US 1951485 A
Description (OCR text may contain errors)
MalCh 20 1934- A. J. LoEPslNGER VALVE Original Filed Jan. 29, 1929 2 Sheets-Sheet l MalCl'l 20, 1934. A, J LOEP5|NGER 1,951,485
VALVE Original Filed Jan. 29, 1929 2 Sheets-Sheet 2 jy/g dw W Patented Mar. 20, 1934 ATN'' FFCE VALVE Albert J. Loepsinger, Providence, R. I., assignor to General Fire Extinguisher Company,
Providence, R. I., a corporation of Delaware Original application January 29, 1929, Serial No.
Divided and this application March l0, 1932. Serial No. 597,920
This invention relates to improvements in valves. More especially it relates to a valve having a closure adapted to move laterally across its ,seat and novel mounting means for such closure. lThis application is a division of my application Serial No. 335,908 iled January 29, 1929.
In valves of the type which are normally closed and are adapted to open automatically to permit flow of uid it is frequently desirable to have the closure member move out of the flow passage promptly and thereafter be restricted from returning to its seat until the valve is manually reset.
An object of this invention is to provide such a valve and it is a feature of the invention to mount the closure upon a novel pivot which, when the closing force on the closure is relieved, permits the closure to be lifted from its seat and tilted at such an angle to the direction of ow through the seat that the force of flow will swing the closure about its mounting laterally across its seat, and thereafter permit the closure to settle below the level of its seat thus restricting its return thereto.
It is intended that the patent shall cover by suitable expression in the appended claims whatever feature of patentable novelty exist in the invention disclosed.
In the accompanying drawings,
Figure l is a partial elevation in section of a valve embodying the present invention, the clossure being shown in full lines in its open position and in dot and dash outline in an intermediate position during the course of its opening movement;
Figure 2 is a plan showing the closure and its mounting;
Figure 3 is an elevation partly in section as on line 3 3 of Figure 2;
Figure 4 is a View of a detail, looking upward along the axis of the pivot; and
Figure 5 is a complete elevation in section or the valve partially shown in Figure l with the closure shown in closed position.
Referring more particularly to the drawings and especially to Figure 5 there is shown a valve adapted to be employed in a dry pipe sprinkler system. When so used it is connected between a supply pipe 1 and a delivery pipe 3 representative of the distributing pipes of such a system. Such a valve is held closed by suitable means and holds back a fire extinguishing fluid 4, such as water, until the need for same arises. When this occurs the valve is opened automatically and should remain open until manually reset. In the particular valve 5 shown as an example of the application of the principles of this invention there is a closure element 7 seated across the inlet 9. The valve chamber l1 and pipe 3 are in open connection with one another through the outlet 13, and normally contain air at a slight pressure either above or below that of the atmosphere. A small groove 15 in the inlet seat 9 and a drain therefrom through the customary ball drip valve 17 take care of any leakage of Water from the inlet.
The water acts directly upon the closure 7 tending to open it and also acts indirectly upon it to keep it closed until a change of the air pressure conditions bring about the opening of the valve. rIhis indirect or closing action of the water is accomplished by means of a bypassage through a pipe 19 extending from the inlet side of the closure to an intermediate portion 21 attached to the top side of the ,body portion 23. A diaphragm 25 is clamped at its periphery between these two portions and at its middle is secured to a strut member 27 which, when the valve is closed, engages the closure 7. The two portions 21 and 23 are suitablyV shaped to provide a chamber 29 for this diaphragm, with beveled seats 3l and 33 extending inward upon which an annular portion of the diaphragm may rest. The lower (31) of these seats is preferably provided with a rust-resisting metal face 35 to prevent corrosion and. any sticking of the diaphragm.
Mounted on the intermediate portion 21 is a top portion 37 having an ejector comprising an internal nozzle 39 extending within an external nozzle 41 but being slightly spaced therefrom to provide an annular passage 43 therebetween. The internal nozzle 39 is connected by suitable passages 45 in the top and intermediate portions with the pipe 19 leading from the water supply and the annular passage 43 is similarly connected by another passage 47 with the diaphragm chamber 29. Accordingly, the Water pressure is transmitted through the pipe 19, the passage 45, nozzle 39, annular passage 43, and passage 47, to the chamber 29 where it is exerted upon the diaphragm 25 and thence through the strut 27 upon the closure 7. Since the eiective opening 49 in the top wall of the body portion 23 `is somewhat greater in area than that of the inlet 9, the water pressure acting on the diaphragm over the opening 49 will hold the closure seated against the water pressure of the same intensity tending to lift it. This differential of area need not be large, indeed there may be no such differential because the weight of the diaphragm, strut and closure acts with suilicient force to hold the latter closed when the opening and closing effects of the water are in balance. However, to insure tight seating of the closure it is desirable to have a differential of area with consequent excess of total water pressure acting to keep the valve closed.
When this condition exists, the discharge port of the external nozzle 41 is closed by a needle Valve 51. The stem of this valve has pinned to it near its lower end a collar 52 upon which bottoms an expansion spring 53 coiled about the Stem and pressing also against another collar 55 loose on the stem. This latter collar is engaged by the forked arm 59 of a bell crank lever 61, fulcrumed at 62, whose other arm constitutes a ring handle 62 and latch 63. When in closed position, as seen in Figure 5, the lever depresses the loose collar 55 and by virtue of the spring 53 and pinned collar 52, forces the needle valve tightly against its seat.
