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Патент USA US2124516

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July 19, 1938.
H. c. GRANT, JR‘ -
Filed Dec. 17, 1935
' -
6! wl/
Patented July 19, 1938
Harry Campbell'Grant, Jr., New York; N. Y., as
signor to Walter ,Kidde & Company, Inc.,
Bloom?eldyN. v.L, a corporation of. New Yorkv
Application December 17, 1935;? Serial No. 54,959 _
19 Claims. . _(01. 137-103),
It'is accordingly an object of the present in
This‘ invention has reference’ to" water traps
to provide a device which will‘ remove
adapted for‘ use with systems and: apparatus
comprising tubes-or pipes'through which air or any condensed liquid in the detector lines be
fore it canhprevent the detecting. system- from
gas is/continuously‘being‘ drawn by suction.
functioning at its highest efficiency.‘
The invention is particularly applicable to sys
_It is a further object to provide a condensate
tems and .apparatus used for the detection of
?re in. rooms-hand. spaces. which are removed remover which‘will operate automatically and
from the place ofidetection or observation. It will require no attention and will also permit a
relates more particularly to the typeoi system’ suction to be carried in the conduit at all times.
These objects, as well as additional objects and 10~
10 wherein'pipes oritubes'extend from the sepa
advantages will be best'understood from the fol- '
ratecompartments or rooms to the‘ point’ of
observation, that if ?re breaks ‘out in any one
space or room; smoke will automatically" be
drawn or‘caused to .flow to the observation‘ place
15 and in this way the fact that a ?re ‘exists in any
suohspace is made known, and‘ accordingly ap-'
lowing‘de'scription of a particular embodiment ofv ‘
the invention and by consideration of the, ac-'
companyingedrawingg the’ novel features of the
invention being set forth with particularity in
the appended claims.
In order that the invention may be better
Such~ ?re wdetectingsystems as ‘applied particu ‘understood; attention is directed to the accom
larly for marine usage have been‘ disclosed in pan'ying, drawing‘ in’ which Figure 1v is a vertical 20)?
‘patents to Freygang, No. 1,343,911,v and others. sectional View‘ showing a section through the“
The object of this invention is to provide an. cabinet, one of the‘ detector pipes throughout
improvement for such systems which‘ overcomes (except ‘where the ‘vertical and longitudinal legs
propriatesteps maybe taken. .
certain disadvantages that have arisen' in .the
thereof are broken away) and the upper ends of
two other detector pipes-leading into the cabinet
Apparatus of thistype has been subject to. of, a firejindicating system in which the present
one very. serious objection in. its .use on ships' invention has been applied. Figure 2 is a verti
cal sectionalviewshowing the details of the de
or in buildings when .the conduits connecting~ the .
rooms or compartments with. the observation ' vice of the present invention as it-is attached to‘
cabinet are subjected. to a series.o-f. temperature
30 ' changes depending on the paths followed by. the
conduits inconnectingthe spacesto the cabinets;
As is well known the moisturecontent of the
air. in-a given space may be varied by increasing
or decreasing, the temperature of the space. At
35 low temperatures the moisture. saturation point
of theair is considerably lower than the satura
tion point of the air. at a higher temperature.
Thus. with. a high temperature. a .given amount .
a conduit of‘ the .?re indicating system; Figure
3 is an elevational View at right angles to Fig-‘
ew '
ure '2 of the device of the present invention;
Figure 4 is a cross sectional view taken along
line 4-4 of Figure 2.
A brief descriptionof a ?re detecting system
with which‘ the present invention is used is best’
understood by reference to Figure 1.
35 i
The de- '
tector cabinet is directly connected to the space
which is to- be supervised by ‘a pipe or conduit ‘
of air. is capable of carrying ‘a larger amount. of . 3 which leads directly into-the chamber 5. The’ 1
open ends of the detector pipes are disclosed
40' moisturathanthe.sameamountof air can carry. through the glass front‘ ‘I. The ends are usually
atalowertemperature, Consequently,,if;a con- .
duitdrawing air, in which there is plenty of'._ arranged‘ in banks with the ends raised to dif
moisture, from. awarm roompasses through a
verycold‘ roomon its way to the cabinet, some
45 of-,,the-moisture in.§the airwill drop out‘as it
ferent' levels as can be seen by the various
heights at which‘ the ends 9; H and I3 of the >
detector lines are placed. The chamber 5 is il
luminated by arti?cial means, such as an-e1ec--~
tric-lightbulb so‘ that the presence of smoke
becomes liquid and. stays ‘in the conduit, collect
issuing from any one of the detector lines‘ may
ing at the lowest. point in the conduit. When .
