IMPROVE- MENTS IN THE CONSTRUCTION OF WRITING SLATES
Year: 1885

page_text: I THOMAS WALTER BARBER, of 20 Canal Head, Ulverston, in the County of
Lancaster, Engineer do hereby declare the nature of my Invention for IMPROVE-
MENTS IN THE CONSTRUCTION OF WRITING SLATES, to be as follows:-
:-
My invention has for its purpose the construction of a form of slate or tablet
which may be used for School and similar purposes and shall be as nearly as
possible unbreakable.
I construct my improved slates of cold rolled sheet iron or steel in either of the
following ways.
1st A piece of board of the requisite size may have a thin sheet of iron or steel
fastened down on one or both its sides by through rivets or eyelets, the board being
a little larger than the sheet iron all round.
2nd The sheet of iron forming the slate may be provided with a tubular iron,
brass, or other metal rim all round its edges, such rim being in one piece and bent
round at the corners.
3rd Instead of the separate metal rim, the edges of the sheet itself may be turned
up in the form of a hollow bead on the four sides, the corners being afterwards
covered and secured by stamped metal clips or angle pieces secured to the iron
sheet and rounded so as to present no sharp angles.
Or, 4th Instead of these separate corner pieces, a solid round iron or steel core
may be inserted in the hollow bead and bent at the four corners so as to form
rounded angles.
All the iron or steel portions of the slates to be treated by the Bower-Barff
process, or any other process by which a surface of magnetic oxide may be formed
upon them.
31
1
.

page_text: Improvements in the Construction of Writing Slates.
I, THOMAS WALTER BARBER, Engineer, of 20 Canal Head, Ulverston in the
County of Lancaster, do hereby declare the nature of my said 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 has for its purpose the construction of a form of slate or tablet
which may be used for School and similar purposes and shall be as nearly as
possible unbreakable.
I construct my improved slates of cold rolled sheet iron or steel in either of the
following ways:-1st. A piece of board of the requisite size may have a thin sheet
of iron or steel fastened down on one or both its sides by through rivets or eyelets,
the board being a little larger than the sheet iron all round.
2nd. The sheet of iron forming the slate may be provided with a tubular iron,
brass or other metal rim all round its edges, such rim being in one piece and bent
round at the corners.
3rd. Instead of the separate metal rim, the sheet itself may be turned up in the
form of a hollow bead on the four edges, the corners being afterwards covered and
secured by stamped metal clips or angle pieces secured to the iron sheet by rivets
and rounded so as to present no sharp angles.
4th. Instead of these separate corner pieces a solid or tubular round iron or steel
core, bent at the four corners so as to form rounded angles may be inserted in the
hollow bead.
These processes may all be performed by ordinary fly-presses and suitable dies.
After manufacture all the iron or steel portions of the slates are to be treated by
the Bower-Barff patent process by which a surface of magnetic oxide may be
formed on them.
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 methods of constructing Iron or Steel slates or tablets without wood frames
substantially as described, and which slates or tablets may be afterwards treated by
the Bower-Barff patent process to preserve them from rust & produce a writing
surface.