IMPROVEMENTS IN WRITING SLATES دو
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by the said John Williams and William
"
Williams at the Office of the Commissioners of Patents on the 17th October
1882.
JOHN WILLIAMS and WILLIAM WILLIAMS, both of Llanfair, North Wales.
IMPROVEMENTS IN WRITING SLATES
دو
The object of this invention is to strengthen the frame of the slate and we do.
this in the following manner In the wood frame are formed two grooves or
channels, preferably in the end frames, and holes, bored diagonally through the four'
corners of the frame, communicate with these. A long wire is placed in these
grooves and each of its ends is passed through one of the diagonal holes and the
projecting point forced into the wood of the frame. By this arrangement great
strength is imparted to the frame, so much so, that we have found it hold together
even when the pins usually used for fastening the corners together, are removed.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Williams and William Williams in the Great Seal Patent
Office on the 17th April 1883.
JOHN WILLIAMS and WILLIAM WILLIAMS, both of Llanfair; North Wales
* IMPROVEMENTS IN WRITING SLATES"
The object of this invention is to strengthen the frame of the slate and we do
this in the following manner.
In the wood frame are formed two grooves or channels preferably in the end
frames and holes bored diagonally through the four corners of the frame commu-
nicate with these A long wiro is placed in these grooves and each of its ends is
passed through one of the diagonal holes and the projecting point forced down into
the wood of the frame.
By this arrangement great strength is imparted to the frame, so much so that
we have found it to hold together even when the pins usually used for fastening
the corners together are removed
•
In the accompanying drawings Fig 1 shows an edge view of the end of the slate,
Fig 2 a face view of it, one half being in section so as to show how the wires are
placed, and Fig 3 is a cross section of one of the joints, A is the frame of the slate,
the usual tenon and mortice at the corners being dispensed with the ends being
simply bevelled and made to abut against each other. Bare the wires lying in
grooves C and passing through holes D right through the joints. The ends B₁ of
the wires are turned in as shown thus making the whole secure and it will be.
observed that by this, arrangement one wire holds one end and portions of two
sides or if the grooves be placed in,the sides each wire would secure one side and
portions of two ends. Cement or composition may be placed in the slate grooves
to give additional rigidity
Having now described our invention and the method of performing the same We
claim under the herein before in part recited Letters Patent:-
The wire B extending along one length or portion of the frame and through two
corners, whereby the whole of one length and portions of two others are securely
bound together substantially as set forth and shown
In witness whereof, We the said John Williams and William Williams have
hereunto set our hands and seals this thirteenth day of April in the year
of Our Lord one thousand eight hundred and eighty three.