Improvements Black-boards and Apparatus for Facilitating Drawing from Models, Teaching of Music, and other similar purposes.
Year: 1893

page_text: Date of Application, 22nd Mar., 1893
Complete Specification Left, 22nd Dec., 1893-Accepted, 22nd Mar., 1894
in
PROVISIONAL SPECIFICATION.
Improvements Black-boards and Apparatus for Facilitating
Drawing from Models, Teaching of Music, and other similar
purposes.
I, JOHN FLYNN, of 2 Morna Road, Denmark Hill, in the County of London,
Schoolmaster, do hereby declare the nature of this invention to be as follows:
-
My invention has for object the construction of an improved black-board and
apparatus by means of which I am enabled to facilitate to a very great extent the
drawing of common objects from models, the teaching of music, and at the same
time provide a suitable table or shelf capable of being raised or lowered as
required, together with means for holding and displaying maps or charts; and it
consists of an upright frame. which may be made of wood or other suitable material,
within which is an inner or movable frame arranged so as to be capable of being
raised or lowered to any desired height. This inner frame which is preferably
made square has a number of cords or wires extending from side to side in a
horizontal and vertical direction, so as to divide the area of the movable frame into
a number of equal squares.
Beneath this movable frame is a horizontal cross bar or rail also capable of being
raised or lowered. To this rail are hinged two distinct black-boards one on either
side; the boards being of such size that when folded up in a vertical position they
entirely close up the inner movable frame. The boards can be lowered from a
vertical to a horizontal plane, or can be lowered altogether, and are provided with
cords and hooks or their equivalent for the purpose of securing same in either
position.
The inner face of one board may be ruled with the ordinary music lines, and
the other with those of the Tonic Sol-fa system. At the top of the frame carrying
the moving boards and inner frame I provide a suitable hook or fastening from
which can be suspended a map or chart.
When it is desired to draw from or copy a model, one or both boards are lowered
to a horizontal plane, or one board may be lowered to a horizontal and the other to
a vertical position; the model or figure to be copied being placed upon the
horizontal board, and immediately behind the cords or wires of the inner frame as
seen from the front. The intersection of the cords or wires in front of the model
will then indicate exactly the relative position of the various parts of the model
and also facilitate to a very great extent the drawing of the same.
By lowering one or other of the boards the music lines on the inner face of the
other can be disclosed and utilized as desired. The outer face of each board may
be utilized in the ordinary way, and further, each board when lowered provides a
convenient and adjustable shelf, so that the two boards may serve as the vertical &
ground plane respectively for the purpose of illustrating the principles of solid
geometry.

page_text: Improvements in Black-boards and Apparatus for Facilitating
Drawing from Models, Teaching of Music, and other similar
purposes.
I, JOHN FLYNN of 2 Morna Road Denmark Hill in the County of London
Schoolmaster 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:-
My invention has for object the construction of an improved blackboard and
apparatus by means of which I am enabled to facilitate the drawing of common
objects from models the teaching of music and and the same time provide a suitable
table or shelf capable of being raised or lowered as required, together with means
for holding or displaying maps or charts and it consists of an upright frame A
which may be made of wood or other suitable material, within which is an inner
or movable frame B arranged so as to be capable of being raised or lowered to any
desired height. This inner frame which is preferably made square has a slot C
from top to bottom for receiving a wire frame. This wire frame has its area
divided into equal squares which are formed by vertical and horizontal wires. The
wires are of two kinds. Thick wires D divide the frame into nine squares and
smaller ones E subdivide it into one hundred and forty four squares.
To the movable frame are hinged two distinct blackboards, F. G, one on either
side, the boards being of such a size that when folded up in a vertical position they
fall flush with, and fill up the space within the movable frame F.
The boards can be lowered- from a vertical to a horizontal plane F' or can be
lowered altogether F and are provided with cords H and hooks or their equivalents
for the purpose of securing same in either position.
The inner face of one board may be ruled with the ordinary music lines and the
other with those of the Tonic Sol-fa system. At the top of the frame carrying the
moving boards I provide a hook or fastening I from which can be suspended a map
or chart.
When it is desired to draw from or copy a model one board is lowered to a
horizontal plane and the other to a vertical position; the model or figure to he
copied being placed upon the horizontal board immediately behind the wires of the
inner frame as seen from the front. The intersection of the wires in front of the
model will then indicate exactly the relative position of the various parts of
the model:
The wire frame may be taken from the slot and used alone for obtaining the
same results.
In that case it is held vertically on the floor by light attachable
brackets, at the sides or bottom J and carries a plumb line for adjustment.
By lowering one or other of the boards the music lines on the inner face of the
other can be disclosed and utilized as desired. The outer face of each board may
be utilized in the ordinary way, and further each board when lowered provides a
convenient and adjustable shelf so that the two boards may serve as the vertical
and ground plane respectively for the purpose of illustrating the principles of solid
geometry.
"
The movable frame is fixed at varying heights (1) by the upright frame being
"housed into it K and by the movable frame being bound to this by a screw L
or (2) by the movable frame being "housed into the upright frame M. The
upright frame would then have a ratchet arrangement O and the movable frame be
fitted with springs P capable of being drawn when lowering the frame, which
springs when free would play into the ratchet work on either side and support the
whole

page_text: 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.) That as a blackboard it is readily raised or lowered to any convenient
height.
(2.) That it lends itself to a more convenient display of maps and charts before a
class.
(3.) That it provides the two planes needed to illustrate the principles of solid
geometry.
(4.) That it provides an improved means of displaying models at various heights.
(5.) That it provides on its inner faces for preservation of sketch maps, pieces
of music etc. so long as such may be needed.
(6.) That it gives a perfect illustration of a square yard and a square foot.
(7.) That it indicates exactly the relative positions of the various parts of the
model.
Dated this 22nd day of December 1893.
JOHN FLYNN.