su?icient condensed liquid has collected, ‘it will . be readily‘ascertained. A rotary blower '15 is
50" either decrease the area of the‘ conduit‘ and thus mounted in a suitable casing ll above the cham
ber 5, and'is operated by an electric motor I9.
the'amount of air 'being'drawn through the con
passesthrough-the colderregion. The moisture
duit, thereby decreasing the e?iciency of the de
A pipe 2i connects the interior of the chamber
tecting system, or it will close the conduit to ‘ 5 with suction of the; blower, and the exhaust‘
all passage of air, thus defeating‘ the whole pur
pose" of the system.
pipe 23‘ leads to the room in which the cabinet
is located whereby all; or, if desired, a part only
of the, air drawn through the'detector pipes will
be discharged into that room‘and the presence
of any smoke will be detected by its odor.’
suction present in the pipe. The material, size
The lower end of each detector pipe is pref
erably provided with a hood 25 in the compart
‘ment, made partly spherical, as shown, and
through which air and smoke will be drawn into
the detector pipe. Ordinarily the horizontal leg '
of each detector pipe with the hood‘ H at its '
end will be located in the top of each compart»
ment so as to be out of the way of its contents,
but obviously the hoods may belocated else
It will accordingly be seenthat in this system
the blower |5ris continuously or intermittently
operating, and will draw air through the several
detector pipes from all the compartments to which
they lead through chamber 5 where the escape of
smoke from the end of any detector pipe may be
and shape of the disc and they design of the cham- '
ber are such that any condensed liquid collecting
in the trap and escaping therefrom cannot raise
the disc to the seat 69 and so prevent the liquid
from escaping. A very high pressure would, of
course,'push this disc against'the seat 69 but the
slight pressure exerted by the liquid head is in
suf?cient to do this, being merely sufficient to
raise the disc high enough o?, the seat 43 to per
mit the liquid to seep around the edges of the
seat and. escape through the discharge passages.
In the wall of this casing at right angles to
the passage 59 are provided two square openings
which are bestv illustrated by Figure 4;. It is
through these openings that any liquid collected
in the conduit is permitted to escape. '
The entire ‘liquid trap consisting of the two
casings 29 and 51 is securely held in communica
20 observed through the glass‘! in the event ?re has ' tion with the hole 33 and the‘pipe 3 'by the '
broken out in the compartment corresponding to ' clamp 63. The casing 29 is provided with, lugs
that detector pipe.
65 having holes through which the clamp 63
In order to insure clear passage through the passes. The amount of pressure with which the
detector conduits in the event that liquid con
trap rests against the‘ pipe may be increased or
25 4 denses out of the air passing through the pipes, ‘
decreased or the entire trap may be removed from
each pipe is provided with one or more condensa
the pipe by means of the nuts 6'! which are in,
. 30’ .
tion traps at the low points in the pipes where
liquid would ordinarily collect. One trap 21 is
threaded engagement with the clamp 63.
shown on pipe 3.
naturally run to the lowest point and stand there.
The trap 27 illustrated by Figure 2 consists of
a main casing 29 of brass or bronze having a
The conduit ‘3 is provided
curved passage 3|.
with a hole 33 in which is placed a “Monel
If any liquid collects in the pipe 3 the liquid will a
The hole 33 is accordingly made at such a low '
point and the trap attached. The liquid seeking
a lower level will thenl?ow into the trap. It
will ?ow into the horizontal passage 3| where it
metal” sleeve 35 which extends through the pipe
will collect until enough liquid has been collected
and into the passage 3| where it rests on a seat
31. Surrounding the sleeve and resting between
the conduit and the casing is a gasket 39 to
to raise the disc from ‘its seat.
insure an airtight connection between the cas
ing and the conduit since'it is imperative that
40 no air enter the casing or the conduit during the
operation of the apparatus. The passage 3|
becomes horizontal and is met by the vertical pas
sage 4|. At' the upper extremity of this pas
sage is a seat’ 43.
Surrounding the seat 43 is a
chamber 745 which serves to keep the disc 4'! from
getting into such a position that it would not rest
on the seat .43 when it falls or is pulled to rest
on the seat. The disc must be made of a material.
which may be raised from its seat by the con
50 densed liquid,'be light enough to be drawn to the
seat by a slight suction, be impervious to air,
and make a joint with the seat through which
no air can be drawn.
A material which has
been found to have the required properties and
55 ‘which will serve the purpose is that known as
“Celeron” in the trade. Above the chamber 45
and communicating with it is another chamber
5| with a recess 53.
