AN IMPROVED FRICTION DEVICE FOR SECURING CARPET LOOMS AND OTHER MACHINES AGAINST BREAKAGE
Year: 1883

page_text: LETTERS PATENT to Thomas Hardcastle of Kidderminster in the County of
Worcester for an İnvention of AN IMPROVED FRICTION DEVICE FOR SECURING
CARPET LOOMS AND OTHER MACHINES AGAINST BREAKAGE
PROVISIONAL SPECIFICATION left by the said Thomas Hardcastle at the
Office of the Commissioners of Patents on the 3rd January 1883.
THOMAS HARDCASTLE of Kidderminster in the County of Worcester "AN
IMPROVED FRICTION DEVICE FOR SECURING CARPET LOOMS AND OTHER MACHINES
AGAINST BREAKAGE
"
My invention is for the purpose of preventing the breakage of carpet looms and
other machines by the introduction of an improved device which has the effect of
measuring out the amount of power which may be transmitted to the said machine
from the Engine or other driving medium, and is constructed as follows:-
-
I hore a taper hole in the boss or nave of the driving wheel of any given
machine sufficiently larger than the shaft at its smallest diameter to allow of a
taper bush being keyed upon the shaft the outside of which nicely fits inside the
hole in the wheel. This bush is longer than the depth of the buss to allow of a
double nut (or lock nuts) being screwed outside its smaller end, each of these nuts
being provided with holes or sluts to receive a suitable tool for tightening up the
nuts against the face of the wheel so as to bind the taper or conical bush inside
the nave of the wheel sufficiently to just drive the machine and to overcome the
work required. Should there however be any exceptional strain brought to bear
upon the machine such as would break a shaft or wheel the conical bush would
slip round inside the nave or boss of the said wheel and prevent any such accident.
Considerable inconvenience and loss of time is occasioned by such breakages which
my invention is designed to prevent.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Thomas Hardcastle in the Great Seal Patent Office on the
3rd July 1883.
"AN
THOMAS HARDCASTLE of Kidderminster in the County of Worcester.
IMPROVED FRICTION DEVICE FOR SECURING CARPET LOOMS AND OTHER MACHINES
AGAINST BREakage”
My invention is for the purpose of preventing the breakage of carpet looms and
other machines by the introduction of an improved device which has the effect of
measuring out the amount of power which may be transmitted to the said machine
from the Engine or other driving medium and is constructed as follows:-
I bore a taper hole in the boss or nave of the driving wheel of any given
macliine sufficiently larger than the shaft at its smallest diameter to allow of a
taper bush being keyed upon the shaft the outside of which nicely fits inside the
hole in the wheel. This bush is longer than the depth of the boss to allow of a
double nut, or lock nut, or equivalent being screwed outside its smaller end each
of these nuts being provided with holes or slots to receive a suitable tool for
tightening up the nuts against the face of the wheel so as to bind the taper or
conical bush inside the nave of the wheel sufficiently to just drive the machine and
to overcome the work required Should there however be any exceptional strain
brought to bear upon the machine such as would break a shaft or wheel the conical
bush would slip round inside the nave or boss of the said wheel and prevent any
such accident
Considerable inconvenience and loss of time is occasioned by such breakages
which my invention is designed to prevent.
In order that my invention may be more distinctly understood and more easily
carried into practice I have appended hereunto a sheet of drawings showing three
modifications of working the same out in practice
Figure is a part section and part elevation of a wheel broken off through two
arms showing my device in section. The shaft C upon which the friction device B
is keyed is shown in elevation the key F making the taper bush B practically one
with the shaft C so far as effect in working is concerned. The hoss of the wheel A
is bored out so as to nicely fit the outer part of the bush B. The pair of nuts D
and E are screwed on to the small end and have the effect of keeping the wheel
in its proper position on the bush B and by slightly tightening these nuts the
friction produced upon the bush B is increased. Should any extreine pressure be
brought to bear upon the wheel A it slips around the bush friction device B.
A similar modification is shown by Figure 2 where the collar H is secured to
the bush N by screw pins or other means K after the wheel is passed on to the
bush. Two three or more set pins M are then screwed up against the loose
washer P which presses against the wheel R forcing it on to the friction device N
with similar effect to that explained for the before mentioned modification
Figure 1.
Figure 3 is the third modification and it differs from the other two principally
from the fact that the tightening medium is fixed at the large end of the friction
device S. In this modification the ring W is practically fast with the wheel T so
that when the wheel T turns on the bush S under extra strain the ring W is carried
round by the studs u of which there may be two three or more tapped into the
wheel T the nuts y serving to tighten the wheel upon the friction device S. Thus
the ring W is made to work loosely upon the recessed part s' of the device S. Of

page_text: course various other slight modifications in the details of these three plans illus-
trated will suggest themselves to practical men but the main idea of the friction
device will be otherwise perfectly understond.
Having now described my said invention of an improved friction device for
securing carpet looms and other machine against breakage and the manner of
carrying the same into practical effect I would have it understood that I do not
confine myself to the exact details herein set forth as they may be considerably
varied without without departure from the principle of the invention itself but
what I do claim is:-
First-The friction device herein set forth consisting of a tapered bush fitting
inside the nave or boss of a wheel in combination with the set collars or nuts
substantially as herein setforth.
Second-The friction device shown upon the accompanying drawings.
•
In witness whereof I the said Thomas Hardcastle have hereunto set my
hand and seal this twenty eighth day of June in the year of our Lord
one thousand eight hundred and eighty three