IMPROVEMENTS IN OR RELATING TO JOINTS OR FASTENINGS FOR THE CORNERS OF FRAMES OF SCHOOL SLATES ADDILGĀDIE LAD SIMIT AD La
Year: 1883

page_text: LETTERS PATENT to Edward Meredith Owen of Festiniog in the county of
Merioneth Wales for an Invention of "IMPROVEMENTS IN OR RELATING TO
JOINTS OR FASTENINGS FOR THE CORNERS OF FRAMES OF SCHOOL SLATES
ADDILGĀDIE LAD SIMIT AD
La "
PROVISIONAL SPECIFICATION left by the said Edward Meredith Owen at
the Office of the Commissioners of Patents on the 6th July 1883.
.
EDWARD MEREDITH OWEN of Festiniog in the county of Merioneth Wales
"IMPROVEMENTS IN OR RELATING TO JOINTS OR FASTENINGS FOR THE CORNERS OF
FRAMES OF SCHOOL SLATES APPLICABLE FOR OTHER SIMILAR FRAMES.
The weakest point of a school slate is the corner of the frame if these are
strengthened by binding with tin they scratch the desks and are apt to cut the
finger and are at best unsightly. Now I have designed this invention with a view
to make the corners the strongest part of the frame, and at the same time
ornamental and without corresponding disadvantages. I form a shield of brass or
other convenient and suitable material, which is composed of two flat plates
preferably shaped like a right angled isosceles triangle, with an arc of a circle for a
hypothenuse, and a truncated angle in place of the right angle, the two lines
truncating the angles of the two plates are joined by a third plate formed in one
with the other two, (or if desirable the straight sides can be joined but I prefer the
corner plate). in applying the slate frame is pushed on a saw bench against two
rectangular guides. At the angle formed by these guides is a revolving cutter
which cuts out shallow beds for the two side plates and also cuts off a little of the
corner of the frame so as to allow room for the plate joining the two side plates.
the little casting now exactly fits the frame not projecting beyond it at any point
and is riveted in by rivets or screws passed through the frame and plates. Made
in brass it is decidedly ornamental.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent and of an
Order of the Lord Chancellor filed by the said Edward Meredith Owen in
the Patent Office on the 18th January 1884.
EDWARD MEREDITH OWEN of Festiniog in the county of Merioneth Wales
"IMPROVEMENTS IN OR RELATING TO JOINTS OR FASTENINGS FOR THE CORNERS
OF FRAMES OF SCHOOL SLATES, APPLICABLE FOR SIMILAR FRAMES
"
The weakest points of a school slate are the corners of the frame; if these are
strengthened by binding with tin théy scratch the desks and are apt to cut the
finger and are at best unsightly. Now I have designed this invention with a view
to make the corners the strongest part of the frame, and at the same time
ornamental and without corresponding disadvantages.
It is best described by aid of the accompanying drawings, in which Fig. 1 is a
plan of slate, Fig. 2 edge view, Fig. 3 perspective view of the shield. I have not
shown a revolving cutter, as in nearly all slate works where wooden frames are
made, revolving cutters are used to cut them, and a cutter to do the work above
mentioned only differs in its cutting contour from that required in tongueing the
släte frames. I form a shield of brass or other convenient and suitable material,
which is composed of two flat plates A B preferably shaped like a right-angled
iscosceles triangle with an arc of a circle for a hypothenuse D, and a truncated angle
in place of the right angle; the two lines truncating the angles of the two plates
are joined by a third plate formed in one with the other two (and if desirable the
straight sides can be joined, but I prefer the corner plate only). In applying, the
slate-frame is pushed on a saw-bench against two rectangular guides. At the angle
formed by these guides is a revolving cutter which cuts out shallow beds for the
two side plates, and also cuts off a little of the corner of the,fraine so as to allow
room for the plate joining the two side plates; the little casting now exactly fits
the frame, not projecting beyond it at any point, and is riveted in by rivets or
screws passed through the frame and plates. Made in brass it is decidedly
ornamental. It can be riveted, screwed or nailed in place as shown.
Having now described and illustrated my invention and given the best plan
known to me of carrying it into effect, I wish it to be understood that I am well
aware that the corners of slates have been of old bound with thin sheet iron or
tinned iron or possibly sheet brass bent round and over them, also that they have
been protected with wire, and I make no claim for these.ideas, but I believe that
slates have never. been protected by a corner piece cast to or stamped to the shape
required as shown, that they have never been of circular exterior or interior
contour such as shown at C and D nor have they been inlaid so as to be flush with
the surface of the slate, their bed being cut out with revolving cutter on the sides
at the same time as at the extreme corner, and it is to protect these improvements
that I have applied for the letters patent.
In witness whereof I the said Edward Meredith Owen have hereunto set my
hand and seal this thirty-first day of December in the year of our Lord one
thousand eight hundred and eighty three
1
EDWARD, MEREDITH OWEN (L.S.)