Apparatus for pneumatic painting
US 593013 A
Description (OCR text may contain errors)
a sheets-sheet 1.
Patented Nov. 2, 1897.
A. FISHER. APPARATUS POR PNEUMATIC PAINTING.
(No ModeL) 3 Sheets-Sheet 2. A. FISHER.
APPARATUS POR PNBUMATIC PAINTING. No. 593,013. Patented Nov., 2, 1897.
Inventor L a VCJ.
(No Model.) 3 Sheets-Sheet 8. A FISHER APPARATUS IOR PNEUIVIAIIG PAINTING.
No. 593,013. Patented NOV. 2, 1897.
Witnesses. 2. E:
s mens co, mmolmso.. wmmmow. n. c.
UNITED STATES PATENT @Erica ABEL FISHER, OF WELLSVILLE, OHIO.
APPARATUS" FOR PNEUMATIC PAlNTiNG.
SPECIFICATION forming part of Letters Patent No. 593,013, dated November 2, 1897.
Application filed September 2, 1896. Serial No. 604,624. (No model.)
To all whom t may concern:
Be it known that I, ABEL FISHER, a citizen of the United States, residing in IVellsville, in the county of Columbiana, in the State of Ohio, have invented a certain new and useful Improvement in Apparatus for Pneumatic Painting, of which the following is a true and exact description, the accompanying drawings being had reference to, said drawings forming a part of the speoication.
My invention relates to what may be called a pneu matic painting apparatus,7 consisting of mechanism designed to facilitate the application of paint "to objects to be painted by throwing it upon them in the form ot a iine spray.
section taken on the line 3 3 of Fig. 1.
The object of my invention is to generally improve the construction of apparatus of this kind; and it consists in improvements in the construction of the spraying nozzle or nozzles; also,in improvements in the mechanism which controls the delivery of fluid paint and air to the nozzle; also, in improvements in what may be called the spraying-head, designed to facilitate its manipulation by the hands of the operator; also, .in improvements in the sources of supply of paint and compressed air and in various details of construction.
The nature of my improvements will be best understood as described in connection with the drawings, in which they are illustrated, and in which- Figure l. is a side elevation of the sprayinghead, taken on the vertical sections l l of Fig. 4. Fig. l is a view of the lower part of the pistol-grip handle. Fig. 2 is an end view of the nozzle; Fig. 8, a sectional view of the nozzle, taken on the section-line Il et of Fig. 1. Fig. 4 is a plan view of the spraying-head; Fig. 5, a horizontal section taken on the section-line 2 2 of Fig. 1; Fig. 6, a horizontal Fig. 7 is a front view of the inner or paint nozzle, showing the construction of its outer walls, which form the inner walls of the air-nozzle. Fig. 8 is a plan view of this nozzle. Fig. 9 is a view taken on section-line 5 5 of Fig. 8, and Fig. l() is an elevation showing the reservoirtank combined in operative condition with the spraying-nozzle.
A A is the air-nozzle of the spraying device.
It is formed with converging walls A A',Which project, as shown, some distance beyond the end of the paint-nozzle, (indicated at F.) The nozzle A is secured to the tube B in such wise that it can turn upon the tube B for at least an angle of ninety degrees and without loosening the joint between the nozzle and the tube. This may be accomplished in various ways. As shown, I forni. at the rear of the nozzle A an annular shoulder A2, over which lits the flange of threaded tube C, screwing onto the tube B at B', and between the end A3 of the nozzle A and the end of the tube B, I place an elastic washer or gasket D, which will insure a tight joint through a considerable range of movement of the threaded tube or sleeve C.
To supplement the bearing of the end A3 of the nozzle upon the washer D, l prefer to employ a metallic washer E, to which is soldered or otherwise fastened a sleeve Evhich passes into the bore of the tube B and forms a Wall to prevent the displacement of the elastic washer D.
B3 indicates an annular shoulder at the rear end of the open part of the tube B; B4, a threaded perforation; B5 B5, a tubular extension terminating in a valve-seat BC', preferably formed by cutting off the tubular eXtension B5 at an angle which, as shown, is fortyiive degrees.
