Improvements in Machines for Crushing Ores.
Year: 1895

page_text: Date of Application, 25th Jan., 1895
Complete Specification Left. 25th Oct.. 1895-Accepted. 18th Jan. 1896
PROVISIONAL SPECIFICATION.
Improvements in Machines for Crushing Ores.
We, THOMAS LEES, of Kings Arms Hotel, Girvan, Scotland, Hotel Keeper, and
WILLIAM DOUGLAS, of 7 Strathallan Terrace, Dowanhill, Glasgow, Scotland,
Mining Agent, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in machines for crushing ores.
In carrying out our invention the stamp is worked on a frame having an ordinary
upright slide guide and the usual opening between the cheeks of the slide, or the
stamp may be guided by an upright stem attached to the stamp, the stem
working vertically through openings in horizontal part of frame, the openings
being made to fit the stem. The stamp is raised by an endless chain or band
passing over pulleys or drums and situated on the opposite side of the frame, the
part of the chain nearest the frame for the time being moving upwards. The
stamp has an attachment situated within or without a channel or sleeve near the face
next to the chain or band, which attachment is capable of an independent vertical
movement. To this attachment a trigger is pivoted, one end of which terminates
in a hook or catch projecting through the opening in the slide towards the chain
or band, while the other projects in the opposite direction. When an upright stem
is used to guide the stamp an opening is made in the stem through which the
trigger projects.
After each drop of the stamp and when it is at rest the attachment descends
within its sleeve until it is wholly or partially contained therein. This movement
pulls downward the hooked end of trigger projecting towards chain, the tail end of
trigger being held up by top of stamp, cr projection on stem of stamp, the effect
of which being that the trigger is hooked on to the chain. Thus when the shaft
is set in motion, the stamp which is suspended by the trigger is raised by means of
the upward movement of the chain to the required height, when the tail end of
trigger comes in contact with a weight or other equivalent suspended from or
attached to the upper end of the slide or frame, and pressing it down unhooks the
other end of catch from the chain or belt, and so causes the stamp to drop. The
book or catch then automatically engages with the chain as already described.
The weight or equivalent can be raised or lowered so that any desired drop of the
stamp may be given.
Under a modification of our improvements the trigger may be centred on top
of the stamp, and is hooked on to the chain by means of a vertical rod or bar
passing loosely through the stamp. While the stamp is in suspension and during
its fall the lower end of the said rod or bar projects below it, so that when the
stamp is about to strike, the rod rises upwards and so raises the tail end of the
trigger, and the stamp is hooked on to chain so soon as the blow is struck.
The unhooking is accomplished as already described.
As a further modification the trigger may be pivoted to a rod to which the stamp
is attached. Fixed to this rod there is an outwardly projecting piece to which
there is pivoted a weighted lever. To the framework there is fixed an adjustable
stop for regulating the fall of the stamp. When the stamp is in its lowest or
normal position the hooked end of the trigger engages with the chain, while the
other end rests on one end of the weighted lever. As the shaft is set in motion
the stamp is raised until the opposite end of the trigger comes in contact with the
top, which, pressing down that end of the trigger, releases the other end or catch

