US1270282A - Automatic valve. - Google Patents

Description

C. FHECH.

AUTOMATIC VALVE.

APPLICATION FILED DEC. 15 l9l6.

1,270,282. Patented June 25, 1918.l

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AUTOMAUC VALVE. APPLICATION FILED` DEC. 15| `|916-A Patented J une 25, 1918*.

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Chan-:IE5 Frac C. FRECH.

AUTOMATIC VALVE.

APPLICATION man Dsc. 15, |916.

Patented June 25, 1919 3 SHEETS-SHEE 3.

f attorney- CHARLES FRECH, OF STEELTON, ONTARIO, CANADA.

AUTOMATIC VALVE.

Specicaton of Letters Patent.

Patented June 25, 1918.

Application led December 15, 1916. Serial No. 137,227.

To all whom t may concern Be it known that I, CHARuis FRECH, a subject of the King of Great Britain, and a resident of Steelton, District of Algonia, Province of Ontario, and Dominion of Canada, have invented a certain new and useful Improvement in Automatic Valves, of ywhich the following is a specification,

My present invention relates to valves and more particularly to that class which operate auton'iatically and are technically classed as force-closed mechanisms.

It is now common practice to embody in blowing engines, air compressors, and other machines, intake or discharge valves or both, which are mechanically operated, as by positive gear. These valves when in use become a source of annoyance, since one or moreof the parts frequently become broken, rendering the positive ear inoperative. Furthermore, the mechanism for mechanically operating the valves of a single machine, yin many instances, is of considerable weight, which makes the initial cost high, rendering assemblage expensive, and makes the cost of transliortation, installation, foundations, etc., expensive.

The principal objects of my invention are therefore, first, to provide valves for blowing engines, air compressors, and other machines, which arecompact, relatively light, in weight, consistent with durability, and easily assembled into operative relation to existing machines; second, valves embodying mechanism which may be either used for controlling intake or discharge of fluid; third, valves embodying flaps so mounted as to accommodate themselves to the port-contained member to effectively close the port when acted upon by suction or compression, and which are normally but yieldably held in a closing position by spring action; and,

. fourth, valves embodying parts which may be easily adjusted and replaced when worn or broken.

Other objects of my invention will appear in the following detailed description, taken in connection with the accompanyin drawings, forming a part of this speci cation, and in which drawings: i,

Figure l is an end elevation of a valve embodying my invention.

Fig. 2 is a side elevation of the same.

Fig. 3 is a view of the opposite e'nd of the valve.

Fig. 4: is an enlarged sectional view on the line 4l-4 of Fig. 1.

Fig. 5 is a. sectional view on the line'5`-5 of Fig. 4. A p

Fig. 6 is a perspective view of a fiap for controlling ports of the valve, and a portion of its supporting mechanism.

yFig. 7 is` a perspective view of another portion of the supporting mechanism of the Fig. 8 is a view partly in elevation and partly in central vertical section through a blowing tube, disclosing means for retaining the valve in operative relation thereto, and is one example of the application of my invention to machines.

In the drawings, where similar characters refer to similar parts throughout the several views, A designates a valve drum provided with ports B; C fiaps for controlling the ports B; D means for movably mounting flaps C independently one of another and vieldably holding them seated; E means limiting thel amplitude of movenlent of said flaps away from their seats; and F, a blowing tube showing one application of my valve to machines.

Referring first to the drum A, the major portion 9 is preferably polygonal in cross section, as clearly sho'wn in Fig. 5 of the drawing, presenting a plurality of flat faces 10 at the periphery of the drum and about which extends an annular flange 11 provided with a beveled face 12, adapted to seat itself against a portion of the machine in which the valve is used, as hereinafter more fully set forth.

They ports B open at the faces 10, lead from the interior of the drum, these ports being preferably elongated and extending axially of the drum as is clearly shown in Fig. 4 of the drawings, it being preferred to provide two ports open to each face 10. The drum is open at one end at the fian'ged portion, and is provided with a head 13 at its other end portion, said head being preferably pyramidal and elvtending to the in# terior of the major portion 9. When in this shape, the head has the dual function of closing one end portion ofthe, drum a'ainst the passage of uid, when in use, an' als deiecting fluid discharged through the valve toward the ports B. To strengthen the drum and divide the fluid to be discharged, a plurality of webs 14 are provided between the head 13 and the internal periph- `ery of major portion 9, said webs being radially disposed with respect to the axis of the valve. If desired, the head 13 may be provided with a screw-threaded aperture 15 at its apex portion to facilitate handling and into which the end portion of a retaining device, hereinafter ymore fully set forth, mayenter. l y

