NL167541C - DEVICE WITH A VARIABLE CAPACITY. - Google Patents

DEVICE WITH A VARIABLE CAPACITY.

Info

Publication number: NL167541C
Authority: NL; Netherlands
Prior art keywords: variable capacity; variable; capacity
Prior art date: 1970-05-14

Application number

NL7105732.A

Other languages

Dutch (nl)

Other versions

NL7105732A (en

NL167541B (en

Original Assignee

Sprague Electric Co

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.)

1970-05-14

Filing date

1971-04-27

Publication date

1981-12-16

1971-04-27 Application filed by Sprague Electric Co filed Critical Sprague Electric Co

1971-11-16 Publication of NL7105732A publication Critical patent/NL7105732A/xx

1981-07-16 Publication of NL167541B publication Critical patent/NL167541B/en

1981-12-16 Application granted granted Critical

1981-12-16 Publication of NL167541C publication Critical patent/NL167541C/en

Links

Classifications

- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G5/00—Tone control or bandwidth control in amplifiers
- H03G5/02—Manually-operated control
- H03G5/04—Manually-operated control in untuned amplifiers
- H03G5/10—Manually-operated control in untuned amplifiers having semiconductor devices
- H03G5/12—Manually-operated control in untuned amplifiers having semiconductor devices incorporating negative feedback

NL7105732.A 1970-05-14 1971-04-27 DEVICE WITH A VARIABLE CAPACITY. NL167541C (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US3708370A	1970-05-14	1970-05-14

Publications (3)

Publication Number	Publication Date
NL7105732A NL7105732A (en)	1971-11-16
NL167541B NL167541B (en)	1981-07-16
NL167541C true NL167541C (en)	1981-12-16

Family

ID=21892360

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL7105732.A NL167541C (en)	1970-05-14	1971-04-27	DEVICE WITH A VARIABLE CAPACITY.

Country Status (5)

Country	Link
US (1)	US3668478A (en)
DE (1)	DE2053618C3 (en)
FR (1)	FR2093498A5 (en)
GB (1)	GB1307665A (en)
NL (1)	NL167541C (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
KR900002640Y1 (en) *	1986-02-10	1990-03-31	알프스 덴기 가부시기 가이샤	Variable resistor
US6054908A (en) *	1997-12-12	2000-04-25	Trw Inc.	Variable bandwidth filter
US6324066B1 (en) *	1999-07-19	2001-11-27	Motorola, Inc.	Surface mountable electronic device
JP5066982B2 (en) *	2007-04-02	2012-11-07	ソニー株式会社	Control device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2591705A (en) *	1949-01-18	1952-04-08	Herlec Corp	Variable capacitor
US2637778A (en) *	1950-10-20	1953-05-05	Sprague Electric Co	Tone compensated volume control
US2790970A (en) *	1951-01-04	1957-04-30	Sprague Electric Co	Audio frequency signal transfer control circuits
US3426267A (en) *	1968-01-18	1969-02-04	Vitramon Inc	Variable resistor-capacitor unit

1970
- 1970-05-14 US US37083A patent/US3668478A/en not_active Expired - Lifetime
- 1970-10-31 DE DE2053618A patent/DE2053618C3/en not_active Expired
1971
- 1971-04-27 NL NL7105732.A patent/NL167541C/en not_active IP Right Cessation
- 1971-05-13 FR FR7117426A patent/FR2093498A5/fr not_active Expired
- 1971-05-13 GB GB1481471*[A patent/GB1307665A/en not_active Expired

Also Published As

Publication number	Publication date
DE2053618C3 (en)	1980-11-13
GB1307665A (en)	1973-02-21
DE2053618A1 (en)	1971-12-02
NL7105732A (en)	1971-11-16
US3668478A (en)	1972-06-06
FR2093498A5 (en)	1972-01-28
NL167541B (en)	1981-07-16
DE2053618B2 (en)	1980-03-06

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Legal Events

Date	Code	Title	Description
1984-12-17	V1	Lapsed because of non-payment of the annual fee