US2942791A

US2942791A - Spotting gun

Info

Publication number: US2942791A
Application number: US799623A
Authority: US
Inventors: Elmer W Bush; Jayne N Brock
Original assignee: Individual
Current assignee: Individual
Priority date: 1959-03-16
Filing date: 1959-03-16
Publication date: 1960-06-28
Anticipated expiration: 1977-06-28

Description

June 28, 1960 E. w. BUSH ETAL SPOTTING GUN Filed March 16, 1959 E B a.

w M 3 4 4 6 7 .I. 5 7 7 6 m r INVENTORS' ELMER W BUSH .MYNE N. BROCK United States Patent 1 1,942,191 SPO'ITING GUN Elmer w. Bush and Jayne N. Brock, both at Y 6915 Landis Avel, Carmichael, Calif.-

fluids, of the kind found in cleaning and dyeing plants,

to clothes and fabrics.

It is an object of the invention to provide a spotting gun which enables a spotter in a cleaning and dyeing establishment to apply conveniently either steam orair, or a combination of either steam or air and a spotting fluid, to clothes, fabrics, rugs, carpets, etc.

It is another object of the invention to provide a readily manipulatedspotting fluid applicatonwhich re'quiresthe use of but one hand to hold and operate the device.

It is still another object'o'f the invention to provide a spotting gun which not only breaks the spotting fluid into a fine spray but which also directs the spray in an accurate fashion.

It is yet another object of the invention to provide a generally improved spotting gun.

Other objects, together with the foregoing, are attained in the embodiment described in the following description and shown in the accompanying drawing in which the figure is a view partially in elevation and partially in section of a spotting gun of the invention.

While the device is susceptible of numerous physical embodiments, depending on the environment and requirements of use, substantial numbers of the herein shown and described embodiment have been made, sold and used and have performed in an outstandingly successful manner.

All cleaning and dyeing plants of any size are provided with a source of both pressurized air and steam, air and steam being used by the spotter in conjunction with spotting fluids of various kinds to effect spot removal. These fluids are preferably of the kinds described in our copending applications Serial No. 652,370, filed April 12, 1957, and Serial No. 669,922, filed July 5, 1957, now abandoned, although the use of our spotting gun is not limited thereto.

In the figure, the spotting gun, generally designated by the numeral 6, includes a pressure line 7 connected to a flexible hose 8 leading downwardly to a conventional, widely-used apparatus (not shown) which permits the operator, or spotter, by foot pressure on an air pedal or steam pedal, to discharge at will either air or steam through the pressure line 7.

The portion 9 of the pressure line 7 adjacent the hose 8 is substantially linear; but adjacent the upper, free or distal end of the pressure line the line is provided with a curved or arcuate portion 11 terminating in an open end 12. An interior counterbore 13 is a small but highly important feature since it eliminates the formation of drops and thus obviates any dripping or blowing of fluid in drop form onto the fabric being treated. A beveled shoulder 14, forming a part of the counterbore, has been formed to be of especial value in eliminating the formation of drops.

An annular constriction 16 is formed in the pressure line adjacent the open end 12 to form a throat 17. The flow of gas, whether it be air or steam, produces in conjunction with the constriction, by well-known principles, a reduced pressure adjacent the mouth 21 of a conduit 22 through which is conducted the spotting fluid.

The spotting fluid is contained, until used, in a suitable reservoir (not shown), such as gallon jug or can,

'ice

and flows through a flexible hose 26 into a fluid line 27. The fluid line- 27 is substantially linear, as at 28, for a portion of its length and is; in spaced and parallel relation with respect to the portion 9 of the pressure line 7, the lines being held in this condition by an upper disk 31 and a lower disk 32. a j Each of the disks is provided with suitable apertures 33 and 34fthrough which. the lines extend and at least the pressure line is secured to the disks by suitable fastening washers'36. I

Preferably, each of the disks is also perforated by other openings, not shown, to permit" cooling air to pass by convectiont-hrough the hollow interior 38 of a handle 39 capped at its opposite ends by the disks 31 and 32, thereby helping to keep the handle cool.

The upper arcuate portion 11 of the pressure line 7 and an upper arcuate portion 41 of the. fluid line 27 are secured to the body 42 or barrel of the gun 6.

