IMPROVED MEANS OF AND APPARATUS FOR COUNTER- ACTING OR COUNTERBALANCING THE RETURN WEIGHT OF HYDRAULIC COAL TIPS
Year: 1878

page_text: LETTERS PATENT to George Parfitt, of the Firm Parfitt and Jenkins, Tubal
•
Cain Iron Works and Hayes Foundry, Cardiff, in the County of Glamorgan,
for the Invention of "IMPROVED MEANS OF AND APPARATUS FOR COUNTER-
ACTING OR COUNTERBALANCING THE RETURN WEIGHT OF HYDRAULIC COAL
TIPS"
PROVISIONAL SPECIFICATION left by the said George Parfitt at the Office
of the Commissioners of Patents on the 19th March 1878.
GEORGE PARFITT, of the Firm Parfitt and Jenkins, Tubal Cain Iron Works and
Hayes Foundry, Cardiff, in the County of Glamorgan. "IMPROVED MEANS OF AND
APPARATUS FOR COUNTERACTING OR COUNTERBALANCING THE RETURN WEIGHT
OF HYDRAULIC COAL TIPS."
This Invention relates to improved means of and apparatus for counteracting or
counterbalancing the return weight of hydraulic coal tips.
In ordinary hydraulic coal tips, as at present constructed, the return weight after
the lifting has taken place and the load been delivered is counterbalanced by means
of weights and chains, or other equally cumbersome arrangements, or else the
return weight is altogether lost.
Now according to my Invention I dispense with these weights or chains and fit
an auxiliary counterbalance ram or rams to the lifting ram or rams, which will
draw in water on the up stroke, and on returning will deliver that water into the
main, thus acting as a counterbalance, and at the same time keeping up the pressure
in the main. Or I may fit two rams, both acting as lifting rams on the up stroke
(in lieu of one only, and the other as a pump, as in the previously described case),
and on the down stroke the larger or main lifting ram would be caused to force
back into the main, while the water from the smaller ram would be allowed to
escape.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said George Parfitt in the Great Seal Patent Office on the 19th September
1878.
GEORGE PARFITT, of the Firm Parfitt and Jenkins, Tubal Cain Iron Works and
Hayes Foundry, Cardiff, in the County of Glamorgan. "IMPROVED MEANS OF AND
APPARATUS FOR COUNTERACTING OR COUNTERBALANCING THE RETURN WEIGHT OF
HYDRAULIC COAL TIPS."
This Invention relates to improved means of and apparatus for counteracting or
counterbalancing the return weight of hydraulic coal tips.
In ordinary hydraulic coal tips, as at present constructed, the return weight after
the lifting has taken place and the load been delivered is counterbalanced by means
of weights and chains, or other equally cumbersome arrangements, or else the
return weight is altogether lost.
Now according to my Invention I dispense with those weights or chains and fit
an auxiliary counterbalance ram or rams to the lifting ram or rams, which will
draw in water on the up stroke, and on returning will deliver that water into the
mains, thus acting as a counterbalance, and at the same time keeping up the pressure
in the main. Or I may fit two rams, both acting as lifting rams on the up stroke
(in lieu of one only, and the other as a pump, as in the previously described case),
and on the down stroke the larger or main lifting ram would be caused to force
back into the main, while the water from the smaller ram would be allowed to
escape.
One example of the way in which my Invention may be carried into effect is
shown in the annexed Drawing.
A is the tipping platform; B, the lifting ram. Suppose the load up to be
24 tons and the weight back 14 tons; now usually this return is counterbalanced
as beforo stated by weights and chains, which are cumbersome, or the return power
is lost.
According to my Invention I fix an auxiliary counterbalance ram C or rams (as
shown in dotted lines), which will draw in water on the up stroke, and on returning
will pump that water into the mains, and so keep up the pressure. This may be
applied to tips already fitted up.
In the case of new ones I should fit two rams. At the first, one of sufficient size
and area of ram to lift 14 tons; the other 10 tons. The water power would be
used in both on the up stroke; but on the down stroke the 14 ton 'ram would force.
back into the main, and the 10 ton ram water, only be allowed to escape as at
present.
And having now described the nature of my said Invention, and in what manner
the same is to be performed, I declare that I claim as my Invention, the improved
means of and apparatus for counteracting or counterbalancing the return weight of
hydraulic coal tips, as herein-before described, and substantially as shown in the
annexed Drawings.
In witness whereof, I, the said George Parfitt, have hereunto set my hand and
seal, this Seventeenth day of September, One thousand eight hundred and
seventy-eight