US2056011A - System for remotely controlling the frequency of an oscillator circuit - Google Patents
System for remotely controlling the frequency of an oscillator circuit Download PDFInfo
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- US2056011A US2056011A US682131A US68213133A US2056011A US 2056011 A US2056011 A US 2056011A US 682131 A US682131 A US 682131A US 68213133 A US68213133 A US 68213133A US 2056011 A US2056011 A US 2056011A
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- oscillator
- station
- frequency
- remote control
- circuit
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J9/00—Remote-control of tuned circuits; Combined remote-control of tuning and other functions, e.g. brightness, amplification
Definitions
- Another object of my invention is to'provide a circuit arrangement for remotely controlled radio-receiving stations in which the operator at the remote control-station may readily control the beat note frequency of the incoming signaling energy from the remote control station.
- Still another object of-my invention is to pro- Vi'de a circuit-arrangement ina radio receiving system for controlling the operating frequency of an oscillator locatedatthe signal receiving station by line wire from a remote point wherein potential for the operation of the oscillator is supplied from 'a sourcelocated at the remote point 'over the same wires which conduct the signal 'energyfrom the receiving station to the remote control station.
- a further-object of my invention'is to provide anarrangement of signal receiving system including a radioreceiving station and a remote control station interconnected by line wire over which the received radio signals are transmitted to-the: control station and wherein the oscillator at:thereceiving'station has the frequency thereof..-controlled directly from the remote control station over the same wires which transmit the signaling: energy to-the-remote control station.
- object of my invention is to provide a systemfor remotely controlling the frequency ofvan oscillator circuit by adjusting the plate potential suppliedto the oscillator circuit for correspondingly shifting the frequency of the. oscillator circuit within predetermined limits.
- .Dther andtfurther objectsof my invention reside in a circuit arrangement for a remote control system: .employing a high frequency oscillator with means at the control point for adjusting thefrequency of the oscillator asset forthrmore fully in the specification (hereinafter following by reference to the accompanying drawing which diagrammatically land schematically illustrates my invention.
- v-My invention -'is particularly useful, for example,':when: it is desired'that a radioreceiver be used: for the reception of continuous wave .radio telegraphic vcodel'signals.
- :it is. most desirable to employ an electron tube oscillator for obtaining the audio frequency beat-note.
- 'To obtain the proper pitch 'of this'beat note it is necessary to provide a means for varying the frequencyof the oscillatorover a limited range, this means being commonly called a vernier adjustment.
- My invention makes use of the fact that the frequency of anelectron tubeoscillator changes when the voltage impressed on the plate of the electron tube is changed. This is due to the fact that the changein plate voltagecausesa change in the plate impedance which in turn reflects backtinto the grid or input circuit, causing a change in the input capacity, the latter causing the frequencyrof the oscillations to 'change.
- My t invention provides a method of deliberately vary ing the plate voltage of the oscillator thereby indirectlycausing a variation of the frequency emitted .by the oscillator over a limited range sufiicient to selectively adjust the .pitch .of :the heatnote frequencysto'ithe desireddegree.
- My invention provides means for effecting ithe :vernier distant tuning control ofassuperheterodyne receiver, inwhichtthe frequency converting oscillator is provided with means forchangingthe oscillatorfrequency by varying the plate voltage from a distant position.
- A representstheloca- :tion of'thereceiving. apparatus,- a portion of which includesan electron tube oscillating circuit comprising .electron tube I, inductance and capacity 2, grid condenserB, leak 4, sourceof theater voltage-5, grid circuit feedback coil 6 and thecbypass condenser 8 connected-across the leadsrzfl-which extend to the remote control station through the signal conductors 2] tothe source of potential 1.
- -At the distant control-position B, a; potentiometer l8 isprovided, in shunt to thesource of potential Tfor. controlling the efiE-ective; potential impressed upon:the plate circuitof the oscillator -l at station A.
- the voltage impressedjon the .plate of the oscillator is caused-to vary, thereby causing-the oscillationzfrequency to-correspondd ingly vary within predeterminedlimits as desired.
- the direct current supplied by the .potential sourceJ- is selected by potentiometer: L8 and-passed through leads r28land audio fnecuency.
- the leads 20 connect to conductors 2! through audio frequency choke coils H.
