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Патент USA US2117581

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May 17, 19.38-
Filed March 20, 1936
Patented May 17, 1938
Samuel A. Stoneback, Philadelphia, Pa.
Application March 20, 1936, Serial No. “.77!
In Canada January 24, 1936
SClailns. (Cl. ZIP-58.5)
My invention relates to a new and useful air
change means for a window glass insulation sys
tem and is particularly adapted for use in con
nection with my invention set forth in Patent No.
2,042,077 which was co-pending application, Se
rial No. 741,891, filed August 29, 1934, andallowed
October 31, 1935.
One of the objects of the present invention is
to .provide a structure consisting of spaced par
0 allel panes of glass in doors, windows and the
like to form a dead air space which will act as
insulation against a temperature on the outside
of a building different from the temperature on
the inside of the building and having means
15 whereby the air within the space may be re
moved and displaced by other air.
Another object of this invention is to provide
means whereby any humid air within the dead
air space may be removed to eliminate the hu
Fig. 2 is an enlarged vertical sectional view of
the two sashes of the window.
Fig.‘ 3 is a section on the line H of Fig. 4.
Fig. 4 is an enlarged fragmentary face view of
one sash like the illustration in Fig. l.
Fig. 5 is a fragmentary sectional view, the same
as shown in Fig. 2 illustratingv the use of a hand
pump for changing the air.
Fig. 6 is a longitudinal sectional view of one
sash showing a modification of the invention, and 10
Fig. 7 is an enlarged fragmentary section sim
ilar to the illustration in Fig. 6 to show certain
details of construction.
In carrying out my invention as herein em
bodied ill represents a frame of door, window or 15
the like, which for purposes of illustration is
shown as a sash of a window. This frame III has
the usual or primary pane of glass I! mounted
therein which must beair tight.
midity and to replace such air with dehydrated
An additional or secondary pane of glass I2 is
” air and thereby prevent the formation of mois
placed directly against theface of the frame II n
ture on the glass, generally known as sweating, so as to be disposed across the light opening and
due to the differences in temperatures on oppo-‘ in spaced parallel relation to the primary pane
site sides of the panes of glass.
of glass ‘I I. Where the invention is'used in con
Another object of the invention is to provide nection with double hung or sliding window
' openings leading from and to the dead air space sashes. said additional or secondary pane of glass '
whereby an air pumpmay be used to ,force air i2 is placed on the outside face of the upper
through one of the openings and drive out the sash and on the inside face of the lower sash._
air within the space through the other opening. The additional or secondary pane of glass I2
Another object of the invention is to form is held in place by suitable molding II with a
recesses in the sash and holes in the moulding plastic‘ compound H in grooves or recesses to
aligning with the recesses whereby openings or provide tight joints. The construction thus far
air passageways are produced which are closed
except during the air changing operations.
referred to is fully described in my co-pending
application above mentioned. 1
A further object of my invention is to produce
By this arrangement of the two panes of glass,
the recesses or inner ends of the openings of a dead air space I5 is formed that e?lciently insu- 8‘
unique formation to assist in distributing the air lates one side of the frame from the other and
prevents the passage of heat or cold, as the case
within the dead air space.
A still further object of my invention is to may be, from the outside to the inside of a build
4° provide a valve controlled opening leading to the ing.
In the top and bottom rails of the frame II ‘o
dead air space.
With the above and other objects in view, this are formed recesses or notches‘ l6 _ under the
invention consists of the details of construction .mouldings l3 and holes I‘! are made through
said moulding in registration or alignment with
and combination of elements as well as partic
‘5 ular arrangements of parts hereinafter set forth the recesses and beyond the edges of the ‘glass
I! thus providing openings or air passageways
and then speci?cally designated by the claims.
the outside of the frame to the dead air
In order that those skilled in the art to which
this invention appertains may understand how
to make and use the same, I will describe its
construction in detail, referring by numerals to
the accompanying drawing forming a part of this
application, in which:
Fig. l is a view in elevation of a window em
gg bodying my invention.
space. Preferably these openings or air passage
ways are diagonally opposite each other so that
air forced into the'dead air space through'one 50
opening will ?ow over a larger area directly to
ward the other opening than if the openings are
in a perpendicular line.
