US297724A - Telephone-repeater - Google Patents
Telephone-repeater Download PDFInfo
- Publication number
- US297724A US297724A US297724DA US297724A US 297724 A US297724 A US 297724A US 297724D A US297724D A US 297724DA US 297724 A US297724 A US 297724A
- Authority
- US
- United States
- Prior art keywords
- telephone
- station
- induction
- repeater
- line
- 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
- 230000001702 transmitter Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/54—Circuits using the same frequency for two directions of communication
- H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
Definitions
- Ill-m De '0@ N. PETERS. Phulo-ljlhcgraplur. Waxhingtnm DC.
- Figure 1 is a sideview of the inductioncoils and transmitters used in my improved device, mounted upon a frame and compactly arranged for convenience in use.
- Fig.2 is a top view of same.
- Fig. 3 is an end view of same.
- Fig. A is a diagram view of the various parts of my device, showing the method of connection.
- Fig. 5 is a diagram view of the various parts of my device, showing a receiving-telephone in place of the rheostat.
- My invention relatcs to the class of devices adapted to convey from one lengthof line electricalwaves or impulses generated in that line, as by means of the telephone and its ordinary accessories, to another line.
- My improvement is especially applicable to telephone-lines, in which, as at present used, serious trouble is 'caused'by induced currents. These induced currents in telephone-lines are, other things beingequal, proportioned to the length of the line between the extreme stations. By means of my invention I greatly reduce these induced currents.
- the letter a denotes the frame or stand, of ordinary insulating material, as wood; I), a repeating-magnet; 0, a helix arranged about the end of this induction-coil joins up to the rheostat, and the other, f, connects with the main wire A, to a point beyond the repeating-station.
- the line from this point (New Haven) to the repeating-station connects with the helix of the duplicate magnet b at this station and then I transmitter through the primary circuit of the induction-coil, amplified in.
- the rheostat interposed between the induction-coils on this secondary circuit being of a sufficient resistance to more than counterbalance the resistance of the wires on either side of the repeatingstation, and the main part of the waves, therefore, following the path of the least resistance, are repeated in thetelephone at New Haven, the farther. station.
- the use of this interposed resistance is to prevent a great portion of the currents from one station from passing over the line to the farther station without passing through the coil 12 or 1;.
- I may use'a receiving-telephone so arranged as to switch into the circuit, thus enabling me to use the telephone as an intermediate, although imperfeet, receiver.
- Myimprovement in this regard is a complete telephone-relay.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Description
(No Model.) 3 SheetsS11eet-1.
D. E. SMITH.
TELEPHONE REPEATER. No. 297,724. Patented Apr. 29, 1884,
(No Model) I 3 Sheets-Sheet 3. D. E. SMITH.
TELEPHONE REPEATEB.
No. 297,724. Patented Apr. 29, 1884.
I .Jv'mamw 04 v #6. 5
Ill-m: De '0@ N. PETERS. Phulo-ljlhcgraplur. Waxhingtnm DC.
. UNITE STATES ATIENT. OFFICE.
DANIEL E.' SMITH, OF HARTFORD, CONNECTICUT.
T ELEPHONE-REPEATER SPECIFICATION forming part of Letters Patent No. 297,724, dated April 29, 1884. I
h Application filed September 27. 1883. (No model.)
To all whom it may concern..-
Be it known that I, DANIEL E; SMITH, of Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Telephone-Repeaters; and I do hereby declare that the following is a full, clear, and exact description thereof, whereby a person skilled in the art can make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.
Like lettersin the figures indicate the same parts.
Figure 1 is a sideview of the inductioncoils and transmitters used in my improved device, mounted upon a frame and compactly arranged for convenience in use. Fig.2 is a top view of same. Fig. 3 is an end view of same. Fig. A is a diagram view of the various parts of my device, showing the method of connection. Fig. 5 is a diagram view of the various parts of my device, showing a receiving-telephone in place of the rheostat.
My inventionrelatcs to the class of devices adapted to convey from one lengthof line electricalwaves or impulses generated in that line, as by means of the telephone and its ordinary accessories, to another line.
