| No. 771,917. | Patented October 11, 1904. | |
UNITED STATES PATENT OFFICE. ROBERTO LANDELL DE MOURA, OF NEW YORK, N. Y. WAVE-TRANSMITTER. SPECIFICATION forming part of Letters Patent No. 771,917, dated October 11, 1904. Application filed February 9, 1903. Serial No. 142,440. (No model.) | ||
To all whom it may concern:
Be it known that I, Roberto Landell de
Moura, a citizen of the Republic of Brazil,
and a resident of the borough of Manhattan,
5city of New York, county and State of New
York, have invented a new Wave-Transmit-
ter, of which the following is a specification.
My invention relates to the transmission of
intelligence from one point to another 10with-
out the intermediation of wires, or, in brief,
to signaling through space.
It has for its object the production of im-
proved results with simplified apparatus, util-
izing certain principles of my own discovery.
15Heretofore when signals were to be trans-
mitted the transmission has been accom-
plished by means of manually-operated appa-
ratus. In some cases this has been replaced
by automatic mechanism; but the 20manage-
ment of such mechanism or the manipulation
of a key requires a certain amount of skill
and experience in the operator. According
to my invention, I primarily produce elec-
trical oscillations and flickerings of light by
25means of sonorous vibrations, which may be
those of the human voice or of other sounds.
I then employ these electrical or light oscil-
lations so produced for telegraphing or tele-
phoning through space. In such 30transmis-
sion, and particularly in telephoning, I may
use devices similar to those described in my
prior application, filed October 4, 1901, Se-
rial No. 77,676. In order to produce the two
kinds of oscillations mentioned, I have devised
35an arrangement of circuits and certain appa-
ratus which I denominate a phonetic inter-
rupter."
My phonetic interrupter consists, essen-
tially, of a pair of contacts responsive to the
40tones of the voice or to vibrations communi-
cated from any source controlling the pri-
mary circuit of a high-wound induction-coil
whose said primary is connected to the pri-
mary of a Ruhmkorff coil for transmitting.
45The sonorous vibrations at the interrupter are
transformed into electric or light waves,
which upon passing to the receiving-station
are there received and causal to affect suit-
able apparatus whereby they may render
themselves apparent through the medium of50
a telephone-receiver, a lamp, a Morse regis-
ter, or the like.
My invention is fully described in the fol-
lowing specification and illustrated in the ac-
companying drawings, in which--55
Figure 1 is a sectional view of my phonetic
interrupter with the parts shown in full. Fig.
2 is an adjusting-key for the core of the induc-
tion-coil. Figs. 3 and 4 are diagrams show-
ing the connections of the primary circuit of60
the interrupter. Fig. 5 is a diagram of the
transmitting - circuits, with the apparatus
shown in place. Fig. 6 is a similar diagram
showing the connections of the apparatus
more in detail.65
Referring to Fig. 1, A is a non-conducting
case or shell, and A¹ is a cap therefor. This
cap is formed so as to inclose a resonating--
chamber, at the bottom of which lies a perfo-
rated disk A², corresponding to the mouth-
piece70 of the ordinary telephone and fulfilling
the same function when the cap A¹ is removed.
Lying beneath the disk A² and supported by
the shell is a diaphragm u, having at its cen-
tral point a slight depression a¹.75
Arranged within the shell and supported
between suitable heads is an induction-coil D,
having the primary winding d and the sec-
ondary winding d¹ with a core of soft iron
d². This core is made hollow, and within it80
lies a central spindle B, supported at its up-
per end by the perforated end of the core and
at its lower end adjustably held therein by
means of the nut l, threaded into the lower
end of the core, and the guide b⁴. The spin-
dle85 has a head B¹, by which it may be ma-
nipulated, the function of the adjustment be-
ing to permit the air-gap between the tip of
the spindle at bx and the diaphragm a at a¹ to
be arranged so that the vibrations of articu-
late90 speech will cause a regular, rapid, and
continuous moving and breaking of the cir-
cuit. By means of the key K (shown in Fig.
2) the nut b may be screwed home when the
spindle is adjusted, the prongs k and K of the95
key Binding registering openings in the nut
at b³.
