US603043A - Blow-off cock - Google Patents

Description

(No Model.)

W. MGINTOSH.

BLOW-OFF COCK.

No. 603,043. Patented Apr, Z6, 1898.

ZZZZ

i. Z YW., l

APM in Zig llilvternal screw-threads 3 are provided upon UNITED STATES.

PATnT rrinn.

W'ILLIAM MCINTOSH, OF VVINONA, MINNESOTA.

BLOW-OFF COCK.

SPECIFICATION forming part ef Leners Patent No. 603,043, dated April 2e, 189s.

i Application tiled Octoherll, 1897.

T0 LZ-Z whom, it may concern:

Be it known that I, WILLIAM MClNTosH, residing at Winona, in the county of Winona and kState of Minnesota, have invented Improvements in Blow-Off Cocks, of which the following is a specification.

lily invention relates to blow-off cocks for boilers and the like; and its object is to provide for this purpose a device under the control of any suit-able duid-pressure, which device shall, moreover, embody many novel forms of construction and have many advantages in attachment and operation.

My device maybe employed with advantage upon locomotives where an abundant supply of air-pressure is readily obtainable, although the boiler-pressure itself may be utilized for the operation of my device. I therefore do not limit myself to the application of my invention to locomotives nor to the employment of any speciiic fluid-pressure.

In the accompanying drawings, Figure lis a sectional elevation of my blow-off cock shown in position in a boiler-shell; Fig. 2, an elevation of my device; Fig. 3, a vievvr in elevation, showing my method of and means for screwingthe foundation-plug into place in the boiler-shell; and Fig. 4, a plan view of a portion of the foundation-plug.

In constructing my complete and preferable form of device I make what I term a foundation-plug l, to which is attached, as hereinafter explained, the main valve-casing 2.

this foundation-plug and engage threads in any suitable blow-off port or opening in a boiler-shell a. This plug is further provided at its inner end and within the boiler with a yoke 5, having a central opening 6 to act as a guide for a valve-stem, as hereinafter set forth.

In order to form a seat for the valve adjacent to the blow-off port, a ring is provided and is adapted to screw into the foundationplug. This ring has lugs 8 upon its top face, which are adapted to be engaged by a Spannerwrench or other suitable means for screwing the seat in place within the plug.

A valve 9, which I will term inner valve, seats against the ring or seat 7 and is provided with a stem l0, which, working in the Fig. l.

opening G in the yoke, guides the valve, there- Serial No. 654,850. (No model.)

by insuring the central position of the valve and avoiding its liability to drop down from the seat ,when placed horizontally and after it has become worn. This valve is` preferably, though not'necessarily, of the spiral win g type, as shown in the drawings.

The casing 2, ywhen placed in position upon the foundation-plug, forms or contains three chambers ll, l2, and 13, the iirst of which is adjacent to the blow-off port proper. The chambers ll and l2 are intercommunicating, and the passage therebetween is governed by a valve la, which is preferably circular and ts upon a cup-shaped seat l5. The chamber l2 is provided with an outlet-passage 16, leading to the atmosphere.

The chamber 13 is a cylinder having its outer end closed by a removable head or end plate 13, which is securely held in place by a clamping-ring 13", which is clearly shown in The fluid-pressure mechanism for actuating the valve 14. operates in this cylinder and comprises a piston-head 17, provided with a preferably solid stem I8. The bottom of the cylinder has asocket or pocket formed by a depressed portion, with upwardly-extending walls 19, forming a sleeve through which the piston-stem passes.

The valve 14, which may be termed the outer valve, is loosely and removably mounted on the piston-stem in the following manner: The free end of the stem is provided with a circular recess near the end to form an end shoulder 20, which is engaged by circular-shaped lan ges 2l preferably integral with and extending from the valve-body 14e. The distance between the inner faces of these anges is the diameter of the piston-stem at the recessed portion thereof, so that the ianges partially encompass the end of the stem and the end shoulder engages underneath the flanges. In order to center the valve and hold it in place on the stem, I employ a screw 22, passing centrally through the valve and having a reduced end or point 23 enteringa recess or hole in the end of the stem.

The cylinder above the piston-head isa passage 24, leading through the end plate and communicating through pipe 25 with a source of Huid-pressure, air, or steam, or any other suitable fluid-pressure, which is under the direct control of the engineer by any suitable ICC lprovided with a flanged edge 28, which rests upon a similar flange 29 at the top of the foundation-plug. In order to secure the parts rmly together, a coupling-ring 30, having a flange 3l engaging under the flange 29, is screwed upon the casing 2. By this means the discharge-opening 1G may be brought or adjusted to any desired position, which is im- .possible if the casing screws upon the plug.

The coupling-ring is so made as to be readily engaged by a Spanner-wrench, although any other suitable means for securing the same may be adopted. As shown in Fig. 1, a recesschamber 32, having an annular depression or groove 33, is provided near the dischargeopening for the purpose of receiving any leakage of water, the. from the valve device. This depression will collect such leakage and dispose of it through a drip-hole 34, which is located atthe lowestpoint,dependent,of course, -upon the position of the blow-off opening when applied to the boiler.

