IMPROVEMENTS IN DRIVING ONE OF A PAIR OF ROLLS FROM THE OTHER, APPLICABLE ESPECIALLY FOR DRIVING THE PRESS ROLLER IN A SIZING OR TAPE MACHINE
Year: 1884

page_text: I, JOHN WHITHAM BRETHERICK, of Bowling Green Iron Works, Darwen, in the
County of Lancaster, Engineer, do hereby declare the nature of my said invention
for "IMPROVEMENTS IN DRIVING ONE OF A PAIR OF ROLLS FROM THE OTHER,
APPLICABLE ESPECIALLY FOR DRIVING THE PRESS ROLLER IN A SIZING OR TAPE
MACHINE" to be as follows:-
This invention is designed for the purpose of taking some of the dragging strain
off the lower roller in those cases where at present the upper roller is driven solely
by friction against the lower roll, or against the material passing between them, and
regulating the amount of relief at pleasure-from an entire cessation of dragging
strain to allowing the full strain. I will describe it as applied to the sizing
machine, merely adding that wherever used the arrangement is substantially
similar,
The upper or press roller consists of a heavy cast iron roller covered with
flannel, and resting upon a copper roller revolving underneath it in the size-box
and is at present usually driven by contact with the revolving copper roller, a
method which causes extra drag upon the flannel cover and increased strain on the
driving shaft of the copper roller.
By my invention I fix upon the projecting end of the shaft of the copper roller a
spur wheel and mitre wheel combined: the mitre wheel gears into a corresponding
mitro wheel on the main driving shaft which is affixed to the outer frame of the
size box at right angles to the roller shafts and thus rotate the copper roller. Upon
the projecting end of the press roller shaft a bush is fastened upon which a spur
wheel revolves, which gears into the spur gearing of the combined spur-and-mitre
wheel aforesaid, fixed upon the driving shaft of the copper roller. The bush has a
friction plate attached to it on the side nearest to the press roller. Another loose
friction plate slides on a key on the outer end of the bush. Beyond this second
plate the bush is threaded, and a suitable wheel, nut, or handle, screws upon it for
the purpose of regulating the amount of pressure upon the loose spur wheel, which
revolves freely between the fixed and sliding friction plates, until the handlo
aforesaid is screwed up sufficiently to cause the friction plates to grip the spur
wheel with sufficient pressure to carry them round with it, thus rotating the shaft
and the press roller thereon. The spur wheel must be turned so as to revolve
perfectly true, and between it and each friction plate I place a washer of wood,
Hannel, or other suitable material to increase the efficiency of the arrangement.

page_text: COMPLETE DE LUIFICATION.
L
I, JOHN WHITHAM BRETHERICK, of Bowling Green Iron Works, Darwen, in the
County of Lancaster, Engineer, do hereby declaro the nature of my said invention
for "IMPROVEMENTS IN DRIVING ONE OF A PAIR OF ROLIS FROM THE OTHER,
APPLICABLE ESPECIALLY FOR DRIVING THE PRESS ROLLER IN A SIZING OR TAPE
MACHINE," and in what manner the saine is to be performed, to be particularly
described and ascertained in and by the following statement:-
This invention is designed for the purpose of taking some of the dragging strain
off the lower roller in those cases where at present the upper roller is driven solely
by friction against the lower roll,-or-against-tho-material-passing-between-them,
and of regulating-the-amount-of-relief,-at-pleasure-from-an-entire cessation of
dragging strain to allowing the full strain.
It is best described by aid of the accompanying drawings of the invention, as
applied to a sizing machine, in which Figure 1 is a part front elevation and
Figure 2 an end elevation of same parts.
In-these-A-is-the-upper-or-press roller consisting of a heavy cast iron roller
covered with flannel and resting upon a copper roller B revolving underneath. it in
the size-box. Roller A is at present usually driven by contact with the revolving
copper roller B, a method which causes extra drag upon the flannel-cover-and-
increased strain on the driving shaft of the copper roller D.
By my invention I fix upon the projecting end D of the shaft of the copper
roller a spur wheel E and mitro wheel F combined: the mitre wheel gears into a
corresponding mitre wheel G on the main driving shaft H which is affixed to the
outer frame of the size box at right angles to the roller shafts and thus rotate the
copper roller B. Upon the projecting end of the press roller shaft I a bush J is
fastened, upon which a spur wheel K revolves, which gears into the spur wheel E.
The bush J has a friction plate L attached to it on the side nearest to the press
roller A. Another loose friction plate L¹ slides on a key or set screw head M on
the outer end of the bush J. Beyond this second plate the bush is threaded, and a
suitable wheel, nut or handle N screws upon it for the purpose of regulating the
amount of pressure upon the loose spur wheel K, which revolves freely between the
fixed and sliding friction plates L L until the handle N is screwed up sufficiently
to cause the friction plates to grip the spur wheel with sufficient pressure to carry
them round with it, thus rotating the shaft I and the press roller A thereon. The
spur wheel K must be turned so as to revolve perfectly true, and between it and
each friction plate I place a washer P P of wood, flannel, or other suitable material
to increase the efficiency of the arrangement.
I sometimes prefer to gear the two rolls together in such manner that provided
there were no slip the top roll driven from the lower one would go at a slightly
greater peripheral speed than, the lower one.
By the above description it will be seen that if the spur wheel K be allowed to
run loose all the strain required to drive roller A comes on the top roller wrappers
also that in exact proportion to the amount of friction brought to bear upon the
-

page_text: spar wheel K by the plates and wooden washers P is that strain relieved until it is
entirely taken away or even a negative strain (the reverse way) set up. This
system is very important with rollers geared to run at different peripheral speeds
for grinding purposes as by regulating the pressure upon K the abrading or
grinding action can be very accurately regulated, so that the same rolls can be
changed at a moment's notice from an arrangement by which they exert only the
crushing action of equal speeded rolls to the tearing grinding action of very
differentially speeded ones, or to any condition between these extremes, and the
amount of this difference in speed can be regulated at pleasure.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is
1st. The manufacture or use for the purposes described of an auxiliary adjustable
frictional driving mechanism for driving the driven roll, whereby a part of the
strain of driving (variable at pleasure) can be taken up by the auxiliary apparatus
and the residue by the frictional contact of the one roller on the other.
2nd. The combination for the purposes described with a pair of rollers, of a spur
wheel on each roller shaft, one of which runs loose on its shaft, but is provided with
friction apparatus by which any required amount of driving power can be brought
to bear on the said shaft through said spur gearing instead of the entire force
required for driving the one roll being communicated through the surface of the
other rolls.
3rd. The driving apparatus substantially as and for the purposes herein
described.