Improvements in Electro Magnets.
Year: 1896

page_text: Date of Application, 1st Sept., 1896-Accepted, 26th Sept., 1896
Improvements in Electro Magnets.
I, THEODORE MCKENNA of 17 & 18 Basinghall Street London, Solicitor and
Patent Agent, 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 :-
The accompanying drawings illustrate the invention, of which
Figure 1, shows a plan view of the magnet, connected with a switch.
Figure 2, a longitudinal section of the same.
Figure 3, a top view of the magnet with the armature removed.
Figures 4 and 5 show the magnet with modifications of the guiding devices for
the armature.
Figure 6 shows a modified form of the device.
Viewing Figure 1, the magnet is shown at A connected by one of its armatures
by a pivoted lever a' whose outer end is connected with the switch piece a', which
in turn is connected by intermediate mechanism with its companion switch piece a³,
and both work together. As this switch movement is a common device it need not
be further described.
The construction of the magnet is shown in Figuro 2, in which A represents an
outer shell or casing, and is shown in the drawing as circular in form. Within
this casing is fitted a core B having approximately the same length longitudinally
as the outer shell, but of smaller diameter than the shell and is provided with the
shoulders b'. These shoulders are constructed to fit neatly within the outer
shell A. Between the shoulders and the ends of the shell aud core the magnet is
provided with the wire windings or coils C and C. For convenience the terminals
of each of these windings protrude through the shell as shown at b³, b³, one of
Baid terminals proceeds to post I and the other to post 2. The other ends of the
coils are grounded in the core. A battery or other generator L-B connects from
one side with the arm cand from the other side with the core B of the magnet.
The arm may be shifted to and from the posts 1 and 2, and when so shifted
transfers the attraction of the magnet to oue or the other of its ends. This
magnet is provided with the armatures D and D', which are connected together
and suitably guided. There are a number of ways in which the gniding may be
dune. As shown in Figure 2 the core B is perforated longitudinally and provided
with a rod d to slide in the perforation, and to the end of this rod the armatures
are attached.
Figure 3 is a top view of the magnet with the armaturo removed.
A modified forin of these guiding devices is shown in Figures 4 and 5, wherein
the shell A is provided with perforated luge, through which the rods, which
join the armatures together, pass. This magnet may be connected up with any
mechanism for performing work as illustrated in the drawings, and constitutes a
magnet of great power and prompt action.
Another modified form is shown in Figure 6, wherein the armatures are hung
to a forked pivoted lever.
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 electro magnet, an outer casing, a core enclosed within said casing, both
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page_text: of magnetizable material, two coils wound between them, one at each end and
separated from each other, thereby forming a double magnet, one at each end, in
combination with a movable plate armature at each end of said core and casing
and constructed to register with and cover both coro and casing.
2. In an electro magnet an outer casing, a core enclosed within said casing, both
of magnetizable material, two coils wound between them, one at each end and
separated from each other, thereby forming a double magnet, one at each end, in
combination with a movable plate armature at each end of said core and casing
and constructed to register with and cover both, and means for directing an electric
current through either of said coils and thereby magnetizing the poles of either of
the magnets and attract its respective armature thereto.
3. In an electro magnet, an outer shell or casing provided with an enclosed core
having the shoulder b', and a coil at each end beyond the shoulder, occupying the
space between the core aud casing, in combination with terminal connections from
each of the coils with one side of a generator, and a terminal connection from the
core to the other side of the generator.
4. In an electro magnet, an outer casing, a longitudinally perforated core
enclosed within said casing, both of inagnetizable material, and both flush with
each other at their pole ends, two coils wound between them one at each end and
separated from each other, thereby forming two magnets, in combination with a
rud passing through the perforation in the core and attached at each end to a plate
armature covering the casing and registering with both casing and core.
5. In an electro magnet, au outer casing, a longitudinally perforated core
cnclosed within said casing, both of magnetizable material and Hush with each
other at their pole ends, two coils wound between them, one at each end and
separated from each other, thereby forming two magnets one at each end, in
combination with a rod passing through the perforation in the core and attached
at each end to a plate armature covering the casing and registering with both
casing and core, and means for controlling the current through either of the coils
and thereby producing alternate movements of the armatures.
6. In an electromagnet, an outer casing, a core enclosed within said casing,
both of magnetizable material, a shoulder between the two constructed to leave
spaces between said core and casing at each end, separated by the shoulder, a coil
occupying each of the spaces thereby forming two magnets one at each end, in
combination with two movable plate armatures one at each end, and constructed to
register with and cover both core aud casing.
7. In an electro magnet, an outer casing, a longitudinally perforated core
enclosed within the casing both of magnetizable material, a shoulder between the
two, constructed to leave spaces between said core and casing at each end, separated
by the shoulder, a coil occupying each of the spaces, thereby forming two magnets
one at each end, in combination with a rod passing through the perforation in the
core, attached at each end to a plato armature constructed to register with and
cover both core and casing.
8. In an electro magnet, an outer casing, a core enclosed within the casing both
of magnetizable material, a shoulder between the two constructed to leave spaces
between suid core and casing, one at each end, separated by the shoulder, a coil
occupying each of the spaces thereby forming two magnets, one at each end, in
combination with a plate armature for each of the magnets, and guiding devices
for the arinatures whereby the same are directed to register with and cover both
casing and core.
Dated the lat day of Santamben 1900
THEO. M° KENNA,
Applicant.