GB309276A - Improvements in or relating to means for damping mechanical vibratory devices such as piezo-electric crystals - Google Patents

Improvements in or relating to means for damping mechanical vibratory devices such as piezo-electric crystals

Info

Publication number
GB309276A
GB309276A GB538628A GB538628A GB309276A GB 309276 A GB309276 A GB 309276A GB 538628 A GB538628 A GB 538628A GB 538628 A GB538628 A GB 538628A GB 309276 A GB309276 A GB 309276A
Authority
GB
United Kingdom
Prior art keywords
piezo
relating
electric crystals
mechanical vibratory
vibratory devices
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
GB538628A
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.)
Parlophone Records Ltd
Original Assignee
Gramophone Co 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
Priority to DEG75208D priority Critical patent/DE518651C/en
Application filed by Gramophone Co Ltd filed Critical Gramophone Co Ltd
Priority to GB538628A priority patent/GB309276A/en
Publication of GB309276A publication Critical patent/GB309276A/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 devices; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/05—Holders; Supports
    • H03H9/09—Elastic or damping supports

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

309,276. Gramophone Co., Ltd., Whitaker, A., Tedham, W. F., and Browne, C. O. Feb. 20, 1928. Drawings to Specification. Light-valves. - In a sound-recording system wherein the intensity of a beam of polarized light is modulated by means of a piezo-electric crystal, the crystal is so mounted that it is subject to mechanical damping. The object is to ensure that the crystal will respond efficiently to the higher sideband frequencies of an applied carrier wave modulated with currents of acoustic frequency.
GB538628A 1928-02-20 1928-02-20 Improvements in or relating to means for damping mechanical vibratory devices such as piezo-electric crystals Expired GB309276A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DEG75208D DE518651C (en) 1928-02-20 Piezoelectric crystal arrangement
GB538628A GB309276A (en) 1928-02-20 1928-02-20 Improvements in or relating to means for damping mechanical vibratory devices such as piezo-electric crystals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB538628A GB309276A (en) 1928-02-20 1928-02-20 Improvements in or relating to means for damping mechanical vibratory devices such as piezo-electric crystals

Publications (1)

Publication Number Publication Date
GB309276A true GB309276A (en) 1929-04-11

Family

ID=9795161

Family Applications (1)

Application Number Title Priority Date Filing Date
GB538628A Expired GB309276A (en) 1928-02-20 1928-02-20 Improvements in or relating to means for damping mechanical vibratory devices such as piezo-electric crystals

Country Status (1)

Country Link
GB (1) GB309276A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2452571A (en) * 1933-06-14 1948-11-02 Submarine Signal Co Sound signaling apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2452571A (en) * 1933-06-14 1948-11-02 Submarine Signal Co Sound signaling apparatus

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