F indicates the paint-spraying nozzle,which is firmly secured to a tube G, said tube G hav- Ving a threaded end G', which screws into the threaded hole Bi, and having also an annular flange G2, and preferably an annular slot G3 in the rear of said iiange. In securing the tube G to the tube B, I prefer to place an elastic washer D against the annular shoulder B3, and then upon the outside of the elastic washer I place a metallic washer E2, against which the flange G2 rests when the tube G is screwed down into B4. The function of the elastic washer D' is to keep a tight joint,while permitting, as in the case of the elastic washer D, some freedom of motion to the tube G. On each side of the air-nozzle A, I form parallel grooves A4, in which iit the lateral edges F4 of the nozzle F. The side walls of the nozzle F, like the walls A' of the nozzle A, are of converging shape, and they form the inner walls, so to speak, for the two flat air-jets which issue on each side of the long and narrow paint-jet coming from the nozzleF;
The form of the jets and the convergence of the air-jets above and below the paint-jet, as well as the prolongation of the walls A beyond the end of the nozzleF, form in part the subject-matter of my pending application for Letters Patent, filed January 7, 1896, Serial No. 574,579. Ihave, however, improved upon the construction of my said former applica.- tion by providing a series of diverging or fanlike ribs or fingers F, which are preferably shown, and tit against the Walls A of the nozzle A. These diverging flanges insure the propel? spreading out of the air-jets comingA from thev nozzle A and have been: found an important improvement upon my former construction. To prevent, however, the issuance.
of the airfj etsin separate streams rather than steady sheets, I form at the outer extremity of the ribsV F.' grooves F2, from the outer edges of which the nozzle terminates inplane tongues, asindicated at F3. Thefunctionof the groovesis to serve as a reservoir or equal-l izing chamber for the air, andtheir presence insures.y the issuance of they airfjets in fiat uniformI sheets or bands.
It will be noticed that when the nozzles A and F are. in operative position they are securely locked together, and whenitis desired, for instance, that the jet should bevertical instead of. horizontal, as shown, it is only necessaryto turn the nozzle A, the motion of which will also Vturn the nozzle F, theelastic washers I) and. D permitting this angular adjustment without liability to leal; at the joint. It will be' understood that the oil enters.
the nozzle F throught-he end B of the,'tube B?, from. which it passes through tube Gto. the nozzle on the other end. The air enters the` tube Bthrough avalve-port B8, passing di.-
reetly to the nozzle A. The port, B8 connectsy thetubeBwitha passage B9, which may bev conveniently formed in one casting with tube B, as shown, an opening, as indicated at B8, being leftfor the insertion of the valve.
indicatesla metallic ring to which is securedthe upper end of the Wall J `of thepaintaresecuredto a plate I, andthe topof the reservoir-chamber is preferably formed of a flexible diaphragm, (indicated at, K,)L indicatingfa metallic cover secured above ,the da# phraginV K and preferably formedv into,tw,oA
domes, aslindicated at L and L2, L3 being an opening infthe covering and L 4 and L5 tubu-` larextensionsfromthe top ofthe two domes L and. L?
` M indicates apaint-supply nozzle entering the' reservoir-chamber, which I have marked J and preferably c ut oifl obliquely, asindi-c catedvat M', to forma valve-seat, y
M2 is a flexible paint-supply pipe. secured to kthe tube M by a clamping devicefsuch, for instance, as M3.
`The lower edges of the wall J reservoir by. means of the tubular extension B5, which passes through the walls, an elastic d washer l)2 being placed between the butt-end l (indicated at B7) of tube B and the wall J,
while on the inside of the wall J, I place a washer N, which is pressed against the wall 'nl by the action of a nut N. cast upon the out-erY walls of the nozzlelF, as q O-vand o are valve-stems supporting at their lower ends inclined valve-holding devices, as .indicated at O and o'. Flanges O2 ando2 on ithe valve-stems rest against the. inside of the diaphragm K, whilenn'ts O3 and 03, screwing jupon thevalve-stems, clamp the diaphragm againstthe flanges YOzand, o2. The upper ends of the,valve,stems pass into the perforations in springfadjusting. screws O4 and 04. l'lhese screws engage with internall screwthreads in the sleevesLtand, L5 andr adjust the tension of springs O5 and 05, which rest, respectively, against 'the nuts O3 and o3.
