GB741384A - Improvements in or relating to electro-thermal actuating devices - Google Patents

Improvements in or relating to electro-thermal actuating devices

Info

Publication number
GB741384A
GB741384A GB1133853A GB1133853A GB741384A GB 741384 A GB741384 A GB 741384A GB 1133853 A GB1133853 A GB 1133853A GB 1133853 A GB1133853 A GB 1133853A GB 741384 A GB741384 A GB 741384A
Authority
GB
United Kingdom
Prior art keywords
layer
strip
heating element
april
paper
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
GB1133853A
Inventor
Harry Norman Green
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB1133853A priority Critical patent/GB741384A/en
Publication of GB741384A publication Critical patent/GB741384A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H61/00—Electrothermal relays
    • H01H61/02—Electrothermal relays wherein the thermally-sensitive member is heated indirectly, e.g. resistively, inductively

Landscapes

  • Laminated Bodies (AREA)

Abstract

741,384. Thermal switches. NATIONAL RESEARCH DEVELOPMENT CORPORATION. April 26, 1954 [April 24, 1953], No. 11338/53. Class 38(5) [Also in Group XIIII Due to an electric heating element 15 at one side, a metal or other heat-expansible strip expands at that side first and is bowed until the temperature gradient, from the one side to the other, diminishes. To prolong the period of bowing the strip may have a high conductivity layer backed at the side remote from the heating element 15 by a low conductivity layer. As shown, such a layer, 13, e.g. of paper or adhesive, is sandwiched between two high conductivity layers 11, 12. The heating element is stuck to the strip and may be a zig-zag wire or printed circuit 15 on a paper, &c. backing 14, e.g.. it may be a strain gauge. As the layer 11 is heated more rapidly than layer 12, the strip bows so that contacts 19 are joined until the layer 12 heats up and the strip straightens again. A number of the switches may be connected in series to close a chain of circuits in rapid succession.
GB1133853A 1953-04-24 1953-04-24 Improvements in or relating to electro-thermal actuating devices Expired GB741384A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1133853A GB741384A (en) 1953-04-24 1953-04-24 Improvements in or relating to electro-thermal actuating devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1133853A GB741384A (en) 1953-04-24 1953-04-24 Improvements in or relating to electro-thermal actuating devices

Publications (1)

Publication Number Publication Date
GB741384A true GB741384A (en) 1955-11-30

Family

ID=9984424

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1133853A Expired GB741384A (en) 1953-04-24 1953-04-24 Improvements in or relating to electro-thermal actuating devices

Country Status (1)

Country Link
GB (1) GB741384A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3846726A (en) * 1973-03-15 1974-11-05 Emerson Electric Co Bimetal actuator with electrical resistance heater
FR2231076A2 (en) * 1973-05-24 1974-12-20 Electricite De France Driving organ operated by thermal means - esp. for use in corrosive or dangerous environments formed by two metal strips
US4174511A (en) * 1977-03-24 1979-11-13 Robert Bosch Gmbh Bimetal device with an electrical heating element

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3846726A (en) * 1973-03-15 1974-11-05 Emerson Electric Co Bimetal actuator with electrical resistance heater
FR2231076A2 (en) * 1973-05-24 1974-12-20 Electricite De France Driving organ operated by thermal means - esp. for use in corrosive or dangerous environments formed by two metal strips
US4174511A (en) * 1977-03-24 1979-11-13 Robert Bosch Gmbh Bimetal device with an electrical heating element

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