- the receiving apparatus at station A has been schematically shown at I2 connected with the antenna ground system indicated at M.
- the output of the audio frequency signal channel is represented at I5 connected to the primary winding of audio frequency transformer l6 having a secondary winding I! connected through blocking condensers l9 to line conductors 2
- connect through blocking condensers 22 interposed between line 2
- the secondarywinding 25 of transformer 24 connects to the input of audio frequency amplifier 26, the output of which connects to the signal indicating means such as telephone headset 21.
- line conductors block the passage of direct current from source 1 but permit the audio frequency signal current to pass therethrough from station A to station B.
- the choke coils I0 and I l in leads 28 and 20 prevent the passage of audio frequency signal currents from the signal line to the plate circuit of the oscillator or to the direct current supply system.
- the arrangement permits the use of the same line wire system for both the audio frequency signal impulses from the receiver and the plate supply potential for the oscillator.
- the oscillator can be used for many other purposes than those here disclosed either in conjunction with radio receivers ortransmitters or any other purposes where a remotely controlled Vernier tuning of an oscillator is required. While I have described my invention in one of its preferred embodiments I desire that it be understood that modifications may be made and that no limitations upon my invention are intended other than those which are imposed by the scope'of the appended claims.
- a remote control system a receiving station, a remote control station, a line wire circuit extending therebetween for transmitting audio frequency signals from said receiving station to said remote control station, signal indicating means at said remote station connected with said line wire circuit for reproducing the signals transmitted from said receiving station, a beat frequency oscillator at said receiving station, connections between said oscillator and said line wire circuit, variable control means including a source of potential at said remote control station, connections between said variable control means and said line wire circuit, and elements in each of the aforesaid connections for preventing the passage The condensers l9 and 22 in the of audio frequency signal energy into said beat frequency oscillator at said receiving station or into said variable control means at said remote control station.
- a remote control system a receiving station, a remote control station, a line wire circuit extending therebetween for transmitting audio frequency signals from said receiving station to said remote control station, signal indicating means at said remote station connected with said line Wire circuit for reproducing the signals transmitted from said receiving station, a beat frequency oscillator at said receiving station, connections between said oscillator and said line wire circuit, variable control means including a source of potential at said remote control station, connections between said variable control means and said line wire circuit, and audio frequency choke coils disposed in each of the aforesaid connections for preventing the passage of audio frequency signal energy into said beat frequency oscillator at said receiving station or into said variable control means at said remote control station.
- a remote control station In a remote control system, a receiving station, a remote control station, a line wire circuit, connections between one end of said line wire circuit and said receiving station, connections between the other end of said line wire circuit and said remote control station, signal indicating means at said remote control station electrically connected with said line wire circuit, a beat frequency oscillator at said receiving station connected with said line wire circuit, a source of plate potential at said remote station for said oscillator, means located at said remote control station and connected with said line wire circuit for controlling the efiective plate potential supplied to said oscillator, and means in each of the aforesaid connections for excluding said plate potential therefrom.
- a receiving station a remote control station, a line wire circuit, connections between one end of said line wire circuit and said receiving station, connections between the other end of said line wire circuit and said remote control station, audio frequency signal indicating means located at said remote control station and responsive to audio frequency signals transmitted over said line wire circuit, a beat frequency oscillator located at said receiving station, connections between said beat frequency oscillator and said line wire circuit, a source of plate potential at said remote station for said oscillator, means located at said remote control station for controlling the effect of said plate potential upon said oscillator, connections between said means and said line wire circuit, means in the first two of the aforesaid connections for preventing the passage of plate potential, and means in the last two of the aforesaid connections for preventing the passage of audio frequency signal energy.
- a receiving station a remote control station, a line wire circuit extending therebetween for transmitting audio frequency signals from said receiving station to said remote control station, signal indicating means connected with said line wire circuit for reproducing the signals transmitted from said receiving station, 'a beat frequency oscillator at said receiving station, connections between said oscillator and said line wire circuit, a plate circuit for said oscillator including a source of potential at said remote station, and a potentransmitting from said receiving station to the remote control point audio frequency signalling energy and simultaneously transmitting in the opposite direction from the remote control point to said receiving station direct current for controlling the frequency of oscillations generated by said oscillator.
