CA1030258A - Tone signal detection method and apparatus - Google Patents

Tone signal detection method and apparatus

Info

Publication number: CA1030258A
Authority: CA; Canada
Prior art keywords: detection method; signal detection; tone signal; tone; signal
Prior art date: 1972-11-15
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.): Expired

Application number

CA183,053A

Other languages

French (fr)

Inventor

Theodore Titus (Iv)

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.)

Lanier Electronic Laboratories Inc

Original Assignee

Lanier Electronic Laboratories Inc

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.)

1972-11-15

Filing date

1973-10-10

Publication date

1978-04-25

1973-10-10 Application filed by Lanier Electronic Laboratories Inc filed Critical Lanier Electronic Laboratories Inc

1978-04-25 Application granted granted Critical

1978-04-25 Publication of CA1030258A publication Critical patent/CA1030258A/en

Status Expired legal-status Critical Current

Classifications

- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
- G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier

CA183,053A 1972-11-15 1973-10-10 Tone signal detection method and apparatus Expired CA1030258A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US306544A US3882545A (en)	1972-11-15	1972-11-15	Apparatus and method for detecting tone signals occuring within a predetermined frequency range

Publications (1)

Publication Number	Publication Date
CA1030258A true CA1030258A (en)	1978-04-25

Family

ID=23185769

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA183,053A Expired CA1030258A (en)	1972-11-15	1973-10-10	Tone signal detection method and apparatus

Country Status (4)

Country	Link
US (1)	US3882545A (en)
JP (1)	JPS5416844B2 (en)
CA (1)	CA1030258A (en)
GB (1)	GB1441150A (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4024414A (en) *	1973-10-31	1977-05-17	Bertram Frederick McCarthy	Electrical circuit means for detecting the frequency of input signals
GB1457294A (en) *	1974-01-05	1976-12-01	Ferranti Ltd	Pulse-frequency sensitive switching circuit arrangements felx
JPS51101715A (en) *	1975-03-06	1976-09-08	Nippon Kokan Kk	RENZOKUSHODONNYORUKOIRUNAGATEHOKONO ZAISHITSUKINITSUSEINISUGURETA ARUMINIUMUKIRUDOREIENKOHANNOSEIZOHOHO
US4015082A (en) *	1975-03-13	1977-03-29	Westinghouse Electric Corporation	Multi-channel signal decoder
US4179714A (en) *	1975-09-30	1979-12-18	Olympus Optical Company, Ltd.	Method of recording an index signal in dictating tape recorder
US4167004A (en) *	1978-03-30	1979-09-04	Bethlehem Steel Corporation	Apparatus for detecting plural repetitive signals
US4352173A (en) *	1979-04-09	1982-09-28	Lanier Business Products, Inc.	Dictation display device
US4399527A (en) *	1979-04-09	1983-08-16	Lanier Business Products, Inc.	Dictation display device
US4301330A (en) *	1979-09-28	1981-11-17	Zenith Radio Corporation	Loudspeaker protection circuit
US4348669A (en) *	1980-05-05	1982-09-07	Braun Dudley E	Load energizing and de-energizing control system and method
US4357549A (en) *	1980-12-02	1982-11-02	U.S. Government As Represented By The Director Of National Security Agency	Automatic frequency alteration circuit
US4818989A (en) *	1984-03-27	1989-04-04	Rockwell International Corporation	Selective calling decoder
US4893202A (en) *	1988-03-16	1990-01-09	Lectrolarm Custom Systems, Inc.	Video tape recorder control system
AT393569B (en) *	1988-10-13	1991-11-11	Philips Nv	SYSTEM FOR RECORDING AND EVALUATING MARKER SIGNALS
JP6654155B2 (en)	2017-01-10	2020-02-26	Kddi株式会社	Optical transmission system, PON system and transmission method
KR102562540B1 (en) *	2022-11-07	2023-08-02	주식회사 이시엘	Method for regeneration of activated carbon

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3509549A (en) *	1965-09-03	1970-04-28	Victor Company Of Japan	Magnetic recording and reproducing of cue signals,including pulse width discrimination for cue signal selection
US3581217A (en) *	1968-11-05	1971-05-25	Wayne R Isaacs	Frequency to direct current converter circuit
US3678221A (en) *	1969-09-11	1972-07-18	Minnesota Mining & Mfg	Detection of recorded control signals upon reproduction from recording medium

1972
- 1972-11-15 US US306544A patent/US3882545A/en not_active Expired - Lifetime
1973
- 1973-10-10 CA CA183,053A patent/CA1030258A/en not_active Expired
- 1973-10-31 GB GB5054773A patent/GB1441150A/en not_active Expired
- 1973-11-13 JP JP12683473A patent/JPS5416844B2/ja not_active Expired

Also Published As

Publication number	Publication date
US3882545A (en)	1975-05-06
GB1441150A (en)	1976-06-30
JPS5416844B2 (en)	1979-06-26
JPS50811A (en)	1975-01-07

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