The body 42 is generally cylindrical as at 43 although it assumes adjacent its forward end a tapering or conical configuration as at 44. The longitudinal axis of the cylinder and the cone is substantially coincident with the axis of the counterbore 13 of the pressure line 7 so as to provide the operator with a familiar gun-sight type of aim, enabling the operator accurately to direct the spray emerging from the open end 12.

The cylindrical portion 43 of the body is provided with a cylindrical bore 46 ending at its forward end in a flatly tapering wall 47 serving as a valve seat against which a forward O-ring 48 is urged.

Adjacent the forward end of the valve seat 47 there is furnished a chamber 51 connected by a channel 5-2 to the exterior conduit 22.

The forward O-ring 48 is mounted on the nose 54 of a valve stem 56 translatably mounted in a plug closure 57 threadably secured in the after end of the hollow cylindrical portion 43. Urging the forward O-ring 48 against the valve seat 47 is an annular flange 61 aflixed to the valve stem 56 adjacent the nose 54.

The flange 61, in turn, is urged forwardly by a helical spring 62 hearing at its after end against a washer 63 encompassing the stem. The washer 63 serves, in turn, to urge an after :O-ring 64 against a tapered wall 66 in the plug 57, the O-ring 64' permitting translation of the valve stem but preventing the escape of fluid located inside the bore 46.

Opening of the valve is effected by movement of the stem 56 in the direction indicated by the arrow 71. A lever 72 is provided adjacent its upper portion 73 with an aperture 74. The walls of the aperture 74 loosely encompass the after end of the valve stem 56 extending rearwardly from the after face 76 of the plug 57 so as to give some freedom of motion. An acorn nut 77 threaded on the end of the stem rather loosely confines the upper portion 73 of the lever. Thus, when the lower end 81 of the lever is urged in the forward direction of the lower arrow 82, pivoting occurs about the fulcrum provided by the wall 83 of the opening 84 in the extension arm 85 and the valve stem is urged rearwardly. The arm 85 depends from a ring 86 clamped by the plug shoulder 80. For comfort, a sleeve 87 is mounted on the lower end of the lever 72 and provides a convenient surface against which the operators thumb can be pressed while holding the handle 39 in the palm and fingers.

As can be seen by reference to the members shown in outline, which correspond to the valve in open position, communication exists in open-valve position between the cylindrical bore 46 and the chamber 51. The bore in turn is in communication through the orifice 91 with the fluid line 27.

Consequently, when air or steam under pressureis fed into the pressure line 7 by reason of the operatorsstepping on the air or steam pedal, a pressure less than atmospheric is produced adjacent the mouth 21 of the conduit 22. This situation causes the spotting fluid to flow upwardly throughthe fluid line into the bore 46, past the valve seat and into the chamber 51, from which location it flows through the conduit22 and into the; stream o f air or steam in-the pressure line. As the fluid emerges from the conduit mouth, the fiuidis blasted by the swiftly mov- V f'ing gas and is turned into a fine mist or spray which is the spot. a

It can therefore be seen that we have provided a spot- 1 ting gun'whichis not only convenient to manipulate but which is also highly flexible in operation.

What is claimed is: a A s'pottinggun comprising a pressure line extending from a source of pressurized gas, said pressure line being 4 7 linear for a portion of its length and arcuate throughout its distal end portion, said pressure line having an annular construction therein adjacent said distal end, a fluid line extending from a source of spotting fluid, said fluid line having a linear portion, and an arcuate portion said linear portion being in parallel relation to said linear portion of said pressure line, said fluid line connecting with said pressure line adjacent said constriction, a handle encompassing said'linear portions of said lines adjacent said arcuate portions of said lines, and a valve interposed V in said fluid line and mounted onsaid arcuatedistal end portion of said pressure line, said valve including a body portion securedto said pressure line and a lever extending in spaced-parallel relation to said handle.

I References Cited in theifile of this patent- UNITED STATES-PATENTS (487,623 Lockhart Dec'. 6, 1892 1,427,495 Norris Aug. 29, 1922.- 1,504,851 Wren Aug. 12, 1924 1,563,123 Wade Nov. 24, 1925 1,665,224 Shields Apr. 10, 1928 2,619,821 Fink ;j Dec. 2,1952