Description
' Se t. 29, 1936. P. D. LOWELL 2,056,011
SYSTEM FOR REMOTELY CONTROLLING THE FREQUENCY OF AN OSCILLATOR CIRCUIT Filed July 25, 1933 v 41 5 WK Du QO/WM Patented Sept. 29, 1936 FQPATEENT OFFICE.
SYSTEM 'FOR REMOTELY "CONTROLLING THE "FREQUENCY OF AN OSCILLATOR CIRCUIT Percival .D. 1 Lowell, Chevy-.Chase, Md.,- assignor to Radio Corporation ofAmerica, New :Xork, N. Y., a corporation of Delaware Application July 25, 1933, Serial No. 682,131
6Claims. (Cl. 250-20) 7 -My.invention relates broadly to improvements inradio receiving circuits and more particularly to a means for-controlling thefrequ'ency of an oscillator circuit from a remote control position.
[One of the objects "of "my invention-is to provide asystem for remotely controlling the frequency-of an oscillator circuit for effecting a shiftin the frequency'ofsuch oscillator circuit within predetermined limits.
Another object of my invention is to'provide a circuit arrangement for remotely controlled radio-receiving stations in which the operator at the remote control-station may readily control the beat note frequency of the incoming signaling energy from the remote control station.
Still another object of-my invention is to pro- Vi'de a circuit-arrangement ina radio receiving system for controlling the operating frequency of an oscillator locatedatthe signal receiving station by line wire from a remote point wherein potential for the operation of the oscillator is supplied from 'a sourcelocated at the remote point 'over the same wires which conduct the signal 'energyfrom the receiving station to the remote control station.
.A further-object of my invention'is to provide anarrangement of signal receiving system including a radioreceiving station and a remote control station interconnected by line wire over which the received radio signals are transmitted to-the: control station and wherein the oscillator at:thereceiving'station has the frequency thereof..-controlled directly from the remote control station over the same wires which transmit the signaling: energy to-the-remote control station.
A still further: object of my invention is to provide a systemfor remotely controlling the frequency ofvan oscillator circuit by adjusting the plate potential suppliedto the oscillator circuit for correspondingly shifting the frequency of the. oscillator circuit within predetermined limits. .Dther andtfurther objectsof my invention reside in a circuit arrangement for a remote control system: .employing a high frequency oscillator with means at the control point for adjusting thefrequency of the oscillator asset forthrmore fully in the specification (hereinafter following by reference to the accompanying drawing which diagrammatically land schematically illustrates my invention.
v-My invention -'is particularly useful, for example,':when: it is desired'that a radioreceiver be used: for the reception of continuous wave .radio telegraphic vcodel'signals. In this case,:it is. most desirable to employ an electron tube oscillator for obtaining the audio frequency beat-note. 'To obtain the proper pitch 'of this'beat note it is necessary to provide a means for varying the frequencyof the oscillatorover a limited range, this means being commonly called a vernier adjustment. It is'the' purpose of-my invention to provide a simple and suitable meansof obtaming I this Vernier adjustment either from a position close .to' the receiver-or from-a position located -a substantial distance away from the 10 receiver. a
My invention makes use of the fact that the frequency of anelectron tubeoscillator changes when the voltage impressed on the plate of the electron tube is changed. This is due to the fact that the changein plate voltagecausesa change in the plate impedance which in turn reflects backtinto the grid or input circuit, causing a change in the input capacity, the latter causing the frequencyrof the oscillations to 'change. My t invention provides a method of deliberately vary ing the plate voltage of the oscillator thereby indirectlycausing a variation of the frequency emitted .by the oscillator over a limited range sufiicient to selectively adjust the .pitch .of :the heatnote frequencysto'ithe desireddegree. My invention provides means for effecting ithe :vernier distant tuning control ofassuperheterodyne receiver, inwhichtthe frequency converting oscillator is provided with means forchangingthe oscillatorfrequency by varying the plate voltage from a distant position.
