Improvements in Stamp Batteries.
Year: 1895

page_text: Date of Application, 25th Jun, 1895-Accepted. 3rd Aug., 1895
COMPLETE SPECIFICATION.
Improvements in Stamp Batteries.
I, ALFRED GEORGE SAUNDERS, of Gouger Street, Adelaide 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 certain improvements in stamper batteries employed for
the purpose of disintegrating metalliferous ores and the like, by a series of blows
from a falling weight or stamp until it becomes more or less finely pulverized as
required.
The special object of my invention is to provide certain mechanism whereby the
power required for actuating such machines is more economically employed, and
the operation of stamping the ore is performed at a greater speed than is at
present customary.
For this purpose I dispense with the revolving cam shaft, and also the cams
which are usually employed for raising the stamp rods; and substitute certain
springs, as well as a crosshead, connecting rod, and crank shaft in lieu thereof as I
shall describe referring to the accompanying drawings.
Fig. 1 is a side elevation of the machine partly sectional.
Fig. 2 is a front elevation.
Fig. 3 plan of carrier device for main springs.
Fig. 4 sketch illustrating alternative device for main springs.
Throughout the drawings similar letters of reference are used to denote similar
parts.
A is the framework of the machine carrying the guides B for the stamp rods C
which terminate in the stainp shoes C' working in a stamp box C².
The lower arm D2 of a hinged spring carrier is securely bolted to the framework,
the upper arm D¹ being hinged to the lower arm at D. The upper arm is
preferably forked so as to pass on either side of the stamp rod C, and its free end
terminates in a boss D³ with cross pin D. Upon the upper arm D' of the spring
carrier a bearing D is provided so arranged as to allow sufficient room for a slight
radial movement in the working parts.
A slide block may be added if desired.
Between the upper and lower arms of the spring carrier a stout spring E is
arranged, and is preferably formed by securing one end of a plate or plates of
spring steel to each limb of the spring carrier. The contour of the plates is such
as will enable their free ends to impinge upon each other at E¹ as illustrated in the
drawings, at which point they may be hinged together, if so desired.
I do not, however, confine myself to this kind of spring, but as an alternative
may employ (with or without a spring carrier) a spring or springs such as illustrated
in Fig. 4 or any suitable equivalent thereof.
For the purpose of actuating the machine a connecting rod such as F is attached
to the link boss D³ and to the crank G¹ of the crank shaft G. Upon the stamp
rod C a sliding collar and crosshead device H is placed, and is arranged so as to
bear upon or work within the bearing D'. At a short distance above the working
position of the sliding collar and crosshead is fixed a collar J, the space between
the collar and the crosshead being occupied by a spring J', hereinafter referred to
as the compensating spring.
The strength of this spring is such as will enable it to carry the weight of the
stamper rod and shoe without material deflection. At a short distance below the

page_text: working position of the sliding collar and crosshead is fixed a collar K, the space
between it and the crosshead being occupied by a spring K¹, hereinafter referred
to as the buffing spring, the strength of which is less than that of the compensating
spring.
When the crankshaft G is caused to revolve, motion being imparted thereto by
means of a pinion such as L on the shaft G, gearing with a spur wheel such as M
on a spindle M² carrying a belt pulley or hand wheel such as M. As each crank
ascends the main spring is released elevating the bearing D' and the stamp rod C.
After passing the top centre, the crank descends lowering the bearing and D
and allowing the stamper to descend until it strikes the ore. The buffing spring K¹
is thus more or less compressed.
In case of an extra large or unbreakable block of ore under the stamp a further
compression of the buffing spring enables the crank shaft to pass the bottom dead
centre.
By means of the springs employed in the mauner described and illustrated an
amount of what is known as "give and take" is allowed in the several working
parts of the mechanism, and in actual experiment is found to be productive of the
beneficial results required.
When various ores are to be treated, the length of stroke may be varied by
altering the position of the collars J and K and adjusting the throw of the crank
to suit, or as an alternative means for obtaining the same object the distance
between the link boss D³ and the bearing D' may be varied.
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 in a stamper battery is :-
1. A main spring or springs such as E, with or without a spring carrier, and a
crosshead such as H, together with compensating and buffing springs such as J¹ K¹,
and their respective fixed collars J and K, substantially as and for the purposes
set forth.
2. In combination with the parts mentioned in the preceding claim, a connecting
rod such as F, and a crank shaft such as G, substantially as described.
Dated this 25th day of June 1895.
ABEL & IMRAY,
Agents for the Applicant.