Improvements in Motors for Operating Pumps.
Year: 1894

page_text: Date of Application, 8th May, 1894-Accepted, 16th June, 1894
COMPLETE SPECIFICATION.
Improvements in Motors for Operating Pumps.
I LOUIS HENRY LLOYD, a citizen of the United States of America, residing at
Lincoln, County of Logan, State of Illinois, United States of America, Farmer,
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:-
In the drawing,
Fig. 1 is a side elevation of my improved motor;
Fig. 2 is a plan view thereof, the vertical ways being shown in cross section, and
Fig. 3 is a detail horizontal section hereinafter described.
Fig. 4 is a detail side elevation showing the parts in a different position from
that shown in Fig. 1.
This invention relates to a motor or mechanism for vertically reciprocating
pump-rods, the design of it being to provide simple mechanism for utilizing the
gravitating force of a suspended weight for imparting a regular movement to the
pump-rod, the speed and regularity of the mechanism being governed and assisted
by the swinging motion of a pendulum as hereinafter fully described.
In the drawing annexed the numeral designates a suitable frame which supports
a pair of vertical ways or guides 2 between which is adapted to vertically work a
suitable weight 3. Attached to the weight is a cable 4 which passes up over a
pulley 5 journalled at the upper ends of the ways and then down and around
a drum 6 secured on a shaft 7 journalled in said frame 1. Secured on shaft 7 is a
spur gear 8 which meshes with a pinion 9 carried by a shaft 10 journalled above
said drum, said shaft 10 being operated to wind the rope or cable upon the drum
by means of a sprocket wheel 11 secured on one of its ends, this sprocket wheel
carrying a sprocket chain 12 which also passes over a smaller sprocket wheel 13
secured on a stub-shaft journalled in the frame below. The sprocket wheel 13 and
the chain are driven by means of a hand crank 14 removably secured on the end
of the stub-shaft.
Secured rigidly on the shaft 10 is a ratchet wheel 15, and pivoted on the frame
adjacent to this ratchet wheel is a hook-pawl 16 which extends over the upper edge
of the ratchet wheel and is normally kept out of engagement with the teeth thereof,
by means of a depending weighted arm 17 extending below the ratchet wheel and
normally resting on a stop 18. Pivotally swung on shaft 10 in front of the ratchet
wheel is a pendulum 19, whose upper end extends above the ratchet wheel and
carries a pivoted pawl 20 which is provided with an upwardly extending weighted
arm 21. An adjustable stop 22 is secured on the upper end of the pendulum and
extends into the path of the throw of said weighted arm 21 and serves to limit its
movement. Carried by the pendulum below the ratchet wheel is a lateral arm 23
which is adapted to come in contact with the weighted arm 17 of pawl 16 at a
predetermined point in the swing of the pendulum, said arm being adjustably
secured to the pendulum in order that it may be set so as to strike the weighted
arm at the proper instant. Carried by the pendulum and working on the end of
shaft 10, in front of the ratchet wheel, is a sleeve 24 which carries at its outer end
a lateral arm 25, which is provided with a series of holes to enable it to be adjustably
connected to the pump rod 26.
It will be observed that the tendency of the weight 3 is to rotate the ratchet
wheel 15 in the direction of the arrow thereon, through the medium of the cable
and the train of gearing, the rotation of the ratchet wheel being prevented by
pawl 20. To start the mechanism it is simply necessary to start the pendulum to

page_text: swinging, which may be done by taking hold of the pendulum with the hand or by
means of the crank and sprocket chain. As the pendulum swings to the right
arm 23 carried thereby, at the proper instant strikes arm 17 and engages pawl 16
with the ratchet wheel and thereby locks the ratchet wheel against rotation; as
soon as pawl 16 engages the ratchet wheel it releases pawl 20 from the pressure of
the ratchet wheel, whereupon the weighted arm 21 falls against stop 22 by gravity
and thereby disengages said pawl 20. The pendulum is then free to swing towards
the left, in which movement it is assisted by the dropping or falling of the pump
rod; as the pendulum swings to the left the pawl 20 is automatically thrown back
into engagement with the ratchet wheel by means of the weighted arm 21 as soon
as the pendulum passes the centre. When the pawl 20 thus falls into engagement
with the ratchet wheel it strikes the same with sufficient force to relieve for an
instant the pressure against pawl 16, whereupon said pawl 16 automatically and
quickly swings up out of engagement with the ratchet wheel, thereby permitting
the force exerted by the ratchet wheel through the medium of pawl 20 to swing
the pendulum to the right and lift the pump rod. These operations are repeated,
as the pendulum swings back and forth, until the weight reaches the limit of its
downward movement. When the desired quantity of water is pumped, the operation
of the mechanism is stopped by taking hold of the pendulum and holding it still an
instant. It may be started again at any time by giving the pendulum a sufficient
swing to the left to relieve pawl 16 and let it swing up out of engagement.
In order to increase the storage of power and thereby render the pump self-
operating for a greater length of time the machine may be so arranged that the
weight may pass down into the well or into an opening at the side of the well, as is
evident. In this way sufficient power may be stored up to last a comparatively
long time, according to the quantity of water used.
It will be observed that the specific construction of the parts may be varied
without departing from the spirit or scope of the invention.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a device for imparting a reciprocating movement to a pump-rod or other
device, the combination of a frame, a gravitating weight, a drum and cable connected
to said weight, a ratchet wheel driven by said drum, a pendulum pivotally mounted
adjacent to said ratchet wheel, an automatic pawl carried by said pendulum and
movable thereon and engaging the ratchet wheel, whereby the force exerted by the
ratchet wheel is communicated to the pendulum, an arm connected to the pendulum
and adapted to be connected to the pump-rod or other device, and means carried by
the frame for automatically engaging the ratchet wheel and stopping its rotation
when the pendulum reaches the limit or nearly the limit of its swing in one direction,
substantially as described.
Dated this 8th day of May 1894