US687817A

US687817A - Safety and vacuum valve for expansion-pipes.

Info

Publication number: US687817A
Authority: US
Inventors: Charles C Connell
Original assignee: HAYDENVILLE Co
Current assignee: HAYDENVILLE Co
Priority date: 1901-03-19
Filing date: 1901-03-19
Publication date: 1901-12-03
Anticipated expiration: 1918-12-03

Description

No. 687,8I7. Patented Dec. 3, |90.

c. c. cuNNELL. I SAFETY AND VACUUM VALVE FOR EXPANSION PIPES.

(Application led Mar. 19, 1901.1

f 2 Sheets-Sheet I..

(N0 Model.)

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Patented Dec. 3, I90l.

No. 687,8i7.

C. C. CNNELL.

SAFETY AND VACUUM VALVE FOR EXPANSION PIPES.

(Application led Mar. 19, 1901.)

2 Sheets-Sheet 2.

(No Model.)

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I compartmentshell, provision also being made A'UNITED STATES PATENT Ormes,

CHARLES C. CONNELL, OE HAYDENVILLE, MASSACHUSETTS, ASSIGNOR TO HAYDENVILLE COMPANY, OF HAYDENVILLE, MASSACHUSETTS, A COR PORATION.

SAFETY AND VACUUM VALVE FOR EXPANSION-PIPES.

SPECIFICATION forming part of Letters Patent N o. 687,817, dated December 3, 1901.

Application filed March 19, 1901.

To 4ci/,ZZ whom it may concern:

Beit known that I, CHARLES C. CONNELL, a citizen of the United States, residing at Haydenville, in the county of Hampshire .and

5 State of Massachusetts, have invented a new and useful Safety and Vacuum Valve for Expansion-Pipes, of which the following is a specification. t

My invention relates to a device for pre- 1o venting the exploding or collapse of househeating and range hot-Water boilers particularly; and it consists, essentially, of a perforated flexible diaphragm having a valve attached thereto and an auxiliary valve in a bifor a 'water seal in this construction; and the objects of my improvement are, first, to provide against the loss of hot water and against undue pressure in the boiler and possible exzo plosion resulting from steam generated suddenly or quickly from any cause; second, to relieve any vacuum that may occur, and thus prevent collapse of said boiler, as when the water from the main supply is suddenly withdrawn, and, third, to vent the boiler in the absence of pressure therein, thereby insuring free delivery of Water being drawn from the same, as well as affording an opportunity for all air, whether hot or cold, to escape, and obviating the liability of said air being held back or forced into any crook, S connection, or delivery-pipe to interfere with the proper Working of the apparatus or system. My device is useful, too, in connection with the cold- Water supply for a house, as it removes the danger of pipes bursting and prevents serious water-ha1nmer. I attain these objects by the mechanism illustrated in the accompanying drawings, in which*c 4o V Figure 1 is a side elevation of a hot-water boiler equipped with my automatic safety and vacuum valve; Fig. 2, an enlarged sidefview of said valve; Fig. 3,`a vertical section through the latter; Fig. 4, a top view of the rubber diaphragm; Fig. 5, an enlarged interior view of the shell looking into the same from below, and Fig. 6 an enlarged interior view of the base-piece looking into the same from above.

Serial No. 51,884. (No model.)

Similar figu res refer to sim ilar parts throughout the several views.

M y invention is shown mounted on a hot water boiler 7 at the top of the expansionpipe '8 in Fig. 1, said boiler having the circulating-pipes 9 and 10 extending therefrom. The boiler 7" receives its supply of water from either the street-main 11 or the tank 12, into which said main opens, through the pipe 13. The high-pressure and vacuum safety device is preferably attached to the expansion-pipe at the top of the boiler, but may of course be attached' to a eold-water-supply expansionpipe. The valve-shell 14 has the threaded top 14, into which the fulcrum -hub 15 is screwed. The hub 15 is equipped with the ordinary ears 15, to which the safety-valve lever 16 is pivoted at 17, and with the guide l5b for said lever. The lever 17 is notched as usual and provided with the weight or ball 1S. 4

