Improvements in Apparatus Serving as a Continuous Black Board for Use in Schools and Lecture Halls, with Automatic Cleaning Appliance Attached.
Year: 1888

page_text: Date of Application, 28th July, 1888
Complete Specification Left, 27th Apr., 1889-Accepted, 15th June, 1889
PROVISIONAL SPECIFICATION.
Improvements in Apparatus Serving as a Continuous Black Board
for Use in Schools and Lecture Halls, with Automatic Cleaning
Appliance Attached.
I, JAMES WEIGHTMAN of 7 Pilgrim Street in the City and County of Newcastle-
upon-Tyne Cabinet Maker and Upholsterer, do hereby declare the nature of this
invention to be as follows :-
A vertical Rectangular Frame of wood or other suitable material, on which a pair
of rollers are mounted transversely, the one at the upper, and the other near the lower
extremity. Over these rollers I stretch an endless web or sheet of Linoleum, or other
suitable material, for drawing or writing upon.-This web or sheet is kept at the
required degree of tension by making the lower roller adjustable, so that the distance
between the two rollers may be varied to any required extent. To do this, I propose
preferably to mount the lower roller in a pair of eccentrics attached to the frame in
such manner that the movement of a lever in one direction shall increase the tension
on the endless sheet or web, and the movement of the same lever in the opposite
direction shall diminish or entirely relieve the strain upon it.
The same object may be accomplished by pivotting the lower roller in a pair of
short levers operating in the same manner and to the same degree as the eccentrics, or,
it may be accomplished by attaching suitable weights to sliding blocks carrying the
ends of the lower roller.
When one part of the endless sheet or web has been covered with drawings or
writing and a new, or unused part is required, a handle or crank attached to one end
of the lower roller is revolved which turns the roller and causes the endless web or
sheet to pass over the pair of rollers, thus causing the part drawn, or written upon
to disappear and bringing a new or unused part of the sheet or web before, and
within convenient reach of, the teacher or lecturer.
I also propose to attach to frame behind the endless web or sheet an arrangement of
brush, sponge or rubber which, when required, will obliterate the drawing or writing
which has served its purpose, so that the continued revolution of the rollers always
brings a clean part of the endless sheet or web of linoleum or other material used in
front of the operator.
Dated this Twenty-sixth day of July in the year 1888.
COMPLETE SPECIFICATION.
Improvements in Apparatus Serving as a Continuous Black Board
for Use in Schools and Lecture Halls, with Automatic Cleaning
Appliance Attached.
1, JAMES WEIGHTMAN. of No. 7 Pilgrim Street in the City & County of Newcastle-
upon-Tyne, Cabinet Maker and Upholsterer, 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 :—
A vertical rectangular frame of wood or other suitable material, on which a pair
of rollers are mounted transversely, the one at the upper, and the other near the
lower extremity. Over these rollers I stretch an endless web or sheet of linoleum
or other suitable material for drawing or writing upon.
This web or sheet is kept at the required degree of tension by making the lower
roller adjustable, so that the distance between the two rollers, may be varied to any
reanired extent.

page_text: To do this, I propose preferable to mount the lower roller in a pair of eccentrics
attached to the frame in such manner that the movement of a lever in one direction
shall increase the tension on the endless sheet or web, and the movement of the
same lever in the opposite direction shall diminish or entirely relieve the strain
upon it.
The same object may be accomplished by pivotting the lower roller in a pair of
short levers operating in the same manner and to the same degree as the eccentrics
or it may be accomplished by attaching suitable weights. to sliding blocks carrying
the ends of the lower roller.
When one part of the endless sheet or web has been covered with drawing or
writing and a new or unused part is required, a handle or crank attached to one end
of the lower roller is revolved and causes the endless web or sheet to pass over the
pair of rollers thus causing the part drawn or written upon, to disappear and bringing
a new or unused part of the sheet or web before and within convenient reach of the
teacher or lecturer.
I also propose to attach to fraine behind the endless web or sheet an arrangement
of brush, sponge or rubber, which when required will obliterate the drawing or writing
which has served its purpose, so that the continued revolution of the rollers always
brings a clean part of the endless sheet or web of linoleum or other material used in
front of the operator.
The drawing illustrates what I believe to be the best, but not the only mode of
constructing, and operating my invention.
The same lettering applies to both views, A. A. is the rectangular frame, B. B. the
rollers mounted transversely to the frame, C. C. endless web or sheet of linoleum or
other suitable material, D. D arrangement of levers for adjusting the tension of the
web of linoleum, E. E. crank for revolving the lower roller so as to bring a new or
unused part of the sheet before the operator.
The brush or sponge for obliterating the drawing or writing which has served its
purpose is not shown on the drawing, but is placed transversely across the frame
immediately behind and in line with the upper fixed roller, and by the movement of a
lever is placed in contact with or withdrawn from the endless web or sheet so that the
drawing or writing may be obliterated or allowed to remain as may be required.
Having thus described the nature of my invention and the manner in which it is
used, what I claim is
The construction of the apparatus for the purpose specified, substantially as
described.
Dated this Twenty sixth day of April in the year 1889.