Improvements in Recording Barometers.
Year: 1891

page_text: Date claimed for Patent under Sect. 103 of Act,
being date of first Foreign Application (in
France).
-27th Oct.,
Date of Application (in United Kingdom), 28th Apr., 1891
1890
Complete Specification Left, 28th Jan., 1892-Accepted, 16th Apr., 1892
PROVISIONAL SPECIFICATION.
Improvements in Recording Barometers.
We, GEORGES MEYER and ANTOINE REDIER, both of 8 Cours des Petites
Ecuries, Paris, in the Republic of France, Clockmakers, do hereby declare the
nature of this invention to be as follows:-
The difficulty of registering the movements of the barometer is consequent on
the weakness of the motive action of the barometer itself, and our improvements
have for their object to provide a simple recording barometer whose recording pen
or instrument is uninfluenced by any friction against the recording surface,
and whose record is consequently true with the rise and fall of the barometric
pressure.
In carrying our invention into effect we employ an ordinary barometric box
provided with a regulating button for adjusting it. The plate upon which the
regulating button acts has mounted thereon, an axis carrying a pallet lever, which
bears upon a pin or stud soldered upon the upper plate of the barometric box. On
the said pallet lever axis is fixed a segmental toothed wheel or rack, which gears
with a pinion fixed on an axis carrying the hand or recording instrument.
The pallet lever, being put in motion by the changes of pressure acting thereon
through the barometric box, carries with it the segmental rack or toothed wheel,
which, gearing with the before mentioned pinion, causes the hand or recording
instrument to move to the right or left.
In connection with the apparatus above described is a registering cylinder,
upon which a sheet of paper is fixed or mounted in any convenient manner.
We preferably employ a sheet of paper printed with a scale or chart of length
equal to the circumference of the cylinder, and arranged say for a week's record,
and we make the paper of greater length than that of the circumference of
the cylinder and cement the two extremities thereof together, so as to form an
endless band.
The cylinder is supported only at one end and is free at the other; the endless
band of paper is passed over the free end of the cylinder and a small roller is
placed within it below the cylinder to give weight and stretch the paper; thus,
in the rotation of the cylinder, the paper is caused to turn in an endless manner.
The following are the arrangements adopted to obtain the dotting on the chart
or scale by means of a clock movement.
The clock movement is enclosed within the cylinder carrying the recording chart
or scale, and the cylinder turns around the axis of the clock movement.
The wheel work is an ordinary cylinder wheel work arranged so that at its centre,.
a solid axle can carry the cylinder, which latter is preferably caused to make one
revolution in a week.
A cross bar or hammer carried by arms mounted on an axis of motion, is
employed to depress, at determined periods, the hand or recording instrument;
this hammer has an arm attached thereto, which bears upon a double snail wheel
or cam, which makes one revolution per hour, per half hour, or other determined

page_text: period. In the revolution of the snail wheel or cam, the arm connected to the
hammer falls to the bottom of each part of the snail wheel or cam and, by means
of the hammer, depresses the pen or recording instrument and produces the dotting
on the chart or scale. In order to avoid the retention of the pen or recording
instrument in contact with the chart or scale for any perceptible time, the arm
acting with the snail wheel requires to be lifted immediately after its fall; this
is effected in the following manner. One arm of a kind of detent or double armned
lever, pushed by a spring, bears against the opposite part of the snail wheel and
escapes from it immediately after the fall of the hammer, and a second arm of this
Jever or detent instantaneously raises the arm connected to the hammer and thereby
raises the hammer out of contact with the pen or recording instrument, which latter
instantly rises out of contact with the chart or scale.
The chart or scale has the transverse lines printed in a curve corresponding
with the curved motion of the point of the pen or recording instrument.
The cylinder carrying the recording scale or chart may be caused to complete
a revolution within any desired period, the scale or chart being of course divided
to correspond, and the pen or recording instrument may be caused to be depressed
at every quarter of an hour, every half hour, or at any other determined periods.