Referring to the drawing which diagrammaticallyshowsmy invention, A representstheloca- :tion of'thereceiving. apparatus,- a portion of which includesan electron tube oscillating circuit comprising .electron tube I, inductance and capacity 2, grid condenserB, leak 4, sourceof theater voltage-5, grid circuit feedback coil 6 and thecbypass condenser 8 connected-across the leadsrzfl-which extend to the remote control station through the signal conductors 2] tothe source of potential 1. -At the distant control-position B, a; potentiometer l8 isprovided, in shunt to thesource of potential Tfor. controlling the efiE-ective; potential impressed upon:the plate circuitof the oscillator -l at station A. By moving theslider or adjustable taps .ofpotentiometer [8, the voltage impressedjon the .plate of the oscillator is caused-to vary, thereby causing-the oscillationzfrequency to-correspondd ingly vary within predeterminedlimits as desired. .The direct current supplied by the .potential sourceJ-is selected by potentiometer: L8 and-passed through leads r28land audio fnecuency. choke coils .jll to the line conductors-2] adjacentcthei entrance of the conductors into distant control station B. At the opposite end of the line adjacent the station A, the leads 20 connect to conductors 2! through audio frequency choke coils H. The receiving apparatus at station A has been schematically shown at I2 connected with the antenna ground system indicated at M. The output of the audio frequency signal channel is represented at I5 connected to the primary winding of audio frequency transformer l6 having a secondary winding I! connected through blocking condensers l9 to line conductors 2|. The opposite end or the line conductors 2| connect through blocking condensers 22 interposed between line 2| and the primary winding 23 of audio frequency transformer 24. The secondarywinding 25 of transformer 24 connects to the input of audio frequency amplifier 26, the output of which connects to the signal indicating means such as telephone headset 21. line conductors block the passage of direct current from source 1 but permit the audio frequency signal current to pass therethrough from station A to station B. The choke coils I0 and I l in leads 28 and 20 prevent the passage of audio frequency signal currents from the signal line to the plate circuit of the oscillator or to the direct current supply system. The arrangement permits the use of the same line wire system for both the audio frequency signal impulses from the receiver and the plate supply potential for the oscillator.
While I have illustrated the source of potential for controlling the frequency of the oscillator as located at the control station E, I desire that it be understood that the source of potential may be located at station A and the effect thereof upon oscillator l regulated by the adjustment of potentiometer I 8. It will be observed that the radio frequency path through the oscillator is completed at station A through bypass condenser 8 and under no circumstances will the high frequency energy tend to pass through leads 20. The direct current is conducted through leads 2!] independently of the high frequency oscillations which are confined to the immediate circuits of the oscillator I.
It is understood, of course, that the oscillator can be used for many other purposes than those here disclosed either in conjunction with radio receivers ortransmitters or any other purposes where a remotely controlled Vernier tuning of an oscillator is required. While I have described my invention in one of its preferred embodiments I desire that it be understood that modifications may be made and that no limitations upon my invention are intended other than those which are imposed by the scope'of the appended claims.
What I claim as new and desire to secure by Letters Patent of the United States is as follows:
1. In a remote control system, a receiving station, a remote control station, a line wire circuit extending therebetween for transmitting audio frequency signals from said receiving station to said remote control station, signal indicating means at said remote station connected with said line wire circuit for reproducing the signals transmitted from said receiving station, a beat frequency oscillator at said receiving station, connections between said oscillator and said line wire circuit, variable control means including a source of potential at said remote control station, connections between said variable control means and said line wire circuit, and elements in each of the aforesaid connections for preventing the passage The condensers l9 and 22 in the of audio frequency signal energy into said beat frequency oscillator at said receiving station or into said variable control means at said remote control station.
2. In a remote control system, a receiving station, a remote control station, a line wire circuit extending therebetween for transmitting audio frequency signals from said receiving station to said remote control station, signal indicating means at said remote station connected with said line Wire circuit for reproducing the signals transmitted from said receiving station, a beat frequency oscillator at said receiving station, connections between said oscillator and said line wire circuit, variable control means including a source of potential at said remote control station, connections between said variable control means and said line wire circuit, and audio frequency choke coils disposed in each of the aforesaid connections for preventing the passage of audio frequency signal energy into said beat frequency oscillator at said receiving station or into said variable control means at said remote control station.
