JPS567273A - Magnetic recording and reproducing device - Google Patents

Magnetic recording and reproducing device

Info

Publication number
JPS567273A
JPS567273A JP8135579A JP8135579A JPS567273A JP S567273 A JPS567273 A JP S567273A JP 8135579 A JP8135579 A JP 8135579A JP 8135579 A JP8135579 A JP 8135579A JP S567273 A JPS567273 A JP S567273A
Authority
JP
Japan
Prior art keywords
microcomputer
reel
time corresponding
tape
input
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.)
Granted
Application number
JP8135579A
Other languages
Japanese (ja)
Other versions
JPS6259393B2 (en
Inventor
Yoshinori Okada
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 JP8135579A priority Critical patent/JPS567273A/en
Publication of JPS567273A publication Critical patent/JPS567273A/en
Publication of JPS6259393B2 publication Critical patent/JPS6259393B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

Abstract

PURPOSE: To perform operations such as mode switching easily and accurately, by displaying the time corresponding to the tape residual quantity or the time corresponding to the tape use quantity and by holding the value just before the state.
CONSTITUTION: The light of LED21 is received through the slit of supply reel 9 by phototransistor 23, and the input voltage to microcomputer 15 is made high-level, and the input voltage to microcomputer 15 is made low-level except light receiving. Since microcomputer 15 has reference clocks due to oscillator 17, the input interval of the high level is calculated to obtain angle speed W1 of reel 9. The light of LED29 is received through the slit of take-up reel 11 by phototransistor 31, and angle speed W2 of reel 11 is obtained similarly. Next, microcomputer 15 calculates the time corresponding to the tape residual quantity or the tape use quantity according to prescribed program and calculation expression, and this value is input to digital number display tube 36 through resistance 38W44, and display tube 36 is driven by driver 37. As a result, operations such as mode switching can be performed easily and accurately.
COPYRIGHT: (C)1981,JPO&Japio
JP8135579A 1979-06-29 1979-06-29 Magnetic recording and reproducing device Granted JPS567273A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8135579A JPS567273A (en) 1979-06-29 1979-06-29 Magnetic recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8135579A JPS567273A (en) 1979-06-29 1979-06-29 Magnetic recording and reproducing device

Publications (2)

Publication Number Publication Date
JPS567273A true JPS567273A (en) 1981-01-24
JPS6259393B2 JPS6259393B2 (en) 1987-12-10

Family

ID=13744039

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8135579A Granted JPS567273A (en) 1979-06-29 1979-06-29 Magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS567273A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS538123A (en) * 1976-07-10 1978-01-25 Sankyo Kougaku Kougiyou Kk Long web such as film used length memory
JPS5434521A (en) * 1976-10-22 1979-03-14 Kimura Kiso Koji Kk Enclosed shielding excavator
JPS5813991A (en) * 1981-07-18 1983-01-26 Takasago Thermal Eng Co Lts Latent heat accumulator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS538123A (en) * 1976-07-10 1978-01-25 Sankyo Kougaku Kougiyou Kk Long web such as film used length memory
JPS5434521A (en) * 1976-10-22 1979-03-14 Kimura Kiso Koji Kk Enclosed shielding excavator
JPS5813991A (en) * 1981-07-18 1983-01-26 Takasago Thermal Eng Co Lts Latent heat accumulator

Also Published As

Publication number Publication date
JPS6259393B2 (en) 1987-12-10

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