EP0933794A3 - Electric safety switch - Google Patents

Electric safety switch Download PDF

Info

Publication number
EP0933794A3
EP0933794A3 EP99101984A EP99101984A EP0933794A3 EP 0933794 A3 EP0933794 A3 EP 0933794A3 EP 99101984 A EP99101984 A EP 99101984A EP 99101984 A EP99101984 A EP 99101984A EP 0933794 A3 EP0933794 A3 EP 0933794A3
Authority
EP
European Patent Office
Prior art keywords
cam
casing
axis
contacts
actuator
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.)
Granted
Application number
EP99101984A
Other languages
German (de)
French (fr)
Other versions
EP0933794A2 (en
EP0933794B1 (en
Inventor
Bernardo Pizzato
Marco Pizzato
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.)
Pizzato Elettrica SRL
Original Assignee
Pizzato Elettrica SRL
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 Pizzato Elettrica SRL filed Critical Pizzato Elettrica SRL
Publication of EP0933794A2 publication Critical patent/EP0933794A2/en
Publication of EP0933794A3 publication Critical patent/EP0933794A3/en
Application granted granted Critical
Publication of EP0933794B1 publication Critical patent/EP0933794B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H27/00—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings
    • H01H27/002—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings wherein one single insertion movement of a key comprises an unlocking stroke and a switch actuating stroke, e.g. security switch for safety guards
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H27/00—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings
    • H01H27/002—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings wherein one single insertion movement of a key comprises an unlocking stroke and a switch actuating stroke, e.g. security switch for safety guards
    • H01H2027/005—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings wherein one single insertion movement of a key comprises an unlocking stroke and a switch actuating stroke, e.g. security switch for safety guards the key receiving part having multiple openings to allow keys from different directions to operate the switch

Abstract

A safety electric switch, comprising a casing (2,3,4) with at least two slots (18, 19) for the insertion of a key actuator (20) of pre-defined shape, at least one pair of electric contacts (5,5', 6,6',7,7',8,8') disposed in the casing (3) and displaceable between a closed and an open position, a cam (15) mounted inside the casing (4) and operatively connected to the contacts to promote their movement and commutation, the cam being rotatable around a first axis (H) by insertion of the actuator in the casing, blocking means (22) adapted to prevent rotation of the cam (15) and the consequent displacement of the contacts, elastic means (23) acting on the blocking means (22) to maintain them in a cam blocking position when the actuator is disinserted from the casing. The blocking means (22) comprise at least one lever element (24,24') pivoted about a second axis (K) distal from the first axis (H) and positioned so as to act on one side face of the cam (15). The second pivot axis (K) is substantially parallel to the cam pivot axis (H).
EP99101984A 1998-02-02 1999-02-01 Electric safety switch Expired - Lifetime EP0933794B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVI980017 1998-02-02
IT98VI000017A ITVI980017A1 (en) 1998-02-02 1998-02-02 ELECTRIC SAFETY SWITCH

Publications (3)

Publication Number Publication Date
EP0933794A2 EP0933794A2 (en) 1999-08-04
EP0933794A3 true EP0933794A3 (en) 2000-01-12
EP0933794B1 EP0933794B1 (en) 2001-09-19

Family

ID=11426564

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99101984A Expired - Lifetime EP0933794B1 (en) 1998-02-02 1999-02-01 Electric safety switch

Country Status (3)

Country Link
EP (1) EP0933794B1 (en)
DE (1) DE69900290T2 (en)
IT (1) ITVI980017A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2817653B1 (en) * 2000-12-05 2003-02-21 Crouzet Automatismes KEY POSITION SWITCH
GB2489525A (en) * 2011-04-01 2012-10-03 Idem Safety Switches Ltd Safety switch anti-tamper cam system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3943376C1 (en) * 1989-12-30 1991-06-20 Kloeckner-Moeller Gmbh, 5300 Bonn, De
DE4338910C1 (en) * 1993-11-15 1995-02-16 Bernstein Hans Spezialfabrik Safety switch
EP0707329A1 (en) * 1994-10-13 1996-04-17 HANS BERNSTEIN SPEZIALFABRIK FÜR SCHALTKONTAKTE GmbH & CO. Safety switch
EP0727797A1 (en) * 1995-02-14 1996-08-21 K.A. SCHMERSAL GmbH & Co. Safety switch
EP0778595A1 (en) * 1995-12-05 1997-06-11 Schneider Electric Sa Safety switch with key

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3943376C1 (en) * 1989-12-30 1991-06-20 Kloeckner-Moeller Gmbh, 5300 Bonn, De
DE4338910C1 (en) * 1993-11-15 1995-02-16 Bernstein Hans Spezialfabrik Safety switch
EP0707329A1 (en) * 1994-10-13 1996-04-17 HANS BERNSTEIN SPEZIALFABRIK FÜR SCHALTKONTAKTE GmbH & CO. Safety switch
EP0727797A1 (en) * 1995-02-14 1996-08-21 K.A. SCHMERSAL GmbH & Co. Safety switch
EP0778595A1 (en) * 1995-12-05 1997-06-11 Schneider Electric Sa Safety switch with key

Also Published As

Publication number Publication date
EP0933794A2 (en) 1999-08-04
ITVI980017A0 (en) 1998-02-02
ITVI980017A1 (en) 1999-08-02
EP0933794B1 (en) 2001-09-19
DE69900290D1 (en) 2001-10-25
DE69900290T2 (en) 2002-09-26

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