A tight joint is formed between the shell 14 and the fulcrum-hub 15 by means of vthe metallic washer 19 and the diaphragm 20, of rubber or other flexible material, the latter being held firmly between the spindle 2l and the valve-stem 22, which screws onto the threaded spindlefshank 21, passing't-hrough said diaphragm into said stem. The washer 19 and the diaphragm 2O are held tightly between adjacent surfaces of the shell 14 and the hub 15. The spindle 21 rises through an opening in the hub 15 to receive the lever 16. v The valve 23, preferably of rubber, is attached to the base of the stem 22 by the winged guide 24, which has the threaded shank 24 to pass through said valve and screw into said base.

The shell 14 is divided into the two compartments or

chambers

25 and 26 by walls in which are the

vertical openings

27 and 28, one above the other, said openings being surrounded by the valve-seats 27a and 28, respectively. The projection 14" extends from one side of the shell 14 for a vent or waste pipe connection and opens into the chamber 95 25. The ehambered base-piece 29 is screwed into the threaded lower end of the shell 14, tight against the outer edges of the flexible and force the valve 33 against its seat 32.

diaphragm 30 and the metallic washer 3l. On the interior of the base-piece 29 is the vertical ridge 29, forming a channel with the surrounding wall for a. water seal. The lower end of the base-piece 2f) is threaded to screw intothe expansion-pipe S. The winged guide 32 has the threaded shank 32 extending through openings in the valve 33, the metallic washer 3l, the diaphragm 30, and the metallic dome 35, and the nut 36 is screwed onto the bottom of said shank to bind these parts tightly together. The

winged guides

24 and 32 operate in the

openings

27 and 28, respectively, which latter are grooved to receive the registering projections or wings of said guides and retain their attached valves constantly in proper position relative to the

seats

27 and 28a. The grooves in the wall about the opening 2S for the reception of the wings of the guide 32 are bestshown in Fig. 5, in which the guide itself is also indicated by dotted lines. The wall about the opening 27 is grooved in a similar manner.

The valve 33 is preferably of rubber and adapted to bear against the seat 28th The diaphragm 30 is also preferably of rubber, and should be of greater diameter than the peripheral bearing for the same in orderto allow for considerable movement on the part of said diaphragm. Said diaphragm is provided with a series of holes 30, somewhat remote from the edge thereof. Thedome 35 is shaped like a shallow cup inverted,"with its edges in the water-seal channel. The 0bject of the water seal is to condense the steam that arises, and thereby prevent deleterious action on the rubber parts in the interior of the device.

It will now be readily understood that any undue pressure that may accumulate for any reason, such as an increase caused by the sudden lowering of the water in the boiler, and consequent rapid formation of steam, or the lessened demand for water at night must elevate the dome 35, with the diaphragm 30, In the same manner the loss of hot water forced out of the expansion-pipe into the base-piece 29 by the inflow of cold water is prevented; otherwise the water would escape through the diaphragm holes 30, the chamber 26, the opening 28, the chamber 25, and the passage in the projection 14:1. After the valve 33 is closed the pressure accumulates in the chamber 26, entering through the holes 30' until of sufficient force to raise the auxiliary valve 23 from its seat and escape through the opening 27, the chamber 25, and the passage in the projection 14th, thus obviating any tendency toward an explosion. On the other hand, the withdrawal of pressure in the chamber of the base-piece 29 allows the diaphragm 30 to drop and carry the valve 33 away from its seat, so that air can enter by way of the passage in the projection 14h, the chamber 25, the opening 2S, the chamber 26, and the holes 30L to preventthe formation of a vacuum and remove the liability of collapse. Iiugs 38 prevent the lower edge of the cup-shaped piece 35 from entirely closing the opening. Four (more or less) of these lugs are arranged on the bottom of the channel formed by the wall of the base-piece 29 and the ridge 29, as will be clearly seen upon reference to Fig. 6. The holes in the diaphragm 30 are large enough for the passage of air, but not so large as to admit a sullicientv quantity of water to pass through to interfere with the elevation of said diaphragm and the proper closing of the valve 33. The winged guides 24 and 32 do not fill the openings in which they operate sufficiently to interfere with the adequate passage of the elements through said openings.

