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Патент USA US2128489

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Aug. 30, 1938.
2,128,489
A. LANG
WINDOW SCREEN
Filed April 18, 1956
. F. M1.
H
INVENTOR.
‘
'
ATTORNEY
Patented Aug. 30, 1938
' 2,128,489‘
UNITED STATES PATENT OFFICE
. 2,128,489
wmnow some»:
I
Albert Lang, Berkeley, (lalif.
Application April 1a, 1936, Serial No. 15,133
'lClalms.
(Cl. 156-14)
are required to complete the screen, the cost
thereof in both labor and materials is greatly
reduced.
The present invention relates to window
screens and more particularly to an improvement
in metallic screens of the type having a channel
with a screen fabric retaining means disposed
therein to secure the screen fabric upon the
frame.
I
An object of the invention is to provide‘a new
and novel metallic frame for window screens
which may be formed from a single strip of metal '
with but one joint therein.
Another object of the invention is to'provide
a metallic window screen of light construction
having inherent screen tension retaining means.
Another object of the invention is to provide
a new and novel form of means for making a
joint in metallic screens of the type having a
screen fabric retaining channel and a wedging
means extending around one side thereof.
A further object of the invention is to provide
:1) a new and novel form of screen securing means
For a better understanding of the invention
reference should be had to the accompanying a
drawing, wherein there is shown by way] of illus
tration and not of limitation, preferred embodi
ments thereof.
'
'
In the drawing;
Figure‘ 1 is a fragmentary front view taken at 10
the comer of a window screen showing the con
struction thereof,
Figure 2 is a fragmentary view of the back of a
screen, also taken at a corner, showing the posi- -
tion of the screen retaining means and the man
ner of mitre cutting the frame forming strip for
the corner bend,
‘
I
.
Figures 3 and 4 are fragmentary perspective
views showing an improved means for securing
together the abutting ends of a finished screen
for a screen frame of the type having a screen
frame,
fabric receiving channel extending around one
side thereof.
In the prior art there are a number of examples
ing a screen constructed in accordance with the
present‘ invention secured upon the sash of- a
of metallic screen frames which are formed by
folding a strip of metal to provide a channel
along one side thereof into which the screen
fabric and a screen retaining rod may be dis
posed. Examples of this construction are shown
30 in William J Baker Patent No. 1,004,721, dated
October 3, 1911; Clifford Traut Patent No.
1,18'7,402, dated June 13, 1916; and Henry Higgin
Patent No. 1,248,858, dated December 4, 1917. In
each of these patents the frames are formed by
cutting the .frame forming strips into four pieces
and joining the corners by welding or other means.
As disclosed in each of the above patents it is
also necessary with the construction illustrated
to provide a right angle reinforcing corner piece..
'As distinguished'from the constructions illus
40
trated in the above cited patents, the present
invention provides a screen which can be formed
with'a continuous channel extending‘ there
-)
4
around from a continuous strip of metal with
but one joint in the completed frame. The pres
ent invention also embodies the further novel
' feature of a .screen securing rod which, in addi
tion to securing the screen fabric upon the frame,
.also imparts improved screen tensioning charac
teristics-into the completed screen‘ frame. This
makes possible the formation of a screen frame
of light construction which can be made of greater
dimensions than has heretofore been possible with
a screen of this character, and at the same time,
55 since a minimum of parts and assembly operations
.
I
Figure 5 is av fragmentary sectional view show
25
metal casement window, and
Figures 6, 7, 8, 9 and 10 show various forms
of the improved screen securing and tensioning
means contemplated by this invention.
As is clearly shown in Figures 1 and 2 of the
drawing, the screen constructed in accordance 30
with the present invention comprises a sheet
metal frame member I0 upon which a screen
fabric II is secured by means of a-securing rod
I2. The securing rod i2 is preferably of one con
tinuous piece with right angle bends at its cor
ners.
35
This rod I! may consist of a number of
separate rods providing the separate pieces in
clude a substantially right angle bend which ex
tends around each corner of the frame 10. The
frame Ill is formed by folding a metal strip of 40
cold drawn steel along its longitudinal axis so as
to provide a channel in one side thereof. This
channel, designated by the numeral i3, in Figure
2 of the drawing, is of a width and depth su?i
cient to accommodate the edge of the screen
fabric II and the securing rod l2. The channel
I3 is formed by folding the frame forming strip
so that it will have an inside ?ange l4 and an -
outside ?ange I 5. For stiffness, the frame l0
also has an outwardly extending flange l6 which
is adapted to engage the surface upon which the
screen is to be secured. In forming the frame
ill the metal strip will be ?rst folded in the above
manner as a continuous piece and subsequently
four mitre cuts I‘! will be made therein by any 55
2,128,489
suitable means.
