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Патент USA US2116615

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May 10, 1938.
Filed Aug. 10, 1956
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Patented May 10, 1938
WINDOW `c‘ONs'rRUo'rloisr
Ollie c. Caldwell, Lisbon, Ohio
Application August 1o, 1936, serial No. 95,066 `
2 Claims. (o1. 20,-69)
'I'he invention relates to improvements in Win
dow construction and is more particularly di-'
rected to a two-sash double-hung Window.
An object of the improvement is to provide a
5 `Weatherproof window structure of simple and
inexpensive construction, which is easily and con
veniently installed and eñicient in operation to
prevent leakage or the inñltration of dirt or dust.
A further object of the improvement is to pro
10 vide a tongue and groove meeting rail which will
prevent air leakage and infiltration of dust and
dirt at this section of the window.
Another object is to provide such a meeting rail
which will be no more expensive than the con~
15 `ventional meeting rail and which will render un
necessary the expense and inconvenience of sub
sequently weatherstripping this portion of the
Still another` object of the invention is to pyro
go‘vide a window construction in which the sashes
are so mounted in the frame as to obviate the
necessity of using the ordinary parting stop and
although the usual blind stop and inner stop
may be used merely for trim, they are not essen
25ì tial to the proper positioning of the sashes within
the frame.
A still further object of the invention is to pro
vide a weatherproof construction of ‘sill and bot
tom rail of the inner or lower sash.
Another object of the improvement is to pro
vide a one-piece head casing and water table
which effectually takes care of the water drip and
requires less material and less labor in construc
tion and installation.`
An important object of the improvement is to
provide a weatherproof Window in which the
Weatherprooñng is constructed principally of
wood, thus utilizing the great advantage gained
by ease and economy of construction over other
Another object is to provide a weatherproof
window that will operate with unvarying ease
and smoothness, permitting no unnecessary fric
tion by the proper placing of the various parts
of the window.
Another object is to provide a weatherproof
window with the jambs grooved in such a manner
that an eñicient sash balance can be installed.
The above objects, together with others which
Will be apparent from the drawing and descrip
tion, or which may be later referred to, may be
attained by constructing the improved window in
the manner illustrated in the accompanying
drawing, in which
Figure 1 is a vertical transverse section through
a Window embodying the invention; and
Fig. 2, an enlarged fragmentary section taken
as on‘the line 2-2, Fig; 1.
Similar numerals refer to similar parts
throughout the drawing.
The Weather sealed window unit embodying the
invention is constructed of wood with a minimum
of metal parts. “ The advantage of a structure of
this kind is that the window unit can be manu
factured in a lumber mill of a material that can
be formed into desirable sizes and shapes with a
minimum `of labor and at a minimum cost.
The frame of the window includes a sill IB of
conventional o type having
an integral rib or
tongue II formed on its upper face and arranged
to engage in a corresponding groove I2 in the
bottom of the lower rail I3 of the inner or lower
sash indicated generally at I4. As illustrated in
Fig. 1, this tongue and groove are similarly ta
pered so that they will engage loosely as the sash
is being lowered and will produce a tight-fitting
wedge contact as the sash is completely closed.
The window frame includes a pair of side jambs
I5, each of which may be provided at its inside
with a rabbet I6 in which the inside stop I'I may
be fitted. Although this inside stop may be used
for the purpose of trim, it is `not essential in order
to properly `position the sashes of the Window for
sliding movement and as the stop is only for
architectural effect, it is purposely spaced from
the lower sash to prevent friction and also to
prevent the stop from becoming stuck or glued
to the sash with paint.
Each side jamb I5 has in its face adjacent to the 35
Window a groove I8 for each sash extending the
full length of that portion of the side jamb en
gaged by the sash, that is, from the head jamb
I9 to the sill III.
Each groove tapered as best shown in Fig. 2,
producing a groove with a narrow bottom to
receive a wood weatherstrip 20, preferably hex
angular in form and approximately twice as wide
as its maximum thickness. This wood weather
strip is thus formed for a two-fold purpose, it
can be readily adjusted into the groove of corre
sponding shape without effort or without fric
tion, and can be readily and easily removed with
out danger of breaking or mutilation.
