be particularly described and ascertained in and by the following statement:—
"
"
Our invention consists in an improved device for regulating the speed of the
traverse of the leathers of the drawing off rollers of Nobles and other combing
machines in which such leathers are traversed by means of eccentrics fitted on a
cross shaft under the revolving circular rack, which eccentrics impart a recipro-
cating motion to the slide brackets carrying the runners or guides for the
leathers. Hitherto the eccentrics have been driven at a regular speed, generally
by means of a ratchet wheel fixed on the end of the eccentric shaft, the pawl whicu
drives it being mounted ou one arm of an L shaped lever, the other arm of which is
actuated by projections on the underside of the flange of the circular revolving
rack; thus an irregular stroke or traverse was communicated to the slide brackets,
as they attained a maximum speed when the eccentrics were at half stroke and a
minimum speed at the commencement and termination of each stroke. This
irregularity in the stroke of the slide brackets and corresponding irregularity in
the traverse of the leathers, caused such leathers to wear unequally and therefore
work imperfectly.
By our improvements we impart a more regular stroke to the slide brackets and
consequently a more regular traverse is imparted to the leathers which are there-
fore more evenly worn, and maintained in working order considerably longer than
beretofore.
Reference is to be had to the accompanying drawings forming part of this
specification in which similar letters of reference indicate corresponding parts in
all the figures.
Figure 1 is a plan of the circular revolving rack, the steam chest and slide
brackets of a Nobles combing machine together with the ordinary mechanism for
actuating such slide brackets in conjunction with our improvements.
Figure 2 is a side elevation and Figure 3 a sectional elevation of the same.
To carry out our invention we fix on the eccentric shaft A at the opposite end
to the ratchet-wheel B, by which means the shaft is rotated, a metallic disc C
opposite segments of the periphery of which are cut with ratchet teeth D; by the
side of the disc C a pendant lever E is mounted on the bracket F fixed to the steam
chest G. The inclined adjustable tappets, or projections H fitted under the flange
of the revolving circular rack J, come alternately in contact with the top of and
impart an oscillating motion to the pendant lever E and the pawl N mounted
thereon receives a reciprocating motion, thus as the metallic disc C revolves each
time the eccentrics K. approach the end of their stroke, and the slide brackets L

page_text: their minimum speed, the pawl H. engages with and gears into the teeth D and
accelerates the speed of the disc C, the shaft A and the eccentrics K, and there-
fore accelerates the speed of the slide brackets L, carrying the rollers or guides for
the leathers, and thereby communicating a more regular traverse to such leathers.
Having now particularly described and ascertained the nature of our inven-
tion and in what manner the same is to be performed, we declare what we
claim is
The disc C opposite segments of which are cut with ratchet teeth D, the pawl N
gearing therein and the pendant lever E, with the method of operating the same
substantially as herein described and for the purpose set forth.
DRACUP & NOWELL,
Agents for the Applicants.