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Патент USA US3080010

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March 5, 1963 `
Filed July 19, 1961
4 14”@
i -4 »F30
ltd diaree
Patented Mar. 5, 1953
It should, of course, be understood that the description
and drawings herein are illustrative merely, and that
Fred A. Gloeclder, Philadelphia, Pa., assigner to Star
Sprinkler Corporation, Philadelphia, Pa., a corporation
of New .îersey
Filed July 19, 1961, Ser. No. 125,224
5 Claims. (Cl. 169-41)
This invention relates to sprinklers, and more particu
larly to sprinklers of the dry pendant type.
in my prior application for Letters Patent, filed July 17,
1959, Serial No. 827,783, now Patent No. 3,007,528
there is shown a sprinkler of the dry pendant type in
various modifications and changes can be made in the
structure without departing from the spirit of the
Referring now more particularly to the drawings, a
preferred form of dry pendant sprinkler is illustrated as
mounted in an opening 5 in a ceiling 6 of a character
where minimum exposure is desired although the sprinkler
is not limited to this particular type of mounting. The
sprinkler includes a conductor tube 1l) of any preferred
material, such as brass or other material resistant to
corrosive action of the extinguishing iluid and to atmos
pheric exposure. The length of the tube lil will be
which an improved character of valve for isolating the
iiuid is retained in closed condition in a simple but effec 15 determined by the requirements of the particular
tive manner until it is desired to release the same.
The tube 10, at the upper end thereof, is provided with
ln accordance with the present invention, a dry pendant
an inlet nozzle l1 having a cylindrical side wall portion
sprinkler is provided of related type, but in which an
l2 in close fitting engagement with the exterior wall of
improved and simplified construction is provided for
the tube 1li and held in fixed relation with respect thereto
retaining the valve member in closed condition and for
by a plurality of nozzle locking pins 13.
controlling the release of the same.
The inlet nozzle 11 has a main -bore 14 extending
It is the principal object of the present invention to pro
upwardly from the upper end of the tube 10 and pref
vide a dry pendant sprinkler of simple but effective con
erably of smaller diameter than the interior diameter of
struction which is suited for use in unheated areas and
the tube le.
the like, and which has an improved character of fluid
The inlet nozzle ll, at the upper end of the bore 14,
retention and discharge control.
has an inclined shoulder l5 extending to an intermediate
lt is a further object of the present invention to provide
bore 16 of smaller diameter than the bore 14. The inter
a sprinkler assembly of the dry pendant type having
mediate rbore 16 terminates at a transverse shoulder 17
an improved character of valve control structure in which
the valv is maintained in closed condition independent 30 from which an end bore 18 of still further reduced diam
eter extends to the upper terminal end of the nozzle 11.
of the assembly tension stress imposed in the sprinkler
lt is a further object of the present invention to provide
The bores 14, 16 and 18 are in vertical longitudinal axial
The inlet nozzle 11 is externally threaded as at 19 for
an improved character of valve control structure such 35 attachment to a supply oi lire extinguishing ñuid and the
nozzle l1 is preferably placed at a location free from
that the temperature responsive elements can be assem«
any tendency of freezing.
bled, set and tension tested as a separate entity prior
A valve member 20 is provided, preferably in the
to installation in the system.
form of a piston of smaller diameter than the diameter of
lt is a further object of the present invention to provide
a sprinkler assembly of the dry pendant type having a 40 the bore 18, and has an annular groove 21 therein for the
reception of a packing ring 22, preferably an O-ring, for
closure which does not require the application of any
engagement with the bore i8 and preventing fluid leakage
seating pressure thereon, and which is not subject to the
a sprinkler assembly of the dry pendant type having
downwardly past the valve piston 2G when it is in the
position as illustrated in FIG. 1. The valve piston 2t)
also is provided with an annular groove 23 with beveled
lt is a further object of the present invention to provide
ends 24 for the reception of a plurality of retaining balls
an automatic sprinkler component or" the dry pendant
25 which normally, while in engagement in the groove
type having an improved construction for controlling the
23, are retained against upward movement by the abut
retention and release of the valve and thereby isolating
ment against the shoulder 17, and are restrained against
the iluid controlled by the valve until the same is released
50 radial outward movement by the bore 16.
for discharge.
