Improvements in the Manufacture of the Hoops or Tyres of Rollers: for Mortar Mills and other Grinding Mills.
Year: 1893

page_text: Date of Application, 11th Feb., 1893
Complete Specification Left, 8th Nov., 1893-Accepted, 9th Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of the Hoops or Tyres of Rollers:
for Mortar Mills and other Grinding Mills.
I, WILLIAM HUGIUN WALKER of the Wicker Iron Works, Sheffield in the
County of York, Engineer do hereby declare the nature of my invention to be as
follows:-
:-
This invention relates to an improvement in the manufacture of the hoops or
annular faces of rollers used in mortar mills, and other grinding and crushing mills,.
the object being to prevent the fracture or chipping of the extreme edges of such
rollers, which so often occurs with chilled hoops as at present made.
It consists in the method of chilling the working face of the hoop so that while.
the bulk of the face is chilled, the extreme edges are not chilled and made brittle,
and I accomplish this by using a chill narrower in width than the face of the hoop,.
and so adjusted in the mould that both edges of the hoop are moulded in the
sand and are not brought in contact with the chill.
Dated the 8th day of February 1893.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of the Hoops or Tyres of Rollers.
for Mortar Mills and other Grinding Mills.
I WILLIAM HUGIUN WALKER of the Wicker Iron Works, Sheffield in the
County of York, 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 :-
My invention relates to an improvement in the manufacture of the hoops or
annular faces of rollers used in mortar mills and other grinding and crushing mills.
in which such rollers are used, the object being to prevent the fracture or chipping
of the extreme edges of such rollers, and which so often occurs with chilled hoops
as at present made.
The annexed sheet of drawings illustrates my invention, as applied to the hoop of
roller such as I have described.
Fig. 1, is a vertical cross section of a hoop.
Fig. 2, is a side elevation of same hoop..
The invention consists in chilling the central part of the working face of the
roller while leaving the extreme or outside edges of the softer metal which is not
so liable to fracture, and I wish it to be understood that it is not only the damage
to the rolling face that is to be avoided, but the serious damage that occurs by the
small splinters which get mixed up in the material, in the case of firebricks and
the like.
I therefore construct a ring of metal, or a number of sections which when
put together will form an aunular "chill" as indicated in section in Fig. 1, by the
letter C; the internal face of this chill is narrower in its width than the face of the
hoop H, and it is placed in the sand so that its position with regard to the casting
of the hoop is as shown in Fig. 1, with the edges of the hoop H, marked E,
extending beyond the chill, and not brought into contact therewith.
The metal of the two edges is therefore unchilled and not so hard and brittle, and
consequently they are not so liable to fracture when in use.
•

page_text: Having now particularly described and ascertained the nature of my inven-
tion, and in what manner the same may be performed, and carried into practice,
I declare that what I claim is :-
1. The method of chilling the central portion of the face of hoops or tyres for
the rollers of crushing or grinding mills while leaving the edges unchilled,
substantially as herein before described and shown.
2. A hoop or tyre for the rollers of crushing and grinding mills, having the
central portion of its face "chilled," and the edges "unchilled" substantially as
hereinbefore described and as illustrated.
Dated the 4th day of November 1893.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.