IT982957B - Apparecchiatura elettronica di comando di processo per aree pericolose - Google Patents

Apparecchiatura elettronica di comando di processo per aree pericolose

Info

Publication number: IT982957B
Authority: IT; Italy
Prior art keywords: process control; control equipment; dangerous areas; electronic process; dangerous
Prior art date: 1972-04-06

Application number

IT4923073A

Other languages

English (en)

Italian (it)

Original Assignee

Foxboro 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.)

1972-04-06

Filing date

1973-04-04

Publication date

1974-10-21

1973-04-04 Application filed by Foxboro Co filed Critical Foxboro Co

1974-10-21 Application granted granted Critical

1974-10-21 Publication of IT982957B publication Critical patent/IT982957B/it

Links

Classifications

- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/008—Intrinsically safe circuits

IT4923073A 1972-04-06 1973-04-04 Apparecchiatura elettronica di comando di processo per aree pericolose IT982957B (it)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US24154572A	1972-04-06	1972-04-06

Publications (1)

Publication Number	Publication Date
IT982957B true IT982957B (it)	1974-10-21

Family

ID=22911132

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
IT4923073A IT982957B (it)	1972-04-06	1973-04-04	Apparecchiatura elettronica di comando di processo per aree pericolose

Country Status (7)

Country	Link
JP (1)	JPS4914881A (de)
CA (1)	CA983569A (de)
DE (1)	DE2316039C2 (de)
FR (1)	FR2179151B1 (de)
GB (1)	GB1412036A (de)
IT (1)	IT982957B (de)
NL (1)	NL7304743A (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2359532A1 (fr) *	1976-07-20	1978-02-17	Cit Alcatel	Dispositif de limitation des variations de potentiel des bornes d'une charge alimentee par une source de courant continu a masse flottante
SE414357B (sv) *	1978-08-17	1980-07-21	Asea Ab	Overspenningsskydd for skydd av halvledarkomponenter av lageffekttyp
US4807081A (en) *	1986-09-05	1989-02-21	Raychem Limited	Circuit protection arrangement
US4954923A (en) *	1988-08-19	1990-09-04	Cooper Industries, Inc.	Intrinsic safety module interface
DE3832068A1 (de) *	1988-09-21	1990-03-22	Stahl R Schaltgeraete Gmbh	Explosionsgeschuetzte elektrische sicherheitsbarriere
DE3906621C2 (de) *	1989-03-02	1995-05-04	Hemscheidt Maschf Hermann	Eigensichere Stromversorgungseinheit
GB2238191A (en) *	1989-10-19	1991-05-22	Drexelbrook Controls	Intrinsically safe system
US10418806B2 (en)	2015-03-10	2019-09-17	Hewlett-Packard Development Company, L.P.	Safety protection circuit
US10942499B2 (en) *	2017-08-16	2021-03-09	Honeywell International Inc.	Intrinsic safety (IS) barrier with associated energy limiting apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB1133750A (en) *	1966-12-02	1968-11-13	Foxboro Yoxall Ltd	Electrical barrier device
US3631264A (en) *	1970-02-11	1971-12-28	Sybron Corp	Intrinsically safe electrical barrier system and improvements therein

1973
- 1973-03-07 GB GB1101673A patent/GB1412036A/en not_active Expired
- 1973-03-30 DE DE19732316039 patent/DE2316039C2/de not_active Expired
- 1973-04-04 IT IT4923073A patent/IT982957B/it active
- 1973-04-05 JP JP3911873A patent/JPS4914881A/ja active Pending
- 1973-04-05 CA CA167,990A patent/CA983569A/en not_active Expired
- 1973-04-05 NL NL7304743A patent/NL7304743A/xx unknown
- 1973-04-05 FR FR7312266A patent/FR2179151B1/fr not_active Expired

Also Published As

Publication number	Publication date
DE2316039A1 (de)	1973-10-18
GB1412036A (en)	1975-10-29
JPS4914881A (de)	1974-02-08
AU5251773A (en)	1974-08-22
FR2179151A1 (de)	1973-11-16
FR2179151B1 (de)	1977-08-05
CA983569A (en)	1976-02-10
DE2316039C2 (de)	1984-01-26
NL7304743A (de)	1973-10-09

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