An Improved Instrument for Levelling, Bevelling, and Plumbing.
Year: 1894

page_text: Date of Application, 27th June, 1894
Complete Specification Left, 25th Mar., 1895-Accepted, 22nd June, 1895
PROVISIONAL SPECIFICATION.
An Improved Instrument for Levelling, Bevelling, and Plumbing.
We FRANCIS. JOHN RYAN and. FRANCIS JOHN RYAN Junior of the Firm of
Ryan Bros. Hill Brow, Plough Road Clapham Junction, London S.W. Builders
Decorators and Sanitary Engineers do hereby declare the nature of this invention
to be as follows:
:―
It consists in a spirit level being inserted in each edge of the stock of an
instrument like an ordinary set square which gives accurately the perpendicular
line of any object against which it placed. It may be made with a loose or
folding straight edge hinged on a bolt or suitable screw at the end of the blade or
longest arm of the square and fastened by a quadrant or other suitable arrange-
ment at the stock end by means of which it will give any required angle for the
building of retaining walls or chimney shafts.
The loose blade may be arranged to work between two straight edges and open
and fold in the manner of a razor.
The whole may be made of any suitable material.
FRANCIS JOHN RYAN.
FRANCIS JOHN RYAN, JUN..
An Improved Instrument for Levelling, Bevelling, and Plumbing.
We FRANCIS JOHN RYAN and FRANCIS JOHN RYAN Junior of the Firm of
Ryan Bros. "Hill Brow" Plough Road Clapham Junction London S.W. Builders
Decorators and Sanitary Engineers 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 :-
Fig. 1 represents the instrument when used as a plumb rule level or square.
Fig. 2 shows the instrument with the loose arm or batten extended for use as a
bevel, drain or hanging level, and battering plumb rule.
Fig. 3 represents the side elevation.
It consists in a spirit level a a a being inserted in each edge of the stock of a
set square A A so as to enable operatives in the building of walls or other erections
to prove the perpendicular or any bevel of the same. The bevel is obtained by
an extra batten or straight edge C which is attached to the long arm of the
square D and is hinged or bolted at the extreme end of the arm and made fast and
held in any required position by a fly nut E. It is moved or worked at the stock
end by a metal plate F being fastened to the batten or straight edge through
which another bolt is passed; a slot or space is hollowed out of this metal plate
sufficiently wide to form the quadrant G and allow the plate free passage over the
bolt and by means of a fly nut E' may be screwed down and held to any angle the
slot is made larger at the extreme end H to enable the quadrant or metal plate to
be lifted over the shoulder of the fly nut when a larger angle than that allowed by
the slot is required.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that we do not
claim for our invention, any of the parts forming this instrument, all of them
having before been used for various purposes, but what we do claim as our
invention is,
The combination of the parts herein described and shown in the accompanying
FRANCIS JOHN RYAN,
FRANCIS JOHN RYAN, JUNIOR,
"Hill Brow," Plough Road, Clapham Junction, London, S.W.