BELECE An Arc Lamp.
Year: 1891

page_text: Date of Application, 28th Sept., 1891-Accepted, 24th Dec., 1 91
WW BELECE
An Arc Lamp.
I, WILLIAM STAFFORD HAYS, a citizen of the United States, residing at Troy,
County of Miami and State of Ohio, 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 the mechanical construction of an electric arc lamp.
The invention is described accurately by reference to the accompanying drawings,
in which
Fig. 1, is an elevation of that part of the lamp to which the invention relates.
Fig. 2, is a vertical section of a portion of the lamp.
The device embodying my invention consists of the combination of a main
magnet a, of coarse wire, a shunt magnet b, of fine wire, both securely attached to
the upper plate, which is connected to the lower plate d, by posts e. Each
magnet as shown in Fig. 2, has a tubular non-magnetic axial projection f, in which
Loosely fits an axial cylindrical armature g, provided with a slotted extension / to
which is pivotted respectively the arms i, i, of the ring clutch j, through which
passes the carbon holder m. It will be noticed that the elements f, g, h, i, are in
duplicate, the same being provided respectively for the magnets a, b. The axes of
the magnets a, b, are parallel to and equally distant from that of the carbon rod
holder m.
The axes of the tubes and armatures y coincide respectively with
those of the magnets a, b. The tubular projection forms an extension to the
tube, surrounding the core n. To this core is secured a washer against which
presses the spool end p. The tube, presses against the opposite side of the spool
end or insulating disc p, whereby the latter is held in a fixed position at one end
of said core. The corresponding disc p' is held upon the tube by a ring g
soldered upon the same and pressing against the disc p'. Between the two discs is
located a winding of a magnet. An insulating plater, connects the discs p' which
belong respectively to the magnets a, b. The holder m passes through said plate
and also through the plates c and d and the high resistance coil which is wound
upon an insulating tube surrounding the holder m and fixed to the plate d.
Supported on plated is a contact , which is in circuit with the lamp terminal o
and in the path of the contact a', which is carried upon an insulating projection w,
extending from one of the slotted extensions h. When the lamp is ready for use,
the contacts u and touch each other as do also the insulating tube t and the
ring; while the cores are at the maximum distance from the armatures g.
With no current through the lamp or with carbous consumed, the circuit is from
the terminal through the resistance coils, contacts u, u', and terminal v. With
carbons in the lamp and with no current, the circuit is the same except that there
is also a path from the lamp terminal ', through the magnet a, the brush r, which
rests upon the holder m, through the carbons y and to the lamp terminal v. If
now the current passes through the lamp it "divides between the path of the
carbons and the coils, the two being branch circuits to each other. The magnet a,
being of low resistance and properly wound, the armature h, is attracted sufficiently
to interrupt the circuit at the contacts u, "'. Then all the current will pass
through the magnet a, raising its armature y, to the full height and by means of a
clutch separating the carbons and starting the arc. As the arc lengthens more
and more current passes through the shunt magnet b, attracting its armature g and
raising the other side of the clutch ; until the carbon rod is released, which falls
until the arc is the normal brilliancy, when the shunt magnet & weakens, allowing
its armature to drop thus locking the rod m until the process is repeated through
the formation of the lengthened arc.

page_text: Z is a contact located upon plater and electrically connected to post 1 by the
conductor ; therefore when the button A on top of the holder m touches the
terminal z (as it does when the carbons have been consumed) the coil a is short
circuited, its core demagnetized, and armature g released, contacts u, n' close the
circuit through the resistance coil s.
I find in practice that the lamp is free from the difficulty known as the "rod
sticking."
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. In an electric arc lamp, the combination of a carbon holder m; a friction
ring clutch j surrounding the same and having oppositely located arms i, i¹; main
and shunt magnets a, b, whose axes are parallel to and substantially equally distant
from that of the holder m; tubular axial extensions of non-magnetic material
projecting from said magnets and forming extensions to the tubes f¹ upon which
the magnet coils are wound, and within which are located the magnet cores n;
cylindrical armatures loosely and axially located in said tubes and having
slotted extensions 7, which are pivotted to the said arms, respectively; and an
insulating tube, surrounding the holder m and supporting the ring j.
2. In an electric arc lamp, the combination of a carbon holder m; a friction
clutch surrounding the same and having oppositely located arms i, '; main and
shunt magnets a, b, whose axes are parallel to and substantially equally distant
from that of the holder m; tubular axial extensions of non-magnetic material
projecting from said magnet and forming extensions to the tubes upon which the
magnet coils are wound, and within which are located the magnet cores n;
cylindrical armatures 9 loosely and axially located in said tubes and having
slotted extensions h, which are pivotted to the said arms, respectively; an
insulating tube t surrounding the holder, and surrounding the ring a resistance
coils mounted upon the insulating tube t, and in circuit with separable contacts u, u',
one of which is stationary, and the other carried by one of the extensions ; and
an insulating plater connecting the magnet a, b, and carrying an electric terminal z
connected with one of the terminals of the lamp, and carrying a brush x, which is
electrically connected with the carbon holder m, and with the coil of magnet a.
Dated this 22nd day of September 1891.
W. T. EMMOTT & Co.,
62, New Bridge Street, Manchester, Agents for the Applicant.