GB1371123A - Electric switches - Google Patents

Electric switches

Info

Publication number
GB1371123A
GB1371123A GB3011672A GB3011672A GB1371123A GB 1371123 A GB1371123 A GB 1371123A GB 3011672 A GB3011672 A GB 3011672A GB 3011672 A GB3011672 A GB 3011672A GB 1371123 A GB1371123 A GB 1371123A
Authority
GB
United Kingdom
Prior art keywords
length
plug
casing
reduced
end portion
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
GB3011672A
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.)
MICRO DEVICES CORP
Original Assignee
MICRO DEVICES CORP
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 MICRO DEVICES CORP filed Critical MICRO DEVICES CORP
Publication of GB1371123A publication Critical patent/GB1371123A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/764—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material in which contacts are held closed by a thermal pellet
    • H01H37/765—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material in which contacts are held closed by a thermal pellet using a sliding contact between a metallic cylindrical housing and a central electrode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/76—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein arc-extinguishing gas is evolved from stationary parts; Selection of material therefor

Abstract

1371123 Thermal switches MICRO DEVICES CORP 27 June 1972 [16 July 1971] 30116/72 Heading H1N A thermal cut-out is identical to the one described with reference to Figs. 1-5 of U.K. Specification 1,255,589, except that the identical reduced diameter end portions 36, 38 of the insulating plug 16 closing one end of the conductive casing 12 are at least as long as the enlarged diameter central portion 32. Because the plug 16 is symmetrical about a central axis transverse to its length probelms of incorrect orientation of the plug do not arise when it is automatically assembled in the casing 12. The greater axial length of end portion 36 ensures that the length of plug insulation between the casing end flange 44 and the exposed outer end of conductor 20 is greater than in U.K. Specification 1,255,589. As the overall length of the plug 16 is the same as that of the aforementioned U.K. Specification the length of the central portion 32 is reduced and hence the length of the counterbore 34 in casing 12 is reduced. Each end portion 36, 38 has two frusto-conical parts 35, 37 between which an annular seat 139 for biasing spring 54 is formed. In Figs. 8 and 9 (not shown) each end portion 36, 38 has a single smooth frustoconical surface.
GB3011672A 1971-07-16 1972-06-27 Electric switches Expired GB1371123A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US16317071A 1971-07-16 1971-07-16
US403539A US3875546A (en) 1971-07-16 1973-10-04 Electrical switch construction and end plug therefor or the like

Publications (1)

Publication Number Publication Date
GB1371123A true GB1371123A (en) 1974-10-23

Family

ID=26859405

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3011672A Expired GB1371123A (en) 1971-07-16 1972-06-27 Electric switches

Country Status (5)

Country Link
US (2) US3778742A (en)
CA (1) CA960731A (en)
DE (1) DE2233792A1 (en)
GB (1) GB1371123A (en)
NL (1) NL7209079A (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3778742A (en) * 1971-07-16 1973-12-11 Micro Devices Corp Electrical switch construction and end plug therefor or the like
DE2424385B2 (en) * 1974-05-20 1976-07-08 OVERHEATING PROTECTION FOR ELECTRIC CIGAR LIGHTER
US3992771A (en) * 1974-05-22 1976-11-23 Emerson Electric Co. Method of making thermal limiter construction
US4068204A (en) * 1975-12-26 1978-01-10 New Nippon Electric Company, Ltd. Thermal fuse employing a slidable resilient contact member in a conductive housing
US4197634A (en) * 1976-08-23 1980-04-15 Emerson Electric Co. Method of making a thermally actuatable electrical switch construction
IT1192642B (en) * 1978-03-28 1988-04-27 Littelfuse Inc FUSE, OR SWITCH, ENABLED BY ENVIRONMENTAL HEAT AND MANUFACTURING METHOD
US4276532A (en) * 1978-07-08 1981-06-30 Murata Manufacturing Co., Ltd. Thermal fuse
US4362388A (en) * 1980-11-17 1982-12-07 Bethlehem Steel Corp. Remote measurement of concentration of a gas specie by resonance absorption
JP4583228B2 (en) * 2005-04-18 2010-11-17 エヌイーシー ショット コンポーネンツ株式会社 Thermal pellet type thermal fuse
US7843307B2 (en) * 2007-10-05 2010-11-30 Nec Schott Components Corporation Thermal fuse employing thermosensitive pellet
US8070503B2 (en) * 2009-05-26 2011-12-06 Spin Master Ltd. Charging interface for rechargeable devices
GB2471869B (en) * 2009-07-15 2012-04-25 Vishay Resistors Belgium Bvba Thermal switch

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3778742A (en) * 1971-07-16 1973-12-11 Micro Devices Corp Electrical switch construction and end plug therefor or the like

Also Published As

Publication number Publication date
US3778742A (en) 1973-12-11
DE2233792A1 (en) 1973-01-25
NL7209079A (en) 1973-01-18
US3875546A (en) 1975-04-01
CA960731A (en) 1975-01-07

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees