Window-Shade Page: 3 of 3
[1], 2 p. : ill. ; 23 cm.View a full description of this patent.
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875,129
lower pair are preferably smaller in diameter
than the other rollers, so that the cords and
curtains will operate in different planes.
Whenever it is desirable to admit light or
5 air at the upper portion of the window, the
operating cords of the two curtains are ma-1
nipulated so as to draw both curtains over
the upper pair of rollers and to a position in-
termediate the end of the window, as shown
10 in Figs. 1 and 2. By drawing one of the cur-
tains upwardly until its upper edge reaches
the upper pair of rollers and lowering the
other curtain until its lower edge reaches the
lower set of rollers, the window will be com-
15 pletely closed, the proximate edges of the
curtains overlapping at about the center of
the window. Should it be desirable to ad-
mit considerable light or air, it is only neces-
sary to adjust the curtains to the position
20 shown in Fig. 2, that is to say, both curtains
are passed over the respective upper rollers
until their opposite edges are even, the cur-
tains then covering a portion of the window
opening equivalent approximately to one-
25 half of their length.
In practice, it may be found desirable or
necessary to provide a suitable device for re-
taining the curtains in the different adjusted
positions, a locking device of this character
30 being shown in the present instance which
embodies a bracket 17 rigidly secured to the
window casing and having a spring operated
plunger 18 which is arranged to cooperate
with the two operating cords at one side of
35 the shade, the pressure exerted by the plun-
ger serving to bind the cords sufficiently to
effectually prevent movement of the cur-
tains. It may also be advantageous in some
cases to provide housings for the lower por-
40 tions of the operating cords, the housing ex-
tending from the lower pairs of rollers at the
opposite sides of the window casing upwardly
toward the center of the window, such a con-
struction protecting the cords from breakage
45 and insuring a neat appearance.
If desired means such as shown in Fig. 6
may be employed for securing the shades
against movement. This device consists of
a block 19 having openings 20 extending
50 therethrough and through which the cords
are designed to extend. Set screws 21 areprovided for binding the cords within the
openings as shown.
What is claimed is:-
1. A device of the character described com- 55
prising inner and outer endless belts, each
belt comprising a curtain and a flexible con-
nection between the ends of the curtain, said
outer belt being extended around the inner
curtain and each belt being movable in the 60
direction of its length, and .revoluble means
for supporting the belt to permit independ-
ent movement thereof.
2. A window shade embodying a pair of
upper curtain guiding rollers, pairs of inde- 65
pendently operable cords passing over the
said rollers, a set of lower rollers adapted to
cooperate with the lower portions of the op-
erating cords, and a flexible curtain carried
by each pair of operating cords. 70
3. A window shade embodying a pair of
upper and lower curtain guiding rollers jour-
naled one above the other, a pair of brackets
adapted to be secured to the lower portion of
the window casing and each having a pair of 75
upper and lower cord guiding rollers jour-
naled therein, a pair of operating cords pass-
ing over the upper curtain guiding roller and
over the lower pair of cord guiding rollers, a
second pair of cords passing over the lower 80
curtain guiding roller and cooperating with
the upper pair of cord guiding rollers, and a
flexible curtain carried by each pair of oper-
ating cords.
4. A window shade embodying a pair of 85
upper curtain guiding rollers, pairs of inde-
pendently operable cords passing over the
said rollers, a set of lower rollers adapted to
cooperate with the lower portions of the op-
erating cords, and a flexible curtain carried 90
by each pair of operating cords, and a lock-
ing device adapted to cooperate with the op-
erating cords to secure them in fixed relation
and prevent movement of the curtains.
In testimony that I claim the foregoing as 95
my own, I have hereto affixed my signature
in the presence of two witnesses.
ERRETT B. STEPHENSON.
Witnesses:
W. F. SnIPP,
W. M. BURGESS.2
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Reference the current page of this Patent.
Stephenson, Errett B. Window-Shade, patent, December 31, 1907; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth514901/m1/3/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.