An Improved Window Blind.
Year: 1897

page_text: Date of Application, 6th Aug., 1897-Accepted, 11th Sept., 1897
An Improved Window Blind.
I CARL KIRSCHSTEIN of 70 Koenigsberger Strasse Elbing in the province of
West. Prussia and German Empire, Farmer, 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 present invention relates to a window blind formed of cardboard.
In the accompanying drawing the object of the application is illustrated as
follows:-
Figure 1 is a view of the apparatus.
Figures 2 to 4 various details of the same.
Figures 5 to 7 the application of the same.
This invention has for its object to provide a blind for windows not possessed of
shutters, which will take the place of these, and serve as a protection against
persons looking in, also to prevent the sun from shining into the room in summer
whilst admitting a sufficiency of light as required, whilst in winter the blind will
serve as a protection against the cold and hinder the escape of heat from the room.
For the above purposes strong sheets of cardboard are made use of.
At the upper end of each sheet is rivetted a thin sheet iron binding a, consisting
of two iron angle pieces provided with hooks b. At suitable places in the window
frames eyelets ce are screwed in, which eyelets correspond to the hooks of the
blind. The cardboard blind is somewhat shorter than the window; two of the
eyelets cc are placed at the upper end of the window, whilst the other two e c
are placed at a height above the window sill corresponding to the height of the
blind. Consequently it is possible to cover the upper part of the window, by
suspending the blind from the upper hooks (see Figure 6) thus giving full protection
against the sun, whilst the room remains undarkened, or by hanging the blind
on the lower hooks an excellent screen against draught and cold in winter is
obtained whilst the upper part of the window ff is left free as a top light.
If the upper window panes be covered also with a second smaller blind of like
construction as for instance at night, an excellent protection against draught and
cofd is obtained, better than can be afforded by a shutter.
A window frame can never be applied so closely as a cardboard sheet fitting
exactly in the inner window opening, and as cardboard is a bad conductor of
heat, it affords excellent protection against heat and cold (Fig. 7). For the con-
struction of the improved blind cardboard of as strong a kind as obtainable should
be made use of in such a size that the blinds are easily handled and do not interfere
with curtains nor with objects standing on the window ledge.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is:
-
1. A window blind of a sheet of cardboard or like light material of the width of

page_text: same,
which by means of correspondingly adjusted hooks or other suitable securing
devices can be so suspended on the window frames or window openings that the
upper or the lower part of the window respectively remains uncovered.
Datad this fith day of August 1897.
W. P. THOMPSON & Co.,
322 High Holborn, London, W.C., Patent Agents for the Applicant.