Year: 1896

page_text: Date of Application; 5th Sept., 1896
Complete Specification Left, 5th June, 1897-Accepted, 17th July, 1897
I SIDNEY RICHARDSON of 19 Cross Street, Hatton Garden, in the County of
London, Optician, do hereby declare the nature of the said invention to be as
follows:-
The invention has for its object improvements in aneroid barometers with a view
to obtain a more open scale, that is to say a greater motion of the index hand for a
given rise and fall in pressure.
For this purpose instead of connecting the lever ari directly with the spring
connected with the vaccuum chamber I mount the said lever arm near to the said
spring on a pivot or pivots carried by a fixed support and I connect the shorter end of
said lever arm by a pivot or pivots with the said spring. The longer or outer end of
the lever arm is connected with the index hand and gives motion thereto by the usual
means.
If desired in order to obtain a still more open range I may connect the outer end of
the lever arm to another somewhat similar arrangement of lever mechanism.
Dated September 5, 1896.
HARRIS & MILLS,
23 Southampton Buildings, London, W.C., Agents for the Applicant.
I, SIDNEY RICHARDSON, of 19 Cross Street, Hatton Garden, in the County of
London, Optician, 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 invention has for its object improvements in aneroid barometers with a view to
obtain a more open scale, that is to say, a greater motion of the index hand for a
given rise and fall in pressure.
My invention is illustrated in the accompanying drawings in which Fig. 1 is a plan
and Fig. 2 an elevation of an aneroid barometer provided with my improvements and
Fig. 3 is an elevation and Fig. 4 is a sectional elevation of parts of an aneroid
barometer showing a slight modification.
In all the figures like parts are indicated by similar letters of reference.
a is the base of the barometer, b the vacuum box fixed to such base and c the
spring fixed to a bar c¹ carried by adjustable screws and connected to the box b by
means of a central pillar b and cross pin 62 in the manner well understood.
Pin d71

page_text: According to my invention however instead of connecting the lever arm & directly
with the spring c as heretofore I mount the said lever arm near to the said spring on
a pivot or pivots d' carried according to the arrangement shown at Figs. 1 and 2 by
pillars el el on a support e fixed to the base a by means of pillars a¹ and screws a² and
as shown at Figs. 1 and 2 I connect the shorter end of said lever arm d by a pivot or
pivots d² to a fixture c³ on the spring c. The longer.end of the lever arin d is connected
by a link d³ to a short arm f¹ on a rocking spindle f mounted on pivots carried by
pillars a³, to which spindle an arın f is fixed which at its upper end is connected
by wire and chain f to the pulley g² on the axis g of the hand or pointer g as
usual.
If desired in order to obtain a still more open range I may connect the outer end
of the lever arm & to another similar arrangement of lever mechanism.
In the modification represented at Figs. 3 and 4 the lever arm d is carried by a
spindle d extending across the box b and mounted on pivots d¹ carried by pillars a¹
and the shorter end of such lever arm d is connected by link h to a fixture c³ on
the spring c instead of being pivoted directly to such fixture. The other parts not
shown are similar to those represented in Figs. 1 and 2. It will be evident that
other means of communicating motion to the short end of the lever arm from
the spring may be adopted without departing from the peculiar character of my
invention.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performned I declare that what I claim is :-
1. In aneroid barometers the combination with the base, box and spring ordinarily
employed, of a lever arm mounted on a pivot or pivots carried by a fixed support,
such lever arm being connected by its short end with the spring and by its longer
end with means for operating the band or pointer substantially as herein set forth
and for the purpose stated.
2. In aneroid barometers the combination with the base, box and spring ordinarily
employed, of a lever arm mounted on a pivot or pivots carried by a fixed support
such lever arm being connected at its short end with the spring by means of a link
and at its longer end with means for operating the hand or pointer substantially as
herein shown and described and for the purpose stated.
3. In aneroid barometers the.improvements substantially as herein set forth and
for the purpose stated.
Dated this 5th day of June 1807
HARRIS & MILLS,
23 Southampton Buildings, London, W.C., Agents.