CA1019369A - Tamperproof lock switch - Google Patents

Tamperproof lock switch

Info

Publication number
CA1019369A
CA1019369A CA226,948A CA226948A CA1019369A CA 1019369 A CA1019369 A CA 1019369A CA 226948 A CA226948 A CA 226948A CA 1019369 A CA1019369 A CA 1019369A
Authority
CA
Canada
Prior art keywords
lock switch
tamperproof
tamperproof lock
switch
lock
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.)
Expired
Application number
CA226,948A
Other languages
French (fr)
Inventor
Ernest R. Carlson
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.)
Harvey Hubbell Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of CA1019369A publication Critical patent/CA1019369A/en
Expired 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/50—Special application
    • Y10T70/5611—For control and machine elements
    • Y10T70/569—Lever
    • Y10T70/573—Single
    • Y10T70/5735—Externally mounted locking device
    • Y10T70/5739—With padlock
CA226,948A 1974-08-02 1975-05-14 Tamperproof lock switch Expired CA1019369A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US49431974 US3906176A (en) 1974-08-02 1974-08-02 Tamperproof switch

Publications (1)

Publication Number Publication Date
CA1019369A true CA1019369A (en) 1977-10-18

Family

ID=23963987

Family Applications (1)

Application Number Title Priority Date Filing Date
CA226,948A Expired CA1019369A (en) 1974-08-02 1975-05-14 Tamperproof lock switch

Country Status (2)

Country Link
US (1) US3906176A (en)
CA (1) CA1019369A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9607182B1 (en) 2016-02-02 2017-03-28 International Business Machines Corporation Universal emergency power-off switch security device

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4013858A (en) * 1975-07-02 1977-03-22 Cutler-Hammer, Inc. Rocker switch with integral off lock
USRE30273E (en) * 1975-07-02 1980-05-13 Eaton Corporation Rocker switch with integral off lock
US4174472A (en) * 1978-10-26 1979-11-13 Cutler-Hammer, Inc. Pivoted-actuator switch with integral off-lock
US4230917A (en) * 1979-02-12 1980-10-28 Mcgill Manufacturing Company, Inc. Removable-key rocker type switch for two circuits
US4440994A (en) * 1982-08-20 1984-04-03 Eaton Corporation Pivoted actuator off lock switch with operator key nonremovable in ON position
US4767895A (en) * 1987-10-27 1988-08-30 Eaton Corporation Removable key off-lock switch having improved locking actuator
US6573465B1 (en) * 2002-01-29 2003-06-03 Connector Set Limited Partnership Contact switch
US6630635B1 (en) * 2002-01-29 2003-10-07 Connector Set Limited Partnership Universal contact switch
CA2506878C (en) * 2004-05-10 2011-11-22 Gary Anderson Pneumatic tool lock
US7750509B2 (en) * 2004-05-10 2010-07-06 Gary Anderson Power tool lockdown device
CA2506876C (en) * 2004-05-10 2012-11-20 Gary Anderson Power tool lockdown device
US7196278B2 (en) * 2005-03-03 2007-03-27 Leviton Manufacturing Co., Inc. Key operated security switch
US7939771B2 (en) * 2009-05-21 2011-05-10 Leao Wang Lever switch for safe breaking of a circuit of an exercise apparatus
JP2014229475A (en) * 2013-05-22 2014-12-08 オムロン株式会社 Switch, and method of controlling the same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3632914A (en) * 1970-12-28 1972-01-04 Mc Gill Mfg Co Key-operated electrical switch
US3678229A (en) * 1971-10-13 1972-07-18 Mc Gill Mfg Co Spring mounted key for electrical switch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9607182B1 (en) 2016-02-02 2017-03-28 International Business Machines Corporation Universal emergency power-off switch security device
US9665741B1 (en) 2016-02-02 2017-05-30 International Business Machines Corporation Universal emergency power-off switch security device

Also Published As

Publication number Publication date
US3906176A (en) 1975-09-16

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