US1318543A

US1318543A - Sprinkler-head

Info

Publication number: US1318543A
Authority: US
Publication date: 1919-10-14
Anticipated expiration: 1936-10-14

Description

E. E. CLARK.

SPRINKLER HEAD.

APPLICATION men m. Is. 19:9.

Patented Oct. 14, 1919.

\nventor Ezra E.C\Q,TK by WSMZLAQGM Attys.

THE COLUMBIA PLANonRAPu cn., WASHINGTON, n. c.

EZRA E. CL IR/K, 0E NEW 0 N' M SACHUSETTS.

Specification of Letters Patent.

Application fi ed Ja ua y 16 19.19. Serial No. 271,3?9.

To all whom it may concern: Be itknown that I, EZRA Newtonville, county of Middlesex,'State of Massachusetts, have invented anImprovement in Sprinkler-Heads, ofwhich the following description, in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts. I

This invention relates to sprinkler heads of that known type which comprises a body having a discharge port and a yoke portion carrying a valve for the discharge port, two strut members in the form of a toggle for normally holding the valve closed and each provided with an arm and a fusible link connection between said arms for maintaining normally the strut members in their operative position. 7 I

In many sprinkler heads of this type the construction is such that the stress. on the fusible link due to holding the valve to its seat is a pulling or tension stress. I It is the principal object of my present invention to provide an improved sprlnkler head of this .type which is so constructed that the stress on the fusible link will be a compression stress rather than a pulling or tension stress. As a result it is possible to employ a fusible link having a simpler construction than is required where the link.

is subjected to a pulling stress. I accomplishthis herein by so arranging the arms I In order to give an understanding of my invention, 1- have illustrated in the drawingsa selected embodiment thereof which will now be described, after which the novel features will be pointed out in the appended claims.

Figure 1 is a side view of a sprinkler head embodying my invention; Fig. 2 is a section on the line 2 2, Fig 1; Fig. 3 is a f g entary view showl g E. CLARK, a citizen of the United States, residing at extending from the toggle members that the toggle strut members with their crossing arms. F1g.4 1s a sectlon on the line H, F1g.'

1, with the fusible member omitted.

' i The body of the sprinkler head is shown at1and may have any suitable or usual construction. It is provided with the usual Patented Oct. 14, 1919.

exteriorly re aded portion 2 which is adapted to be connected to 'thewater" pipe of the sprinkler system and which is formed with the usual discharge opening 3 that is normally closed bythe valve 4. The body 1 is also shaped to present the yoke portion )5 which carries at its upper end a screw 6 having the deflector 7. The valve 4 is normally held to its seat by two

strut members

8 and 9 whichengage each other at 10 and which have a toggle action, the strut member 9 bearing against the valve 4:v and the strut member 8 bearing against the screw 6. The parts thus far described are or may be all as usual in sprinkler. heads of this ype and form no part of my present invention.

- I In sprinkler heads of this type the toggle strut members 8. and 9 are frequently provided with laterally-extendingarms which are connected by a fusible connection, the

latter normally holding the toggle members n their 'operativelposltion, 'as shown, but becoming fused and thereby liberating'the strut members Sand '9. and allowing the valve f1 to be unseated when the temperature r ses abovea predetermined point.

In my invention the strut members 8 and I 9 are provided with the arms 11' and 12,

respectively, with which a fusible link 18' cooperates to hold the strut members in their operative position. The arms 11 and 12, however, are shaped so that they have a crossed relation whereby the end 14 of the arm 11 extending from the upper "strut" fmember 8 is situated below the end 15 0f the arm 12 extending from the lower strut "member 9. The fusible link 13 is situated between theends '14: and 15 of the arms and thus normally holds the strut members in' "their operative position.

Because of the crossed relation of the arms 11 and'12, the pressure of the valve againstthe

strut members

8 and, 9 will tend 7 .05 to cause h end 14: and. 1 of the r s to" move toward each other and hence the fusible link 13 will be subjected to a compression stress.

