The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 30, 1982
Filed:
May. 01, 1980
Hiroshi Ohya, Hachiohji, JP;
Kozo Kobayashi, Kodaira, JP;
Nakamichi Corporation, Tokyo, JP;
Abstract
This invention pertains to a fluorescent indicator adapted to indicate a level of a signal to be measured in an acoustic instrument and/or a vertical condition of a magnetic head in a multi-channel tape recorder. The fluorescent indicator comprises a fluorescent indicating tube having a plurality of segment anodes arranged in a row from a lowest level side to a highest level side, pulse generator means to generate clock pulses having the number of pulses corresponding to the level of a signal, and counter means including a plurality of output terminals connected to the respective segment anodes to have output signal sequentially generated corresponding to the count of the clock pulses to operate the segment anodes of the fluorescent indicating tube. The fluorescent indicating tube starts to be operated on starting to count the clock pulses and the segment anodes of the fluorescent indicating tube are sequentially operated from the lowest level side toward the highest level side as the signal level becomes higher. The fluorescent indicator may be applied to a tape recorder having a multi-channel magnetic head and may further comprise a phase difference detector to electrically detect a phase difference between playback outputs of the two different channels on the magnetic head, and the output of the phase difference detector being adapted to operate one of the segment anodes of the fluorescent indicating tube corresponding to the phase difference of the playback outputs.