page_text: from the chain, and so allows the stamp to:fall, and when it has reached its lowest
limit the hooked end of the trigger again engages with the chain by means of the
weighted lever, and so on.
As an alternative method, in place of having one end of the trigger in the form
of a hook, it may be in the form of a'link, and on each link or any desired number
of links of the endless chain we would provide a hook or catch which. as the chain
was raised, would engage with the link end of the trigger.
As a further modification, in place of having the trigger working on a pivot, we
may have it working in a slot. When the hooked end of the trigger in this case
has been released from the chain, the other end of the trigger comes in contact
with a projection fixed on the upper side of the outwardly projecting piece already
referred to and tilts the hooked end of the trigger over, when it again engages
with the chain.
Several stamps can be geared to the same driving shaft.
Dated this 24th day of January 1895.
BOTTOMLEY & LIDDLE,
154 St. Vincent Street, Glasgow, Applicants' Agents.
COMPLETE SPECIFICATION.
Improvements in Machines for Crushing Ores.
We, THOMAS LEES, of Kings Arms Hotel, Girvan, Scotland, Hotel Keeper, and
WILLIAM DOUGLAS, of 7 Strathallan Terrace, Dowanhill, Glasgow, Mining
Agent, 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 :-
This invention relates to improvements in machines for crushing ores.
In order that our invention may be properly understood and readily carried into
effect we have hereunto appended an explanatory sheet of drawings, in the several
figures of which corresponding parts are marked with the same letters of reference.
Figure 1 is a front elevation of machine constructed according to our improvements
showing two different forms of trigger.
Figure 2 is a side elevation partly in section of the machine, but showing only
one stamp and with the arrangement of trigger as shown in the outside stamp right
hand in Fig. 1.
Figure 3 is a detached view of the form of trigger as shewn in the four left-hand
stamps in Figure 1.
Figure 4 is also a detached view illustrating a further modification of trigger
and slot arrangement.
Figure 5 is a front view of a particular arrangement of chain.
In carrying out our invention the stamp A is worked on a frame B, and is.
guided by an upright stem C attached to the stamp, the stem working vertically
through openings D in horizontal part E of frame, the openings D being made to
fit the stem. The stamp A is raised by an endless chain, band, or other equivalent F,
passing over pulleys or drums G carried on two transverse shafts G₁ G2, and
situated on the opposite side of the frame, the part of the chain F¹ nearest the
frame for the time being moving upwards. The stem C has an attachment H
(shown on four left hand stamps, Figure 1 and in Figure 3,) situated within or
without a channel or sleeve Q near the face next to the chain or band, which
attachment is capable of an independent vertical movement. To this attachment H
a trigger I is pivoted, one end of which terminates in a hook or catch J projecting
through the opening in the sleeve towards the chain or baud F, while the
other projects in the opposite direction. An opening is made in the stem,
through which the trigger projects, as seen in Figures 1, 2, and 3.

page_text: After each drop of the stamp A. and when it is at rest, the attachment H descends
within its sleeve Q until it is wholly or partially contained therein, through the
hooked end J of the trigger I having been released from the chain as hereinafter
described. This form of attachment is more fully illustrated in detached view
Figure 3. This movement pulls downward the hooked end J of trigger I projecting
towards chain, the tail end of trigger being held up by top of stop or projection K
on stem of stamp A, the effect of which being that the trigger I is hooked on to
the chain F. Thus when the shaft G¹ is set in motion the stamp A, which is
suspended by the trigger I, is raised by means of the upward movement of the
chain F¹ to the required height, when the tail end l' of trigger I comes in contact
with a weight or cross bar L attached to the upper end of the slide or frame, and
pressing it down unhooks the other end J of catch from the chain or belt, and so
causes the stamp to drop. The hook or catch J then automatically engages with
the chain as already described. The weight or cross bar L can be raised or
lowered at will, so that any desired drop of the stamp may be given.
As a modification the trigger I may be pivoted to the rod or stem C to which
the stamp is attached. Fixed to this rod there is an outwardly projecting piece N,
to which there is pivoted a weighted lever O. To the framework there is fixed an
adjustable stop or bar L as aforesaid for regulating the fall of the stamp. When
the stamp A is in its lowest or normal position, the hooked end J of the trigger I
engages with the chain, while the other end rests on one end of the weighted
lever O. As the shaft is set in motion the stamp A is raised until the opposite
end of the trigger comes in contact with the stop L, which pressing down that
end of the trigger, releases the other end or catch from the chain, and so allows
the stem to fall, and when it has reached its lowest limit the hooked end of the
trigger again engages with the chain by means of the weighted lever, and so on.
This arrangement will be better understood by reference to Figure 2.
As a further modification in place of having the trigger working on a pivot we
may have it working in a slot, as shewn in Figure 4. When the hooked end of
the trigger in this case has been released from the chain, the other end of the.
trigger comes in contact with a projection fixed on the upper side of the outwardly
projecting piece already referred to, and tilts the hooked end of the trigger over,
when it again engages with the chain.
In lieu of constructing the chain with cross-bars at every link, as shown in
Figures 1 and 2, one cross-bar may be provided at every alternate or every third
link or more, as shown in Figure 5. To effect the automatic engaging of the
hooked end J of the trigger I with the cross-bar so formed, a spring or other
mechanical equivalent may be employed.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
In machines for crushing ores, the combination of the trigger I, rod C, and
counterweight O, or other equivalent operating automatically to attach and release
the stamps to and from an endless travelling chain, band, or other equivalent,
substantially as described and illustrated on the accompanying drawings.
Dated this 24th day of October 1895.
BOTTOMLEY & LIDDLE,
154 St. Vincent Street, Glasgow, Applicants' Agents.