In the example shown, the apsC are formed from fiat strips of metal, preferably vanadium steel, and are provided with transverse ways 16 extending longitudinally of the flaps, each flap provided witha reducedvcndportion or stem 17, as is clearly shown in Fig. 6 of the drawings. One flap is provided for each face10 of the drum, and when seated against said face, closes the ports B open thereto, against passage of fluid from the exterior of the valve to the 'i interior thereof, the ways 16 of the iaps C offsetV with respect yto the ports B, as is clearly shown in Fig. 5 of the drawings.

- Referring now to the means E for remov- Y- ably .mounting the flaps C independently i one of another, and yieldably holding them seated, such may comprise a support 18, such as alyoke carried by drum A,-one support for each flap C; and, a coilspring 19 having its inner end portion detachably connected with support 18 and its outer end portion operatively connected with its respective flap C. The support or yoke 18 may be detachably carried by the drum A as by being provided with a stem 19 which extends through a slot 2O in a boss 21 rigid with the head 13, said boss provided with a screw-threaded aperture 22 in which a setscrew 23 has engagement, the set-screw being turned tight against stem 19 to hold thesupport or yoke in a rigid adjusted position.) Arms 24 'of yoke 18 may be provided with annularbosses 25 which confront onel another, and rengage the inner end portion of the spring 19 as is clearly shown in Fig. 4 of the drawing, each arm 24 provided with an offset 26, yperforated as at 27 through which a pin 28 extends, and against which an angular portion 29 of the spring 19 abuts in a manner to place the ber of the spring undercompression. The outer end portion of the spring `may be Aoperatively secured tothe flap as by rivets 30, one or more of which' may extend through the stem 17 of theflap. It is to beobserved that the spring 19 yieldably forces the flap into en agement with its respective face 10 of the rum A,and Vthat ,by moving Athe support 18 with respect tothe body A, adjustment may be obtained4 so that` there will be surface contact betweenfthe ap andthe face ofbody A.;

contact, or, if there'is compression acting upon the outer face of the flap, said spring will yield to permit of surface contact between the flap and its seat, the function of the spring 19 being to primarily move vthe i iap toward the body A when the ports are to be closed, and rendering the valve quick in action. The bosses L25 of arms 24` may be drawn into intimate contact with the inner end portion of the spring 19 as by bolts 31, extending transversely througih perforations 32, in arms 24, andy nuts 33 turned vtight upon said bolts.

As suitable means for limiting the amplitude of movement of the iiaps C away from their seatsone or more angle-strips 34 may be provided adjacent each flapin'the exampleshown, two suchl angle-strips being provided for each flap. VOne end portion of one leg of each strip may be secured tothe drum A as by screw 35, extending through the end portion and in screw-threaded Ven-l gagement with a lug 36 which may be cast integral with major portion 9 as is clearly shown in Figs. 2 and 4 of the drawings, the other leg of the strip being secured to the end of the drum as by machine-screw 36', in

a manner that a face 37 of the strip confronts the Hap C, but is in angular relation to the face 10 against which the valve seats itself. This angular relation is such that,

when the flap moves away from the drum A,

vrwithout placing the spring 19 under undue face of the flap normally engaging the drum Aavould tend to displace the convolutions of the spring 19 and under some conditions, might result in the permanent set'ojcI the spring so that it would not primarily seat the Hap C with surface contact, 4as .here inbefore described.

