US1066973A - Protective device for fluid systems. - Google Patents

Description

R. A ANDRE-sun PROTECTIVE DEVICE FS'R FLUID SYSTEMS.

APPLICATION FILED I'BB. 16, 1910.

1,066,973. Patented July.8,1913.

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UNITED sira'rns PA orrrcn.

ROBERT ANDERSON. 0F NEWARK, NEW JERSEY.

ERO'IECTIVE DEVICE FOR FLUID SYSTEMS.

Specification of Letters Yatent.

1 Aippiibation filed February 16, 1510. Serial No. 544,175.

, excess of pressure in the fluid contained therein, and is designed more particularly to protect; water meters or other receptacles from the effects of the freezing of their contents.

In the accompanying drawings, which form a partof. this specification, Fi ural is a view p ly in elevation and'partly in section illustrating a portion of a water motor, a pipe leading thereto and one of my protective devices applied to the pi e; Fig. 2 is affragme-ntury sectional view i1 ustrating a modification of my device; and Fig. 3- is a sectional view of a modified form of bulb.

Referring to the drawings in detail, the numeral 1 designates the meter or other device or receptacle which it is desired to protect. 2 is a pipe leading thereto, which contains a T 3. VVit-h the side outlet 4 of the T I connect my protective device 5. The latter may be constructed in a. variety of ways, but I prefer to form the same of a plug or nipple 6 having an externally screwthreaded end 7 which may be screwed into the outlet 4 of the T, and an internally threaded cylindrical portion 8 provided with a seat 9 for the reception of a packing ring 10. The packing ring may be of rubber or other suitable material, and is held .in place by a plug or gland member 11, provided with a flange 12 at its outer end.- The plug 11 and packing ring 10 are perforated to receive the tubular neck 13 of the bulb 14,

which forms an essential feature of my invention. The inner end of the neck 13 is contracted as indicated at 15' to provide a seat for engagement with the packing ring 10, the latter being sutticiently resilient to permit the enlarged end 16 of the bulb neck to l)C forced therethrough and to contract into the groove formed by the contracted portion-of the neck, thus serving to retain the bulb in position. The bulb is open at its inner end and is ih connection withthe water-pipe 2. through the opening 17 in the P atiented J u'ly 8,1851%:

nipple. The. bulb may bemade of 'any niittcrial which will break or stretch under the influence of excessive pressure within the same, and thus relieve the pressure in the pipe and meter 1 to an-extent sufficient to prevent dama e thereto. I prefer tom'ake' the bulb 14 0- less or other frangible indterial, so'that it will burst and ermit free outflow of the water contained t new; In

order to protect the bulb from injury from external sources, I preferably cover the same with a. cap 20. having an in-turned flange 21, which engages beneath the flange 12 ofthe plu ll. In order that this ca may not-impel e the expansion of the fttiid after thebreaking of the bulb, I may provide it with one or more vents or outlets 22. I

In Fig. 2 I have shown a-modification of my device in which the bulb I4 is contained within a cap 25 similar to t-hecap 20,'b1t t; without a vent. The cap in this case will serve to prevent the leakage of the fluid.

upon the breaking of the bulb In order,

however. to permit the bulb to serve function and allow expansion of the con tained tluid, I make the cap 25 off-considerably greater volume than that of the bull) or of the cap shown in 'Fig. 1. Thus, when the bulb bursts the pressure within the sys term will be greatly relieved and will not rise again to an appreciable extent until the cap 25 is nearly filled. Under ordinary circumstances the volume of the cap will be sutlicient to permit an ample expansion of the fluid in the system. i

In Fig. 3 I have shown a modified form of bulb which I may use with my apparatus,

this bulb being formed of a flexible material, 7

preferably a soft metal such as lead. The bulb 30 in this case is formed Wlth a reentrant portion 31, which upon the rise of 7 pressure Within the bulb will be forced out into the position indicated in dotted lines. If the increase in volume due to this distenburst.

It will be seen from the above description that I have provided, in order to allow for a certain expansion or rise in pressure of the fluids in a fluid system, a device acting to provide for an increase in the volume of the contained fluid, which at the same time permits a decrease in the pressure in the system and does not rely for its operation upon the continued increase of pressure in the systern, as in certain devices usirigsprings or air 1 1:. tion of the bulb is insufficient, the latter will 7 7 cushions, the use of which has been heretofore suggested. My bulbs, by breaking, act positively to permit a free expansion of the fluid in the system, their breaking being at the same time no disadvantage, as their cost is negligible and they maybe replaced without ditliculty.

Having thus described certain modifications of my invention, but without limiting myself to the specitic structures described and shown, I claim:

1. In combination, a. fluid system and a protective device therefor including a glass container, in con'nnunication with said system, having a pressure resisti e strength substantially less than that of the remainder of the systei'n, and a fluid-tight compart-. ment surrounding said container.

2. A fluid system, and a protective device therefor, said device including a relatively frangible container in communication with said system, and means for separably connet-tin; said container to said system, vincluding a tap member adapted to be inserted in some part of said system, a gland membersurrounding said container, means for detachably securing said gland member to said tapniember, and means for: forming a fluidtight connection between said container and said tap member.

3. A fluid system, and a protective device therefor, said device including a relatively frangible container in communication with, said system, and means for separably conneeting said container to said system, including a tap member adapted to be insert.-

ed in some part of said system, aigland member surrounding said container, means for detachably securing said gland member to said tap member, means for forming a fluid-tight; connection between said container and tap member, and a fluid-tight shield surrounding said container.

4. A fluid system, and a protective device therefor, said device including a relatively frangible container in communication with said system, and means for separably connectmg said container to the system, 1ncludmg a tap member adapted to be inserted n some part of said system and having,- an ill-*- ternally threaded portion, a gland memixzr surrounding, said container and having an externally threaded portion adapted to fit said tap member, and means for forming a fluid-tight connection-between said con-- rounding said container, and having an externall y threaded portion adapted to fit. said tap member, and means for forming a tlnid tight. connection between said container and tap member.

1 ROBERT ANDERSON.

Witnesses:

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