发明名称 |
Successive key operating mechanism for telephone dialing |
摘要 |
Described herein is a circulatory operation for entering information into a memory of a telephone device. The operation consists of alphabetical and numeric co-characters, which may be selectively entered into a memory by successively pressing a single key to select the proper character. Each key is associated with a counter connected with a decoder for providing an output to enable the key. A pair of latches coupled with the keys and a control device acts to temporarily latch the keyed input data information for output thereof. A frequency generating device is also connected to the counter to provide a key scanning signal. Memory device coupled with an enabling key through a flip/flop circuit are used to store the keyed input data information and provide a key code therefrom. A comparator is also included between the latches and memory device for comparing input data information from the latches and outputting the compared key information therefrom.
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申请公布号 |
US4825464(A) |
申请公布日期 |
1989.04.25 |
申请号 |
US19870133308 |
申请日期 |
1987.12.16 |
申请人 |
INVENTA ELECTRONIC CO., LTD. |
发明人 |
WEN, SAYLING |
分类号 |
H04M1/2745;H04M11/06;(IPC1-7):H04M1/272 |
主分类号 |
H04M1/2745 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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