US1294360A - Vacuum vapor damper-regulator. - Google Patents

Description

vc. METCALF.. VACUUM VAPOR DAMPERV REGULATOR.

4 APPLICATION F'ILED- MAY 21,1917.

1,294,360. j Patented Feb. 11, 1919.

TED

lemen;

yCHAIR'II'EIS METCALF, OF STREATOR, ILLINOIS.

VACUUM VAPOR DAMPER-REGULATOR.

Application led May 21, 1917.

To all whom t may concern:

Be it known that I, CHARLES Marc/ALF, a citizen of the United States, resldlng at Streator, in the county of La Salle and State of Illinois, have invented a certain new and useful Improvement in Vacuum Vapor Damper-Regulators, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to improvements in vacuum vapor damper regulators.

In connection with vacuum heating systems, it is now customary to employ a regulator having a bellows-controlled member for actuating the damper proper, the .1nterior of the bellows being in communication with the heating system so that the bellows contracts and expands in accordance with variations in the vapor pressure of the system. Heretofore, so far as I am aware, no means have been provided for limiting the amount of contraction of the bellows (which are ordinarily made of thin sheet metal) with the result that when eXtreme vacuum occurs in the system, the bellows are contracted to such an extent as to collapse and render them useless.

The object of my invention is to provide a damper regulator of the type above referred to wherein means are employed for positively limiting the degree of contraction of the bellows regardless of the degree of vacuum in the heating system, to thus protect and save the bellows with a consequent saving in the cost of repairs and replacements.

Another and more specific object of the invention is to provide a regulator of the type hereinbefore referred to wherein is employed a check or relief valve for the purpose of equalizing the pressure in the system with that in the bellows as the pressure within the system rises to a point where the damper regulator is set to operate.

Another object of the invention is to provide a regulator of the type set forth in the two preceding paragraphs which shall be of simple construction, relatively cheap to manufacture, and which can be installed with a minimum of effort.

In the drawing forming a part of this specification, is shown a central, vertical, sectional view of an improved regulator embodying my invention.

Specication of Letters Eatent.

Patented Feb. 1i, 1919.

serial No. 169,859.

In said drawing, 10 denotes a sheet metal bellows of usual form, the same being secured at its lower end to a base casting 11 having a depending interiorly threaded bushing 12. Threaded within .the bushing l2 is the upper end of a nipple section 13, the lower end of said nipple section 13V being threaded as indicated at 14 and adapted to be screwed into a boiler or other portion of a vacuum heating system to thereby place the interior of the bellows in communication with the vapor system. The nipple section 13, preferably near the lower end thereof, is provided on its interior with a conical valve seat 15 with which is adapted to coperate what may be termed a main valve 16, said main valve 16 being carried by a hollow tube 17 that extends through the enlargement 18 which and the upper end of the tube 17 is secured the upper plate 23 of the bellows 10.

From the preceding description, it will be seen that when the pressure within the heating system falls below atmosphere, the Hexible sheet metal bellows 10 will contract,

thus lowering the member Q0 and the upper plate 23 of the bellows. This contraction will continue until the main valve 16 becomes seated on the valve seat 15 and the amount of permissible contraction can be regulated as desired by properly locating the valve 16 with respect to the valve seat 15, in normal position of the parts. After the valve 16 is seated, it is apparent that no further contraction is permitted even though the pressure within the system may be lowered to a still greater extent and in this way, the bellows are effectively prevented from severe contraction and consequent destruction. Y Y

As the pressure within the system again rises, it is necessary to equalize the pressure of the system as a whole with the pressure within the bellows and for this purpose, l have provided a ball check or relief valve :2d which is adapted to coperate with an- Y other valve seat 25 formed on a perforated partition 26 within the tube 17. At the upper end of the tube 17, are provided openy ings 27 which communicate with the interior of the bellows so that, as the pressure rises within the System 'to a point where the damper regulator is set to operate, the check valve 24 will be raised, thus equalizing the pressure and then permitting the main valve 16 to be opened and placingy the regulator in proper operation.

flrom the preceding descriptiom'it will beissen that the regulator which I have provided is of simple construction and positive in its operation, eiiectively preventing collapsey or destruction of the bellows regardless of 'thedegree of vacuum which may occur yin the heating system.

Although .I lhave herein 'shown and described what I now consider the preferred embodiment of my invention, the same is merelyillustrative, vand `I contemplate all changes `and inod'iiications that come within the scope 'of `thesclaims appended hereto.

I claim: Y 1. In a regulator of the character described, fthe combination with a bellows adapted to be employed with a ,vacuum heatingsystenrand have its interior placed 'in communication with said system, of a valve seat, amain valve cooperable with said seat and operated bythe contraction and eXpansion yof the bellows, said valve when seated shutting-oil"y communication between the interior :of the bellows and the heating system, andareliet-valve associated with said main valve.

Q.' In a regulator of Vthe character described, `the Vcombination with a bellows adapted to befemployed with a vacuum heatingsystem and fhave its interior placed in communicationwith said system, of a valve seat, a'valve coperable with said seat and, when in closed position, shutting ot coinmunicationfrom the interior of thebellows with the heating system, and a member Yattached to and movable in unison with a portion yof the bellows iby which ksaid valve is carried, v said `valve, when seated, thereby limiting the contraction of the bellows.

3. In ya regulator of the characterV deu scribed, the combination with a bellows adapted tofbe .employed with a vacuum heating' system and have its interior placed in communication with said system, of a valve seat, a valve'zooperable with-said seat and, when in closed position, shutting olif communication from the interior of the bellows with the heating system, a member attached to and' movable in unison with a portion of the bellows .by which said valve is carried, said valve, when seated, thereby limiti-ng the contraction of the bellows, and a check valve carried by said member.

l. In .a regulator ot the character described, the combination with a bellows carried by a pipe member adapted to be attached to a heating system to thereby place Y the interior of the bellows in communication with vsaid system, saidY bellows having atop wall, ot' a valve seat located within said pipe member, a depending rod extending from the inner surface of said top wall'of Vside of the top Vwall of said bellows ldown within lthe pipe member, "said hollow tube being provided with a main yvalveadapted to cooperate with said valveseat, a check valve located within said tube, said tube being provided'with an opening tabove the check valve to permit communication between the interior of vthe tube abo-ve the valve and the interior of the bellows.

6. In a regulator fof the character described, the combination with a bellows adapted to be employed with a vacuum heating system and have its :interior placed in communication withl said system, of a -main valve seat, a main valve coperable with said seat and adapted, when uthe valve is seated, to shutoff communication between the interior of the bellows and the heating system, and an auxiliary check valve'governing communicationV with `the interior of said bellows and adapted to 'break the vacuum therein.

In witness that I claim the foregoing I have hereunto subscribed my name this '8rd day ol May, 1917.

CHARLES 'METCALI lllitnesses EDGAR H. WERNER, Emir, PHILLIPS.

Copies of this patent may be obtained for live-,cents each, by addressing the Commissioner oiPatents,

' Washington, D. C.

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