Improvements in Mountings for Mill Stones.
Year: 1891

page_text: Date of Application, 15th Oct., 1891
Complete Specification Left, 4th June, 1892-Accepted, 1st Oct., 1892
TRUVIDIONAL DEVITICATION.
Improvements in Mountings for Mill Stones.
We HARRY CLAYTON SHAW of Mill Brow, Sutton in the County of Lancaster,
Manager of a Chemical Manure Works, JOHN CRONE and DAVID CRONK TAYLOR
both of Sutton Oak in the County of Lancaster, Chemical Manure Manufacturers,
do hereby declare the nature of this invention to be as follows:-
This invention has for its object a method of and device for mounting mill
stones whereby they can run for long periods without remounting and whereby
they can be lubricated during any stoppage of the mill of a few minutes without
difficulty.
In place of fixing the centre piece or bush for the spindle in the stone I form
it in one with the bed-plate or attached to the bed-plate upon which the lower
stone is fixed, and in place of the usual wedges I use a simple brass gland or
bearing. On this gland or bearing I fix the ordinary gland round which the
sweep usually revolves. The sweep instead of being a separate piece as is usually
the case is formed in one with the driving box and is turned so as to fit nicely
round the gland, or as I prefer to call it the "oil reservoir," as this gland has a
vacant space between it and the spindle sufficient to retain a sufficient quantity of
oil, and in this space I place worsted or other like material so as to catch any dirt
that by any chance may pass between the sweep and the gland or get into it in
any other manner.
In the driving box I construct an oil chamber and connecting
this oil chamber with the oil reservoir aforesaid by means of a tube passing up
into the oil chamber and descending to near the oil reservoir. The driving box
is cut away for an inch or so, so as to allow the oil reservoir to pass up into it.
By this means the wear and tear of the stone can be regulated.
The mode of action is as follows:-
The spindle being once for all thoroughly aligned and the brass or bronze
bearings inserted in position the combined sweep and driving box are placed in
position a little overlapping the oil reservoir, the oil chamber is filled with oil and
a piece of worsted of the requisite calibre placed in the top and hanging over
into the oil so as to form a syphon drip. The covered screw by the oil chamber
is then put on.
There can be two or three of these oil chambers, tubes or drill
holes if desired. The oil running down the tube or drill hole on to the interior of
that part of the driving box to which the sweeps are attached lubricates the
bearing surface between the sweep and the oil reservoir, it then runs down into
the oil reservoir and from there gradually percolates into the brass bearing. In
order to regulate the stone as it wears three set screws are placed below the centre
piece plate so that it can be raised or packed up at intervals so as to bring up the
fevel of the stone.
1
1001
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Mountings for Mill Stones.
We HARRY CLAYTON SHAW of Mill Brow, Sutton, in the County of Lancaster,
Manager of a Chemical Manure Works, JOHN CRONE and DAVID CRONK TAYLOR,
both of Sutton Oak, in the County of Lancaster, Chemical Manure Manufacturers,
do hereby declare the nature of this invention and in what manner the same is
Pine 821

page_text: to be performed, to be particularly described and ascertained in and by the following
statement:
This invention has for its object a method of and device for mounting mill
stones whereby the neck bearings are much better lubricated than has hitherto
been the case, and, at the same time, kept perfectly free from dust. The said
bearings can be lubricated without difficulty during the stoppage of the mill of a
few minutes, and, by reason of the improved lubrication, the mill stones can be run
for longer periods without re-mounting.
The invention will be best understood by referring to the accompanying
drawing, which is a vertical section of the improved device applied to a pair of
gtones.
A, is the central bush usually fixed to the stone, but, in this improved device, it
is attached to and supported by the pan a, or it may, if desired, be formed in one
with the pan. B is a brass or bronze lining forming a bearing for the spindle A¹.
Immediately above the bush A and resting on it, as ordinarily, is the gland B³,
but this gland has an annular space to receive the oil, hereinafter called the oil
reservoir. The sweep C, instead of being a separate piece, as is usually the case,
is formed in one with the driving box C (though, of course, if desired, it may be
a separate piece) and is turned or provided with a lid or cover c which surrounds
the oil reservoir B' and prevents any dust from getting to the bearings.
When the sweep and driving box are made separately, the sweep or cover is
bored and tapped and fitted with a pipe which passes up passage E¹ and meets the
plug F. In the annular space aforesaid is placed worsted or other material,
which, besides acting as a syphon, may catch any dirt that should happen to get
in. A ring d, of wire, will be found advantageous to keep the wick D in position.
The sweep C is cut away for an inch or so, or, what is equivalent, its part forming
the cover may overlap the oil reservoir to allow the stones to be regulated.
Through the driving box C is formed, if desired, an oil chamber E, connected
with a passage to convey oil to the oil reservoir B-say by means of a tube E¹.
F is a screwed plug. If an oil chamber E be provided, the oil reservoir B¹ might
be dispensed with, as the oil could be led direct from there against the upper end
of the spindle A¹.
The mode of action is as follows:-
The spindle A' having been properly aligued and the brass or bronze bearing B
inserted, the combined sweep and driving box is placed in position with the
sweep C and cover c a little overlapping the oil reservoir B'. The latter is then
filled with the lubricant by means of chamber E and tube E', and the plug F-is
inserted. The oil is fed to the neck bearing by means of the syphon wick D.
This constant and regular lubrication of the spindle insures the more regular and
freer working of the stones. The above description refers more particularly to
the device when used in connection with a pair of stones resting in an iron pan,
but it can be adapted to every description of stones irrespective of the thickness,
or the nature of the supports. It is, however, preferable to fix the improved
device to the pan or other support independent of the stone, so that the bedstone
can be raised from time to time, as it wears, without disturbing the neck bearing
or reservoir.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what we
claim is :-
1. The improvements in mountings for mill stones, consisting in providing
about the top of the mill spindle A', and preferably having the bush A as its
seating, a gland or oil reservoir, adapted with means for the introduction of oil
and for conveying it to the spindle, all substantially as hereinbefore described.
2. In a mounting for mill stones, a gland or oil reservoir B¹ provided with a
cover or lid and means (such as a chamber and tube) whereby the gland or
reservoir can be filled, all arranged substantially as hereinbefore described.

page_text: 3. In a mounting for mill stones having a gland or oil reservoir B', so forming
the central part of the sweep C, that it will act as a cover or lid to such gland or
reservoir, substantially as set forth.
4. The general arrangement and construction of parts forming the improvements
in mountings for mill stones substantially as described.
Dated this 3rd day of June 1892.
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester, Nottingham, and London, Patent Agents.