GB799971A - Thermostatic electric switch - Google Patents

Thermostatic electric switch

Info

Publication number
GB799971A
GB799971A GB2414356A GB2414356A GB799971A GB 799971 A GB799971 A GB 799971A GB 2414356 A GB2414356 A GB 2414356A GB 2414356 A GB2414356 A GB 2414356A GB 799971 A GB799971 A GB 799971A
Authority
GB
United Kingdom
Prior art keywords
contact
operating temperature
rod
thermostat
pivoted
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
GB2414356A
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.)
Kidde Inc
Original Assignee
Walter Kidde and Co Inc
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 US403165A priority Critical patent/US2777919A/en
Application filed by Walter Kidde and Co Inc filed Critical Walter Kidde and Co Inc
Priority to GB2414356A priority patent/GB799971A/en
Publication of GB799971A publication Critical patent/GB799971A/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
    • H01H37/32—Thermally-sensitive members
    • H01H37/46—Thermally-sensitive members actuated due to expansion or contraction of a solid
    • H01H37/48—Thermally-sensitive members actuated due to expansion or contraction of a solid with extensible rigid rods or tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/12—Means for adjustment of "on" or "off" operating temperature
    • H01H37/14—Means for adjustment of "on" or "off" operating temperature by anticipatory electric heater
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/225—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member the supporting member being pivotable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H2001/223—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member using a torsion spring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/12—Means for adjustment of "on" or "off" operating temperature
    • H01H37/28—Means for adjustment of "on" or "off" operating temperature by adjustment of the position of the fixed contact

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)

Abstract

799,971. Thermal switches. TRIGGS, W. W. (Kidde & Co., Inc., W.). Aug. 7, 1956, No. 24143/56. Class 38 (5). In a thermostatic switch that is sensitive to small departures from a normal high operating temperature (for example, 1000‹ F.) of the apparatus controlled, means are provided for preheating the thermostat to or near its operating temperature so that it may be ready for instant operation, if necessary. As shown, the expansible tube 14 of a differentiallyexpanding rod-and-tick thermostat has a heating coil 100, the ends 102, 104 of which are led out through hollow binding posts. The rod 20 is of ceramic or other very low expansion material and co-operates with an L-shaped member 50 pivoted on a pin 48 between lugs 42, 44 of the casing and biased clockwise (Fig. 1) by a wire spring 52. A movable contact 64 is pivoted on a pin 62 in a slot in member 50 and biased anticlockwise by a wire spring 68. At normal operating temperature, contact 64 lies out of contact with fixed contacts 82, 84, but at lower temperatures the rod 28 moves upwards and rotates member 50 so that contact 64 engages contact 82 and causes the heater 100 to be energized. At higher temperatures, the rod descends and spring 52 rotates member 50 so that contact 64 engages contact 84 to sound an alarm or disconnect the plant. As applied to a jet engine where the operating temperature is reached soon after starting up, the coil 100 is switched in in advance in case of malefunctioning of the engine.
GB2414356A 1954-01-11 1956-08-07 Thermostatic electric switch Expired GB799971A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US403165A US2777919A (en) 1954-01-11 1954-01-11 Thermostatic switch
GB2414356A GB799971A (en) 1956-08-07 1956-08-07 Thermostatic electric switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2414356A GB799971A (en) 1956-08-07 1956-08-07 Thermostatic electric switch

Publications (1)

Publication Number Publication Date
GB799971A true GB799971A (en) 1958-08-13

Family

ID=10207075

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2414356A Expired GB799971A (en) 1954-01-11 1956-08-07 Thermostatic electric switch

Country Status (1)

Country Link
GB (1) GB799971A (en)

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