GB521710A - Improvements relating to remote control systems particularly for radio receivers - Google Patents
Improvements relating to remote control systems particularly for radio receiversInfo
- Publication number
- GB521710A GB521710A GB3394738A GB3394738A GB521710A GB 521710 A GB521710 A GB 521710A GB 3394738 A GB3394738 A GB 3394738A GB 3394738 A GB3394738 A GB 3394738A GB 521710 A GB521710 A GB 521710A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- motor
- control
- receiver
- tuned
- 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
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
- H03J1/06—Driving or adjusting arrangements; combined with other driving or adjusting arrangements, e.g. of gain control
Landscapes
- Selective Calling Equipment (AREA)
Abstract
521,710. Electric control systems. KOLSTER-BRANDES, Ltd., and ARNOLD, J. Nov. 22, 1938, No. 33947. [Class 40 (i)] A wireless receiver is tuned by a motor which also adjusts an auxiliary tuned circuit having a frequency range different from that of the receiver and responding to a variable control frequency in that range to provide, when tuned, a voltage which controls a relay to stop the motor. The control frequency may be transmitted by wireless or over lines which may be the power supply lines, In one arrangement, Fig. 1 (not shown), the auxiliary circuit is tuned by a condenser ganged with the tuning condensers of the receiver, the control range being 50-100 k.c. and the receiver range 550-1,500 k.c. Transmission of a control frequency which does not correspond to the tuning position of the receiver releases a relay controlled by a thermionic valve or discharge-tube to start the motor which rotates the ganged condenser in one direction or the other under the control of reversing contacts operated by a rotary arm at the limits of the travel. When the auxiliary circuit is in tune, the relay operates to stop the motor. In the modification shown in Fig. 2, a control frequency transmitted by oscillator 23 beats with the frequency generated by a frequency changer 25 to produce a predetermined intermediate frequency when the circuits are in tune. The tuning device of the frequency changer is ganged to that of the wireless receiver 35. The motor 26 is controlled by relays 30, 31, 33 controlled by circuits 28, 29 tuned slightly above and below the predetermined intermediate frequency so that when they receive said frequency 30, 31 are both operated and operate 33 to disconnect the motor. When the control frequency is changed, the resultant change in intermediate frequency releases one or other of relays 30, 31 to release 33 and start the motor in a direction dependent on which of relays 30, 31 is released. The release of relay 33 also makes a holding circuit for whichever relay 30, 31 is operated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3394738A GB521710A (en) | 1938-11-22 | 1938-11-22 | Improvements relating to remote control systems particularly for radio receivers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3394738A GB521710A (en) | 1938-11-22 | 1938-11-22 | Improvements relating to remote control systems particularly for radio receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB521710A true GB521710A (en) | 1940-05-29 |
Family
ID=10359433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3394738A Expired GB521710A (en) | 1938-11-22 | 1938-11-22 | Improvements relating to remote control systems particularly for radio receivers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB521710A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2462904A (en) * | 1943-11-19 | 1949-03-01 | Rosen Leo | Telautograph system |
| US2541329A (en) * | 1943-07-09 | 1951-02-13 | Hartford Nat Bank & Trust Co | Apparatus for the remote control of a tunable radio frequency converting system |
-
1938
- 1938-11-22 GB GB3394738A patent/GB521710A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2541329A (en) * | 1943-07-09 | 1951-02-13 | Hartford Nat Bank & Trust Co | Apparatus for the remote control of a tunable radio frequency converting system |
| US2462904A (en) * | 1943-11-19 | 1949-03-01 | Rosen Leo | Telautograph system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB520141A (en) | Improvements in or relating to electrical remote control systems | |
| US2499967A (en) | Push-button tuning signal-seeking receiver | |
| GB469077A (en) | Improvements in or relating to wireless and like receivers | |
| GB521710A (en) | Improvements relating to remote control systems particularly for radio receivers | |
| GB531187A (en) | Control systems for radio receivers or other electric wave apparatus | |
| US1700282A (en) | Selector and automatic tuner for radiocircuits | |
| GB515693A (en) | Improvements in or relating to remote control tuning arrangements particularly for high frequency apparatus | |
| GB625908A (en) | Multi-range oscillator system | |
| US2497524A (en) | Automatic tuning apparatus | |
| US2569296A (en) | Frequency converter with plural selectable oscillators | |
| GB634437A (en) | Improvements in or relating to electrical automatic tuning unit | |
| US2074447A (en) | Control device for radio receivers | |
| US2133128A (en) | Selectivity control | |
| GB524073A (en) | Improvements in radio circuit arrangements employing potential-variable capacity devices | |
| GB518635A (en) | Radio receivers | |
| USRE28632E (en) | Television Tuner | |
| US2930993A (en) | Oscillator tuned automatically to match crystal frequency | |
| GB535385A (en) | Improvements in or relating to the remote control of radio transmitters and receivers | |
| GB501370A (en) | Improvements in or relating to tuning devices for radio receivers | |
| GB465515A (en) | Improvements in wireless receivers | |
| GB518890A (en) | Improvements relating to the remote control of radio receivers | |
| GB557147A (en) | Automatic frequency control in radio circuits | |
| GB519755A (en) | Improvements in and relating to the prevention of interference in radio receivers | |
| GB805240A (en) | Television tuning indicator | |
| GB218336A (en) | Improvements in and relating to electric circuits for use with electric discharge devices, particularly for high-frequency signalling receiving systems |