US630613A - Spraying device. - Google Patents

Description

No.630,6l3. Patented Aug. 8, |899. G. W. LISK. sPnAYlNG DEvIcE.

(Application led Nov. 9, 1898.)

(No Modal.)

f UNITEDvv STATES" PATENT OFFICE.

GEORGE Wi LISK, OF CLIFTON SPRINGS, NEV YORK.

SPRAYING DEVICE.

SPECIFICATION forming part of Letters Patent No. 630,613, dated August 8, 1899. Application iiled Novem'berr9,1898.' Serial IND. 695,982. `(No model.)

To all whom it may concern,.-

Be it known that I, GEORGE W. LISK, a citizen of the United States, residing at Clifton Springs, in the county of Ontario and State of New York, have invented a new and useful Improvement in Spraying Devices, which iinprovement is lfully set forth in the following specification andshown in the accompanying drawings;

Hand spraying devices in common use, consisting of a pump and reservoir attached and provided with'l means for drawing out and atomizing the liquid, have been found to act imperfectly and be to some extent objectionable. In these sprayers the liquid to be at' omized is liable not to present itself for atomization with sufficient promptness when the stroke of the plunger of the pump begins, on account of which the plunger frequently moves some distance before the jet of spray is produced. lThis distance moved by the plunger amounts really to a lost motion for the pump at each stroke of the plunger.y There is also in using these sprayers as heretofore constructed a considerable loss of the liquid in the form of a drip that is not atomized at or near the end of the forward or down stroke of the plunger.

To remedy these and other objections in the sprayers heretofore in use is the object of my present invention.' To overcome these difliculties, I construct the sprayer so that a jet of airis forced by the plunger into the reservoir holding the spraying liquid, which serves to cause the liquid to be promptly presented to be atomizedat the starting of the plunger of the pump. Meansare also provided for reducing thev outiow of the liquid to be atomized as the Vplunger lapproaches the end of its stroke, so as to reduce or avoid al# together the drip and waste liable to occur at that point. Means are also providedfor more readily supplying the reservoir with' the liquid.

The invention is hereinafterfully described, and more particularly pointed out in the claims.

Referring to the drawings, Figure l is a side elevation of the' device, parts being broken out. Fig. 2 is a frontend view indicated by arrow 2 in Fig. l. Fig. 3 is a side sectional i elevation of parts at the front end of the de,-

vice. Fig. llis aside elevation of the detachable funnel. Fig. 5, drawn toa larger scale, is a transverse section of parts taken on the dotted line 5 5 in Fig. l. Fig. 6 is a detached view showing more clearly therelation ,between the funnel and supply-tube. Fig. 7 is a detached view showing another use of the funnel.

Referring to the parts shown, Bis the pump-,I

of the usual kind in these devices, containing a plunger a, Figs. l and 5.

. T is the reservoir forholding the spraying liquid, the pump and the reservoir being rigidly joined by solder or otherwise. a The pump is formed with a reduced or conical part b at its forward end over the reservoir, to which is rigidly secured a cylindrical thimble c, the reduced end of the pump opening into the in` terior of the thimble. A tube d for conducting the liquid to be atomized is secured to both the reservoir and the thimble in an inclined position, opening at its lower end into the interiorof the reservoir, near the bottom, and at its upper end in the thimble just forward of the reduced open end of the pumpbarrel. The parts are placed so that the axes of the pump and the tube are in a plane, and their adjacent'open ends are arranged for the purpose of causing the liquid drawn up through the tube when the plunger is forced downward in the barrel to' be broken into spray by the current of lair forced out of the ump.

A' funnel A is employed for shielding and giving direction to the jet of spray, its reduced end being adapted to pass into the forward end of the thimble, as shown, and held to place by friction. This funnel is detachable from the thimble, and it is formed at one sidel of its reduced end with a slit e, Figs. 4 and 6, to avoid or make room for the upper end of the tube d when the funnel is inserted in the thimble. When the funnel is in place in the thimble, its axis and the axes of the thiinble and the barrel are in a line.

C, Figs. 1, 2, and 5, is a tube inclosing an air-passage leading from the interior of the pump-barrel to the interior of the reservoir.

