Improvements in Extensible Shutters, Doors, and the like.
Year: 1893

page_text: Date of Application, 22nd June, 1893-Accepted, 22nd July, 1893
COMPLETE SPECIFICATION.
Improvements in Extensible Shutters, Doors, and the like.
A communication from CARL BRUNO SEITLER, of Dresden, Johannisstrasse,
Architect.
I, ALFRED JULIUS BOULT of 323 High Holborn, in the County of Middlesex,
Chartered Patent Agent, 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 an extensible shutter for windows doors and the
like and consists of lattice-work swinging on a supporting bar and made in the form
of extensible trellis-work. Contrary to similar known arrangaments in which
vertical rods are connected by movable links to enable them to be drawn out,
which rods must however be supported at their lower ends, the present invention
has the advantage that the whole lattice-work is freely supported by and pivotted
on a rigid bar, which at the same time limits the extent to which the shutter may
be drawn out. The form of the trellis-work with diagonally arranged lattice-bars
prevents burglars from breaking through, as even if a whole bar were disconnected
or removed the other bars would not be injured and the opening thus obtained
would not be large enough to admit of any one passing through.
In the accompanying drawings
Figure 1 is a front view of the shutter one wing being drawn out or extended
and the other closed.
Figure 2 is an enlarged detail showing the manner of fastening the lattice-work
to the rigid bar.
Figure 3 is a transverse section of this detail.
Figure 4 shows the bars at the meeting edges with the sleeves holding the bars
of the lattice-work.
Figure 5 is a transverse section of Figure 4.
A bar bis inserted at its angular ends into the window or door frame a and is
kept in place by several clips or brackets c. On this bar bare loosely mounted
sleeves à to which the rods è of the lattice-work are fastened by rivets or equivalent
means.
e
As the sleeves d are limited in their upward or downward movement by the
brackets the framework can only be drawn out to a predetermined extent so that
the rods can never be arranged in such a position as to form large openings.
Each of the wings is provided at its outer edge with a bar f sliding on the floor
or equivalent p at the bottom of the door or on the lower part of the frame of the
window. The bars e are connected with this bar f by means of sleeves d'.
While the usual extensible shutters when not in use must be enclosed in recesses
of the door- or window-frame, the present invention has the advantage that the
lattice-work can be swung round and pushed flat against the wall so that these
shutters can be applied without difficulty to all doors and windows without requiring
special recesses.
Having now particularly described and ascertained the nature of the said inven-
tion as communicated to me by my foreign correspondent, and in what manner the
same is to be performed, I declare that what I claim is ;-
A shutter door or the like consisting of extensible trellis-work the rods e of which

page_text: are secured to sleeves d having a vertical and rotary movement on a bar b on which
the whole structure is freely supported substantially as described.
Dated this 22nd day of June 1893.
W. P. THOMPSON & BOULT,
Of London, Nottingham, Liverpool, and Manchester,
Agents for the Applicant.