IMPROVEMENTS IN GLASS LAMP CHIMNEYS
Year: 1884

page_text: "
I PAUL AMBROSE BAYLE of 37 Rue de Naple Paris Engineer do hereby
declare the nature of my invention for "IMPROVEMENTS IN GLASS LAMP CHIMNEYS
to be as follows:-
.
This invention has for its object to provide a glass lamp chimney by the use of
which the combustion and light in every kind of lamp-for gas or for vegetable or
mineral oil will be increased.
In the specification of a former Patent granted to me on the 23rd April 1883
No 2050 I described a glass lamp chimney the construction of which was based
upon the peculiar properties of the conical convergent divergent ajutage in the
outflow of liquids and gases.
The conical convergent divergent glass lamp chimney consists of two truncated
cones meeting at their smaller bases-Since filing the specification above mentioned
I have found that in place of making the convergent cone at an angle of about 20°
as recommended in that specification better results can be obtained by making the
convergent cone at an angle of about 45° this being the angle at which I find that
in many cases the maximum effect is obtained.
This convergent cone rests as described in the specification above mentioned on
a cylinder of same diameter as its larger base and varying in length according to
circumstances, this cylinder being added to enable the glass chimney to be fixed on
the lamp.
The divergent cone narrows at an angle varying from 2° to 10° the maximuin
effect being obtained at about 5º.
The diameter of the two cones at their junction should be about one half of that
of the large end of the convergent cone but the lamp at present used by the public
not being constructed in accordance with the theory, the diameter at the point of
junction may vary up to 70% of the diameter of the large end of the convergent
cone.
1.
In place of continuing the divergent cone shape as above explained up to the
top of the glass chimney it may as described in the above mentioned specification
finish in a cylinder.
<>
In place also of making the divergent cone to rest upon a convergent cone I in
some cases make it to rest upon a spheroidal or ellipsoidal base presenting the
same inclinatlon as the angle of the convergent cone.
CARPMAEL & Co.,
Agents for the Applicant.

page_text: I, PAUL AMBROSE BAYLE of 37 Rue de Naples Paris Engineer do hereby
declare the nature of my invention for "IMPROVEMENTS IN GLASS LAMP CHIMNEYS
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
This Invention has for its object to to provide a glass lamp chimney by the use of
which the combustion and light in every kind of lamp for gas or for vegetable or
mineral oil will be increased.
In the specification of a former Patent granted to me on the 23rd April 1883
No 2050 I described a glass lamp chimney the construction of which was based
upon the peculiar properties of the conical convergent divergent ajutage in the
outflow of liquids and gases.
The conical convergent divergent glass lamp chimney consists of two truncated
cones meeting at their smaller bases-since filing the specification above mentioned
I have found that in place of making the convergent cone at an angle of about 20°
as recommended in that specification, for obtaining the maximum effect, better
results can be obtained by increasing the angle of the convergent cone preferably to
an angle of about 45° as shown at Figure 1 of the Drawings hereunto annexed,
this being the angle at which I find that in many cases the maximum effect is
obtained.
This convergent cone rests as described in the specification above mentioned on
-a-cylinder-of-same-diameter_as_its_larger_base_and_varying in length according to
circumstances; (see Figures 1 and 2).
The divergent cone narrows at an angle varying from 2° to 10° the maximum
effect being obtained at about 5°.
The diameter of the two cones at their junction should be about one half of that
of the large end of the convergent cone but the lamp at present used by the public
not being constructed in accordance with the theory the diameter at the point of
junction may vary up to 70% and more, of the diameter of the large end of the
convergent cone (see Figure 2).
In place of continuing the divergent cone shape as above explained up to the top
of the glass chimney it may as described in the above mentioned specification
finish in a cylinder as shown at Figure 3.
In place also of making the divergent cone to rest upon a convergent cone I in
some cases make it to rest upon a spheroidal base as illustrated at Figure 5 or an
ellipsoidal base as illustrated at Figure 4 presenting the same inclination as the
angles of the convergent cone.
-
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is
1. My improved glass lamp chimney which differs from the glass lamp chimney
described in the specification of my former Patent herein before mentioned in that

page_text: the angle of the converging cone for the maximum effect is increased and ranges up
to an angle of about 45 degrees.
2. A glass lamp chimney formed with a divergent cone resting on a spheroidal
base substantially as described and illustrated at Figure 5.
3. A glass lamp chiinney formed with a divergent cone resting on an ellipsoidal
base substantially as described and illustrated at Figure 4.
Dated this 14th day of March 1885
CARPMAEL & Co.,
Agents for the Applicant.