GB698076A - Improvements in or relating to thermostatically controlled quartz crystals - Google Patents
Improvements in or relating to thermostatically controlled quartz crystalsInfo
- Publication number
- GB698076A GB698076A GB2047549A GB2047549A GB698076A GB 698076 A GB698076 A GB 698076A GB 2047549 A GB2047549 A GB 2047549A GB 2047549 A GB2047549 A GB 2047549A GB 698076 A GB698076 A GB 698076A
- Authority
- GB
- United Kingdom
- Prior art keywords
- crystal
- envelope
- plate
- baffle
- bimetallic strip
- 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 title abstract 6
- 239000010453 quartz Substances 0.000 title abstract 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title abstract 2
- 239000010445 mica Substances 0.000 abstract 2
- 229910052618 mica group Inorganic materials 0.000 abstract 2
- 125000006850 spacer group Chemical group 0.000 abstract 2
- 239000000919 ceramic Substances 0.000 abstract 1
- 229910010293 ceramic material Inorganic materials 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000009413 insulation Methods 0.000 abstract 1
- 239000002184 metal Substances 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/08—Holders with means for regulating temperature
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Resistance Heating (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
698,076. Automatic temperature control systems. PYE, Ltd.. July 24, 1950 [Aug. 5, 1949], No. 20475/49. Class 38 (iv). [Also in Group XIII] In a quartz crystal unit to be fitted in an envelope 15, in order to obtain balanced heating of the crystal 10 and of a thermostatic switch 12 controlling the current of an electric heater 18 for the crystal, a thermal baffle 20 is arranged between the heater and the crystal. Moreover, the components are mounted between a pair of spaced plates 13, 14, e.g. circular plates of mica or ceramic material, whose edges contact the wall of the envelope 15 with a sliding fit. The envelope is cylindrical and fitted with a base having pins for electrical connection of the components. The baffle 20, which may be apertured, is said to compensate for the low thermal capacity of the crystal 10 compared with that of a bimetallic strip 22 of the switch. Between the bimetallic strip 22 and a plate 25, on which the strip is mounted and which carries a stationary contact 26, is located an insulating spacer 24. This spacer acts as the dielectric of a condenser formed by the enlarged end 27 of the bimetallic strip and by the plate 25 and which, being in shunt with the switch contacts, acts as a suppressor of interference, as described in Specification 698,089, [Group XXXVII]. The heater element 18 is spaced from the metal baffle-plate 20 by mica or ceramic insulation 21.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2047549A GB698076A (en) | 1949-08-05 | 1949-08-05 | Improvements in or relating to thermostatically controlled quartz crystals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2047549A GB698076A (en) | 1949-08-05 | 1949-08-05 | Improvements in or relating to thermostatically controlled quartz crystals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB698076A true GB698076A (en) | 1953-10-07 |
Family
ID=10146528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2047549A Expired GB698076A (en) | 1949-08-05 | 1949-08-05 | Improvements in or relating to thermostatically controlled quartz crystals |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB698076A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3109155A (en) * | 1961-05-01 | 1963-10-29 | Gen Signal Corp | Protective casing for an ultrasonic transducer |
| US5585686A (en) * | 1989-10-23 | 1996-12-17 | Canon Kabushiki Kaisha | Vibration type actuator device |
| US5917272A (en) * | 1998-06-11 | 1999-06-29 | Vectron, Inc. | Oven-heated crystal resonator and oscillator assembly |
-
1949
- 1949-08-05 GB GB2047549A patent/GB698076A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3109155A (en) * | 1961-05-01 | 1963-10-29 | Gen Signal Corp | Protective casing for an ultrasonic transducer |
| US5585686A (en) * | 1989-10-23 | 1996-12-17 | Canon Kabushiki Kaisha | Vibration type actuator device |
| US5917272A (en) * | 1998-06-11 | 1999-06-29 | Vectron, Inc. | Oven-heated crystal resonator and oscillator assembly |
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