Magneto-Electric Telegraphy. Page: 3 of 4
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UNITED STATES PATENT OFFICE,
FRED. IH. BROWN, OF FORT WORTH, TEXAS.
MAGNETO-ELECTRIC TELEGRAPHY.
SPECIFICATION forming part of Letters Patent No. 324,746, dated August 1!, 1835.
Application filed Mfarch 2, 1865. (No model.)To all zvhom, it 77tay Concer1s:
Be it known that I, FRED. H. BRowN, a citi-
zen of the United States, residing at Fort
Worth, in the county of Tarrant and State of
5 Texas, have invented a new and useful TIm-
provement in Magneto-Telegraphs, of which
the following is a specification, reference be-
ing had to the accompanying drawings.
My invention relates to an improvement in
to magneto-telegraphs; and it consists in the pe-
culiar construction and combination of devices
that will be more fully set forth hereinafter,
and particularly pointed out in the claims.
MIy invention has for its object the trans
15 mission of telegraphic or telephonic messages
between distant points by means of induced
currents produced by the use of permanent
magnets and without the use of a battery-cur-
rent.
20 The accompanying drawings represent in-
struments by means of which I am enabled to
carry my invention into effect.
Figure 1 is a side elevation of a sending-in-
strument. Fig. 2 is a vertical sectional view
25 of a receiving-instrument. Fig. 3 is a hori-
zontal sectional view of the same, taken on
the line x x of Fig. 2.
A represents the sending-instrument, which
is composed of a permanent U-shaped mag-
30 net, on the poles of which are wrapped the
helices of insulated wire B. A key, C, is piv-
oted to one pole of the magnet, and extends
over and beyond the opposite pole thereof,
and is provided at its outer extremity with a
35 button, D, similar to the telegraphic keys now
in common use. The pivotal end portion, C',
of the key is made of soft iron, and the ex-
tended arm portion C' thereof is made of brass.
E represents an adjusting -screw, which is
40 made of iron, and which passes down through
the key C, its low er end being normally nearly
in contact with the pole S of the magnet. The
adjusting-screw E is provided with a jam-nut,
C, as shliown.
45 F represents a brass screw that projects from
the upper side of the south pole of the helix.
On this screw is placed a thumb-nutf, which is
internally threaded to receive the screw, and
which is adapted to be adjusted up and down
50 upon the screw F. A coiled spring, f', bears
between the upper side of the nut f and thelower side of the key, and prevents the screw
E fiom coming normally in contact with the
south pole of the magnet. A curved arm, G, is
made of brass, and is secured to the upper 55
side of the south helix, and down through the
upper end of this arm is passed a regulating
or adjusting screw, g, which has a jam-nut, g',
and limits the upward movement of the key.
H represents a disk, which is preferably made 6o
of thin sheet-steel, and which is permanently
secured to the pivoted end of the key and ex-
tends horizontally over the poles of the mag-
net, as shown.
Z represents the receiving-instrument, of 65
which I represents an inclosing-case, which is
composed of wood or metal, and is provided
with a mouth-piece, K. To the lower side of
this case, on its inner side, is secured a perma-
nent U -shaped magnet, the south pole of which 70
is at one side of the inclosing-case, -while the
north pole is directly in line with the center of
the case and its mouth-piece. Oil the north
pole of the magnet is wound a helix, L, of fine
insulated wire, while the south pole is left bare. 75
The ends of helix L are secured to the bind-
ing-posts M, and the wires from the sending-
instrument are connected to said binding-
posts, as shown.
N represents a circular metallic band hav- 8o
ing projecting points n. This band is placed
in the inclosing case, in the upper side there-
of, at a suitable distance below the contracted
inner end of the nimouth-piece, and is secured
to said inclosing-case by ienans of screws, 85
which pass through openings in the outer ends
of the projecting points, and secure said points
in recesses that are made in the inclosing-case
to receive them, as is shown at Fig. 3. By
this construction an air-space is left between go
the band and the inclosing-case.
On the under side of the band N is secured
a disk, 0, which is preferably made of thin
sheet-steel, and which is acoustically insulated
from the band N by a piece of paper or other 95
suitable substance, P, that is interposed be-
tween the disk anditssupporting-band. The
south pole of the magnet is in contact with the
north pole or outer edge of the magnetized
disk, and the north pole of the magnet is di- (c
rectly under the center of the disk and out of
contact therewith.
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Reference the current page of this Patent.
Brown, Fred H. Magneto-Electric Telegraphy., patent, August 18, 1885; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth171062/m1/3/: accessed July 2, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.