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Патент USA US2108137

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Feb. 35, i938.
Filed April 3.8, 1936
„l. /.
Patented Feb. 15, 1938
Philip R. Oftedal and Donald G. Kingsley,
Chicago, Ill.
Application April 18, 1936, Serial No. 75,157
8 Claims. (Cl. 2li-64)
The invention relates generally to thresholds,
and more particularly to such devices intended
primarily for use on exterior or outside door
openings and which are adapted to cooperate with
a weatherstrip to provide an effective seal against
the elements.
An important object of the present inven
tion is to provide a new and improved threshold
of this character which in a relatively simple
lil and economically produced structure embodiesI
water-drainage and sealing facilities whereby in»
stallation is facilitated, proper operation insured,
and deterioration of the threshold and adjacent
structure prevented.
Another object is to provide a new and im
proved threshold oi this character wherein the
ultimate water-discharge openings are so located
and positioned as to insure proper drainage and
prevent clogging of the openings.
A further object of the invention is to provide
such a threshold embodying water-drainage
facilities constructed and arranged to permit
callring under the front or outside edge of the
threshold throughout the entire width of the
door opening.
Another object is to provide a threshold of this
type constructed to drain efficiently and still pre
vent or retard the entrance of wind or water
through the drain passages.
tread surfaces are provided.
Thus an upper `
tread wall 22 slopes upwardly and inwardly from
the outer supporting flange 2l to merge, beneath
the normal door position, with a relatively ñat
top tread wall 23. Outwardly, that is to the
left in Fig. l, of the inner edge of the top ‘tread
23 is a substantially vertical supporting web '2li
extending downwardly to merge with an auxiliary
supporting flange 25, thereby providing an in“
. Another object is to provide such a threshold
wardly extending' ledge 23a for cooperation with ,
a weatherstrip 2S secured along the` lower edge
of the door to provide a relatively tight joint be
tween the door and the threshold. Between the
web» 2d and the inner supporting flange 2li is an
upwardly and inwardly sloping wall 27 which
merges with the flange'llß inwardly of and just OG 5
below the lower inner edge of a depending lip 28
of the door I l. Thus'the wall 2l and the web
24 define a trough 29 which receives any water
which may be driven, as by excessive wind,
around the edge of the ledge 232L and past the U
reversely and outwardly bent lower edge of the
.. Other objects and advantages will become ap
Generally considered, the threshold i9 is of
uniform cross section throughout its entire
length, and provides downwardly extending sup=`
porting flanges 2i) and 2l along its inner and
outer edges, while between these flanges suitable
-constructed to embody the entire water-drain
age system in a unitary structure whereby to
facilitate and insure proper installation.
In the embodiment chosen for disclosure here
in the invention is embodied in a threshold lil,
preferably formed by extrusion from a metal such
as brass, and mounted in a door opening so as
to overlie and conceal a joint li formed between 5
an inner` wood floor l2 and an outside composi
tion or concrete floor i3, the threshold Ill having
an inner edge l# and an outside edge l5 overlying
the floors I2 and i3 respectively.
At its ends, the threshold is associated in any
preferred manner with door jambs lli (only one
shown in Fig. 3), and a door Il is conventionally
mounted on one of the jambs I6 for swinging
movement inwardly over the inner edge lil of the
parent from the following description, taken in
connection with the accompanying drawing, in
Fig. l is an enlarged transverse sectional view
showing-in an installed position, a threshold em
..40 bodying the features of the invention, the sec
tion being taken along the line i-l of Fig. 2.
Fig. 2 is a reduced fragmental plan section
taken along the line 2~-2 of Fig. l.
weather strip 25.
Fig. 3 is a reduced fragmental plan View of one
end of the threshold shown inA association with
In accordance with the present invention the
threshold it is provided with means to insure-
the door jamb.
proper drainage of the water from the trough 2d,
For purposes of disclosure we have illustrated
and this means is preferably so arranged and
in the drawing and will hereinafter describe in
detail the preferred embodiment of the inven~
tion, with the understanding that we do not in
tend to limiteur invention to the particular con
constructed as to facilitate installation, retard
entrance of wind through the drainage means,
and prevent clogging of the drainage passages,
while permitting calking of both edges of the
struction shown, it being contemplated that vari
ous changes may be made by those skilled in the
art without >departing from the spirit and scope
of, the-appended claims.
