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GB414764A - Improvements in mechanical frequency standards such as piezoelectric crystals - Google Patents

Improvements in mechanical frequency standards such as piezoelectric crystals

Info

Publication number
GB414764A
GB414764A GB435933A GB435933A GB414764A GB 414764 A GB414764 A GB 414764A GB 435933 A GB435933 A GB 435933A GB 435933 A GB435933 A GB 435933A GB 414764 A GB414764 A GB 414764A
Authority
GB
United Kingdom
Prior art keywords
crystal
mechanical frequency
frequency standards
nodal lines
paint
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
GB435933A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB435933A priority Critical patent/GB414764A/en
Publication of GB414764A publication Critical patent/GB414764A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/05—Holders or supports
    • H03H9/09—Elastic or damping supports

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Paints Or Removers (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

414,764. Mechanical frequency standards. STANDARD TELEPHONES & CABLES, Ltd., Connaught House, Aldwych, London.-(Tournier, M. C. ; 46, Avenue de Breteuil, Paris.) Feb. 13, 1933, No. 4359. [Class 40 (v).] Relates to mechanical frequency standards such as piezo-electric crystals, and has for its object the elimination of spurious resonances. According to one aspect of the invention, the crystal 1, is freely supported and its nodal lines 2, 3, are determined, as by dusting the vibrating crystal with lycopodium powder. The crystal is then loaded along the nodal lines, e.g. by spots of paint, and /or supported by means of at least three sharp points, not in a straight line, chosen on the nodal lines. According to another aspect of the invention, the figure assumed by the lycopodium powder is photographed, and a hill-and-dale reproduction used to support the crystal. Other means for damping spurious vibrations include bevelling the edges of the crystal, (Figs. not shown) and damping the edges with paint or spongy rubber.
GB435933A 1933-02-13 1933-02-13 Improvements in mechanical frequency standards such as piezoelectric crystals Expired GB414764A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB435933A GB414764A (en) 1933-02-13 1933-02-13 Improvements in mechanical frequency standards such as piezoelectric crystals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB435933A GB414764A (en) 1933-02-13 1933-02-13 Improvements in mechanical frequency standards such as piezoelectric crystals

Publications (1)

Publication Number Publication Date
GB414764A true GB414764A (en) 1934-08-13

Family

ID=9775685

Family Applications (1)

Application Number Title Priority Date Filing Date
GB435933A Expired GB414764A (en) 1933-02-13 1933-02-13 Improvements in mechanical frequency standards such as piezoelectric crystals

Country Status (1)

Country Link
GB (1) GB414764A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE903471C (en) * 1937-05-14 1954-02-08 Int Standard Electric Corp Electromechanical vibration system
US3069572A (en) * 1958-12-02 1962-12-18 James Knights Company Piezoelectric device
US3114848A (en) * 1959-02-05 1963-12-17 Bosch Arma Corp High efficiency sonic generator
US3317761A (en) * 1964-05-12 1967-05-02 Bell Telephone Labor Inc Resonant and antiresonant vibratory members attached to a crystal
US4041335A (en) * 1965-10-26 1977-08-09 Matsushita Electric Industrial Co., Ltd. Piezoelectric ceramic resonator with vibration damping means

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE903471C (en) * 1937-05-14 1954-02-08 Int Standard Electric Corp Electromechanical vibration system
US3069572A (en) * 1958-12-02 1962-12-18 James Knights Company Piezoelectric device
US3114848A (en) * 1959-02-05 1963-12-17 Bosch Arma Corp High efficiency sonic generator
US3317761A (en) * 1964-05-12 1967-05-02 Bell Telephone Labor Inc Resonant and antiresonant vibratory members attached to a crystal
US4041335A (en) * 1965-10-26 1977-08-09 Matsushita Electric Industrial Co., Ltd. Piezoelectric ceramic resonator with vibration damping means

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