Improvements in Venetian Blinds.
Year: 1887

page_text: Date of Application, 21st Feb., 1887.
Complete Left, 31st Mar., 1887.
Complete Accepted, 3rd May, 1887.
Improvements in Venetian Blinds.
I, CARL WILHELM FUCHS of Pforzheim in Baden, Germany do hereby declare the
nature of this invention to be as follows:-
:-
The improvements hereinafter described relate to a venetian blind, the reeds of
which are moved automatically, when the blind is let down. This result is gained by
the employment of a vertical oscillating rod, provided with a grooved box and with
nozzles; all these mechanisms are destined to turn or to move the reeds automatically.
The arrangement of the blind is the following:
The reeds of the blind are attached to a pitch-chain, which may be rolled up in the
usual manner. The reeds are arranged movable at this chain and each of the reeds
possesses at both sides a pivot, which slides up and down in the groove of the guide-
mouldings of the window, when the blind is moved up and down.
In the guide-mouldings of the window is arranged a vertical bar or rod fitted in
sockets so that it can turn or oscillate..
This bar is provided with teeth in distances corresponding to the distances of the
fulcrums of the reeds; it has besides at its upper end a case or box provided with a
screw-like groove, destined to enclose the lateral pivot of the most upper reed; this
pivot is longer than the pivots of the other reeds.
When the blind is being let down the pivots of the reeds slide in the grooves,
without touching the box of the vertical bar, till the lengthened pivot of the last reed
slips into the screw-like groove of the vertical bar.
But as soon as that occurs the vertical bar is turned by means of the long pivot and
of the screw-like groove by 90°. The teeth on the vertical bar are likewise turned
thereby and, coming under the pivots of the reeds, serve as rests for them and the
reeds are hold at their end and brought out of their inclined position.

page_text: The reeds gain a horizontal position and consequently more light and air can
penetrate through them.
When the blind is pulled up again the uppermost reed of the blind moves with its
lengthened pivot out of the box with its screw-like groove and the vertical bar or rod
connected with it is moved back into its former position.
The teeth of the vertical bar or rod move back with the latter of course, and the
reeds are deprived of their rests. They fall down into their former inclined positions
and can be wound up on the upper rod when the blind is pulled up still further.
The pivots of the reeds may consist out of rollers which make them slide easily and
noiselessly in the guide-mouldings when the blind is pulled up or down.
Berlin, dated the 18th day of February 1887.

page_text: I, CARL WILHELM FUCHS of Pforzheim in Baden, Germany, do hereby declare
the nature of this invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
The improvements hereinafter described relate to a venetian blind, the reeds of
which are moved automatically, when the blind is let down. This result is obtained
by the employment of a vertical oscillating rod, provided with a grooved box and
with nozzles; the purpose of all these mechanisms is to make the reeds turn or move
automatically.
The arrangement of the blind is the following: The reeds of the blind are attached
to a pitch-chain, which may be rolled up in the usual manner.
The reeds are
arranged movable on this chain and each of them is provided at both sides with a
pivot which slides up and down in the groove of the guide-mouldings of the window,
when the blind is moved up and down.
In the guide mouldings of the window is arranged a vertical bar or rod, fitted in
sockets so that it can turn or oscillate. This bar is provided with teeth at intervals
corresponding with the distances of the fulcrums of the reeds; it has besides on its
upper end a case or box provided with a screw-like groove, in order to enclose the
lateral pivot of the uppermost reed; this pivot is longer than the pivots of the other
reeds.
When the blind is let down the pivots of the reeds slide in the grooves without
touching the box of the vertical bar, till the lengthened pivot of the last reed slips into
the screw-like groove of the vertical bar.
But as soon as that occurs the vertical bar is turned by means of the long pivot and
the screw-like groove by 90°. The teeth on the vertical bar are likewise turned
thereby and, coming under the pivots of the reeds, serve as rests for them and the
reeds being held fast at their ends are raised and assume a horizontal position.
The reeds having thus been brought into a horizontal position, they allow more
light and air to penetrate into them.
When the blind is pulled up again the uppermost reed of the blind moves with its
lengthened pivot out of the box with its screw-like groove and the vertical bar or rod
connected with it is moved back into its former position. The teeth of the vertical
bar or rod move back with the latter of course, and the reeds are deprived at their
rests. They fall down into their former inclined position and can be wound up on the
upper rod when the blind is pulled up still farther.
The pivots of the reeds may consist in rollers which make them slide easily and
noiselessly in the guide-mouldings when the blind is pulled up or down.

page_text: view of the venetian blind with the box or case provided with the screw-like groove.
Fig. 4 is likewise a front view of the blind, but in this case the slats are raised by the
turning of the groove. Figs. 5, 6, 7 & 8 represent different cross-sections through
the venetian blind.
The slats
a is the pitch-chain to which the slats i are suspended by means of the turning
pins a¹.
of the blind are provided on their side-surfaces with pivots c
(fig. 3) and the uppermost slat has a lengthened pivot el. The window-frame ris
shutt off by a cover b, (fig. 6) On one side of the pivots in the window-frame ŕ is a
vertical shaft d. On the upper end of this shaft d is a box g which is provided with
a screw-like groove h.. In addition to this the shaft d is provided at regular intervals
with the projections f.
The pivots c of the slats i consist in a screw pin c k (fig. 8), provided with a roller
to decrease the friction of the slats against the vertical moulding b.
When the blind is let down the slats i are in the closed position shown in fig. 1.
In letting down the blind, the pivots c of the slats i move unimpeded past the box g.
But when the blind is completely let down, the lengthened pin c¹ enters the groove h
of the box and as it descends vertically with the blind and slides in the groove n at
the same time, it must turn the box g with the groove h. The shaft a which is
connected with the box g is likewise turned thereby and comes into the position shown
in fig. 4.
When the blind is raised, the reeds are brought out of their horizontal position and
hang vertically whereby the box g is turned back and resumes its former position.
Having now particularly described and ascertained the nature of said invention
and in what manner the same is to be performed, I declare that what I claim is:
с
A venetian blind the reeds of which are provided with pins ce¹ in combination with
the oscillating shaft d, box g with the screw-like groove h, for the purpose specified.
Dated this 98th day of March 1887