US1359327A - Automatic dry-pipe valve - Google Patents

Description

S. E. CAMPBELL.

AUTOMATIC DRY PIPE VALVE.

APPLICATION FILED lULY 6.1918.

3 SHEETSSHEET I.

INVENTOR c 01 ECAMP as.

A TTOR/VE Y S. E. CAMPBELL. AUTOMATIC DRY PIPE VALVE.

APPLICATION FILED JULY 6. I918. I

Patented Nov. 16, 1920.

3 SHEETS-SHEET 22 H l'i llllll ll l/VI/E/VTOR SCOTT E. CAMPBELL Illllll ww of A TTOR/VEY s. E. CAMPBELL.

AUTOMATIC DRY PI PE VALVE. APPLICATION FILED JULY 6, 1918.

1,359,327, Patented Nov. 16, 1920.

3 SHEETS-SHEET 3.

BY Ohmw -v (M,

A TTORNE Y UNITE?) STATES SCOTT E. CAMPBELL, OF LOS ANGEIEIES, CALIFORNIA.

AUTOMATIC "DRY-PIPE VALVE.

Specification of Letters Patent.

Patented Nov. 16, 1920.

Application'filed July e, 1918. Serial No. 243,573.

T all whom it may concern Be it known that I, Soo'rr E. CAMPBELL, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented certain new and useful Improvements in Automatic Dry-Pipe Valves, of which the following is a specification.

My invention relates primarily to a valve for use in automatic fire extinguisher sprinkler systems and particularly for use in systems installed in cold storage plants and the like and in very cold climates where water would be liable to freeze if left standing in the pipes of the system due to the low temperature, and the object thereof is to provide means whereby the water may be stored or retained in a standpipe or other supply system and automatically admitted to the pipes of the sprinkler system when required for use.

A. further object is to provide a valve for the above purpose which will be cheap and simple in construction and eiiicient in operation, and which can be quickly and easily reset after each operation.

While I have shown and will describe my preferred form of construction, it will be understood that I do not limit myself to the specific construction shown but that various changes and adaptations be made therein without departing from the spirit of my invention. I

I accomplish the above objects by the device described herein and illustrated in the accompanying drawings forming a part hereof, in which:

Figure 1 is a side elevation of my valve ready for use.

Fig. 2 is a central longitudinal section of my valve on an enlarged scale.

Fig. 3 is a section on the line 33 of Fig. 2.

Fig. 4: is a section on the line 4:4 of Fig. 2.

In the drawings my valve comprises a suitable casing 5, substantially rectangular in transverse cross section, closed at one side by a door 6 hinged at 7 and held closed by screws 7 or other suitable means, suitable packing being provided between the door and easing.

In the top wall of easing a little to one side of the vertical center thereof is provided a circular opening 8 surrounded by an annular flange 9, and in the upper end of this opening is mounted a vertically adjustable valve seat 10. Resting on valve seat 10 is a flap valve 11, hinged at one side of opening 8 by a hinge 12, which valve is provided with a central opening 13 and a plurality of openings li surrounding said central opening 13. Slidably mounted in opening 13 to slide Vertically is a stem 15 on the upper end of which is rigidly mounted a valve 16 adapted to close the openings 14: in valve 11 when positioned for use. Mounted upon the lower end of stem 15 is a retaining collar 17 adapted to hold stem 15 against withdrawal from opening 13. In the bottom wall of casing 5 a little to one side of its vertical center-and on the opposite side of said center from the center of the opening in the top wall is a circular opening 18 surrounded by an annular rim 19 extending upwardly a short distance into said casing, and in the upper end of said rim is mounted a valve seat 20, adjustable vertically. A flap valve 21 normally rests upon seat to close the opening therethrough, and is hinged by a hinge 22 to casing 5. Pivotally mounted at its ends in the side walls of casing 5 at each side of valve 21 is a yoke 23 which is of a size to straddle valve 21 and permit the same to v pass freely therethrough, and in the upper end of said yoke is pivotally mounted one end of a trigger 24. Pivotally mounted in bearings 25 and 26 in the side walls of casing 5 near one side and on the horizontal center thereof is a pintle bolt 27 on which is pivotally mounted a trip 28. A counter weight 29 is connected to trip 28 by an arm 30.

