JPS5746342A - Detector for specific position on magnetic tape - Google Patents

Detector for specific position on magnetic tape

Info

Publication number
JPS5746342A
JPS5746342A JP55121755A JP12175580A JPS5746342A JP S5746342 A JPS5746342 A JP S5746342A JP 55121755 A JP55121755 A JP 55121755A JP 12175580 A JP12175580 A JP 12175580A JP S5746342 A JPS5746342 A JP S5746342A
Authority
JP
Japan
Prior art keywords
light source
tape
detected
magnetic tape
turned
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP55121755A
Other languages
Japanese (ja)
Inventor
Fujio Okamura
Nobuo Azuma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP55121755A priority Critical patent/JPS5746342A/en
Publication of JPS5746342A publication Critical patent/JPS5746342A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/05—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container
    • G11B15/06—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container by sensing auxiliary features on record carriers or containers, e.g. to stop machine near the end of a tape
    • G11B15/08—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container by sensing auxiliary features on record carriers or containers, e.g. to stop machine near the end of a tape by photoelectric sensing

Abstract

PURPOSE:To save the power consumption when the end of a tape is detected, by turning on the corresponding light source immediately before a microcomputer decides the presence or absence of the output current of a photoelectric transducer provided via an optical transparent matter at the edge part of a magnetic tape and then turning off the light source immediately after the decision. CONSTITUTION:Photoelectric transducers 1 and 3 are oppositely provided to light sources 2 and 4 at the supply and taken-up reel sides and sandwich a magnetic tape having an optical transparent matter at each end part. Then the working mode is decided by a microcomputer 8 when the end of tape is detected, and the source 2 or 4 is turned on via light source driving circuits 9 and 10 at the supply and take-up reel sides and by the signal of decision. The presence or absence of the output curret is decided for the transducer 1 or 3. If no output current exists, the light source is immediately turned off; while the traveling tape is stopped if the output current exists with the light source turned off. In such way, the end of tape can be detected with a small amount of power consumption.
JP55121755A 1980-09-04 1980-09-04 Detector for specific position on magnetic tape Pending JPS5746342A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55121755A JPS5746342A (en) 1980-09-04 1980-09-04 Detector for specific position on magnetic tape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55121755A JPS5746342A (en) 1980-09-04 1980-09-04 Detector for specific position on magnetic tape

Publications (1)

Publication Number Publication Date
JPS5746342A true JPS5746342A (en) 1982-03-16

Family

ID=14819077

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55121755A Pending JPS5746342A (en) 1980-09-04 1980-09-04 Detector for specific position on magnetic tape

Country Status (1)

Country Link
JP (1) JPS5746342A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01107022U (en) * 1987-12-29 1989-07-19
EP0651384A2 (en) * 1993-11-02 1995-05-03 Lg Electronics Inc. Method for checking top and end of tape for data recording and reproducing apparatus
US5699206A (en) * 1994-10-12 1997-12-16 Hitachi, Ltd. Magnetic recording and reproducing apparatus arranged to save electric power consumed in detecting tape end and reduce load on microprocessor
US10415086B2 (en) 2010-05-21 2019-09-17 Hewlett-Packard Development Company, L.P. Polymerase chain reaction systems

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS45347Y1 (en) * 1966-12-03 1970-01-09
JPS50133812A (en) * 1974-04-08 1975-10-23

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS45347Y1 (en) * 1966-12-03 1970-01-09
JPS50133812A (en) * 1974-04-08 1975-10-23

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01107022U (en) * 1987-12-29 1989-07-19
EP0651384A2 (en) * 1993-11-02 1995-05-03 Lg Electronics Inc. Method for checking top and end of tape for data recording and reproducing apparatus
EP0651384A3 (en) * 1993-11-02 1995-11-29 Gold Star Co Method for checking top and end of tape for data recording and reproducing apparatus.
US5699206A (en) * 1994-10-12 1997-12-16 Hitachi, Ltd. Magnetic recording and reproducing apparatus arranged to save electric power consumed in detecting tape end and reduce load on microprocessor
US6021016A (en) * 1994-10-12 2000-02-01 Hitachi, Ltd. Magnetic recording and reproducing apparatus arranged to save electric power consumed in detecting tape end and reduce load on microprocessor
US6141172A (en) * 1994-10-12 2000-10-31 Hitachi, Ltd. Magnetic recording and reproducing apparatus arranged to save electric power consumed in detecting tape end and reduce load on microprocessor
US6459541B1 (en) 1994-10-12 2002-10-01 Hitachi, Ltd. Magnetic recording and reproducing apparatus arranged to save electric power consumed in detecting tape end and reduce load on microprocessor
US10415086B2 (en) 2010-05-21 2019-09-17 Hewlett-Packard Development Company, L.P. Polymerase chain reaction systems

Similar Documents

Publication Publication Date Title
GB1244214A (en) Two-reel cartridge
JPS52143790A (en) Driving system of light emitting elements
AU7117381A (en) Polarization fluoroimmunoassay with pulsed light source
JPS5746342A (en) Detector for specific position on magnetic tape
ES8501156A1 (en) Optical end-of-tape detection device
JPS5437485A (en) Output stabilizing method for semiconductor laser
JPS5295424A (en) Speed sensitive type power steering
JPS5743238A (en) Microprocessor
DE68919422T2 (en) Battery powered radios with battery saving function.
JPS57173295A (en) Dust-proof cloth fitting method for speaker sound radiation hole
JPS5293343A (en) Thermosensitive recording-type magnetic sheet and cards consisting the reof
JPS6430053A (en) Tape cassette loader
JPS5713307A (en) Position detector
JPS5369004A (en) Optical recorder-reproducer
JPS53114426A (en) Electrostatic recording apparatus
JPS5614174A (en) Photoelectric detector for transparent body of anisotropy
FR2361711A1 (en) MAGNETIC TAPE RECORDER IN CASSETTE
JPS5370874A (en) Electronic wristwatch
JPS5548858A (en) Magnetic tape unit
JPS524206A (en) Taperecorder drive unit
JPS57122687A (en) Driver for reel motor
JPS52122067A (en) Waveguide switching type switch circuit
JPS5355993A (en) Driving system for luminous element
JPS55160379A (en) Display unit for residual quantity of tape
JPS5386276A (en) (54)clock with alarm clock