IMPROVEMENTS IN GEARING FOR FORCE PUMPS
Year: 1884

page_text: COMPLETE SPECIFICATION.
I AUGUSTUS FREDERICK NAGLE of Chicago County of Cook, State of Illinois
United States of America, Civil Engineer do hereby declare the nature of this
invention for " IMPROVEMENTS IN GEARING FOR FORCE PUMPS" and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement: -
My present invention relates to Force or Pressure Pumps; and consists essentially
in the peculiar manner of connecting the plunger with the driving mechanisın,
whereby the lateral thrust upon the plunger is balanced at all points of the stroke;
to accomplish this the upper end of the plunger is provided with a bean secured
at right angles therewith, each end of the beam having a pin adapted to engage
with a link or connection, which, in turn, is connected with the crank pin of a
geared shaft all as will be more fully hereinafter set forth.
The object of this invention is to produce a pump having a balanced' pressure or
thrust, exterior to the packing, at all portions of the stroke, and at the same time
being more efficient, combined with reduced cost, as compared with the commonly
used pumps having cross head and guides.
In the accompanying sheet of drawings Figure 1. represents a front elevation of
a single acting pump provided with my iniprovements, the plunger being shown
about midway in its upward or suction stroke, Figure 2' represents a side view of
the same.
The following is a detailed description of the invention A in the drawings,
represents the frame or standard of the pump to which all the parts are secured;
p is the bearing for the driving shaft, the latter being provided with fast and loose
pulleys c. c and pinion E as common. p. p. represent bearings or boxes formed
one on each side of the centre and at the top of said frame; F. F are gears secured
to or mounted upon the shafts F¹, said gears being of equal size, meshing together,
and adapted to receive rotary motion by means of said pulley and pinion.
Crank pins h¹ are secured to the gears F, the location of the former corresponding
to the stroke of the plunger.
B is the pump-barrel provided with inlet and outlet passages a a¹ and check
valves as common.
Trepresents the plunger working in said barrel the upper end of the former is
embraced by a beam H. the latter preferably being made in two parts and secured

page_text: together by pins hh'; the length of the beam being represented as corre-
sponding to the distance between the shafts F', links I serve to connect said gears
and plunger.
It is now evident that the revolution of the driving-shaft, in the arrow-direction,
imparts rotary motion to the shafts F by means of said gears E. F F the latter,
in turn, adapted to connect with the plunger by means of said links I all as fully
shown.
It is further apparent that by means of this improved device the thrust upon
the plunger is balanced laterally at all points of the stroke; thus adapting the
plunger to move in a true vertical direction thereby resulting in increased efficiency
and diminished cost.
I do not limit myself to the use of gears and beam having the proportionate
ratio shown as I contemplate making the beam centres less than the distance
between the gear centres thereby giving to the down stroke, in case of great
pressure, less angular thrust.
Neither do I restrict myself to the exact construction of the frame and adjacent
parts represented herewith, as they may be modified without departing from the
spirit of the invention, but, however, in any case I desire to retain the device
embodied by the two cranks moving in opposite directions, and the plunger
provided with means for connecting said cranks, for the purpose of balancing or
neutralizing the lateral thrust of the plunger.
This device may be adapted for use in double-acting pumps or even in other.
machines susceptible of its application, such for instance as presses working a
reciprocating plunger or die; I prefer in such cases to make the beam and plunger
integral.
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
:
First. The device for converting rotary motion into reciprocating motion herein
described, consisting of two oppositely revolving geared-crank-shafts suitably
mounted and driven in combination with the head or plunger having lateral wings
and links for connecting said cranks and plunger, the whole arranged in the same
plane and adapted for use substantially as shown and for the purpose set forth.
Second. The driving arrangement for pumps, or other analogous mechanism
herein provided, consisting of two meshing crank gears F links I beam H and
plunger T the whole combined and arranged substantially as shown and for the
purposes set forth.
Third. The combination in a force pump provided with the barrel, valves and
frame, substantially as herein shown, of the two oppositely revolving crank gear
.wheels F links I and plunger T the latter being secured to the beam H adapted to
receive said links, the whole arranged whereby the rotary motion of said wheels F
imparts reciprocating movement to the plunger the thrust upon the latter thereby
being balanced at every point of the stroke, as and for the purposes set forth.
Dated this 17th day of December 1884