IT7920053A0 - Filtro elettromeccanico per segnali elettrici. - Google Patents

Filtro elettromeccanico per segnali elettrici.

Info

Publication number: IT7920053A0
Authority: IT; Italy
Prior art keywords: electrical signals; electromechanical filter; electromechanical; filter; signals
Prior art date: 1978-02-15

Application number

IT7920053A

Other languages

English (en)

Other versions

IT1110718B (it

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.)

1978-02-15

Filing date

1979-02-09

Publication date

1979-02-09

1979-02-09 Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd

1979-02-09 Publication of IT7920053A0 publication Critical patent/IT7920053A0/it

1986-01-06 Application granted granted Critical

1986-01-06 Publication of IT1110718B publication Critical patent/IT1110718B/it

Links

Classifications

- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
- H03H9/46—Filters
- H03H9/48—Coupling means therefor
- H03H9/50—Mechanical coupling means

Landscapes

Physics & Mathematics (AREA)
Acoustics & Sound (AREA)
Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

IT20053/79A 1978-02-15 1979-02-09 Filtro elettromeccanico per segnali elettrici IT1110718B (it)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
JP1625978A JPS54109355A (en)	1978-02-15	1978-02-15	Mechanical filter

Publications (2)

Publication Number	Publication Date
IT7920053A0 true IT7920053A0 (it)	1979-02-09
IT1110718B IT1110718B (it)	1986-01-06

Family

ID=11911555

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
IT20053/79A IT1110718B (it)	1978-02-15	1979-02-09	Filtro elettromeccanico per segnali elettrici

Country Status (7)

Country	Link
US (1)	US4241321A (it)
JP (1)	JPS54109355A (it)
CA (1)	CA1139382A (it)
DE (1)	DE2904809A1 (it)
FR (1)	FR2417891B1 (it)
GB (1)	GB2017443B (it)
IT (1)	IT1110718B (it)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4573028A (en) *	1983-11-07	1986-02-25	Rockwell International Corporation	Mechanical filter apparatus having interchanged resonator means for improved coupling of bridging wires
US5006824A (en) *	1986-04-07	1991-04-09	Rockwell International Corporation	Third mode torsional F-M resonator
US5187458A (en) *	1989-09-21	1993-02-16	Nihon Musen Kabushiki Kaisha	Composite longitudinal vibration mechanical filter having central frequency deviation elimination means and method of manufacturing same

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE1112214B (de) *	1957-01-12	1961-08-03	Telefunken Patent	Mechanisches Filter mit Daempfungspolen bei endlichen Frequenzen
DE1252817B (it) *	1957-03-20
IT616267A (it) *	1957-12-12
US2955267A (en) *	1958-08-20	1960-10-04	Bell Telephone Labor Inc	Electromechanical torsional band pass wave filter
DE1257993B (de) *	1961-02-28	1968-01-04	Telefunken Patent	Mechanisches Frequenzfilter
GB1041375A (en) *	1962-06-28	1966-09-07	Telefunken Patent	Mechanical frequency filter
FR2320665A1 (fr) *	1975-08-04	1977-03-04	Telecommunications Sa	Perfectionnements aux filtres electromecaniques passe-bande de frequences
JPS5293044A (en) *	1976-01-30	1977-08-05	Hitachi Ltd	Elevator

1978
- 1978-02-15 JP JP1625978A patent/JPS54109355A/ja active Granted
1979
- 1979-02-08 DE DE2904809A patent/DE2904809A1/de not_active Ceased
- 1979-02-09 IT IT20053/79A patent/IT1110718B/it active
- 1979-02-14 GB GB7905235A patent/GB2017443B/en not_active Expired
- 1979-02-15 FR FR7903883A patent/FR2417891B1/fr not_active Expired
- 1979-02-15 CA CA000321548A patent/CA1139382A/en not_active Expired
- 1979-02-15 US US06/012,390 patent/US4241321A/en not_active Expired - Lifetime

Also Published As

Publication number	Publication date
CA1139382A (en)	1983-01-11
IT1110718B (it)	1986-01-06
FR2417891B1 (fr)	1985-09-20
US4241321A (en)	1980-12-23
JPS54109355A (en)	1979-08-27
DE2904809A1 (de)	1979-08-16
JPH0116055B2 (it)	1989-03-22
GB2017443A (en)	1979-10-03
GB2017443B (en)	1982-05-12
FR2417891A1 (fr)	1979-09-14

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Legal Events

Date	Code	Title	Description
1999-10-27	TA	Fee payment date (situation as of event date), data collected since 19931001	Effective date: 19950227