Improvements in and relating to School Slates, Black-boards, and the like.
Year: 1898

page_text: Date of Application, 6th Aug., 1898-Accepted, 10th Sept., 1898
COMPLETE SPECIFICATION.
Improvements in and relating to School Slates, Black-boards, and
the like.
I, WILLIAM MEYER, of Arnis, Holstein, in the German Empire, Teacher, 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, reference being had to the accompanying drawings and to the letters
and figures marked thereon, that is to say :-
This invention relates to school slates, black-boards, and the like, and it has for
its object to provide means whereby lines can be easily drawn or ruled thereon in
various ways, say for instance at equal distances apart, without the employment of
any special auxiliary means.
I attain this object by providing the slate, or the like, with a frame having
grooves in its opposite sides, and forming therein series of holes at appropriate
distances apart, so as to correspond to the lines to be drawn on the slate.
A ruler adapted to be used in conjunction with the slate or board is provided
with pins adapted to enter these holes in the frame, so as to obtain an effective hold
during the drawing or ruling of the lines.
The invention will be readily understood on reference to the accompanying
drawings in which
Fig. 1 represents in elevation a slate provided with my improved frame.
Fig. 2 shows, in side elevation, a ruler as used in connection with such slate.
Along the sides 2 and 3 of the slate frame, I provide any suitable number of
grooves, 1, 4, and so on, and in these grooves I form holes 5, at any appropriate
distances apart, so as to correspond to the lines to be drawn upon the slate. These
holes are preferably slightly conical or tapered, in order to better hold the pins of
the ruler when engaging therewith.
6, is the ruler, which is provides with pins 7 and 8, the distance apart of
which is arranged to correspond with that of the holes in the opposite sides of the
frame.
This improved frame is equally applicable to small and large slates, and to
boards, such for instance as boards of all kinds such for instance as boards of metal,
wood, parchment, paper, paste board, or the like.
It is not necessary,
that only two opposite sides of the frame be provided with
grooves and holes, as all its four sides may, for certain purposes, be arranged in
the same manner, as for instance for producing transverse ruling for scale
drawing.
All that is necessary for operating the device is, to successively insert the pins
of the ruler into the respective holes of the corresponding grooves, and then move
the ruler down, in the ordinary manner, step by step.
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 :-
c
.
1 alaton block boondo and the like having a
out in

page_text: its sides (either on two corresponding sides or on all four sides), in which are formed
correspondingly arranged holes to receive pins on a suitable ruler, substantially as
and for the purpose described.
2. My improved frame for school slates, black-boards, and the like, substantially
as described with reference to the accompanying drawings.
ERNEST DE PASS,
Chartered Patent Agent, 78, Fleet Street, London, and
5A, Market Street, Nottingham,
Agent for the Applicant.
ERNEST DE PASS,
Chartered Patent Agent, 78, Fleet Street, London, and
5A, Market Street, Nottingham,
Agent for the Applicant.