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GB632904A - Improvements in electric thermostats - Google Patents

Improvements in electric thermostats

Info

Publication number
GB632904A
GB632904A GB32489/47A GB3248947A GB632904A GB 632904 A GB632904 A GB 632904A GB 32489/47 A GB32489/47 A GB 32489/47A GB 3248947 A GB3248947 A GB 3248947A GB 632904 A GB632904 A GB 632904A
Authority
GB
United Kingdom
Prior art keywords
magnet
lever
armature
contact
plate
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
GB32489/47A
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.)
Individual
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
Priority to BE486196D priority Critical patent/BE486196A/fr
Application filed by Individual filed Critical Individual
Priority to GB32489/47A priority patent/GB632904A/en
Priority to CH271496D priority patent/CH271496A/en
Priority to FR976366D priority patent/FR976366A/en
Priority to US64326A priority patent/US2519558A/en
Publication of GB632904A publication Critical patent/GB632904A/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
    • H01H37/02—Details
    • H01H37/64—Contacts
    • H01H37/66—Magnetic reinforcement of contact pressure; Magnet causing snap action
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/02—Energy stored by the attraction or repulsion of magnetic parts

Landscapes

  • Thermally Actuated Switches (AREA)

Abstract

632,904. Thermal switches. FLIGHT, T. N., WILSON, W. H., and CHINN, A. J. Dec. 9, 1947, No. 32489. [Class 38 (v)] A thermostat embodying the switch disclosed in Specification 625,492 comprises an expansible brass tube 2 into which is screwed a nickel iron rod 3 adjustable by a knob 18 and having a collar 19 engaging points B,B<SP>1</SP> at the bottom of a recess in an insulating member 16. Clamped on posts 4,4<SP>1</SP> and separated by washers 5, 9 are a plate 6 supporting a magnet 11, a resilient lever 7 carrying a contact 14 and a twin armature unit 12, 13 and a fixed-contact carrying plate 8. The lever 7 is biassed to the closed position by arranging the armature 13 nearer to the magnet 11 than armature 12. On increase of temperature, the collar 19 moves down, causing the member 16 to pivot on the plate 8 about the point 20, whereby a pip 17 on the member 16 presses on the lever 7 and contacts 14, 15 separate with a snap-action. On cooling, the pressure on the lever 7 is relieved until its tension is overcome by the magnet and armature 13 and the contacts reclose. The position of the armatures 12, 13 relative to the magnet 11 is adjustable by the contact 15, and a screw 21 controls the contact gap.
GB32489/47A 1947-12-09 1947-12-09 Improvements in electric thermostats Expired GB632904A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE486196D BE486196A (en) 1947-12-09
GB32489/47A GB632904A (en) 1947-12-09 1947-12-09 Improvements in electric thermostats
CH271496D CH271496A (en) 1947-12-09 1948-12-06 Thermostat with magnetic snap switch.
FR976366D FR976366A (en) 1947-12-09 1948-12-09 Advanced thermostat
US64326A US2519558A (en) 1947-12-09 1948-12-09 Thermostatic switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB32489/47A GB632904A (en) 1947-12-09 1947-12-09 Improvements in electric thermostats

Publications (1)

Publication Number Publication Date
GB632904A true GB632904A (en) 1949-12-05

Family

ID=10339374

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32489/47A Expired GB632904A (en) 1947-12-09 1947-12-09 Improvements in electric thermostats

Country Status (5)

Country Link
US (1) US2519558A (en)
BE (1) BE486196A (en)
CH (1) CH271496A (en)
FR (1) FR976366A (en)
GB (1) GB632904A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB687258A (en) * 1951-10-18 1953-02-11 Rheostatic Co Ltd Improvements in safety switches for electrically heated appliances
GB882876A (en) * 1959-03-02 1961-11-22 Rheostatic Co Ltd Improvements in temperature responsive magnetic snap-action switches
GB889634A (en) * 1959-03-02 1962-02-21 Rheostatic Co Ltd Improvements in magnetic snap action electric switches
DE1195852B (en) * 1960-12-09 1965-07-01 Christian Buerkert Temperature limiter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB437826A (en) * 1934-05-26 1935-11-06 Harold Curtice Sanders Improvements in thermally-operated electric switches
US2180018A (en) * 1936-05-14 1939-11-14 Automatic Control Corp Diaphragm-actuated transmission means
BE439845A (en) * 1936-07-31

Also Published As

Publication number Publication date
CH271496A (en) 1950-10-31
FR976366A (en) 1951-03-16
BE486196A (en)
US2519558A (en) 1950-08-22

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