The lower portion of the center of pintle bolt 27 and the bearing 31 of trip 28 is out half through to form a slot 32 in which is mounted the free end of trigger 24 when positioned for use. Extending upwardly and inwardly from trip 28 near bearing 31 is a bearing 33 in which is pivotally mount ed one end of a holding lever 34:, the upper end of which is received in a recess 35 in the lower end of stem 15.

Pivotally secured at one end to the top of valve 21 is a threaded sleeve 36 in which is mounted an adjusting stud 37, which stud is adapted at its upper end to bear against the underside of trigger 24L and holds valve 21 on its seat.

In the operation of my valve the parts will be in the position shown. Compressed air will be pumped into the pipes of the system, about six inches of water being first admitted to the chamber above valve 11, water being a better seal than air. A pressure ofabout eight pounds will be maintained upon the pipes of the system, the

'fiy up and release the upper end of stud 37 whereupon the water being under pressure will force said valve 21 open and the water will then flow through valve 11 and into the pipes of the system.

When it is desired to reset the valve after use the operation will be obvious from the foregoing.

Having described my invent-ion what I claim is:

1. In an automatic dry pipe fire extinguishing system a valve therefor comprising a casing provided with an opening at each end thereof, one of said openings entering the distributing pipes. and the other opening entering the water supply pipes; a valve seat in each of saidopenings; a valve for each of said valve seats hinged at one side thereof to open upwardly;'an opening extending through said distributing valve centrally thereof; a valve for controlling said opening having a downwardly extending stem; a counterbalance pivotally mounted in said casing intermediate said first mentioned valves and being detachahly connected to the lower end of said valve stem; a yoke pivotally mounted in said casing to straddle said water supply valve; a trigger pivotally mounted at one end in the upper end of said yoke and having its free end normally engaging the under side of said counterbalance pivot; and an adjusting screw pivotally mounted at its lower end in the upper face of said water supply valve and having its free end normally engaging the under side of said trigger intermediate its ends.

2. In an automatic dry pipe fire extinguishing system a valve therefor comprising a casing having an opening at each end; a valve seat in each of said openings; a valve for each of said seats, one of said valves be ing a supply valve and the other being a distributing valve, each of said valves being hinged at one side to open upwardly; an opening extending through said distributing valve centrally thereof; a valve mounted cen rally of said distributing valve to control said last opening and having a downwardly extending stem; a counterbalance pivotally mounted in said casing intermediate said valves; a connection from one end of said counterbalance to the lower end of said valve stem adapted, when air pressure is supplied to the distributing pipes, to hold said counter balahce in its operative position; a downwardly opening yoke pivotally mounted in said casing to straddle said water supply valve; a trigger pivotally mounted at one end in the upper end of said yoke and having its other end normally engaging the under side of said counterbalance; and an adjustable stop pivotally mounted at one end centrally of said water supply valve to extend upwardly and having its'free end normally bearing against the lower face of said trigger to prevent displacement thereof.

3. In an automatic fire extinguisher system a valve therefor comprising a casing having openings at opposite ends thereof; a valve seat in each of said openings; a valve for each of said openings, one of said valves being a water supply valve and the other valve being a distributing valve; an opening in said distributing valve extending therethrough; a control valve mounted in said distributing valve cent-rally thereof to control said last opening; and means mounted in said casing intermediate said supply and distributing valves and controlled by said control valve tojrelease said water supply valve whereby water will be permitted to enter said casing;

4. In an automatic fire extinguisher system a valve therefor comprising a casing having an opening at opposite ends thereof, one of said openings being the inlet opening and the other being the outlet opening, said inlet opening connecting to a water supply and said outlet opening connecting to the distributing pipes of said system; valves mounted in said casing to normally close said openings there being one valve for each opening; a control valve mounted in said outlet valve centrally thereof; and means mounted in said casing and controlled by said control valve adapted, when released, to permit said inlet valve to open and admit water to said casing.

In witness that I claim the foregoing I I have hereunto subscribed my name this 15th day of June 1918.

SCOTT E. CAMPBELL.

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