IM- PROVEMENTS IN CYLINDRICAL AND OTHER RULERS FOR OFFICE AND GENERAL USE
Year: 1872

page_text: PROVISIONAL SPECIFICATION left by George Yule at the Office of the
Commissioners of Patents, with his Petition, on the 27th June
1872.
I, GEORGE YULE, of Wakefield Street, London, in the County of
Middlesex, do hereby declare the nature of the said Invention for "IM-
PROVEMENTS IN CYLINDRICAL AND OTHER RULERS FOR OFFICE AND GENERAL USE,"
to be as follows:-
The face of the ruler instead of resting on and being in contact with
the paper, parchment, or other surface, while said paper, parchment, or
other surface is being ruled with straight lines, shall be raised above the
same, and kept entirely clear thereof.
The means by which said object is to be effected shall be as follows,
namely:
In cylindrical rulers, both ends of the ruler to the extent or for the
space or distance of half an inch or thereby, more or less, shall be made
or formed of a greater circumference than the body of the ruler (the
"body" being understood to mean that part other than the said ends), and
both such ends shall have the same circumference, and be of equal size.
And the ruler shall rest solely on these ends. Or otherwise, to adjust on
the ruler two rings or circular cursors of brass, wood, or other suitable

page_text: material, or combination of materials of the necessary circumference and
dimensions, which rings or circular cursors shall have the same circum-
ference and be of equal size, and shall be in lieu and place of the
two fixed ends above specified and described, said rings or circular
cursors or either of them being either free so as to slide along the ruler
or fixed to the ends thereof. And the ruler shall rest solely on these
rings or circular cursors. To confine such rings or circular cursors as
are free to slide along the ruler to their place thereon, and prevent their
sliding off, a circular bar or stop with sufficient projection shall be placed
at the required end or extremity of the ruler.
In other rulers, that is, any other shape or form of ruler for drawing
straight lines, whose face as at present in use rests on or is in contact
with the surface being ruled, and the longitudinal boundary lines of
whose sides or surfaces are straight lines, parallel to one another by the
adjustment thereon of two cursors of brass, wood, or other suitable
material, or combination of materials of suitable form and size, said
cursors or either of them being either free so as to slide along the ruler
or fixed at the ends thereof; and the requisite bar or stop at the required
extremity or extremities of the ruler to confine such cursor or cursors as
are free to their place on the ruler, and prevent their sliding off the same
or otherwise, and simply by adjusting or forming on the ruler fixed block
rests, one at each end, in place of said cursors, and said rulers shall rest
solely on said cursors or block rests.
The above specified improvements are for the use, end, or purpose of
preventing the blotting and smudging of the paper or other surface
being ruled through the ruler receiving on its face or edge ink from the
pen, or through its face or edge getting otherwise inked or getting
dirtied, or receiving or contracting extraneous matter, and communi-
cating the said ink or dirt, or extraneous matter to the said paper or
other surface in its contact therewith, and also for enabling the operator
or person ruling to rule with straight lines a written or other surface on
which the ink has not already dried, without blotting or smudging the
said surface.