An Improved Spraying Apparatus or Pump for Agricultural and other purposes.
Year: 1897

page_text: Date of Application, 2nd Dec., 1897-Accepted, 19th Feb., 1898
COMPLETE SPECIFICATION.
An Improved Spraying Apparatus or Pump for Agricultural and
other purposes.
I, GEORGE FREDERICK STRAWSON, of Horley, Surrey, Manufacturer, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement: —
This invention relates to an improved spraying apparatus for agricultural and
other purposes and it has for its object to produce an apparatus for such purposes
that shall be inexpensive, simple in construction and at the same time efficient
in its action.
The apparatus consists essentially of a suitable container or reservoir of any
convenient form to hold the liquid with which it is desired to treat the various
objects or the like and has provision made therein for carrying the same which
provision permits of the container being slung upon the operator's back. Inside
the container and at or near the lower end or base of the same is a horizontal
partition having a ring of suitable metal secured thereto upon the underside, an
opening being formed in the said partition of a size corresponding to the inner
diameter of the ring. The ring aforesaid is provided with a number of holes to
receive screws which pass through holes formed in the flanges of a suitable well
between which flange and the ring aforesaid is clamped a diaphragm of rubber.
The rubber diaphragm aforesaid is perforated in the centre to allow of the passage
therethrough of a screwed nipple or coupling which may form part of a small
circular plate of metal. Engaging with the ring and situated upon the upper
side of the rubber diaphragm is a nut which serves the double purpose of securing
a circular plate having its outer periphery turned up to prevent injury to the
diaphragm when the apparatus is being operated and connecting the whole to
the lower end of the delivery tube. The circular plate aforesaid has upon its
under side a shoulder of sufficient depth to receive a rubber ring and a metal
ring of smaller diameter than the said ring. To keep the two rings in position a
cap is provided which may be screwed upon a nipple formed upon the lower end
of the circular plate before referred to. The cap is perforated at the bottom and
forms a chamber for a ball or other valve, a seating of rubber or the like being
also provided. A suitable stop is provided to keep the valve in its chamber.
The discharge tube before referred to passes upwards to the top of the reservoir
and has secured to it in any suitable manner a circular chamber through which
the tube passes, a hole being formed to allow of the overflow from the tube pas-
sing into the chamber where it compresses the air and serves to make the discharge
regular.
The top of the discharge tube is furnished with an enlarged hollow plunger
which passes through the top of the reservoir, to which a guide is secured, and has
an orifice by which the delivery hose or the like is connected. The top of the
lunger is slotted to receive a suitable lever for actuating the same and a pivotted
upport is also provided to keep the rod in position whilst being operated,

