Improvements in and connected with Pump Equalizers or Counterbalances.
Year: 1899

page_text: COMPLETE SPECIFICATION.
Improvements in and connected with Pump Equalizers or
Counterbalances.
I, JOSEPH WILLMANN, of Solms, in the County of Copal and State of Texas,
United States of America, Gentleman, 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:-
My invention relates to an equalizer for windmill operated pumps; and the
object in view is to provide a mechanism adapted for use in connection with an
ordinary pump and any style of windmill by which the power of the mill is
assisted in lifting the weight of the column of water in the pump.
In the operation of ordinary pumps or mills, a considerable portion of the mill's
power is exerted in lifting the weight of the pump-rod, and this weight added
to that of the liquid column in the pump requires the expenditure of considerable
mill-power in performing mechanical work which, from the stand-point of my
invention, is overcome.
My equalizer is combined with a pump-rod in a manner to normally counter-
poise the weight of said pump-rod and to lift the same, thus requiring the
pump-rod to be depressed by the mill-shaft, but on the upstroke of the pump-rod,
the equalizer lifts the weight of said rod, so that the mill is only required to lift
the weight of the liquid column in the pump.
The operative elements of my equalizer are so combined as to exert the power of
two counterpoised levers at a single point on the pump-rod, and the counter-
poises or weights of said levers are shiftable to vary the lifting effect of the levers,
so that the equalizer may be adjusted to vary the lifting effect of the pump
according as it is to be used in wells which require water to be lifted at varying
distances.
The invention consists in the novel construction and arrangement of parts,
which will be hereinafter fully described and claimed.
To enable others to understand the invention, I have illustrated the same in
the accompanying drawings, forming a part of this specification, and in which
Figure 1 is a side elevation illustrating my equalizer applied to a pump-rod
which is to be actuated by a windmill.

page_text: Figure 2 is a vertical sectional elevation on the plane indicated by the dotted
line 22 of Figure 1.
Figure 3 is a horizontal section on the line 3-3, of Figure 2.
Like numerals of reference denote like and corresponding parts in each of the
several figures of the drawings.
10 designates a tube or pump-stock forming a part of an ordinary well, and 11
is the pump-rod, which passes through the tube and is adapted to be connected
with any type of windmill. As the pump and the mill do not constitute any part
of the present invention, I have not deemed it necessary to particularly illustrate
or describe said parts.
To adapt my equalizer for use in connection with the pump-rod 11, I provide a
supporting-clamp 12, which is fastened directly to the tube or stock 10. This
clamp consists of an armed plate 13, a yoke 14, and a brace-plate 15. The plate 13
of the supporting-clamp is provided at its lower end with lateral arms 16, and said
arms are perforated for the reception of the threaded ends of the yoke 14. The
plate 13 is bent or curved, as at 17, to provide a seat by which the plate may be
applied firmly to the tube or stock 10, and, as shown by Figure 3, this plate is
designed to be fitted against one side of the tube 10, while the yoke 14 embraces
the other side of the tube in a manner for its ends to pass through the arms 16
and receive the nuts 18, by which the clamp may be firmly attached to the tube 10.
The brace-plate 15 lies parallel to the vertical plate 13, and its lower end is
bent inwardly for secure attachment by a rivet or bolt to the plate 13 at the
lower edge thereof. A. space is provided between the plates 13, 15, of the
supporting-clamp to receive the crossed portions of weighted levers, and this
space between said plates is spanned by a fulcrum-bolt 19, which passes through
the crossed portions of said levers and through suitable openings in the upper
ends of the plates 13, 15.
The levers 20 21 are bent at points intermediate of their length, as at 22, to
enable them to cross each other and to fit properly in the space between the
plates 13 15 of the supporting-clamp, whereby said levers are adapted to lie
compactly in the clamp and to be fulcrumed thereon by a single bolt 19. These
levers are fitted on the bolt at points intermediate of their length to provide the
short and long arms, and the long lever-arms carry the weights 23. Said weights
are fitted loosely on the long arms of the levers, so as to be shiftable or adjustable
lengthwise, and each weight is provided with a binding-screw 24, that is fitted in
a threaded opening of the weight and is adapted to bind against the lever. The
short arms of said weighted levers are attached to the links 25 26 by the pivots 27,
and these links are pivoted individually to their respective levers, while the
upper ends of the links are attached at a common point to the pump-rod 11 by
a single attaching-bolt 28. This bolt passes through the lapped upper ends of
the two links, a washer 29 and a brace 30. The washer 29 is interposed between the
pump-rod and one of the links to obviate abrasion and wear on the parts, and
the brace 30 is arranged above the links, so as to have its lower end overlap one
of said links. The brace is disposed in a vertical position substantially above
the bolt 28 for the purpose of fastening the upper end of said brace to the pump-
rod by a bolt or rivet 31.
The
My equalizer may be attached to any ordinary pump or windmill.
weighted levers tend normally to lift the pump-rod, and they serve to
sustain the weight of said pump-rod and a fraction of the weight of the
liquid column which is to be lifted by the mill. The operation of the
apparatus requires the mill-shaft to depress the pump rod against the
lifting action of the weighted levers; but on the upstroke of the pump-rod,
said levers assist the mill in raising the rod and the liquid column, whereby the
equalizer performs a part of the labor in lifting the rod and the water and the
strain is reduced proportionately on the operative parts of the mill. In deep
wells which require water to be litted to a considerable height the weights are
moved toward the outer ends of the long lever-arms, so as to increase the leverage

page_text: and lifting effect of the equalizer; but in wells in which the water rises nearly to
the top of the tubing, it is not necessary for the equalizer to exert so much
leverage on the pump-rod. Hence, the weights can be moved inward toward the
fulcrum of the levers.
By bending the levers at 22 and attaching the links to opposite sides of the
levers, the operating parts of the equalizer are arranged to move past one another,
and thus any desired stroke or movement of the pump-rod may be attained
without interference of the working parts one with the other.
Changes may be made in the form of some of the parts, while their essential
features are retained and the spirit of the invention embodied. Hence I do not
desire to be limited to the precise form of all the parts as shown, reserving the
right to vary therefrom.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
1. The combination with a tube, of a support fastened thereto, weighted levers
mounted on said support by a fulcrum-bolt which is common to both levers, and
links pivoted individually to said levers and having a common connection with
a pump-rod, substantially as described.
2. The combination with a tube, of a supporting-clamp attached to said tube,
a single fulcrum-bolt supported by the clamp, the crossed levers fulcrumed on
said bolt, the shiftable weights clamped to said levers, a reciprocating rod, and
links pivoted individually to short arms of the levers, and having a single
pivotal connection with said rod, substantially as described.
3. In an equalizer for pump-rods, a supporting-clamp consisting of a bent
armed plate, a yoke having its ends connected to the arms of said plate, and a
brace fastened to the plate, in combination with bent levers having their short.
arms crossed within the space between the plate and brace of said clamp, a
fulcrum-bolt supported in the clamp and passing through said levers, the counter-
poise weights on the long arms of said levers, a pump-rod, and a pair of links
pivoted individually to short arms of the levers and having a single pivotal con-
nection with the pump-rod, substantially as described.