Another washer 55 sur
rounding the opening of the chamber 45 lies in
60 the recess 53.
Resting'on the washer 55 is an
As the amount
of liquid increases the level will rise until it has
reached the level of the square openings 6| when
it will ?ow through these'openings andescape.
Since the disc is of amaterial that will not ?oat,
it will be carried in suspensionin the liquidand
will thus permit the liquid to flow'by the seat v6|]
through the passage 59 and out of the trap.
When there is no condensed liquid in thetrap,
or when the amount or liquid is insu?icient to
close o?'the passage to the disc the suction which
is present in the pipe is suflicient to hold the disc j_
on its seat.
When the passage has enough liquid
to ?ll the passage but insu?icientg to raise the
disc off its seat the liquid in the passage will
serve to seal off the conduit fromthe air so that
in this condition there is nornecessity for the
disc and seat.
When I the liquid is suf?cient to "
raise the disc off its seatjthe liquid is free to
flow through the square passages when the level ‘
of the liquid has risen to the level of these pas-v
sages. Qbviously the amount of suction which is
present in the pipe will control the size of the
condensate trap. The trap as shown in’designed
for a suction of about an inch of water or less
but it is possible to use this trap when the suc- ‘:
outlet casing 5'! of brass or'bronze, the upper’ tion is greater. W'hen thertrap is used for a '
portion of which rests securely against the con
higher suction. it is necessary to periodically v
' duit 3.
This casing has a passage 59 of the same - shut oif the suction in thejconduit so that any
size and directly in line with the passage 4| of condensed liquid will be permitted to flow through
the main condensate trap casing. ,A seat 60 at the trap and escape. As long as avhigh suction
the end of the passage 59 is also provided, the is present in the conduit- it: will hold theliquid
purpose of which will be explained hereinafter. in the conduit and trap'and the'li'quid cannot
As will be noted the disc 41 is made of a diam
escape, but releasing the ‘suction permits the
, eter su?icient to prevent the disc from either
liquid to escape under its own head. However,
70. going up into the passage 59 or down into the . if it is desired to make a trap which will oper
passage 4|. The disc must therefore remain in ate at greater vacuum and permit a continuous 70:
the chamber 45 and no matter how the disc falls suction in the conduit, it is only necessary to
on the seat it will always close oiT the passage 4| ;
make the passage 4| longer and to design the
the degree of tightness with which it rests on passage 3| in accordance.
7 5 the seat, of} course, depending on gravity and the
The purpose of the seat 69 will now be ex
2,124;- 5116':
plained. In some installationsoft?re detecting means being. adaptedi to‘ present:‘theiiqescapeiioff
any: high pressure; fluid.‘ medium fintroducedi into it
systems, it has: been found 'torberv of. ‘advantagetz
to introduce, 1 upon the" discovery; ;.of." ?re? in: a
space-,-: a ?re"extinguishing'medium;. such as
the‘: conduit.
4; 'InliaT .water trap= ‘ for, ‘a -, conduit!‘ normally‘
under a partial vacuum, 'm‘eans‘lapart-i' from: lth‘eis 5.
carbon" dioxide‘) under pressure, or_ highzp‘ressure'.
steam, to‘ that : space ‘by \means of‘ the detecting -
conduit- to. collect any - waterxcondensedyi means»..
conduit. The extinguishing. medium'fmaylbes int- ‘
to». drainiawayithe‘ ' condensed‘ water, and = means
preventing ‘ entrance‘ of tair to. the trap; said 5 last
troduced through the ends-of the. conduit,fas-'i
named meansfbeing adapted to‘ prevent‘: theses-Pv
at I I, or- a special: valve: may: be ‘installedron , the
cape‘, of vany high-1 pressurev'?uidrimediumzintroe ..
101 conduit 3 which is1not~illustrated here: but: is’
shown in‘ the Freyga-ng Patent-No}: 1,343,911
previously referred to:- Wherrsuclr. av high pres?»
duced into the conduit}.
