US1415677A

US1415677A - Sprinkler head

Info

Publication number: US1415677A
Application number: US316577A
Authority: US
Inventors: Adelbert F Mowry
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-08-11
Filing date: 1919-08-11
Publication date: 1922-05-09
Anticipated expiration: 1939-05-09

Description

A. F. MOWRY.

SPRINKLER HEAD.

APPLICATION FILED AUG- H, 1919.

1,415,677. te M y 9,1922.

barren star rarsarorri ADELBERT r. MownY, or woncnsrnn, MASSACHUSETTS;

SPRINKLER HEAD.

Application filed August 11, 1919.

To all whom it mag concern:

Be it known that I, ADEL ERT F MOWRY,

the operation thereof may be rendered more with the frame 12 rising therefrom and efficient and competent. With this object in view the invention consists in the automatic sprinkler head hereinafter described and particularly defined in the claims. In the drawing illustrating the preferred embodiment of the invention Figure 1 represents an elevation of the improved automatic sprinkler head showing in section the improved fusible joint; Fig. 2 is a'perspective of the strut contrivanc e' or retaining device; itllcl Fig. 3 is'a sectiono-n the line 33 of ig. 1. I 1

The automaticsprinkler head, illustrated in the drawing, is described as follows i The nozzle 10 isprovided with acap or closure 11 constituting the, ordinary cap thereof and forming part thereof. -The improved heat responsive st-rut contrivance or retaining device is interposed between the frame 12 and cap 11 and comprises a V-shaped member or two-armed bell crank lever 14 and a. link member 15.' The members 14 and 15- are arranged as illustrated in- F ig. 1 in which one arm 16 of the V-shaped member 14 serves as a strut orcompression member to hold'one end of the link member 15 against an abutment'sc'rew20 in the frame 12. o The end of the screw seatsin-a depression 21 in the top surface of one end of the link meme ber 15. The link member 15 is provided with a hook 24 at its outer end adapted to slip over and engage the second or flexural arm 17 of the V-shaped member 14. The link member 15 comprises two

separate por tions

25 and 26 which are provided with

tapered holes

30, 31 arranged to be opposite each other when the two members 25. 26 are placed in their operative position. The portion 25 is provided on each side with an Specification of Letters Patent. I

Patented May 9, 1922. Serial No. 316,577.

portion or flange 27 (see'Fig. 2) to afford a large fusible material contact area. The fusible joint or connection is provided by filling the opposing

tapered holes

30, 31 with fusible material so as to form a fusible rivet ble material over the end of the portion 26 out onto the flanges 27. A shoulder33 is extended from the surface of the. member 25 and serves to assist in positioning the'members 25, 26'so as to bring the

tapered holes

30, 31 into alignment when the holes are to be filled with fusible material.

enlarged By reference to Fig. 1, it is'seen that the Y compression arm 16 of the V- shape'd member 14 is ofl'set'from the axial line passing through the center of the cap 11 from the center of the screw 20 so that water pressure exerted upon the cap 11 operates through the arm 16 to tendto rotate the link member 15 about the point of contact'of the screw '20 therewith. The tendency of'the 32, and by extending the 'fusitension member 15 to rotate in this manner is resisted'by the engagement of the hook 24 with the end of the arm 17 of the V-shaped member 5 14. Upon consideration of the forces exerted upon the structure, it is apparent thatthe

individual portions

25, 26 of the link member 15 are subjectedto ten 81011 as well as" fiexural' stresses tending to pull the member 26 downwardly and to rotate the member 25 upwardly. The,struc ture is rigidly maintained by the fusible rivet 32 and the adhesion of the fusible material to the flange 27 of the member25. 7

When the temperature of the room reaches the softening point of the fusible material, the water pressure exerted upon the cap 11 is transmitted to the link member 15 in the above described manner {and operates to cause the portion 25 of the member 15 to be moved slightly upwardly, the portion 26 being restrained from movement by the engagement of thehook 24 with the end of the arm 17. The continued movement of the portion '25 operates to shear the fused or I softened rivet 32so that the

portions

25 and 26 are immediately expelled in divergent directions thus releasing the water'from the nozzle. As the member 25 is wardly about its point of contact with the rotated upscrew 20, the member 26 is rotated about the 7 also moved in divergent directloris whereby the chances of resetting the fusible material are eliminated.

