Improvements in the Construction of Drawing-boards, Black-boards, and similar Boards.
Year: 1899

page_text: PROVIDIUNAL
SPECIFICATION.
Improvements in the Construction of Drawing-boards, Black-boards,
and similar Boards.
I, JOSEPH TREY, of 8, Laurel Grove, Armley, Leeds, in the County of York,
Wood Worker, do hereby declare the nature of this invention to be as follows:-
This invention relates to drawing boards, writing black-boards, and other
boards used for similar purposes, the chief object of my invention being to so
construct such boards that while they will be comparatively inexpensive to make,
they will not be liable to warp or become otherwise distorted during use.
According to my invention the board comprises three superimposed parts of
which the middle one consists of a number of transverse wooden strips joined
together and of longitudinal strips joined to the ends of the various transverse
strips. The end transverse strips form together with the longitudinal strips, a
complete frame which may be square-jointed or mitre-jointed and in such frame
the other transverse strips form a panel flush with the said frame. The other
two or outer parts which constitute the surfaces of the said board each consists
preferably of a single sheet of boarding or veneering glued or otherwise appro-
priately affixed to the middle part of the board. The outer parts of the board
may however consist of any other suitable material. These boardings, veneer-
ings or other suitable material should be of a thickness that will not cause
warping in the said middle part or panelled frame. The aforesaid transverse
and longitudinal strips of which the middle portion is composed are preferably
grooved and keyed together in any appropriate manner. Clamps or battens
may if desired be combined with my improved board in the ordinary manner.
The said outer parts of the board may be single or whole sheets of material
or may consist of several pieces joined together. I prefer however to use unjoined
sheets so as to avoid liability of the join or joins from opening.
The various strips composing the middle part of the board are preferably made
comparatively narrow and are preferably not joined together with glue. The
tendency of shrinkage of the board is thereby reduced to a minimum, because
each strip will only shrink proportionally to its width. .
Dated this 13th day of September 1899.
HASELTINE. LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in the Construction of Drawing-boards, Black-boards,
and similar Boards.
I, JOSEPH TREY, of 8, Laurel Grove, Armley, Leeds, in the County of York,
Wood Worker, 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 drawing boards, writing black-boards and other a
boards used for similar purposes, the chief object of my invention being to so
construct such boards that while they will be comparatively inexpensive to make,
they will not be liable to warp or become otherwise distorted during use.
For this purpose I construct the board of three superimposed parts comprising
two outer or surface portions and a middle portion consisting of a number of
transverse strips joined together in a surrounding frame.
In order that my said invention may be clearly understood and readily carried
into effect, I will proceed to describe the same more fully with reference to the
accompanying drawings in which:-
Figure 1 is a sectional plan of the board.
Figures 2 and 3 are respectively a longitudinal section and a transverse section
of the same taken respectively on the lines 1, 1, and 2, 2.
A is the middle portion composed of a number of narrow transverse wooden
strips grooved and keyed together at their edges and ends and of longitudinal
wooden strips d grooved and keyed to the ends of these transverse strips c.
The two end transverse strips c¹ form, together with the longitudinal strips d.
a complete frame which may be square-jointed or mitre-jointed and in such
frame the other transverse strips c form a panel, the surface of which is flush
with the frame. For large boards I use three or more longitudinal strips d
thus forming a frame with two or more panels.
B B are the two outer or surface portions of the said board, each consists
preferably of a single sheet of boarding or veneering glued or otherwise appro-
priately affixed to the middle portion of the board. The outer or surface
portions may however consist of any other suitable material. This boarding,
veneering or other suitable material should be of a thickness that will not cause
warping in the said middle portion or panelled frame. The aforesaid transverse
strips cc and longitudinal strips d of which the middle portion is composed,
are preferably grooved and keyed together or are jointed together in any other
appropriate manner. If desired clamps may be attached in the ordinary manner
to the ends or sides, and battens to the surfaces of my improved boards.
The said outer portions of the board may be single or whole sheets of material
or may consist of several pieces joined together. I prefer however to use unjoined
sheets so as to avoid liability of the join or joins from opening.
The various strips composing the middle portion of the board are preferably
made comparatively narrow and are preferably joined together without glue.
The tendency of shrinkage of the middle portion of the board is thereby reduced
to a minimum, because each strip will only shrink proportionately to its width.
This frame and the transverse strips in combination with the outer or surface
portions forms a board in which warping or bending is prevented.
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:
1. A board comprising three superimposed parts, of which the middle portion

page_text: consists of a number of transverse and longitudinal strips joined together in a
surrounding frame substantially as and for the purpose specified.
2. A composite board having its parts constructed and arranged substantially
as described with reference to the accompanying drawings for the purpose
specified.
101 1
1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.