US1524283A - Air brush - Google Patents

Description

1524,28@ W. C" BEACH AIR BRUSH Firled April 28, 1926 2 Shet5 sheet .2

INVENTOR ATTORIVEY Patented Jan. 27, 1925.y

WILLARD C. BEACH, OF NEWARK, NEW JERSE'S'.-

' AIR BRUSH.

Application filed April 28, 1923. Serial No. 635,286.

T all whom t may concern.'

Be it known that I, WILLARD C. BEAeH, a citizen ofthe United States ofl America,

residing at Newark, in the county of Essex' and State of New Jersey, have invented new and useful Improvements in Air Brushes, ofwhich thel following is a specification. p I

This invention relates to improvements in air brushes as used in applying paint and' the like in the form of a spray and has as one object to provide a device having a Single control means for air and liquid, the same being arranged in convenient position for operation.

Another purpose is to produce an 'air brush exceptionally easy to handle and having unusually few parts, simple in construction and not readi y liable to fail in operation.

A further aim is in the provision oi' means for adjusting the air in accordance with requirements during operation of the brush and also means for avoiding back pressure 'or clogging the operative parts by the liquid. i

These and analogous aims, objects and purposes, which will become apparent as the description progresses, are accomplished by the novel construction, arrangement and combination of parts hereafter described and shown in the annexed drawings, forining an essential part of this disclosure, and in whichz@ Figure 1 is a side view, mainly in section of assembled parts constituting the invention.

Figure 2 is a top plan view of the same, partsbeing broken away to show the arrangement of parts.

Figure 3 is a front elevational view of the same.

Figure 4 is an enlarged transverse sectional View taken on line lf-1 of Figure 1.

Figure 5 is a partial rear View of the device.

Figure is an enlarged transverse sectional view through the handle, taken on line 6-6 of Figure l.

Figure 7 is a side view of the liquid inlet control valve plug and its adjusting means.

Figure 8 is a sid-e view of the air control valve plunger in detail.

F igure 9 is a similar view of the air control lvalve plug.

Figure 10 is a perspective view showing the trigger andu associated parts.

As shown in the drawings, the apparatus somewhat resembles in general appearance a pocket or holster carried gun and consists of a body or barrel formed integrally with a handle or hilt 16 extending nearly at a right angle from a point "to one side of the center of length of the body.

Said handle is hollow in construction, consisting of walls 17 and 18 integrally vjoined at one side and open at the .other, the marginal edges of which present stepped or shouldered surfaces 19 to receive an inset cover plate 20, forming with the mentioned elements a smooth and comfortable feeling handle.

l Extending inward from this element 18 is' a relatively narrow solid central rib portion 21 having two projecting spaced lugs 22, into whichare threaded the screws 23, counterbored into the plate and holding it rigidly in position.

Projecting integrallyT downward from the rib 21, beyond the handle, is ya nozzle '24,. B0 screw-threaded exteriorly to receive a coupling (not shown) used to connect an air hose, and also having an internal thread 25 in which is fitted a tubular adjusting screw 26. g5

The rib contains a bore 27 in register with the opening nozzle 24 and in whichis a helical compression spring 28, abutting respectively the adjusting screw 26 and the base 29 of a valve plug.

This plug has an. extension 30 entering the spring and a conical contact element 31 suited to engage the valve seat 32 formed at the inner end of the bore 27.

A reduced neck 33, above the conical por- 95 tion of the valve plug, leads to a triangular stem 34, the rounded longitudinal edges of which are itted to slide freely in av bore 35 l formed in axial register with the bore 27 but of lesser diameter.

In the upper end of the bore is av slidable plunger 36 having a reduced lower endI 37 normally in contact with the stein 34 of* the conical air valve.

Extending from the front ot' the' handle is a rigid guard' 38, relatively narrow and adapted to project between the fingers of an operator so that two of the ingers may malte contactwith the wall 18 when grasping the implement and the remaining iingers actuate the trigger 40 as further described, and in order to further lighten the weight of the structure a chamber 39 is interposed between the rib 21 and wall 18, in thel-ower half lot' the handle. Said trigger 40 is generally outwardly curved and formedwith an arm 41 on its rearsurface, the same extending into a recess' 42 in the upper end of the handle and is bifurcated to receive one'end of a link 44, held by the pin 45, the llink extending into the handle, towards the back 17, and is connected by a pin 46 between the forks 47 of an angularly bent lever 48 pivoted at 49 to extend through an opening 50 into the barrel 15 terminating in a fork 51'.