Experience with previous constructions has shown the necessity for the individual elements of the structure to be made substantial enough to withstand the continuous application of considerable water pressure without distortion or yielding in any way. In order to accomplish this result, it will be observed that both the V-shaped member 14 and the

individual portions

25, 26 of the link member 15 are of sufficientstrength to withstand all degrees of pressure which they are likely to be subjected to. It has also been found in practice that the successful operation of automatic sprinkler heads depends to considerable extent upon the construction and design of the fusible joint. It is recognized that with the lapse of time, the adhesion of fusible material to the surfaces of the members deteriorates so that if reliance is placed solely upon the adhesion, the joint will gradually weaken until finally the device operates to release the water from the nozzle. Also the adhesion of one material to another is sometimes destroyed by sudden shock or jar. The present construction of improved fusible joint aims to prevent all difficulties which have arisen in practice with all other types of joints. The fusible matcrial in the

tapered holes

30, 31 forms a double headed rivet so that the joint not only successfully resists the tendency of one member to slide upon another and thus shear the joint, but the opposing tapers also resist any tendency of the

members

25, 26 to move away from one another. In order to reenforce the fusible rivet a considerable mass of fusible material envelops the head of the rivet and is secured by adhesion to the flanged portions 27.

An important feature of the invention resides in its simplicity and practicability.

\Vhile the preferred embodiment of the invention has been illustrated and described, it is to be understood that the same may be embodied in other forms within the scope of the following claims 1. An automatic sprinkler head having, in combination, a nozzle having a frame, a cap adapted to close the nozzle, a two-mem ber heat responsive device interposed between the cap and frame consisting of a triangular structure, two legs of the tri angular structure being formed bv a V- shaped two armed member and the third leg by a single member cooperating with the ends of the arms of said two armed 1nemv her, said heat responsive device having provision whereby one leg of the triangular structure is subjected to a direct tensile stress in the direction of its length, and a fusible joint in said leg.

2. An automatic sprinkler head having, in combination, a nozzle having a frame, a cap adapted to close the nozzle, a two-member heat responsive device interposed between the cap and frame consisting of a triangular structure, one leg of the triangu lar structure serving as a direct compression strut, the second leg being formed 7 integrally therewith and extended at an angle therefrom and the third leg being formed by a single member cooperating with the ends of the other two legs, said heat responsive device having provision whereby one leg of the triangular structure is subjected to direct tensile stress in the direction of its length, and a fusible joint in said leg.

3. An automatic sprinkler head having,

in combination, a nozzle having a frame, a

cap adapted to close the nozzle, a two-member heat responsive device interposed between the cap and frame consisting of a triangular shaped structure, two legs of the triangular structure being formed by aV- shaped two armed member and the third leg by a single member, one end of the latter being hooked over the end of one arm ,of the two armed member, said single member being subjected to tension in the direction of its length, and a fusible. joint in said single member.

4-. An automatic sprinkler head having, in combination, a nozzle having a frame, a cap adapted to close the nozzle, and a two-member heat responsive device interposed between the cap and the frame consisting of a triangular structure formed by a V-shaped two armed member having arms of substantially equal length, one of which is arranged to serve as a direct compression member, and a lever provided with a fusible joint, one end of said lever being hooked over the end of the second arm of the two armed lever and the other end being interposed between the end of the first arm of the two armed member and the frame, the point of contact of the first arm of the two armed member and said lever being arranged to lie outside of the center line between the cap and the frame. I I ADELBERT F. MOVVRY.