Improvements in and relating to Drawing Boards, Tee Squares, and Angle Gauges.
Year: 1899

page_text: Date of Application, 18th July, 1899-Accepted, 26th Aug., 1899
COMPLETE SPECIFICATION.
Improvements in and relating to Drawing Boards, Tee Squares,
and Angle Gauges.
I, WILHELM LEITZ, of 43, Belforter Street, Freiburg, in the Empire of Ger-
many, Architect, do hereby declare the nature of my invention and in what
manner the same to be performed to be particularly described and ascertained
in and by the following statement:-
This invention has reference to drawing-boards, and means for carrying or
supporting the same for use when drawing is to be done out-of-doors.
The invention is illustrated in the annexed drawings in which like letters
and figures are used to denote like parts.
DESCRIPTION OF THE DRAWINGS.
Figure 1 shows a front view of the drawing-board holder, with the board fixed
on it.
"
Figure 2 is a side elevation of the holder showing the drawing-board lowered.
Figure 3 is a plan of the drawing-board showing the "T square" arrangement.
Figure 4 shows the arrangement of the
T square " in section.
With reference to the drawings the drawing-board holder, being a support
or carrier, according to this invention consists of the two struts or supports a, a,
preferably made of wood and joined to each other by a bent metal cross-stay b.
At the upper end of the struts a a there is provided a strap or sling e by which
the board can be suspended round the neck of the user. The struts a a have
fastened to them by screws flat metal bars dd, to which hinge-cheeks e are
attached which carry the hinged bar f, which at its other end is hinged on the
iron band g, fixed by screws to the lower side of the drawing-board h. On the
lower side of the hinged bar f a cross-iron is attached, which carries at its
lower side the bar / borne in suitable bearings and provided with a handle m,
and which with its tongue-like front-end n catches into a hook o which is fixed
on the lower side of the drawing-board.
A spiral spring p, arranged between the bearings kk, retains the bar so
as to remain caught in the hook o. On the upper side of the drawing-board
flat iron bars are arranged on either side, on which the horizontal "T
square" with its hooklike bent ends slides.
On this "Tsquare" the foot of the "angle" (or angle-gauge) is borne
in suitable guides; at its lower end the angle-gauge is provided with three
holes for adjustment, through which holes the pin of the springy which
is attached to the foot u, is passed.
23
On the "angle v, lateral arms 1 and 2 are arranged; the range of motion
of these being limited by stops 3, 4 so that they will form a right or an acute
angle. The Tsquare" is retained in its temporary position by suitably
arranged springs, sliding on the bars
q.
The whole arrangement is used in the following manner:-
After having suspended the apparatus round one's neck by means of the strap
or sling c, the drawing-board may be turned downwards on the hinge c until
it rests in a somewhat slanting position, but quite firmly, on the hinged bar f.

page_text: 66
The square
can be conveniently shifted upwards or downwards on the
board, and the angle (or angle-gauge) can also be shifted at will to the right
or left. If the drawing-board is to be used in a sitting position, (for instance
for painting or drawing), the carrying arrangement may be removed from round
the neck, and after the bar has been drawn back, the board may be turned
on its hinge so as to rest on the struts a, which can be used as a support.
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 carrying or holding apparatus for drawing-boards, constructed, and
operating substantially as described, and characterised by the drawing-board
being fastened by hinges e to struts or legs a a, to which a strap or sling c is
fastened by which it can be carried round the neck, the hinges e being con-
nected by a bar f with other hinges which are held fast in position by a bar l
catching into a hook o arranged at the lower side of the drawing-board, so
that on releasing the bar the drawing-board can be tilted downwards entirely,
as set forth.
"
", the
2. In the apparatus and drawing-board claimed under Claim 1, the arrange-
ment of slide-bars along the sides of the drawing-board, the "T square'
adjustable angle-gauge bar v, and movable arms 1 and 2 constructed and operat-
ing substantially as described and illustrated in the annexed drawings.
FREDERICK J. CHEESBROUGH, Fel. Chart. Inst. P.A.,
Grant & Maddison's Bank Buildings, Canute Road, Southampton,
Applicant's Agent.