Improvements in the Construction of Venetian Blinds.
Year: 1893

page_text: Date of Application, 18th Sept., 1893
Complete Specification Left, 16th Apr., 1894-Accepted, 2nd June, 1894
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Venetian Blinds.
GEORGE WILLSHIRE JOHNS, 9 Ambler Road in the Parish of Islington, in
the County of London, do hereby declare the nature of this invention to be as
follows:-
My invention consists of wooden frames, covered with textile material, for use in
the construction of Venetian blinds, in place of the solid wooden laths now in
common use.
My plan is to use light, narrow, laths of pine, or other wood, to form oblong
frames to the required size.
These frames are held rigid by steel pins being inserted at right angles, into the
inside edges of the two laths formning the sides of the oblong frames. The joints
at the angles of the frames are glued, and strengthened by calico glued across
them.
The frames thus formed are covered with woven, or other material, and perforated
through the covering material for the blind cords, these perforations are protected
by eyelets of leather, or other material.
Thin iron plates to which the blind cords are fastened, being fixed in the bottom
frames, inside the covering material.
The principal feature in these improvements is that Venetian blinds, constructed
on these principles, would only be about half the weight of the ordinary Venetian
blinds now in use.
Dated this 18th day of September 1893.
GEORGE WILLSHIRE JOHNS.
COMPLETE SPECIFICATION.
Improvements in the Construction of Venetian Blinds.
I GEORGE WILLSHIRE JOHNS of 9 Ambler Road, in the Parish of Islington,
in the County of London, Joiner, 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 consists of wooden frames covered with textile material for use in
the construction of Venetian blinds in place of the solid wooden laths now in
common use.
My plan is to use light narrow laths of pine, or other wood, to form oblong
frames to the required size.
These frames are held rigid by steel pins being inserted at right angles into the
inside edges of the oblong frames. The joints at the angles of the frames are
glued, and strengthened by calico glued across them.
The frames thus formed are covered with woven or other material, and perforated
through the covering material for the blind cords, these perforations being
sufficiently elongated to permit of the free running of the cords in all positions of the
frames, and are protected from the running cords by eyelets of leather or other
material.
Thin iron or other metal plates or cups to which to which the blind cords
are fastened are fixed in the bottom frame of each blind inside the covering
material.

page_text: The principal features in these improvements are the two following:-1st. Light-
ness. 2nd. Artistic display, as the covering material can be selected, as in the case
of fancy roller blinds, to suit the decorations of a room. To give greater durability
most of the material used for covering the frames can be varnished.
Reference is to be had to the accompanying full size drawings forming part of
this Specification, wherein
Figure 1 is a plan of a part of a frame;
Figure 2 is an end section through a frame;
Figure 3 is an end section through the covering material
Figure 4 is a section through a frame longitudinally;
Figure 5 is a section longitudinally of covering material;
;
2
Figure 6 is a section through one of the metal plates or cups to which the ends
of the running cord is fastened;
Figure 7 shews the shape of the perforations through the covering material for
the runuing cord;
Figure 8 shows a metal clip which may be used to form the ends of the frames in
place of the cross-piece a².
The same letters of reference indicate like parts in all the figures.
In Figure 1, u, a' are the laths forming the sides of the oblong frames, into
which the steel pins, are inserted; a² is a cross-piece forming an end of a frame
which is glued to the side laths a, a'; a piece of calico or tape e being glued across
the joints on both sides of the frames. I wish it to be understood that I do not
confine myself to the cross-piece a² to form an end of a frame, but may instead use
a metal clip as shewn in Figure 8.
The steel pins, are inserted into the inside edges of a a¹ forming the sides of
the frame to within an th of an inch of the outside edges, pin being placed close
to the cross-piece a² and the intermediate pins about 8 inches apart.
In
In Figure 2 the dotted line d is the covering material a steel pin. Figures 3,
4, 5 are similar sections. The covering material d is first preferably made in a
circular form either woven throughout or made with a seam and then pressed flat.
The frames are then placed inside the coverings. The seams are secured by
stitching or by india-rubber solution, fish glue, or other adhesive cement.
Figure 6 g is a lath forming part of a bottom frame, and similar to a. a' in
other figures. It is provided with strengthening cross-pieces to receive the metal
plate or cup, to which the running cord is attached. The shewn perforations are
not used in the covering of this frame, a small hole only being made to allow the
running cord to pass through from the metal cup. I may use in small blinds a
covered solid lath in place of this frame. In Figure 7 the eyelet piece e is secured
by stitching or an adhesive cement preferably inside the covering material d,
however I may use a metal eyelet and clinch the same. In Figure 8 the metal
clip h may be fixed to the ends of the frames by indentations.
The frames made and covered, as described may be mounted as in the ordinary
Venetian blind.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is;
The herein described mode of forming light wooden frames, held rigid by steel
pins, and covered with woven or other material, in place of the solid laths for
Venetian blinds, substantially as specified.
Dated this 16th day of April 1894.
GEORGE WILLSHIRE JOHNS.