GB462447A - Improvements in high frequency electric oscillators - Google Patents
Improvements in high frequency electric oscillatorsInfo
- Publication number
- GB462447A GB462447A GB29057/36A GB2905736A GB462447A GB 462447 A GB462447 A GB 462447A GB 29057/36 A GB29057/36 A GB 29057/36A GB 2905736 A GB2905736 A GB 2905736A GB 462447 A GB462447 A GB 462447A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- crystal
- cell
- frequency
- frequencies
- 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
- 239000013078 crystal Substances 0.000 abstract 4
- 210000002858 crystal cell Anatomy 0.000 abstract 4
- 210000004027 cell Anatomy 0.000 abstract 3
- 235000009967 Erodium cicutarium Nutrition 0.000 abstract 1
- 240000003759 Erodium cicutarium Species 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 239000011490 mineral wool Substances 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
- H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
- H03B5/34—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being vacuum tube
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
462,447. Piezo-electric crystal mountings. BRITISH THOMSON-HOUSTON CO., Ltd. Oct. 26, 1936, No. 29057. Convention date, Oct. 25, 1935. [Class 40 (v)] [Also in Group XXXVI] An oscillator for checking the carrier frequencies of radio transmitters or for like purposes is tuned by means of a piezoelectric crystal mounted with a tuned circuit in an interchangeable plug 18 which can be inserted into the oscillator. The anode circuit 19, 22 is tuned slightly above the desired frequency, and the frequency is precisely regulated during manufacture by adjusting the relative positions of the crystal cell 20 and coil 19, so as to vary the extent to which the metal electrodes of the cell lie in the magnetic circuit of the coil. The coil 19, Fig. 2, is preferably annular and the crystal cell 20 is soldered to leads 23 which pass through hollow plugs 13 so that the position of the crystal cell can be adjusted by manipulating the leads, which are soldered to the lower ends of the hollow plugs when the frequency is correct. The plane of the cell may be at right angles to that of the coil for the higher frequencies, but for the lower frequencies the cell may be parallel to the coil so that its metallic parts lie to a greater extent in the magnetic field of the latter. A condenser 22 may be shunted on the coil for the lower frequencies but omitted for the higher frequencies. The parts are fixed in position by filling the container 18 with a sealing compound, or for the higher frequencies with rock wool (in order that the filling may not affect the frequency). The crystal cell 20 comprises metallic electrodes 21, Fig. 3, an insulating annulus 25, a crystal 26 with floating electrode 27, and a crow-foot spring 28 for fixing the crystal and making electrical connection.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US46795A US2069633A (en) | 1935-10-25 | 1935-10-25 | Frequency determining unit for piezoelectric crystal controlling oscillators |
Publications (1)
Publication Number | Publication Date |
---|---|
GB462447A true GB462447A (en) | 1937-03-09 |
Family
ID=21945432
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB29057/36A Expired GB462447A (en) | 1935-10-25 | 1936-10-26 | Improvements in high frequency electric oscillators |
Country Status (2)
Country | Link |
---|---|
US (1) | US2069633A (en) |
GB (1) | GB462447A (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2421676A (en) * | 1944-04-07 | 1947-06-03 | Rca Corp | Oscillator |
US2453192A (en) * | 1944-09-08 | 1948-11-09 | Bell Telephone Labor Inc | Moisture impervious vent |
US2469324A (en) * | 1945-02-09 | 1949-05-03 | Rca Corp | Circuit tuner |
US2508720A (en) * | 1947-04-16 | 1950-05-23 | Walter E Kuenstler | Piezoelectric crystal and condenser combination |
US2689885A (en) * | 1950-04-11 | 1954-09-21 | Webster Electric Co Inc | Transducer |
US2731564A (en) * | 1951-11-05 | 1956-01-17 | Edelstein Harold | Barium titanate temperature control |
US2878429A (en) * | 1957-04-10 | 1959-03-17 | Mc Graw Edison Co | Noise eliminators for luminaires |
US3049669A (en) * | 1958-11-07 | 1962-08-14 | James E Johnston | Means for adapting audio oscillators to flashlights |
US3059152A (en) * | 1959-02-05 | 1962-10-16 | Globe Union Inc | Plug-in electronic circuit units and mounting panels |
US3130350A (en) * | 1959-06-22 | 1964-04-21 | Thompson Ramo Wooldridge Inc | Coupling device |
USB326592I5 (en) * | 1961-03-27 | |||
US3578995A (en) * | 1969-09-22 | 1971-05-18 | Dynamics Corp Massa Div | Electroacoustic transducers of the bilaminar flexural vibrating type |
-
1935
- 1935-10-25 US US46795A patent/US2069633A/en not_active Expired - Lifetime
-
1936
- 1936-10-26 GB GB29057/36A patent/GB462447A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2069633A (en) | 1937-02-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2505370A (en) | Piezoelectric crystal unit | |
GB462447A (en) | Improvements in high frequency electric oscillators | |
GB447665A (en) | Improvements in or relating to piezo-electric crystal arrangements | |
GB386356A (en) | Improvements in and relating to high frequency signal transmission systems | |
GB507454A (en) | Improvements in frequency stabilisation arrangements for oscillation generators | |
US1869829A (en) | Frequency-responsive crystal relay | |
US2092069A (en) | Ultra-short wave radio system | |
US2100162A (en) | Magnetron discharge tube apparatus | |
US2076060A (en) | Piezoelectric crystal holder | |
US1960419A (en) | Inductively back-coupled tube generator | |
US1933979A (en) | Oscillator circuit | |
GB584465A (en) | An improved apparatus for varying or modulating the frequency of crystal controlled circuits | |
US2621310A (en) | Thermionic valve | |
GB488564A (en) | Means for supporting mechanically vibrating elements such as piezo electric crystals | |
US3026488A (en) | Frequency modulator having electromechanical oscillator means | |
US2865858A (en) | Alkyl, hydroxyalkyl cellulose grease | |
GB362377A (en) | Improvements in and relating to the control of the phenomena in electric circuits | |
US1201273A (en) | Oscillation-generator. | |
US2492647A (en) | Ultra high frequency oscillator | |
GB147436A (en) | Improvements in wireless transmitters | |
US1822825A (en) | Piezo electric crystal apparatus | |
GB312581A (en) | Piezo-electric crystal oscillator system | |
GB867532A (en) | Improvements in or relating to television receivers | |
GB428581A (en) | Improvements in or relating to electrical oscillation generators | |
Yokoyama | Some aspects of radio telephony in Japan |