Year: 1887

page_text: Date of Application, 17th May, 1887
Complete Left, 17th Feb., 1888
Complete Accepted, 23rd Mar., 1888
1, WILLIAM MILLER WALTERS, of Chew Stoke, in the County of Somerset, master
mariner, do hereby declare the nature of this invention to be as follows:-
The improved anemometer in which this invention consists is constructed and
arranged as follows:-
Partially enclosed in a suitable case or box is a flat sided spindle which, towards
what may conveniently be termed its rear end, is connected to spiral springs fitted in
the case.
At the front the spindle is extended through and beyond the end of the case and
receives at its extremity a disc which is clamped or otherwise secured on the end of
the spindle. The instrument is so mounted that when placed in the proper position
on the rail of a ship or in any other convenient place for use it is capable of being
turned so as to bring the disc to face any quarter from which the wind may blow and
to assume any desired angle of inclination.
Within the case the spindle is slotted and the upper face of the slot is furnished
with teeth which gear with the teeth of a pinion centred upon the axis of the pointer
or index of a properly graduated dial.
Under the pressure exerted by the wind acting upon the disc at the outer end
thereof the spindle is forced back in the box, the springs yielding accordingly. The
pointer of the dial is thus moved and the pressure of the wind indicated by the figures
on the dial. As the pressure is relaxed the springs return the spindle and when the
latter is in its normal position a guard plate or flange with which it is fitted bears
against the inner face of the case. When in this position the pointer of the dial
stands at zero.
The disc on which the wind pressure is received may vary in size as may be
required, a larger disc being preferred for use with a light wind than that adopted in
.

page_text: a wind of high velocity. The dial is graduated with reference to the area of the disc
and the elasticity of the springs. The same dial may be used with discs of different
area, the graduations being read on different circles and representing different values
accordingly.
The spindle is maintained in its proper plane by guides between which it travels.
As convenient guides for this purpose pieces of metal may be employed which are
hinged at one end to set screws screwed into the sides of the case, and at the other
end bear against the sides of the spindle. These guides may be disposed at various
points in the case.
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.

page_text: I, WILLIAM MILLER WALTERS of Chew Stoke in the County of Somerset Master
Mariner 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:
The improved anemometer in which this invention consists is constructed and
arranged as follows:-
For the purpose of measuring the direct pressure of the wind I mount a disc on a
horizontal spindle which is suitably guided, one or more springs being arranged to
counterbalance the wind pressure against the disc and a pointer being actuated by
and in accordance with the longitudinal motion of the spindle when its disc is acted
on by the wind pressure this pointer indicating the amount or force of the wind on a
dial. The spindle and parts connected therewith are by preference enclosed in a case
so as to keep out the dust but with the disc end of the spindle protruding through one
end of the case, this latter or an equivalent framing for the apparatus being mounted
on a stand or socket on the ship's rail or in any other convenient place in such a
manner that it can be adjusted according to the direction of the wind.
And in order that my invention may be fully understood and readily carried into
effect I shall now proceed to describe an anemometer constructed in accordance there-
with, Figure 1 being a vertical longitudinal elevation, Figure 2 a cross section,
Figure 3 a face view of the four discs used for wind of different pressure or force,
Figure 4 a face view of the dial, Figures 5 and 6 are longitudinal sections shewing
modified arrangements.
Partially enclosed in a suitable case or box A is a flat sided spindle B which
towards what may be conveniently termed its roar end is connected to spiral springs C C
fitted in the case A.
At the front the spindle B is extended through and beyond the end of the case A
and receives at its extremity a disc D which by a screw d is clamped or otherwise
secured on the end of the spindle B. The outer circle and the three dotted circles
indicate four different sizes of dial to be used. The instrument is mounted by pivots G
on a stand E which can be turned round on its vertical axis being held in place by
the plate F. This latter is fixed to the rail of a ship or in any other convenient place
and by turning the stand E round its vertical axis and by turning the case A around
the pivots G the disc D can be brought to face any quarter from which the wind may
blow and to assume any desired angle of inclination.
Within the case A the spindle B is slotted, and the upper face of the slot is furnished
with teeth which gear with the teeth of a pinion H centred upon the axis of the pointer
or index I of a properly graduated dial L.
Under the pressure exerted by the wind acting upon the disc D on the outer side
thereof the spindle B is forced back in the box A the springs C yielding accordingly.
The pointer I of the dial L is thus moved and the pressure of the wind indicated by

page_text: the figures on the dial. As the pressure is relaxed the springs return the spindle B
and when the latter is in its normal position a guard plate or flange K with which it
is fitted bears against the inner face of the case. When in this position the pointer of
the dial stands at zero.
The disc D on which the wind pressure is received may vary in size as may be
required, or larger disc being preferred for use with a light wind than that adopted
in a wind of a high velocity. The dial L is graduated with reference to the area of
the disc and the elasticity of the springs. The same dial may be used with discs of
different area the graduations being read on different articles and representing different
values accordingly.
I have here in Figure 3 as an example shewn four dials graduated on one disc L.
In order that one set of springs may take the wide range of from zero to say 100 lbs.
to the square foot I use therewith four different discs D of different sizes but same
weight. In an increasing wind a large disc D having an area of 144 square inches
would be used which I would mark "First Reef." and which would be on the
spindle B until the pointer I made the complete circle on the dial L registering
12 lbs. per square foot. I then take off this disc and put on instead a disc marked
"Second Reef" and containing 72 square inches or square foot the indications then
being read on the second circle which goes up to 25 lbs. per square foot and so on up
to 100 lbs. and the smallest or close reef disc D the indications then being read off
the fourth circle corresponding to close reef. The springs can thus never have greater
strain than 12 lbs. on them.
The spindle is guided partly by passing through the end of the case and partly by
the adjustable rollers M which are pinned to small carriages N which by set screws O
screwed into the sides of the case A can be adjusted so that the rollers M bear against
the sides of the spindle. These guide rollers are here shewn four in number. Any
other suitable means for guiding may be adopted as will be well understood. Instead
of the arrangement of springs here shewn I may use only one at or in the end of the
bar B.
In Figure 5 the bar B is guided by sector shaped pieces M which are hinged at
one end to small carriages N which by means of set screws 0 screwed into the sides
of the case can be set up so as to bear against the sides of the spindle B.
Figure 6 shews another spring arrangement the bar B being formed hollow in the
rear for containing a helical spring C and guided in the socket M.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is :-
First: An anemometer consisting mainly of a disc adapted in size to the pressure
of the wind and mounted on a suitably guided horizontal spindle the wind pressure
being counterbalanced by a spring or springs and the longitudinal movement of the
spindle effecting an indication of the wind pressure on a dial substantially as set
forth.
Second-The constructions of anemometer described with reference to the accom-
panying drawings substantially as set forth.
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