US1842804A - Multiple valve - Google Patents

Description

Jan. 26, 1932.

c. STRAIN 1,842,804

MULTIPLE VALVE Filed Oct. 10; 1927 2 Sheets-Sheet 1 INVENTOR gltffozd Strain m A? am 4 ATTORNEY S Jan. 26, 1932. y c, sTRAlN 1,842,804

MULTIPLE VALVE Filed Oct. 10'. 1927 2 Sheets-Sheet 2 INVENTOR Clifford Strain Z14; Gm

4 ATTORNEYS Patented Jan. 26, 19 32 UNITED STATES PATENT OFFICE CLIFFORD STRAIN, OF JERSEY CITY, NEW JERSEY, ASSIGNOR T WALTER KIDDE Q. COMPANY, IN'G, OF NEW YORK, N..Y., A CORPORATION OF NEW YORK MULTIPLE VALVE Application fled October- 10,1927. Serial No. 225,104.

the protected s ace to the sensitive detecting apparatus. eretofore, separate valves have been used to permit delivery of the fire extinguishing medium and to prevent the detecting a aratus from being ex osed to the extinguis ing medium and their operation has been effected in successive stages to meet the above requirements. Valves have been designed which are adapted to open the fire extinguishing line and close the detecting line simultaneously in order that the proper protection may be afiorded the detecting apparatus, but there still exists the possibility of failure to close the detecting-line com- 5 pletely before opening the fire extinguishing The present invention relates to valves of this characterwherein the two operations are efiected simultaneously and more particularly deals with mechanism which is designed to-close one fluid path completely and subsequently open another, the two stages being effected in a single operation. A

An object of the invention is to provlde a valve of the above type which positively prevents the opening of one line before the comand bonnet b respectively,

plete closure of the second line is effected.

Other ob'ects will appear as the description procee sin connection with the accompanying drawings wherein:

Figure 1 is a view in section, showing the assembled valve structure with the gas valve seated and the air valve unseated.

Figure 2 is a view in section, showing both valves seatedl Figure 3 is a view in section, showing the gas valve unseated and the air valve seated.

Referring particularly to Figure 1, a indicates the main valve bod provided with a bonnet-b. Flanges a an 6', upon body a are secured towardly extending arms gether by means of bolts 0. J uxtaposed circumferential recesses 11 and b in t e flanges 'a and b, respectively, are provided to receive a removable valve seat d, described more specifically hereinafter. This valve seat serves to prevent the fire extinguishing medium or gas, which is admitted through a port a" in the bonnet b, from entering the main body of the valve when the gas valve en ages t ereagainst.

t the head of the valve body a, a seat a is formed about a passage a which permits the interior of the valve body a to communicate with a chamber at provlded with a port a to which is connected the smoke detecting apparatus. A port a provides communication between the interior. of the valve body a and the roomwhich is to be protected from fire by admission of the fire extinguishing medium or gas.

