US1432354A - Radiosignaling apparatus - Google Patents
Radiosignaling apparatus Download PDFInfo
- Publication number
- US1432354A US1432354A US456882A US45688221A US1432354A US 1432354 A US1432354 A US 1432354A US 456882 A US456882 A US 456882A US 45688221 A US45688221 A US 45688221A US 1432354 A US1432354 A US 1432354A
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- US
- United States
- Prior art keywords
- bridge
- telephone
- wireless
- arms
- 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
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- 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
- This invention relates to a system of telephony including both land lines and wireless, and its object is to provide an improved system whereby signals received by wireless may be transmitted over land lines and whereby a wireless transmitter may be Operated by signals transmitted over land lines.
- my invention l provide a 1l"Vheatstone bridge each of two adjacent arms of which is formed of one winding of a transformer, such, for instance, as those used in land line telephony for connecting the receiver to the line. T0 two opposite junctions of the bridge I connect the wireless receiver and to the other two junctions ll connect the wirelessl transmitter, and l conneet the land line to the other winding of the transformer of one arm.
- rJlhe second inductive arm of the bridge is preferably formed of one winding of a transformer exactly similar to that connect- 40 ing the land line already mentioned to the bridge.
- A, B, C, D is a bridge, two arms, A and B, including the secondary windings A and B of two similar transformers, the windings preferably being o-f high inductance.
- R and R are resistances included in arms A and B for purposes 0f balancing.
- arms C and D are two impedances, such as condensers C" and D', one or both being variable; they may conveniently be air condensers of the kind used in wireless telegraph receivers.
- a land telephone line E To the primary winding A of the transformer in arm A, which prima winding should be of the same order of induc-tance and resistance as the transformers usually associated with land telephone lines, is connected a land telephone line E to a telephone exchange or subscriber.
- an artificial telephone line F which may be adjustable and of magnitude suitable to balance the effect of the land line E.
- an ordinary land telephone subscribers set G or a microphone and telephone of any suitable pattern.
- junction H of arms A and B and the junction J of arms C and D are connected by lea-ds, which may be screened in metal casing, to the receiver of a wireless telephone set with the addition of any magnitiers required to bring the strength of received sigv nals to a value sufficient to be heard at the subscribers instrument in the line E.
- rlhe junctions K of arms A and C, and L of arms B and D are joined by leads, which may be screened by metal casing, to that circuit of the wireless telephone transmitter usually associated with the microphone, with the addition of any magnifiers required to bring the intensity of speech received from. the land line to a value suitable for actuating the wireless telephone transmitter.
- Resistances M N and condenser Q may be provided to join one diagonal, say K L, of the bridge, and a point. Between M and N may be brought to earth potential or some suitable potential with reference to the wireless telephone set.
- r The bridge is balanced by adjusting the arms A, B, C and D so that signals from the wireless telephone receiver do not affect the wireless transmitter. rl ⁇ his adjustment may be found by connecting a telephone to the leads K and L and adjusting the arms until no signals are heard.
- the receiver When speech is impressed on the transmitter from the land line, the receiver will not be affected even if speech frequencies do get into it as it is only affected by radio frequencies from the antenna circuit.
- a Wheatstone bridge having transformer windings in two adjacent arms, a telephone line connected to the other winding of one of the transformers, a wireless telephone receiver connected to two opposite junctions between the arms of the bridge and a wireless telephone transmitter connected to the other two opposite junctions.
- a Wheatstone bridge having transformer windings in two adjacent arms, a telephone line connected to the other winding of one of' the transformers, a wireless telephone receiver having one terminal connected to the junction of the adjacent arms containing-the transformer windings and the other terminal connected to the opposite junction of the bridge and a wireless transmitter connected to the other two opposite junctions of the bridge.
- a Wheatstone bridge having transformer windings in two adjacent arms, a telephone line connected to the other winding of one of the transformers, a balancing line connected to the other winding of the other transformer, a wireless telephone receiver connected to two opposite junctions between the arms of the bridge and a wireless telephone transmitter connected to the other two opposite junctions.
- a n heatstone bridge having transformer windings in two adjacent arms, a telephone line connected to the other winding of one of the transformers, a balancing line connected to the other winding of the other transformer, a wireless telephone receiver having one terminal connected to the junction of the adjacent arms containing the transformer less telephone transmitter connected to ⁇ bhe other two opposite junctions.
- a lVheatstone bridge having transformer windings in two adjacent arms, and condensers in the other two adjacent arms, a telephone line connected to the other winding of one of the transformers, a wireless telephone receiver connected to two opposite junctions between the arms of the bridge and a wireless telephone transmitter connected to the other two opposite junctions.
