US1623887A - Automatic sprinkler - Google Patents

Description

G. F. NEWTON AUTOMATIC SPRINKLER April 5, 1927. 1,623,887

4 Filed March 16, 1925 25 1 15 7 16 17 Fi 2 t 7 Patented Apr. 5, 1927.

PATENT orrica.

GEORGE FREDERICK NEWTON, OF PROVIDENCE, BHODE ISLAND, ASSIGNOB TO UNITED STATES FIRE PROTECTION COMPANY, OF PBOVIDEHCE, RHODE ISLAND, A COB- PORATION OF RHODE ISLAND.

' Aeronautic alumnae.

Application filed larch 18, 1825. Serial No. 15,959.

My invention has reference to an improves ment in fire extinguishing devicesrand more particularly to an improvement in automatic sprinklers, as used in automatic sprinkler systems. g

The object of my invention is to improve the construction and operation of automatic sprinklers and my invention pertains more particularly to that form of automatic sprinklers nown as lever sprinklers.

Further objects of. my invention are to reduce the cost of construction and improve the operation of automatic lever sprinklers thereby producing an automatic sprinkler that is more positively looked under normal,

non-fire conditions and more quickly released under fire conditions, than has heretofore been done.

My invention consists in the peculiar and novel construction of an automatic lever sprinkler, said sprinkler having details of construction, as will be more fully set forth hereinafter and claimed.

Figure l is a side view of my improved automatic lever sprinkler, showing my improved adjustable deflector, in section.

Figure 2 is an edge view of Figure 1 and showing a face view of my improved fusible link.

Figure 3 is a central transverse sectional view through the cover of the valve head.

Figure 4 is a central transverse sectional view through the body of the valve head and showing the cover and springs in their normal positions, in broken lines.

Figure 5 is a side view of the cone shaped spiral sprin of the valve head.

Figure 6 1s a central transverse sectional vievg through the spring washer of the valve hea Figure 7 is a face view of the fusible link member of the sprinkler.

Figure 8 is a central sectional view of the fusible link member, taken on line 8, 8, of

Figure 7 Figure 9 is a sectional view, similar to Figure 8, of a modified form of fusible link member.

Figure 10 is a central detail sectional view of the central position of Figure 8, and

Figure'll'is a faceview of the semi-circular retaining members, as used in the modified form of fusible links, shown in Figure 9.

Figu s 4, 7, 8, 9 and 11, swellto more clearly show my invention.

larged and Figure 10, still further enlarged,

In the drawing, 1 indicates the body of an automatic sprinkler having a screw- -threaded tubular shank 2, 3 a yoke with a valve seat 4 and arms 5, 5, curving to a hub 6. A screw 7 is screw-threaded through the hub 6 and has the usual recessed inner end 8.

9 indicates my improved valve head which' shown in full and broken lines in Figure 4, I

and held in place, in their contracted positions,by the coverll, when the valve head is on the valve seat 4, in the sprinkler.

15 indicates my improved adjustable defiector which consists of a body member'16 in the form of a flat disk having a screwthreaded periphery 17 and a central screwthreaded hole 18, whereby the body member 16 is secured to the sprinkler by screwing it onto the screw 7, against the hub 6. A rim 19 having a series of bent fingers 20, 20, is screw-threaded onto the screw-threaded periphery 17, of the body member 16, thereby completing the deflector, as shown in Figure 1. By turning the rim 19 on the body member 16, the rim, which is the water spreading part of the deflector, is adjusted towards or away from the stream ofwater, thereby compensating for different water pressures. A

Intermediate the hub 6 and the valve head 9 are levers 21 and 22, each lever having a hook shaped outer end 23. These levers have the usual inner end construction'to engage with the screw 7, the valve head 9 and off center with each other, as shown in Figure 1.

24 indicates my improved fusible link member of the sprinkler. This fusible link member 24 is circular in form and consists of an outer disk 25 having a raised inclined annular ed e 26, a hook hole 27, for the hook end 23 o the lever 21, a hook slot 28, for the hook end 23 of the lever 22, a central hole 29 in which is a small tube 30, which acts as a disk separating element. At each side of and on a central line with the central hole 29 are depressions 31 and 32. In the I depression 31 are two small rolls 33, 33, and in the depression 32 are two small ofi' center toggle joint members 34, 34, and extending around the depressions is a concentric raised annular rib 35. Soldered centrally to the back of the disk is a sunken washer 36 the central hole in the washer 36 coinciding with the hole through the tube 30. An inner disk 37 is constructed to have an annular groove 38 for the annular rib and a l soldered washer 36, otherwise the construction is the same as the outerdisk 25. This inner disk 37 fits into the outer disk 25 and the small central tube 30, is smaller than the central holes 29, 29, in the disks. All of the 2 parts of the fusible link are secured in place and the entire inner surfaces of the two disks are secured together by solder 39, as

shown in Figure 8.

