US348430A - Telephone-transmitter - Google Patents
Telephone-transmitter Download PDFInfo
- Publication number
- US348430A US348430A US348430DA US348430A US 348430 A US348430 A US 348430A US 348430D A US348430D A US 348430DA US 348430 A US348430 A US 348430A
- Authority
- US
- United States
- Prior art keywords
- transmitter
- telephone
- case
- contact
- adjusting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 210000000188 Diaphragm Anatomy 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 230000001702 transmitter Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 210000003813 Thumb Anatomy 0.000 description 2
- 241000282485 Vulpes vulpes Species 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000011121 hardwood Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
- H04R1/083—Special constructions of mouthpieces
Definitions
- FIG. 1 is a side elevation of the transmitter.
- Fig. 2 is a longitudinal sectional view on an enlarged scale.
- Fig. 3 is a plan view of the receiving end with the diaphragm and cap removed.
- Fig. 4 is a broken section showing the operation of the adjusting-screw.
- Fig. 5 is a broken section showing the operation of the adjusting-screw.
- the object of my invention is to provide a telephonic transmitter having its vibratory contacts under the influence of a strong magnetic field, and red ace the liability of derangement from rough handling and consequent impairment of the utility of the instrument.
- A is a trumpet-shaped case, made of hard wood or any other desirable material, and hollowed out to receive an adjusting device and a vibratory contactpoint, as hereinafter set out.
- Inserted in the case at (L is one end of a short soft-iron tube, which may be made of a piece of gas-pipe seveu-eighths of an inch in diameter and five inches long.
- This soft-iron tube B forms the 40 core of an electro-magnct, completed by the helix 0, wound thereon, and proper electrical connections.
- a bearing for an adjusting thumb -screw, f while the opposite end is turned upward at right angles, as seen at g, and affords a bearing for one end of a highlyelastic steel spring, 71, which carries a carbon Firmly secured over the mouth of the case by means of screws 17 z is a dia phragm, made of ordinary sheet-tin, to the center of which is secured another contact-- point, E, the contacts E and E being in operative relation, and that relation susceptible of change by the changing of the position of the cross-bar D through the medium of the setscrew f.
- a cap, P Over the end of the casing is fitted a cap, P, provided with a central opening, through which the sound-waves may pass.
- the instrument is connected by means of binding-posts t t t" t, the connections at posts t if being for the primary or battery connections, the wire from t terminating in a contact against the diaphragm, as seen at I, and the wire from post t being attached to the crossbar D, as seen at I.
- I wind the helix 0 to a resistance much higher than ordinarily given say about six hundred ohms in No. 36 wire.
- a tubular core, B having its end adjacent to the contacts closed, substantially as described, in combination with a helix, O, and proper electrical conuections,for the purpose specified.
Description
(No Model.) 2 Sheets-Sheet 1'. L. TOWNSEND.
TELEPHONE TRANSMITTER.
No. 348,430. Patented Aug. 31, 1886.
F1 1 Z f J z a' WW1 was/c a 6] m u on Fox AMMM 05M QWMX) 2L il 011101 a 30A an N. PETERS. MLRh agnphnr. Wuhington \7- C- 2 Sheets-Sheet 2.
(No Model.)
L. TOWNSEND.
TELEPHONE TRANSMITTER.
No. 348,430. Patented Aug. 31, 1886.
q/vi'bmwwa JIME Mp /w N, PETERS. Phollrljlhognphen Washingiurl. D. C-
UNITED STATES PATENT ()FFICE.
LOUIS TO\VNSEND, OF EVANSVILLE, INDIANA, ASSIGNOR OF ONE-HALF TO JOSEPH L. BAY AND WVILLIAM B. \VORTHEN, BOTH OF LITTLE ROCK,
ARKANSAS.
TELEPHONE-TRANSMITTER.
SPECIFICATION forming part of Letters Patent No. 348,430, dated August 31, 1886.
(No model.)
To all whom, it may concern.-
Be it known that I, LOUIS TOWNSEND, of Evansville, in the county of Vanderburg and State of Indiana, have invented a new and Improved TelephoneTransmitter; and I hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, making part of this specification, in which Figure 1 is a side elevation of the transmitter. Fig. 2 is a longitudinal sectional view on an enlarged scale. Fig. 3 is a plan view of the receiving end with the diaphragm and cap removed. Fig. 4 is a broken section showing the operation of the adjusting-screw. Fig. 5
is a view of a detail.
The object of my invention is to provide a telephonic transmitter having its vibratory contacts under the influence of a strong magnetic field, and red ace the liability of derangement from rough handling and consequent impairment of the utility of the instrument.
To this end my invention consists in certain novel elements and combinations and arrange- 2 5 ments of devices,as hereinafter fully described, and specifically pointed out in the claims.
In order that those skilled in the art may make and use my invention, I will proceed to describe the manner in which I have carried it out.
In the said drawings, A is a trumpet-shaped case, made of hard wood or any other desirable material, and hollowed out to receive an adjusting device and a vibratory contactpoint, as hereinafter set out. Inserted in the case at (L is one end of a short soft-iron tube, which may be made of a piece of gas-pipe seveu-eighths of an inch in diameter and five inches long. This soft-iron tube B forms the 40 core of an electro-magnct, completed by the helix 0, wound thereon, and proper electrical connections. \Vithin the end b of tube B,Where it passes into the case, is inserted a short metal plug, (1, forming a strong magnetic field. Flexibly secured within the case by means of a yielding plate, 6, and at right angles to the end I) of tube B, is an adjusting-bar, D, having in this instance one end curved slightly contact, E.
upward to form a bearing for an adjusting thumb -screw, f, while the opposite end is turned upward at right angles, as seen at g, and affords a bearing for one end of a highlyelastic steel spring, 71, which carries a carbon Firmly secured over the mouth of the case by means of screws 17 z is a dia phragm, made of ordinary sheet-tin, to the center of which is secured another contact-- point, E, the contacts E and E being in operative relation, and that relation susceptible of change by the changing of the position of the cross-bar D through the medium of the setscrew f. Over the end of the casing is fitted a cap, P, provided with a central opening, through which the sound-waves may pass.
- The instrument is connected by means of binding-posts t t t" t, the connections at posts t if being for the primary or battery connections, the wire from t terminating in a contact against the diaphragm, as seen at I, and the wire from post t being attached to the crossbar D, as seen at I. I wind the helix 0 to a resistance much higher than ordinarily given say about six hundred ohms in No. 36 wire.
Having thus described my invention, whatI claim as new, and desire to secure by Letters Patent, is
1. In a telephone, a tubular core, B, hav ing its end adjacent to the contacts closed, substantially as described, in combination with a helix, O, and proper electrical conuections,for the purpose specified.
2. The induction-coil and a proper casing, in combination with atransversc adj Listing-bar, spring 0, screw 1', electrical connections, and vibratory contacts, substantially as described. 8 5
3. The rigid diaphragm, provided with the contact E, in combination with the contact E, sustainingspring h, transverse adjustingbar D, flexibly secured to the case, the induction-coil B O, and proper electrical eonnecgo tions, all constructed, arranged, and operated as set forth.
LOUIS TOIVNSEND.
\Vitnesses:
J. W. NEXsEN, H. P. MONAIR.
Publications (1)
Publication Number | Publication Date |
---|---|
US348430A true US348430A (en) | 1886-08-31 |
Family
ID=2417499
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US348430D Expired - Lifetime US348430A (en) | Telephone-transmitter |
Country Status (1)
Country | Link |
---|---|
US (1) | US348430A (en) |
-
0
- US US348430D patent/US348430A/en not_active Expired - Lifetime
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