US973663A

US973663A - Blow-off valve.

Info

Publication number: US973663A
Application number: US55605910A
Authority: US
Inventors: Henry W Jacobs
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-04-18
Filing date: 1910-04-18
Publication date: 1910-10-25
Anticipated expiration: 1927-10-25

Description

H. W. JACOBS.

v BLOW-0P1 VALVE.

AIPLIUATIOK FILED n11. 12,1910.

Patented Opt. 25, 1910.

HENRY W. JACOBS, F TOPEKA, KANSAS.

BLOW-OFF VALVE.

Specification of Letters Patent.

Patented Oct. 25, 1910.

Application filed April 18, 1910. Serial No. 556,059.

To all uihom it may concern:

Be it known that I, HENRY I citizen of the United'State's, and resident of steam boiler but more especially to the boiler I of a locomotive. As blow-oil valves are subthe injurious effects of sediment and scales found in the water of a boiler, I

jected to have so designed my valve that the means for making e valve steam and water tight are not brou ht into direct contact with the blow-oflt pr nets.

' A further object of my invention is to provide a simple construction employing few parts; the parts subjected to wear being easily removed and "replaced or renewe without the necessity of removing the valve from the boiler, thereby obviating the ditliculty caused by the necessity of frequently having to remove valves of this nature from the boiler for. repairs.

' The nature of my invention will be more fully understood from the following detailed description of the drawing, wherein- Figure 1 is a vertical cross-sectional view 'throu "h the valve. Fig. 2 represents a horizonta sectional view on line A--B of Fig. 1. 3. is a perspective view of one form on style of packing ring. Fig. 4 is across sectional view of the packing ring shown in Fig. 3. Fig.'5

.fied form of packing members as shown.

is a cross-sectional view of a packing ring composed of metal and fibrous material. Fig. 6 1s a Silllllfll' vlew of a modirin com risin four 'My invention consists of the hollow cylin I drical plunger 1, which is open at the bottom and one side. The plunger is mounted in a suitable casing or body 2, in which it is caused to reciprocate by means hereinafter specified. .T-he valve-body 2 is provided with a hollow passage or inlet opening 3 which communicates with an opening in' the side of the hollow cylindrical plunger 1 when the latter is in its'lower or open position as shown in Fig. 1, thus forming a continuous pgssage through which the contents of the.

iler may escape. When the hollow cylindrical plunger 1 is moved toward the other W. J ACOBS, a.

I have invented a certain new and useful Improvement in Blow-Oil Valves, of rcferagainst the packin rotatingand getting out vided at its free end with sin-opening or upper portion of the casing 2, the passa e in the valve body or casing will be closed y the wall of the plunger; the opening in the plunger side being moved out of register with said passage 3 in the casing 2. To prevent the contents of the boiler from escapingbetween the walls of the valve cas- Y ing and the plunger, packing rings 4 and 5 are provided above and below the passage through the valve-casing and surrounding the cylindrical plunger 1. These packing rings 4t and 5 may be made of any suitable material but preferably of metals and composed of several members or rings as illus trated, and are laced-on the beveled surfaces in the-i tenor of the casing above and below the inlet opening. The top packing ring 4, is adjusted to the desired ressure by means ofthenuts 6, 6, on the stu s 7,7; the tightening of the nuts will force the tapering end or face of the cy indrical'valve cap 8 and compress'it. It is at other means maybe evident however, t y employed to form a tight joint between the plunger and its casing.

The valve cap 8 is with a square opening which the rectangular stem 9, attached to the cylindrical plunger 1, passes. This stem is preferably screwed. into the upper wall of the plunger as shown; the stem may be provided with a shoulder adj acent the screwthreads adapted to take 'onto the lunger and insure. a tight joint being forme at the point of attachment. This rectangular stem passing through a-square opening in thecap 8, prevents the cylindricalplunger 1, from of faline'ment. The also prevents dust" preferably provided in its top through valve cap, or member 8 'or. dirt gettin on the smooth exterior sur- 1 face of the cy indrical plunger 1 and there i by carried into the casing 2 and embedded p, in the packing rin s. i The bottom pisc ing ring 5 ,is adjusted J99" tightening the nuts. 10., 10, the studs 1 1,- 11, whereby the tapering end-orffacexofjt a cylindrical member or sleeve .12; wi11 I forced against the packing ring and press it. The sleeve or valve cap-12 '1s" rably threadedas shown, pipre maybe attached.

' he valvemay-be-operatec'l. byany'.

to which able mechanism attached to the eye-coupling; 1.3, suitablysecured tothe stem g I preferJtocmpl y composite pacl'tji'ngof the ring 14; the tapered edges of the composite rings conforming with the beveled or sloping walls or surfaces of the easing-interior and the ends of the cap and sleeve members 8 and 12 secured at opposite ends of the casing as shown in Fig. 1, so

. that the rings tend toward the plunger- The rings 14, 15, andlfi are shown split, see Fig. 3, permitting of their adjustment, that is contraction or expansion, through the action of the adjusting means heretofore described. When insertin the packing, the rings composing the pac ring are so placed as to bring the split portions-at different points about the peripheries of the packing as shown in Fig. 3. By staggering the rings in this manner, the possibility for leakage through the packing is obviated. v

I prefer to employ metallic packing composed of three rings as described and shown in Figs. 1, 3 and 4', but instead of using the metallic ring 14, a rin 17 of fibrous material may be employe as this ring is not subjected to the conditions encountered by the rings 15 and 16, which contact with the plunger.

