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Патент USA US2115356

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April 26, 1938.
Filed Dec. 5, 1936
30* 34 32
2,1 15,356
Patented Apr. 26,- 1938
‘ ,
Frank W. Anderson, Roslindale, Mass, assignor
of one-half to Orr J. Palmer, Quincy, Mass.
Application December 5, 1936, Serial No. 114,425
5 Claims. (c1. 236--59l
This invention relates to improvements in hot
water or steam traps, and the principal purpose
of the invention is to provide a durable, e?'lcient
and economical trap having a thermostatically
5 operated valve arranged to open or close abrupt
coiled about and attached by welding or by screws
3! to a spindle 32 which passes inwardly through
a stu?ing box 33 on the cover l5. ,It will be un
derstood that the number and width of the re
silient bimetallic strips 29 may be varied as de- ‘
ly, thereby to avoid the wearing or pitting of the
valve seat which characterizes the slow-acting
valves heretofore used in trapsof this type.
projecting end of the spindle 32'and an adjust
ment screw 35, under spring tension, connects
Further objects
tion and mode of
element and valve
inafter described
reside in the novel construc
operation of the thermostatic
of the improved trap as here
and pointed out in the ap
pended claims.
A recommended form of a hot water trap em
bodying this invention and adapted particularly
for the heat system of a laundry, is illustrated in
the accompanying drawing, in which:
Fig. 1 is a side view looking toward the cover
of the improved trap, partly broken away and
20 partly in section;
Fig. 2 is a bottom view of the trap as shown in
Fig. 3 is a detail section on line 3—-3 of Fig. 1;
A lever or arm 34 is fastened to the outwardly
the arm 34 with a stationary support 36 a?ixed 10
to the cover, so that the position of the spindle
and, consequently, the'position of the coiled ther
mostat and the valve may be manually varied
by operating the adjusting screw when desired.
The adjustment is preferably such that the trapv
valve will automatically open at approximately
160° F. and automatically close at 180° F., under
a water pressure of 100 pounds or higher.
case of necessity, however, the valve may be man
ually opened or closed without removing the
cover l5, by moving the lever 34 or rod 3l-con
nected to its outer end. Such manual operation
of the valve is particularly important when it is
desired to produce a “blow through” of the-hot
Fig. 4 is a plan view .of‘the thermostatic ele- . water after the trap andheat system have been
ment of the trap shown in Figs. 1 and 2.
In the particular embodiment chosen for the inactive, in order to afford quick heat'in the
purpose of illustration, the trap comprises a cas
It will be understood that any rotative move
ing having body casting ll providing a chamber ment
of the spindle 32 changes the position of
30 for hot water or steam, and having inlet and out
the thermostatic link with the valve stem 23 ‘
let ports 12 and 20, respectively, and a plugged, and tends to move the valve tip toward or from at
optional inlet It in one side; a cover I 5 secured its seat; and that variations in temperature of
upon the ?anged open side of the body or casing the water within the trap automatically change
by bolts or cap screws l6, and sealed by a gasket the position of the expansible thermostatic strips
IT; a valve mounted at the outlet; and a thermo
and thus tend to open or close the valve. For
static control for the valve, carried by the side example, if the coiled thermostat as shownin
or'cover I5. The trap is preferably mounted for Fig. 1 is caused to expand by higher temperature
use in the position shown in Fig. l, but it will be
conditions, the valve stem will move toward clos
evident that it may be suitably mounted at any ing
' '
convenient angle.
The valve consists of a metal tube or sleeve l8
screwed upon a threaded end [9 of a nipple 20
mounted in the outlet and having a relatively
small opening 2| therethrough which may termi
nate in a ?aring mouth 22 at the outer end of
the nipple; and a rod or stem 23 slidable in the
tube and formed with a pointed or conical tip
24 adapted to engage the valve seat at the inner
end of the opening 2|. Radial ports 25 in the
tube l8 lead to a chamber 39 between the valve
tip and the valve seat when the valve is open
as shown in Fig. 1, so that water may ?ow
through the ports 25 and outlet ori?ce 2|.
