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51. 发明专利

JPS55133429A MANUFACTURING OF POLYVINYLIDENE FLUORIDE FILM 失效
公开(公告)号：JPS55133429A
公开(公告)日：1980-10-17
申请号：JP4138879
申请日：1979-04-05
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAKEDA KOUJI , YAMAMOTO KAZUMASA
IPC分类号： C08J7/00 , C08J5/18 , H01G7/02 , H01L41/18 , H01L41/193 , H01L41/22 , H01L41/45
摘要： PURPOSE:To prepare the title film of gamma-crystalline structure, having excellent piezoelectric and pyroelectric properties, without drawing, by casting a solution of polyvinylidene fluoride on a specific alkali halide, and evaporating the solvent by heating. CONSTITUTION:Polyvinylidene fluoride is dissolved in N,N-dimethylacetamide using, e.g. ultrasonic irradiation, to obtain a 20wt% solution. The solution is cast on an alkali halide crystal (e.g. NaCl, KBr, etc.) preheated at, e.g. 80 deg.C. The solvent is evaporated by heating the cast film pref. at

52. 发明专利

JPS5554419A PYROELECTRIC TEMPERATURE SENSOR 失效
公开(公告)号：JPS5554419A
公开(公告)日：1980-04-21
申请号：JP12816778
申请日：1978-10-17
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SUZUMURA MASAKI , TAKEDA KOUJI
IPC分类号： G01J5/02 , G01J5/08 , G01J5/34
摘要： PURPOSE:To obtain a miniature and inexpensive pyroelectric temperature sensor which supplies infrared rays to a pyroelectric material intermittently and then detects them as an alternating-current output, by sliding glass fiber radiated with infrared rays by a reciprocating driver. CONSTITUTION:Pyroelectirc material 6 with electrodes 7 and 7' formed on both sides is arranged in shield body 1 and through glass fiber 9 whose one terminal is connected to window 2 of shield body 1 while the other (free terminal) is moved vertically by reciprocating driver 11 through connecting rod 10, infrared rays are led in and caused to strike pyroelectric material 6. Supplied infrared rays strike intermittently pyroelectric material 6 through the vertical movement of the glass fiber to generate an alternating-current pyroelectric current, which is detected by detection circuit 8 to measure the quantity of incident infrared rays. As the above- mentioned reciprocating driver, an electromagnetic vibrator, bimorph piezoelectric vibrator, etc., can be used to obtain a miniature and inexpensive unit.

53. 发明专利

JPS5554418A PYROELECTRIC TYPE TEMPERATURE SENSOR 失效
公开(公告)号：JPS5554418A
公开(公告)日：1980-04-21
申请号：JP12816678
申请日：1978-10-17
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SUZUMURA MASAKI , TAKEDA KOUJI
IPC分类号： G01J5/02 , G01J5/34
摘要： PURPOSE:To obtain a miniature and inexpensive pyroelectric temperature sensor which supplies infrared rays to a pyroelectric material intermittently and then detects them as an alternating-current output, by sliding a shield plate, which intermits infrared rays, by a reciprocating driver. CONSTITUTION:Pyroelectric material 6 with electrodes 7 and 7' formed on both sides is arranged in shield body 1 and shield plate 9 moved up-down by reciprocating driver 10 irradiates pyroelectric material 6 with infrared rays supplied through window 2 of shield body 1 by way of a light path provided at a halfway point. Supplied infrared rays strike pyroelectric material 6 intermittently through the vertical movement of shield plate 9 to generate an alternating-current pyroelectric current, which is detected by detector circuit 8 to measure the quantity of incident infrared rays. Further, an electromagnetic vibrator, bimorph electric vibrator, etc., can be used as the above-mentioned reciprocating driver to obtain a miniature and inexpensive unit.

54. 发明专利

JPS54151022A DIAPHRAGM FOR SPEAKERS 失效
公开(公告)号：JPS54151022A
公开(公告)日：1979-11-27
申请号：JP5968778
申请日：1978-05-18
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： NOGUCHI HIROTOSHI , YASHIRO MITSURU , TAKEDA KOUJI
IPC分类号： H04R7/02 , H04R7/10 , H04R31/00
摘要： PURPOSE:To obtain the diaphragm of high modulus and large internal loss by directly laminating a non-oriented film composed of polyethylene terephthalate and olefin base resin on a thermoplastic film or the like. CONSTITUTION:Pellets of polyethylene of olefin base are added to pellets of polyethylene terephthalate. While these are mixed with an extruder or the like, a film is drawn out through the T die 1. The non-oriented film 2 thus extruded is directly laminated on the woven or non-woven fabric of organic synthetic fibers, natural fibers, inorganic fibers or a thermoplastic film 3. In this way, polyethylene terephthalate may be directly laminated on other stock of large internal loss without imparing its properties.

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