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Патент USA US2411212

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Nov. 19, 1946.
Filed May 7, 1942
2 Sheets-Sheet i
2/- I
"'27 '
'5 6
Nov. 19, 1946.
Filed May 7, 1942
2 Sheets-Sheet 2
Patented Nov. 19, 1946
Fred D. Hubbell, Baltimore, Md,
Application May 7, 1942, Serial No. 442,076
(Cl. 21-108)
2 Claims.
Figure 1 is a front view of one form of my ap
paratus and illustrates the same set up or in.
This invention relates to apparatus for ,fumi
gating buildings and the like and the apparatus
includes a gas generating unit or units that may
stalled with respect to a building.
powerful pressure producing fumigating agent
locking means aforthe band.
Referring to the drawings in detail, and par
ticularly to the form of ‘Figures into 3, which is
Figure 2 is a top plan view of the apparatus
be placed within or exteriorlyof the building,
per se.
but in any event is preferably fed at intervals
Figure 3 is a sectional View taken approxi
with a gas forming ingredient exteriorly of the
mately on line 3-3 of Figure 1, looking
building, thus the generation of the gas is under
the constant controlof the operator, yet the
t Figure 4 is a side elevation of a modi?ed iorin
latter is not subjected‘ :to the dangerous action
, i a
of the gas which is discharged into the building lo installed for use,
Figure 5 is a fragmentary detailed view of the
in ample quantities to destroy all life therein.
head and round ?ange and clamping band
A further object‘is to provide an apparatus,
Figure 6 is a fragmentary detailed view of the
which is preferably designed for generating a
having extremely effective life destroying proper
ties, such as for ‘example hydrocyanic acid gas,
which. is generated by using a solution of sul
phuric acid and water, astwo :of the ingredients .
and sodium cyanide as the other, the latter being
preferably in briquette form, commonly known
primarilydesigned ‘for fumigating large builds
ings, such as warehouses, ‘mills or thelike, it
as “Cyanegg,” and the apparatus in any of its
forms includes a container for the solution and
will be noted that it includes three generating
units, each being made .up of a metallic cylin
drica1 drum in having an open upper end Plio
vided with a closure in the form of a .disk shaped
lid I] that isremovably secured to the upper end
means whereby the briquettescan be dropped into
of the drum Joya suitable fasteninggmeans.
the solution to bring about the generation of the
The fastening means for the lid in the form
gas, which is conveyed into the building by a pipe 25 shown
is provided by forming an annular or
line or a system of pipes and, is forced there
marginal“ bead I2 about the upper end of the
through'by pressure ‘produced by the generation
drum and a marginal cross sectional rounded
of the gas and a draft created in the Pipe line
?ange i3 about the lid, the dense ?tting and
or system, the draft ‘preventing the gas from
upon the bead. A cross sectional
passing through the inlet through which the ‘bri 30 mounted
rounded transversely split clamping band 14 is
quettes are dropped, thus rendering the appara
?tted about the bead and ?ange. One end of the
tus safe for the operator, who, in no instance re
band has a bell crank lever 15 pivoted thereto
quires a gas mask when feeding the generator
at the juncture of the limbs thereof, and pivoted
unit or units.
to the outer end of the short limb i6 is one end
Another object is to provide an apparatus of
of a link I‘! that has. its opposite end pivoted to
the opposite end of the band. The long limb pro
more containers, each constituting :a generator
vides a handle, and by that construction, it wiil'be
unit for the gas, and they may be used individu
obvious that the band ‘is disposed into and .out
ally or collectively, it depending upon the size of
of clamping engagement with the ?ange and bead
the area to be fumigated.
upon swinging movement of the lever and pivotal
A‘ further object is to provide ‘a 'fumf gating ap
movement of the link I‘! securedto one .end of the
paratus, that is simple in construction, inexpen
band VI 4., whereby the band is tightened in clamp
sive to .manufacture, extremely ef?cient in‘ use
ing engagement to hold the limb in place when
and service and can be readily installed with
45 the lever is in the position of Figure 2,and sout
‘respect to a‘building.
ward movement of the lever from that position
This invention also consists in the construction
will release the band ,toallow removal of the lid.
of the apparatus, and in the combination and
While I have illustrated a particular type of fas
arrangement of the several parts, to be herein
tening means for the lid, I want it understood
after fully described, illustrated in the :accome
that any other suitable means ‘may ‘be :used for
panying drawings and speci?cally pointed out in
the character set forth, that includes ‘one “or ’
> that purpose.
the appended claims.