These mitre cuts will extend
through the inside ?ange It and the bottom
'portion of the channel I3 at the desired points to
the frame it between its corners and exert an
outward force upon the frame which will coun
teract any inward pull or tension that is imparted
form the corners of the frame III. In connection to the screen fabric by a stretching thereof during
with each mitre cut i1 it is to be noted that the the assembly operation. This latter feature of >
?ange l5 and the ?ange it of the screen frame I the invention may be applied to the screen frame
iii are left intact for bending and consequently in a number of different forms and will now be
no welding or other form of joint is required at described in connection with the remaining ?g
the corner of the screen frame, as is the case in
all prior art metal screens.
After the frame forming strip has been folded
longitudinally and provided with the four mitre
cuts I‘I corresponding in location to the corners
of the screen and ?nally bent up into rectangu
15 lar form, it will provide a frame having a con
tinuous channel l3 extending entirely around one
ures of the drawing.
.
.
Broadly, the novelty of thisimproved screen 10
securing means, in conjunction with the rela
tively light frame i0, consists in bowing the '
screen fabric retaining rod I! so that it will pos
sess an inherent outward bias when assembled in
the frame l2 and thus exert a force upon the 15
frame Hi which will maintain the screen fabric
taut between the corners of the frame and at the
side thereof into which the securing means or
rod l2 may be pressed over the edges of the screen
same time reinforce the frame at these points
fabric ll. After the screen frame ID has been
and at the corners.
20 formed, and before the screen fabric l I is applied -
thereto, it is desirable to secure together the
meeting ends of the frame forming strip where
they meet between two of the corners. This can
be accomplished in a number of ways. For ex
25 ample, the ends of the frame forming strip may
be butt-welded.
In Figures 3 and 4 of the drawing. there is
shown in detail an improved form of securing
means for the abutting ends of the frame form
30 ing strip. As here illustrated, the abutting ends '
of the frame it are held in alignment and se
cured together by means of a- clip l8 which ex
tends around the outside of the channel i3
formed in the frame It. This clip I8 has an out
As shown in Figure 6 of the drawing, the screen 20
retaining rod I2 is shown as formed of a‘ single
piece of metal and with four substantially right
angle bends therein at properly located points.
Between these right angle bends the rod I2 is
provided with a slight outward bowing so that 25
when released the rod will take substantially the
position illustrated in this ?gure of the drawing.
With the rod formed in this manner, it will be
seen that when it is squared by being placed into
the channel I3 of a corresponding frame, the 30
sides thereof will have an inherent outward bias
which will impart a corresponding stiffness to the
frame Ill between its corners.
In Figure 7' of the drawing, the securing rod is
35 wardly extending ?ange l9 which provides rigid ' ?rst formed as last above described, and then
ity and it is secured upon the screen frame by squared and butt-welded at the meeting ends 26 35
a crimping 20' in the opposed sides thereof. This
crimping 20 extends into the side ?anges it and
if» of the channel I3. The crimping 20 is ac
40 complished by placing a suitable die within the
channel l3 and applying pressure through suit
able punches to the opposite outside surfaces of
the clip i8. After the clip i8 has been thus se
cured upon a ?nished frame, the screen fabric
45 H can be placed thereupon with its edges extend
ing over the channel l3 and secured in place
by pressing the securing rod l2 into the channel
I3 over the edges of the screen fabric.
In Figure 5 of the drawing, there is shown a
50
casement window frame 2| having an outswing:
of the rod 12, before it is inserted into its cooper
ating frame III.
In Figure 8 of the drawing, there is shown a
securing rod construction which is particularly
adapted to long narrow screens. As here shown,
the rod is formed with long sides 21 bowed out
wardly and the portions thereof corresponding to
the ends of the frame are left straight. This pro
vides a securing rod which will impart the addi
tional stiffness required along the long dimension 4,5
of the screen.
In Figure 9 of the drawing, there is shown a
modi?cation of the last described arrangement,
wherein two separate rods 28 and 29 are used.
In this embodiment the ends of the rods 28 and 50
ing sash 22 of the type to which the screen here
in described is particularly applicable. As here 29 extend lengthwise of the screen frame and are
shown, the ?ange l6 of the screen frame It rests normally disposed at a slight outward angle so
upon the'?ange surface of the casement frame ' that when they are pressed into the rectangular
frame channel IS, the ends thereof will exert an
55 2 l , and is there held by suitable clips. These clips
may take a number of forms. As shown, they outward force which will compensate for and 55
consist of two spaced upwardly extending clips counteract any inward force exerted upon the
23 behind which the bottom of the frame it! is side of the frame It by the screen fabric ‘I I, and
adapted to restyand at the top of the screen
as a result the screen .fabric will be held taut
60 there is a single centrally located clip 24 which
throughout the length of the screen after it has
been secured upon the frame II.
In Figure 10 of the drawing, there is showna
is secured upon the casement frame 2! by means
of a thumbscrew 25 so that it may be released
and rotated to permit removal and placement of
the screen over the window opening.