To assist in spreading the air stream, the re
cesses or notches I. are formed so that their gg
walls diverge inwardly or from the points where _
the holes I‘! communicate with them and pref
erably the inclination of one wall of each recess
or notch is greater than'the other wall as indi
5 cated in Figs. 1 and 4.
The holes I‘! have threaded plugs I8 screwed
into them for closing the openings or air passage
ways and upon their removal the‘nozzle of an
air pump I9’can be temporarily mounted in one
10 of the openings and air forced into the dead- air
space 15 which will drive the air in said space
out through the other opening thereby replacing
such air.
If desirable a tube or elbow 20 can be ?tted
15 in each opening or air passageway and the outer
end of such tube is normally closed by a threaded
1. A frame having a primary pane of glass
mounted therein with air tight joints, a secondary
pane of glass placed against one face of said
frame so as to be in spaced parallel relation to
the primary pane of glass to form a dead air
space, said frame having recesses therein back of
the secondary pane of glass and extending beyond
the edges of said secondary pane of glass, means
including moulding to hold the secondary pane
of glass in place and form air tight joints, the 10
moulding having holes therethrough communi
cating with the recesses and adapted to receive
air evacuating means for replacing the air in the
dead air space, and screw plugs removably
mounted in the holes to normally close the air ll
2. A frame having a primary pane of glass
Upon removal of a plug the air pump 19 can be mounted therein with air tight joints, a secondary
attached as previously described. For purposes pane of glass placed against one face of the frame
20 of illustration I have shown one of the tubes 20 to provide a dead air space, moulding to hold the
with a spring actuated check valve 22 but it will secondary pane of glass in position with. air tight
be obvious that both tubes in one assembly can joints, said frame having recesses in its top and
bottom rails diagonally opposite each other back
be used with or without valves.
of the secondary pane of glass and communicat
It has been discovered that under some condi
I25 tions, as during damp or rainy weather, when an ing with holes through the moulding beyond the 25
installation of the insulation system is made, the edges of the secondary pane of glass, the walls of
\dead air space contains humid air and due to‘ said recesses diverging inwardly and the walls
toward the vertical center of the frame having
changes of temperature the moisture will accu
the greatest inclination, and closures removably
mulate on the glass. While this is not especial
30 ly detrimental it is undesirable and annoying. mounted in the holes.
3. A frame having a primary pane of glass
By removing the closure plugs and connecting
an air pump or suction device to one of the air therein, a secondary pane of glass placed against
passageways the air within the dead air space one face of said frame in spaced parallel rela
can be removed and replaced by other or fresh tion to the primary pane to form a dead air space,
35 air which has vbeen dehydrated naturally or means to secure the secondary pane in place, a
caused to flow through a suitable dehydrator, plastic composition for sealing the joints between
such as a tube containing silica gel. When this the edges of said secondary pane'and the frame,
has been done very little condensate can form a tube set into the frame at the upper part of the
under the most adverse conditions and the chance dead air space and forming a communication be 40
tween the exterior and interior of said dead air
40 of frosting is reduced to a minimum.
of course I do not wish to be limited to the space, and another tube set into the frame at
exact details of construction herein shown and the lower part of the dead air space and also
described, as‘these maybe varied within the scope forming a communication between the exterior
of the appended claims without departing from and interior of said dead air space, said tubes
permitting the removal of air from and the injec
45 the spirit of my invention.
Having thus fully described my invention what tion of fresh dry air into said dead air space.
I claim as new and useful is:
plug' 2| screwed into said outer end thereof.
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