A valve stem e, provided with a hand wheel e, extends within the valve body and has inned to it threaded bushings e and 6 the ormer engaging threads a in the head of the valve body a, and the latter engaging a threaded bushing f. A suitable cap a may be threaded over theend of the valve body in a well lmown manner, and a washer (1 is secured to the end of the valve stem by means of nuts a The removable seat at is (provided with upprovided with flat surfaces 11 These fiat surfaces are engaged by flat surfaces f upon the movable bushing f and serve to prevent rotation of the bushing while it is permitted to move in an axial direction. The bushings e and e are provided with threads havin the same direction of rotation and the lea of the thread on bushing e is twice that of the thread on the bushing e, that is, the bushing c has a a so-called double thread and bushing e a single tread. If the hand wheel 6' is rotated in the proper direction, the valve stem 6 will advance toward the left into the valve body, and since the lead of the thread on the bushing e is twice that of the thread on the bushing e the bushin 7 will travel along the valve stem 6 twice as ar as the valve stem enters the thread which engages the of spring k bushing e'. As the valve stem is not stationary, but advances toward the left, the bushing 7 will not move twice as far, with respect to upon the bushing f by means of a circumferential flange f This bonnet g carries a valve body g provided with a valve disc 9 and a valve spring 9 engaging the bushing f, urges the valve body g to the right. A second bonnet It carries a valve body it, which is provided with a valve disc k A spring it normally urges the valve body it to the right and causes it to engage the remova plurality of ports, separate valves for conable seat 03. This closing action, of course, supplements the closing force normally exerted by the valve stem e through nuts a and a, upon valve'body h. The valve structure last described controls the flow of extinguishing medium from the supply port a in the valve bonnet I), through the valve body a and out the port a The operation of the device is as follows: In its normal position the gas valve h, h if is tight against the seat d and the air valve 9, g g is open. This condition is shown in igure 1. As the valve stem 6 is advanced into the valve body, the bushing 7 moves to the right, causing the air valve to engage the seat u As the valve is seated, the spring 9 is compressed to cause it to seat tightly.

This condition is illustrated in Figure 2. In the continued movement of thevalve stem,the bushing 6 moving to the left with the valve stem, finally engages the valve disc 72. which is maintained in a seated position by means Continued movement of the valve stem e unseats this gas valve and permits the flow of the medium through the port a. Figure 3 illustrates this position of the as valve. The parts are designed to provide or suflicientlost motion between the bushing 6 and the valve 71. to enable the valve disc 9 to engage the seat a tightly before the valve disc h is moved from the seat d. It will be seen, therefore, that this structure positively closes the valve which communicates with the detecting mechanism before the gas valve is opened to introduce the fire extinguishing medium into the chamber with which the detecting mechanism communicates. In connection with the operation defined above, it will be apparent that the force of the spring h is supplemented by theforce exertedb the extin ishing med" um within the'valve nnet b. t would be JOS- sible to dispense with the valve spring 72 and utilize the pressure of the extinguishing me dium to exert the necessary closing force upon the valve body 72.. In connection with the operation defined above it will be apparent that, in the reverse operation, the gas valve is closed before the air valve opens.

v No limitation upon the scope of this invention is to be imposed by reason of the above description, since the elements can be rearranged and designed to meet various needs. I claim as my invention: 1. A valve comprising a valve body having a plurality of ports, separate valves for controlling the fluid flow through the ports, a unitary valve stem carried in the valve body for mounting the valves and means operated by the stem to cause one of the valves to be operated more rapidly than another to effect the closure thereof and place one of the ports in communication with another port to the exclusion of a third.

2. A valve comprising a valve body having trolling the fluid flow through the ports, a valve stem carried in the valve body, a bushing secured to the. stem and engaging the valve body to cause the stem to be moved axially when rotated, a second bushing, means to operate one of the valves from .the second bushing and means to operate another of the valves after a predetermined movement of the stem.

3. A valve comprising a valve body having a plurality of ports, separate valves for controlling the fluid flow through the ports, a valve stem carried in the valve body, a bushing secured .to the stem and{ engaging the valve body to cause the stem to be moved axially when rotated, a second bushing, and means to operate one of the valves from the second bushing, said second bushing operating another of the valves after a predeter- 1 mined movement of the stem.

4. A valve comprising a valve body having a plurality of ports, separate valves for controlling the fluid flow through the ports, a valve stem carried in the valve body, a bushing secured to the stem and engaging the valve body to cause the stem to be moved axially when rotated, a second bushing, means to operate one of the valves from the second bushing and means to operate another of the valves after the first valve has been seated.

' 5. A valve comprising a valve body having aplurality of ports, separate valves for controlling the fluid flow through the ports, a valve stem carried in the valve body, a bushing secured to the stem and engaging the valve body to cause the stem to be moved axially when rotated, a second bushing, means to cause one of the valves to be closed and urged under a yielding pressure against its seat and means to open another of the valves after the closing pressure of the first valve has reached a predetermined amount.