5. Ina trap for conduits'normally'under'suc- 7'
tion; means apart; from‘thelionduit‘uto‘ drain‘. andi.r
the conduit‘ the ‘pressure‘vis so‘ great thatvwhen'i collect: liquid‘ from; a conduit, means‘ t'otpermi'tf
escape. of‘ theiliquidy' means" preventing: atmose» 151 "
15 ’ the medium‘ enters: a trapit. will’; force/the-‘di'sc:
41 up against the seat .60‘ and presscit‘therei so‘ pheric air. from enteringi'thettrap; saidilastnam'ed.
tightly that'lnone of the medium can: escapezfrom means being. adapted. topreventhescape of any‘:
ther-trap: " Therefore,‘ it ‘will bet-seen that ‘the? high: pressure! ?uid medium introduced into the
surei?re extinguishing-“medium is'introdu'ced?nto'
disc \ serves‘ another‘ purpose in: that-it prevents v.
any high‘ pressure-medium introduced. into ‘ a: con:
6. In a me detectingv andi extinguishingzsyse'
temz comprising ‘ a series of_ conduits ‘i connectingv
duit' from escaping through. the" trap: . Anotherv
feature of‘ this arrangementr-is'thai?in the‘i'eventv the: spaces" to be protecte'd'to a centralIob'serva;
tion chambenand‘ having. meansftofldrawl theany foreign materialrcollectsin"the conduit ‘com
pressed r air: may.‘ be introduced through the open
air from the spaces; to the chamber and means
and consequently pressure; through; thev trap. '
uid condensation products ironi'Fthe7 conduits-1
It will thus‘ be‘ seenithat‘a trap:forra conduit‘
under suction has been provided'which will! main
!tain the suctionfin the conduit. by- maintaining
an' airsiclosed' connectionfvbut' which" will? auto
matically open i'when- condensedT-liquidi- has: col-"
lected-v in the conduit‘ and-lipermitilthe‘ liquid to
escape-and: thus preserve‘a clear'pa'ssage' through
comprising means to drain andv collect the con"
densation‘ products, means to" permit‘. escape‘bfw
the products, means to’ prevent'ithe escape-jot"
to: introduce a ?re‘ extinguishing?medium' underv
252 end of the conduit and the’undesired: element-1 pressure into the- conduit, means llOarI‘EIlIOVC _ liq‘ 25""
blown out of the conduit without losing the air,‘
ithe- I conduit . at f allf- times;v
the ?re-extinguishing medium under 1"pressure
from the conduits, and means to normally pre'-'
vent air fromi‘enterin'g‘. the conduitf'throughi' the 1?
'7. A trap’. for: conduits! normally v‘under suction: '
comprising- a - casing apart» from .1 the conduit have
Although the invention 'has- been particularly:
shown and "described in conjunction with" a ?ref» ring? a-passage' therethrough-Qa seat in; theficasing .=
indicating system, the invention is ~notl~itoilbel surrounding the passage‘, - a .disck'maintainedion
limited Ftofé ?re: indicating. systemssbut is to be the seat by the ‘suction, a casing havin‘glva .~ pa‘s- ;
applied wherever a line is under suction.
Having now fully described my invention,
what I claim is:
1. A combined trap and outlet drain for the
condensation products of a conduit normally un
der suction comprising a trap proper apart from
the conduit, means to conduct the condensation
products to the trap, means ‘to e?ect communi
cation of the trap with the atmosphere, and
means preventing such communication when the
conduit contains a high pressure ?uid medium,
said last named means being adapted to pre
vent atmospheric air from entering the trap.
2. A trap for liquid condensed in a conduit
under suction comprising a casing having a pas~
sage, a sleeve in the passage extending into and
sage vented to the atmosphere, and a seat in 40
the last named casing surrounding its passage,
said disc normally preventing communication
with the atmosphere and adapted to engage the
second named seat when high pressure ?uid is
introduced in the conduit.
8. A trap for conduits normally under suction
comprising a casing apart from the conduit to
collect condensation products, means to permit
vthe products‘ to escape, and means to prevent
entrance of air through the casing to the con
duit but permitting escape of the products, said
last named means being adapted to prevent the
escape of any high pressure ?uid medium intro
duced into the conduit.
9. In a condensation trap for a conduit nor
communicating with the bore of the conduit,‘ mally subjected to suction, means apart from
the conduit to drain the condensate from the.
a gasket surrounding the sleeve and lying be
tween the casing and the conduit, a chamber conduit, means to remove the condensate from
in the casing associated with the passage, a
seat in the chamber, a disc normally resting on
the seat, a recess in the casing associated with
the chamber, a gasket in the recess, a second
casing resting on the gasket andv bearing against
said means, and means to prevent the ?rst said
means from venting to the atmosphere when»
a high pressure ?uid medium is introduced in
the conduit, said last named means being adapt
ed to prevent atmospheric air from entering the
the conduit, a passage in the second casing com
municating with the chamber, and outlets con
necting the last named passage to the atmos- .
jected, to suction, a collecting casing associated ,
with the conduit but apart therefrom, an at
mospheric casing associated with the ?rst cas
ing, a seat in the ?rst casing, a disc on the seat
normally preventing communication with the at
3. In a condensate trap for a conduit nor
mally under suction, means apart from the con
duit to collect the condensation products, means
connecting the conduit with the collecting means,
means to permit ?ow of the condensation prod
ucts from the trap, and means in the collecting
means to prevent ?ow of air through the col
lecting means to the conduit, said last named
10. In a condensate trap for a conduit sub
mosphere, and a seat in the atmospheric cas
ing, said disc and said last named seat pre
venting leakage of any high pressure ?uid
medium introduced into the conduit.
