Improvements in a Combined Chart and Blackboard.
Year: 1893

page_text: Date of Application, 19th Jan., 1893
Complete Specification Left, 19th Oct., 1893-Accepted, 25th Nov., 1893
PROVISIONAL SPECIFICATION.
[Communicated from abroad by JOHN B. POWELL, Gentleman, and MARY C.
POWELL, Gentlewoman, both of Parker, in the County of Turner and State of
South Dakota, U.S.A.]
Improvements in a Combined Chart and Blackboard.
I, REGINALD WALTER BARKER, of Monument Chambers, King William
Street, London, Middlesex, Patent Agent, do hereby declare the nature of this
invention to be as follows:-
The invention more particularly relates to a combination blackboard and chart
device designed for use in schools of all characters and in other places as an aid to
instruction in any particular branch or branches.
In my invention a rectangular frame is provided having bearings in its lateral
edges at the central portion thereof, which are loosely engaged by pivot studs in
suitable side posts, whereby the said frame is capable of a free swinging movement
between said posts. The studs are preferably small thumb or set screws-which
may be brought into sufficient engagement with the bearings to support the frame at
any desired angle for facilitating the exposure of the matter upon the chart and
blackboard now to be described.
The blackboard is secured firmly to one side of the frame and consists of a rigid
back having a blackboard surface.
The chart which I employ consists of a single elongated piece of broad web or
ribbon of flexible material, on which is printed or stamped any kind of educational
matter, such as maps, diagrams, phonetic and grammatical exercises, anatomical
figures, &c. This web or ribbon is carried by vertical rollers, one at each end and
journaled loosely in the frame at their ends. The upper end of each roller carries a
crank by the operation of which the web or ribbon forming the chart may be
turned to expose the desired part of its surface. The movement of the rollers is
properly retarded by means of spring pressed brakes pressing against their upper
portions.
The chart may be tacked to the rolls at its ends, or said rolls may each be formed
in two sections, between which the ends are clamped. By the latter construction
the chart may be removed and a new one substituted without removing the rolls
from the frame.
When the device is designed for use in kindergarten and primary departments, a
series of parallel wires or rods may be supported between the posts above the black-
board and chart, and on which may be arranged to slide a number of beads and
blocks illustrating geometrical figures.
The posts may be formed with a greater vertical extension and with ways or
grooves in which the frame may be slid vertically to bring it at different heights.
The adjustment may be secured by set screws.
In the construction first described the frame may be entirely inverted on its
bearings to expose either the chart or the blackboard, as may be desired.
Dated this 18th day of January 1893.

page_text: COMPLETE SPECIFICATION.
Improvements in a Combined Chart and Blackboard.
I, REGINALD WALTER BARKER, of Monument Chambers, King William
Street, London, Middlesex, 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 bas relation to certain new and useful improvements in educational
appliances; and it consists in the novel construction and combination of parts, as
hereinafter specified.
The invention more particularly relates to a combination blackboard and chart
device designed for use in schools of all characters and in other places as an aid to
instruction in any particular branch or branches.
Figure 1 of the drawings is an elevation of one side of the device.
Fig. 2 is a similar view of the other side.
Fig. 3 is a modified form.
In the accompanying drawings the letter A designates the base, having feet a,
which are usually provided with castors in order to facilitate the moving of the
device from place to place and into the desired position. Rising from each end
portion of the base are uprights or posts B B.
C designates a rectangular frame havings bearings in its lateral edges at the
central portion thereof, which are loosely engaged by pivot-studs c in the posts B B,
whereby the said frame is capable of a free swinging movement between said posts..
The studs care preferably small thumb or set screws, which may be brought into
sufficient engagement with the bearings to support the frame at any desired angle
for facilitating the exposure of the matter upon the chart and blackboard, now to
be described.
D designates the blackboard, which is secured firmly to one side of the frame C,
and consists of a rigid back having a blackboard surface.
E designates the chart, which consists of a single elongated piece of broad_web
or ribbon of flexible material, on which is printed or stamped any kind of
educational matter, such as maps, diagrams, phonetic and grammatical exercises,
anatomical figures, &c. This web or ribbon is carried by vertical rollers F F-one
at each end, and journalled loosely in the frame at their ends. The upper end of
each roller carries a crank, by the operation of which the web or ribbon forming
the chart may be turned to expose the desired part of its surface. The movement
of the rollers F F is properly retarded by means of spring-pressed brakes 9,
pressing against their upper portions.
The chart may be tacked to the rolls at its ends, or said rolls may each be formed
in two sections, between which the ends are clamped. By the latter construction the
chart may be removed and a new one substituted without removing the rolls from
the frame.
When the device is designed for use in kindergarten and primary departments, a
series of parallel wires or rods H may be supported between the posts B B above
the blackboard and chart, and on which may be arranged to slide a number of
beads and blocks 1, illustrating geometrical figures.
In Fig. 3 I have shown the posts B B as having a greater vertical extension and
formed with ways or grooves k, as indicated by the dotted lines, in which the frame C
may be slid vertically to bring it at different heights. The adjustment may be
secured by set-screws k¹.
In the construction first described the frame C may be entirely inverted on its
bearings to expose either the chart or the blackboard, as may be desired,

page_text: 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. In an educational device, the combination, with the movable supporting frame
having the upright posts B B, of a rectangular reversible frame C, adjustably
supported between said posts, the rollers journalled one near each vertical edge of
said frame, the cranks f on the upper ends of said rollers, the spring pressed
brakes 99, acting against the upper portions of said rollers, and the chart carried
by said rollers, substantially as specified.
2. The improvements in a combined chart and blackboard, substantially as
and for the purposes herein before described, set forth, and illustrated in the
drawings annexed.
Dated this 19th day of October 1893.
REGINALD W. BARKER.