US2236625A - Valve for stencil brushes - Google Patents

Description

April 1, 1941. w, QMARSH m1 2,236,625

VALVE FOR STENCIL. BRUSHES Filed De. 21. 1938 xfa-1"' 47 45 46 /X a l:

Patented Apr. 1, 1941 ville, Ill., assignorsg: to :Marsh Stencil Machine Company, Belleville, Ill.,' a corporation of Illi- Application December-21, 1938, Serial No. 246,954

4 flaims.` (Cl. 251-50) The present invention relates 1generally'to fluid dispensing devices, and more particularly f to' fountain brushes finding special application in stencilling, each of which includes an:adjustable valve having means for maintainingthe same in pre-selected disposition.

An. object of the present invention is to provide a fluiddispensingdeviceffwhichincludes novel adjustable means for regulating the ow'of fluid therefrom.

Another object is to provide a fountain brush which includes an adjustable I`valve having vmeans for maintaining the -same4 in preselected position:

Anotherobject is to provide a. fountain brush which includes an adjustablevalve-adapted to positively regulate the flow ofv liquidfroma con? tainer to the applying portion of the brush.

Another object is to provide a novel fountain brushvalve assemblage.

Another `object is to -provide affountainV brush which can befreadily constructed,- lwhichis easily manipulated', and which'is adapted to fulfillr allv of the objects and advantages sought therefor.

Other obj'ectsand advantages will bevapparent from the following description, taken in conjunction with the accompanying drawing, in"

which: A

Fig. 1 isa Iside view of a fountain brush "constructed lirraccordancewith the teachings of the present invention; i

Fig. 2 is a section on the line 2 2 ofwFigul; Fig. 3 is a secti-'on onthe line 3"-3 of 'Fig.-l, showing the valve in closed position; andJ Fig. 4 is a fragmental section of the -valve taken on the-line -3-3 of Fig. 1, showing the va-lve'inv fully open position.

Referring to the drawing more particularly by reference numerals, I I) indicates generallya foun-v tain brush constructed in accordance with the concepts of the-present invention. The brush I0 includes a centrallyv disposedbody section II, which may be a casting, a bristle assemblage I2, and a cap I3.

The bristle assemblage I2 includes an externally threaded ring I5, and a member I6 comprising a dat annular portion Il and a conical shaped portion I8. Bristles I9 are tightly wedged between the conical shaped portion I8 and the interior of the ring I5 (Fig. 3).

'I'he body section II is preferably of the configuration shown in. the drawing, including an upper annular flange 20, a center portion 2| of oval exterior cross-section, and a lower internally threaded cup portion 22. The bristle assemblage I2 threadedly engages the cup portion 22,

major length of the passage 21 and including opposed`apertures36 and 3| disposed to form a continuation of the passage 25. A sto-p member 32 closes the inner end of the sleeve 29;v Acasing 34 having a reduced externally threaded portion 35 and an enlarged internally threaded portion 36 threadedlyengages the outer portion of the passage 21.` The casing 34 includes a well 31 which is reduced adjacent one end to form an" annular opening 38. A plunger 4I) has an en' larged plunger head 4I and ashoulder 42 located within the sleeve 29, and a reduced extension 43 extending through the opening 38 and int-o the well 31 ofthe casing 34. The reduced extension 43 islthrea'ded at 45 and receives ay turn buttony 46,- which engages the aforesaid threaded end of the extension 43 by internal threads 41 and Which engages the internal threads of the casing- 34 by external threads 43. Packing 5U surrounds the extension 43 Within the wel1'31 adjacent the-opening 38. One washer 5I 0f a pair of contiguous washers 5I and 52 presses against the packing 50, being forced thereagainst byy a strong helical spring 53, the other end of said spring 53 labutting the turn button 46 V(Fig. 3). The spring 53 has relatively sharp endsl 53' which, in effect, key the spring 53 to the button 46 and to the washer 52.

Thecap I3y is preferably of the elongatedcylindrical configuration shown clearly in Fig. 1.

`It includes internal threads adjacent the open end'which engage external threads on an annular extension 54 of the central body section II. A gasket 55 seals the cap I3 with respect to the annular ange 20. In Fig. 3, duid 56 is indicated as within the sump 26 and the cap I3.

Suitable materials are, of course, employed for the several elements of the fountain brush I0. Brass has been found highly suitable for the construction of the component elements of the valve assemblage 28. Aluminum functions well for the central body section II. It is, of course, apparent that the particular shape of the central body section I I may be varied within the scope of the invention, as may other elements o-f the brush I0.