Within the tube ld, at the lower end thereof, a sprinkler
lt is a further object of the present invention to provide
bushing 23 is provided and held in position with respect
an improved sprinkler component of the dry pendant
to the tube lil *by a plurality of pins 29 extending through
type having a valve for controlling the delivery of lire
the tube lil and into engagement with the bushing 28.
extinguishing fluid in which an improved character of
Within the interior of the tube 16, a support tube 3i)
support is provided for retaining the lvalve in closed
is provided having an upper inwardly beveled terminal
position, but which is capable of release by temperature
imposition of stresses from the temperature responsive
element employed therewith.
end 3l, and a lower section 32 of reduced diameter to
conform to the internal diameter of the bushing, the
lt is a further obiect of the present invention to provide
shoulder 33 at the upper end of the lower section 32
a sprinkler of the dry pendant type in which the con
stituent parts are simple in construction yet reliable in 60 serving as an abutment upon engagement with the upper
face 34 of the bushing 2%.
Within the lower end of the bushing Zâ, and in engage
- ther objects and advantageous features of the inven
ment with the lower end of the support tube 30, a control
tion will be apparent from the description and claims.
sleeve 35 is provided of predetermined length and has
The nature and characteristic features of the invention
an outwardly extending iìange 36 for engagement with the
will be more readily understood from the following
underface of the sprinkler bushing 23. The sleeve 35 is
description, taken in connection with the accompanying
responsive components of known type.
drawings forming part t’ ereof, in which:
FIGURE 1 is a vertical central sectional view of a
preferred form of dry pendant sprinkler in accordance
with the present invention; and
FIG. 2 is a horizontal sectional view taken approxi
mately on the line 2_2 of FlG. l.
preferably made of relatively soft material to facilitate
seating of the ñange 36. A drain opening 37 can be
provided in the support tube 3l). The temperature re
sponsive element of the sprinkler can be any desired
type, one suitable construction being that shown in U.S.
Patent No. 2,664,956. This construction includes an
open frame-'38 integral with Íthe bushing 28 and having
the interior of the support tube 3i) and is discharged down
alboss 39 through which a threaded adjusting stemr40
wardly, and upon striking the distributing plate 44, is
extends. The stem 40 has an end socket 41 for engage
ment with a rounded projection 42 on a supporting disc
43. >The stern 40 `'has a distributing plate 44 secured
manner customary with sprinklers.
It will be noted that the valve piston 20, when in en
sprayed and sprinkled over a substantial area in the
>thereto which also `serves for manually turning the stem
et) upon assembly. The disc 43 has an excess itempera
’ture responsive -strut 45 mounted thereon with a socket
.and .uponremoval of the support .thereof .permits 'llui’d
46 within which low melting point material (not shown)
gagement with the bore 1S, provides with its sealing
ring 22 afñuid `tight closure preventing fluid leakage
-is provided and -with which a ball 47 is in engagement. 10
rl‘he'ball 47 is also in engagement with a socket 48Von the
lower end of a valve plug 50. The -valve lplug 50 is
adapted to seat on the lower >face of the'ñange 36. Inter
jposed -between the valve plug'Stl and the supporting disc
43, a` pairof bowed struts 51 and 52 is provided in com
portion .and an additional enlargedcylindrical bore with
»a transverse '-face, a valve memberin the upper end of
'central strut 45 and of the bowed struts 51 and 52 is
determined by the adjustment of the stem 40 ina con
said .tubular memberi-ncluding a cylindrical. piston having
an end 'faeepexposed tothe pressure of the fluid from said
supply rand having -a peripheral portion in Vengagement
~with -said wall portion sealing said end »of -said tubular
member against access @of vlluid from said supply, said
-v'alve' member `'being -downwardly Amovable within said
tubular member, and members in ïsaid tubular member
25 for retaining said valve Ymember in iluid flow preventing
fIt will be noted, however, that the compressive y"forces
applied tothe central strut 45 and the bowed strut-s 51 and
Y52 are transmitted only to the ilange 36 and thence to the
V’bushing 28, and are not applied‘uplwardly through the
control sleeve 35, the support tube 3_0 nor ¿to 'the >,balls
25. The eiïect of> expansion _ and >contraction 'of rvthe
tube ll() and nozzle v11 'does not affect the temperature
Tesponsive element, nor the forces applied upon setting
of the struts 45, 51 and 52.
