US 1169587 A
Description (OCR text may contain errors)
O. C. WOLD.
APPLICATION FILED MAY 24, 1915.
Patented J an. 25, 1916.
3 SHEETS-SHEET 1- magma ($4M z/mdd O. C. WOLD.
APPLICATION FILED MAY 24, 1915.
Patented J an; 25, 1916.
3 SHEETSSHEET 2- mwm O. C. WOLD.
APPLICATION fILED MAY 24, 1915.
l mma? Patented Jan. 25, 1916.
f .flf 3 SHEETS-SHEET 3.
oLAUs c. worn, or cnrcaeo, ILLINOIS.
Specification of Letters Patent.
Application filed May 24, 1915. Serial No. 30,078.
To all whom-it may concern Be it known that L'OnAus C. Won), a citizen of the United States, residing. at Chicago, Cook county, Illinois, have invented certain new and useful Improvements in Air-Brushes; of which the following is a specification.
' The present invention has reference to im prover'nents in air brushes and has particular reference to improvements in that type of air brush intended for comparatively heavy or coarse work, although it will appear that certain features of the invention are in no I wise limited to this particular class of service.
The main objects of the invention are to provide a construction of simple design and arrangement in which. a. common trigger will serve to open, the air valve and thereafter the needle valve so as to insure a delivery of air before the pigment commences to How. Also in this connection to so arrange the parts that'after the air valve has been opened the amount of needle valve opening may be controlled so as to deliver a larger or smaller stream of pigment accordmg to the desires of the operator.
Another object is to provide a construction such that the needle can be easily removed either for replacement or repair, without in' any manner interfering with the adjustment and assemblage of the other parts. This is a feature of considerable importance for the reason that it may be desirable to regrind the needles from time to time, or to insert another needle of different form or size.
Still another feature of the invention has reference to the construction of the trigger whereby the air and needle valves are controlled. objects .in this connection being to so form thetrigger that it can be readily inserted into or withdrawn from the barrel of the instrument without the necessity of using-special tools..
Another feature .of the invention has reference to the provision of a mechanical construction such that the trigger can be .Very' conveniently manipulated bv a finger of the hand which grasps the handle of the instrument, thus making it possible to manipulate the instrument in a manner very similar to the manipulation of a pistol or revolver.
Other obiects and uses will appear from a detailed description of the invention which consists in the features of construction and combinations of parts hereinafter described and claimed.
Referring to the drawings, Figure 1 shows a side elevation of the assembled instrument, the instrument being provided with a jar for carrying the color or pigment; Fig. 2 is a view similar to that of Fig. 1, with the L the general arrangement of the air and pigment passages; Fig. 6 is a section taken on the line 66 of Fig. 3 looking in the direction of the arrows; Fig. 7 'is a section taken on the line 7-7 of Fig. 4 looking in the direction of the arrows; Fig. 8 shows a horizontal section through the barrel of the instrument and discloses particularly the air connection from the air valve to the nozzle; and Fig. 9 is an enlarged detail section of the tip of the instrument.
Referring to the several figures the instrument comprises a barrel portion 10 to the rear end of which is connected the handle 11 and to the front end of which is connected the pigment supply pipe 12. The handle is conveniently formed from a tubular member 13, the upper end of which threads onto a. nipple 14 extending down from the barrel, and the central portion of which carries a grip 15 of fiber or other suitable material. The tubular member 13 carries a finger rest a or the like 16 at its upper end so that when connection 17 to which the air hose may be connected. The bore of the upper portion of the member 13 is sufficiently large to accommodate the air valve 18. the construction of which is shown in detail in Figs. 3 and .4. hen the air in the hose which is at-v tached to the connection 17 is turned on the outside of the valve 18 1s sub1ected to air pressure.
'lPatented Jan. 25, 1916.
' the lug 14 to the barrel.
Referring to Figs. 3 and 4 the air valve 18 comprises a bushing 19, the upper end of which carries a lug 20 which threads into the lug.14, and the lower end of which carries a hollow nut 21. The movable member of the valve comprises a pin 22 seating snugly in a central perforation of the lug 20, and having the circular flange 23 near its'lower end. Beneath the circular flange 23 is the lug 24 which seatswithin the spring 25. The lower end of this spring rests against the hollow nut 21, which nut keeps the spring under compression for the purpose of raising the valve into the closed position shown in Fig. 3.
The pin 22, immediately above the flanged portion 23, is of reduced diameter, as shown at 26, so that when the valve pin is forced down against the spring the air can pass up around said reduced diameter portion into the passage 27 which extends up. through As shown in Figs. 7 and 8, this passage partly encircles the bar rel, and connects by means of a tube 28 with an annular air space 29 near the forward end of the barrel. A plurality of perforations 30 deliver the air from the space 29 to the space contained within a cap 31 on the front end of the instrument.