3. In a remote control system, a receiving station, a remote control station, a line wire circuit, connections between one end of said line wire circuit and said receiving station, connections between the other end of said line wire circuit and said remote control station, signal indicating means at said remote control station electrically connected with said line wire circuit, a beat frequency oscillator at said receiving station connected with said line wire circuit, a source of plate potential at said remote station for said oscillator, means located at said remote control station and connected with said line wire circuit for controlling the efiective plate potential supplied to said oscillator, and means in each of the aforesaid connections for excluding said plate potential therefrom.
4. In a remote control system, a receiving station, a remote control station, a line wire circuit, connections between one end of said line wire circuit and said receiving station, connections between the other end of said line wire circuit and said remote control station, audio frequency signal indicating means located at said remote control station and responsive to audio frequency signals transmitted over said line wire circuit, a beat frequency oscillator located at said receiving station, connections between said beat frequency oscillator and said line wire circuit, a source of plate potential at said remote station for said oscillator, means located at said remote control station for controlling the effect of said plate potential upon said oscillator, connections between said means and said line wire circuit, means in the first two of the aforesaid connections for preventing the passage of plate potential, and means in the last two of the aforesaid connections for preventing the passage of audio frequency signal energy.
5. In a remote control system, a receiving station, a remote control station, a line wire circuit extending therebetween for transmitting audio frequency signals from said receiving station to said remote control station, signal indicating means connected with said line wire circuit for reproducing the signals transmitted from said receiving station, 'a beat frequency oscillator at said receiving station, connections between said oscillator and said line wire circuit, a plate circuit for said oscillator including a source of potential at said remote station, and a potentransmitting from said receiving station to the remote control point audio frequency signalling energy and simultaneously transmitting in the opposite direction from the remote control point to said receiving station direct current for controlling the frequency of oscillations generated by said oscillator.
PERCIVAL D. LOWELL.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US682131A US2056011A (en) | 1933-07-25 | 1933-07-25 | System for remotely controlling the frequency of an oscillator circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US682131A US2056011A (en) | 1933-07-25 | 1933-07-25 | System for remotely controlling the frequency of an oscillator circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2056011A true US2056011A (en) | 1936-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US682131A Expired - Lifetime US2056011A (en) | 1933-07-25 | 1933-07-25 | System for remotely controlling the frequency of an oscillator circuit |
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| US (1) | US2056011A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2428300A (en) * | 1944-01-31 | 1947-09-30 | Rca Corp | Ultra high frequency receiving system |
| US2463533A (en) * | 1944-10-14 | 1949-03-08 | Submarine Signal Co | Electrical impedance matching apparatus |
| US2498932A (en) * | 1944-08-18 | 1950-02-28 | Panoramic Radio Corp | High-frequency tuning circuit |
| US2502673A (en) * | 1945-10-23 | 1950-04-04 | Induction Heating Corp | Electrical inverter system |
| US2865990A (en) * | 1953-10-08 | 1958-12-23 | I D E A Inc | Television receiver remote control system |
| US2923815A (en) * | 1956-12-12 | 1960-02-02 | Cgs Lab Inc | Remote tuning of oscillator via duplex conductor |
| US3457372A (en) * | 1965-11-24 | 1969-07-22 | Bell Telephone Labor Inc | Time division switching centers having mutually controlled oscillators |
-
1933
- 1933-07-25 US US682131A patent/US2056011A/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2428300A (en) * | 1944-01-31 | 1947-09-30 | Rca Corp | Ultra high frequency receiving system |
| US2498932A (en) * | 1944-08-18 | 1950-02-28 | Panoramic Radio Corp | High-frequency tuning circuit |
| US2463533A (en) * | 1944-10-14 | 1949-03-08 | Submarine Signal Co | Electrical impedance matching apparatus |
| US2502673A (en) * | 1945-10-23 | 1950-04-04 | Induction Heating Corp | Electrical inverter system |
| US2865990A (en) * | 1953-10-08 | 1958-12-23 | I D E A Inc | Television receiver remote control system |
| US2923815A (en) * | 1956-12-12 | 1960-02-02 | Cgs Lab Inc | Remote tuning of oscillator via duplex conductor |
| US3457372A (en) * | 1965-11-24 | 1969-07-22 | Bell Telephone Labor Inc | Time division switching centers having mutually controlled oscillators |
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