Year: 1886

page_text: Date of Application, 3rd May, 1886.
Complete Left, 14th Jan., 1887.
Complete Accepted, 18th Feb., 1887.
I BENJAMIN JOSEPH BARNARD MILLS of the firm of Harris & Mills of 23
Southampton Buildings in the County of Middlesex, Patent Agent do hereby declare
the nature of this invention to be as follows:-
This invention relates to incandescent electric lamps designed to be used in series
with one another with currents of high electro-motive force, and in which the leading
in wires are brought into close proximity within the stem of the lamp so that when
the carbon filament of the lamp breaks and an are forms across it and continues down
the wires into the stem, it will be stopped by the fusing or soldering of the wires
together at the point where they are thus placed in proximity; and said invention
relates more particularly to simple and effective means for holding the wires in
proximity as aforesaid.
For this purpose the inventor employs a double barrelled glass tube, that is a
tube having two perforations through which the two bare leading in wires are
passed.
They are thus separated or insulated from each other within the tube by a thin
partition of glass, but are in the desired soldering proximity just above the top of the
tube, from which point they are bent out to the place where they are sealed in the
glass of the stem.
Below the tube also they are bent away from each other to be connected with the
terminals on the base of the lamp.
The double barrelled glass tube may be long enough to extend down into the
plaster or other insulating material of which the base is composed or it may be a

page_text: short tube wholly within the neck and supported by the spread of the wires above and
below it.
In this case it is preferred to place an insulating covering upon one or both of the
wires to prevent an arc from ever springing across at this point.
Instead of the double barrelled glass tube two small tubes may be used secured
together by any suitable wrapping or binding.
The operation will be readily understood. When the carbon filament breaks and an
are forms across the filament it continues down the leading in wires fusing and
destroying the same until it reaches the point where they are close enough together
for the melted metal to pass across from one to the other when the wires will be at
once fused or soldered together, and they being thus connected the are must at once
cease.
I do not claim placing the wires in soldering proximity within the stem, separately
considered as I believe this feature to be the invention of another, namely, Edward H.
Johnson, of the City of New York.
B. J. B. MILLS.
By Harris & Mills.
23, Southampton Buildings,
Agents.

page_text: Improvements in Incandescent Electric Lamps.
I BENJAMIN JOSEPH BARNARD MILLS of the firm of Harris and Mills of 23
Southampton Buildings in the County of Middlesex, Patent Agent do hereby declare
the nature of this invention, a communication to me from abroad by William Holzer,
of the Town of Harrison, in the County of Hudson, and the State of New Jersey,
United States of America, (+lass Blower, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:
This invention relates to incandescent electric lamps designed to be used in series
with one another with currents of high electro-motive force, and in which the leading
in wires are brought into close proximity within the stem of the lamp so that when
the carbon filament of the lamp breaks and an are forms across it and continues down
to the wires into the stem it will be stopped by the fusing or soldering of the wires
together at the point where they are thus placed in proximity; and said invention
relates more particularly to simple and effective means for holding the wires in
proximity as aforesaid.
For this purpose the inventor employs a double-barrelled glass tube-that is a
tube having two perforations through which the two bare leading in wires are
passed.
They are thus separated or insulated from each other within the tube by a thin
partition of glass, but are in the desired soldering proximity just above the top of
the tube, from which point they are bent out to the place where they are sealed in the
glass of the stem. Below the tube also they are bent away from each other to be
connected with the terminals on the base of the lamp.
The double-barrelled glass tube may be long enough to extend down into the
plaster or other insulating material of which the base is composed, or it may be a
short tube wholly within the neck and supported by the spread of the wires above and
below it.
In this case it is preferred to place an insulating covering upon one or both of the
wires to prevent an arc from ever springing across at this point.
Instead of the double-barrelled glass tube two small tubes may be used secured
together by any suitable wrapping or binding.
The operation will he readily understood. When the carbon filament breaks and an
are forms across the filament it continues down the leading in wires fusing and
destroying the same until it reaches the point where they are close enough together
for the melted metal to pass across from one to the other when the wires will be at
once fused or soldered together, and they being thus connected the arc must at once
cease.
The inventor does not claim placing the wires in soldering proximity within the
stem separately considered as he believes this feature to be the invention of another
namely Edward H. Johnson, of the City of New York.

page_text: And in order that the said Invention may be more clearly understood and readily
carried into effect, 1 will proceed aided by the accompanying drawings more fully to
describe the same.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a view in elevation of a lamp embodying said invention in one form
with the insulating base in section;
Figure 2 a view of the lower portion of the lamp without the insulating base and
showing a somewhat different form of the invention, after the are has been formed and
broken:
Figure 3 an enlarged vertical section, and Figure 4 an enlarged cross section of
the double barrelled tube; and Figure 5, a view still more enlarged, showing the use
of two tubes bound together.
A is the sealed glass globe, B the stem or wire support, the carbon filament
and D the insulating base of an incandescent electric lamp.
The leading in wires a a are sealed in the glass of the stem at and are connected
with the filament C, and with the terminals cd on the base.
E is the double-barrelled glass tube having two perforations ee through which the
leading in wires a pass, respectively.
In the form shown in Figure 1 the tube E extends down into the base D which
is usually made of plaster. In that seen in Figure 2 the tube E is a short one and is
supported upon the wires which are bent out above and below it and are separated by
a cork stopper F, inserted in the lower end of the stem.
The lamp thus arranged is provided with the insulating base and terminals as
before.
In this arrangement the lower portion of the wires may be covered with insulation
as above set forth.
In figure 5 two tubes are shown bound together by thread, cord or other
material which may be used as a substitute for the double barrelled tube before
described and is considered an equivalent therefor.
When the are reaches the end of the tube or nearly there the wires are soldered
together by a drop i of melted metal as already described.
Having now particularly described and ascertained the nature of said invention and
in what manner the same is to be performed 1 declare that what 1 claim is :-
In an incandescent electric lamp the use of a double-barrelled glass tube or two
single tubes secured together for bringing the leading in wires into soldering
proximity but insulating them from each other, substantially as herein before
described.