A Continuous writing Board or Surface.
Year: 1896

page_text: Date of Application, 5th Oct., 1895
*Complete Specification Left, 5th Dec., 1896-Accepted, 13th Mar.. 1897
I JOHN CHARLES TARVER M.A. Head Master of School, of the Red House
Darlington, do hereby declare the nature of this invention to be as follows:-
A continuous belt of linoleum or other pliable substance passing over two
rollers. The rollers are placed vertically above one another, and attached to a
movable easel or to a wall by adjustable bearings in such a way as to revolve on
those bearings.
The hearings are adjusted by screws so as to tighten or release the belt.
The lower roller is furnished with a crank and handle, and by its revolution
imparts motion to the belt; the person using the invention is thus able to write
or draw diagrams at a level convenient to himself, and to cause the drawing or
written matter to move upwards or downwards with the belt. The invention
consists in the combination of the rollers with the adjustable bearings and with
the continuous belt.
D
י
W. LLOYD WISE,
46 Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.
A Continuous writing Board or Surface.
I, JOHN CHARLES TARVER, M.A., Head Master of School of the Red House,
Darlington, in the County of Durham, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement :-
A continuous belt of linoleum or other pliable substance passing over two
rollers. The rollers are placed one above the other, and attached to a moveable
easel, or to a wall, by adjustable bearings, in such a way as to revolve on those
bearings.
The bearings are adjusted by screws, so as to tighten or release the belt.
The lower roller is furnished with a crank aud handle, and by its revolution
imparts motion to the belt; the person using the invention is thus able to write
or draw diagrams at a level convenient to himself and to cause the drawing or
written matter to move upwards or downwards with the belt. The invention
consists in the combination of the rollers with the adjustable bearings, and with
the continuous belt.

page_text: Fig. 1 is a side elevation of the apparatus, Fig. 2 a front elevation with the
lower left hand adjustable bearing in section, and Fig. 3 is a half section in plan
of same.
Figs. 4 and 5 shew a side and front view respectively of one of the adjustable
bearings as a casting in one piece, provided with springs to give elastic tension in
tightening the sheet upon the rollers.
The same letters indicate similar parts on each fig.
A. is the continuous belt or sheet with prepared external surface for drawing
or writing upon, mounted upon two rollers B. B', the former carried in fixed
bearings CC and the other in adjustable bearings C¹ C' each adjustable inde-
pendently of the other in the brackets D. D. by means of screwed eye bolts E. E.
fitted with wing nuts F. F. the projecting ends of the roller spindle G. passing
through the eye of the bolts E. E. at each end. When the sheet A. becomes
slack by stretching it is tightened by operating the wing nuts F. F. which abut
against fixed washers H. H. upon the screws of the eye bolts, and this tightening
can be effected independently to suit the slackness of either side which is an
important feature, because the flexible sheet is very liable to stretch unequally at
the sides by the rollers not being of exactly equal diameter or by warping, the
tendency being to "surge" to one side or other and work off the roller which is
prevented by independent adjustment at each side.
Figs. 4 and 5 shew the brackets D. D., instead of being in two pieces (as in
Figs. 1, 2, and 3), made of a light casting preferably of brass, in one piece and
polished or lacquered. The elastic tension may be obtained by an elliptical
spring K. against which the wing_nut F. abuts or by a light coiled spring K¹
around the shank of the eye bolt E. as shewn on Fig. 4, and this elastic action
will be found of advantage over the rigid attachment of the eye bolts to the
roller spindle.
The rollers and sheet as shewn on Figs. 1 and 2 are mounted, at a convenient
slope for drawing or writing, upon a portable frame L. which may be on castors so
as to be readily removed to any desired position, and may have fitted in it a drawer
or drawers M. to hold the instruments required, but the apparatus may be fixed
against a wall or may be fitted like au easel at any desired slope.
The roller B being revolved by the handle N. any part of the continuous
surface can be brought to a convenient height for the lecturer or demonstrator to
work upon, and the sheet always kept at the proper tightness to provide a firm
surface by the adjustment of the ends of the lower roller.
Having now particularly described and ascertained the nature of said inven
tion and in what manner the same is to be performed, I declare that what I
claim is :-
A continuous writing or drawing board or surface, comprising a flexible con-
tinuous belt or sheet, mounted upon rollers, one of which being revolved moves the
writing or drawing surface of the belt or sheet upward or downward to any required
position, in combination with adjustable bearings by which the tension on either side
can be adjusted independently of the other side, and with or without springs to give
elastic tension, substantially as described and shewn.
Dated this 5th day of December 1906
T. J. DANSON, F. Inst. P.A.,
Newcastle-upon-Tyne, Agent for Applicant.