Preventing Accidents Caused by the Splitting of Grindstones.
Year: 1893

page_text: Date of Application, 29th Dec., 1893
Complete Specification Left, 16th Aug.. 1894-Accepted, 22nd Sept., 1894
PROVISIONAL SPECIFICATION.
Preventing Accidents Caused by the Splitting of Grindstones.
CHARLES HENRY NASSAU 87 Page Hall Road Pitsmoor Sheffield in the
County of Yorkshire Mechanical Engineer do hereby declare the nature of this
invention to be as follows:
The object of this invention is to minimise the liability to accidents caused by
the splitting of grindstones.
To attain this object I employ an iron ring inserted on each side of the grind-
stoue & held in position by the washers & nuts of the said grindstone spindle.
It will thus be seen that should the said grindstone split it would be held together
by the said iron rings or hoops and thus prevent what might have been a serious
accident.
The said rings may be made either seperate or form part of the washers on the
grindstone spindle.
Dated this 28th day of December 1893.
COMPLETE SPECIFICATION.
Preventing Accidents Caused by the Splitting of Grindstones.
CHARLES HENRY NASSAU of 87 Page Hall Road Pittsmoor Sheffield in the
County of York Mechanical Engineer, do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
The object of my present invention is to devise means whereby the liability to
accidents caused by the splitting of grindstones is minimised, to attain which I
employ an iron or other suitable metal ring or insertion fitted on each side of the
grindstone and secured in position by the ordinary washers or plates and the nuts
of the said grindstone spindle.
In nearly all cases of the splitting of grindstones the fracture extends in a
radial direction from the periphery of the hole for the spindle to the circumference
of the grindstone, it will thus be obvious that should a grindstone split having my
device applied thereto the parts would be held together and the bursting asunder of
the grindstone would be prevented by the said side iron or other metal rings or
insertions and therefore what might otherwise result in a serious accident is
obviated.
The said iron or other metal rings or insertions may either be made separate
from or attached to or made in one with the ordinary side plates or washers.
In order to make my invention fully understood so that it may be more readily
carried into effect I hereunto attach a sheet of drawings in which Fig. I is a side
elevation with the ordinary side plates or washers removed and Fig.
is a cross
sectional elevation taken on line a a of said Fig. 1 with the side plates attached.
Fig. 3 is a cross sectional elevation of a side plate or washer having my
improvements made therewith and Figs. 4, 5, 6 and 7 are similar cross sectional
elevations of modifications thereof.
Fig. 8 is a cross sectional elevation of side plate or washer having my improved
device attached thereto.

page_text: Fig. 9 is a cross sectional elevation of side plate or washer with my improved
device made separate and Figs. 10 and 11 are similar sectional elevations of modi-
fications thereof.
Similar letters of reference denote corresponding parts in each view.
Referring to Figs. 1 and 2, the grindstone G is made with an annular recess g'
at each side thereof wherein I fit or place metal rings or insertions J which are
secured in position by the ordinary washers or plates P, and the nuts n which screw
on to the grindstone spindle S.
In Figs. 3, 4, 5, 6 and 7 the insertion J is made in one with the washer or
plate Pand in the case of the said Fig. 4 the insertion J is formed of a series of
projections as shown.
Referring to Fig. 8 the insertion J is composed of a series of projections which
are screwed to the plate or washer P and in Figs. 1, 9, 10 and 11 the insertion S
is made separate from the washer P as shown.
I would have it understood that I do not confine my invention to any particular
form or shape of insertion J either circumferential or cross sectional as it is obvious
the same may be modified in various ways therefore
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. In means for preventing accidents caused by the splitting of grindstones the
use of a ring or insertion J fitted in a recess ou each side of the grindstone and
either made with attached to or made separate from the ordinary washers or side
plates P and held in position by the latter substantially as described and illustrated.
Dated this 6th.day of August 1894.
H. F. BOUGHTON,
Certified Agent, Barnsley.