US1603358A - Self-acting temperature regulator - Google Patents

Description

Oct. 19 1926. 1,603,358

D. D. ROSENBURGH SELF ACTING TEMPERATURE REGULATOR Filed June 22, 1920 2 Sheets-Sheet 1 INVENTOR BY j is ATTORNEY 0. 0. ROSENBURGH SELF ACTING TEMPERATURE REGULATOR Filed June 22, 1920 2 Sheets-Sheet 2 Hum W rarnnr ID'U'RWOOD D. ROSENB'URGH, OF ROCHESTER, NEW YORK, ASIGNOR T0 TAYLOR, IN-

;STRUIVIENT COMPANIES, OF ROCHESTER, NEW YORK, A CORPOBATIUN' OF NEW YORK.

SELF-A(l"l.l Il IG TEMPERATURE REGULATOR.

Application filed June 22, 1920. Serial No. 390,888.

perature or pressure which is sensitive, free.

from chatter and which acts to move the valve through the medium ofthe pressure to v7 be controlled.

To these and other ends the invention consists in certain improvements and combinations of parts, all as will be hereinafter more fully described, the novel features bcing pointed out in the claims at the end of the specification. 7

In the drawings: v y V Figure 1 shows the unitary casing containing the controlling means connected with the temperature responsive bulb through armored tubing.

Figure 2 is a section on the line 2 2 of Figure 1..

Figure 8 is a view similar to Figure 1 except that the main valve is shown in open position.

Figure at is a side view partially in sec tion of the valve and easing of Figure 1.

Eiimilar reference numerals throughout the several views indicate the same parts.

For purposes of illustration my invention has been embodied in an automatic main valve controlled by an auxiliary or pilot valve which is automatically responsive to the temperature to be controlled and ac tuates the main valve to govern the flow of a heating medium.

As shown in the drawings a main valve 1 of a fluid supply main or conduit having inlet and outlet passages 2 and 3 respectively, is provided with a tapered or beveled seat 4; in order that the pressure of the inlet or supply side may assist in seating the valve, and cooperates with a compression spring 5 located between the casing and the top oi the valve for the purpose of serving as an additional means tending to seat the valve. A stem 6 connected to the lower part of the valve serves as a guide means for the valve in its movement and at the same time raises the valve when the piston or other fluid pressure mechanism located in cylinder 7 below the main Valve rises and cooperates with said stein. The'piston is of considerably larger area than the main valve andis provided with an upper and lower portion, 9 and 8 respectively serving to prevent chatter, the upper "portion 9 be mg loosely fitting within the cylinder yet capable of fcooperation with the cylinder walls to form a dashpot. Joining the inlet.

space just above the valve with the cylinder 1sa bypass 10 extending outside the casing, around the valve, and leading into the cylinder 7 in the space 12 between the. portions 8 and 9 of the piston. In order that the piston may always be responsive to pressure in the by-pass 10, a passageway 11 is located in the piston joining'its lower side orpressure end with the space 12 between the upperand lower portions of the piston and enabling the fluid pressure in the bypass 10 to act upon the lower side of the piston to raise the same and open the valve 1. Another-passageway 13 is provided be tween the upper end of the cylinder and the outlet side of the valve which allows the pressure in the cylinder 7 to be equalized with that on the outlet side of the valve since the piston is somewhat loosely fitting withdown upon its seat by the actuating stem 15 closes the passageway 10., An expansible capsular diaphragm 16 of substantially heavy material cooperates with the stem 15 i to close the valve when the diaphragm expands a predetermined amount. No spring orv other force, except the resiliency of its sides opposes the expansion of the diaphragm and the internal volume or space between the diaphragm plates when in contracted position should be relatively small. A capillary tube 17, shown in the drawing as being provided with a protecting armoring, leads to a source of pressure or when the device is used as a temperature responsive means to a bulb 18 which is partially filled with a volatile liquid, preferably ether, to readily expand with variations in temperature oi the bulb. The air in the bulb, capillary tube and diaphragm is first eX- haustcd and the bulb is then partially filled with the volatile liquid, of which said bulb preferably contains more than enough to fill the diaphragm and capillary, but less than justable but non-rotatable relative to the.

casin by the adjusting nut 20 which is rotatab e thereon and may be provided with a pointer 21 cooperating with suitable graduations 22 on the exterior of the casing for the purpose of indicating the position of adjustment of the diaphragm. A single casing 23 encloses the diaphragm, pilot valve, main valve, and piston and dash pot in the preferred arrangement shown by the drawings.

In operation the main valve 1 is normally closed but when the pressure on the inlet side increases the pilot valve 14 opens and allows the pressure to be transmitted through the bypass 10 into the space 12 between the upper and lower portions of the piston and through the passageway 11 to the under side of the piston where it is effective in raising the piston which cooperates with the stem 6 and the main valve to open the same against the action of the spring 5. \Vhen the locus Whose temperature is to be regulated and in which the bulb 18 is placed reaches a predetermined temperature, the volatile liquid within the tube has its vapor tension increased to such an amount that the diaphragm 16 expands moving the stem side of the valve.

