JPS5622235A - Preannouncement unit for end of tape - Google Patents

Preannouncement unit for end of tape

Info

Publication number
JPS5622235A
JPS5622235A JP1165676A JP1165676A JPS5622235A JP S5622235 A JPS5622235 A JP S5622235A JP 1165676 A JP1165676 A JP 1165676A JP 1165676 A JP1165676 A JP 1165676A JP S5622235 A JPS5622235 A JP S5622235A
Authority
JP
Japan
Prior art keywords
unit
pulse
tape
generator
width
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
JP1165676A
Other languages
Japanese (ja)
Inventor
Yoshitaka Kanemoto
Shoichi 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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP1165676A priority Critical patent/JPS5622235A/en
Publication of JPS5622235A publication Critical patent/JPS5622235A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To shorten the time when recording is impossible at the end of a tape, by automatically operating a preannouncing method when the remaining tape becomes less by making use of a change in rotating speed of a reel.
CONSTITUTION: This unit is equipped with generating unit 1 that outputs a pulse signal according to the rotation of the reel and generator 2 that outputs a reference pulse. Then, the pulse signal from unit 1 is differentiated and generator 2 is triggered to obtain a reference pulse of fixed width. Output pulses from unit 1 and generator 2 are compared 3 in terms of pulse width and when both pulses become equal in width, alarm unit L is put into operation. After both pulse widths coincide, lamp L is turned on-off and the intermittent operation is quickened as the end of the tape comes closer, thereby making announcement of that.
COPYRIGHT: (C)1981,JPO&Japio
JP1165676A 1976-02-05 1976-02-05 Preannouncement unit for end of tape Pending JPS5622235A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1165676A JPS5622235A (en) 1976-02-05 1976-02-05 Preannouncement unit for end of tape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1165676A JPS5622235A (en) 1976-02-05 1976-02-05 Preannouncement unit for end of tape

Publications (1)

Publication Number Publication Date
JPS5622235A true JPS5622235A (en) 1981-03-02

Family

ID=11783999

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1165676A Pending JPS5622235A (en) 1976-02-05 1976-02-05 Preannouncement unit for end of tape

Country Status (1)

Country Link
JP (1) JPS5622235A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3146432A (en) * 1960-10-03 1964-08-25 Ampex Velocity or frequency sensing means

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3146432A (en) * 1960-10-03 1964-08-25 Ampex Velocity or frequency sensing means

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