GB401319A - Improvements in and relating to intermediate frequency transformers for use in wireless reception - Google Patents
Improvements in and relating to intermediate frequency transformers for use in wireless receptionInfo
- Publication number
- GB401319A GB401319A GB1298032A GB1298032A GB401319A GB 401319 A GB401319 A GB 401319A GB 1298032 A GB1298032 A GB 1298032A GB 1298032 A GB1298032 A GB 1298032A GB 401319 A GB401319 A GB 401319A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screws
- coils
- condenser
- intermediate frequency
- spindles
- 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
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/0153—Electrical filters; Controlling thereof
- H03H7/0161—Bandpass filters
- H03H7/0169—Intermediate frequency filters
- H03H7/0176—Intermediate frequency filters witout magnetic core
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
- Details Of Aerials (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
401,319. Wireless receiving-apparatus. COLLE, V. G. V,. and WARD & GOLDSTONE, Ltd., Frederick Road, Pendleton, Manchester. May 5, 1932, No. 12980. [Class 40 (v).] An intermediate frequency transformer for superheterodyne receivers comprises coils d, e wound on bobbins movable on a cylinder b graduated to show the extent of coupling, either or both of the coils carrying on the side farthest from the other, a compression type variable condenser f, which may be connected across it to tune it, the distance between the condenser plates being adjustable by a screw g. Fine adjustment of either of the screws g after assembly is obtained by rotation of the corresponding gear spindle m, geared to a sector h which is engaged by a lug j connected to the corresponding screw g. Initial adjustment of the condensers is effected by means of the screws g prior to their fixation to the lugs h. The screws g, sectors h and spindles m may be of insulating material. The unit is mounted on a base a and is covered by a screening can c, the coils d, e being locked in any position on the support b by any convenient means, and the heads m<1> of the spindles m being arranged to project from the cam. When the primary of the transformer is untuned, its condenser may be used for some other purpose such as coupling to an oscillator circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1298032A GB401319A (en) | 1932-05-05 | 1932-05-05 | Improvements in and relating to intermediate frequency transformers for use in wireless reception |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1298032A GB401319A (en) | 1932-05-05 | 1932-05-05 | Improvements in and relating to intermediate frequency transformers for use in wireless reception |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB401319A true GB401319A (en) | 1933-11-06 |
Family
ID=10014616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1298032A Expired GB401319A (en) | 1932-05-05 | 1932-05-05 | Improvements in and relating to intermediate frequency transformers for use in wireless reception |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB401319A (en) |
-
1932
- 1932-05-05 GB GB1298032A patent/GB401319A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB559717A (en) | Improvements in or relating to variable tuning systems for radio signal receiving apparatus and the like | |
| GB401319A (en) | Improvements in and relating to intermediate frequency transformers for use in wireless reception | |
| GB536412A (en) | Improvements in or relating to wireless receivers with band spreading | |
| US2468071A (en) | Tuning apparatus with straight-line characteristic curve | |
| GB484956A (en) | Improvements in or relating to radio receiving apparatus | |
| GB571787A (en) | Improvements in variable permeability tuning arrangements | |
| US2375911A (en) | Variable inductance tuning | |
| US2069518A (en) | Radio receiver | |
| US2422995A (en) | Tuner construction | |
| GB464970A (en) | Improvements in coupling coil systems for oscillatory electric circuits | |
| GB565795A (en) | Improvements in or relating to radio receivers | |
| GB444608A (en) | Improvements in high frequency coupling coils | |
| US2163051A (en) | Signaling system | |
| GB542395A (en) | Improvements in the tuning arrangements of radio receivers | |
| US2136731A (en) | Electrical apparatus | |
| GB434675A (en) | Improvements in or relating to tuning systems for wireless receiving apparatus and the like | |
| GB412253A (en) | Improvements in and relating to wireless receivers | |
| GB268848A (en) | Improvements in aerial tuning with reaction units for radio service | |
| US1595863A (en) | Indicating device for radio receiving apparatus | |
| US2281709A (en) | Beat oscillator | |
| US1781414A (en) | Radio receiving apparatus | |
| GB605353A (en) | Improvements in or relating to tuning devices for superheterodyne receivers | |
| GB762743A (en) | Circuit-arrangement for frequency-transformation of oscillations of very high frequency | |
| GB227567A (en) | Improvements in or relating to tuning devices for use in wireless transmission or reception apparatus | |
| GB542611A (en) | Improvements in band-spread tuning circuits for radio receivers |