6. A valve comprising a valve body having a plurality of ports, separate valves for.

valve stem carried in the valve body, a bushing'secured to the stem and engaging the valve body to cause the stem to be moved axially when rotated, a second bushing secured to the stem, and a bushing operated by the second bushing to close one of the valves, said second bushing opening another of the valves after the first valve has been closed.

7 A valve comprising a valve body having a plurality ofports, separate valves for-controlling the fluid flow through the ports, a valve stem carried in the valve body, a bushing secured to the stem and engaging the valve body to cause the stem to be moved axially when rotated, a second bushing secured to the stem, a bushing operated by the second bushing to close one of the valves, and means to move the last bushing in an opposite direction to the valve stem to close one of the valves, said second bushing opening another of the valves after the first valve has been closed.

8. A valve comprising a valve body having a plurality of ports, separate valves for controlling the fluid flow through the ports, a valve stem carried in the valve body, a bushing secured to the stem and engaging the ing a plurality of. ports, contro a valve stem carried in the valve ing secured to the stem and engaging the va v valve body to cause the stem to be moved axially when rotated, a-second bushing secured to the stem, a bushing operated'by the second bushing to close one of the valves, and means to move the last bushing in an opposite direction to the valve stem with a speed equal-thereto to close one of the valves, said second bushing opening another of the valves after the first valve has been closed.

9. A valve comprising a valve body having 'a plurality of ports, separate valvesfor controlling the fluid flow through the ports, a valve stem carried in the valve body, a bushing secured to the stem and engagin the valve body to cause the stem to be moved axially when rotated, a second bushing secured to the-stem, a bushiu threaded u on the second bushing, flat sur aces on the aste body to cause the stem to be moved axially when rotated, a second bushing .se-'

cured to the stem, a bushing, a double thread mounting the latter upon the second bushing,

fiat surfaces on the last bushing, flat surfaces carried by the valve body and engaged by the flat surfaces on the bushing to constrain the latter to axial movements, and means 0perated by the last bushing to close one of the valves, said second bushing opening another of the valves after the first valve has been closed.

- 11. A valve comprising a valve body having a plurality of ports, separate valves for controlling the .fluid flow through the ports, a valve stem carried iii the valve body, a bushing secured to the stem andengaging the valve body to cause the stem to be moved axially when rotated, a second bushing secured to the stem, a valve bonnet engaged by the last bushing, a valve operated by the bonnet, a spring engaging the last bushing and urging the valve upon its seat, said second bushing opening another of the valves after the first valve is closed, and a spring to resist the operation of the second valve by the second bushing.

12. A valve comprising a valve body having a plurality of ports, separate valves for controlling the fluid flow through the ports, a removable seat carried by the valve body, a single means to cause one of the valves to disengage the seat and to operate another of the valves, and means carried by the seat cooperating with the last named means to effect the operation thereof.

ing a plurality of ports, separate valves for controlling the fluid flow through the ports, a valve stem carried in the valve body, a

bushing secured to the stem and engaging the valve body to cause the stem to be moved axially when rotated, a second bushing secured to t e stem, a bushing threaded upon the second bushing, flat surfaces on the last bushing, a removable seat carried by the casing, flat surfaces formed on the removable seat and engaged by the flat surfaces on the bushing to constrain thelatter to axial movements, and means operated by the last bushing to close one of the valves, said second bushing opening another of the valves after the first valve has been closed.

13. A valve comprising a valve body hav- 14. A valve comprising a valve body, a

bonnet therefor, a port in the bonnet, ports in the body, a valve controlling the communication between the last two ports, a removable seat'carried between the body and the bonnet, a valve engaging the removable seat, means to cause one ofthe valves to be unseated after the other has been seated, and means carried by the seat cooperating with the last named means to effect the operation thereof. V

This s ecification signed this 4th day of October D. 1927.

-- CLIFFORD STRAIN.

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