Year: 1888

page_text: Date of Application, 2nd July, 1888
Complete Specification Accepted, 2nd Apr.,
1889
Complete Specification Accepted, 4th May, 1889
I, JAMES JORY TREGONING, of Tuckingmill, in the Parish of Camborne, in the
County of Cornwall, Mine Carpenter, do hereby declare the nature of this invention
to be as follows :—
My invention relates to stamp mills.
It is well known that in a stamp mill, the heads or pestles descend into a box or
coffer in one side of which is an aperture containing a grating through which the
stamped stuff passes. In order that no heavy particles shall escape it is necessary
that this grating, which is very fine, should be hold securely against the front of the
frame. Also it has been found that when the inside plate breaks, the grating also
gives way and becomes destroyed.
The chief objects of this invention are to secure the said grating in a much more
simple and efficient manner than before, and to reduce the wear and tear of the
same to a minimum.
According to my said invention I provide a frame having brackets for carrying
the gratings cast integral therewith. This frame is secured to the wood in front of
the stamps and the grating is put against the open space between the brackets, a
moveable iron frame being placed against it. Wedges are then driven down between
the inside part of the brackets and the bead fraine, thus firmly and securely fixing
the grating in position.
By this arrangement the grating can be changed while the stamp is working, by
stopping the flow of water.
The end or side of the coffer also has a frame similar to the one hereinbefore
described.
By means of the present improvements a considorable time will be saved in
changing the grating, whereby it necessarily follows that a considerable saving of
Inbour and therefore of expense will be effected.
Dated the 2nd day of July 1888.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.

page_text: Improvements relating to Stamp Mills for Crushing Ore.
I, JAMES JORY TREGONING, of Tuckingmill, in the Parish of Camborne, in the
county of Cornwall, Mine Carpenter, 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 stamp mills.
It is well known that in a stamp mill the heads or pestles descend into a box or
coffer in one side of which is an aperture containing a grating through which the
stamped stuff passes. In order that no heavy particles shall escape it is necessary
that this grating, which is very fine, should be hold securely against the front of the
frame. Also it has been found that when the inside plate breaks the grating also
gives way and becomes destroyed.
The chief objects of this invention are to secure the said grating in a much more
simple and officient manner than before, and to reduce the wear and tear of tho
same to a minimum.
In the accompanying drawing,
Figure 1 is a front elevation of a frame applied to tho aperture in the front part of
the coffer of a stamp mill and having the grating secured thereto in accordance with
my improvements.
Figures 2 and 3 are sections on the linos A B and C, D respectively of Figure 1.
Figures 4, 5 and 6 are similar views to Figures 1, 2 and 3 but illustrating the
means for securing the grating at the end or side of the coffer.
According to my said invention as illustrated in Figuros 1 to 3 I provide a frame a
having brackets b, b for carrying the grating e cast integral thorewith. This frame a
is socured to the wood A in front of the stamps by means of bolts B, B passed
throngh the holes d, d and the grating c is put against the open space between the
brackets b, ba moveable iron bond fraimne e being placed against it. Wedges f, fare
then driven down between the inside part of the brackets b, b and the bead frame e,
thus firmly and securely fixing the grating c in position.
By this arrangement the grating can be changed while the stamp is working, by
stopping the flow of water. For this purpose it is only necessary to knock out the
wedges, remove the grating, replace it by another and drive the wedgos in
again.
The ond or side of the coffer also has a frame, shewn in Figures 4 to 6, similar to
the one heroinbefore described with reference to Figures 1 to 3 with the exception
that the frame a is formed with lugs g, g to enable it to be fixed to the coffer A and
the frame is somewhat modified in shape and placod a short distance within tho
aperture of the coffer. The brackets b, bare formed by inward continuations of the
lugs g. 9.

page_text: By means of the present improvements a considerable time will be saved in
changing the grating whereby it necessarily follows that a considerable saving of
labour and therefore of expense will be effected.
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) The means for securing gratings to the coffers of stamp mills comprising a
frame adapted to be secured to the coffer and formed with brackets for receiving the
grating, a bead frame and wedges, substantially as hereinbefore described.
(2) The improvements relating to stamp mills for crushing ore, substantially as
hereinbefore described with reference to the accompanying drawing.
Dated the 2nd day of April 1889.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.