The pen or recording instrument we employ may be formed as follows: A tube
fixed to the axis of the pinion is formed at its extremity with a cup for the ink,
a spring carries the tracing or dotting point, which passes through a hole in the
bottom of the ink cup; this tracing or dotting point is normally above the
surface of the chart or scale, but can be depressed by the hammer to produce
the record.
Instead of employing a paper chart or scale as above described, we may employ
cylinders of porcelain, enamel, or other material, printed or otherwise provided with
the scale or chart, upon which the record is made by effaceable dots.
Dated this 28th day of April 1891.
GEORGES MEYER.
ANTOINE REDIER.
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Recording Barometers.
We, GEORGES MEYER and ANTOINE REDIER both of 8 Cours des Petites
Ecuries, Paris, in the Republic of France, Clockmakers 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 stateinent :-
The difficulty of registering the movements of the barometer is consequent on
the weakness of the motive action of the barometer itself and our improvements
have for their object to provide a simple recording barometer whose recording pen
or instrument is uninfluenced by any friction against the recording surface
and whose record is consequently true with the rise and fall of the barometric
pressure.
In carrying our invention into effect we employ an ordinary barometric box
provided with a regulating button for adjusting it.
The plate upon which the regulating button acts has mounted thereon an axis
carrying a pallet lever which bears upon a pin or stud soldered upon the upper
plate of the barometric box. On the said pallet lever axis is fixed a segmental
toothed wheel or rack which gears with a pinion fixed on an axis carrying the hand
or recording instrument.
The pallet lever being put in motion by the changes of pressure acting thereon
through the barometric box carries with it the segmental rack or toothed wheel

page_text: which, gearing with the before mentioned pinion causes the hand or recording
instrument to move to the right or left.
In connection with the apparatus above described is a registering cylinder upon
which a sheet of paper is fixed or mounted in any convenient manner.
We preferably employ a sheet of paper printed with a scale or chart of length
equal to the circumference of the cylinder and arranged say for a week's record,
and we make the paper of greater length than that of the circumference of
the cylinder and cement the two extremities thereof together so as to form an
endless band.
The cylinder is supported only at one end and is free at the other, the endless
band of paper is passed over the free end of the cylinder and a small roller
is placed within it below the cylinder to give weight and stretch the paper,
thus in the rotation of the cylinder the paper is caused to turn in an endless
manner.
The following are the arrangements adopted to obtain the dotting on the chart
or scale by means of a clock movement.
The clock movement is enclosed within the cylinder carrying the recording chart
or scale and the cylinder turns around the axis of the clock movement.
The wheel work is an ordinary cylinder wheel work arranged so that at its
centre a solid axle can carry the cylinder which latter is preferably caused to make
one revolution in a week.
A cross bar or hammer carried by arms mounted on an axis of motion is employed
to depress at determined periods the hand or recording instrument; this hammer
has an arm attached thereto which bears upon a double snail wheel or cam which
makes one revolution per hour, per half hour or other determined period.
In the revolution of the snail wheel or cam the arm connected to the hammer
falls to the bottom of each part of the snail wheel or cam and by means of the
hammer depresses the pen or recording instrument and produces the dotting on the
chart or scale.
In order to avoid the retention of the pen or recording instrument in contact
with the chart or scale for any perceptible time the arm acting with the snail
wheel requires to be lifted immediately after its fall; this is effected in the following
manner.
One arm of a kind of detent or double armed lever pushed by a spring bears
against the opposite part of the snail wheel and escapes from it immediately after
the fall of the hammer and a second arm of this lever or detent instantaneously
raises the arm connected to the hammer and thereby raises the hammer out of
contact with the pen or recording instrument which latter instantly rises out of
contact with the chart or scale.
The chart or scale has the transverse lines printed in a curre corresponding
with the curved motion of the point of the pen or recording instrument.
The cylinder carrying the recording scale or chart may be caused to complete
a revolution within any desired period, the scale or chart being of course
divided to correspond, and the pen or recording instrument may be caused to be
depressed at every quarter of an hour, every half hour or at any other determined
periods.