The operation of the fountain brush I is quite simple. The cap I3 is removed from the central body section II, inverted, and filled with ink, or other suitable uid. The assembled bristle assemblage I2 and central body portion II, the valve assemblage 28 being in the closed position of Fig. 3, are inverted and securely threaded into assembled relation with the cap I3. The fountain brush I0 is then ready for use.

With the brush I0 in the position of Fig. 1, the turn button 46 is rotated counterclockwise to move the plunger 4D to the right (Fig. 3) to open the passage between the sump 26 and the bristles I9. In Fig. 4, the valve assemblage 28 is shown in fully opened position, permitting a maximum flow of ink 56 into the passage 25. The opening between the plunger head 4I and the stop 32, of course, determines the flow of ink 56 into the passage 25.

The helical spring 53 and the washers 5I and 52 disposed within the well 31 of the casing 34 function to maintain the valve assemblage 28 in the selected relationship. The spring 53 through its sharp ends effectively keys the Washer 52 and the button 46 so that all three elements move as a unit. The washer 5I remains Stationary. Therefore, friction between the washers 5l and 52 multiplied by the force of the spring 53 maintains the valve assembl-age 28 in selected disposition. It is important that the valve assemblage 28 be maintained in its selected position in order to insure the continued selected flow of ink to the bristles I9.

It is to be noted that the shoulder 42 of the plunger 40 abuts the inner end of the casing 34 to limit the movement of the plunger 40 to the right. When the shoulder 42 is in abutting relation with the inner end of the casing 34, the turn button 46 cannot be rotated further in a counterclockwise direction relative to the casing 34, inasmuch as the turn button 46 threadedly engages both the casing 34 and the free end of the extension 43 of the plunger 40. This relationship of parts canI be readily grasped from an inspection of Fig. 4. This relationship of elements prevents the accidental removal of the turn button 46.

It is apparent that there has been provided a fountain brush which fulfills all of the objects and advantages sought therefor. It is to be understood that the foregoing description and accompanying drawing have been given by way of illustration and example, and not for the purposes of limitation, the invention being limited only by the claims which follow.

Wha-t is claimed is:

1. In a device of the kind described, an adjustable valve unit disposed to vary the crosssection of the fluid passage of a fountain brush, said valve unit including a plunger threadedly mounted in an intermediate section of the brush for minute determination of the flow section of the passage, and a spring and washer means maintaining said plunger in selected position, said spring, washer and plunger being connected for simultaneous movement.

2. In a device of the kind described, an adjustable valve unit disposed to vary the crosssection of the fluid passage of a fountain brush, said valve unit including a sleeve disposed across said passage and mounted in an intermediate section of the brush, a stationary member in one end of said sleeve, opposed openings in said sleeve effecting a passage continuation, a movable plunger in said sleeve including a head adapted toclose said effected passage and including an extension, a casing secured to the defining wall of the passage, said extension ex tending through said casing and receiving an adjustment button, said button being threadedly engaged with said casing, and a sharp-ended spring disposed `in said casing abutting an integral internal shoulder of the button at one end and one of two contiguous washers at the other end to cooperate therewith to maintain said plunger in selected position.

3. In a -device of the kind described, an adjustable valve unit including a plunger adapted to be moved to vary the cross-section of a iiuid passage, an operating member connected thereto, and means to maintain said plunger in selected position including a spring having positive engagement with the operating member and with an element movably mounted in respect to said plunger and frictionally engaging a. contiguous surface, said spring, operating member and element rotating as a unit when said operating member is rotated to adjust the valve unit.

4. In a device of the kind described, a valve support, an adjustable valve unit supported thereby and disposed to vary the cross-section of a fluid passage comprising a plunger including a portion adapted to be moved to positions to vary the fluid passage, an operating button secured to said plunger, a casing secured to the Valve support, said casing threadedly receiving said operating button, a pair of washers about said plunger within the casing remote from kthe button, and a helical spring about said plunger within the casing, said spring being sharpened at each end, one end biting into an internal abutment of the button and the other end biting into one of the washers whereby said button, spring and washer move as a unit, the friction between the two Washers and between the washer remote from the spring and its 'contiguous surface positively maintaining said plunger in selected position.

WALTON C. MARSH. HERBERT W. HEMPEL.

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