GB243018A - Improvements in or relating to oscillatory circuits and tuning means therefor - Google Patents
Improvements in or relating to oscillatory circuits and tuning means thereforInfo
- Publication number
- GB243018A GB243018A GB28740/25A GB2874025A GB243018A GB 243018 A GB243018 A GB 243018A GB 28740/25 A GB28740/25 A GB 28740/25A GB 2874025 A GB2874025 A GB 2874025A GB 243018 A GB243018 A GB 243018A
- Authority
- GB
- United Kingdom
- Prior art keywords
- constant
- circuits
- capacities
- relating
- inductances
- 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
- H03J3/00—Continuous tuning
- H03J3/28—Continuous tuning of more than one resonant circuit simultaneously, the tuning frequencies of the circuits having a substantially constant difference throughout the tuning range
Abstract
243,018. Telefunken Ges. f³r Drahtlose Telegraphie. Nov. 15, 1924, [Convention date]. Heterodyne receiving systems; tuning- apparatus, construction and control. of. -The natural frequencies of two oscillatory circuits, particularlv in the case of a heterodyne receiver, are simultaneously varied in such a way that over a considerable range the difference between the two frequencies is constant. Thus the circuits I, II, Fig. 1, have different constant inductances L1, L2, and equal variable capacities, Cv ; but the circuit II has in addition a constant capacity Cs in series with Cv. If these elements be suitably chosen then if the two capacities Cv be varied simultaneously by means of a mechanical coupling the frequency difference will be approximately constant over a considerable range. Alternatively the circuits may have different constant capacities C1, C2, and equal variable inductances Lv, a fixed inductance Ls being connected in parallel in one case, as shown in Fig. 3.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE243018X | 1924-11-15 | ||
| DET29538D DE430895C (en) | 1924-11-15 | 1924-11-16 | Circuit arrangement of two oscillating circuits, the differential frequency of which is to be kept constant with the same change in a tuning means |
| US67206A US1890302A (en) | 1925-11-06 | 1925-11-06 | Arrangement for oscillation circuits |
| US629837A US1947229A (en) | 1924-11-15 | 1932-08-22 | Heterodyne receiving system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB243018A true GB243018A (en) | 1926-03-18 |
Family
ID=27431862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28740/25A Expired GB243018A (en) | 1924-11-15 | 1925-11-14 | Improvements in or relating to oscillatory circuits and tuning means therefor |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1947229A (en) |
| DE (1) | DE430895C (en) |
| GB (1) | GB243018A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE970584C (en) * | 1940-09-01 | 1958-10-09 | Georg Von Schaub | Tuning arrangement with band spreading for several shortwave bands |
| DE966751C (en) * | 1942-03-09 | 1957-09-05 | Int Standard Electric Corp | Overlay receiver |
| DE974133C (en) * | 1943-06-08 | 1960-09-22 | Georg Von Dipl-Ing Schaub | Inductive tuning arrangement with core displacement |
| US2486986A (en) * | 1943-06-28 | 1949-11-01 | Rca Corp | Permeability tuning system |
| US2554230A (en) * | 1945-11-20 | 1951-05-22 | Gen Electric | Combined converter and oscillator circuit |
| NL172046C (en) * | 1952-08-26 | Frieseke & Hoepfner Gmbh | HYDRAULIC CHAIN JACK WITH HYDRAULIC LOCK MECHANISM. |
-
1924
- 1924-11-16 DE DET29538D patent/DE430895C/en not_active Expired
-
1925
- 1925-11-14 GB GB28740/25A patent/GB243018A/en not_active Expired
-
1932
- 1932-08-22 US US629837A patent/US1947229A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US1947229A (en) | 1934-02-13 |
| DE430895C (en) | 1926-06-28 |
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