US147917A - Improvement in duplex telegraphs - Google Patents
Improvement in duplex telegraphs Download PDFInfo
- Publication number
- US147917A US147917A US147917DA US147917A US 147917 A US147917 A US 147917A US 147917D A US147917D A US 147917DA US 147917 A US147917 A US 147917A
- Authority
- US
- United States
- Prior art keywords
- key
- improvement
- sounder
- magnet
- duplex
- 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
- VXMKYRQZQXVKGB-CWWHNZPOSA-N Tannin Chemical compound O([C@H]1[C@H]([C@@H]2OC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)O[C@H]([C@H]2O)O1)O)C(=O)C1=CC(O)=C(O)C(O)=C1 VXMKYRQZQXVKGB-CWWHNZPOSA-N 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 235000018553 tannin Nutrition 0.000 description 2
- 229920001864 tannin Polymers 0.000 description 2
- 239000001648 tannin Substances 0.000 description 2
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1423—Two-way operation using the same type of signal, i.e. duplex for simultaneous baseband signals
Definitions
- the line a is connected, through the eleetromaguets b c d, to the key c, and the batteryfis divided, half being at each station, as usual.
- g is a rheostat, to prevent the current being shortcircuited, but always to maintain a connection of the line to the earth, even when the key e may be open.
- the batteries k and l are of equal power, and are connect-ed in the circuit Il in opposition to each other, and in that circuit is the sounder 1n, or other indicating-instru ment or call.
- the battery k is connected with the armature circuit-closer operated by the magnet c, and the batteryl with the armature circuit-closer of the magnet d.
- the magnet lf the operator at the distant station closes his key when the key c is closed, the fleet rie tension is increased by the increased energy represented by 50; hence the magnet l' responds by the joint current from both ends, and operates the sounder m by the battery o: but it" the key l. is open, the magnet l responds to the pulsation from the distant station and short-circuits the battery l, allowing the hat tery k to be unbalanced and to operate the sounder m.
- the signal can he received from the distant station whether the key c is open or closed, and the operator can also hear the click of his own magnets e l without aetnating the sounder m.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Magnetic Treatment Devices (AREA)
Description
UNITED STATES PATENT OFFICE.
IMPROVEMENT lN DUPLEX TELEGRAPHS.
si.. it.. ti-.n tannin; par: .-f Lftms l'utt-ut No l I7,9l7. Intell Februari 24,1574;
June?? laA it known that l, 'l`nn.\t.\.- A. I'Ziusox, of .Yr-nark, in the eounty o( l'lssex and State of New Jersey, have invented ltnprmfements in ttrenits t'nr Duplex lilectrie I`ele.graplts, ot' whieh the following is a specification:
l'his invention is for enahlingthe operators at both stations to receive simultaneously, and that without the reeeivuginstrument being atleeted by the signals transmitted from the sante station. I aceomplish these objects by arranging the batteries, circuits, and magnets sothat the receiving portion of theinstrument will only respond to the pulsations from the distant instrument.
In the accompanying diagmm, the line a is connected, through the eleetromaguets b c d, to the key c, and the batteryfis divided, half being at each station, as usual. g is a rheostat, to prevent the current being shortcircuited, but always to maintain a connection of the line to the earth, even when the key e may be open. The batteries k and l are of equal power, and are connect-ed in the circuit Il in opposition to each other, and in that circuit is the sounder 1n, or other indicating-instru ment or call. The battery k is connected with the armature circuit-closer operated by the magnet c, and the batteryl with the armature circuit-closer of the magnet d. In the eireuit 3 is a rheostat, n, of suieient resistance to insure the electricity from the battery o passing through the sounder m when the circuit-close:- of I1 is operated. The instruments at both ends of the line are the same and the adjustments correspond.
The armatures ot' b c d are adjusted to dift'ereut tensions. Suppose, as an illustration, that the magnet d is operated by au electric energy of 50, the magnet c by an energy of300, and the magnet l by an energy of 150, and that :Application tiled the power o( the batteryfis ltltl, but the signal received from one station at the other is only represented by 5U. lf, now, theoperntor closes key 4', bolli the magnets l and e, by the power ol'f, respond, and make and break the circuits to the batteries l and lr, and therel is noaetion on the sounder m or the magnet l'. lf the operator at the distant station closes his key when the key c is closed, the fleet rie tension is increased by the increased energy represented by 50; hence the magnet l' responds by the joint current from both ends, and operates the sounder m by the battery o: but it" the key l. is open, the magnet l responds to the pulsation from the distant station and short-circuits the battery l, allowing the hat tery k to be unbalanced and to operate the sounder m. Thus the signal can he received from the distant station whether the key c is open or closed, and the operator can also hear the click of his own magnets e l without aetnating the sounder m.
y this arrangement the operators al both ends ot` the line can he receiving and sending over one wire, and the sounder or receiving-instrument is only operative from the dist-ant station, and it is operative as well when the key e is open as when it is closed, and vice versa.
I claim as my invention- The batteries l: l o and eircuits and circuitclosers of the eieetroanagnets b e d, in combination with the electro-magnetic sounder or call m and key c, the parts being adjusted to operate substantially in the manner specified.
Signed by me this 23d'day ol` April, A. I).
, THOS. A. EDISON. Witnesses:
Guo. T. ltNeuNx-zf, (uns. Il. Sutra.
Publications (1)
Publication Number | Publication Date |
---|---|
US147917A true US147917A (en) | 1874-02-24 |
Family
ID=2217330
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US147917D Expired - Lifetime US147917A (en) | Improvement in duplex telegraphs |
Country Status (1)
Country | Link |
---|---|
US (1) | US147917A (en) |
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0
- US US147917D patent/US147917A/en not_active Expired - Lifetime
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