I find that a much more eflicient packing is produced by employing a number of rings; and instead of using three rings as described, the number may be varied, as shown for example in Fig. 6, where the packing, in addition to the rings 15 and 16, is composed of the outer rings 18 and 19; that is, the outer ring 14 shown in Fig. 4 is divided into the separate rings 18 and 19. By employing at least two rings 15 and 16 for the inner circumference of the packing, it is apparent that theslits in the respective rings may be so laced as to prevent a direct passage throng 1 the packing.

The construction I have devised overcomes difiiculties that have been encountered in the constructions heretofore employed; and at the same time a device simple and inexpensive in construction is produced.

As the device illustrated and described may be altered in minor details without departing from the spirit of my invention, I do not wish to be understood as limiting myself to the exact construction shown and described, but

1 lVhat I claim and: wish to secure by Lettcrs Patent, is l 1. A blow-01f valve comprising a casing having inlet and outlet op rln S, the inner wall of the casing being provic ed with oppositely beveled surfaces above and below the inlet. opening, a hollow cylindrical plnnger open at one end and provided with an opening in its side Wall adapted to register with the inlet opening in the casing, means secured to the closed cnd of the plunger whereby the latter is reciprocated in the casing, members adjustably secured to the opposite ends of the casing, one of said members having a closed end to form a hood into which the plunger 1.'c *i ')rocates when the valve is closed, a pair of beveled C0111- posite meking-rings seated on the beveled surfaces in the casing, and means-wherel y the packing-rings are cmltrolled.

2. A blow ofl valve comprising a casing provided with inlet and outlet; openings, a hollow cylindri tal plunger open at one end and having an opening through its side-wall whereby a passage through the plunger is formed, a pair of packing rings arranged within the casing on opposite sides of the inlet opening, members adjustably,secured, one to each end of the casing, and arranged to press the rings against the plunger, one of said members being closed at its outer end to form a hood within which the plunger takes when valve is lolosed, and means for operating said plunger.

3. A blow-off valve comprising a casing provided with inlet and outlet openings, a hollow cylindrical plunger open at one end and having an opening through its-side-wall whereby a passage through the plunger is formed, a pair of composite packing rings arranged within the casing on opposite sides of the inlet opening, members adjustably secured, one to each end of the casing-and arranged to press the rings against the plunger, mechanism secured to the closed end of the plunger whereby the latter is "operated, one of said members being closed at its outer end to form a hood through which the operating mechanism takes and into which the plunger moves when the valve is closed.

4. A blow-off valve comprising a casing.

provided with inlet and outlet openings, the interior of the casing being provided with beveled surfaces on opposite sides of. the inlet opening, a pair of packing rings whose edges taper toward the outer circumference and take against the beveled surfaces ,in the casing, a hollow cylindrical plunger open at one end and provided with an opening through the side-wall to form a passage through the plunger, a pair of members provided with beveled ends taking within the casing and onto said rings, one of said members having a closed end to form a hood within which the plunger takes when in its closed position, and means whereby the pressure of said members on the rings may be regulated.

5. A blow-off valve comprising. a casing provided with inlet and outlet openings, the interior of the casing being provided with beveled surfaces on opposite sides of the inlet opening, a pair of packing rings whose edges taper toward the outer (aircim'iference and take against the beveled surfaces in the casing, a hollow cylindrical plunger open at one end and provided with an opening through the side wall to form a passage through the plunger, a pair of members provided with beveled ends taking within the casing and compressing the rings, one of said members having a closed end to form a hood within which the plunger takes when in its closed position and means extending through said hood whereby the plunger is reciprocated, the relation between. the means and hood being such that the plunger is held against rotative movement.

(i. The combination in a blow off valve, of a casing open at both ends and provided with a side opening, the casing-interior be ing provided with beveled surfaces at opposite sides of the side-opening, a hollow plunger open at one end and provided with an opening through its side adapted to register with the side opening in said casing, a hollow member adjustably secured to each end.

of said casing, the one member constituting a (continuation of the outlet passage of said casing into which the plunger moves when the valve is open, while the other member constitutes a hood into which the plunger is adapted to take, said members being provided with beveled ends adapted to take into the casing, and composite packingrings provided with beveled edges arranged intermediate of the beveled surfaces in said casing and the beveled ends of the members and taking about said plunger with means whereby said members are secured to said casing and the relation between the packingrings and the plunger controlled.

HENRY V. JACOBS. Witnesses:

DAVID H. OWEN, D. O. THOMAS.