US2109589A - Liquid pistol - Google Patents

Description

March 1, 193\8. N. G. HoRwlTT ET Al. 2,109,589

LIQUID PISTOL Filed oct'. 6, 1936 ATTORNEY Patented Mar. 1, 1938 Nathan George Horwitt and Norman Dine, New

York, N. Y. Y

Application october c, 193e, serial N..1o4,1ss

11 claims. This invention relates to a. liquid vpistol for use Ain spraying insecticide or other desired liquid. An object of the present invention is to provide a pistol where the stock of the pistol is the'- original liquid container itself in which the liquid is sold, instead of being a more or less xed magazine which must be lled with the liquid from such containers when the liquid is used up.`

l04 'Ihe container, in accordance with the present invention is readily attached to form the stock of the pistol and readily removable, so that when it is empty, it can be replaced with a. full container, instead of having to bother to fill a fixed l5 magazine as has been the practice heretofore.

-Such filling is usually accompanied by unwanted spilling and the danger of nre involved where inflammable liquid is poured. Thecasing of the pistol is provided with a special socket for firmly tting over the container which is fastened into place by means of a thumb nut loosely mounted for rotation on the casing. A part of the thumb nut is a screw cap which is adapted to be screwed on the screw neck usually provided on such containeI'S.

The vconstruction disclosed provides a compact device of pleasing appearance and low cost. It is operable with one hand making it quick and easy to operate, enabling it to be brought nearer the object to be sprayed and with better control and aim than devices requiring two hands.

Other objects and advantages will become apparent upon a further study of Athe specification and drawing, in Which:- Fig. 1 is a vertical longitudinal section through the spray gun.

Fig. 2 is a. partial cross section taken along the line 2-2 of Fig. 1.

line 3-3 of Fig. 1.

Fig. 4 is an end elevation looking along the line 4-4 of Fig. 1, and

Fig. 5 is a cross section taken along the line 5-5 of Fig. 1.

The casing of the gun is made up of halves 6 and 1, held together by a number of rivets such as those shown at 8.

Inside of casing 6 and 'I is mounted a-'chamber or cylinder 3, From an opening at the rear of cylinder 9 a tube I0 extends into the heel of the gun. The rear of tube I0 is connected by' a piece of flexible tubing II, with the top of a substantially vertical tube I2. An upper flange I3 and a lower flange I4 are mounted with a 5 5 forced t in spaced relation near the upper endv (ci. 22h-31.5)v

of tube I2. Just inside'of each flange and around tube l2 is a flexible gasket I5. A screw cap I6 is loosely' mounted onv tube I2 between gaskets I5.

Screw cap I5 is of sheet metal in the usual form of caps used to close metal containers contain- 5 ing liquids such vas insecticides. Tightly iitting over cap Iii` is a knurled member I1. Member` l'i and cap I6 together constitute a thumb nut for fastening the liquid container I8 into position to serve as the stock of the pistol.- Casing l0 halves Sand 1 are provided with openings I9 through which the knurled sides of member I1 project adaptingthem to be gripped by the'flngers for screwing cap I6 upon the usual screw neck 20 provided on liquid containers. Axial 15 motion of tube I2 and the thumb nut comprising member- I1 and cap I6'is prevented by fixed channels 42, Fig. 1, provided in thev interior yof the casing. v

Casing halvessv and 1. are so formed below 20 lmember I'I that a. socket 2|, in the form of an inverted elliptical cup is provided for receiving the upper portion of `a container I3, said containers being usually of an elliptical cross-sectiOIl. I 25 A trigger 23 is pivotally mounted in the casing by means of a rivet pin 24 extending between casing halves 6 and 1r The upperrportion of trigger 23 is forked into two branches, one branch engaging at a slot 25 therein, a pin 26' 30 projecting from one side of cylinder 9, and the other branch engaging at a slot 21, a pin 4| projecting from the opposite side of cylinder 9. A trigger guard 29 protects the lower end of trigger 23. 1

