Window-Shade Roller Page: 3 of 3
[1], 2 p. : ill. ; 23 cm.View a full description of this patent.
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1,0O9,584
be turned over upon itself and secured in
this position, thus preventing its escape
from the rod.
Upon the under side of the casing 6
5 there is provided a slot 21, through which
the window shade passes in winding on or
off of the rod 15.
Upon one side of the two-part rod
there is mounted a coiled spring, which has
10 one of its extremities attached to the wall
of the casing. When the curtain is with-
-rawn from its rod, the rotation of the latter
thus produced, winds up the spring 22 and
stores sufficient energy therein to return the
15 window shade to its raised position when re-
leased. In order that the shade may be held
at any elevation, so as to limit the amount of
light entering through the window, a pawl-
and-ratchet mechanism is mounted upon the
20 other end of the two-part rod, consisting
of a ratchet wheel 23 and a pawl 24. When
the window shade is held stationary, the
pawl 24 will engage the teeth of the wheel
and prevent rotation of the rod. As the
25 window shade is drawn clown the pawl will
slip over the teeth of the ratchet and will
offer no obstruction to the rotation of the
wheel. Also if the window shade is al-
lowed to ascend rapidly, the wheel 23 will
30 rotate at such a rate that the pawl cannot
engage the teeth thereof, so that there will
be no obstruction to the raising of the cur-
tain. But as soon as the upward motion of
the curtain is retarded, as when the proper
position of adjustment is reached, the pawl
will engage the teeth of the wheel 23, and
hold the window shade in the desired posi-
tion. Cap or end pieces 25 may be provided Ito close the extremities of the casing,, and
protect the mechanism from dust and dirt. 40
The above described window shade not
only permits regulation of the amount of
light entering below the shade, but also per-
mits variation in the light entering above
the shade, so that, if desired, the upper half 45
of the window may be left unscreened, while
the lower part will be screened, and prevent
the public from looking into a room. The
casing 6 will serve to prevent dust and dirt
settling upon the window shade, and will 50
add to the length of time for which the lat-
ter may be used.
What I claim is:
In a device of the character described, the
combination with a window frame, of a ver- 55
tical channeled rod mounted on each side
thereof, a horizontal guiding strip adapted
to engage each of said vertical rods and re-
ciprocate in the channels thereof, said guid-
ing strips being each provided with a longi- 60
tudinal slot, a cylindrical casing carrying a
window. shade connected to said guiding
strips, the connections between said cylin-
drical casing and said guiding strips being
adjustable within said longitudinal slots, 65
and a system of cords and pulleys for rais-
ing and lowering the aforesaid cylindrical
casing.
In testimony whereof I have signed my
name to this specification in the presence of 70
two subscribing witnesses.
EMIL F. SCHINDLER.
Witnesses:
L. MORRIS,
J. S. MURRAY.Copies of this patent may be obtained for five cents each, by addressing the " Commissioner of Patents,
Washington, D. C."52
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Reference the current page of this Patent.
Schindler, Emil F. Window-Shade Roller, patent, August 5, 1913; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth853888/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.