An Improved Device for Strengthening Chairs and such like Furniture.
Year: 1897

page_text: Date of Application, 25th Feb., 1897
Complete Specification Left, 21st Apr., 1897-Accepted, 19th June, 1897
PROVISIONAL SPECIFICATION.
An Improved Device for Strengthening Chairs and such like
Furniture.
I, MOSES LAZARUS FLIGELSTONE, of No. 42 Castle Road, Cardiff, in the
County of Glamorgan, Cabinet-maker, do hereby declare the nature of this
invention to be as follows:-
This invention relates to an improved method of strengthening chairs, and such
like furniture. Usually the framework of a chair or that upon which the seat is
placed, is morticed into the back and front legs. These mortices are necessarily
the weakest part of the chair, and when a person leans back and throws his weight
on the front legs, an immense leverage is brought to bear upon the back mortices,
so that unless this part of the chair is very strong, the mortices usually give way.
The same remarks also apply to the mortices in the front legs, but in a somewhat
lesser degree. In order to counteract this strain, I apply to the chair, a mechanical
appliance adapted to counteract the strain and which is made as follows.
To the front bar of the seat of the chair, I attach an iron or other metallic bar,
with a jaw or claw fastened or screwed, in any convenient way, to the top and
bottom faces of the front bar, so that this jaw acts in the same way as a spanner
does upon a nut. In addition, I may, if necessary, have a flange formed upon the
back part of the jaw, which can also be screwed to the back part of the bar.
Attached to the bar, and forming oue piece therewith, is a prolonged rod, which
passes through a hole in the back bar or frame of the chair. This bar has its end
screwed, and nuts thereupon. These nuts are sunk or recessed into the back bar,
and have slots cut in their faces, so that they may easily be operated, by means of
a form of screw-driver, or key made for the purpose. Metal washers are placed
in the recess for the nuts to bear against. To strengthen the attachment to the
back legs and bar, I apply an angle plate with a tubular projection, through which
the screwed rod passes; the angle plate portion being screwed to the leg of the
chair and the back bar, so that when a strain is brought to bear upon the seat, it
is impossible to break away the mortices or dowels, without first tearing the angle
plate away from the woodwork, or bending the screwed rod.
Dated this 25th day of February 1897.
PHILLIPS & LEIGH,
Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Device for Strengthening Chairs and such like
Furniture.
I, MOSES LAZARUS FLIGELSTONE, of No. 42, Castle Road, Cardiff in the
County of Glamorgan, Cabinet-maker, 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 :-
This invention relates to an improved method of strengthening chairs and such
like furniture. Usually the framework of a chair or that upon which the seat is
| Price Rd1

page_text: placed is, morticed into the back and front legs. The mortices are necessarily the
weakest part of the chair, and when a person leans back and throws his weight on
the front legs, an immense leverage is brought to bear upon the back mortices, so
that unless this part of the chair be very strong, the mortices usually give way.
Same remarks also apply to the mortices in the front, but in a somewhat lesser
degree. In order to counteract this strain, I apply to the chair a mechanical
appliance adapted to counteract the strain.
I will now proceed to describe my invention, reference being had to the
accompanying drawings, in which
Figure 1 is a central section through an ordinary chair fitted with my improved
strengthening device.
Figure 2 is a plan of the seat of the chair, shewing the forked rods A, A, in
position, the back rail of the chair being shewn in section.
Figure 3 is an enlarged view of the forked rod, with the front and back rails of
the chair shewn in section.
Figure 4, is a plan of Figure 3, with the ends of the jaw B made circular.
Figures 5 and 6, are plans of the forked rod, fitted with square ends.
Similar letters of reference indicate corresponding parts throughout the views.
A is the forked rod; B, indicates the ends of the rod A; C is the front bar of the
chair; D, are the screws which fasten the ends of the rod A. to the front bar of the
chair; E is the back bar of the chair; F is the nut by which the rod A is secured
in the back bar of the chair; and G is the washer therefor.
To the front bar of the seat of the chair, I attach one or more iron or other
metallic rod or rods A, having at one end thereof a jaw or claw B, fast or screwed,
in any convenient manner, to the top and bottom faces of the front bar C of the
chair. In addition, I may, if necessary, have a flange formed upon the back part
of the jaw, which can be secured to the back part of the front bar of the chair.
The iron bar or rod A, is prolonged at its opposite end and passes through a hole
in the back bar E, of the chair, in which it is preferably secured and tightened up
by means of a nut F and washer G. This nut is sunk or recessed into the back
bar, and has a slot cut in its face, so that it may be easily turned by means of a
form of screw-driver or key made for the purpose. To strengthen the attachment
to the back legs and bar, I apply an angle plate with a tubular projection through
which the screwed rod passes; the angle plate portion being screwed to the chair
leg and to the back bar, so that when a strain is brought to bear upon the seat, it
is impossible to break away the mortices or dowels, without first tearing the said
angle plate away from the woodwork or bending the screwed rod.
The ends of the jaw B, are preferably made circular as shewn in Figure 4, so
that they can be sunk into the woodwork and thus assist in giving strength, by
reason of the sides being supported.
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 :-
The herein described improved device for strengthening chairs and such like
furniture, consisting of a metal rod or rods adapted at one end to embrace and be
secured to the front bar of the seat of the chair, and at the other end to be secured
in a recessed hole to the back bar of the seat of the chair substantially as herein
described and set forth.
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PHILLIPS & LEIGH,
No. 22 Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.