In assembling the valve in operative rela-` tion for the control of fluid, by way of example, I have shown the relative' position of the drum of thejvalve in operative krelation to a blowing tube, in which the'bodies 40, disposed inv spaced relation, providey a passage-way 41 for fluid, the body having apertures and 43 in opposite walls, 44, and 45, respectively, the wall 44 being a part of a cylindricalextension 46 about which Aone end portion of a cylinder 47 slides, the end portions of said cylinder being provided with a plurality of perforations 48 for ingress of air to the interior of the cylinder. A piston 49 is reciprocable in cylinder 47 as through rod 50. The valves in this instance, are to prevent ingress of fluid from passage-way 41 to the interior of cylinder 47, and are disposed with their flanges 11 engaging the wall 44, with the open end of the drum open to aperture 42. The valves are held in place as by a bolt 51 in screw-threaded engagement with a plate 52 secured in a manner to close aperture 43, the end portion of bolt 51 being in engagement with head 13 of the drum, and, in the example shown, at the apex portion of said head. A set-nut 53 is provided on bolt 51, turned tight agalnst plate 52. The aperture 43 is of a size to permit the valve to pass entirely through the same, and, after the plate 52 has been secured in place, the bolt 51 is turned tight so that the flange 11 of the drum is in fluidtight engagement with the wall 44. As the piston 49 moves in the direction indicated by arrow in Fig. 8, air is forced through Ways B of the valve, forcing the flaps C into engagement with the strips 34, the air finding egress from the valve through ports B at all sides of the flaps and through the ways 16 of the flaps. Before the piston moves in a counter direction, the cylinder 47 is moved so that the perforations-48 provide for intake during the return stroke of the p1ston. In the example shown, the valves are therefore used to provide for the discharge of fluid compressed by the piston. They may, however, be used to provide for intake of fluid as by passingthe major portion of the drum A through aperture 42 with flange 11 engaging the wall 44, under which condition the end portion of bolt 51. which may be tapered, enters the aperture 15 in head 13, forcing the flange 11 into intimate contact with wall 44, said flange being shaped so as to prevent passage of fluid thereby.

Changes in details may be made without departing from the spirit or scope of my invention; but,

I claim 1. In an automatic valve, a valve drum with its major portion polygonal in cross section and having ports leading from its interior and open at the faces of the major portion, flaps for controlling the passage of fluid through said ports, coil springs connected to said flaps for yieldably holding them in position, adjustable means for regulating the tension of said springs and connecting said springs to said valve drum whereby limited longitudinal adjusted movement of the said flaps is permitted.

2. In an automatic va ve, a valve drum with its major portion polygonal in cross section and having ports leading from its interior and open at the faces of the major portion, flaps for controlling the passage of lluid through the said ports, yokes adjustably connected to said drum, coil springs carried by said yokes and connected to said flaps, whereby limited adjusted movement of said fiaps is permitted.

3. In an automatic valve, a valve drum with its major portion polygonal in cross section and having ports leading from its interior and open at the faces of the major portion, flaps for controlling the passage of fluid through said ports, said flaps provided with longitudinal openings which are out of alinement with said ports and permit passage of fluid through the flaps when they are in an outward position, coil springs connected to said flaps for yieldably holding them in engagement with the faces of the major portion, adjustable means for adjusting the tension of said springs and connecting said springs to said valve drum whereby limited longitudinal adjusted movement of said fiaps is permitted.

4. In an automatic valve, a valve drum with its major portion polygonal in cross section, each of the faces of said major portion provided with a pair of spaced ports leading from the interior of the drum, a fla for controlling the passage of fluid throng i each pair of said ports, said flap provided with a longitudinal opening positioned between the ports, coil springs connected to said flaps for yieldably holding them in position, and adjustable means connecting said springs to said valve drum whereby limited loi'igitudinal adjusted movement of the said flaps is permitted.

In an automatic valve, a valve drum with its major portion polygonal in cross section and having ports leading from its interior and open at the faces of the major portion7 flaps for controlling the passage of fluid through said ports, yokes adjustably connected to said drum, coil springs carried by said yokcs and connected to said fiaps, and means carried by said yokcs to hold the liber of the springs under tension.

G. In an automatic valve, a valve drum with its major portion polygonal in cross section, each of the faces of said major portion provided with a pair of spaced ports leading from the interior of the drum, a flap for controlling the passage of fluid through each pair of said ports, said flap provided with a longitudinal opening positioned bepol-ts leading from'the interior of the drum, ber of the springs under tension, straps a flap `for controlling the passage of fluid attached to seid drum for limiting the am- 10 through each pair of Said port-s, said flap plitude omovement of said aips, the inneil provided with a longitudinal opening p0-4 ffaces of said straps 'confronting said flaps sitioned between the ports, yokes edjustably near the edges 0f the flaps and at an angle connected to-said drum, coil springs carried to the faces of the drum.

by said yokes and connected to said flaps,

and means carried by said yokes to holdthe CHARLES FRECH.

Copies of thspatent'may be vobtained for 4five cents each, by addressing the Commissioner of Patents, `Vilashinton, D. G.

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