| 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-Transmitter, of which the following is a specification.
My invention relates to the transmission of intelligence from one point to another 10without the intermediation of wires, or, in brief, to signaling through space.
It has for its object the production of improved results with simplified apparatus, utilizing certain principles of my own discovery.
15Heretofore when signals were to be transmitted the transmission has been accomplished by means of manually-operated apparatus. In some cases this has been replaced by automatic mechanism; but the 20management of such mechanism or the manipulation of a key requires a certain amount of skill and experience in the operator.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 electrical oscillations and flickerings of light by25means of sonorous vibrations, which may be those of the human voice or of other sounds. I then employ these electrical or light oscillations so produced for telegraphing or telephoning through space. In such 30transmission, and particularly in telephoning, I may use devices similar to those described in my prior application, filed October 4, 1901, Serial No. 77,676. In order to produce the two kinds of oscillations mentioned, I have devised35 an arrangement of circuits and certain apparatus which I denominate a phonetic interrupter."
My phonetic interrupter consists, essentially, of a pair of contacts responsive to the40tones of the voice or to vibrations communicated from any source controlling the primary circuit of a high-wound induction-coil whose said primary is connected to the primary of a Ruhmkorff coil for transmitting.45 The 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 suitable apparatus whereby they may render themselves apparent through the medium of 50a telephone-receiver, a lamp, a Morse register, or the like.
My invention is fully described in the following specification and illustrated in the accompanying 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 induction-coil. Figs. 3 and 4 are diagrams showing 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 perforated disk A², corresponding to the mouthpiece70 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 central 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 secondary 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 upper 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 spindle85 has a head B¹, by which it may be manipulated, the function of the adjustment being 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 articulate90 speech will cause a regular, rapid, and continuous moving and breaking of the circuit. 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 finding registering openings in the nut at b³.
Fitted to the apex of the cap A¹ is a flexible