Improvements in Electrical Apparatus for Soldering, Bolling, and Heating.
Year: 1891

page_text: Date of Application, 9th Apr., 1891-Accepted, 9th May, 1891
COMI LEIN SPECIFICATION.
Improvements in Electrical Apparatus for Soldering, Bolling,
and Heating.
I, JOHANN JAKOB RITTER, of Basle, in the Republic of Switzerland, 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:-
My invention relates to electrical apparatus for soldering, boiling and heating.
It has a solenoid, the movable conical iron core of which is connected with a
brass tube which ends in front in several springs, and also carries two clamping
jaws of porcelain, against which a rod of carbon, fed through the tube by the
pressure of a spring, has its point pressed.
On the bobbin of the above mentioned solenoid is firmly screwed, in an insulated
state, an iron cylinder, which carries on its front end a V-shaped stirrup. Into this
stirrup is let in one end of the soldering iron or heating body, which is provided
with a slot into which is inserted a metallic rod, and the whole can be clamped
tight by means of screws.
One end of the wire of the solenoid is connected with one pole of a source of
electricity while the other end is connected with the metallic rod, from which a
continuous spark can pass to the carbon, which, on the other hand, is connected
with the other pole of the source of electricity.
The construction and method of action of this electrical apparatus are more
particularly shewn in the accompanying drawing, in which :-
Figure 1 is a longitudinal section; and,
Figure 2 is an elevation of the apparatus:
Figures 3, 4, 5 and 6 are transverse sections on the lines W W, X X, Y Y and
ZZ of Figure 1:
Figure 7 shews a longitudinal section of the front part of the apparatus as
arranged for boiling; and,
Figure 8 is a transverse section of the same:
Figure 9 shews a longitudinal section of the apparatus for heating.
The metal bobbin A. is provided with a wire coil B, which is surrounded by n
wooden casing C which serves as a handle for the apparatus. On the front end of
the bobbin A, a metallic disc D is secured by means of three lugs a, and on the
disc is screwed an insulating piece E of slate, porcelain, or the like. To the
insulating piece E is screwed a metallic collar to which the perforated casing F
is secured. In the unperforated portion is inserted, by means of screws g², a
socket G, V-shaped, and provided with external projections, and into the upcurved
edges of the socket is thrust the copper soldering bit H. At the end which is
inserted in the socket G this soldering bit is provided with a slot g' for the reception
of a metal rod 1, which is clamped into the slot g' by means of the screw j. Both
the rod I and the soldering bit H are secured by means of the screw j, in the
holder G, and by the holes in the latter the two former pieces can be adjusted or
separated. The electrical connection of the rod I with the front end of the wire
coils is accomplished by means of the binding screw y', the metal disc F1, the iron
casing, the screws j and g² and the socket G. The iron core K situated inside
the bobbin A is conically tapered from the front towards the back, and is traversed
ongitudinally by and firmly connected to the concentric tube L which is intended
o receive the carbon rod M. The tube L is provided at its rear end with a male
hread, on to which is screwed a cap 1 for closing it.
Two studs e attached to the core K bear against the sides of a rib e¹ fixed to the
obbin A, and prevent the core K, and also the tube L, from rotating when the

page_text: closing cap is screwed up or loosened. The fore part of the tube L ends in a number
of strips which, at their outer ends, press like springs against the periphery of the
carbon rod M, and bring about good contact. A coiled spring m presses the
carbon rod constantly forward, so that its conical point always projects between
the two porcelain clamping jaws m¹ which serve as a rod holder. These clamping
jaws m¹, which may be composed of any fire resisting material, are united to the
tube L by means of a metal mounting m³, and a slate disc m³. A coiled spring n,
which is secured on the one hand to the tube L by means of a ring, and on the
other to a projection n' of the bobbin A, constantly presses the core K forward out
of the corresponding cavity of the bobbin A, and at the same time presses the
point of the carbon rod M towards the point of the metallic rod 1. Movable
rollers d are attached to the disc D, and these facilitate the movements of the core,
and at the same time serve as conductors, similar rollers d' are also arranged in the
bobbin casing A for the same purpose. Moreover, one wire of the conductor N, which
enters through an opening at the rear end of the handle C, from the source of
electricity is, by means of this roller d', in connection with the tube I and the
carbon rod at the same time, inasmuch as the end of the above named wire is
connected with the, projection n¹ of the bobbin A by means of the screw z, whilst
the other wire of the conductor N is connected at 2¹ with the other end of the wire
coil of the bobbin.
The conductor-wire which is in connection with the carbon rod M is united to
the positive pole of the source of electricity, whilst the other wire, that is, the wire
which corresponds to the metal rod I is connected to the negative pole of the same
source of electricity. The handle C may be closed behind by a removable cap a.
In order to employ an apparatus of this description for soldering, the two wires
of the conductor N are connected with the poles of a source of electricity. As
soon as the electric current from the latter circulates through the apparatus, the
core K is drawn into the bobbin A, the carbon rod M is in consequence separated
from the metal rod I, and an electric spark or arc is set up between the points of
these bodies, by means of which the soldering bit H, in the vicinity, becomes heated
and can be used for soldering.
If the apparatus is to be used for boiling purposes, the soldering bit H is removed
and there is substituted for it the flat disc O, shewn in Figures 7 and 8. Any
desired cooking vessel is then placed upon the disc O.
On the other hand, in order to be able to use the apparatus for heating, the
heating-plate T, of a parabolic or any other desired form, is attached to the
apparatus in a similar manner. In Figure 9 the parabolic plate T is shewn provided
with points for the purpose of increasing the heating surface.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. An electrical apparatus, which can be employed for soldering, boiling, or
heating, consisting essentially of a solenoid B, by the conical movable iron core of
which a carbon rod M is carried, which rod is passed between two groups of
rollers d, d, and is connected by these rollers to the circuit of the positive pole
of a source of electricity; of a copper soldering bit, which is movably attached to
the metallic rod I placed opposite to the carbon rod M at the fore part of the
apparatus, and is connected to the circuit of the negative pole of a source of
electricity by a metallic casing F, as well as by the solenoid B; and of a coiled
spring M, which, when the apparatus is not in use, presses the carbon rod M against
the metallic rod I but, when the apparatus is in use, allows the solenoid to separate
the carbon rod together with the core K from the metal rod, so that an electric
spark or arc is set up between the rods M and I, whereby the soldering bit or disc
or heating plate becomes heated substantially as set forth.
2. In apparatus of the kind referred to in the preceding claiming clause-
(a.) The arrangement in the interior of the iron core K, of the tube L which

page_text: receives the carbon rod, the point of which is, by means of the coil-spring m,
constantly made to project between two clamping jaws of refractory material,
secured to the tube L by a metal socket m' and an insulating disc m³.
(.) The coil-spring n, secured on one side to the projection of the bobbin A,
and on the other side to the ring n° of the tube L and serving to press the
tube Land in consequence the iron core connected to it out of the bobbin,
when the apparatus is not in use, so that the carbon point then lies constantly
in contact with the point of the metallic rod I.
(c.) The arrangement of the groups of rollers d and d', which serve as guides
to the iron core K, and for connecting the carbon rod with the one pole of a
source of electricity.
d.) The V-shaped socket G, into the upcurved edges of which the soldering
bit provided with a slot is thrust, and in which. this soldering bit, as well as
the metal rod I is firmly held by screws, so that a shifting of the metal rod
can be effected, and the soldering bit can be removed and replaced by
another at will.
Dated the 9th day of April 1891
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.