This fusible link 13 may have any suit able construction. I have herein shown it as comprising two plates 16'a'nd 17 which are connected by suitable fusible material 18. The two

plates

16 and 17 overlap each other and the plate 17 is provided with the offset portion 19 thereby to form a shoulder against which the lower end of the plate 16 rests. The offset of this portion 19 and the manner in which the plate 16 engages it is such as to produce a leverage by which the compression stress will tend to swing the plates relative to each other about the lower edge of the plate 16 as an axis and thus separate said plates, such tendency being resisted by the fusible material 18. The upper edge ofthe plate 16 is shown'as having a notch 20 therein in which the end 15 of the arm 12 is received and the offset portion 19 of the plate 17 is also provided with a recess 21 in which the end 1 1 of the arm 11 is received. The

ends

14 and 15 of the arms 11 and 12 are also shown as having notches 22 therein in which the edges of the fusible link are received. Because of the fact that the link 13 is subjected to compression stress rather than to pulling or a tensile stress, the construction of the link is simplified. V I

Owing to the fact that the arms 11 and 12 have a crossed relation, it will follow that when the fusible linkgives way, the pressure of the valve against the toggle struts will cause the ends of the arms to move toward each other, as seen in dotted lines, Fig. 3. In order that these arms may not strike each other and thus become locked, I will preferably so arrangethem that their movement toward each other takes place in di-fierent vertical planes. The

strut members

8 and 9 are each shown as having a triangular shape, and they are arranged with their sides 10' engaging each other and with their apices engaging the screw 6 and valve 4, respectively. The sides 10 constitute the axis about which they turn when they buckle after the fusible link has given way.

Looking at Figs. 1 and 4, the arm 11 extends from the upper strut member 8 at the left-hand edge thereof while the arm 12 extends from the lower strut member 9 at the right-hand edge thereof, and both arms are bowed somewhat and are so designed that their

ends

14 and 15 are located substantially over each other, although I 1133 6 shown the end 15 of the arm 12 as situated slightly to the right of the end 14 of the arm- 11 so as to avoid any possibility of the arms striking each other when the link gives way.

By means of the construction shown the arms 11 and 12 are separated suiiiciently so that there is no danger of their becoming corroded together, thus rendering the device inoperative.

I claim:

1. Ina sprinkler head of the type having a body provided with a discharge opening, a valve for closing said opening, and toggle elements for holding the valve closed, the combination with said toggle elements, of an arm extending from each element, said arms having a crossed relation with the ends extending beyond the crossing point, and a fusible member interposed between the ends of the arms and subjected normally to a compression stress.

2. In a sprinkler head of the type having a body provided with a discharge opening,

a valve for closing said opening, and toggle elements for holding the valve closed, the combination with said toggle elements, of an arm extending from each element, said arms having a crossed relation and occupying different vertical planes, and a fusible member interposed between the ends of said arms. I

3. In a sprinkler head of the type having a body provided with a discharge opening,

a valve for closing said opening, and two toggle strut members for holding the valve closed, the combination with said strut members, of an arm extending from each member, the end of the arm extending from the lower member being situated above the end of the arm extending from the upper member, and a fusible member interposed between the ends of said arms.

I. In a sprinkler head of the type having a body provided with a discharge opening, a valve for closing said opening, and upper and lower toggle strut members for holding the valve closed, the combination with said strut members, of an arm extending from one side of the upper member, another arm extending from the opposite side of the lower member, said arms having a crossed relation so that the end of the first-named arm is situated below the end of the other arm, and a fusible member interposed between the ends of the arms.

5. In a sprinkler head of the type having a body provided with a discharge opening, a valve for closing said opening, and upper and lower toggle strut members for holding the valve closed, the combination with said strut members, of an arm extending from one side of the upper member, another arm extending from the opposite side of the lower member, said arms being bowed and having a crossed relation so that the end of the first-named arm is situated below the end of the other arm, and a fusible member interposed between the ends of said arms.

6. In a sprinkler head of the type having a body provided with a discharge opening,

a valve for closing said opening, and toggle elements for holding the valve closed, the combination with said toggle elements, of an arm extending from each element, said arms having a crossed relation, and a fusible member interposed between the ends of the arm and subjected normally to a compression stress, said member comprising two overlapping plates, one of which has a shoulder against which the edge of the other plate rests, and fusible material connecting said plates.

7 In a sprinkler head of the type having Copies of this patent may be obtained for a body provided with a discharge opening, a valve for closing said opening, and toggle elements for holding the valve closed, the combination with said toggle elements, of

an arm extending from each element, said arms having a crossed relation with the crossing point situated between the toggle elements and the ends of the arms, and a fusible member interposed between said en s.

In testimony whereof I have signed my name to this specification.

EZRA E. CLARK.

five cents each, by addressing the Commissioner of Patents,

Washington, D. 0.