A comparison of the screen construction de
65
scribed and illustrated by this application with
the constructions illustrated by the above identi
?ed prior art. will show that the frame of the
present invention is considerably lighter than
70 any heretofore proposed and therefore in order
to provide against an inward bowing of the frame
l0 between its corners, by reason of any pull ex
erted thereupon by the screen fabric, the present
invention also contemplates a specially formed
75 screen fabric securing rod I! which will reinforce
further modi?cation of the latter arrangement,
wherein the securing rod is formed of four sepa
rate members 30, each of which extends around
one of the corners of the screen frame II. The
ends of the securing members 30 are normally
disposed at an outwardly extending angle slighty
greater than 90 degrees, so that when they are
pressed into the right angle channel upon the 70
frame l0, they will exert an outward force upon
the screen frame Ill intermediate its corners and
counteract any frame collapsing .force which '
might be exerted upon the frame by the screen
fabric.
'
3
2,128,489
While I hav , for the sake of clearness and in
order to disclose the invention so that the same
can be readily understood, described and illus
trated speci?c devices and arrangements, I de
4. In a metallic screen, the combination of a
sheet metal frame of rectangular outline having
a continuous groove formed in one side thereof,
a screen fabric disposed upon said frame with
its edges extending into said groove, and a con
sire to have it understood that this invention is
rod bent to normally conform to the
not limited to the speci?c means disclosed, but tinuous
groove in said frame and pressed into said groove
may be embodied in other ways that will suggest over
the edges of. said screen for securing the
themselves to persons skilled in the art. , It is
believed that this invention is new and it is de
10 sired to claim it so that all such changes as come
within the scope of the appended claims are to
be considered as part of this invention.
Having thus described my invention, what I
claim and desire to secure by Letters Patent is:
1. A metallic frame for window screens, com
15
prising a ribbon-like strip of metal folded lon
gitudinally to form a. groove of rectangular cross
section along one side thereof, said frame hav
ing corners formed by cutting a mitre through
20 said groove by cutting only the bottom and the
inner groove forming side of said strip and bend
ing the uncut portion of said strip at the other
wall of the groove at a right angle parallel to
the plane of said groove, said strip having four
25 mitre cuts and right angle bends formed inter
mediate its ends and having its ends abutting
between two of the corners to form the frame,
and a channel-like clip telescoping over the
abutting ends of the strip having its side walls
30 crimped into the outsides of the groove formed
in the frame.
‘
2. In a metallic screen, the combination of a
sheet metal frame of rectangular outline having
a continuous groove formed in one side thereof,
a screen fabric disposed upon said frame with its
edges extending into said groove, and a wedging
vmeans pressed into said groove over the edges
of said screen for securing the screen upon said
frame, said means having portions correspond
40 ing to the ends and sides of the screen bent
outwardly and producing an inherent outward
bias in said frame to compensate for the ten
sion exerted upon said frame between its corners
by the screen.
3. In a metallic screen, the combination of a
sheet metal frame of rectangular outline having
a continuous groove formed in one side thereof,
a screen fabric disposed upon saidframe with
its edges extending into said groove, and a wedg
ing means extending around each corner of the
frame and pressed into said groove over the edges.
of said screen for securing the screen upon said
frame, said wedging means having the portions
thereof between the four corners of the frame
55 bent outwardly and producing an inherent out
ward bias in said frame and maintaining the
screen fabric under tension between the corners
of the screen frame.
’
screen upon said frame, said rod having its cor
ner forming portions bent at substantially a right
angle and its remaining portions bowed outward
ly, whereby said" rod will produce an inherent
outward bias in the sides of the frame to coun
teract the tension exerted by the screen upon said
15
frame between its corners.
5. In a metallic screen, the combination of a
sheet metal frame of rectangular outline having
a continuous groove formed in one side there
of, a screen fabric disposed upon said frame with
its edges extending into said groove, and a rec-v
tangular ring adapted to conform to the groove
in said frame when pressed into said groove over
the edges of said screen fabric to secure the
‘screen upon said’ frame, said rectangular ring
having the portions thereof corresponding to the
sides of said screen bowed outwardly to pro
duce an inherent outward bias within the frame
and maintain the screen fabric under tension
between the sides of said frame.
6. In a metallic screen, the combination of a
sheet metal frame of rectangular outline having
a substantially channel-like section providing a
groove in one side thereof, the ends of said-frame
forming member being brought into abutting re
lation between two of the corners of its rectan
gular outline, and a channel-like clip secured ex
ternally upon the channel-like section of said
frame and overlapping the abutting ends of said
frame forming member, said clip being secured
to the ends of said frame forming member by
crimping the sides of said clip into the outside
walls of said channel-like section‘ in close prox
imity with the bottom of the groove formed
thereby.
'I. In a metal window screen of the type hav 45
ing a frame with a continuous, channel into
which the edges of a screen fabric are secured, a
screen fabric upon said frame, a screen fabric
securing means in said channel extending around
and reinforcing each corner of the screen frame
having portions which exert an outward force
upon the screen frame between its corners to
counteract the tension of the screen fabric at
the sides and ends of said frame.
65
ALBERT LANG.
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