_ In describing the invention in detail, reference
will be had to the accompanying drawings where
in Iliketcharacters denote like or corresponding
Each lid is provided with a small chemical in
let hole ,I 8 ‘and a large gas discharge or outlet hole
I9. Formed on the lidand rising from about the
parts throughout the several views, and in which: 55 holes are necks 20 ‘and 2| respectively, the neck
fact that an upward draft is created in the sys
tem, particularly ‘by the use of the vertical por
non of'ithemain, line, the gas is drawn there
be slightly mounted’ on the elbow "or ?xed there
to, but in any event, the ?ange thereof is
adapted for disposal about the neck 2| for secur»
ing the elbow thereto against casual remova1 or
nels being
inlet used
for that
or holes
of the
cyanide is dropped through the funnels into the
solution at regular intervals to generate the gas,
as will be apparent. The generation of the gas
of course produces ample pressure for forcing the
same through the pipe sections and due to the
veying the gas from the generating units for dis
posal within the building A, as will be apparent
upon inspection of Figure 1. The elbow 24 ?ts
within the neck 2| for removal therefrom and is
held accordinglyby a flanged-collar 25 that may
720 being adapted to ?ttingly receive the outlet
spout 22 of a funnel 23 and the collar or neck 2!
is adapted to receive one end of an elbow 24 that
forms a part of a pipe system as shown, for con
through, therefore a minimum amount of gas if
_ any, will escape through the inlet openings of the
units. In fact, in practice it has been found that
it is unnecessary for the operator to use a gas
mask while feeding the sodium cyanide to the ap
The gas conveying pipe system is madeup of
a plurality of detachably connected pipe sections
including the elbows 24, it being understood that I
an elbow 24 is provided for each container or gen
paratus.‘ The sodium cyanide is preferably used
in briquette form, commercially known as “Cy
anegg/f as previously set forth, and it can be
erating unit, and while I have shown three units
readily handled with rubber gloves when in that
connected together for‘ simultaneous use, only 20 form, without injury to the operator.
one or two maybe used, it depending upon the
The form of Figure 4 includes a single con
areato be fumigated. In'anyevent the pipe sys
tainer or generating unit 35 exactly like the units
tem in the form shown; includes a main line 26
of the form of Figures 1 to 3, but the method ‘of
vand branch lines 21 and 28 respectively, the
fumigation of the form of- Figure 4 is different
branch lines being connected to the main line and
from that of the other form, in that the unit 35
the- latter is~connected to the center unit,‘ while
is disposed within the building, with a. pipe 36
the branch lines are connected to the'outerv-units,
connected to the neck 31 of the small inlet open
as clearly shown in Figure 2. YA Y-coupling 29 is
ing, the pipe 36 extending through a window
provided-‘for connecting the branch lines to the
opening Cain the'building D and has a'fu'nnel
main line and, each line includes straight pipe
shaped inlet end 38, through which the “Cyanegg”
sections 30. r The‘ main line also includes a lower
elbow 3|
briquettes are dropped by- the operator while
standing exteriorly of the building D for disposal
of the briquettes .throughithe pipe‘ 36 and into
connected to, the ' Y-coupling and ' a
straight pipe section vrising vertically from the
elbow 3|.