When the distributing` pipe 3 contains air at a pressure above atmosphere the upper hook of the latch 63 is engaged by a lever 67 fulcrumed at 69 and disposed with its hooked rend 65 pointed downward. The other end of this lever is of ring shape fitting somewhat loosely about a spindle 71 under the lock nuts 72. A weight 73 secured upon this spindle rests upon a pressure actuated device, here shown as a siphon bellows 75 suitably mounted on the top portion 37. The interiorof the bellows is in open communication through passage 77 with the valve chamber 11 so that the air pressure of the dry pipes is acting to keep the bellows expanded and the weight suspended as shown in Figure 5.
Upon a change of pressure conditions occurring in pipe 3 as upon the opening of a sprinkler and the escape of air from the pipe or an inflow of air thereto depending upon the initial conditions, the Siphon bellows responds and allows the weight 73 to force the stem 71 downward. The lever 67 is swung about its pivot thus freeing the latch lever 63. This initial movement of the lever 61 about its pivot 62 is very rapid due to the immediate expansion of the spring 53 forcing the loose collar 55 away from the pinned collar 52 along the needle valve stem 5l up against the flanged sleeve 57 which is pinned to the stem. This rapid movement of the loose collar starts the lever 61 on its swing and the momentum of the blow delivered by the loose collar against the sleeve causes the needle valve to lift somewhat from its seat. This lifting is further augmented as the lever 6l continues its swing under the influence of gravity with its forked arm 59 forcing the sleeve 57 and needle valve upward. It is to be noted that the engagement of the loose collar 55 with the sleeve 57 renders the coiled spring 53 thereafter inactive. Upon the lifting of the needle valve, water iinmediately starts to flow through the external nozzle 41 and escapes by drain pipe 99. Such leakage as may occur about the valve stem 51 into the space of the cap 101 also drains through connection 103 into pipe 99.
The iiow through the annular passage 43 and the port of nozzle 41 acts with aspirating effect through the internal nozzle 39 to draw water from the passage 47 and diaphragm chamber 29.V This immediately reduces the excess of pressure above the diaphragm to nothing (possibly creating a slight vacuum above it) and permits the water in the inletV 9 to lift the closure 7 from its seat and flow into the valve chamber and the distributing pipe 3. The strut 27 is provided around its top edge with a depending lip 27 which ts rather close to the edge of the opening 49 so that as the diaphragm and strut move upward the opening is still substantially closed by the strut, thereby preventing any foreign matter carried by the water from entering the opening 49 and lodging on the tapered seat 3l.
Simultaneouly with the lifting of the closure 7, the latter assumes a tilted position oblique to the direct flow of water through its seat. This tilting is eiected by a novel shaping of the bearing 105 in the arm 107 of the closure, it being deformedV from a true cylindrical bearing by making one side of its upper half and the opposite side of its lower half conical in shape (see Figure 3). As it lifts, the closure as a whole assumes the position shown in dotted outline in Figure 1 with its face oblique to the water Welling upward through its seat and, in consequence, is then swung laterally about its pivot 109 to one side of its seat and entirely out of the path of movement of the strut 27. There the closure settles down again to a level a little below the plane of its seat, as seen in full lines in Figure 1, being thus prevented from again swinging thereacross until manually reset.
In setting the closure it is manually lifted upward along its pivot 109 and then swung laterally onto and across its seat, its final position being determined by the engagement of a depending lip 110 with the outer wall of the seat. Preferably there is provided a bumper 111 on the closure to prevent injury of the edge thereof when the closure strikes against the wall 112 of the valve casing at the end of its opening swing. This bumper may be made of relatively soft metal if desired to cushion the effect of the blow on the casing and thus cut down any tendency of the closure to rebound, but this is not deemed necessary for experience has demonstrated that the closure will open and settle below its seat when no such cushioning bumper is provided.
1. A valve adapted for automatic opening having an inlet passage and a closure normally seated across it and adapted to move laterally across its seat when opening; means guiding said closure in opening comprising a xed pivot extending in the general direction of flow through the seat and an arm engaging said pivot having a deformed cylindrical bearing constructed and arranged to cause said closure when lifted to tilt about said pivot so as to position the under surface of said closure oblique to a plane passing through the center of the closure and perpendicular to the axis of said pivot whereby the force of said flow acting on the closure when thus tilted swings the closure laterally across its seat.
2. A valve adapted for automatic opening having an inlet passage and a closure normally seated across it and adapted to move laterally across its seat when opening; means guiding said closure in opening comprising a fixed pivot and a bearing in said closure engaging said pivot and so shaped that upon the closure being lifted from its seat the closure is tilted about said pivot with a surface of said closure at such an angle to the direction of new through its seat that the force of the now acting on said surface effects movement of said closure laterally across its seat.
3. A valve adapted for automatic opening having an inlet passage and a closure normally seated across it and adapted to move laterally across its seat When opening; xecl means adapted to engage a bearing surface of said closure during its lifting movement; said surface being so arranged in cooperative relation to said means as to cause said closure to tilt and thus position itself at such an angle to the direction of ow through its seat that the force of said ioW acting on the closure eects movement of said closure laterally across its seat to a position where gravity moves said closure partly below the plane of its seat.
4. A valve adapted for automatic opening having an inlet passage and a closure normally seated across it and adapted to move laterally across its seat when opening; a fixed pivot beside said passageway with axis extending in the general direction of oW through the seat; an arm on the closure directly engaging said pivot, and having a hole therein of such size and shape relative to said pivot as to permit the Valve when lifted from said seat to be tilted With its surface oblique to the aforesaid direction of flow, whereby the force of flow acting on the tilted closure swings it about the pivot laterally across its seat.
ALBERT J. LOEPSINGER.