JPS55146657A - Performance-end detector of record player - Google Patents

Performance-end detector of record player

Info

Publication number
JPS55146657A
JPS55146657A JP5306979A JP5306979A JPS55146657A JP S55146657 A JPS55146657 A JP S55146657A JP 5306979 A JP5306979 A JP 5306979A JP 5306979 A JP5306979 A JP 5306979A JP S55146657 A JPS55146657 A JP S55146657A
Authority
JP
Japan
Prior art keywords
shutter plate
slits
photo
transistor
tone arm
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
JP5306979A
Other languages
Japanese (ja)
Inventor
Shiyunkichi Hioki
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.)
KATO DENKI KK
KATO ELECTRIC
Original Assignee
KATO DENKI KK
KATO ELECTRIC
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 KATO DENKI KK, KATO ELECTRIC filed Critical KATO DENKI KK
Priority to JP5306979A priority Critical patent/JPS55146657A/en
Publication of JPS55146657A publication Critical patent/JPS55146657A/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
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/02—Arrangements of heads
    • G11B3/08—Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers
    • G11B3/095—Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers for repeating a part of the record; for beginning or stopping at a desired point of the record
    • G11B3/0952—Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers for repeating a part of the record; for beginning or stopping at a desired point of the record using automatic means
    • G11B3/0957—Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers for repeating a part of the record; for beginning or stopping at a desired point of the record using automatic means using optical means for detecting the end of the recording or the desired point thereof

Abstract

PURPOSE:To make it easy to manufacture a shutter plate while preventing malfunction, by using positive and negative pulses generated by a photo interrupter when light is detected and cut off through the shutter plate. CONSTITUTION:Shutter plate 5 provided with relatively-wide slits 5a passes between slits provided to photo interrupter 6 serving as a tone arm moving-speed detection part. As the end of record performance approaches, photo transistor 8 repeats photo detection and shielding through slits 5a, and consequently positive and negative pulses are generated and supplied via differentiating circuit 9 and voltage stabilizing method 15 to pulse generating part 10, whose output is used as well as that of transistor 8 to make decision 11 on whether a modulated groove exists. When there is no modulated groove, relay circuit 13 is controlled by pulses from generating part 12, so that tone arm driving circuit 14 will be brought under control.
JP5306979A 1979-04-28 1979-04-28 Performance-end detector of record player Pending JPS55146657A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5306979A JPS55146657A (en) 1979-04-28 1979-04-28 Performance-end detector of record player

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5306979A JPS55146657A (en) 1979-04-28 1979-04-28 Performance-end detector of record player

Publications (1)

Publication Number Publication Date
JPS55146657A true JPS55146657A (en) 1980-11-15

Family

ID=12932523

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5306979A Pending JPS55146657A (en) 1979-04-28 1979-04-28 Performance-end detector of record player

Country Status (1)

Country Link
JP (1) JPS55146657A (en)

Similar Documents

Publication Publication Date Title
JPS52143790A (en) Driving system of light emitting elements
JPS5449147A (en) Recorder
JPS55146657A (en) Performance-end detector of record player
JPS5642223A (en) Light source device for endscope
JPS53136424A (en) Correlative processing system for picture signal
JPS53105992A (en) Stabilizing circuit for lumious element output
MX168980B (en) POLYOLEFINES STABILIZED AGAINST OXIDATIVE DEGRADATION, WITH MIXTURES OF DIARYLAMINS SUBSTITUTED WITH ARALKYL AND PHOSPHYTES ESTERICALLY IMPAIRED.
JPS56123125A (en) Photoelectric detector
JPS5412579A (en) Light output stabilizing method
JPS57120208A (en) Magnetic recording and reproducing device
SU1200342A1 (en) Switching device for magnetic head
JPS56138728A (en) Focal plane shutter
JPS55154789A (en) Driving circuit for semiconductor laser
JPS546750A (en) Transistor amplifying device
JPS5342747A (en) Optical logic device device
JPS5294029A (en) Monitoring method of optical detecting circuit
JPS5539430A (en) Load driving circuit
JPS53144304A (en) Optical recorder-reproducer
JPS5579182A (en) Thermal printer
JPS5746305A (en) Controller of tape recorder
JPS5613563A (en) Automatic return unit for tone arm
GB1528172A (en) Photo-sensing apparatus
JPS6410429A (en) Laser diode driving device
JPS5673968A (en) Original read-in method
JPS5540444A (en) Frame feeding device of projector