page_text: In order that the invention may be the better understood drawings are appended
in which:
Fig. 1. is a back elevation partly in section.
Fig. 2. is a plan.
Fig. 3. is a sectional view showing more clearly the construction and arrange-
ment of air chamber and other parts.
Fig. 4. is a plan of the underside of the diaphragm, the well being removed.
Fig. 5. is a plan showing more clearly the underside of the perforated ring.
Fig. 6. is a detailed sectional view showing approximately the position of the
various parts at the commencement of the up stroke.
A, is the container which may be made of any suitable material or metal and
may be of any desired form but preferably that shown by the drawings in Figs. 1
and 2.
B, is the bottom of the reservoir which has formed in it at one side a circular
hole and to the under side of which is secured a metal ring C, having holes formed
therein to receive the screws D), which pass through the flange of the dished well E,
and which serve to clamp between the said flange and the ring C, the rubber
diaphragm F, holes G, being formed therein to permit of the passage of the
screws D, aforesaid. The rubber diaphragm is perforated in the centre to receive
the screwed nipple H, which forms part of the plate I, which has a shoulder J,
turned or otherwise formed upon its under side and upon which rest a small rubber
ring K and the metal ring L, which is held in position by the cap M, which is
provided with an internal thread to engage with a corresponding thread formed
upon the nipple or extension N, on the underside of the plate I. The cap M, is
perforated and carries a suitable seating of rubber O, for the ball P, to keep which
in its place a stop Q, is provided which may consist of a piece of wire placed across
the bore. Situated upon the upper side of the diaphragm F, is a disc or plate R,
having a central opening of sufficient size to allow of the passage therethrough of
the nipple H, with which engages a nut S. The plate R, is turned up at its outer
periphery to prevent injury to the diaphragm when the apparatus is being operated.
Both the plate R, diaphragm F, and plate I, are perforated as shown in the draw-
ings Figs. 3 to 6, Sheet 2, at T, to allow of the free passage of the liquid in the
container to the well E, when the diaphragm F, is raised the approximate positions
of the said diaphragm in its raised and depressed positions being indicated by
thick dotted lines in Fig. 3.
U, is the discharge tube which as shown in Figs. 3, and 6, is connected by means
of a thread or in any other suitable manner to the nut S, and has secured to it
at a suitable distance from the said nut a suitable air chamber V, through the
centre of which the said tube passes, the chamber being hermetically closed except
for the small orifice W, formed in the tube U, which thereby allows the liquid
to escape into the said chamber where it compresses the air, giving a regular
discharge.
To the lower end of the chamber V, is secured a piece of metal W¹, having
secured thereto another piece of metal a projecting horizontally into the reservoir
and which I prefer to call an agitator, its object being to agitate or mix the con-
tents of the reservoir to prevent any deposit or sediment. The tube U, is continued
above the air chamber V, and has attached to it a hollow rod b which works in a
guide c attached to the strengthening plate d, Figs. 1 and 2. The upper end of
the rod b is slotted as shown at e Figs. 1 and 3 to receive the end of a lever f for
which a pivotted fulcrum g is provided, the said fulcrum being pivotally secured
to the plate d. The upper end of the hollow rod 6 has an orifice h which may be
provided with a suitable thread for a hose coupling indicated in dotted lines in
Fig. 2.
The reservoir A, is provided with an opening i at the top as shown in Fig. 2,
and may in addition to the cap j be provided with a strainer k. To strengthen
the body of the reservoir the same may have formed in it at suitable intervals
apart a series of small horizontal flutes or beads m which may be arranged upon

page_text: the body at such intervals as to indicate the quantity of liquid therein and thereby
facilitate the admixture of the various proportions of elements forming the
medium contained by the reservoir.
n is a belt which as shown in Fig. 1, engages with a buckle p attached to the
reservoir A, and passes through the metal band o Fig. 1, and may have a hook at
the other end to engage with the extension A', upon which the body A, is
supported.
The action of the machine is as follows:
On raising the lever f the rod b and tube U, are depressed carrying with it the
chamber V, and agitator and at the same time depressing the rubber diaphragm F,
causing the liquid in the well to pass through the orifice O, to the tube U, where
a certain portion passes through the hole W, in the tube to the chamber V, the
rest passes up the tube to the opening in the rod and thence through the discharge
hose or the like connected thereto. Upon the return movement of the plunger
the air pressure in the chamber V, expels the liquid therein keeping up the flow
whilst the rubber ring K is caused by the combined pressure of liquid in the
reservoir and the vacuum produced upon the underside of the diaphragm to assume
approximately the position indicated in Fig. 6, allowing the liquid to flow from
the reservoir A, to the well through the orifices T, the back pressure keeping the
ball valve upon its seating. The well being situated below the level of the bottom
of the reservoir allows the whole or nearly the whole of the liquid to be utilised.
It is obvious the whole of the internal mechanism is easily withdrawn on removing
the external well and disconnecting the handle, hose and agitator.
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. The improved spraying apparatus or pump for agricultural and other
purposes constructed arranged and operating, substantially in the manner specified
and shewn by the accompanying sheets of drawings.
2. In a spraying device for agricultural and other purposes a rubber diaphragm
in combination with suitable valves for effecting the discharge of liquid, sub-
stantially as herein described and shown by drawings appended.
3. In a spraying apparatus or pump for agricultural and other purposes a device
for agitating or mixing the contents of the reservoir, substantially as described
and shown by the drawings hereto appended.
Dated this 2nd day of December 1897