My improvement is especially applicable to telephone-lines, in which, as at present used, serious trouble is 'caused'by induced currents. These induced currents in telephone-lines are, other things beingequal, proportioned to the length of the line between the extreme stations. By means of my invention I greatly reduce these induced currents.
In the accompanying drawings, the letter a denotes the frame or stand, of ordinary insulating material, as wood; I), a repeating-magnet; 0, a helix arranged about the end of this induction-coil joins up to the rheostat, and the other, f, connects with the main wire A, to a point beyond the repeating-station. The line from this point (New Haven) to the repeating-station connects with the helix of the duplicate magnet b at this station and then I transmitter through the primary circuit of the induction-coil, amplified in. the secondary circuit of the coil, and pass through to the main line to the farther station, the rheostat interposed between the induction-coils on this secondary circuit being of a sufficient resistance to more than counterbalance the resistance of the wires on either side of the repeatingstation, and the main part of the waves, therefore, following the path of the least resistance, are repeated in thetelephone at New Haven, the farther. station. The use of this interposed resistance is to prevent a great portion of the currents from one station from passing over the line to the farther station without passing through the coil 12 or 1;. Whatever current is generated at the transmitter at one station is thus made effective at the repeatingmagnet, and the great resistance of the secondarie's of the two induction-coils, together with the extra resistance R, will divert the greater part of such current into the desired channel-viz., through the repeating-magnets b orb.
\ In the place of the rheostat in the secondary circuit of the induction-coils, I may use'a receiving-telephone so arranged as to switch into the circuit, thus enabling me to use the telephone as an intermediate, although imperfeet, receiver. Myimprovement in this regard is a complete telephone-relay. The overly- IOO circuits, the said repeating-magnets in 0perative proximity to microphones in local-battery circuits, each battery-circuit including the primary of an induction-coil, the secondaries of the two induction-coils connected in series and with the line beyond the repeating-magnets, and the resistance included in said secondary circuit, all'substantially as described.
DANIEL E. SMITH.
\Vitnesses:
Orms. L. BURDETT, ALBERT (J. TANNER.
Publications (1)
Publication Number | Publication Date |
---|---|
US297724A true US297724A (en) | 1884-04-29 |
Family
ID=2366906
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US297724D Expired - Lifetime US297724A (en) | Telephone-repeater |
Country Status (1)
Country | Link |
---|---|
US (1) | US297724A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20190333729A1 (en) * | 2012-05-29 | 2019-10-31 | Kabushiki Kaisha Toshiba | Tungsten alloy part, and discharge lamp, transmitting tube, and magnetron using the same |
-
0
- US US297724D patent/US297724A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20190333729A1 (en) * | 2012-05-29 | 2019-10-31 | Kabushiki Kaisha Toshiba | Tungsten alloy part, and discharge lamp, transmitting tube, and magnetron using the same |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US297724A (en) | Telephone-repeater | |
US292835A (en) | Apparatus for telephonic transmission | |
US1140946A (en) | Compensating device for telephonic circuits. | |
US552730A (en) | Ahorew b | |
US684615A (en) | Telephone call-bell apparatus. | |
US256753A (en) | Thirds to george w | |
US805901A (en) | Telephone-exchange system. | |
US1554007A (en) | Antiside tone circuits | |
US580166A (en) | John s | |
US255239A (en) | Telephone system | |
US371557A (en) | Means for preventing induction on electrical conductors | |
US777324A (en) | Telephone system. | |
US724594A (en) | Telephone system. | |
US743594A (en) | Telephone circuits and apparatus. | |
US282867A (en) | seely | |
US1347849A (en) | Signaling-circuit | |
US631150A (en) | Telephone-circuit. | |
US911774A (en) | Phantom electric circuit. | |
USRE11837E (en) | William m | |
US573576A (en) | Of same place | |
US485279A (en) | Combined telegraphy and telephony | |
US560762A (en) | John s | |
US504251A (en) | Charles e | |
US863230A (en) | Telephone repeater-circuit. | |
US731166A (en) | Electric telephone system. |