What I claim as my invention, and desire to secure by Letters Patent, is-

l. In combination with a chambered shell having a valve-opening, a flexible diaphragm having holes between its center and circumference and connected with a valve, interposed between the chamber in said shell and an expansion-pipe connection.

2. In combination with a chambered shell having a valve-opening, a chambered basepiece, and a flexible diaphragm having holes between its center and circumference, connected with a valve and interposed between the chambers in said shell and base-piece.

3. In combination, a bicompartment-shell having two valve-openings, a perforated flexible diaphragm interposed between one of the compartments in said shell and an expansionpipe connection, a valve connected with said diaphragm and adapted to close one of said valve-openings, and an auxiliary valve adapted to close the other of said valve-openings.

4. In combination with arange or'water system for buildings supplied from a street-main or lank,a shell mounted on an expansion-pipe, and a flexible diaphragm secured by its edges in said shell, said diaphragmhaving holes between its center and circumference and provided with a central valve adapted to close a valve-opening when under pressure.

5. In combination with a range or water system for buildings supplied from a street-main or tank,ashell mounted on an expansion-pipe, a perforated flexible diaphragm secured by its edges in said shell, said diaphragm provided with a central valve adapted to close a valve-opening when under pressure, and an auxiliary safety-valve normally closing a second valve-opening.

6. In combination with a chamber-ed shell having a valve-opening, a chambered bases piece provided with a water-seal channel, a perforated flexible diaphragm connected with a valve and interposed between the chambers in said shell and base-piece, and a dome attached below said diaphragm and movable therewith, a portion of said dome extending into said water-seal channel, substantially as set forth.

7. In combination with a range or water system for buildings supplied from a 'street' IIO main or tank, a shell mounted on an expansion-pipe and provided with a water seal channel, a perforated flexible diaphragm secured by its edges in said shell and provided with a valve and a dome depending into said water seal channel, said valve adapted to close a valve-opening when under pressure, substantially as set forth.

8. In combination, a bicompartment-shell having two valveopenings,a chambered basepiece provided with a water-seal channel, a perforated flexible diaphragm interposed between one of the compartments in said shell and the base-piece chamber, a valve connected with said diaphragm and adapted to close one of said valve-openings, a dome attached below said diaphragm and movable therewith, a portion of said dome extending into said water-seal channel,and an auxiliary valve adapted to close the other of said valveopenings, substantially as set forth.

9. In combination with a range or water system for buildings supplied from a streetmain or tank, a shell mounted on an expansion-pipe and provided with a water-seal channel, a perforated flexible diaphragm secured by its edges in said shell and provided with a valve and a dome depending into said water-seal channel, said valve adapted to close a valve-opening when under pressure, and an auxiliary safetyvalve normally closing a second valve-opening, substantially as set forth.

10. The combination, of a bicompartmentshell having a vent or waste pipe opening leading from one of the shell-compartments, a chambered base-piece, two valve-openings between the shell-compartments, valves for said openings, a weighted lever to normally control one of said valves and a perforated exible diaphragm to normally control the other, substantially as set forth.

11. In combination with a chambered shell having a fulcrum-hub mounted thereon, and a weighted lever pivoted to said hub, a flexible diaphragm held by adjacent surfaces of 13. In combination with a chambered shellv having a valve-opening with grooved. walls, a valve provided with a winged guide adapted to register with the valve-opening grooves and reciprocate therein, substantiallyl as described.

14. In combination with a valve mechanism, a flexible diaphragm held firmly by its edges and slack in the center, capable of intermediate movement, and a valve connected therewith, said diaphragm having holes through the same between its center and circumference, substantially as shown.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

Y CHARLES C. CONNELL.

Witnesses:

WILLIAM G. LooMIs, CARL B. MARTIN.