US178222A - Improvement in duplex telegraphs - Google Patents
Improvement in duplex telegraphs Download PDFInfo
- Publication number
- US178222A US178222A US178222DA US178222A US 178222 A US178222 A US 178222A US 178222D A US178222D A US 178222DA US 178222 A US178222 A US 178222A
- Authority
- US
- United States
- Prior art keywords
- improvement
- line
- key
- battery
- 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
- IUHPMMLFTNIXHM-UHFFFAOYSA-N [5-(2-amino-6-oxo-3H-purin-9-yl)-2-[[[5-(2-amino-6-oxo-3H-purin-9-yl)-2-[[[5-(2-amino-6-oxo-3H-purin-9-yl)-2-(hydroxymethyl)oxolan-3-yl]oxy-hydroxyphosphoryl]oxymethyl]oxolan-3-yl]oxy-hydroxyphosphoryl]oxymethyl]oxolan-3-yl] [5-(2-amino-6-oxo-3H-purin-9-y Chemical compound C1=NC(C(N=C(N)N2)=O)=C2N1C(OC1COP(O)(=O)OC2C(OC(C2)N2C3=C(C(N=C(N)N3)=O)N=C2)COP(O)(=O)OC2C(OC(C2)N2C3=C(C(N=C(N)N3)=O)N=C2)CO)CC1OP(O)(=O)OCC(O1)C(O)CC1N1C=NC2=C1NC(N)=NC2=O IUHPMMLFTNIXHM-UHFFFAOYSA-N 0.000 description 4
- 230000001939 inductive effect Effects 0.000 description 4
- 230000003068 static Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 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 battery a b is connected at an end to the linewire c, at the other ⁇ end to the closed key e, and in the middle to the ground.
- the connection 3 from the key e to the line c, passes through the induction-coil and core f, and there is a second inductioncoil, g, around the coil f, that is in a shunt between the lineconnection c and the branch 7L to the ground, in which branch h there is a resistance, 7c, that is adjustable.
- the line-connection c bifurcates at i, ing one Waythrough the helix Z to the groundand the other Way through the helix m to the main line s.
- the electro-magnet Zm being wound in the not respond when the connection is made in the'middle, because the current passing from c goes one way through one helix, and the other Way through the other, polarizingv the r is not attracted.
- t is important that the resistance of the branch h and rheostat lc should the same as that of the main line s, so as to cause the current to divide equally at t'.
- the main battery is in a local circuit when the key e is closed; hence, if both sides are equal, there is no current passing upon the main line; but when the key e is open the local circuit is broken,
- the induction-coil f When the key e is closed the induction-coil f is charged, -and it discharges when the key e is opened.
- Thehelixg that has been charged by induction, also discharges, and sets up inZ a current that equals that resulting from the the circuit is closed at e.
- inductioncoils serve to neutralize of the static charge, and prevent any false pulsation on the main line resulting from the return static charge acting in m.
- I claim as my invention-q The battery a Z1 in a local circuit, connected to the line, in which is a circuit-breaker, a nger-key, in combination with the magnet Z m, branch 71 and resistance 7c, and the induction-coils fg, the parts operating substantially as set forth.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Description
`'.lY.A.E 1nrso1\r. DUPLEX TELEGRAPH.
No. 178,222. Patented May 30,1876.
MAIN LINE INDUCTION WIL 3. nessuna: U
MMN BATTERY GGGG ND GGGG ND Y cores, so that the armature UNITED STATES PATENT OFFICE..
NEWARK, NEW JERSEY, AssIGNoR oE 4ONE-HALE His RIGHT To GEORGE E. PREsooTT,
OF NEW YORK CITY.
.IMPROVEMENT |N DUPLEX 'r'El-.EGRAPl-ls.
Specification forming part of Letters Patent No. 178,222., dated May 30, 1876 application filed September 1,
In the accompanying diagram drawing, the battery a b is connected at an end to the linewire c, at the other` end to the closed key e, and in the middle to the ground. The connection 3, from the key e to the line c, passes through the induction-coil and core f, and there is a second inductioncoil, g, around the coil f, that is in a shunt between the lineconnection c and the branch 7L to the ground, in which branch h there is a resistance, 7c, that is adjustable.
The line-connection c bifurcates at i, ing one Waythrough the helix Z to the groundand the other Way through the helix m to the main line s. The electro-magnet Zm, being wound in the not respond when the connection is made in the'middle, because the current passing from c goes one way through one helix, and the other Way through the other, polarizingv the r is not attracted.
t is important that the resistance of the branch h and rheostat lc should the same as that of the main line s, so as to cause the current to divide equally at t'.
understood that station passing through the magnet m, in the usual direction,will cause the armature to respond, whether there is any current passing through the helices or not from the sending-station, and this electromagnet m and armature act as a relay to operate the local circuit s and sounder t. p
The main battery, it will be seen, is in a local circuit when the key e is closed; hence, if both sides are equal, there is no current passing upon the main line; but when the key e is open the local circuit is broken,
portion through Z returning to ct through the branch h and ground.
When the key e is closed the induction-coil f is charged, -and it discharges when the key e is opened. Thehelixg, that has been charged by induction, also discharges, and sets up inZ a current that equals that resulting from the the circuit is closed at e. Thus such inductioncoils serve to neutralize of the static charge, and prevent any false pulsation on the main line resulting from the return static charge acting in m.
It will be apparent that the closing of the keye and the connecting of the battery Z2 with the line tends to set up in the line and to earth currents of opposite polarity to those resulting fromthe battery c, because the positive of the one and the negative of the other are to the ground and line, respectively, and this local circuit (c a 3 e b) serves to maintain an unbroken connection, that offers but little resistance to the pulsation from the distant ceived, ing sent or not.
I claim as my invention-q The battery a Z1 in a local circuit, connected to the line, in which is a circuit-breaker, a nger-key, in combination with the magnet Z m, branch 71 and resistance 7c, and the induction-coils fg, the parts operating substantially as set forth.
Signed by me this 19th day of August, A..
' THOS. A. EDISON. Witnesses:
GHAs. H. SMTTH, GEO. T. PINOKNEY.
or balance the effect
Publications (1)
Publication Number | Publication Date |
---|---|
US178222A true US178222A (en) | 1876-05-30 |
Family
ID=2247629
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US178222D Expired - Lifetime US178222A (en) | Improvement in duplex telegraphs |
Country Status (1)
Country | Link |
---|---|
US (1) | US178222A (en) |
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0
- US US178222D patent/US178222A/en not_active Expired - Lifetime
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