In the modified form, shown in Figure 9, 25 the outer disk 25 has an annular groove 40, corresponding to the annular groove 38 in the inner disk 37, thereby forming a round annular bore 41, in which are soldered two semi-circular wire retaining members 42, 42,

30 shown in Figure 11.

, By this construction all of the parts of the fusible link member are strongly secured together, thereby producing a fusible link member that will stand an extremely high 5 water pressure and that is also extremely sensitive under fire conditions. The raised inclined annular edges 26, the annular rib 35, the rolls 33, 33, the central tube 30, and the toggle joint members 34, 34, under fire 40 melting conditions, will quickly force the disks apart, thereby eliminating slow creeping of the disks. The spring action of the valve head 9 operates to compensate for expansion and contraction of the frame of the 4 sprinkler and also assists in a quick operation of the sprinkler. In the modified form of fusible link, shown in Figure 9. the wire retaining members 42, 42, also assist in forcing the disks apart when the solder melts. \Vhen under fire conditions the solder 39 melts, the pressure of the water on the valve liead 9 and the levers 21 and 22 will cause T the parts of the fusible link to fall apart and the parts of the valve head and the levers to separate and fall out of the sprinkler and the water will pass unobstructed to the deflector 15 from which it is distributed onto the fire.

Inpractice I find that the central tube 30, lyingras it does crosswise of the two disks,

agtsj) firmly hold the disks against creeping of the disks and it also acts to quickly force the disks apart under fire melting conditions. and that this sprinkler will stand '55 an extremely strong water pressure without leaking and at the same time is extremely sensitive in operation under fire conditions.

Having thus described my invention I claim as new 1. In an automatic sprinkler, a fusible link member in the form of an outer and an inner disk. each disk having a central hole,. a tube soldered to the disks in the central holes. the inner disk having a circular groove and the outer disk having a circular rib sol dered in the circular groove, each disk having coinciding inclined annular peripheries soldered together, and means for securing the fusible link to the levers of an automatic sprinkler.

2. In an automatic sprinkler, a fusible link member consisting of outer and inner disks soldered together, each disk having a central hole, a tube soldered to the disks in the central holes, a sunken washer soldered centrally to each disk, means forming a cavity between the disks, toggle joint members soldered to the disks in the cavity, an annular groove in one disk, an annular-rib on the other disk and soldered in the annular groove, each disk having inclined coinciding annular peripheries soldered together and means for securing the fusible link member in its operative position in an automatic sprinkler.

3. In an automatic sprinkler, a valve head in the form of a roundshallow box, saidvalve head having a body member with a central stud, a cover having a central tubular stud which goes over the central stud in the body member and forms a guide for the cover to hold the cover in place, a spring washer in the body member, a cone shaped spiral spring in the body member and means for holding the valve head in its operative position on the valve seat of an automatic sprinkler, for the purpose as described.

4. In an automatic sprinkler, a valve head in the form of a round shallow box, said valve head having a body member with a central stud. a cover having a central tubular stud which fits over the central stud in the body member, a spring member in the body member, a sprial spring in the body member, said spiral spring being cone shaped when not under spring tension, said central stud in the body member, guiding centrally the spiral spring and the spring member into the body member and also guiding centrally, the cover onto the body member.

5. A fusible link member for automatic sprinklers, said link member consistin of two plates soldered together, the lates aving central coinciding cylindrical holes, on an axial line with the plates, a tubular plate separating member in'said holes and contacting with both plates, said tubular plate separating member extending crosswise of the plates and on a line with the axis of the plates and'members on the plates over the ends of the tubular plate separating member.

6. In an automatic sprinkler, a dish shaped deflector formed of inner and outer parts, said inner part being disk shaped and form ing the bottom of the deflector and having a screw-threaded periphery and said outer .part being in the form of an inclined rim having a series of bent peripheral fingers andscrew-threads Ill screw-threaded engagement with the screw-threaded periphery of In testimony wvhereof, I have signed my name to this specification.

GEORGE FREDERICK NEWTON.

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