The opposite end of the valve stem 23 is pro
Ll Sr vided with a peripheral ?ange or nut 26 which is
slidably received in the slot 21 of a block 28 to
As the valve starts to close under in?uence ‘of I
the thermostat, the pressure in the innerend'of
the outlet ori?ce 2i immediately drops, and the
valve stem is snapped against its seat by the dif
ferential in water pressure inside and outside the
valve which overcomes any resistance of the re
silient thermostat. Conversely, when a drop in
the Water temperature causes the thermostat to
contract and thus tends to move the valve 011’ its
seat, the initial movement of the valve stem al
lows hot water to enter chamber 39 through the to
tube ports 25, thus raising the pressure in the
inner end of the ori?ce 2| and equalizing the
pressure on the opposite ends of the valve stem,
and allowing the stem to be quickly moved to
fully open position under the action of the re- '
thermostat. In the latter case, the initial
which the bimetallic strips 29 of the thermostatic silient
contraction of the thermostatic element tends to
control are attached by Welding or by screws 30 .
build up a torque in the resilient strips 29, owing >
as best shown in Figs. 3 and 4. The opposite
to the resistance of the water pressure; and
60 ends of the parallel thermostatic strips 29 are
that torque action is released when pressure is 60
having radial portsadjacent said seat',»a valve
- equalized, as aforesaid; sothat the valve springs
to fullyropen position."
stem slidable in said sleeve and having a tip en
gageable with the valve seat to close the discharge
ori?ce, a spindle extending into the: casing
The rapid action of thevalve results from the
provision of therelatively long and narrow out
‘ letyori?ce 2| which,
'- through the cover, and Tal'resilient thermostatic
combination with the
:m'ember coiled about and attached to said spin
"apertured sleeve 1 8,'ensures~ that a differential in gdle and connected at its opposite end to the 'valve
pressure is created betweenlthe inner and outer stem for automatically opening or closing the '
tends: of,,said ori?ce,» when the valve tip 24' is" valve under changing temperature conditions,
slightly o? seat in opening orfclosing move
and manuallyoperable adjusting means located
10 ment.' 'It will be observed that the ‘bore of the
on the outside of the cover iorlrotating the spin
ori?ce 2|‘ is substantially smaller vthanthat of »
dle to vary the position of the coiled thermostatic
the‘sleeve or tube 18, and that the ‘length of the
ori?ce is very muchgreaterthanvthe diameter of
its bore, the'lproportionrbeing approximately ten
15' torone in the size illustrated. 'Such
ment creates a-rapid drop in pressure at the in;
character described com- o ' V
prising a casing provided'with inlet and outlet
‘ports; thev outlet having a relatively narrow fdis-
charge ori?ce, the inner ,end ofqwhich‘constitutes
'ar'valve 'seat; a, sleeve disposed within" the; case
ner; end‘ of the, ori?ce when the valve is closing,
= 3.’ Aheat trap'oi the
and a rapidrbuild‘up of ‘pressure, atthat point it
. mg andextending ‘inwardly fromv-thetvalve seat;
when the valveisopening;
; l : _
and: having éradial' ports adjacent ‘said \ seatil-ga 205’
VA quick-acting valve‘ constructed ‘as ab'ove‘de
1-2.0 1scribed
v'alve'vstem slidableinsaid sleeve and having a tipw t
is especially desirable andle?icient in 'a
[high pressure hotgw'ater system 'for which the‘ '7 engageable with the valve seat to close. the dis+ " _
"traps herein illustrated was devised, for it elimi
charge. ori?ce;
a spindle-extending into thecas- "
7 ing rthroughzthe cover, and ‘a resilient .thermo-I
"natesithe wear ‘and corrosion of, the valveseat
static member coiledqaboutnand. attached to said» '25 V t 1
resuIting-iromthe rush of waterljpast the pare;
‘connectediatr-its oppositeend to "the,
spindle and for
automatically. opening or closing
' tially, open ‘elementsjoi a slow acting valve, This v
' valve stem;
' advantage, is, also achieved when _,a trap ‘of the
the’ ‘valve ‘under changing temperature ‘zcondig
' character. indicated is‘ employed in ; a 1 steam sysj
ttem,'if_or >a quick-acting valve avoids‘lprolonged'
‘tiofnskandamanually operable means connected to » ‘30
l '3 _ . l
, spindle.
on theouter side of the cover»_ior_;ro-'
wearing action of the; steam on the valve seat;v ’ the
tating' the, spindle to,‘ move thethermostaticvmema
i and this invention is intended-foriuse with steam " her and open-the valveeirrespectivefofjthe tern-y
'ia's'well'as hot,water,;as aforesaid; ,t - I
; i‘Thegimproved (trap wnotqonly , provides :a;p_OSi:-f perature within the ‘casing’.