In the lower portion of the barrel is the slot 32 within which works the trigger 33 and the lever 34. This lever is pivoted at the point 35 and has a pin 36 which limits its upward travel. The pin 22 presses up against the lower face ofthe lever finger and when the air valve is closed holds said finger substantially in the position shown in Fig. 5. The forward face 37 of the lever is tapered or slanted substantially as illustrated in Figs. 3, 4 and 5, for the purpose presently to be described.
The trigger has the hook 38 on its upper end, said hook having a slot which faces forward and receives the pin 39 extending across the barrel. The lower end of the trigger has the finger piece 40 whereby it may be manipulated by the forefinger. It
will be seen from the foregoing that rnanipulation of the trigger in this way will keep its upper end properly hooked onto the pin 39 provided the resistance to be overcome is applied against the central portion of the trigger.
The rear end of the barrel has the hollow nut 41, the inner and outer faces of which are threaded. Inside of this nut there is threaded a hollow bushing 42, the rear portion 43 of the bore of which bushing is of enlarged size. This bushing. being connected rigidly to the barrel, constitutes, in effect, a stationary abutment. Inside ofthe said bushing is a sleeve 44, the forward end of which carries an enlarged head 45, and the rear end of which has applied thereto the cap 46. A spring 47, interposed between .or initial position.
Inside of the sleeve 44 is another sleeve 48, the forward end 49 of which is of enlarged size and works nicely inside of the sleeve 44, and the rear end of which works freely through a perforation in the cap 46.
A relatively light spring 50 seats between the sleeves 44 and 48, and exerts a pressure between the enlarged head 49 at one endand the cap 46 at the other. The 'rear end 51 of the sleeve 48 is threaded and carries a flange 52 which may seat against the'abutment when the sleeve 48 is in its extreme forward position. Furthermore said end 51 is split and its threads are tapered so that a nut 53 threaded onto said end will clamp the split portion together.
The needle rod 54 extends through the body of the sleeve 48, through the head 45, and through a slot 55 in the central portion of the trigger, and then extends forward into the front portion of the barrel. The front end of said needle rod works in a tapered cap 56 which closes the space 57 in connection 12. The needle rod works nicely through a bushing 59 so as to preyent a back flow of pigment and so as to prevent a suction into the space 57 when the instrument is being used. I
From the foregoing description it will appear that upon forcing the trigger backward the pressure so exerted on the head 45 will force back the sleeve 44 against the force of the spring 47. Owing to the force of the spring 50 there is a tendency for the sleeve 48 to be carried forward, and such forward movement may be arrested by the engagement of the flange 52 against the abutment. It will be noted from an examination of Fig. 3 that in the position therein illustrated the enlarged portion 49 of the sleeve 48 does not contact with the head 45 of the sleeve 44, and neither does the cap 46 contact with the flange 52 in said position. It therefore follows that as the sleeve 44 commences its backward travel the sleeve 48 will remain stationary for the time being,
.the spring 50 meanwhile expanding'so as to Sitluned with respect to the lever 34 that almost as soon as the backward movement of said head commences itwill engage-the face 87 of the'lever and cause the lever to tilt down into theposition illustrated in Fig. 4. T hereupon the air valve will be opened and the supply of air will commence. When the air valve has been fully opened the head i5 will ride over the edge of the face 37, maintaining the air valve locked in the open position. As soon as this occurs the lost motion previously described will have been taken up, and from that time on the sleeve 48 will be forced back in case the trigger be drawn farther back.
By reason of the clamping connection obtainable through the use of the nut 53., the needle rod can be locked to the sleeve -18 at any desired position of the needle rod with respect to said sleeve. It is thus possible to lock the needle rod at such position with respect to the sleeve 18 that when said sleeve is restored to its forward position the needle valve will be entirely 'closed to shut off the supply of' pigment. On the other hand as soon as the sleeve 18 begins to travel backward the needle valve will commence to open and the amount of such opening may be readily controlled by manipulation of the trigger, meanwhile maintaining the air valve fully opened for the full supply of air. By this arrangement it is possible to secure a "cry nice and accurate control of pigment flow.
Ordinarily the rear portion of the mechanism will be closed by a hollow cap 59, which nevertheless may be provided with a perforation through which the needle rod and nut 53 may work. Oil introduced through the opening 61 above the trigger will find its way down onto the trigger and also onto the needle rod so as to work along said rod into the moving parts which are illustrated in Figs. 3 and 4. In Fig. I
I have shown a jar 62 as threaded onto the connection 12,, whereas in Fig. 2 l have shown a pipe 63 threaded onto said connection, and it may be held rigid by means of a plate 64: extending across to the lower end of the handle. This latter type of construction is well adapted for use in those cases where relatively large surfaces are to be rapidly colored.
While I have herein shown and described only a single embodiment of the main features of my invention, still it will be understood that I am not limited to the same except as I may limit myself in the claims.
