Year: 1887

page_text: I, HERMANN MÜLLER, of Düsseldorf, in the Kingdom of Prussia, German Empire,
Manufacturer, 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 :-
My invention relates to improved roller shutters, which, when desired, may also
be used as blinds having spaces for the entrance of air and light as in a Venetian
blind.
In the accompanying drawing
Figure 1 is a rear elevation of a combined shutter and blind constructed according
to my invention and
Figure 2 is a sectional side view of the same applied to a window.
Figure 3 is a view illustrating a detail.
Figure 4 is a view drawn to an enlarged scale illustrating the application of my
invention as a blind, and,
Figures 5 and 6 are a side and front elevation respectively, drawn to the same scale
showing the application of my invention as a shutter.
My improved shutter comprises two series of slats a, a¹ arranged alternately to
overlap one another as at a*, Figure 4, and connected together in pairs by means of the
flexible pieces b.
The slats a are provided with lugs c which are suitably supported in blocks c¹ in the
carrying bands & attached to the roller e the said bands sliding in guides d', d¹. The
blocks slide in the guides d' and are of the same shape as the slats a, a², so that when
the slats are closed the said blocks form with the slats a continuous surface. The
slats a' are connected to and carried. by the bands f,f by means of the flexible pieces or
hinges g.
When my improved apparatus is to serve as a shutter the slats a, a' are in the relative
positions shown in Figures 5 and 6, the flexible connection between the different
pairs of slats enabling the shutter to be coiled upon the roller e. When, however, the
apparatus is to serve as a blind the shutter is first lowered until the bands d´are
ID

page_text: the centre.
supported at the bottom, then as the bands ff are still further lowered the pairs of
slats owing to their weight will turn upon the pivots and assume the positions shewn
in Figures 2 and 4, the slats a bending upon their connections g and the slats a¹ upon
their lugs c.
The overlapping portious a* prevent the pair of slats from collapsing at
h is the cord or strap by which the combined blind and shutter is raised and lowered.
In order to retain the shutter at any intermediate position between its extreme
positions 1 attach a ratchet wheel i to one end of the roller, which ratchet wheel has a
pawl arranged in connection with it to which is attached a cord' k. By pulling the
said cord the pawl is disengaged from the ratchet wheel so that, the shutter is free to
descend.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. A combined roller shutter and blind the slats of which are connected together in
pairs, substantially as described.
2. A roller shutter comprising a series of double slats jointed at their fore or lower
edges to one set of bands or their equivalents and at their rear or upper edges to
another set substantially as described.
3. The construction, substantially as described and shewn, of a combined roller
shutter and blind, the slats of which, when the shutter is down, form a closed surface
and which may be readily adjusted by means of the lifting strap, to turn automatically
to form blind slats.
4. The improved combined roller shutter and blind constructed substantially as
described with reference to the accompanying drawing.
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