1. A sprinklerjhaving a .tubular ‘member with one end
for connection to a supply of ñuid, a closure member
"for closing the other-end thereof, a temperature respon
sive element for «retaining said kclosn-re member in position,
-said tubular member'fhavingan interior cylindrical'wall
pression and in nnsymmetrical relation with respect to
'the central axis of the strut 45. The compression 'of the
ventional manner.
I claim:
'posit-ion, including a plurality of restraining members in
'fsa'i'cl cylindrical bore in engagement withsaid pistonand
«said transverse face, »and a-fcontrol tube retaining said
restraining members "in “holding positions.
The sprinkler temperature responsive element :and >the 30 _Y Y2. A sprinkler having a tubular member with one »end
vadjustment thereof is independent of the support of the
Vfor >connection to -a supply of duid, a closure memberfor
Ypiston lbecause of the abutment of the valve plug 50
vclosingthe other -end thereof, .a temperature responsive
againstthe seating flange 36. By reason of the 'engage
element for retaining'said closure member in position,
ment of the balls 25 with the end wall 1’7, the adjust
.fmentofthe position of the valve piston 20 as determined
by the support tube 30 and the balls 25 isv not affected .by
the .adjustment of the temperature .responsive element-of
the sprinkler.
The mode of operation will now be pointed out.
In use and in the set condition the structure will be
in the condition illustrated in FIG. l, with the upper face
,of the valve piston 20 Aexposed to the .pressure of the `fire
extinguishing fluid yand >held against downward move
ment by the balls 25 in the groove 23, Athe balls 25 .in turn
~said tubular member having an interior cylindrical wall
portionand an- additionalenlarged cylindrical bore with
a _transverse -face, _a valve member in the upper end of
said tubularvmember'inclu'ding a cylindrical piston having
an end face exposed to the pressure of the fluid from said
v'supply' l'and having a peripheral portion in engagement
'with -sa'id wall portion sealing said end of said tubular
lmember against access “of ñuid from said supply, said
valve member being downwardly movable within said
tubular member, and members in said tubular member
v4for retaining vsaidV valve mem-ber in ñuid flow preventing
being held in supporting positions by the support tube 45 position, said `retaining members> including a plurality of
'34), the control sleeve 35 and the temperature responsive
elements between the valve plug.50 and the disc 43.
YUpon the -occurrence of excess temperature in the
vicinityY of the-` strut 45„ fusing of the Alow melting point
'ball-sinsaid- enlarged bore in engagement with said piston,
`said- >enlarged bore and said end face, and a control tube
retaining said balls in holding positions.
