IMPROVEMENTS IN APPARATUS FOR SAVING THE BREAKAGE OF COALS WHEN DELIVERING THE SAME FROM COLLIERY SCREENS OR OTHERWISE INTO WAGONS OR OTHER RECEPTACLES."
Year: 1876

page_text: LETTERS PATENT to Addison Molyneux Potter, of Heaton, near Newcastle-
upon-Tyne, in the County of the same Name, Mining Engineer, for the In-
vention of "IMPROVEMENTS IN APPARATUS FOR SAVING THE BREAKAGE OF
COALS WHEN DELIVERING THE SAME FROM COLLIERY SCREENS OR OTHERWISE
INTO WAGONS OR OTHER RECEPTACLES."
PROVISIONAL SPECIFICATION left by the said Addison Molyneux Potter at
the Office of of the Commissioners of Patents on the 15th August 1876.
ADDISON MOLYNEUX POTTER, of Heaton, near Newcastle-upon-Tyne, in the
County of the same Name, Mining Engineer. "IMPROVEMENTS IN APPARATUS
FOR SAVING THE BREAKAGE OF COALS WIEN DELIVERING THE SAME FROM COLLIERY
SCREENS OR OTHERWISE INTO WAGONS OR OTHER RECEPTACLES."
This Invention relates to improvements in apparatus for saving the breakage of
coals when delivering the same from colliery screens or otherwise into wagons or
other receptacles.
The apparatus I have found most advantageous to employ for this purpose con-
sists of an iron tray, which is slightly longer than the width of the ordinary colliery
screen, and about 30 inches wide, having a ledge round the hack and each side.
This tray is hung by two chains immediately under the "flat" part of the screen
working over pullies, and balanced by two weights working in guides, which are
heavier than the tray.
The back chain is attached to the tray by two iron rods, which work in guides at
each side of the end of the screen. In the rods there are a number of holes about
6 inches apart, in which pins are placed equidistant from the tray to regulate its
descent.
The two balance weights are held down by a weighted lever until the weight of
coal on the tray is heavier than the lever and weights, when the tray descends and
the weights rise, and thus disengage themselves from the lever.
When the tray reaches the required depth the back chain is checked by the pins

page_text: striking the low guides, which causes all the coal to slide off the tray, thus depositing
it without any fall into the wagon. The tray then being empty the weights bring
it back to its original position, and at the same time fall below the lever, thus
rendering the whole apparatus ready for work again.
The mechanical details may be varied without departing from the broad principle
of my Invention.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Addison Molyneaux Potter in the Great Seal Patent Office the 16th
January 1877.
ADDISON MOLYNEUX POTTER, of Heaton, near Newcastle-upon-Tyne, in the 10
County of the same Name, Mining Engineer. "IMPROVEMENTS IN APPARATUS FOR
SAVING THE BREAKAGE OF COALS WHEN DELIVERING THE SAME FROM COLLIERY
SCREENS OR OTHERWISE INTO WAGONS OR OTHER RECEPTACLES."
This Invention relates to improvements in apparatus for saving the breakage of
coal when delivering the same from colliery screens or otherwise into wagons or 1
other receptacles.
And in order that my Invention may be clearly understood and readily carried
into practice, I will proceed to describe the Drawings hereto annexed.
Figuro 1 shows a side view; Figure 2, a plan; and Figure 3, a front view of
apparatus arranged and constructed in accordanco with my Invention.
The apparatus I have found most advantageous in practice consists of a tray or
other receptacle M, which is sligntly longer than the width of the screen N, and
about two feet six inches wide for ordinary wagons, but varying in width to suit the
size and shape of the wagon, truck, or other receptacle into which the coal is to be
delivered suspended underneath the flat part of the screen by two chains Q and Y
working over pullies P, P, and overbalanced by two weights R, R, which are
heavier than the tray or other receptacle.
The back chain Q is connected with the tray or other receptacle, as the case may
be, by two bars S, S, which work in guides T, T, and V, V, at each side of the
end of the screen. In these bars there are a number of holes W, W, about six
inches apart, in which pins X, X, are placed equidistant from the tray or other
receptacle to regulate its descent.
The balance weights R, R, are held down by a lever Z until the weight ofc oal
on the tray or other receptacle is heavier than the weights and lever when tho lever
is raised, and the weights thus disengaged the tray descends into the wagon, and
when reaching the required depth the back chain Q is checked by the pins X, X,
striking the top guides T, T, which causes all the coal to slide off the tray or other
receptacle, thus depositing the coal without any fall in the wagon; the tray or
other receptacle being released of the weight returns to its original position.
The whole machine is self-acting, except that the screeners have by altering
the position of the pins X, X, to regulate the descent of the tray as the wagon
fills.
Having thus described the nature of my Invention and the manner of performing
or carrying the same into practice, I would remark that I do not claim any of the
parts separately, neither do I confine myself to the exact details and arrangement
of apparatus herein described, so long as the main features theroof are retained, as
the same may be varied without departing from the true character of my Invention;
but what I claim is, the improved arrangement and construction of apparatus for
delivering coals from colliery screens or other places so as to save breakage thereof,

page_text: substantially in the manner and for the purpose herein-before fully described and
represented in the Drawings annexed.
In witness whereof, I, the said Addison Molyneux Potter, have hereunto
set my hand and seal, this Thirteenth day of January, in the year of our
Lord One thousand eight hundred and seventy-seven.
ADDISON MOLYNEUX POTTER. (L.S.)|