In accomplishing these ends,> one or more
weepholes 3U are provided in the web 2d through
which water may drain from the trough 29, and
means is provided for conducting such water to
the outer edge of the threshold. As herein shown,
this means for conducting the water outwardly
from the weep-holes 30 is formed integrally with
the web 24 and the flange 25, and comprises a
devious yet certain drainage path, prevents ap
preciable wind passage into the interior of the
dwelling. Since the outer edge of the threshold
may be properly calked throughout its entire
length, there is no admission of water beneath
has a rounded, downwardly and outwardly slop
ing surface 33 (Fig. l) so that water discharged
from the ports 32 will drain down onto the outer
floor i3.
With this elevated and inwardly spaced loca
tion of the ports 32 the possibility of clogging of
the ports is avoided and continued satisfactory
operation is assured. In addition, the lower outer
edge of the outer supporting flange 2i is con
tinuous and unbroken throughout the entire ex
tent of the threshold so that suitable calking 34
may be employed along the entire outer edge,
as well as beneath the inner and auxiliary sup
porting flanges 20 and 25. A downwardly fac
ing groove Zia may be provided in the flange 2|
to receive the calking 34, and the desired pres
sure or compression is obtained through the tight
ening of mounting screws 34a (not shown in Fig.
l), a plurality of such screws being provided
throughout the length of the threshold. Pref
erably these screws pass through the drainage
plate 3| with a relatively tight ñt so as to retain
all water on the upper surface of the plate 3|.
It will be evident that the provision of the
drainage means as an integral or unitary por»
tion of the threshold simpliiles the problem of
mounting the threshold, and removes the per
sonal factor which so often results in improper
drainage of the parts of the structure, and sub~
sequent deterioration of the various elements of
`the structure involved.
As a practical matter, several weepholes 3Q and
discharge ports 32 are provided at longitudinally
may be readily installed to secure proper and
continued drainage, and which, by reason of the
drain plate 3|, so positioned as to slope for
wardly and downwardly from beneath the weep
holes 3B to the juncture of the tread 22 and the
outer flange 2|. With this form and arrange
ment the outermost edge of the drain plate 3| is
elevated a substantial distance above the floor
level, and one or more outwardly sloping dis
charge ports 32 are provided in a vertical web
22a (Fig. 2) which co-nnects the tread 22 Vwith
the supporting flange 2i. Preferably the flange
2i extends outwardly beyond the web 22a and
From the foregoing it will be apparent that
the present invention provides a threshold 'which
spaced points in each threshold, and provision
is made in the present device to prevent the
entrance of wind through the drainage system.
the threshold, and as a consequence, deteriora
age system are so protected and positioned as to
prevent clogging, and hence continued satisfac
tory functioning is assured.
1. A threshold comprising an elongated body
having inner and outer supporting flanges ex
tending downwardly along its opposite edges, and
providing a longitudinally extending upwardly 20
facing tro-ugh adjacent to said inner flange, a
water discharge port formed in said body adja
ïcent to said outer flange but spaced a substan
tial distance above the lower edge of said flange,
said port being located at a lower level than the 25
bottom of said trough, and drainage means pro
viding a devious outwardly sloping drainage path
from said trough to said port.
2. A threshold comprising an elongated body
providing supporting flanges along the inner and 30
outer edges thereof adapted to rest on the floor
when said body is put in plane, and having a
longitudinal upwardly facing trough adjacent to
said inner flange, a water discharge port formed
in said body adjacent to said outer flange but 85
spaced substantially above and horizontally in
wardly from the lowermost outer edge of said
outer flange, and drainage means forming a
drainage path from said trough to said port,
said body providing an outwardly and down 40
wardly sloping surface outwardly of said port to
receive water from said port and drain the water
outwardly and downwardly from said port onto
said floor.
3. A threshold comprising an elongated body,
one edge of which is adapted to constitute the
outer edge and the other edge of which is adapt
ed to constitute the inner edge of the threshold,
said body being formed from metal to provide
downwardly projecting supporting flanges ex 50
be simply provided by an angle bar 35 extending
throughout the length of the threshold and
wedged between the forwardly converging op
posed surfaces of the tread 22 and the drain
to provide a drain trough, and means in per
60 plate 3|.
Thus in the present form the angle
of the bar 35 is engaged with the tread wall 22
while the edges of the two flanges of the bar,
identified as 35a and 35h, engage the plate 3|.