The pen or recording instrument we employ may be formed as follows: A tube
fixed to the axis of the pinion is formed at its extremity with a cup for the
ink, a spring carries the tracing or dotting point which passes through a hole
in the bottom of the ink cup, this tracing or dotting point is normally above the
surface of the chart or scale but can be depressed by the hammer to produce the
record.
Instead of employing a paper chart or scale as above described, we may employ
cylinders of porcelain enamel or other material printed or otherwise provided with
the scale or chart upon which the record is made by effaceable dots.
And in order that our said invention may be more clearly understood and readily

page_text: DESCRIPTION OF THE DRAWINGS.
Figure 1 is a front elevation and Figure 2 is a side elevation of a recording
barometer constructed according to our invention.
Figure 3. is a plan of parts giving lateral motion to the pen or recording
instrument.
Figures 4 and 5 are side views of parts illustrating the mode of operating the
pen in the act of recording and
Figure 6. is a plan of a portion of the paper chart used in connection with the
instrument.
Figure 7 is a front elevation and Figure 8 is a side elevation representing a
modification in the pen or recording instrument and the means for depressing and
quickly raising it from the recording surface and
Figure 9 is a side view of said parts in different positions.
In all the figures like parts are indicated by similar letters of reference.
a is an ordinary barometric box which is provided with a regulating button a¹
for adjusting it as is well understood.
The plate upon which the regulating button a' acts has mounted thereon
in suitable bearings an axis e carrying a pallet lever c¹ which bears upon a pin or
stud a² soldered upon the upper plate of the barometric box a. On the said pallet
lever axis c is fixed a segmental toothed wheel or rack which gears with a
pinion d' fixed on an axis carrying the hand or recording instrument d.
The pallet lever c¹ being put in motion by the changes of pressure acting thereon
through the barometric box a carries with it the segmental rack or toothed wheel c³
which gearing with the pinion d' causes the hand or recording instrument d to
move to the right or left.
In connection with the apparatus above described is a registering cylinder e
upon which a sheet of paper is fixed or mounted in any convenient manner.
We preferably employ a sheet of paper printed with a scale or chart such as
that represented at Figure 6. of length equal to that of the circumference of the
cylinder e and arranged say for a week's record and we make the paper of some-
what greater length than that of the circumference of the cylinder leaving the
extremities blank and cement the two extremities thereof together so as to form an
endless band.
The transverse lines of the chart are curved as shown to the arc described by
the end of the hand or recording instrument d, they are numbered at intervals to
indicate the barometric pressure recorded by the hand d and they are separated
from each other in the chart shown to indicate intervals of two hours whilst at
one edge the days of the week and the hours of the day and night represented by
the transverse lines are printed.
The cylinder e is supported only at one end and is free at the other, the endless
band of paper is passed over the free end of the cylinder e and a small roller g
is placed within it below the cylinder to give weight and stretch the paper, this
roller g is preferably carried as shown by springs g' fixed to the board k carrying
the apparatus and provided with eyes g³ at their outer ends within which the necks
or trunnions * of the roller are placed, by which means the said roller can be
readily mounted and dismounted as required.
Thus in the rotation of the cylinder e the paper chart ƒ is caused to turn in an
endless manner without slip.
The following are the arrangements adopted to obtain the dotting on the chart
or scale by means of a clock movement.
The clock movement which may be of any suitable and convenient description is
carried by the plate i fixed to the standard * and at the centre of the clock move-

page_text: ment is a solid fixed axle i¹ on which the cylinder & is mounted and receives rotary
motion in the following manner.
Within the end plate el is fixed a plate 2 carrying a sleeve or tube and the
latter has within it a sleeve or hollow axle which is held therein with friction
sufficient to give motion to the cylinder e and such sleeve et has fixed to the outer
end thereof a toothed wheel which is driven by a pinion rotated by the
clock movement so as to cause the cylinder e to make one revolution in a week.
The cylinder e is held on the axle by a nut and washer but although the
cylinder can be driven by the pinion, it can for adjustment be readily rotated on
the axle free of the clock movement in consequence of its being connected with
the sleeve or hollow axis e by friction only.