- a Wheatstone bridge having transformer windings in two adjacent arms, a telephone line connected to the other winding of one of the transformers, a wireless telephone receiver connected to two opposite junctions between the arms of the bridge, a wireless telephone transmitter connected to the other two opposite junctions, and impedances connected across two opposite junctions of the bridge, and means for grounding an intermediate point of such impedances.
- a Iheatstone bridge having transformer windings in two adjacent arms, a telephone line connected to the other winding of the transformers, a balancing line connected to the other winding of the other transformer, 'a wireless telephone receiver connected to two opposite junctions between the arms of the bridge, a wireless telephone transmitter connected to the other two opposite junctions and means in said balancing line for controlling said receiver and transmitter.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Telephonic Communication Services (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Description
W. H. NOTT'AGE.
RADIOSIGNALING APPARATUS.
APPLICATION FILED MAR. 3o, 192|.
l 94322854, Patented Oct. 17, 1922,
@351g flbkoz Patented @et il?, llQZ.
entre@ srarns PATENT @FFHQEO 'WILLIAM HOCKLEY NOTTAGE, OF CHELMSFORD, ENGLAND, ASSIGNOR TO RADIO CORPORATION F AMERICA, A CORPORATION OIE DELAWARE.
RADIOSIGNALING PARATUS.
Application led March 30, 1921. Serial No. 456,882.
To @ZZ whom it may concern Be it known that l, W'ILLrnM HOCKLEPY NofrrAGn, a British subject, and a resident of Chelmsford, England, have invented certain new and useful Improvements in Radiosignaling Apparatus, of which the following is a specification accompanied by drawings.
This invention relates to a system of telephony including both land lines and wireless, and its object is to provide an improved system whereby signals received by wireless may be transmitted over land lines and whereby a wireless transmitter may be Operated by signals transmitted over land lines. According to my invention l provide a 1l"Vheatstone bridge each of two adjacent arms of which is formed of one winding of a transformer, such, for instance, as those used in land line telephony for connecting the receiver to the line. T0 two opposite junctions of the bridge I connect the wireless receiver and to the other two junctions ll connect the wirelessl transmitter, and l conneet the land line to the other winding of the transformer of one arm.
With this arrangement signals coming in to the wireless receiver will not affect the wireless transmitter but will a'ect the land line s0 that they can be heard over that land line. Signals transmitted over the land line will not a'ect the wireless receiver' but will aii'ect the wireless transmitter by which they will be transmitted, because the latter is reresponsive to audible frequencies and the former is only a'ected by radio frequencies from the antenna. I
rJlhe second inductive arm of the bridge is preferably formed of one winding of a transformer exactly similar to that connect- 40 ing the land line already mentioned to the bridge.
It may be necessary to balance the land line by an artificial line in this second transformer, and by providing a microphone and telephone in this line an engineer or operator at the wireless station is enabled to supervise the working. Thus he .can listen in to signals received from the wlreless receiver or land line and can also operate the wireless transmitter through the bridge.
In the accompanying diagram A, B, C, D is a bridge, two arms, A and B, including the secondary windings A and B of two similar transformers, the windings preferably being o-f high inductance.
R and R are resistances included in arms A and B for purposes 0f balancing., In the other arms C and D are two impedances, such as condensers C" and D', one or both being variable; they may conveniently be air condensers of the kind used in wireless telegraph receivers.
To the primary winding A of the transformer in arm A, which prima winding should be of the same order of induc-tance and resistance as the transformers usually associated with land telephone lines, is connected a land telephone line E to a telephone exchange or subscriber.
To the primary winding B of the transformer in arm is connected an artificial telephone line F which may be adjustable and of magnitude suitable to balance the effect of the land line E. To thisartiicial line may be connected an ordinary land telephone subscribers set G or a microphone and telephone of any suitable pattern.
rThe junction H of arms A and B and the junction J of arms C and D are connected by lea-ds, which may be screened in metal casing, to the receiver of a wireless telephone set with the addition of any magnitiers required to bring the strength of received sigv nals to a value sufficient to be heard at the subscribers instrument in the line E.
rlhe junctions K of arms A and C, and L of arms B and D, are joined by leads, which may be screened by metal casing, to that circuit of the wireless telephone transmitter usually associated with the microphone, with the addition of any magnifiers required to bring the intensity of speech received from. the land line to a value suitable for actuating the wireless telephone transmitter.
Resistances M N and condenser Q may be provided to join one diagonal, say K L, of the bridge, and a point. between M and N may be brought to earth potential or some suitable potential with reference to the wireless telephone set.
rThe bridge is balanced by adjusting the arms A, B, C and D so that signals from the wireless telephone receiver do not affect the wireless transmitter. rl`his adjustment may be found by connecting a telephone to the leads K and L and adjusting the arms until no signals are heard.
When speech is impressed on the transmitter from the land line, the receiver will not be affected even if speech frequencies do get into it as it is only affected by radio frequencies from the antenna circuit.
