Improvements in Incandescent Electric Lamps.
Year: 1898

page_text: Date of Application, 31st Dec., 1898
Complete Specification Left, 28th Oct., 1899-Accepted, 18th Dec., 1899
PROVISIONAL SPECIFICATION.
Improvements in Incandescent Electric Lamps.
ROMEO BOTTELLI, Architect, 11, Via Cusani, Milan, in the Kingdom of Italy,
do hereby declare the nature of this invention to be as follows:-
-
The globe of the incandescent lamp 18 furnished with more than one filament
of different power, and in such a way or arrangement that through the different
combinations in which the threads can be connected in "multiple arc," each
other, anyone can obtain by a single lamp different intensity of light & can
in consequence regulate the same, so that for instance should the lamp be
furnished with the three filaments a, b, c, seven degree of light or combination
of degree of light can be obtained, according to that, the thread a, 18 used alone
or the thead b, or c, alone, or the same in combination two by two, ab, ac, be,
or all together, abc.
Fig. 1 to 5 show one of said electrical incandescent lamp, with only two
luminous filaments, and in connection with an electic installation, which lamp
can be regulated into three different intensities of light, through the necessary
device shown also by the same Figure 1 and only those parts are alluded to which
actually are elements of the invention, or else are essential to its operation
Fig. 1 is a section along the line A B, Fig 2 another section along the line
CD, (respectively with the under traced plan) of a completely equipped and
mounted lamp.
The two filaments a and b meet by their respective supports in a single
thread c (on one side) which goes down through the insulating stratum g, and
make pole with the contact in m.
The other two ends of the filaments a and b join with the two springs ff
also fixed to the insulating stratum g
A small shaft o moved by a small arm and in corporated with a metallic
sector d, furnished with two insulating pushers e e', can turn at 90°, and functu-
nate reciprocally or simultaneously the spings ff, making the second pole
on the outside of the 11ng n, of any system, and consequently establishing the
communication with the other pole of the cuirent.
Fig. 3 shows that when the sector d 18 tuined in the position E, F, the
pushers e drives back the spring f and does not allow the current to go through
the same, while the sping remains into contact with the sector d.
The current then acts only through the filament a leaving out the filament b.
If the sector d takes the position G, H, (Fig. 4) it will be the pusher e¹ that
will push back the spring f while the spring f will come into contact with the
sector d, the a will this time be the cut out thread, and the current goes
hough b
Finally if the sector d 18 caused by a further tun of the arm p to take the
lace L, M, (Fig 5) both the springs ff will come in contact with the sector d
nd consequently the current goes in derivation through both the filaments a
nd and the light produced by the lamp shall be equal to the amount of the
ower, of the two filaments together a and b.

page_text: The arm 2 18 pivoted to the shaft o at such a distance from the metallic cover
to allow a fice work both downward the socket, or upward the globe of the lamp
according with the shape of the lamp-holder of its "tulipe" or according with
the different applications or mountings.
The attachment of the device to the glass globe is made by soldering the
upper ring of the covering to another ferrule fixed to the same globe in such
a way that the device might be easily detached & used for a new lamp, when
the one which is presently connected should have become no more good, iendeiing
by such a way useful again the value of the device.
This lamp so made is offering many advantages. Before all evidently, that
the light can be easily regulated at will. This was a want studied until now,
and not before now practically resolved, and by this new lamp the point 18
reached without any waste of the current by any resistance or anything else
intei posed in the oircuit.
Next that the lamp lasts longer than the usual one for in itself the filaments
are auxiliary each other and the amount of theu average durability is always
superior to that of any other filament lamp
In the case of the lamp with two filaments the most practical one-that
18 hereby described, the average life of the lamp 18 of one and a half the time
that an ordinary one filament incandescent lamp will last
Another important advantage, 18 that it saves money inasmuch the quantity
of current spent 18 always directly proportionate to the intensity of the light
needed, that is to say pioportionate to the luminous intensity of the filament
or of the combinations of the filaments that we put in action
The advantage also that the mechanical device of the lamp can as said
before be reused for a new lamp, when that in course becomes exhausted.
Figs 6 and 7 show the necessary arrangements when it would be required
to place the mechanical device at a certain distance from the other part of the
lamp. The thread c resulting from the junction of the two threads a and b 18
connected to the covering cl which by its lower rim makes a sure contact with
the plane of the lamp-holder, which push it by a spring The other two
terminals of the threads ab go down to the respective projecting contacts a "b"
We have then three contacts in the socket, from which a three-thieaded tress
abo starts to reach a contact-breaker and deviator z of any shape and make
to a given distance, after having taken connection with the source of the electric
current by the thread c¹
CLAIMS
1º A new incandescent electic-lamp, that can be regulated at will in different
intensities of light characterised by the fact that several different filaments
arranged in derivation into the same globe can be ignited by the current at
the same time or alternately in all possible combinations
2º A construction of the same lamp claimed at No. 1 characterised by the
fact that the necessary arrangement or device of the commutation for inserting
or cutting off the different filaments as above said 18 inserted in the body of the
lamp itself.
Dated this 30th day of December 1899

