GB698076A - Improvements in or relating to thermostatically controlled quartz crystals - Google Patents

Improvements in or relating to thermostatically controlled quartz crystals

Info

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
Application number
GB2047549A
Inventor
Dennis Quintrell Fuller
Edgar Bowers
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pye Electronic Products Ltd
Original Assignee
Pye Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Pye Ltd filed Critical Pye Ltd
Priority to GB2047549A priority Critical patent/GB698076A/en
Publication of GB698076A publication Critical patent/GB698076A/en
Expired legal-status Critical Current

Links

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)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Resistance Heating (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.
GB2047549A 1949-08-05 1949-08-05 Improvements in or relating to thermostatically controlled quartz crystals Expired GB698076A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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