A groove 2I is formed in each sash adapted to
register with the groove I8 in the jamb, the
groove 2I‘being of the same shape as the groove
I8 but proportionately wider and deeper. This
permits of a substantially U-shape sheet metal
lining 22 being located within the groove 2I and
attached to the sash as by nails 23 or the like, this
lining or weatherstrip member being preferably
of spring metal so that the legs 24 thereof will
frictionally engage the sides of the Wood weather
strip 2D which projects from the jamb into the
`groove of the sash as illustrated.
In order to
properly center the metal lining 22 within the
groove 2|, the bottom of said groove is reduced
so as to receive the inner edge of the U-shaped
10 lining as indicated at 25.
This metal lining is thus located an ample dis
tance from the walls of the groove 2l so that any
swelling of the sash which may be caused by
moisture will not interfere with the free action
15 of the sash on the Wood weatherstrip. The metal
lining fitting tightly upon the wood Weatherstrip
precludes the possibility of any air leakage and
of infiltration of dirt or dust and forms a smooth
track for the sash to slide upon, thus obviating
20 the necessity of providing a parting stop and also
making it unnecessary to provide the usual inner
stop and blind stop unless the same may be de
sired for trim or architectural effect.
While the metal lining 24 frictionally contacts
25 with. the wood strip 20, the friction is slight, be
ing no more than is essential to make the Window
jambs of the window frame and although no at
tempt has been made to illustrate in detail this
unique balance, which in itself does not form a
part of the invention, the same is indicated gen
erally at 32.
The blind stop 33, as above stated, may be pro
vided for trim and architectural purpose al
though it will be readily seen that the same is
not necessary to -assist in guiding the upper sash
and as shown in the drawing, this as well as the 10
inner stop l1 is preferably spaced slightly from
the adjacent sash so as not to produce any fric
tion. In order to provide a tight seal `at this
point, the blind stop 33 may be provided with a
tapered groove 34 which receives a similarly
shaped rib 35-upon the abutting edge of the side
From the above it will be seen that not only are
the inner stop and blind stop unnecessary me
chanically and so located as to not produce any 20
friction, but the conventional parting stop may
be entirely eliminated. This parting stop has al
ways been a source of trouble and annoyance to
the craftsman who assembles `and otherwise
works upon the window and although attempts
have been made to produce a window construc
tion eliminating this troublesome feature, it is
Each wood weatherstrip 20 is made in two
parts, each of a length substantially equal to the30 height of the sash. To install the lower sash the
not known that any practical construction has
ever been developed and placed upon the market.
lower sections of the wooden weatherstrips 2€! are
less window unit is provided, the only point of
sliding contact between the sash and frame be
ing the points where the metal linings 22 contact
with the wood weatherstrips 20.
first put in position in the grooves I8 of the jamb
and secured therein as by nails or the like. The
lower sash is then placed in the extreme upper
35 part of the frame and is slid down into place,
the lower sections of the wood weatherstrips 2|]
being received in the groo-ves of the sash.
The upper sections of the wood> weatherstrips
are then placed in position in the upper portions
40 of the grooves I8 and secured in place, the joints '
in the wood strips being hidden by »the sash.
The joint is thus not visible nor does it interfere
in `any way with the free movement of the sash'
in its movement upward and downward. '
It will be noted that the shape of the wood
weatherstrip renders it easily and readily in
stalled or removed if necessary.
This installa
tion is considerably more simple than when it is
necessary to force the weatherstrip in from the
50 top as is customary with the usual metal weather
strip in other constructions.
From the above it will be seen that a friction
The meeting rails 36 and 31 of the upper and 35.'
lower sashes respectively are tongued and grooved
together along their entire lengths as shown at
38 and 39, the tongue of each meeting rail en
gaging a similarly shaped groove in the other rail
so that in the closed position of the two sashes
the joint between the edges of the sashes is air~
tight and prevents inñltration of dust or dirt
and the two sashes are securely locked together
to prevent rattling noises as well as warpage of
either sash. By providing tapered tongues and 45
grooves as illustrated, the two sashes are drawn
tightly together when in the closed position as
Very clearly illustrated in Fig, 1.
