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发明名称
互叫式电话主、副机自动转换器
摘要
本实用新型提供一种互叫式电话主、副机自动转换器。主要由继电器、扬声器、开关、音响集成电路、二极管、电解电容、电池组成。本实用新型与现有技术相比,具有功耗小(转换器在电压由60伏降为6伏时均能无误地工作)、性能可靠、操作方便。有互叫功能和体小价廉的优点。
申请公布号
CN2032380U
申请公布日期
1989.02.08
申请号
CN87215038.0
申请日期
1987.11.03
申请人
乔同生
发明人
乔同生
分类号
H04M1/26
主分类号
H04M1/26
代理机构
代理人
主权项
1、互叫式电话主、付机自动转换器,由主转换器和付转换器组成,本实用新型的特征在于:a所说的主转换器是由继电器[18]、[19]、扬声器[26]、电池[25]、常开型开关[1]、常闭开关[3]、音响集成电路[4]、二极管[6]、[8]、[20]、[12]、电解电容[10]、[22]、电阻[7]、[23]、[21]组成;b所说的付转换器是由扬声器[32]、音响集成电路[31]、常开型开关[29]、常闭开关[30]、电池[33]组成。
地址
辽宁省大连市万岁街69号楼东5-1号
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