The lower end of tube |'2 yis inclined toward the forward end of the pistol, so that when the latter is pointed downward, the last portion of liquid Fig. 3 is a. cross section taken along the broken in container I8 can be removed. A ball valve 30 is provided at the bottom o'f tube I2, said Valve 40 only allowing liquid to be sucked into' the tube but not discharged therefrom at the bottom. l

A nozzle 2| is provided at the forward end or muzzle of thepistol. Said nozzle is substantially .a hollow cylinder, threaded on its interior for 45 receiving a plug 32. A conical-valve needle 33 projects rearwardly from yplug 32 into the mouth of tube 34. ,The forward end of nozzle 3| is fixed to the front of casing halves 6 and 1. A -sleeve 35 is threaded into the rear of nozzle 3| and 50 provides the forward support of tube 34. `A port 36 is provided in the front end of nozzle 3|. Inclined ports 31 are provided through plug 32. The rear of tube 34 has ixed to it a piston 38 slidably mounted in cylinder Q Cylinder head 39 closes of! the front oi.' cylinder 9 and is slidably mounted on tube Il. A coil spring I0 is mounted on tube Il and extends from the muzzle oi' the pistol to cylinder head 39, normally holding cylinder 9 in its rearward position.

When trigger 2l is pulled 4against the pressure oi spring 40, cylinder 9 isl moved toward the muzzle of the pistol, piston Il remaining stationary. 'Ihis causes any liquid'in cylinder l to be forced through tube Ill past valve needle Il, through ports 31 in plug 32 and out through port 36 in the front end of nozzle 3|. In passing valve needle 33 and throughsaidports. the liquid is vaporized. The -pressure'created in cylinder s when the trigger is pulled cannot force the liquid in said cylinder back into container I8, because ball valve does not permit of an outward ow of liquid from tube I2. r

When trigger 23 is released, the pressure is very much reduced in cylinder 9 as it returns to itsnormal position toward the heel of the pistol. Because of the smallness oi' ports 3G and 31, and the space around valve needle 3l, there is very little leakage of air taking place through the nozzle into cylinders when' the latter movesV back under the pressure of spring IIJ. The reduced pressure in cylinder 9 causes the liquid in container I8 to rise in tube `IZ- passing through flexible tubing Il and tube I0 into cylinder 9. There is sufficient leakage oi',air past cap I8. to maintain the pressure of the air above the liquid in container `I8 substantially at atmospheric pressure.

When container I8 is emptied, it is readily removed by turning member 'I'I and cap I6 which are loosely mounted for rotation on tube I2. A new container can then be inserted into socket 2l and cap I6 screwed on until the shoulder of the container is brought to a tight bearing in socket This provides a rm stock for the pistol.

We claim:-

1. In a liquid pistol, the combination of a casing, a discharge nozzle at the forward end of said casing, a chamber in said casing liquid-connected to said nozzle, a piston in said chamber, said chamber and piston being mounted in said casing for relative motionwith respect to each other, a trigger pivot-ally mounted on the casing for effecting said relative motion, said casing having a socket open at the bottom formed therein behind the trigger, a screw cap rotatably mounted in said casing above the socket', a container, having a screw neck, removably fastened in said socket by the engagement of the cap and neck,

1 and means affording liquid communication between the chamber and the liquid in the container, said means passing through the cap.

2. A liquid pistol comprising a casing Vin the form of a pistol except for the omission of the stock, a trigger pivotally mounted upon said casing, said casing being formed with a socket in its lower portion behind the. trigger, said socket being open at the bottom, mechanism carried by said casing, actuated by the trigger for discharging liquid from the muzzle of the pistol, a screw cap member rotatably mounted in s aid casingv above the socket, said member-extending beyond the casing adapting it tobe` gripped by the fingers for manual rotation. a container for holding liquid having a screwn'eck," said containerxbeing re.

movably fastened -in said socket by screwing the cap memberon said vneck,1and me'ans affording liquid communica-tion between the muzzle and the liquid in the container, saidmeans passing through the cap member.