Having described` my invention what I claim is zl. In radio signaling apparatus, a Wheatstone bridge having transformer windings in two adjacent arms, a telephone line connected to the other winding of one of the transformers, a wireless telephone receiver connected to two opposite junctions between the arms of the bridge and a wireless telephone transmitter connected to the other two opposite junctions.
2. In radio signaling apparatus, a Wheatstone bridge having transformer windings in two adjacent arms, a telephone line connected to the other winding of one of' the transformers, a wireless telephone receiver having one terminal connected to the junction of the adjacent arms containing-the transformer windings and the other terminal connected to the opposite junction of the bridge and a wireless transmitter connected to the other two opposite junctions of the bridge.
3. In radio signaling apparatus a Wheatstone bridge having transformer windings in two adjacent arms, a telephone line connected to the other winding of one of the transformers, a balancing line connected to the other winding of the other transformer, a wireless telephone receiver connected to two opposite junctions between the arms of the bridge and a wireless telephone transmitter connected to the other two opposite junctions.
4. In radio signaling apparatus, a n heatstone bridge having transformer windings in two adjacent arms, a telephone line connected to the other winding of one of the transformers, a balancing line connected to the other winding of the other transformer, a wireless telephone receiver having one terminal connected to the junction of the adjacent arms containing the transformer less telephone transmitter connected to `bhe other two opposite junctions.
6. In radio signaling apparatus, a lVheatstone bridge having transformer windings in two adjacent arms, and condensers in the other two adjacent arms, a telephone line connected to the other winding of one of the transformers, a wireless telephone receiver connected to two opposite junctions between the arms of the bridge and a wireless telephone transmitter connected to the other two opposite junctions.
7. In radio signaling apparatus, a Wheatstone bridge having transformer windings in two adjacent arms, a telephone line connected to the other winding of one of the transformers, a wireless telephone receiver connected to two opposite junctions between the arms of the bridge, a wireless telephone transmitter connected to the other two opposite junctions, and impedances connected across two opposite junctions of the bridge, and means for grounding an intermediate point of such impedances.
8. In radio signaling apparatus, a Iheatstone bridge having transformer windings in two adjacent arms, a telephone line connected to the other winding of the transformers, a balancing line connected to the other winding of the other transformer, 'a wireless telephone receiver connected to two opposite junctions between the arms of the bridge, a wireless telephone transmitter connected to the other two opposite junctions and means in said balancing line for controlling said receiver and transmitter.
WILLIAM I'IOCKLEY NOTTAGE.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB15274/20A GB168966A (en) | 1920-06-05 | 1920-06-05 | Improvements in land line and wireless telephony |
FR530544D FR530544A (en) | 1920-06-05 | 1921-02-04 | Wireless and landline telephony enhancements |
US456882A US1432354A (en) | 1920-06-05 | 1921-03-30 | Radiosignaling apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB15274/20A GB168966A (en) | 1920-06-05 | 1920-06-05 | Improvements in land line and wireless telephony |
US456882A US1432354A (en) | 1920-06-05 | 1921-03-30 | Radiosignaling apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
US1432354A true US1432354A (en) | 1922-10-17 |
Family
ID=26251181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US456882A Expired - Lifetime US1432354A (en) | 1920-06-05 | 1921-03-30 | Radiosignaling apparatus |
Country Status (3)
Country | Link |
---|---|
US (1) | US1432354A (en) |
FR (1) | FR530544A (en) |
GB (1) | GB168966A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2725532A (en) * | 1952-12-31 | 1955-11-29 | Itt | Balanced junction device for a two-way telephone repeater |
US2950361A (en) * | 1954-09-01 | 1960-08-23 | Sprague Electric Co | Duplex communication |
US3234333A (en) * | 1962-08-24 | 1966-02-08 | Waters Mfg Inc | Hybrid phone patch |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8319786D0 (en) * | 1983-07-22 | 1983-08-24 | Plessey Co Plc | Adaptive line hybrids |
-
1920
- 1920-06-05 GB GB15274/20A patent/GB168966A/en not_active Expired
-
1921
- 1921-02-04 FR FR530544D patent/FR530544A/en not_active Expired
- 1921-03-30 US US456882A patent/US1432354A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2725532A (en) * | 1952-12-31 | 1955-11-29 | Itt | Balanced junction device for a two-way telephone repeater |
US2950361A (en) * | 1954-09-01 | 1960-08-23 | Sprague Electric Co | Duplex communication |
US3234333A (en) * | 1962-08-24 | 1966-02-08 | Waters Mfg Inc | Hybrid phone patch |
Also Published As
Publication number | Publication date |
---|---|
FR530544A (en) | 1921-12-24 |
GB168966A (en) | 1921-09-05 |
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