Improvements in Rulers.
Year: 1890

page_text: Date of Application, 24th Oct., 1890
Complete Specification Left, 21st July, 1891-Accepted, 29th Aug., 1891
PROVISIONAL SPECIFICATION.
Improvements in Rulers.
JOHN ARTHUR RUDD 128 Hope Street Glasgow N.B. Engineer, do hereby
declare the nature of this invention to be as follows:-
My invention consists of placing on an ordinary cylindrical ruler two rings or
cylinders of equal diameter and thickness concentric with the ruler and fitting it in
such a way that, though not free to slide along the ruler of themselves, they can be
readily moved from one end of the ruler to the other and to any distance apart
within the length of the ruler. The rings or cylinders will be of such material and
construction as will not readily slip when rolling over the surface to be ruled.
The object of the rings or cylinders is to ensure the ruler being parallel, prevent
it slipping, and raise it up clear of the surface to be ruled in order that it may
not blot in case of it taking ink from the pen, or in case of a previously ruled part
requiring to be gone over again before dry. The rings are made movable in order
that they may be set to the width of the paper to be ruled.
The ends of the ruler may be provided with a suitable arrangement such as
rims, discs, or other projections to prevent the rings or cylinders being lost.
Dated this Twenty-third day of October 1890.
J. A. RUDD.
COMPLETE SPECIFICATION.
Improvements in Rulers.
I, JOHN ARTHUR RUDD of 128 Hope Street Glasgow, N.B. Engineer 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 its object as follows a
(1) To keep the ruler parallel.
(2) To prevent it slipping.
:-
(3) To raise it up clear of the surface to be ruled in order that it
may not blot
in case of it taking ink from the pen, or in case of a previously ruled part requiring
to be gone over again before dry.
In order that my invention may be properly understood and readily carried into
effect I have hereunto appended drawings on the several figures of which corre-
sponding parts are marked with the same letters of reference.
Fig. 1. is a front elevation of ruler.
Fig. 2. is an end elevation of ring or cylinder.
Fig. 3. is a front elevation of ruler with the rings or cylinders thereon.
I will here explain the operation of the parts of the ruler and how the same
may be used.
Fig. 1 is an ordinary ruler 12 inches long and 2 inch in diameter on which are
placed two rings or cylinders a (Figs. 2 and 3) of equal diameter and thickness,
concentric with the ruler and fitting it in such a way that though not free to slide
along the ruler of themselves, they can be readily moved from one end of the ruler
to the other, and to any distance apart, within the length of the ruler. The rings
or cylinders will be of such material and construction as will not readily slip when
rolling over the surface to be ruled.
The rings are made moveable in order that they may be set to the width of the
paper to be ruled.

page_text: The ends of the ruler may be provided with a suitable arrangement such as
rims, discs or other projections to prevent the rings or cylinders being lost.
The rulers may be of any wood or metal or other material and of any length or
diameter.
The rings or cylinders may be of india-rubber or other suitable material or
materials.
The rings or cylinders may be either both free as above described or one free
and one fixed.
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. The general arrangement and construction of rulers, substantially as herein-
before described and shewn in Figs. 1. 2. and 3 of the annexed drawings.
2. The application of rings or cylinders made of indiarubber or other suitable
material or materials to rulers either both free or one free and one fixed to ensure
their running parallel.
3. The application of rings or cylinders made of indiarubber or other suitable
material or materials to rulers either both free or one free and one fixed to prevent
them slipping.
4. The application of rings or cylinders made of indiarubber or other suitable
material or materials to rulers either both free or one free and one fixed to raise
the ruler up clear of the surface to be ruled in order that it may not blot in case of
it taking ink from the pen or a previously ruled part requiring to be gone over
again before dry.
Dated this the Savantsanth dow of I.J. 1001