In Fig. 3 I have illustrated the following means for securely screwing the plug in the boiler and for removing it therefrom. The plug has two oppositely-disposed internal recesses 35, which are adapted to receive two lugs 38 upon what I term a disk nut 36, having a square or otherwise angular head 37, so as to be capable of being turned with an ordinary wrench, and is clamped to the plug by means of the clamping-ring 30. When the parts are assembled as shown in Fig. 3, the plug can be easily and securely screwed into the boiler and as easily removed by reason of the attachment of the disk nut thereto, whereby a powerful means of screwing the plug into the boiler is provided. Vhen so secured, the ring may be unscrewed and the disk nut removed therefrom, whereupon the casing 2 is placed in proper position on the plug and the discharge-opening adjusted in the proper direction,dependentupon the place of use, or as may be otherwise desired, after which the clamping-ring 30 is screwed up to couple the parts together.

My device operates as follows: When it is desired to blow off the boiler, air, steam, or

any other suitable Huid-pressure is admitted through supply-pipe 25 to cylinder 18, moving the piston and stem downward and forcing the valve 14 from its seat. After a slight initialmovement of suoli valve the head of the bolt or screw 22 strikes the inner valve and forces it from its seat, whereby an opening is made from the boiler through chambers 11 and 12 and out to the atmosphere through the discharge-passage` 16. When the pressure on the piston is released, the sprin g seats the outer valve, while the boiler-pressure seats the inner valve, these valves preferably seating independently. I provide the duplex valves for safety, as it is obvious that the upper casing maybe broken off from the plug,leaving the inner valve to close the blowoff port; but it is apparent that the inner valve could be dispensed with and that such valve could be connected to the piston-stem and the outer valve be dispensed with, although for 'all practicalv purposes it is preferable to employ the duplex valve seating independently, as shown and described.

I prefer to make the end plate or cap of the cylinder removable and to clamp it into position, as shown, so that it may be adjusted in different positions to allow the opening for admission of pressure to be adjusted. If this opening or supply-port was in the center of the plate,such adjustment would be unnecessary; but as it is desired to use the center 1 for other purposes the supply-port is located nearer the edge or rim of the cap and a clam ping-ring is employed, so that the main casing can be changed to any position without disturbing the position of the cap as related to the supply-pipes.

Although I have described or shown more or less precise forms and details of construction,I do not intend to be understood as limit- I ing myself thereto, as I contemplate changes in form, proportion of parts, and the substitution of equivalents as circumstances may suggest or render expedient and without departing from the spirit and scope of my invention and claims.

I claim- 1. In a blow-off cock, the combination of a valve-casing having communication with a boiler and the atmosphere, a fluid-pressureactuated piston in the casing, a stem for the piston and a valve controlled by the piston and governing the passage through the casing from the boiler to the atmosphere, such valve being removably secured to the pistonstem and having a substantially universal adjustment thereon.

2. Ina blow-off cock, the combination of a valve-casing having a passage from a boiler to the atmosphere, a tluid-pressure-actuated piston in the casing, a stem therefor, a valve controlling said passage and removably connected to the piston-stem and having a movement thereon, and a removable seat on which the valve seats.

3. In a blow-off cock for a boiler and the like, the combination of a valve-casing having a passage from a boiler to the atmosphere, and formed in two parts, a fluid-pressure-actuated piston in the casing, a valve controlled by the piston and governing said passage, means for clamping the parts of the casing together, and a removable inverted cup-shaped seat within the casing on which the valve lOO los

IIO

seats, such seat being held in place by said clamping means.

fl. In a blow-oit cock for a boiler and the like, the combination of a hollow plug adapted to be secured in the blow-olf port of a boiler, a casing having a passage from the boiler to the atmosphere, a removable valveseat having an annular flange adapted to be held between the casing and plug, means for securing said parts together, a valve governing said passage and adapted to fit upon such seat and means for actuating said valve.

5. In a blow-off cock for a. boiler and the like, the combination of a hollow plug 1 adapted to be secured to the blow-off port of a boiler, a casing 2 having a passage from the boiler to the atmosphere, a removable valveseat 15 having an annular flange adapted to be held between the casing and plug, a clamping-ring 30 adapted to secure the plug, casing and annular flange together, a valve 14 governing the said passage and iitting upon said seat, a pist-011 17 having a stem 1S actuating said valve and a sprin g 27 for normally holding the valve seated.

6. A blow-oit cock comprisin ga foundationplug secured in the blow-oft port of a boiler, a valve-Casin g providing, in conjunction with the plug, a passage-way from the boiler to the atmosphere through a discharge-port in the casing, valve mechanism governing such passage-way, a removable valve-seat and a ring for clamping the plug and casing together and permitting the casing to be adjusted and secured to the plug so as to discharge to the atmosphere in any desired direction.