quick-acting ; valve, ' but. , also
_' ‘ tive,jr;durable - and
;‘ 73g};la?ordsleconomies‘ in manufacture 7 owing‘ to ; the t
prisingra casing provided with- inlet 'and'rputlet
portsbthe outlet having ;_a relatively narrowdis
charge’ ori?ce; thejinneri end' ofwhich con‘
f ' 'simplicityiof the parts andtheease oi assembly. 7
\ ItqwilLbe noted‘, iorgex'ample; :that Valli-of .thei mov-v
" ableielements ;;are'_, carried by’ the trap "cover ~;| 5
land iexcept'for theivalviestem?rl maybe mount‘- ‘
‘ed as‘ a unit'on the cover-beforegitisscrewed; to’ V
'the'bodycl I.
7' -.
" "
tutes agvalve; seat‘; a sleeve _ disposed}; withi
,casing'and extending inwardly from the" valve
seat, and‘ having’ radial-‘ports adjacent ,said’seatr
with-thesvalve seat-to
and having
closehthea , j j
l ' It will‘ be apparent that ‘the structural details discharge; ori?ce,;a, spindle?extendinginto-the.
offthe trap herein‘illustratedj and described may ca'singthroughythe cover, and _a resilient thermo-- ii~457 - 'V" f ‘
.be ‘varied ‘to-‘suit particular 'purposes'withoutide
_ static member 'coiled’aboutfand; attached to, said.
parting from the essence of this invention’ as de
vfined in the following claims. 7;
V ",LqA‘heat
spindle and connected atits opposite end togrthej " ~
' '
the valve under changing temperature- ._ condi-_ = t
trap/off the character described com- !
prising; a’ casing, provided with" inlet 7, and outlet
valve stem ion-automaticallyopening or closing;
'tions, an-arm connected to theouter endvofylthe l 7'
7 ~
spindle and adapted to rotate vthe;spindleto vary '50
‘outlet havingaj relatively
end of
and nar~'
con- 7 , the position of thethermcstatic?member,an ad
the arm in predeter- v V
‘f stitutes-ayalve seathaf'sleeve disposed withinzthe - justingrzscrewgfor-setting
mined positiomthe arm-‘being manually "movable ‘
Leasing andexténding inwardly‘ from ,theiizvalive
t seat ‘ and having radial ports adjacent, said seat,’
' to, >rotate'ithe spindle '‘ and : open; the‘ valve; irree :
spective'of the setting of-the'adjusting screworg {7 ‘ V
valvelstemtslidable 'inisaid'lsleeve and'having a
5,5 atipyengageable
trap oi
the character
the casing}
described,.; come,
with‘ thenvalve'seat to’ close the ' the
discharge ori?ce, and 'a-,~,thérmostatic:_e1ement '' prising ‘a casing provided‘ with inlet'andjoutletr
‘7 ‘connected to "theQvalve stem and’ automatically “ports, the latter having a discharge ori?ce "andia
operative; under changing conditions of tempera; "valve seat at its'inner endi a-valve having a tip
to" cause rapid opening- or engageable withxsaidxseat to closeth’e' outlet/Qa
Y7 to turewithin the casing
closingof the valve, the bore of.-the ori?ce being
the : casing ~> through I the
substantially-less than ythat of‘ the‘ sleeve and V_
_ t
spindle ‘:extendingjrinto
' cover, and; a resilient
about and _ attached
.lthanzthe 'diameter'of itsyvbore, so'that the'valve. V
the ‘length- of the ori?ce being very much greater
thermostatic. member ecoiled
to ‘said spindle and ‘cone
Inected- at its, opposite endtolthevvalve, stem-ivory
‘ 465' rapidly snapsito open forfclosedspositionl under : . "automatically
opening,orclosing:thewalveaunder' 7
in?uence of'saidthermostatic element. 'changin‘gFtemperature
located} on
t the outside 7'7 describedxcom-l
' V a_12."A-heat trap of the character
_; prising a; casing ,provide'drwith inletriand outletw
' 5 ports," the outlet Y having a relatively Tnarrow 'dis'-.
charge ori?ce, the inner end ‘of which constitutes ‘a
aivalve seat,‘ a sleeve'disposed within the casing
and extending'inwardly; from the valve seat;'and
operable‘vv adjusting " means
of the'cover for rota-tinggthe spindle 'to-vary the '7 ‘
position of the coiled thermostatic elementllnj; ,
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