page_text: what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
-
"
with
The globe of the incandescent lamp is furnished with more than one filament
of different powers, and in such a way or arrangement that through the different
combinations in which the filaments can be connected in "multiple arc
each other, anyone can obtain by a single lamp different intensity of light and
can in consequence regulate the same, so that, for instance, should the lamp
be furnished with three filaments a, b, c, seven degrees of light can be obtained
according to that the filament a 18 used alone, or the filament b or c alone, or
the same in combination, two by two, ab, ac, be or all together abc.
Referring to the drawing furnished with my Provisional Specification.
Fig. 1 to 5 show one of said electrical incandescent lamp with only two
luminous flaments and in connection with an electric installation, which lamp
can be regulated into three different intensities of light, through the necessary
device shown also by the same Fig. 1; and only those parts are alluded to which
actually are elements of the invention or else are essential to its operation.
Fig. 118 a section along the line A B. Fig. 2 another section along the
line CD (iespectively with the under traced plan) of a completely equipped
and mounted lamp.
The two filaments a and b meet, by their respective supports, in a single
wire c (on one side) which goes down through the insulating stratum g, and
make terminal with the contact in m
The other two ends of the filaments a and b join with the two springs f fl
also fixed to the insulating stratum 9.
A small shaft o moved by a small aim p and incorporated with a metallic
sector d furnished with two insulating pushers e el can turn up to 90 degrees
and act recipiocally or simultaneously, the springs f f making the second
terminal on the outside of the ring n of any system, and consequently establishing
the communication with the other pole of the current
Fig 3 shows that when the sector d is turned in the position E F the pusher e
dives back the sping f and do not allow the current to go through the same,
while the spring f¹ remains into contact with the sector d.
The current then acts only through the filament a leaving out the filament b
If the sector d take the position GH, (Fig. 4) it will be the pusher e¹ that
will push back the spring f, while the spring f will come into contact with
the sector d, the a will this time be cut out and the current goes through b.
Finally if the said sector d 18 caused by a further turn of the arm to take the
place L M (Fig 5) both the springs ff will come into contact with the sector d
and consequently the current goes in parallel through both the filaments a and b,
and the light pioduced by the lamp will be equal to the amount of the power
of the two filaments together a and b
The aim is pivoted to the shaft o at such a distance from the metallic cover,
to allow a free work both downwards the socket, or upwards the globe of the
lamp, according to the shape of the lamp holder, of the tulip (glass shade), or
according to the different applications or mountings
The attachment of the device to the glass globe is made by soldering the
upper ring of the covering to another ferrule fixed to the same globe in such
a way that the device can be easily detached and used for a new lamp, when
the one to which is presently connected is no more good, rendering by such a
way the device useful again.
This lamp, so made, offers many advantages Before all, evidently, the light
can be easily regulated at will.
This was a want studied until now, but not before practically resolved By
this new lamp the point is reached without any waste of current by any resistance
or anything else interposed in the circuit.
Next that the lamp lasts longer than the usual one, for the filaments are

page_text: auxiliary each other and the amount of their average durability is always
superior to that of an one filament lamp.
In the case of the lamp with two filaments (the more practical one) that is
hereby described, the average life of the lamp 18 of one and half the time that an
ordinary one filament incandescent lamp will last.
Another important advantage 18 that it saves money, inasmuch the quantity
of current spent is always directly proportionate to the intensity of the light
needed, that is to say proportionate to the luminous intensity of the filament,
or of the combinations of the filaments that we put into action.
The advantage also, that the mechanical device of the lamp can, as said before,
be re-used for a new lamp when that in service becomes exhausted
Fig. 6 and 7 show the necessary arrangement when it would be required to
place the mechanical device at a certain distance from the other part of the lamp
The wne c, resulting from the junction of the two filaments a and b, is con-
nected to the covering cl which by its lower 11m makes a sure contact with
the plane of the lamp holder, which pushes it by a spring The other two
terminals of the filaments a b go down to the respective projecting contacts a
which enter within two springs all bl
We have then three contacts in the
socket, from which a three wire tiess a b c 11ses to reach a contact breaker,
after having taken connection with the source of the electric current by the
wile c¹.
CLAIMS.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same 18 to be performed, I declare that what
I claim 18
1. A new incandescent lamp that can be regulated at will in different intensi-
ties of light, characterised by the fact that several different filaments arranged
in parallel into the same globe can be ignited by the current at the same time
or alternatively in all possible combinations.
2. A construction of the same lamp claimed at No 1, characterised by the
fact that the necessary arrangement or device of the commutation for inserting
or cutting off the different filaments above said, is inserted in the body of the
lamp itself.