Improvements in Mills for Grinding Mortar.
Year: 1898

page_text: Date of Application, 20th Sept., 1898-Accepted, 29th Oct., 1898
Improvements in Mills for Grinding Mortar.
I, EDWIN CHATHAM, of Church Street, Rhos-y-nedre, Ruabon, in the County of
Denbigh, North Wales, Builder, do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
My invention relates to improvements in mills for grinding mortar, and the object
of my improvements is to construct a mortar mill, preferably portable which can be
actuated by manual, or if desired, by steam or other motive power.
In carrying my invention into effect I employ any convenient form of mill and
arrange suitable gearing by which either the pan or the rollers may be caused to
rotate by manual or motive power; it is well known that by the employment of a
mortar mill mortar of much better quality can be mixed than that produced by
manual labour in the ordinary manner. By making the mill portable it can be con-
veniently employed for mixing mortar to be used when small buildings are being
erected, and where steam or other motive power is not available.
In the accompanying sheet of drawings-
Fig. 1 is an elevation of a mortar mill arranged to be driven by manual or other
motive power according to my invention and Figs. 2 and 3 are similar views to Fig. 1
showing alternative modes of arranging the driving gear.
In Figs. 1 and 2,-a designates the pan, 6 the central pillar to which the pan is
secured, c the shaft which carries the grinding rollers & which is supported in end
bearings e carried by the frame f, shown mounted upon wheels y and arranged to
carry a pair of shafts at h.
On the pan a is cast or secured a circular toothed rack i and engaging with this
rack is a spur pinion j mounted upon a vertical shaft k carried in bearings on the
frame of the mill; on the shaft is secured a bevel wheel / which gears into a second
bevel wheel m secured upon a horizontal shaft n to which is secured a handle o by
which, and the gearing described, the pan is driven.
In the arrangement shown in Fig. 2, there is a bevel toothed rack i on the pan a
into which gears a bevel pinion j mounted upon a horizontal shaft k carried in
bearings on the frame f of the mill; on the shaft k is secured a spur wheel / which
gears into a pinion m secured upon a shaft n to which is secured a handle o by which,
and the gearing described, the pan is driven.
In the arrangement of mill shown in Fig. 2, the spur wheels and m and the
shaft might be dispensed with in which case the handle would preferably be
secured upon a flywheel mounted on the shaft k or fitted direct upon this shaft.
In Fig. 3 the central pillar b rests in a footstep in the pan a, which in this case is
stationary, being bolted to brackets p; on the upper end of the shaft b is keyed a
bevel wheel g into which gears a pinion on a shaft s to which is secured a chain or
sprocket wheel t; a chain u passes over this wheel and a small chain wheel v carried
by a shaft w on which is secured a handle o by turning which the rollers in the pan
are driven.
In each arrangement, if it be desired to drive the mill by power, the handle may
be removed and replaced by a pulley, or pair of pulleys, for a belt, driven from a
motor engine.

page_text: 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 :-.
1. In a mortar mill, the combination with a circular toothed rack on the pan, of
gearing by which the pan can be driven by manual or by steam or other power.
2. In a mortar mill, the combination with a fixed pan, of gearing arranged to turn
the rollers by manual power.
1
1000
H. B. BARLOW & GILLETT,
Agents for Applicant, 17, St. Ann's Square, Manchester.