An Improvement in Ore Stamps.
Year: 1896

page_text: Date of Application, 29th Dec., 1896-Accepted, 30th Jan., 1897
An Improvement in Ore Stamps.
1, REES REES, of Kapunda, in the Province of South Australia, 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 a buffing appliance for ore stamps more particularly
applicable to stamps of the kind described in the Specification No. 12,312 of 1895,
in which motion is imparted to the stamps by means of a crankshaft and connecting
rods which act through crossheads and springs, It has been found in practice that
theso springs sometimes become misshapen.
The special object of this invention is to encase the spring or springs so that they
may be effectually protected and thus prevented from losing their proper shape..
For this purpose I enclose the spring or springs in a metal casing in such a manner
as to prevent them from increasing in diameter, at the same time, arranging the
device so that it acts effectually for buffing. The case for the spring or springs.
may be constructed with the crosshead in one piece or it may be separable.
I prefer the former arrangement.
I shall describe my invention referring to the accompanying drawings in which
similar letters of reference are used to denote like parts.
Figure 1 is an elevation of spring and case according to my invention.
Figure 2 is a section of the same.
Figure 3 is a side view of the appliance.
Figure 4 is a sectional plan of the same.
Figure 5 alternative arrangement for enclosing both top and bottom springs in.
one case.
In Figs. 1 to 4 inclusive A is the stamp rod. B is the crosshead which can slide
freely upon the rod, the upper part C of the crosshead forms the case of my buffing
appliance.
C₁ C₁ are nipples through which pass set screws C. D is the buffing spring.
E is a cover free to slide upon the stamp rod and within the case C. E, E, are
slots in the cover receiving freely the ends of the set screws C. F F are leather
or rubber washers to deaden the noise in working; they are protected against.
excessive wear by metal washers G G. The stroke of the appliance is limited by
the collars H and J, which are fixed on the stamp rod.
The crosshead B and the casing C may be constructed in two separate parts if
desired, the division being at or near the dotted line X iu Figure 1.
When upward motion is imparted to the stamp rod A. by the crosshead B, the
blow on the collar H is conveyed through the bottom of the case C and the
cover E, hence the spring D which is always kept slightly in compression is not so
severely jarred as would be the case if it were quite free, moreover the circumference
of the spring being guarded by the case C, the spring cannot unduly increase in
diameter when compressed.
As the slots E, in the cover E are sufficiently long to allow the cover to descend
freely upon the spring D, the compressing action of the spring is retained
notwithstanding the presence of the set screws C, but the spring when suddenly
released by the downward movement of the crosshead is prevented against undue
extension.

page_text: With a casing such as herein described india rubber or other elastic material
may be used instead of metal springs, and it is to be understood that this appliance
can be employed for buffing purposes below the crosshead B if required as shewn in
Figure 5.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A metal casing such as C provided with nipples.such as C, and set screws such
as C, together with a cover such as E having slots E, substantially as and for the
purpose set forth.
2. The combination of the casing C with the crosshead Band spring such as D
or its equivalent, substantially as described...
Dated this 20th day of December 1906
ABEL. & IMRAY,
Agents for the Applicant..