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To control this air-passage, a stopper' or valve g is employed. The form or construction of this valve or stopper is not essen tial to the invention, its function being sim ply to regulate the capacity of the passage or close it altogether. As shown, the openingf of this airpassage into the reservoir is reduced and iliade conical or liarin g at its upper end, the adjacent end of the valve g being correspondingly tapered. This stopper is threaded in the upper end of the tube C, so that it may be turned down by the operator to close the passage into the reservoir or turned upward to open said passage more or less, as may be required. Now if the air-passage be open and the plunger of the pump be forced downward a stream of air will be forced into the reservoiroverthecontainedliquid. This produces a pressure upon the surface of the liquid, causing the latter to quickly rise in the tube d and so readily respond to the action of the plunger when the latter is first started downward in the barrel. By this means no motion is lost to the plunger at the start, the jet of spray beginning to issue from the sprayer as soon as the plunger starts.

When the sprayer is not being used-as, for example, while being carried to or from the field of operation-the stopper gis turned firmly down to close the opening at f, thus preventing the liquid from escaping into the barrel at that point.

The opening h of the air-tube C into the pump-barrel is purposely made at some distance above the lowest point reached by the plunger, so the latter will pass below the opening in its downward stroke. On account of this the air-pressure upon the liquid in the reservoir Will be cut od or cease before the plunger completes its downward stroke. By this means the flow of liquid up through the tube d will be considerably diminished after the plunger passes the opening hand until it reaches the end of its stroke. This diminished ow of the liquid serves to prevent the occurrence of the drip and loss of the liquid that would otherwise be liable to occur at the end of the stroke of the plunger. In this construction of the sprayer the tube d is made smaller than in similar sprayers, as the. flow of the liquid through it is materially quickcned by this action of the pump. 0n account of this reduced caliber of the tube there is but a small quantity of the liquid delivered by it after the plunger passes the opening 71, ot' the air-tube, as stated.

By adjusting the stopper or Valve g the flow of air through the tube C may be regulated for the purpose of controlling the amount of the liquid passing through the tube (Z and the spray thrown from the device.

The ordinary capped opening D is provided,

is a great convenience, as an extra funnel does not have to be carried for the purpose.

What I claim as my invention is- 1. A sprayer comprisinga reservoir,a pump and a tube leading from the interior of the reservoir and terminating in operative proximity to the discharge end of the pump, of an air-tube piercing the pump intermediate of its ends and leading to the interior of the rcservoir, substantially as specified.

2. A sprayer comprising a reservoir,a pump, and a tube leading from the interior of the reservoir and terminating in operative proximity to the discharge end of the pump, of means for compressing air within the reservoir during a portion of the pump-stroke and for relieving such compression during another portion ot said stroke,substantially as specilied.

3. A sprayer comprising a reservoir, a pump having a discharge-nozzle at one end, a tube leading from the interior of the reservoir and terminating at the discharge end of the pump, a pump-piston and an air-tube communicating with the interior of the reservoir and piercing the pump at a point intermediate of the limits of the piston-stroke, whereby air within the reservoir will be compressed during a portion of the piston-stroke, and will be permitted to reenter the pump behind the piston as the latter is nishing its stroke, substantially as specified.

4. A sprayer comprising a reservoir,a pumpcylinder having a discharge-opening at one end, a tube leading from the interior of the reservoir and terminating in operative proximity to said opening, a tube leading from the reservoir and piercing the pump-cylinder at a point intermediate ot' the limits of the piston-stroke, said tube being un-check-valved to permit the passage of air through the tube in opposite directions during different portions of the stroke of the pump-piston, substantially as specified.

5. Asprayercomprisingareservoir,a pump provided with a discharge-opening in one end, a tube leading from the interior of the reservoir and terminating adjacent to said discharge-opening, a tube leading from the reservoir and piercing the pump at a point intermediate of the limits of its piston-stroke and in a direction substantially at right angles to the movement of the piston, and an adjustable controlling-Valve within the said lastnamed tube, substantially as specified.

G. A device of the kind described consisting of an air-puin p reduced at its forward end, in combination with a reservoir secured to the pump, a cylindrical thimble secured to the reduced end of the pump, and a liquidsupply tube held by the reservoir, the pump and the supply-tube opening into the interior of the thimble, and a detachable funnel held by the thimble, substantially as shown and described.

7 A sprayer comprising a reservoir, a pump,

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In witness whereof I have hereunto set my hand, this 3d day of November, 1898, in the lo presence of two subscribing witnesses.

GEO. W. LISK;

Witnesses:

GEORGE THOMSON, MARY Ti-ioMsoN.

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