15 downwardly and closing the auxiliary or pilot valve 14 which in turn closes the passageway 10 and since the piston is loose- 1y fitting in the cylinder 7 the pressure below the piston soon becomes equalized with that on the outlet side of the valve when the piston drops and the spring 5 together with the pressure on the inlet side of the valve is effectve in moving said valve into closed position on its seat, thereby shutting off the flow of the heating medium.

Among the advantages of my invention may be enumerated the tact that while the diaphragm and pilot valve have a small degree of movement, the diaphragm as arranged and the large area of piston 8 etfectively secure sensitive operation of the main valve responsive to the temperature to be controlled. The provision of the upper and lower portions 8 and 9 on the piston steadies it and prevents it and its cooperating devices from having the obiectionable chatter found in other devices. The use of the spring 5 together with the beveled seat enables the main valve 1 to be positively and securely closed under the combined action of the spring and the pressure on the inlet In operation the main valve, by reason of the character of the controlling devices described. does not open or close with each slight fluctuation of temperature but steadily assumes the proper mosses position which furnishes the required steam pressure. By having the internal volume of the diaphragm relatively small and the bulb partially'filled to the extent indicated,

the heating of the diaphragm 16 to a higher temperature than that of the bulb 18 does not prevent the bulb 18 from accurately indicating the temperature since the bulb 18 will always contain the free surface of the volatile liquid which is eflective in governing the pressure or vapor tension in the diaphragm and capillary. The use of the particular form of adjusting means for the diaphragm is of merit because there is no tendency for the diaphragm chamber or its connections to be twisted during its adjustment by the adjusting nut 20.

I claim as my invention:

1. The combination with a fluid supply conduit ot a main valve therefor, a piston and cylinder of larger area than said main valve for moving the same, said piston comprising spaced upper and lower portions one of which cooperates with the end of the cylinder to form a dashpot, a passageway from said conduit to said cylinder and an automatic controlling valve in said passage way.

2. The combination with a fluid supply conduit, of a main valve therefor, a piston and cylinder of larger area than said main valve for moving the same, said piston comprising spaced upper and lower portions, one of which is loosely fitting within the cylinder yet capable of cooperation with said cylinder to function as a dashpot said other portion having a passageway therethrough andsaid cylinder having therein a vent for said dashpot, a passageway from said conduit to said cylinder and an automatic controlling valve for said passageway.

3. A self-contained regulating device comprising a fluid conduit, a main valve having a casing for connection in said conduit, an extension on said casing having a cylinder formed therein, a piston movable in said cylinder and having a connection with said main valve for moving the same, a second extension on said casing formed with a second conduit connecting said first conduit and cylinder, a pilot valve for said second conduit, and a capsular diaphragm for operating said pilot valve said diaphragm being housed in said second casing extension.

4. In a fluid regulating device, the combination with a fluid conduit, of a main valve therein, a fluid pressure responsive mecha nism for moving said main valve, a passage wav leading from said conduit to said pressure mechanism, a control valve in said passagewav. a relatively heavy expansible capsular diaphragm of relatively small volume operativelv connected with said control valve to move the same, a source of fluid pressure connected with said diaphragm, a casing enclosing said main valve, pressure mechanism, control valve and diaphragm, and means for limiting, theexpansion of said diaphragm said means being adjustable exteriorly 0 the casing, the sole substantial and yieldable force opposing the expansion of said diaphragm being that due to its resiliency.

5. The combination with a fluid conduit of a main valve therefor, a fluid pressure mechanism for moving said main valve, a passageway from said conduit to said fluid pressure mechanism, a pilot valve in said passageway, an expansible capsular diaphragm in cooperation with said. pilot valve, a source of fluid pressure connected with said diaphragm,'a casing for said diaphragm and adjusting means for limitingnthe expansion of said diaphragm relative to said casing, said means'comprising a nonrotatable sleeve slidable in said casing and an ad- ]ustmg nut in cooperation with sald sleeve.

6. The combination with a fluid conduit *of a main valve therein, a cylinder and piston adapted to cooperate with said main valve, said piston being of larger area than said main valve and comprising spaced upper and lower portions, one of which is loosely fitting in said cylinder but is adapted to coact with said cylinder to form a dashpot, a passageway joining saidconduit and said cylinder to transmit the operative pressure for said piston, a pilot valve in said passageway, a relatively heavy expansible capsular diaphragm adapted to move said pilot valve on expansion, a bulb partially filled with a volatile liquid, a tube joining said bulb and diaphragm, a casing enclosing said main valve, piston, pilot valve and diaphragm, said passageway extending outside said casing, and means adjustable exteriorly of said casing for limiting the expansion of said diaphragm.

DURWOOD D. ROSENBURGH.

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