GB311055A - Improvements in or relating to piezo-electric substances - Google Patents

Improvements in or relating to piezo-electric substances

Info

Publication number
GB311055A
GB311055A GB9455/28A GB945528A GB311055A GB 311055 A GB311055 A GB 311055A GB 9455/28 A GB9455/28 A GB 9455/28A GB 945528 A GB945528 A GB 945528A GB 311055 A GB311055 A GB 311055A
Authority
GB
United Kingdom
Prior art keywords
crystals
television
oils
depositing
hemihedral
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
GB9455/28A
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 GB9455/28A priority Critical patent/GB311055A/en
Publication of GB311055A publication Critical patent/GB311055A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/85—Piezoelectric or electrostrictive active materials

Landscapes

  • Liquid Crystal Substances (AREA)

Abstract

311,055. Freedman, P., and Rickets, W. J. March 29, 1928. Television. - Substances possessing piezoelectric properties, and also in some cases the property of rotating the plane of polarization of light, are produced artificially from a dielectric material, preferably one with a high dielectric constant, and comprise a multiplicity of suitably orientated hemihedral crystals in close juxtaposition or embedded in a suitable medium. The dielectric may be composed wholly or partly of one or more waxes, hydrogenated fats or oils, or natural resins, either separately or mixed in suitable proportions ; or it may be composed partly of celluloid, vitreous material, or the like. Hemihedral crystal structure is obtained by incorporating one or more optically operative bodies, such as zinc oxide, neutral sulphates of cinchonine, or ouprein, dicamphahexandion, and dicamphahexandionperoxide or the optically-active substances present in the oils and resins can be relied upon. Crystal orientation is obtained (1) by depositing the crystals from a liquid under the influence of an electric field or (2) by depositing the crystals on an electrode from an electrolyte solution or (3) by precipitation from a saturated solution on cooling or evaporation or on addition of a precipitating agent or (4) by a mechanical process such as repeated rolling of the crystalline body. The artificial crystal may be used as a light interrupter in television and like systems.
GB9455/28A 1928-03-29 1928-03-29 Improvements in or relating to piezo-electric substances Expired GB311055A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9455/28A GB311055A (en) 1928-03-29 1928-03-29 Improvements in or relating to piezo-electric substances

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9455/28A GB311055A (en) 1928-03-29 1928-03-29 Improvements in or relating to piezo-electric substances

Publications (1)

Publication Number Publication Date
GB311055A true GB311055A (en) 1929-05-09

Family

ID=9872282

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9455/28A Expired GB311055A (en) 1928-03-29 1928-03-29 Improvements in or relating to piezo-electric substances

Country Status (1)

Country Link
GB (1) GB311055A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2420864A (en) * 1943-04-17 1947-05-20 Chilowsky Constantin Piezoelectric plastic material and method of making same
US3091707A (en) * 1960-04-07 1963-05-28 Bell Telephone Labor Inc Piezoelectric devices utilizing zinc oxide
DE1616606B1 (en) * 1960-04-07 1970-04-30 Western Electric Co Piezoelectric device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2420864A (en) * 1943-04-17 1947-05-20 Chilowsky Constantin Piezoelectric plastic material and method of making same
US3091707A (en) * 1960-04-07 1963-05-28 Bell Telephone Labor Inc Piezoelectric devices utilizing zinc oxide
DE1616606B1 (en) * 1960-04-07 1970-04-30 Western Electric Co Piezoelectric device

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