Improvements in Drawing Boards.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in Drawing Boards.
A communication from ARNO SCHMIDT, of Seelingstädt, Dresden, in the Empire of
Germany, Master Builder.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Chartered Patent Agent, do hereby declare the nature of this invention to be as
follows:-
This invention relates to a drawing board having a device for securing or
stretching the paper, whereby the use of pins or the glueing of the paper becomes
unnecessary.
In the board there are formed near the edges, undercut or dovetail
drawing paper to be used is of about the size of the board and is cut out rectangularly
grooves. The
at the corners up to the parts corresponding to the crossings of the grooves. The
strips thus produced at the edges are then pushed into the grooves and in the folds,
thereby produced rods of dovetail section are placed, which rods nearly fill up the
grooves. Owing to the friction and "grip" being very considerable at the bends of
the paper the latter is securely held.
The simplest construction is to have these grooves at all four edges of the board.
If the paper is damp when mounted, then it can be stretched as well as if secured
with glue. If desired, to provide for the efficient stretching of the paper without
wetting it it is preferable to make the fixing or clamping devices at two adjacent or
following edges adjustable, the other two devices being stationary as in the before
described example.
For this purpose the two edges of the board at which the adjustable clamping
devices are located are rebated or otherwise similarly formed with undercut edges or
shoulders and provided with angle irons. In the hollow spaces between these
shoulders and angle irons there are rails formed with dove-tail grooves and capable
of adjustment each at right angles to the other adjustable rail by means of screws or
similar devices. The paper is secured to the rails when the latter are at or near their
innermost position by sliding in the rods as before described; then the rails are moved
outwards by the screws till the paper is stretched.
If the board be sufficiently thick the grooved rails may also be moved perpen-
dicularly to the face of the board that is to say downwards, when the paper is to
be stretched suitable means for adjustment being provided as may be found
necessary.
It is preferable to make the grooves and rods of prismatic shape, in order to have
several bends in the paper.
When the clamping devices are stationary, it is preferable to form the grooves in
or of metal.
In order to enable the rods to be easily withdrawn, they are each provided with a
hole, with which a hook may be engaged. This hook may be combined in one tool
with a spanner or key for turning the screws. The different parts of the invention
may be modified without departing from the spirit of the invention.
Dated this 27th day of March 1896.
BOULT & WADE,
Agents for the Applicant.

page_text: Improvements in Drawing Boards.
A communication from ARNO SCHMIDT, of Seelingstadt, Dresden, in the Empire of
Germany, Master Builder.
I, ALFRED JULIUS BOULT formerly of 323 High Holborn now of 111 Hatton
Garden in the County of Middlesex, Chartered Patent Agent, 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 a drawing board having a device for securing or
stretching the paper, whereby the use of pins or the glueing of the paper becomes
unnecessary.
Fig. 1 is a plan of the whole board on a small scale, the other figures being
separate views on a larger scale.
Figs. 24 and 2B are parts of a longitudinal section,
Fig. 3 is a plan view partially in section or part of the board corresponding
to Fig. 2B.
Fig. 4 shows in plan and cross section the rod to be placed in the undercut grooves
of the board and.
Fig. 5 a tool to be used with the board.
In the board A there are formed near the edges, undercut or dovetail grooves.
The drawing paper to be used is of about the size of a board and is cut out
rectangularly at the corners up to the parts corresponding to the crossings of the
grooves. The ends of the strips thus produced are then pushed into the grooves
and in the folds, thereby produced rods of dovetail section are placed, which rods
nearly fill up the grooves. Owing to the friction and "grip" being very considerable
at the bend of the paper the latter is securely held.
A simple construction is to form these grooves as described and as represented
at a (Figs. 1 and 2) at all four edges or sides of the board. If the paper is damp
when mounted, then it can be stretched as well as if secured with glue. If desired,
to provide for the efficient stretching of the paper without wetting it it is preferable
to make the fixing or clamping devices at two adjacent or following edges adjustable.
Such arrangement is shown at a¹ in Figs. 1 and 28; the other two devices being
stationary as in the before-described example.
For this purpose the two edges of the board at which the adjustable clamping
devices are located are rebated or otherwise similarly formed with undercut edges
or shoulders as at a¹ and provided with angle irons B. In the hollow spaces
between these shoulders and angle irons there are rails C formed with the dove-tail
grooves and are capable of adjustment each at right angles to the other adjustable
rail by means of screws c or similar devices. The paper is secured to the rails C
when the latter are at or near their innermost position the edges of the paper are
fixed in their grooves by sliding in the rods as before described then the rails are
moved outwards by the screws till the paper is stretched.
If the board be sufficiently thick the grooved rails C may also be moved perpen-
dicularly to the face of the board that is to say downwards when the paper is
to be stretched suitable means for adjustment being provided as may be found
necessary.
It is preferable to make the grooves and rods of prismatic shape in order to
have several bends in the paper the groove in Figure 24 and 2B has a dove-tail
shape and the rods D are shaped accordingly when the clamping devices are
stationary it is preferable to form the grooves in or of metal.

page_text: In order to enable the rods D to be easily withdrawn they are
with a hole with which a hook may be engaged. This hook may be combined in
one tool with a spanner or key for turning the screws c as shown in the Figure 5.
The different parts of the invention may be modified without departing from the
spirit of the invention.
Having now particularly described and ascertained the nature of the said inven-
tion as communicated to me by my foreign correspondent and in what manner the
same is to be performed, I declare that what I claim is :-
1. A drawing board provided with undercut or dovetail grooves formed at its
edges and rods to be introduced in these grooves for holding the paper substantially
as described.
2. A drawing board of the character described provided with rails at two
adjacent edges which rails have undercut or dovetail grooves for receiving the rods
the rails being movable in the hollow spaces of the board by means of screws or
5 equivalent means in such way that this movement of the rails causes the paper to be
stretched tightly substantially as described.
1906
SOUTH & WADE,
BOULT & WADE,
Agents for the Applicant.