O6 and o6 arevalve-holdin g plates by means of which thetwoobliquely-set valves O7 and 207 are secured to the valve-spindles and held iin position toclose the oblique tube-openin gs B( and M'. By this arrangement and con .struction of the valves and openings closed thereby I am enabledto use the vertical spindles to advantage, and I will here state that both valves O7 and. o7 are arranged so. as to normally close the openings; to Which they pertain. Thusin theconstruction shown the springs O? and o8, hereV formed on a single 'spring-plate, press againstthe lower ends of the valve-supporting device andv press the valves into position against the openings B6 andMC ll/IanipulationofA the. screws 0.4 and oL1 regulates thefamount of. pressure by which the valve is heldv seated, and obviously the construction describedwith. reference to the valve vo7, controlling the inflow of paint to the reservoir J', makes thisyalvel in effecta pressure-reducing valve. Thisvis important, as thepaint flows throughthe pipe M at considerable pressure, while onlya few pounds pressure is desired inthe reservoir J. The valve O7., controlling the delivery of paint from the chamber J', isoperated bya pivoted lever I), said lever .being pivoted on the .cover L; at P', havin g, preferably,V a spherical; socket P2, adapted torest on the sphericalv topjofY the nut O3, while fromjheouter or .free end of the. leverextend rodsP'f Poneon each side ofI the reservoirand. eachY terminating in` a thumbgrip P4, placed. within easy reach of the thumb of the operator, holding` the paintingdevice in. his hand. I prefer. to use, two
thumb-grips, so that'one of them will be within kreach of`v the` operators thumb. whether he holds the device in his right or. hisleft hand.
Q is the handle, which ispreferably formed, as shown, like the grip or handle of a pistol.
seams s Above the grip proper the handle, which is preferably made in two paris secured together by rivets or screws q, is grooved or slotted, so as to provide a recess to receive the tubular extension B9 of tube B and its extension and also to give passage to the trigger-valve-controllin g device Q4, which is pivoied at Q5 and has an extension QG, which engages the rod R oi a valve Rf, which controls the air-opening BS. The spindle or rod R passes through the stuffing-box, which, as shown, is made up of an annular Washer R2, an elastic gasket or washer D4, and a perforated screw-block R3. The trigger-handle Q4 lies Within reach of the operators fingers 'as he grips the handle Q and should preferably lie in a slot or opening Q3, so that the ngers gripping the handle Q Will normally lie over the trigger Q4. A spring Q7, which may rest upon a plate Q8, screwed to the sides Q' ot' the handle, serves to hold the valve R normally in its closed position.
M2 and S2 are flexible pipes, one serving as a conduit for paint to the reservoir J and the other as a conduit for compressed air, leading through the nipple S and pipe-section S to the pipe extension B9 already described. These exible pipes may of course lead from any convenient reservoiror reservoirs, but preferably I connect them with a movable supply-tank for both paint and air, such a tank being shown at T, Fig. 10, the paintpipe M2 leading into the bottom of the tank, as shown at U10, V3 being a valve controlling the iiow from the tank at this point. The compressed-air pipe`S2, I connect with a pipe U3, which said pipe opens into the bottom of the tank T at U1 and into the top of the tank at U5, having'l also at its upper end an opening at U7, leading to the open air and controlled by a valve V2.
U2 is a pipe connection. leading from the pipe Us and preferably having situated in it a pressure-redu cing valve, as indicated at U, U being a removable pipe by which the pipesection U2 can be at will connected with an air-pump or reservoir of compressed air-as, for instance, as indicated at NV. Valves V and V are situated in the pipe Il3 below the connection of the pipe S2 with said pipe U3 and above the connection of the pipe U2 With said pipe. U8 indicates a pressure-gage secured on an elbouT U6 of the pipe U3.
T indicates the cover of the tank, which is pressed down upon the top thereof conveniently by means of a screw T5, upon which a hand-wheel TG screws. The lower end of the screw T5 is engaged, through its head T4, by a yoke-piece T2, and the hand-Wheel screws down upon a clamping device T3, which rests upon the top T3. Most conveniently the tank T is secured to a WheelbarroW-like vehicle Y, having a front Wheel Y', While iron feet Y2, secured to the bottom of the tank, take the place of the legs of the Wheelbarrow.
In illing the tank the paint is most conveniently introduced from the top, being of course in liquid form. Then to charge the tank with compressed air the valve V is closed and the valve V opened and compressed air is permitted to enter through U2, U3, and U5 until the desired amount is contained in the tank. I prefer to charge the tank at a pressure in the neighborhood of sixty pounds per square inch. The tank charged as above, to gether with the flexible pipes leading from the tank and the handle carrying the spraying device, can be transported readily from place to place, as desired. W'hen in use, the valve V3 is opened, permitting the paint to llow from the pipe M2, While of course the air is permitted to iiow through the pipe S2. The paint, by the reducingvalve already described, flows into the reservoir J until at very much reduced pressure, and is not permitted to exceed this pressure in said reservoir.
From time to time it is necessary to stir the paint in the tank, and this is accomplished by closing the valve V', opening the valve V, and opening the valve V2. Then connecting the pipe U3 with the source of compressed air U the air will dow into the bottom of the tank at U4 and escape from the top of the tank through U5 and U7, effecting, of course,
a complete stirring of the contents ofthe tank.