1 claim: I
1. in a device of the class described the combination with a suitable casing, of a pigment connection in the forward portion of the casing, a handle downwardly depending frcnrthe rear portion of the casing, said handle being hollow and provided with an air connection at its lower end, an air valve in the upper portion of the handle, a nozzle on the front end of the device, a connection from'the pigment connection to said nozzle,
a needle rod for controlling the nozzle, a sleeve slidably mounted on the needle rod, means for clamping said sleeve to the needle rod at any desired position of adjustment, a
second sleeve outside of. the first mentioned sleeve, a spring acting between said sleeves and tending to carry the first mentioned combination with a suitable casing having a pigment connection in its'forward portion and an air valve in its rear portion, of a needle rod for controlling the delivery of pigment from the pigment connection, a sleeve slidably mounted on the needle rod, means for securing said sleeve to the rod at any desired position of adjustment, a second sleeve slidably mounted on the first mentioned sleeve, a spring acting between said sleeves and tending to carry the first mentioned sleeve forward and the second mentioned sleeve backward, an abutment, a spring acting between the second mentioned sleeve and the abutment and tending to carry said sleeve forward, a trigger, an operative connection between the trigger and the second mentioned sleeve, and an opera= tive connection between the second mentioned sleeve and the air-valve.
3. In a device of the class described the combination with a suitable casing, ofa pigment connection in the forward portion of the same, an air valve in therear portion of the casing, a needle rod for controlling the delivery of pigment from the pigment connection, a sleeve slidably .mounted on the needle rod, means for securing said sleeve to the needle rod at any desired position of adjustment, a second sleeve slidably mounted on the first mentioned sleeve, a. spring acting between said sleeves and tending to carry the first mentioned sleeve forward and the second mentioned sleeve rearward, there being cooperating parts on said sleeves to limit the extent of such relative movement, an abutment, a spring acting between said abutment and the second mentioned sleeve and tending to carry said sleeve forward, an operative connection between the second mentioned sleeve and the air valve, and means for operating the sec- 'ond 'mentioned sleeve against the force of the second mentioned spring, the parts I. being relatively so proportioned that when the second mentioned sleeve is operated the air valve opens before the relative movement between the two sleeves ceases.
4; In a device of the class described the combination with a suitable casing, of a pigment valve in the forward portion of the same and an air valve in the rear portion of the casing, a needle rod for controlling the opening of the pigment valve, a sleeve slidably mounted. on the needlerod, means for securing said sleeve to the needle rod at any desired position of adjustment, a second sleeve slidably mounted on the first mentioned sleeve, a spring acting between both of said sleeves and tending to carry the first and tending to carry said sleeve forward,
a lever pivoted to the casing and acting on the air valve, a trigger mounted in position to engage the second mentioned sleeve, and a part carried by the second" mentioned sleeve in position to engage the leverfor the purpose of rocking the same to thereby open the air valve when the rearward movement of the second mentioned sleeve commences,
.the parts being so proportioned that the lever is fully rocked before the completion of the relative movement between the two sleeves.
5. In a device of the class described the T combination with a suitable casing, of a pigment valve in the forward portion of the same, an air valve in the rear portion of the casing, a needle rodfor controlling the opening of the pigment valve, a part se cured to the needle rod, a sleeve slidably' mounted with respect to said part, a spring acting between thesleeve and said part and i tending to carry the needle rod forward and the sleeve rearward, means for limiting the extent of such relative movement, an abutment, a spring acting between the abutment and the sleeve and tending to carry the sleeve forward, a trigger mounted in posi- 5 tion to engage the sleeve to move the same rearward against said spring, a lever pivoted to the casing and mounted in position to engage the air valve, and a part on the sleeve, adapted to engage the lever to rock the same when the movement of the sleeve against its spring commences, the parts being so proportionedflthat the lever is fully rocked before the relative'movement between the needle rod and the sleeve 0 ceases.
6. In a device of the class described the combination with a suitable casing, of a pigment valve in the forward portion of the same and an air valve in the rear portion of the casing, a needle rod for controlling the opening of the pigment valve, a part carried by the needle rod, a member slidably mounted with respect to said -part,
a'spring acting between the part and the slidable member and tending to carry the part forward and the slidable membertrearward, an abutment on the casing, a spring acting between said abutment and the slidable member tending to carry the slidable member forward, a trigger mounted in position to actuate the slidable member rearward against said spring, a lever pivoted to the casing and acting on the air valve, and
a part carried by the slidable member and adapted to engage the lever to rock the same for opening the air valve, the parts being relatively so proportioned and adjusted that the lever will be fully rocked to open the air valve before the relative movement between the member and the needle rod ceases.
y o. c. oLn.
\Vitnesses FRANCES FRos'r, THOMAS A. BANNING, Jr.