Improved Mill Stone Spindle and Appurtenances for Grinding Purposes generally.
Year: 1892

page_text: Date of Application, 12th Apr., 1892
Complete Specification Left, 12th Jan., 1893-Accepted, 18th Feb., 1893
PROVISIONAL SPECIFICATION.
Improved Mill Stone Spindle and Appurtenances for Grinding
Purposes generally.
I, THOMAS JAMES DAVEY, of The Cement Works, West Hartlepool, in the
County of Durham, Cement Maker, do hereby declare the nature of this invention
to be as follows:-
My invention relates to an improved millstone spindle, and appurtenances for
grinding purposes generally, the objects thereof being to ensure the greater
steadiness in running the stone, preventing the wearing of the journal or neck and
its brasses or bearings and the consequent stoppage of the stones for repair, and
further tends to decrease backlash of the driving gear.
"
"
In carrying my invention into effect I form the spindle with a taper or conical
end at the head thereof, and fit two or more feather keys thereto, abutting upon
the shoulder, and said feather keys are set parallel to and with the axial line
of the spindle, and the "mace or driving head is fitted thereon, the arrangement
of the keys keeping it in position under the strain and stress of the work, and
preventing it from getting loose. A collar, with wings or flies is bored and
furnished with keyways so as to fit upon the taper or conical head under the
driving head or mace before mentioned, a slight space however, being allowed
to intervene between the two faces when these parts are fitted in position.
Said mace or driving head is furnished with two or more studs or set pins upon
which a dust cap or plate is fitted, with a device for perfectly securing the
admission of dust or grit when necessary, such for instance as a shaped resilient
pad or washer, or equivalent appliance. The lower end of said spindle is fitted
into a footstep or other suitable bearing with arrangements for any suitable
driving gear.
I may, to suit certain cases of adoption modify the construction of the various
parts without departing from the essential features of my said invention and I may
also modify the arrangement thereof in a similar manner.
Dated this 9th day of Anril 1892
FREDK. WALKER,
11, Furnival Street, Holborn, London, E.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improved Mill Stone Spindle and Appurtenances for Grinding
Purposes generally.
I, THOMAS JAMES DAVEY, of the Cement Works, West Hartlepool, in the
County of Durham, Cement Maker, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
My invention relates to an improved millstone spindle and appurtenances for
grinding purposes generally, the objects thereof being to ensure greater steadiness
in running the stone preventing the wearing of the journal or neck and its brasses
or bearings and the consequent stoppage of the stones for repairs and to decrease
the backlash of the driving gear.
In carrying my invention into effect I form the spindle with a tapered or conical
end at the head thereof, and I fit two or more feather keys thereto parallel to the
axis of the spindle the mace or driving head is fitted thereon the arrangement
"

page_text: of the keys keeping it in position and preventing it from becoming loose in
working.
A collar with wings or flies is fitted on the conical head of the spindle under the
mace a slight intervening space being allowed between the said collar and the
"mace."
"
I also secure to the " mace a dust cap by means of set pins or screws too which
screws or pins is attached the "damsel" a suitable washer being introduced if
necessary between the "mace "and the cap to render the joint dust-proof.
The lower end of the spindle rotates in a suitable footstep bearing and the spindle
itself is provided with a feather key or other suitable device to enable it to be
driven by any suitable gearing, and in order that my said invention may be fully
understood I will proceed to explain the same with reference to the accompanying
sheet of drawings in which :-
:-
Figure 1 represents a section of a millstone spindle and its appurtenances con-
structed according to this invention.
Figure 2 is elevation of same.
Figure 3 is plan of same.
Figure 4 is elevation of head of spindle.
Figure 5 is plan of same shewing keys.
The same letters denote the same parts in all the figures.
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a is the spindle, b key, e pivot d conical head of spindle ef parallel feather keys
dovetailed into the spindle these keys are parallel to each other and to the axis of
the spindle a. g collar, hh wings or flies of same, i the "mace or driving head,
jcockhead, the cross-bar, m the dust cap, n n screws for securing same to the
mace and for attaching the damsel.
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The collar 9 and mace i are bored to fit the tapered head of the spindle and
suitable keyways are cut in the "mace" and collar to fit the keys e and f.
"
The spindle being turned conical at the head, and the "mace being bored to
fit the cone it is impossible for the " mace to work loose on the spindle.
"
The dust cap prevents dust from getting into the mace and wearing the cockhead
and cross bar.
In certain cases I may find it necessary to depart from the precise details shewn
by the drawings but
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 a mill-stone spindle for grinding purposes the use of a turned conical head
fitted with feather keys dovetailed or recessed into the same the said keys being
parallel to each other and to the axis of the spindle substantially as described and
shewn and for the purpose stated.
"
2. In a mill stone spindle and appurtenances for grinding purposes the " mace 2
bored to fit the conical head of the spindle a having keyways to fit the keys e and f
and a dust-proof cap o cover m substantially as described and shewn.
""
3. In a mill stone spindle and appurtenances for grinding purposes the combina-
tion of a spindle having a turned conical head fitted with feather keys recessed or
dovetailed therein with a collar having wings or flies thereon and "mace or
driving head provided with a dust-proof cap or cover the said collar and mace
being bored to fit the conical spindle head and provided with keyways to receive
the aforesaid keys all substantially as described with reference to the accompanying
drawings
FREDK. WALKER,
11, Furnival Street, Holborn, London, E.C., Agent for the Applicant.