IMPROVEMENTS IN THE CONSTRUCTION OF SUGAR-CANE MILLS
Year: 1878

page_text: LETTERS PATENT to Robert Bartlett, of the City of London, Engineer, for the
Invention of "IMPROVEMENTS IN THE CONSTRUCTION OF SUGAR-CANE MILLS."
Sealed the 17th December 1878, and dated the 3rd July 1878.
PROVISIONAL SPECIFICATION left by the said Robert Bartlett at the Office
of the Commissioners of Patents on the 3rd July 1878.
ROBERT BARTLETT, of the City of London, Engineer. "IMPROVEMENTS IN THE
CONSTRUCTION OF SUGAR-CANE MILLS."
This Invention consists in improvements in the construction of sugar-cane mills,
whereby the strength of such mills is greatly increased, thus allowing greater
pressure than hitherto to be put upon the top and megass rollers without danger of
breakage to the cheeks, standards, or headstocks of the mill, and whereby the
unequal wear of the pinions and of the brasses of the top roller is prevented.
In carrying out my improvements I employ four main bolts, each running
parallel with the centre line drawn from the horizontal centre of the top roller and
the horizontal centro line of the megass or lower roller; also two main bolts
parallel with the line drawn parallel with the horizontal centre line of the top and
front or cane roller, the said four bolts holding the top roller down to the megass
roller passing outside the two bolts holding the top roller down to the front or cane
roller.
•
I also construct the mill check, standard, or headstock with two caps for holding
down the top roller; one of these caps is for bearing the strain or pressure exerted
between the top and front or cane rollers, and through which cap I pass the two
herein-before described main bolts, and the other cap is for bearing the strain or
pressure exerted between the top and megass rollers, and through which cap pass
the four herein-before described main bolts. By this arrangement of the caps and

page_text: bolts I place the seats of all the bearings at a right angle with the aforesaid centre
lines of the bolts, and thus distribute the pressure over the whole surface of the
bearing holding down the top roller, thus throwing all the working strains on the
aforesaid six bolts, and relieving the cheeks, standards, or headstocks of the strain.
To prevent the unequal wear of the pinions I place the pinions conuecting the 5
top and cane rollers on one side of the mill, and those driving the top and megass
rollers on the other side of the mill, by which arrangement I am enabled to suit
their diameter and pitch to the work required of them, at the same time having all
the pinions on the roller gudgeons or spindles.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Robert Bartlett in the Great Seal Patent Office on the 2nd January
1879.
ROBERT BARTLETT, of the City of London, Engineer,
CONSTRUCTION OF SUGAR-CANE MILLS."
"IMPROVEMENTS IN THE
This Invention consists in improvements in the construction of sugar-cane mills,
whereby the strength of such mills is greatly increased, thus allowing greater
pressure than hitherto to bo put upon the top and megass rollers without danger of
breakage to the cheeks, standards, or headstocks of the mill, and whereby the unequal
wear of the pinions and of the brasses of the top roller is prevented.
In carrying out my improvements I employ for each cheek or standard four main
bolts, cach running parallel with the contre line drawn from the horizontal centre
of the top roller and the horizontal centre line of the megass or lower roller; also
for cach check or standard two main bolts parallel with the line drawn parallel
with the horizontal centre line of the top roller and front or cane roller, the said
four bolts holding the top roller down to the megass roller passing outside the two
bolts holding the top roller down to the front or cane roller.
I also construct the mill cheek, standard, or headstock with two caps for holding
down the top roller; one of those caps is for bearing the strain or pressure exerted
between the top roller and front or cane roller, and through which cap I pass the
two herein-before described main bolts, and the other cap is for bearing the strain
or pressure exerted between the top and megass rollers, and through which cap pass
the four herein-before described main bolts.
To prevent the unequal wear of the pinions I place the pinions connecting the
top roller and cane roller on one side of the mill and the pinions driving the top
roller and megass roller on the other side of the mill, by which arrangement I am
enabled to suit their diameter and pitch to the work required of them, at the same
time having all the pinions on the roller gudgeous or spindles.
But to make my Invention better understood I will proceed to describe the same
by reference to the accompanying Drawings, in which,―
Figure 1, Sheet 1, is an elevation of one of the checks, standards, or headstocks
of a sugar mill constructed according to my improvements; Figures 2 and 3,
Sheet 1, edge views of same.
Figure 4, Sheet 2, plan of a sugar mill constructed according to my improve-
ments, and showing my arrangement of the pinions of the rollers; and Figure 5,
end view of same.
Similar letters in all the Figures represent similar parts.
J, J, J, J, are the four main bolts on the megass roller side of each check or
standard L; and A, A, the top caps through which the said bolts J pass; K, K, are
the two main bolts on the cane roller side of each cheek or standard L; and B, B,
the caps through which the said bolts K, K, pass, the bolts J passing outside the
bolts K, as shewn; G is the top roller of the mill; H is the megass roller; and I
is the cane roller; M, canted brasses of the top roller, placed at right angles to the
direction of the strain.
C is the pinion of the top roller for the megass side of the mill; and D is the
pinion of the top roller for the cane side of the mill; E is the lower pinion of the
cane roller I; and F, lower pinion of the megass roller H, the pinions C and F being
smaller in diameter than the pinions D and E.
It will be seen by this arrangement that I employ two caps instead of the usual
solid jaw to form the upper part of the mill cheek, and thus I am enabled to so place
the brasses that the wearing surface and seats are brought directly opposite to the
heaviest pressures or strains; the seats of all the bearings or brasses being placed at
a right angle with the aforesaid centre lines of the bolts, and thus distribute the
pressure over the whole surface of the bearing E holding down the top roller F, thus

page_text: throwing all the working strains on the aforesaid six bolts on each side, and
relieving the cheeks, standards, or headstocks of the strain.
Further, the herein-before described arrangement of the pinions allows of cach
pair being properly geared, so that they can wear together, and allows of all the
pinions being placed on the roller gudgeons or spindles.
Having thus described my said Invention, and the manner of performing the
same, I wish it to be understood that I lay no claim to the placing of the bearings
of the lower rollers of a sugar-cane mill at right angles to the direction of the strain,
but what I do claim is,-
Firstly. The construction and employment in sugar-cane mills of two caps on
each cheek or standard in place of the ordinary solid jaw, whereby I am enabled to
place the seats of the top roller bearings directly opposite or at right angles to the
direction of the strain, substantially as described.
Secondly. The method of arranging the pinions for driving the rollers with
different diameters, thereby allowing of placing them all on the spindles or gudgeons
of the rollers, so that they may be properly geared together, as and for the purposes
herein-before described.
In witness whereof, I, the said Robert Bartlett, have hereto set my hand
and scal, this First day of January, in the year of our Lord One thousand
eight hundred and seventy-nine.
R BARTLETT. (L.S.)
Ꭱ