Intersecting the opening at the end of the valve seat 32 is a transversely drilled passage 52, sealed by a plug 53, set flush in the wall l18, and intersecting the passage 54, parallel with the wall 18 and directed angular-ly outward through a 'lateral extension 55 of the barrel 15, its outer end being sealed by a plug 56. j i l Said extension is disposed lengthwise along one side of the barrel and contains apassage 57, .intersecting the passage 54, and sealed at its front end by a plug 58, an angularly drilled opening 59 connecting the pas sage 57 with the counterbored air equalizing chamber 60 in the frontendof the-barrel.

Inthis chamber is secured the spra r,head 61, the same being substantially cylinidical, having a central annular recess 62\`\ `.and formed at its rear with a threaded shank 63 -fitting the screw threads 640i the body 0rl bar'iel 15.

Thel outer portion of the spray head is formed into a cone 65 having a reduced cylindrical end 66 containing a relatively small Aaxial opening 67 leading to the main central bore or iuid equalizing chamber 68, there being a conical valve seat 69 at its junction with the opening 67.

Threaded on the outer end of the barrel 15 is a cap 70, lmurled to permit movement by the handand having a conical part 71 bored to' present a definite annular space 72 between it and the cone 65, and in register with the opening 67 is a hole 73 formed through the endy of the cap. Y

It its to be noted that theinternal threads 64 are extended nearly to the junction of the handle 16 and at the end of the threads is a hollow screw 74, through the bore` of which tom of the recess.

A raised lug 90 on the upper surface of the barrel has fastened upon it a fiat spring 91 by screws 92, the outer, free end of the spring being shaped to present a detent 93, engageabl'e in the corrugations of the head 87, thus holding the sleeve 86 in any adjusted position but permitting it to be turned by the appication of force, the end 94 of the spring being up-turned for convenience in raising the detent.

By screwing the sleeve 86 inwardly it will be apparent that the distance which the valve and its rod can be moved may be limited or all motion prevented, as may be desirable in transporting the device.

In operation, a flexible tube or hose lead- 'I ing from the source of liquid'supply is consuch manner that two of the fingers rest upon the trigger 40 and the other two below the stop 38 on the surface 18, in which condition the'a'ppliance'is ready to operate.

Upon applying pressure to the trigger, the link 44 will be depressed, forcing the Valve 32from its seat 1n oppositionjto the closing spring 28, the entering air from the hose passing through the hollow screw 26, opening 27, past the valve 32, into the bore 52, thence the bore 54, through the passages 57 and 59 into the chamber 60, past the fiattened parts 61 of the spray head 60 into the space 72 and eventual y out of the opening 73.

As the link 44 in its movement. actuates the leverv 48, its fork 51 resses the nut 84 outwardly, compressing he spring 85 and through its connections retractI the valve plug from its seat 69, allowing the liquid entering through the nozzle 79 to ass out of the bone 67 and comminglc with t io air from the annular vspace 72, dispensing the same Although-l have described my impro-vements with considerable detail and with respect to certa-in particular forms of my invention, l do not desire` to be limited to such details, since many changes and modifications may well be made without departing from the spirit and scope of my 4invention in its broadest aspect.

Having thus described my invention, what l claim as new and desire to secure by Letters Patent, is:

l. An air brush comprising a barrel having an axial bore and an air duct parallel thereto, a conical `spray head itixed in said bore, a cap removably engaged over said head, there being an annular space therebetween communicating with the air duct, a liquid inlet to the bore adjacent the bottom of said head, a valve contnolling the passage in said head sui-ted to engage ,a hose, a. single, horizontally disposed plunger rod combined with said valve, guides adjustably spaced in the bore of said barrel, a packing for said rod disposed between `said Iguides all of said elementsbeing iii-closed in the'harrel, means for directing compressed yair into the duct, and a single 'means for simultaneously controlling the entrance of air and' operation of said valve.

2. An air brush .comprising atubular barrel having an :axial bore and an air duct parallel thereto, a rconical spray head'tiXed in said bore, a cap removably engaged over said head, there being an annular space therebetween communicating with the air duct, a liquid inlet to the bore adjacent said head, a valve controlling the passage in said, head suited to engage a hose, a single, hori-A zontally disposed plunger rodl `combined with said valve, adjustable guides through which said rod operates, a head adjustably engaged on said rod, a sleeve adjustable in `said barrel containing saidl head, said sleeve limiting the action of the valve plunger rod, a spring in said sleeve urging the valve into closing position, said spring and sleeve being enclosed, and means for retracting the valve, said retracting means also operating to admit air to the duct.

