GB585590A - Improvements in or relating to electric snap action switches - Google Patents

Improvements in or relating to electric snap action switches

Info

Publication number
GB585590A
GB585590A GB8351/44A GB835144A GB585590A GB 585590 A GB585590 A GB 585590A GB 8351/44 A GB8351/44 A GB 8351/44A GB 835144 A GB835144 A GB 835144A GB 585590 A GB585590 A GB 585590A
Authority
GB
United Kingdom
Prior art keywords
strip
spring
blade
tension
switches
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
GB8351/44A
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.)
SIDNEY ARTHUR SINGLETON
THERMEGA Ltd
Original Assignee
SIDNEY ARTHUR SINGLETON
THERMEGA Ltd
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 SIDNEY ARTHUR SINGLETON, THERMEGA Ltd filed Critical SIDNEY ARTHUR SINGLETON
Publication of GB585590A publication Critical patent/GB585590A/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
    • H01H37/60—Means for producing snap action
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18856—Oscillating to oscillating
    • Y10T74/18864—Snap action
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18856—Oscillating to oscillating
    • Y10T74/18864—Snap action
    • Y10T74/18872—Plate spring

Landscapes

  • Thermally Actuated Switches (AREA)

Abstract

585,590. Snap-action switches; thermal switches; press-button switches. THERMEGA, Ltd., and SINGLETON, S. A. May 3, 1944, No. 8351. [Class 38 (v)] A snap-action switch comprises a blade spring 5 fixed at one end in an insulating block 4 and carrying at the other end a movable contact 6 co-operating with a fixed contact 2 on a rigid strip 1, which also carries a tension or adjustment screw 7 pressing on the blade 5 through an insulating plate 8. A transversely-curved strip 10, fixed at 9 to the blade spring, is pressed by an adjusting screw 11 which in Fig. 1 is mounted on a bimetallic strip 3 and insulated from the strip 10 by a button 12, against the dimple 13 of the blade spring thus bending it to bring the contacts together. A rise in temperature causes the bimetallic strip to move inwards, thus increasing the curvature of blade 5 until at a preset temperature the spring 10 suddenly collapses about the fulcrum 13 and allows the spring blade 5 to straighten, thus opening the contacts. On cooling, a snap closure is obtained when the strip 10 suddenly straightens, a hook 16 restraining its subsequent opening motion at very low temperatures. The tension and adjusting screws may be interchanged, and greater sensitivity may be obtained by replacing the rigid strip 1 by another bimetallic strip. The block 4 may carry spring lugs 24 to locate the thermostat inside a glass vessel. In a further modification. Fig. 6 (not shown), the bimetallic strip is replaced by a leaf spring or rigid holder carrying a slidable insulating push button. Alternatively the push button and tension screw 7 may be interchanged to produce a switch requiring a heavy pressure but small movement to operate it.
GB8351/44A 1944-05-03 1944-05-03 Improvements in or relating to electric snap action switches Expired GB585590A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB256664X 1944-05-03

Publications (1)

Publication Number Publication Date
GB585590A true GB585590A (en) 1947-02-12

Family

ID=10231351

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8351/44A Expired GB585590A (en) 1944-05-03 1944-05-03 Improvements in or relating to electric snap action switches

Country Status (5)

Country Link
US (1) US2440025A (en)
BE (1) BE466196A (en)
CH (1) CH256664A (en)
FR (1) FR924992A (en)
GB (1) GB585590A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5014034A (en) * 1989-12-04 1991-05-07 Portage Electric Products, Inc. Thermostatic switch with insulated calibration dimple

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2616996A (en) * 1947-12-06 1952-11-04 Beeman Lyle Snap switch
US2721915A (en) * 1950-09-08 1955-10-25 Motor Wheel Corp Electric switch control
US2692317A (en) * 1951-01-23 1954-10-19 Stevens Mfg Co Inc Snap-acting thermostat
US2658972A (en) * 1951-05-23 1953-11-10 Burroughs Adding Machine Co Mechanical bi-stable device
US2749406A (en) * 1951-09-11 1956-06-05 Proctor Electric Co Thermal wattage controller
US2786928A (en) * 1952-07-28 1957-03-26 Gen Mills Inc Thermostatically controlled cooking appliance
US2717289A (en) * 1952-12-17 1955-09-06 Stevens Mfg Co Inc Wide range thermostat
US2720568A (en) * 1953-01-27 1955-10-11 Stevens Mfg Co Inc Snap-acting bimetallic thermostat
US2747054A (en) * 1953-12-17 1956-05-22 Valverde Robert Friction thermostat
US2813175A (en) * 1956-06-07 1957-11-12 Hering Walter Electrical snap switch
US4224593A (en) * 1978-12-21 1980-09-23 Eaton Corporation Double-motion thermostat
US4288686A (en) * 1979-12-17 1981-09-08 C. Cretors And Company Thermostat for popcorn cooking containers or the like

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2260083A (en) * 1939-06-23 1941-10-21 Edison General Elec Appliance Control device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5014034A (en) * 1989-12-04 1991-05-07 Portage Electric Products, Inc. Thermostatic switch with insulated calibration dimple

Also Published As

Publication number Publication date
BE466196A (en)
CH256664A (en) 1948-08-31
US2440025A (en) 1948-04-20
FR924992A (en) 1947-08-21

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