IMPROVEMENTS IN INDICATING AND REGISTERING APPARATUS FOR PUMPING ENGINES "
Year: 1882

page_text: LETTERS PATENT to Henry Davey of Headingley near Leeds in the county of
York for an invention of "IMPROVEMENTS IN INDICATING AND REGISTERING
APPARATUS FOR PUMPING ENGINES
"
PROVISIONAL SPECIFICATION left by the said Henry Davey at the Office
of the Commissioners of Patents on the 3rd March 1882.
HENRY DAVEY of Headingley near Leeds in the County of York
"IMPROVE-
MENTS IN INDICATING AND REGISTERING APPARATUS FOR PUMPING ENGINES
"
My invention relates to apparatus whereby the lengths of strokes of a pumping
engine are indicated, the quantity of water pumped by it in a given time is
registered, and the level of water in the well is shown. The several parts of the
apparatus may be conveniently arranged in one instrument, or they may if desired
be employed separately. I will describe the instrument in which the several parts
are combined. It consists of a case or pedestal surmounted by a clock which
gives motion to a paper cylinder like that used for an indicator. On the one side
of this is a graduated scale along which an index reciprocates, this index being
connected by a rod or cord to a reciprocating part of the engine or pump or to a
lever or pulley worked by it so as to shew to a reduced scale the length of stroke.
At the other side of the paper cylinder is another graduated scale along which
moves an index carrying a pencil that traces a line on the revolving paper cylinder.
This index, through ratchet and pawl or other suitable gear, receives onward
motion from the reciprocating index, so that the line traced on the paper indicates
the space passed over by the pump piston and consequently, the scale being
properly adjusted, it registers the quantity of water pumped in a given time,
division lines on the paper shewing the time. In the lower part of the pedestal
the level of water in the well is shewn by the height of a column of mercury in a
glass tube bent to the form of a U. One limb of the U is open at the top, the

page_text: other limb is connected to a pipe that descends into the well and has an open
mouth at a low level therein. The pressure of the water column above the mouth
of the pipe compresses to a certain extent the air in the pipe and this pressure
communicated to the mercury depresses it in the one limb of the U tube and
raises it in the other limb, the difference of level as shewn on a graduated scale
being proportional to the height of water in the well above the mouth of the pipe.
In order to obtain a correct indication a small air compressing pump attached to
the pipe is worked by hand till the mercury attains its maximum difference of
level. The scale may be adjusted by direct trial and in that case the air pump
may be dispensed with. In order to reduce the error of indication the lower end
of the pipe which is immersed in the water is expanded in bell form.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Henry Davey in the Great Seal Patent Office on the 30th August
1882.
HENRY DAVEY of Headingly near Leeds in the County of York " IMPROVE-
MENTS IN INDICATING AND REGISTERING APPARATUS FOR PUMPING ENGINES"
My invention relates to apparatus whereby the lengths of strokes of a pumping
engine are indicated, the quantity of water pumped by it in a given time is
registered-and the level of water in the well is shown. The several parts of the
apparatus may be conveniently arranged in one instrument, or they may if desired
be employed separately. I will describe the instrument in which the several parts
are combined. It consists of a case or pedestal surmounted by a clock which
gives motion to a paper cylinder like that used for an indicator. On the one side
of this is a graduated scale along which an index reciprocates, this index being
connected by a rod or cord to a reciprocating part of the engine or pump or to a
lever or pulley worked by it so as to shew to a reduced scale the length of stroke.
At the other side of the paper cylinder is another graduated scale along which
moves an index carrying a pencil that traces a line on the revolving paper
cylinder. This index through ratchet and pawl or other suitable gear receives
onward motion from the reciprocating index so that the line traced on the paper
indicates the space passed over by the pump piston and consequently, the scale,
being properly adjusted, it registers the quantity of water pumped in a given time,
division lines on the paper shewing the time. In the lower part of the pedestal
the level of the water in the well is shewn by the height of a column of mercury
in a glass tube bent to the form of a U. One limb of the U is open at the top, the
other limb is connected to a pipe that descends into the well and has an open
mouth at a low level therein The pressure of the water column above the mouth
of the pipe compresses to a certain extent the air in the pipe and this pressure
communicated to the mercury depresses it in the one limb of the U tube and raises
it in the other limb, the difference of level as shewn on a graduated scale being
proportioned to the height of water in the well above the mouth of the pipe. In
order to obtain a correct indication a small air compressing pump attached to the
pipe is worked by hand till the mercury attains its maximum difference of level.
The scale may be adjusted by direct trial and in that case the air pump may be
dispensed with. In order to reduce the error of indication the lower end of the
pipe which is immersed in the water is expanded in bell form.
DESCRIPTION OF THE DRAWINGS
Fig 1 is a general front view of the combined apparatus above described; Fig 2
is a part vertical section and Fig 3 a sectional plan to an enlarged scale shewing
the mechanism for working the indicators. A rod a reciprocating vertically in
time with and through a stroke proportioned to that of the pump piston has on it
a pointer shewing the strokes and pointing on a scale to the extent of each
stroke should they vary. A pawl on the rod a engages with the teeth of a ratchet
wheel c on a spindle b, a worm on b engages with a worm wheel on a spindle d
from which motion is communicated by toothed wheels e f to a spindle g. A
worm on g engages a worm wheel on a spindle h, and a worm on h engages a worm
wheel on a spindle k; the movement imparted to the ratchet wheel c by the
reciprocating rod a is thus greatly reduced. On the spindle k is fixed a pinion m
gearing with rack teeth on a vertical rod i which carries the pencil or tracer o

page_text: By means of a rod n the pinion can be shifted laterally out of gear with the
rack on the rod i which can then drop to its initial position. The pencil or
tracer o marks the diagram on a paper cylinder 2 which is divided by vertical
time lines and is driven by gearing from a clock q. In the lower part of the
pedestal is situated the gauge tube a bent to a U shape with mercury in its bend.
The one limb t is connected as above described to a tube descending into the well,
and the other limb v is open at the top. The height of the mercury in this limb
shews on a suitable scale the height of water in the well above the mouth of the
pipe that descends in it. As the pressure of this water column is communicated to
the mercury by the greater or less compression of the air in the communicating
pipe, the quantity of air in the pipe may from time to time be adjusted by forcing
air into it by the small hand pump w, all surplus escaping through the water in
the well.
Having thus described the nature of my invention and in what manner the same
is to be performed, I claim :-
First, The combination of a paper cylinder or receptive surface moved by clock-
work with a pencil or tracing point moved by gearing from the reciprocating
piston of a pump, so arranged as to produce a diagram indicating the quantity of
water pumped in a given time, substantially as herein described.
Second. The construction of well gauge consisting of a bent tube containing
mercury and connected by one of its limbs to a pipe immersed in the well so
that the mercury is subject to the pressure of the water column above the mouth
of the well pipe communicated by compression of air in the communicating pipe
substantially as herein described.
Third. The combination in one instrument or apparatus of a clock working the
diagram cylinder, the gearing for moving the tracer, a reciprocating index shewing
the time and length of stroke and the well gauge, substantially as herein
described.
In witness whereof I the said Henry Davey have hereunto set my hand and
seal this eighth day of August in the year of our Lord One thousand
eight hundred and eighty-two.