Improvements in Anemometers.
Year: 1892

page_text: Date of Application, 3rd Dec., 1892
Complete Specification Left, 4th Sept., 1893-Accepted, 4th Nov., 1893
PROVISIONAL SPECIFICATION.
Improvements in Anemometers.
I, ANDREW PEARSON, H.M. Inspector of Mines, Rutherglen, in the County of
Lanark, North Britain, do hereby declare the nature of this invention to be as
follows:
:-
This invention relates to improvements in anemometers, and is more particularly
intended to apply to pocket anemometers. The object of the invention is to
provide a means of disconnecting the indicating part from the vane at any time.
In carrying out my invention I pivot a lever or arm to any convenient part of the
framework. To the inner end of this arm I pivot a toothed wheel or pinion, which
by the motion of the other end of the arm may be brought into gear with the
pinion on one axle of the indicating part, and also with a pinion on the axle of the
vane. When in this position the motion of the vane is communicated to the wheel-
work of the indicating part. By moving the arm in the opposite direction the
pinion pivoted to it is disconnected from the pinion on the axle of the vane, and
the pinion on the axle of the indicator and the vane is free to turn round without
communicating motion to the indicator.
Dated this 2nd day of December 1892.
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Agents.
COMPLETE SPECIFICATION.
Improvements in Anemometers.
I, ANDREW PEARSON, H.M. Inspector of Mines, Rutherglen, in the County of
Lanark, North Britain, 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 relates to improvements in anemonieters, and is more particularly
intended to apply to pocket anemometers. The object of the invention is to
provide a means of disconnecting the indicating part from the vane at any time.
In carrying out my invention I pivot a lever or arm to any convenient part of the
framework. To the inner end of this arm I pivot a toothed wheel or pinion, which
by the motion of the other end of the arm may be brought into gear with the
pinion on one axle of the indicating part and also with a pinion on the axle of the
vane.
In order that my invention may be properly understood and readily carried into
effect I have hereunto appended an explanatory sheet of drawing which I will now
proceed to describe.
Figure 1 is a front elevation of the anemometer.
Figure 2 is a section of the same.
a is the lever, which is pivoted at b. The inner end of this lever a is connected
to the toothed wheel or pinion c, so that by the motion of the arm or lever a¹ the
pinion c may be brought into gear with the pinion d on the axle e of the indicating
part, and also with the pinion on the axle of the vanes g, but not seen in the
drawings, being immediately over the pinion d. When in this position the motion
of the vane g is communicated to the wheelwork of the indicating part. By moving
the arm or lever a² in the opposite direction the pinion e pivoted to it is dis-
connected from the pinion on the axle of the vane, and the pinion d on the axle e

page_text: of the indicator and the vane g is free to turn round without communicating motion
to the indicator.
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 :-
In anemometers, the arrangement whereby the indicating part may be dis-
connected from the vane at any time, substantially as described and illustrated on
the accompanying sheet of drawing.
Dated this 2nd day of September 1893.
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Agents.