An Improved Olinometer, applicable also as a. Plumb-level and Rule.
Year: 1892

page_text: Date of Application, 18th Mar., 1892-Accepted, 23rd Apr., 1892
COMPLETE SPECIFICATION.
An Improved Olinometer, applicable also as a. Plumb-level and
Rule.
I, MATHIAS MARTIN, a Doctor of Medicine, citizen of the United States,
residing at Austin, Corner Main and Driscoll Streets, County of Travis, State of
Texas, 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 consists in an improved form of "clinometer or a combined
gravity plumb level and rule, adapted to serve the purposes of a plumb level or
rule, combining the two tools in one.
-
Referring to the accompanying drawing :-
Fig. 1 is a central sectional view, on an enlarged scale, taken on line 2-2 of
Fig. 3.
Fig. 2 is a perspective view of one of the glass discs, taken from the inner side.
thereof.
Fig. 3 is a side elevation of my clinometer.
Referring to the several parts by letter:-
A indicates a wooden rule, formed with the central opening A', in which the
discs and weighted needle are mounted.
The glass discs B, B, which form both the bearings for the weighted needle and
base for the graduated scale, are formed with their outer faces level, while the
inner side of each disc has an annular recess B', which deepens from the centre of
the disc to the point b, near its circumference, leaving the inwardly-extending rim
or flange B around the circumference of the disc. At the centre of each disc, on
its inner side, is forned an aperture or recess b.
When the opening A', is formed in the rule A, a thin annular strip A' is left, as
shown in the sectional view, Fig. 1, and when the discs B are placed in the
opening B', from each side thereof their flanges B' come in contact with this strip.
The weighted needle C is placed in position between the two discs, the ends of its
central pivot e fitting in the recesses b', at the centre of the two glass discs. The
discs are then secured in position by the flat metal rings D, D, which are held by
screws d.
Around the inner face of each glass disc B, at the deepest point of its recess B',
is marked in a circle a scale E, and these scales are of course visible through the
transparent discs.
Along the centre of each side of the wooden rule is marked a longitudinal plumb
line F.
It will now be seen that the weighted needle, pivotally supported between the
glass discs on which the scales are marked, will turn, by gravity, so as to always
indicate on the scales E precisely the angle at which the rule is held; also, by
holding the rule vertically, with the point of the needle in line with the longitudinal
plumb line F on the side of the rule, my device will serve, and can be used for, all
the purposes of the ordinary plumb line.
It will be seen that my invention will serve the combined purposes of a spirit
level and a plumb line.
The peculiar construction of the glass discs B causes them to. furnish a
bearing to the weighted needle and also serve as dials by which the inclination of
the needle is registered.

page_text: 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 :-
The combination of the rule formed with the central opening A. and the annular
strip A in said opening, the glass discs B, formed on their inner sides with the
annular recesses B', which increase in depth as they extend outward, and having
the scales E marked upon them, and the weighted needle pivotally supported
between the glass discs, substantially as set forth.
Dated this 17th day of March 1900
H. D. FITZPATRICK,
70, Wellington Street, Glasgow, Agent.