Improvements in Machines for Crushing Ores.
Year: 1896

page_text: Improvements in Machines for Crushing Ores.
I, THOMAS LEES, of Kings Arms Hotel, Girvan, Hotel Keeper, do hereby declare:
the nature of this Invention to be as follows:-
This Invention relates to improvements in machines for crushing ores and is a
further development of Patent No. 1751 A.D. 1895.
Under the present Invention the trigger is provided with several arms and is
made to revolve in a channel on the stem of the stamp. As the chain travels up-
wards it becomes engaged with one arm of the revolving trigger one of the other
arms being held by a stop provided for that purpose, which causes the trigger to
become rigid for the time being. When the stamp is raised and reaches the
desired height the stop is forced clear of the arm by means of a lever, thus reliev-
ing the trigger and allowing it to partly revolve, so that the arm which has been
engaged with the chain becomes released, and the stamp is thus allowed to drop.
The arm following that which has just been released from the chain next engages
with the chain, and is operated as already described, the same operation taking
place with each individual arm.
To prevent the trigger rebounding back I provide a suitable stop for that
purpose.
Dated this fith day of October 1896
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Agents.
I, THOMAS LEES, of Kings Arms Hotel, Girvan, Hotel Keeper, 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 and is a
further development of Patent No. 1751 A.D. 1895.
Under the present Invention the trigger is provided with several arms and is
made to revolve in a channel on the stem of the stamp. As the chain travels up-
wards it becomes engaged with one arm of the revolving trigger, one of the other
arms being held by a stop provided for that purpose, which causes the trigger to
become rigid for the time being. When the stamp is raised and reaches the
desired height the stop is forced clear of the arm by means of a lever, thus reliev-
ing the trigger and allowing it to partly revolve, so that the arm which has been

page_text: engaged with the chain becomes released, and the stamp is thus allowed to drop.
The arm following that which has just been released from the chain next engages
with the chain, and is operated as already described, the same operation taking
place with each individual arm.
In order that my Invention may be properly understood and readily carried into
effect I have hereunto appended a sheet of Drawings in the Figures of which
corresponding parts are marked with the same letters of reference.
Figure 1 is a side view partly in section illustrating the improvements.
Figure, 2 is a front view.
A is the spindle carrying the weight which is lifted and allowed to fall on the
ore. The spindle is connected with a channel B in which the trigger Cis pivoted at c.
The trigger is provided with several arms c1, c2, c, which engage with the rivets d
of the chain D. As the chain travels upwards one of the rivets d becomes engaged
with one of the arms of the trigger. One of the other arms is engaged with the
stop e on lever F which is pivoted at f to the channel in which the trigger works.
Thus the trigger is prevented from turning round and as the chain travels upwards
it carries the trigger and stamp with it. The stop e engages with notch on the
arm by means of a spring G connected to the lever F, or other suitable device.
When the stamp is raised to the required height the end of the lever F comes
against a fixed stop H attached to the framework of. the machine and the stop e
becomes disengaged from the trigger, which is thus free to turn round and the
arm which was engaged with the chain becomes released and the stamp is allowed
to drop. The arm following that which has just been released from the chain next
becomes engaged with the chain and is operated as described. To prevent the
trigger rebounding back, I provide a suitable stop I for the purpose.
Having now particularly described and ascertained the nature of my said In-
vention and in what manner the same is to be performed, I declare that what I.
claim'is:
The improved trigger with stop and means of release substantially as described.
Dated this 9th day of July 1897.
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Patent Agents.