The bar 35 by this arrangement is firmly posi
65 tioned and acts as a double baille, small slots or
notches 36 and Sl being provided in the lower
edges of the flanges 35a and 35b so as to form
drain passages. Preferably the notches 36 and
31 are staggered longitudinally of the bar 35 (as
7.0 shown in Fig. 2) and the outer notches 36 are
staggered with respect to the discharge ports 32,
thereby providing an increased bailling effect for
retarding wind passage, while permitting rela
tively free ilow of water along the plate 3| toward
75 its ultimate point of discharge.
We claim as our invention:
tending along said inner and outer edges of said
body and adapted to rest upon the mounting
surface, and an upper tread wall extending be
tween said bearing flanges, said tread wall having
a surface sloping gradually upwardly from said
outer edge to merge with a horizontal portion
spaced from said inner edge, said tread wall, in
wardly of said horizontal portion, being formed
To this end baille means is preferably provided
in the space between the treads 22 and 23 and
the drainage plate 3|. Such baille means may
tion of the floor structure is prevented. More
over, the ultimate discharge ports of the drain
manently ñxed relation to said body forming a
drain passage communicating with said trough
to receive water therefrom and discharging
through said body at a point elevated above the
lower extremity of the outer supporting flange,
whereby to prevent the clogging of the discharge 65
end of said passage by dust as such dust is swept
along the floor at the line of juncture of the
floor with said outer supporting flange.
4. A threshold having an elongated body with
an upper tread wall and downwardly extending 70
supporting flanges along opposite edges and an
upwardly facing trough along one edge, the flange
along the other edge having a continuous un
broken lower- outer edge for Contact with the
iloor upon which it is mounted, and means 'pro`
viding a drain passage sloping from said trough
to a discharge port opening through said body
located at a substantial elevation above said lower
outer edge of the outer flange on said other edge,
whereby to avoid clogging of said discharge port
by dust in the sweeping of such dust along the
line of juncture of the ñoor with said outer sup
porting ilange.
5. A threshold of the character described com
10 prising an elongated body having an upper tread
wall and inner and outer supporting flanges eX
tending downwardly along opposite edges, said
body having an upwardly facing trough adja
site edges of said body, a drain plate sloping
downwardly from beneath said trough to the
iiange at the other edge of said body, said trough
having a weephole discharging onto said plate and
said body having a drain port from said plate
to the outside of the body adjacent to said other
edge but elevated above the lower outermost edge
of said other edge, and baille means between said
upper tread and said drain plate operable to re 10
tard the passage of wind from said port to said
outer ilange, said body providing drain openings
8. A threshold of the character described com
prising an elongated body member providing a
broad upwardly facing tread portion with a 15
from said trough onto said plate and from above
to constitute the inner edge when installed on
cent to said inner flange and a drain plate slop
15 ing downwardly from beneath said trough to the
said plate through the body above and adjacent
to the lowermost edge of the outer supporting
20 flange,
and an angle bar having staggered
notches in the edges of its ilanges and wedged
longitudinally of the body between said tread
wall and said plate with the edges of both of its
flanges abutting said plate.
6. A threshold comprising an elongated body
wardly extending supporting flanges along oppo
having inner and outer downwardly extending
supporting flanges along its inner and outer
edges, and an upwardly facing trough along its
inner edge, a drainage plate formed integrally
with said body yand sloping outwardly and down
wardly from below said trough to a juncture with
said outer supporting flange, said body having
a weephole to drain water from said trough onto
said drain plate, and having a discharge port
formed in the outer portion of the body a sub
stantial distance above the lowermost extremity
of said outer flange so as to drain water from
said plate.
7. A threshold comprising, in combination, an
40 elongated body having an upper trea-d wall and
an upwardly facing trough along one edge, down
trough along one edge, said edge being adapted
a ñoor, said body member having a downwardly
extending supporting means adjacent said inner
edge adapted to rest on such a ñoor so as to sup
port said trough a substantial distance above the
floor, and a continuous downwardly extending
bearing ñange along the other edge of said body
member, said bearing flange having a continu~
ous straight lower outer edge adapted to rest 25
upon the floor, and having a downwardly facing
groove of substantial width located horizontally
inwardly from said straight edge and adapted
to receive plastic calking material to seal the
joint between said flange and the floor, said 30
flange having a weephole formed therein spaced
upwardly a substantial distance -above said lower
outer edge of said flange, and drainage means
for receiving and draining water from said trough
outwardly to disch-arge such water from said 35
weephole, said drainage means, above said calk
ing groove, being formed to convey said water
to said weephole at a level above the uppermost
part of said groove.
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