An Improvement in or connected with Drawing Boards.
Year: 1892

page_text: Date of Application, 1st July, 1892
Complete Specification Left, 18th Jan., 1893-Accepted, 11th Mar., 1893
PROVISIONAL SPECIFICATION.
An Improvement in or connected with Drawing Boards.
WILLIAM BARNARD PINHEY 6 Albion Road, Lewisham, S.E. Surveyor do
hereby declare the nature of this invention to be as follows:-
A rectangular frame fixed to the back of an ordinary drawing board for the
purpose of stretching and holding drawing material without the use of pins. In
the drawings accompanying this Specification No. I represents the back of an
ordinary drawing board with the invention attached. B represents the board upon
which is fixed a frame C of smaller dimensions, thus leaving a margin on all sides.
Upon the framework C are attached at intervals the springs A, the number
varying according to the size of the board. These springs hold in position the
rods D which latter may be round or angular. The springs A may be attached
to the framework C as shown by section No. II or may be so made as to fit
beneath it as shown in drawing No. III. The framework C may be dispensed
with by rebating the margin of the board itself as shown in No. IV, the springs
being attached in either of the ways illustrated. In lieu of the rods and springs
an oscillating margin may be attached to the edges of the board as shown by
No. VI where E represents the margin which is hinged at G, springs being fixed
at H and the rods being held in position by concave sinking at J. To stretch the
drawing material upon the board the edge of the material should be laid in the
margin between the board and the framework C on one side as shown in
drawing No. V, and the rod D slipped beneath the springs A.
The sheet may
then be stretched to the opposite side and fixed in like manner the ends being
subsequently fastened in the same way. The framework C may also be dispensed
with as well as the rebate by attaching springs to the back of the drawing board
itself.
COMPLETE SPECIFICATION.
An Improvement in or connected with Drawing Boards.
I, WILLIAM BARNARD PINHEY of 6 Albion Road, Lewisham in the County
of Kent, Surveyor, 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 means or apparatus for stretching and holding paper
canvas or other material on drawing boards and the like without the use of
drawing pins, glue or other fixing or adhesive material and consists of a drawing
board provided with clipping strips, the material to be stretched being placed on
the board and turned over its edges, and secured in place by the said strips which
are retained in position by spring clips.
Referring to the accompanying sheet of illustrative drawings:
Fig. 1. represents a back elevation,
Fig. 2. a transverse section and
Fig. 3 a perspective view of a drawing board constructed according to this
invention.
A rectangular frame a of smaller dimensions than the board b is secured to its
back leaving a small margin all round between their edges. To the frame a are
attached at intervals the spring clips c which serve to hold the rods or strips & in
position.

page_text: The material to be stretched is damped or otherwise prepared in the ordinary
manner and the board placed on it or vice versa; the marginal edge of the paper
is then turned over the edge of the board and strip d pushed in beneath the
spring clips c the process being repeated with the remaining edges.
Fig. 4 represents a transverse section of a drawing board in which the spring
clips c are secured between the frame a and board proper b.
Figs. 5 and 6 show in transverse section the outer part of a board with rebated
edges, the frame a being thereby dispensed with.
:
Fig. 7 represents the outside edge of a drawing board provided with hinged
clipse held by screws and forced outward by the springs g. The paper is placed
on the board as above described, and the retaining rods are pushed into the
space under the front of the clip, where it is securely held by the action of the
spring.
Fig. 8 represents in cross-section one edge of a drawing board provided with an
outer frame i so as to leave a groove or channel all round in the face of the
board. Springs m fastened in the board are hinged to the strip or rod n (or the
spring and rod may be detached from each other), which may be withdrawn and
rotated out of the channel until the paper has been turned over the edge o of the
board when it is returned to its normal position and pressed by the spring m
against the edge of the paper as is clearly shown.
Figs. 9 and 10 represent a cross-section and a plan of a part of an edge of a
drawing board similar to that shown in Fig. 8, the springs m (Fig. 8) being
replaced by bent springs p. The rod n is removed from the groove or channel 7,
the paper turned over the edge o of the board and the rod replaced, the springs
pressing it tightly against the paper to retain it in position.
Fig. 11 represents the rod a hinged to spring m secured to the board. To secure
the paper the rectangular rod n is rotated out of the way, the paper turned over
the edge o of the board and the rod replaced in the rebate, the spring m pressing it
against the edge of the paper.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. Securing the edges of paper or other material to drawing boards or the like
by means of rods pressed against the paper by spring clips substantially as
described.
2. The arrangement and construction of drawing boards and the like substan-
tially as described with reference to Figs. 1 to 6.
3. The combination of a board with a hinged clip e pressed against a retaining
rod substantially as described with reference to Fig. 7 of the drawings.
4. The arrangement and construction of drawing boards substantially as
described with reference to Figs. 8 to 11 of the drawings inclusive.
Dated this 18th day of January 1893.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.