The head casing and water table combined is
preferably constructed in one piece as indicated 50
at 4D and provided with the upwardly disposed
The upper sash is installed in the same manner
tapered rib 4I over which the lap siding, shingles
as above described relative to the lower sash.
The wood weatherstrip has distinct advantages
or the like may be mounted. The lower end of
the combined head casing and water table is
rabbeted as at 42 to receive the upper end of the
side casing 43. This construction saves labor and
material. The head casing is made of thicker
55 over the usual metal construction as it is inex
pensive and can be cut to any length quickly and
easily, thus making it unnecessary to carry a
great variety of different lengths in stock.
The head jamb I9 is provided with a similar
60 wood weatherstrip 26 of hexangular form secured
within a tapered groove 2l `and adapted to be
material than the side casing, thus forming a
hidden joint which cannot dry out and show a
crack as is often the case with present construc
tions. It also projects out farther than the side
casing, forming a Water drip and the water can
not run into the joint because of the rabbet.
As is well known, one of the diflicuities encoun
received in a similar groove 28 in the upper edge
of the top rail 29 of the upper sash indicated
generally at 3U when the upper sash is in the
65 raised or normal position so as to prevent air
leakage or infiltration of dirt or dust at this
tered by architects, contractors and constructors
of houses and buildings of various kinds, is to
render the house or building air-tight, or to insu
Although the sashes may be hung upon the
usual sash cords with weights, the window is illus
late it against the inñltration of cold air, wind,
soot, dirt and dust through small openings and
70 trated as provided with a sash balance such as is
now coming into general use. Although any form
of sash balance may be used, the sash balance
known to the trade as the unique balance is pre
ferred. These sash balances are located in
75 grooves 3| provided for the purpose in the side
crevices. This is particularly difficult to accom
plish at the windows which are generally con
structed with sashes arranged to slide up and
Various means have been devised in the past
in an attempt to accomplish the desired result,
such as the use of so called weatherstripping de
vices, consisting of w‘ood or metal strips in com
bination with compressible felt pads or the like
which are tacked or nailed against the junction
between the stationary and slidable portions of
the window in an effort to provide an air-tight
joint. It has been particularly difficult to suc
cessfully apply these’well known weatherstripping
means to that section of the window comprising
the junction between the upper and lower sashes
of the window, commonly called the meeting rail.
ing parts of the window provide a double-hung
two-light window of improved construction which
renders the joint between the lower edge of the
top sash and the upper edge of the bottom sash
effectively air-tight in the closed position of the
two sashes, thus eliminating the necessity of any
auxiliary weatherprooñng means at this joint as
well as preventing warping of the meeting rails
and objectionable rattling noises.
I claim:
1. A weatherproof window structure including
Various means have been devised to render this ` side jambs having tapered grooves therein, a win
junction air-tight when the Windows are in their
closed position, such as by overlapping moldings
15 or by having the meeting rails tapered along their
adjoining surfaces. It has been found, however,
dow sash having tapered grooves in its side edges,
oppositely tapered, wood weatherstrips fixed in
the grooves in the side jambs and extended into
the grooves inthe sash, and substantially U
that such devices are generally ineffective due to shape resilient lining strips secured in the grooves
the relatively short path through which the leak -in said sash and frictionally engaging the tapered
age of air can take place and they become totally sides of said weatherstrips.
2. A weatherproof Window structure including 20
20 inoperative upon any slight warping which usual
side jambs having tapered grooves therein, a win
ly occurs in the meeting rails.
dow sash having tapered grooves in its side edges
It will be seen that the present invention over
comes the diñiculties encountered inprior means of greater width than the grooves in the side
or device-s to effectively insulate or render air
25 tight the joint between the meeting rails of the
twio sashes when they are in closed position, by
providing the sashes with a new and novel design
of meeting rail having interengaging tongued and
grooved parts along their entire Width. 'I'hese
30 improved meeting rails can be manufactured eco
nomically and when assembled with the cooperat
jambs, oppositely tapered, wood weatherstrips
fixed in the grooves in the side jambs and extend- ~
ed into the grooves in the sash, and substan
tially U-shape resilient lining strips secured in
the grooves in said sash and frictionaliy engaging
the tapered sides of said weatherstrip.
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