~3.~ -A `dryl »pendant sprinkler comprising 'a conductor
material in the socket 46 will occur and the support fur 50 tube, `an inlet member ’for connection to a supply of liuid
nished by the strut 45 is- removed. The unsymme'trical
~secured to said tube a-t thefupperv end thereof, Vsaid inlet
.bowed struts 51 and 52 tend to exert a displacing force
member havingan interior bore witha bore of reduced
so that the valve plug 50 is disengaged from its seating
diameter thereabove and an lend -terminal bore there
position in engagement with the ñange 36. The displace
above of further reduced diameter, a bushing member
ment or collapse of these portions of the structure and 55 extending upwardlywithin said Aconductor tube from the
‘the consequent removal of _theplug 50 permits the »con
`ltiwer end thereof, said bushing member having an inte
`-trolsleeve 3S to move downwardly and fall away through
‘rior bore, said‘bnshing member havinga lower end face,
,one of the openings in the frame 38.
a control sleeve in’said bushing member bore and having
The removal ofthe control sleeve 35 permits down
`alower ñange for _engagement with said lower face, a
ward movement of the support tube 30 until the shoulder 60 -temperature responsive element carried by said bushing,
said temperature responsive'element including a closure
33 engages `the face 34. As the support tube 30 moves
downwardly, the 'balls '25 first move downwardly and
`member for engagement with _said flange for closing
then radially outwardly to positions _close to the bore
theV lower end ofsaid bushing, anda fusible device >for
'14 to free the valve'piston 2l) and permit the same to
‘normally retaining Ysaid ‘closure in seating `position Yon
move downwardly by the pressure’applied thereon by the 65 »said flange but separable with respect thereto' upon'the
>fire extinguishing ñuid, and pass outwardly through the
occurrence Yof excessive temperature, a vpiston Vslidably
v@lower end >of the support tube 30 and thus provide a free
mounted Yin said inlet member and having a portion in
and unobstructed passage within the support tube 30 for
>slidable engagement >with said Vend terminal bore, the por
ñuid ilow.
Vtion in slidable engagement with the end terminal bore
As the valve piston 2liì moves downwardly within the 70 having a lperipheral packing portion in sealing engage
Y support tube 30, the balls 25 fall inwardly into the interior
ment with Ythe end terminal bore, and members inter'
of the support tube 30 and pass downwardly therethrough
'posed' between said _piston and said Ycontrol sleeve and
4and outwardly.
'having portions at said bore of reduced diameter for re
.Fluid available >«from the supply to the inlet nozzle 11
taining »said piston in ilu-id'ñow preventing position.
i's' delivered downwardly through the .bore V18 and through 75 4. A dry pendant sprinkler comprising a vconductor
tube, an inlet member for connection to a supply of fluid
secured to said tube at the upper end thereof, said inlet
member having an interior -bore with a bore of reduced
diameter there above and an end terminal bore there
above of further reduced diameter, a bushing member ex
tion in slidable engagement with said end termi-nal bore,
the portion in slidable engagement with the end terminal
bore having a peripheral packing portion in sealing en
gagement with the end terminal bore, said piston having
a ball receiving groove in the periphery thereof, support~
ing devices interposed between said pist-on and said con
trol sleeve including a plurality of balls in said pi-ston
groove positioned by said intermediate bore, and a sup
port tube having a portion for engagement with said balls
tending upwardly within said conductor tube from the
lower end thereof, said bushing member having an in
terior -bore of lesser diameter than the diameter of the
conductor tube, said bushing member having a lower end
face, a control sleeve in said bushing member bore and 10 and retaining said balls in piston supporting position.
5. A dry pendant sprinkler as deñned in claim 4 in
having a lower ñange for engagement with said lower
which said support tube and said bushing member have
face, a temperature responsive element carried by said
interengaging portions for limiting the downward move»
bushing, said temperature responsive element including
ment of said support tube.
a closure member for engagement with said ñange for
closing the lower end of said bushing and a fusible de 15
References Cited in the tile of this patent
vice for normally retaining said closure in seating posi
tion on said ñange but separable with respect thereto
upon the occurrence of excessive temperature, a piston
Rowley ______________ -_ Nov. 14, 1939
lslidably mounted in said inlet member and having a por»
Gloeckler _.,.._-,_ ..... _., Nov. 7, 1,961
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