3. An air brush' comprising a tubular body having .an integral angularly extending handle, the bore of said body being i'iternally .screw-threaded at each end, the outer end being counterbored beyond the threads, an annularly recessed spray head held in the counterbore, means for conducting air to the recess of said head, a cap engaging .said body spa-ced exteriorly said head, an inlet nozzle communicating with the core, .a value controlling lthe passage through said head, vsaid valve having an elongated stem constituting a single, horizontally :disposed loperating plunger, guides tor said stem engaging the internal thread -ot said body, a packing surrounding said stem compressed by said guides, a collar adjustable on said stem, a spring pressing said collar to close said valve all within saidfbarrel, a lever pivot'ed in said handle op-v posed to said spring, and a trigger for actuating said lever, said trigger controlling the air inlet to said head.

el. An air brush comprising a tubular body having an integral angularly extending handle, the bore of said body befng internally screw-threaded at each end, the outer end being counterbored beyond the threads, an annularly recessed spray head held in thecounterbore, means for conducting air to the recess of said head, a cap engaging said body spaced exteriorly said head, an inlet nozzle communicating with the bore, a valve controlling 4the passage through .said head, said valve having an elongated stem const'tuting a single, hori- Izontally disposed operating plunger, guides for said stem, a sleeve engaging the threads at the oppositeend of said body, said sleeve having an enlarged corrugated head, aheaded element in said sleeve, saideleinent, .adjust-ably engaging said stem, a lock nutlon said stem abutting said element, a. compression spring vin said :sleeve abutting the lock nut, means for holding said sleeve inV adjustment, and means for compressing said spring and retracting said rod. z

5. Anl air brush comprising' a tubular body having an integral angula-rly extending handle, a paint inlet suited to receive a hose; a spray head, a valve controlling the passage in said head, means for adjusting the operative lengthv of said valve, means for adjusting the movement that can be imparted to said valve, a spring detent engaging the last named adjusting means, a. forked lever engaging said valve, al link extending outward from said handle, a forked lever connectedjtofsaid link, a trigger pivotally engaging said link, and a single, horizontallyldisposed means operated by said link and forked lever for admitting air andv paint to said spray head. ,f

6. -An air brush comprising a barrel h/aving an axial bore and an air duct parallel thereto, a conical spray head fixed in/ said bore, a cap. removably enga-ged ovei1 said head, there being an annular space therebetween communicating with the air duct, a paint inlet to the bore adjacent said-head, a valve controlling the passage in said head 4suited to engage a hose, a suitable, horizontally disposed means for adjusting the movement of said valve, ahandle integra-l with said barreh an air inlet combined therewith, a forked lever pivoted in said handle engaging said valve, a trigger pivoted on said handle, a link connecting said lever and trigger, a spring actuated valve in said handle controlling passages between said air inlet and the air duet,y and means operative beice tween said air valve and said link for opposv ing the spring to admit air upon actuation of saidy trigger;

7. An air brush comprising a tubular body having an integral angularly extending handle, inlet nozzles .for paint and air combined respectively With the body and handle7 a spray head having a lnixing cha-mber for the paint and air, a. valve controllng the discharge passage of the paint, a yValve regulating the inlet of air, a single, horizontally disposed plunger for 4controlling yboth Valves, independent springs arranged axially of each valve, adustable means controlling the opening of the paint valve, a trigger pivoted in said handle near i-t-s junction with the barrel7 and means actuated by sia-id trigger and engaging said plunger for opening both -of said'valves sinn taneously.

' 8. An air brush comprising a tubular body having an integral Aangularly extend' ing handle, a spray head having a mixing chamber for the paint and air, and further provided with a main central bore or fluid equalizing chamber, and an air equalizing chamber surrounding said spray head, an air' passage located in the said integral angularly extendin handle and communicating with the sai air equalizng chamber, a liquid 'supply passage communicating with the said tubular body in close proximity tn .the main central bore or fiuid e ualizing VILLARD C. BEACH; Witnesses:

FREDK C. FISCHER. F. NoLL.

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