The cylinder e may however if desired be
other period of time than one week.
caused to make a revolution within
A cross bar or hammer; carried by arms mounted on an axis of motion is
employed to depress at determined periods the hand or recording instrument d;.
this hammer has an arm pivotted thereto which bears upon a double suail wheel
or cam which makes one revolution within any convenient determined period,.
say within 40 minutes. In the revolution of the snail wheel or cam, the arm j
falls to the bottom of each part of the snail wheel or cam and by the fall of the
hammer j depresses the pen or recording instrument d and produces the dotting on
the chart or scale f.
In order to avoid the retention of the pen or recording instrument d in contact
with the chart or scale for any perceptible time the arrangement shown at
Figures 1 to 5 may be adopted, that is to say, the pen or recording instrument d
may consist of an inverted cone shaped ink vessel perforated at its apex and carried
at the outer end of a light spring and such pen d is normally in the position shown
in full lines at Figures 1. 2. 4. 5; the hammer j has on one of its armis j¹ a stud j'
which rests upon a spring adjustably attached to the arm; thus when the free
end of the arm falls from the top to the bottom of one of the arms of the snail
wheel or cam the sudden motion will allow the weight of the hammer j momentarily
to overcome the power of the spring and thereby cause the hammer to depress
the pen or recording instrument d to make a dot on the chart or scale, then
immediately the spring will again assert its power and will raise the hammer į
and the pen will consequent on the action of its spring again assume its normal
position free of the chart or scale then in the continued rotation of the snail
wheel or cam the arm will be gradually raised to the top of the part of said
cam when it will again fall and repeat the dotting as above described.
The various parts of the instrument are mounted on a board k which is preferably
provided with a loop by which the instruments can be suspended and a glazed
cover is also preferably hinged to the lower part of the board k and it is so
constructed as to completely enclose the instrument, hooks and eyes ³ or other
fastening means being provided at the upper part to enable the cover to be readily
fixed and released when required.
At Figures 7. 8. 9 we have represented the arrangement of parts described in
our Provisional Specification for causing the dotting on the chart or scale and the
instant removal of the pen or recording instrument therefrom. In this case the
hammer j and the arm are rigidly fixed together, the arm being adjustably
fixed to a stud projecting from one of the arms j'; a double armed lever lis
mounted on an axis on the plate i; the lower arm of this lever has a pin
which is pressed upwards against the underside of the snail wheel or cam by a
spring and the upper arm of said lever is capable of lifting the lever when
permitted by acting against a stud projecting from the free end of said lever j³.
The pen or recording instrument d in this case consists of a tube at the outer end
of which is a perforated cup for containing ink and a spring pin d which passes
through the perforation in the cup and is capable of being depressed to produce a
dot on the chart or scale.
Thus when in the rotation of the cam or snail wheel the stud of the lever j³.

page_text: suddenly falls off the top of one portion of said snail wheel to the bottom thereof
as indicated by dotted lines in Figure 9, the hammer j is caused to strike the
spring pin d and thereby depress it sufficiently to cause it to produce a dot on the
chart or scale, then immediately afterwards the lower arm of the lever will
escape from the nose of the other portion of the snail wheel and the spring * will
then force the lever upwards when the upper arm thereof will instantly raise
the arm and hammer ; to the position shown by the full lines in Figures 7. 8. 9
and thus enable the spring dotting pin d' to recover its normal position.
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 what
we claim is :-
:-
1. In recording barometers the peculiar combinations and arrangements of parts
whereby the pen or recording instrument which is normally free from the chart or
scale is at stated intervals caused to make a dot on the said chart or scale and
instantly to rise free thereof substantially as herein shown and described.
2. In recording barometers the combination of an ordinary barometric box and
gearing to give motion to a pen or recording instrument, a chart or scale mounted
printed or otherwise indicated on a drum revolved by clock work, and means
operated by such clock work to cause the pen or recording instrument which is
normally free from the chart or scale to make a dot at determined intervals
thereon and then instantly to rise free thereof substantially as herein shown and
described.
T
GEORGES MEYER.
ANTOINE REDIER.
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.