发明名称 |
APPARATUS FOR FREQUENCY STUDIES USING PUNCHED CARDS OR PUNCHED TAPES |
摘要 |
An apparatus for performing frequency studies by employing punched cards includes a randomly occurring impulse generator wherein each impulse initiates an alerting signal. The alerting signal indicates to an operator that he should punch the card at a position indicated by the one of a plurality of lamps which is energized by a stepping device. When the operator punches the card, a circuit means terminates the alerting signal thereby ending the recording cycle.
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申请公布号 |
US3653058(A) |
申请公布日期 |
1972.03.28 |
申请号 |
USD3653058 |
申请日期 |
1970.05.04 |
申请人 |
AB. KONSULTERNA FOR INDUSTRI OCH HANDEL |
发明人 |
CARL A. SUNDBERG |
分类号 |
G06K17/00;G07C3/00;(IPC1-7):G01D1/00 |
主分类号 |
G06K17/00 |
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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