Having now described my invention, What I claim as new, and desire to secure by Iletters Patent, is
1. A paint-sprayin g device having apistolgrip as Q, valves as O7 and R controlling the flow of paint and impelling iiuid to the sprayin g-nozzle and trigger-valvc-actuatin g devices as Q4 and P4 one lying in reach of the lingers and the other Within reach of the thu mb when the grip Q is held in the hand.
2. A paint-spraying device having a pistolgrip as Q, valves as O7 and R controlling the flow of paint and impelling iiuid to the spraying-nozzle and tri gger-valve-actuating devices for opening said valves, one as Q4 lying in front of grip Q and the others P4 P4 extending on each side of grip Q to position Within easy reach of the `thumb of the operator.
3. A paint-spraying nozzle having supported upon a handle as Q a paint-reservoir J' and a narrow divergin g paint-conduit .as B9 S and having also nozzle jet-forming devices as A and F in combination with valves as R and 07 controlling the flow of air and paint to the nozzle and a pressure-reducing valve as o7 controlling the flow of paint to the reservoir J.
4. In a paint-sprayin g device the combination with a handle and a tube as B secured thereto, of an oil-nozzle as F attached by a screw-union to the rear end of the said tube an elastic gasket D', against which said screwunion rests, an air-nozzle as A secured by screw-union upon the outer end of tube B and an elastic gasket D, against which said last-mentioned union rests, said nozzles F and IOO IIO
A being when inoperative position locked together as described and so that turning nozzle A will also turn nozzle F.
5. In a paint-spraying device a narrow diverging paint-nozzle as F in combination with narrow divergin g nozzles formed on each side thereof, a series of divergi ng fan-like Webs as F' situated in the air-nozzles and serving to spread the jets and an enlargement as F2 betWeen the outer ends of the Webs and the extreme end of the air-jets.
G. In a paint-spraying device the paint-nozzle F having converging side Walls formed with fan-like Webs F', grooves F2 and smooth ends F3 said nozzle having straight lateral edges F4 in combination with the air-nozzle A having converging side Walls A and lateral grooves as A4 adapted to receive the lateral edges F4 of the paint-nozzle.
7. In a paint-spraying device adapted to be held in the hand and having an oil-reservoir as J' the combination with said reservoir of a paint-delivery pipe as B5 having an oblique endBG in the reservoir, an obliquely-set val-ve O7 adapted to close said pipe end and a valvestem O set substantially at right angles to pipe B5 and extending outside of the reservoir.
8. In a paint-spraying device adapted to be' held in the hand and having an oil-reservoir as J the combination with said reservoir of a paint-delivery pipe as B5 having an oblique end B6 in the reservoir, a paint-receivin g pipe as M having also an oblique end M in the reservoir, obliquely-set valves O7 and o7 arranged to close the pipe ends B and M',valve stems as O and extending through the Walls of the reservoir, a spring or springs as O2 oS acting to close valves O7 07 and adjustable springs as O 05 acting against springs O2 08 as described.
0. In a paint-spraying device substantially as described the paint-reservoir J' having a flexible top as K in combination With pipes B5 and M, valves adapted to close said pipes and valve-stenns secured thereto said steins passing through and being clamped to the flexible top K.
10. In a paint-spraying device substantially as described the paint-reservoir J' having a iiexible top as K and metallic cover L in conibination with pipes B5 and M, valves adapted 4to close said pipes and valve-stems secured thereto said stems passing through and being clamped to the flexible top K, springs as O5 fr arranged to press down on the valve-stems and adjusting-screws as O4 o4 for regulating the tension of said springs.
ll. In combination with a hand paint-spraying device having iiexible supply-pipes M2 and S2 a portable reservoir T having a pipe U3 connecting with the reservoir at top and bottoni, a receiving connection as U2, valves as V and V' situated below and above connection U2, an escape-opening as U7 situated above valve V', a valve V2 controlling the escape-openin g, a connection U2A for iexible pipe S2 situated between v-alves V and V', and a connection U10 for pipe M2. i
l2. In combination with a hand paint-spray ing device having ieXible supply-pipes M2 and S2, a portable reservoir T having a pipe U2 connecting with the reservoir at top and bottoni, a receiving connection as U2, a pressurereducing valve U situated therein, valves as V and V' situated below and above connection U2an escape-opening as U7situated above valve V' a valve V2 controlling the escapeopening, a connection U9 for flexible pipe S2 situated between valves V and V' and a connection U10 for pipe M2.
F. S. BEREsFoRD, H. W. DIEM.