11. In a trap for a suction conduit, a collec
tion; casing apart .irom the conduit, a‘ sleeve
joining the conduit and the‘ casing, a chamber
inthe casing,ra seat in ‘the chamber, a disc nor-.
mally on said seat, and: a second casing asso
, ciated with the chamber of the ?rst casing, said
second casing venting to the atmosphere.
'12.: In a trapfor a suction conduit, a collection.
vcasing, a sleeve joining the conduit and casing,
a gasket between the conduit and casing and sur
10' rounding the sleeve, a chamber in the casing, a
seat in the chamber, a disc on the seat,.a recess
in thecasing adjacent the chamber, 'a gasket in
the recess; a second casing resting on the gasket
and bearing on the conduit, an atmospheric vent
in the second-casing, lugs on the ?rst casing, a
clamp passing through the lugs and securing the
' whole to the conduit inairtight relationship.
conduit, means. communicating with the atmos
phere,-a_nd means to normally’ prevent commu
nication between the conduit and the atmosphere;
said last named means being operable to permit
the condensate to escape through the means com- , 5 1'
municating with the atmosphere and to prevent '
the escape of any high. pressure ?uid medium,
introduced in the conduit;
17. In a trap for a suction conduit, collecting
means apart from theconduit, a pair of valve 10 f
seats in the collecting means, valve means be
tween said pair of seats adapted to be seated in‘
one direction by suction in the. conduit and in
the opposite direction by pressure in the conduit,
and means vented to the atmosphere associated 15,
with the collecting means.
18. In a ?uid trap for a suction conduit, means
13. .In a condensate drain for a suction conduit, apart from the conduit to‘ collect the ?uid, means
means to permit escape of the condensate and vented in the atmosphere to permit, the ?uid to
20. means'to normally prevent communication with V ?ow off, and valve means preventing entrance 20
the atmosphere, said last named means being 1 of atmospheric air to the collecting means and
adapted to prevent the escape of any high'pres
preventing the escape of any high pressure. ?uid
sure ?uid medium introduced in the conduit.
medium introduced in'the conduit.
14. In a condensate trap for a suction conduit,
19. In a trap for a suction conduit, a collector
a collecting casing apart from the ‘conduit, av casing, a sleeve connecting'the conduit and the
25 1;
chamber in the casing, a seat in the chamber,
casing, a gasket surrounding the sleeve between
adisc on the seat, a recess in the casing adjacent the conduit and the casing, a chamber in the
.thechamber, a gasket in the recess, a second
casing, a seat in the chamber, a disc on theseat,
casing'associated with the ?rst, and an atmos
a recess in the casing adjacent the chamber, a,
30 pheric vent'in the second casing.
gasket in the recess, a second casing resting on
15. In a liquid trap for a suction conduit, a
the gasket and bearing, on the conduit, a seat "
liquid collecting casing ‘apart from the conduit,
on the second casing, said disc being adapted to
a seat in the casing, a disc on the seat, a second
rest on the'last named seat when the conduit
casing associated with the ?rst, and atmospheric contains a high pressure; ?uid medium, an at
- Q1
Q ,vents in the second‘casing, ‘said disc being raised ' mospheric vent in ‘the second'casing, lugs on the
from its seat by the drained liquid to permit the
?rst casing, a clamp passing through the lugs
escape thereof through thev atmospheric vents. ' and securing the trap to the conduit
in airtight
, 16. In a condensate trap for a suction conduit,
a condensate collecting casing apart from the
Patent No. 2,124., 516,
July l9, 1958.
It is hereby certified that‘ error appears in the'printed specification
of the above numbered patent requiring correction as follows: Page 2, second
columntline 58, for \the word "in" read is; page 5, second column, line l,_
claim 5, for "present" read prevent} page h, second column, line 19, ‘claim
18, for, "in" read to; and that‘ the said Letters Patent should be read with
this correction therein that the same may confonn to ‘the record of the case
in the Patent Office.
Signed and sealed this 15th‘ day of» September, A. D. 1958.
Henry Van Arsdale
Acting Commissioner of Patents.
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