7. In a blow-oil' cock, the combination of a casing, a valve therein for normally closing the blow-off port and having a depending stem, means for operating the valve, and a yoke or frame connected to the casing and having a guide to receive the depending valvestem.

8. A blow-oft cock comprisinga foundationplug secured in the blow-off port of a boiler, a valve-casing providing, in conjunction with the plug, a passage-Way from the boiler to the atmosphere through a discharge-port in the casing, valve mechanism governing such passage-way, a removable valve-seat and means for clamping the plug and casing together and holding the removable valve-seat in place.

9. In a blow-oftcock for a boiler and the like, the combination of a casing communicatin g with the boiler, a valve therein for governing such communication and having an extended stem 10, a yoke 5 connected to end of the casing Within the boiler and provided with a central opening G adapted to receive and guide the stem 10 and means for actuating the valve.

10. In a blow-olf cock, the combination of a casing in two sections, one section being secured in the blow-o port, a coupling-ring for clamping or connecting the sections together,

a valve in the casing for normally closing the blow-oil? port and means for operating the valve.

11. In a blow-oft cock, the combination of a valve-casing in two sections, one being the outer section and the other the inner or foundation-plug, the casing having a passage'from the blow-oilc port to the atmosphere and also having a cylinder, a piston therein having a stem, a valve for governing said passage, means for removably securing the valve to the stem, and a second valve governing the blow-oit port and adapted to be unseated by contact with the iirst valve.

12. The combination of a valve, a stein therefor and means for removably securing the valve to the stem comprising ilanges or extensions on the valve engaging the stem, and a bolt passing through the valve and contacting the stem for retaining the valve upon the stem.

13. The means for removably securing a valve to a stem comprising a shoulder on the stem, an extension on the valve for engaging the shoulder and a bolt passing through the valve and entering the stem.

14. The means for removably securing a valve to a stem comprising an end shoulder on the stem and having a central hole or recess in its end, two substantially semicircular flanges partially encompassing the stem and engaging the end shoulder and a screwbolt passing through the valve-bod y and entering the hole in the end of the stem.

15. The means for removably securing a valve toa stem comprising an end shoulder 2O on the stem and having an end hole or rel cess, circular flanges 21 extending from vthe valve and whose inner faces are separated a distance equal to the diameter of the stem above the end shoulder and a screw-bolt 22 having a reduced end or point 23 entering the hole in the end of the stem.

16. In a blow-oft cock, the combination of a casing having a passage from the boiler to the atmosphere, a iluid-pressure-actuated piston in the casing, a stem therefor having an end shoulder, a valve controlling said passage and provided with an extension engaging the shoulder, and a screw-bolt passing through the valve-body and entering the stem.

17. In a blow-oit cock, the combination of a casing having a passage from the boiler to the atmosphere, a iiuid-pressure-actuated piston, a stem therefor having a shoulder and end recess, a valve controlling said passage and having flanges engaging the shoulder and a bolt with a reduced end, the bolt passing through the valve and entering the recess.

1S. In a blow-oit cock, the combination of a casing having a passage from a boiler to the atmosphere and also having a cylinder, a piston therein, a piston-stem integral therewith, a valve governing' the blow-od port, a second ICO IIO

IIS

valve removably connected to the stem for I9. In a blow-off cock, the combination of a valve-casing secured in a blow-olif port of a boiler and having a passage therefrom to the atmosphere, an inner valve in the casing and seated upon the blow-off port proper, means for guiding such valve, an outer valve also in the casing and governing said passage tothe atmosphere, and fluid -pressure mechanism for operating the valves and comprising a piston and a stem removably connected With the outer valve said outer valve having a substantially universal movement on its stem.

20. In a blow-off cock, the combination of a valve-casing in two sections, one being the outer section and the other the inner or foundation-plug, the casin g having a passage from the boiler to the atmosphere, and also having a cylinder, a piston located in the cylinder and having a siem, a valve removably secured to the stem and governing said passage, a second valve also governing such passage and adapted to be operated by the movement of the first valve, a yoke upon the plug Within the boiler and having a central opening and a stem upon the second valve adapted to be received by the central opening in the yoke.

21. In a blow-off cock, the combination of a valve-casing having a passage from the boiler to the atmosphere and also having a cylinder, Valve mechanism for governing said passage, fluid-pressure mechanism for actuating the valve mechanism, a removable end plate or head for the cylinder and a clampingring for securing the end plate to the casing.

22. The combination With a boiler and the like, of a foundation-plu g secured in the boiler blow-off port, a casing communicating with the plug and forming therewith a passage from the boiler to the atmosphere through a discharge opening at one side of the casing, valve mechanism Within the casing for regulating said passage and means for securing the casing upon the plug in any adjusted position.

WILLIAM MCINTOSH. Vitnesses:

M. A. BROOKS, J. F. FLEIsCHER.

Images