US956733A - Strut for automatic sprinklers. - Google Patents

Description

G. I. ROGKWOOD.

STRUT FOR AUTOMATIC SPRINKLERS. APPLICATION rrmm DEC. 11, 1908.

956,733. Patented May 3,1910.

[Mine-556,3 4

GEORGE I. BOOKWOOD, 0F WOMEBTEB, MASSACHUSETTS.

B'IIU'I FOR AUTOMATIC BPBINKLEBS.

Specification of Letters Patent.

Patented May 3, 1910.

Application filed December 11, 1908. Serial No. 487,015.

To all whom it. may concern:

Be it known that I, Gnonon I. Roonwoon, a citizen of the United States, residing at Worcester, in the county of Worcester and Commonwealth of Massachusetts, have 1nvented a new and useful Improvement m Struts for Automatic Spnnklers, of wh ch the following is a specification, accompanied by drawings forming a part of the same, m which Figure 1 is a top view of my improved strut. Fi 2 is a longitudinal sect-Ion on line 2--2,%ig. 1. Fig. 3 is a transverse section on line 3-3, Fig. I, and Flg. 4 1s a slde View on a reduced scale of an automatic sprinkler, showing my improved strut in position.

Similar reference figures refer to similar parts in the different views.

My present invention relates to a brace or strut for an automatic sprinkler, comprising two pieces held together by fusible material and arranged to separate at a predetermined degree of heat, and has for one ofits objects to provide means for preventing the separation of said pieces before the pre determined degree of heat has been reached, and it consists in the construction and arrangement of parts as hereinafter descnbed and pointed out in the annexed claims.

Referring to the accompanying drawm s, 1 and 2 denote the separable pieces of t e strut, arranged to form a part of an automatic sprinkler, as shown 1n Fig. 4, with the end 3 of the piece 1 arranged to engage one end of a horizontal lever 4;, and with the end 5 of the piece 2 arranged to engage a shoulder 6 of a vertical post 7, the other end of which post 7 forms a fulcrum for the lever 4 as shown in Fi 4. This arrangement of post, strut and ever is well known in automatic sprinklers and forms no part of my invention. The pieces 1 and 2 of the strut are held with their surfaces 8 and 9 in contact, by means of a block of fuslble material 10 in contact with the end 11 of the piece 1 and with the surface 9 of the piece .2. Embedded in the fusible material is astaple 12, having a ortion 18 parallel with and transverse to tl ie surface 9. At either end of the ortion 13 of the staple 12 arms 14 exten toward the surface 9, and, passing throu h openin s 15 in the end 5 of the piece 2 are out into looks 16, engaging the surface 17 of the piece 2.

The staple 12 is of relatively non-fusible material, and in the operation of the device forms a secure attachment of the block 10 to the surface 9 of the piece 5, as long as the fusible material remains intact and preserves its stillness. Inasmuch as the strain upon the strut is in a direction tending to separate the end 11 from the surface 9, and is resisted by the block 10 in contact with the end 11 and attached to the surface 9 by the staple 12, as long as the block 10 is unaffected by the temperature, the separation of the end 11 from the surface 9 is prevented. As soonas the degree of heat required to melt the block 10 is reached, the block 10 no longer ofiers resistance to the end 11 in its movement of separation from the surface 9, and it is no longer held in firm contact with the surface 9 bythe staple 12, and the end 11 quickly flies away from the surface 9. It is, therefore, immaterial with regard to the separation of the pieces 1 and 2 whether the surfaces 8 and 9 are united by fusible material or not; the pleces cannot separate until the proper degrce of heat to fuse the block 10 is reached, when the fusible solder would also he melted. The strut is thereby completely held from separating by the block 10 alone before said predetermined do w ree of heat is reached. In no case is the ad esive quality of the solder, or of any fusible material composmg the block 10, relied upon to prevent the separation of the pieces 1 and 2, but the SUEHGSS or strength of the material 10 alone holds the end 11 of the piece 1 in contact with the surface 9 of the plece 2, and the end 11 not released until the resistim quality of the block 10 is destroyed by tlie rising temperature. When this happens, either the connection by the sta )le 12 with the piece 2 is loosened, so as to re ease the end 11, or the shape of the block 10 is otherwise changed by the force tendin to separate the end 11 and the piece 2, wit the same result.

I claim,

1. A brace for an automatic sprinkler, comprising members arranged to separate by a rocking movement of one member around the end of the other member. but held from such separation by a block of fusible material attached to the fulcrum member by a. nunfnsiblc means of attachment beyond the swinging end of the rocking member, said block of fusible material arranged to iuclose said swinging end.

2. A brace for an automatic sprinkler,

sa in bl meanslof a,, ach

' b and a e A a ng and '9fi. h .mk r%m mbenie1P "ttheseparation of sat members, sa d onfiisible"*means arranged beyond said winging=gend i n, order to exert no direct f6 e ng s fm vem nt11*,

i3.-A brace "tor an iautom t1c,. sprmkler, comprising separate members barmg surfaces incontact and arranged to separate by a rocking movement of-on'e gmember around theend of the other member, a blockof fuel bleginaterialcapable of being softened-by a predetermineddc 'ththe' outer si e. of the 'swmgmgendof "-ssaid rockin member oppositev to sald contactin snr aces andnonfusible means of lattachln'g saidblock to said fulcrum member beyond said swinging end.-

' i=4. Ajbrace for an automatic sprinkler, comprising 'members. arranged to be sep- 'arated by-strain upon said brace, a block of l filsiblematerial" arranged to contact with the outer sideof the swinging member, and asta 1e. ofnonfusible materlal inclosed 1n said' lock with its ends attached to the stationary member.

,5. A brace for an automatic sprinkler comprising separate members havm surfaces in contact arallel with the 1me of v ,;,"strain upon said race, a block of fuslble material in contact with the contacting surface of one member and arranged to contact with the outer side of the other member parallel with said contacting surfaces, and a mamas-setw th, th

es of heat in contact stablec,f nonfusible material passing be through. said block with its 'ends attached to said first member.

6.. A, brace ior'an automatlc sn-inkler, comprxsln members arranged to e sepaigated byte strain on said brace, but held from such separation by a block of fusible material arranged to contact with'the outer side of one member and attached to the other member by nonfusible means, said nonfusible means entirely inclosed in said fusible block, whereby said nonfusible means is protected from corrosion.

7 A brace for an automatic 5 rinklcr, com risinl members arranged toe separate by t e strainon said brace, but held fromsuch separationby a block of fusible material arranged to contact with the outer side of the end of one member andattached to the plane surface of the other member beyond said end "by nonfusible means, said means entirely embedded in said block to prevent corrosion.

8. A brace for an automatic sprinkler, comprisin members arranged to be separated by t estrain on said brace, but held from such separation by a block of fusible material attached to the plane'snrface of one member by nonfusible means of attachment approximately corresponding in width to sald member, said block inclosing the end of the other member and a proximately semiglobular in shape to inc ose said means of attachment.

GEORGE I. ROGKWOOD.

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