JPS5618735A - Detecting method for tape tension - Google Patents

Detecting method for tape tension

Info

Publication number
JPS5618735A
JPS5618735A JP9437879A JP9437879A JPS5618735A JP S5618735 A JPS5618735 A JP S5618735A JP 9437879 A JP9437879 A JP 9437879A JP 9437879 A JP9437879 A JP 9437879A JP S5618735 A JPS5618735 A JP S5618735A
Authority
JP
Japan
Prior art keywords
magnetic tape
motor
loaded
circuit
vref
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
JP9437879A
Other languages
Japanese (ja)
Other versions
JPS6034176B2 (en
Inventor
Yoshikazu Nakamura
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP54094378A priority Critical patent/JPS6034176B2/en
Publication of JPS5618735A publication Critical patent/JPS5618735A/en
Publication of JPS6034176B2 publication Critical patent/JPS6034176B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To permit an electronic means to detect that a magnetic tape has been loaded on a machine reel by monitoring the terminal voltage of the reel motor in order to detect whether a tension is applied to the magnetic tape or not.
CONSTITUTION: Until a magnetic tape is loaded on a machine reel a transistor 10 is turned ON or OFF according to the output 1 or 0 from an AND circuit 18, so that a file motor 11 repeats revolution and stop. The terminal voltage of a capacitor 14 increases when the motor 11 rotates, and decreases when the motor 11 stops. A comparison circuit 15 outputs -V0 when the input voltage is Vref (reference voltage)+V0, and +V0 when the input voltage is Vref-V0, and so the circuit 18 outputs a 1. When the magnetic tape is loaded on the machine reel, the motor 11 receiving tension through the magnetic tape increases the number of revolution. Consequently, the terminal voltage of the capacitor 14 no longer agrees with Vref- V0, and so the circuit 18 no longer output 1. Detection thereof this permits the detection of the fact whether the magnetic tape has been loaded or not.
COPYRIGHT: (C)1981,JPO&Japio
JP54094378A 1979-07-24 1979-07-24 Automatic tape attachment detection device Expired JPS6034176B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54094378A JPS6034176B2 (en) 1979-07-24 1979-07-24 Automatic tape attachment detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54094378A JPS6034176B2 (en) 1979-07-24 1979-07-24 Automatic tape attachment detection device

Publications (2)

Publication Number Publication Date
JPS5618735A true JPS5618735A (en) 1981-02-21
JPS6034176B2 JPS6034176B2 (en) 1985-08-07

Family

ID=14108646

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54094378A Expired JPS6034176B2 (en) 1979-07-24 1979-07-24 Automatic tape attachment detection device

Country Status (1)

Country Link
JP (1) JPS6034176B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6135979U (en) * 1984-07-31 1986-03-05 東陶機器株式会社 Drain valve for flushing toilet bowl

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6135979U (en) * 1984-07-31 1986-03-05 東陶機器株式会社 Drain valve for flushing toilet bowl

Also Published As

Publication number Publication date
JPS6034176B2 (en) 1985-08-07

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