3. A liquid pistol comprising a casing in the form of a pistol except for the omission of the stock, a trigger, mechanism carried by said casing. actuated by the trigger for discharging liquid from the muzzle of the pistol, screw means rotatably mounted upon the casing behind the the container and the muzzle.

4. A liquid pistol comprising a casing in the form of a pistol except for the omission of the stock, a trigger and discharge mechanism supported by said casing, said mechanism being actuated by the trigger for discharging liquid fromA the muzzle of the pistol, the bottom oi the casing behind the trigger being formed to engage the upper portion of a container in which the liquid to be discharged is sold, said container having a screw discharge spout projecting upward vfrom its top substantially less in cross sectional area than the cross sectional area ofthe container at its top, said engagement preventing rotation of the container with respectto the ca'sing,-rotatably`mounted screw means for threaded engagement with said screw spout, said screw means when screwed into engagement with the spout drawing the top of the container tight up against the casing, and means passing through the screw means for aii'ording liquid communication between liquid in the container and the muzzle.

5. A liquid pistol comprising a casing in the form of a pistol -except for the omission of the stock, a trigger and discharge mechanism supported by said casing, said mechanism being actuated by the trigger for discharging liquid from the muzzle of the pistol, means upon the casing behind the trigger adapted to engage the upper portion of a container in which the liquid to be discharged is sold, said container having a screw neck projecting up from its top, a screw cap adapted to be screwed upon said neck, said cap being rotatably mounted upon said pistol, said means and the screw cap being adapted to hold said container upon the casing in position to act as the stock of the pistol, and a tube in liquid communication with the discharge mechanism passing through said screw cap and vextending substantial distance below.

6. A liquid pistol comprising a casing in the form of apistol except furthe-omission of the stock, a trigger and discharge mechanism within said casing', `said mechanism being actuated by `the trigger for discharging liquid from the muzzle of the pistol, a screw cap adapted to be screwed upon the screw neck of a container in which the liquid to be discharged is sold for holding the container in position to act as stock of the pistol, and a tube in liquid communication with the discharge mechanism passing through said screw cap and extending a substantial distance below,

said cap being rotatably mounted on said tube in tation of the container with respect to the casing and providing substantial leverage between the container and the casing.

8. A liquid pistol comprising a casing in the form of a pistol except for the omission of the stock, a discharge nozzle at the forward end of the barrel portion of the casing, a chamber, liquid connectedto said nozzle and slidably mounted in said barrel portion, a piston in said chamber xed relatively to said casing, a trigger for sliding said chamber over the piston for effecting the discharge of liquid from said nozzle, means for fastening a container in which the liquid is sold upon the casing in such position to act as stock of the pistol, a tube passing through said means for insertion into the container, and a exible tube connecting the chamber with the tube passing through said means.

9. A liquid pistol comprising a casing in the form of a pistol except for the omission of the stock, a discharge nozzle at the forward end of the barrel portion of the casing, a chamber slidably mountedin said barrel portion, a piston in 10. A liquid pistol comprising a casing Isubstantially in the form of a pistol except for the omission of the stock, a trigger, mechanism actuated by the trigger for discharging liquid from the muzzle of the pistol, means rotatably mounted upon the casing for removably engaging the usual discharge spout extending upward from a container in which the liquid to be discharged is. sold, means upon the casing for engaging the upper portion of the container beyond its spout, both ofV said means holding the container upon the casing with suiiicient leverage to act as the stock of the pistol, and means passing through the means for engaging the spout, for affording liquid communication between liquid in the container and said muzzle.

11. A liquid pistol comprising a casing substantially in the form of a pistol except for the omission of the stock, a trigger, mechanism actuated by the trigger for discharging liquid from the muzzle of the pistol, said casing having a socket lopenl at the bottom behind the trigger, screw means rotatably mounted upon the casing behind the trigger for engaging the screw spout of a container in which the liquid to. be discharged is sold, said screw means when screwed uponsaid spout holding the upper part of said container up in said socket, and means passing NATHAN GEORGE HORWITI. NORMAN DINE.

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