发明名称 |
COIN EXAMINATION APPARATUS EMPLOYING AN RL RELAXATION OSCILLATOR |
摘要 |
<p>An apparatus for coin testing including an improved inductive sensing arrangement. A coin to be tested is passed through an electromagnetic field produced by an inductor which is part of a resistor-inductor type relaxation oscillator operating at a frequency in the range of approximately 100 kHz to 1 MHz. The resulting shift in frequency of the relaxation oscillator forms the basis for testing the coin. The resistor-inductor relaxation oscillator has a linear frequency response with respect to changes in the effective inductance in the oscillator over a range of inductance suitable for testing coins and produces an output signal which is digital in nature and requires no amplitude discrimination or shaping to be suitable for counting.</p> |
申请公布号 |
MY8700018(A) |
申请公布日期 |
1987.12.31 |
申请号 |
MY19870000018 |
申请日期 |
1987.12.30 |
申请人 |
MARS INCORPORATED |
发明人 |
FREDERICK PAUL HEIMAN |
分类号 |
G07D5/08;G07D;G07F;(IPC1-7):G07D5/08 |
主分类号 |
G07D5/08 |
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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