A discharge-nozzle 32 is‘ connected‘ to
the .upper end of the vertical straightsection and -
is provided with an elbow portion 33 for that pur_
pose, the nozzle-32 being outwardly ?ared lat
the sulphuric acid anc'ivwater solution within the
unit 35. t The large necked outlet opening 39 pref
erably has a pipe 43 secured thereto and rising
therefrom, to‘ prevent froth that is produced by
erally from the elbow portionii-to providean elon
of the gas from over?owing on the
‘gated outlet that {includes a marginal rectangu» I the generation
of the building, as will be apparent. lar'?ange 34 for disposal in ‘?tting engagement 40 floor
, It is thought from the foregoing description
with __the window B of the building A,>as best
that the advantages and novel features of the
shown in Figure l; which also illustrates that
invention will be readilyiapparent.‘
" '
the sash of the window is lowered on the'?ange 34
to hold the nozzle relatively ?xed in the window.
>Theijoints of the pipe sections are-preferably
sealed with tape‘or» thelike, and ‘suitable means
made in the construction of the apparatus, and
4-5 in the combination and arrangement ofthe sev
eral parts, provided‘that such changes'lfall ‘within
is provided for sealing the joint between the dis
charge nozzle'32 and the window, to prevent the
escape of~gas, as will be apparent.
the scope of the appended-claims.v
WhatIclaim is:
When it is desired to use the apparatusjfor-gen
erating hydrocyanic acid'gas, for which my ap
paratus is primarily designed, the desired quan
tity .of sulphuric ‘acid and :water solution is dis:
posed in one or all of‘the containersv'through the
-‘ "
additional ingredient therethrough for disposal
feature ‘renders theapparatus safe in every re
spect, so that the gas producing chemicals can be
fed to the'co'ntainers- or- units, as previously in
each opening and secured toand rising from the
lid, openfunnel means adapted to be inserted in
the neck of the inlet opening for vpassage of an
3 : 1 an
’ T w 5
prising a container for initially receiving gas pro- "
.From the foregoing and disclosure in the-draw
ings, itwill vbefseen that the apparatus of the
form ofirFigures liito 3 is‘ primarily designed to
be entirely disposed exteriorly gof-the buildings 1
dicated‘ to generate the‘ gas.-
a, lid closing the upper end and removably see
cured thereto, said lid being provided with a
relatively small inlet opening and a relatively
‘ large outlet opening for
the container, a neck for
and the position of the windows or like openings
relative to the ground level.’ The discharge nozzle
may likewise be eliminated and in that event an
elbow will be substituted therefor and sealed with
respect to thewindow Oriot'her opening in the
V and discharges gas‘ within the building.
ducing ingredients and having an open upper end,
tus with respect to di-i‘ferenttypes of buildings,
building wall, by any suitable'me'ans.
- ‘ ' 1. l Anapparatus for fumigating a building, com
.WhileI have shown and illustrated a'particu- ‘
'lar. pipeisystem‘, it will of course be understood
that the system will be varied as'to the-number
of. pipe sections and the arrangementthereof, in
accordance with the installation of the appara~
in the container to mix withthe'?rst‘ingredients
to generate gas,‘ a sectional sealed pipe line hav—
ing one'end connected to 1the<neck of‘ the outlet
opening for conveying the gas for discharge into
the building, said pipe ‘line includingla vertical
portion to ore-ate av draft therein. and a discharge
end "of the pipe line
and being of’ elongated formation to ?t within a
window of the building to discharge thegas into
, .2. -'An apparatus fo'r- fumigating a building,
comprising a ‘plurality of containers for initially
receiving‘ gas producing ingredientsand for dis-,
posal exteriorly of the building, ea‘ch container
having an ,openfu-pper- end, a closure :forjthev open
end; - means ‘de-tachably ‘securing'ithe' closure " to
pipe lines ‘connected to the outlets of the other
said end, each closure having a relatively small
containers, a, multiple ‘branch coupling in said
inlet normally open to the atmosphere and ‘a, rel
main pipe line and having the branch lines con
atively large outlet for the container, said inlet
nected thereto, the main pipe line having a
being adapted for introducing an additional in
gredient Within the container to mix with the 01 vertically extending portion above the points of
juncture of the branch pipe lines therewith, and
?rst ingredients to generate gas, .a sectional
a, ‘discharge nozzle connected to the upper end of
sealed main pipe line connected to the outlet of
the vertical portion.
the closure of one container for conveying the
gas to and into the building, sectional branch
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