GB1208268A - Improvements in or relating to heat responsive switch devices - Google Patents

Improvements in or relating to heat responsive switch devices

Info

Publication number
GB1208268A
GB1208268A GB5418367A GB5418367A GB1208268A GB 1208268 A GB1208268 A GB 1208268A GB 5418367 A GB5418367 A GB 5418367A GB 5418367 A GB5418367 A GB 5418367A GB 1208268 A GB1208268 A GB 1208268A
Authority
GB
United Kingdom
Prior art keywords
shapes
contacts
contact
dec
responsive switch
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
GB5418367A
Inventor
Robert Douglas Coombes
David Grant Eardley Beswick
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.)
Kenneth E Beswick Ltd
Original Assignee
Kenneth E Beswick 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 Kenneth E Beswick Ltd filed Critical Kenneth E Beswick Ltd
Publication of GB1208268A publication Critical patent/GB1208268A/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Thermally Actuated Switches (AREA)

Abstract

1,208,268. Thermal switches. KENNETH E. BESWICK Ltd. 15 Dec., 1967 [16 Dec., 1966; 28 Nov., 1967], Nos. 56500/66 and 54183/67. Heading H1N. [Also in Division G1] A heat-responsive switch for breaking an electric circuit, has two contacts 3, 4 biased to a normally open position held in closed position with an end of one contact turned over an end of the other contact by a member 5 made of such a material that, at a predetermined temperature it deforms or collapses to allow the contacts 3, 4 to assume their normally open positions. Member 5 is made of a thermoplastic material, e.g. polystyrene or low melting point alloys and waxes. Contacts 3, 4 may be made of hardened beryllium copper. Apertures 14, 15 in the casing allows air circulation through member 5. The upper part 1 of the housing may be made of transparent polycarbonate and the lower part 2 of coloured polycarbonate. The switch may make a secondary contact after opening. Member 5 may be of other shapes, preferably but not necessarily hollow, e.g. U-shapes or V-shapes.
GB5418367A 1966-12-16 1966-12-16 Improvements in or relating to heat responsive switch devices Expired GB1208268A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5650066 1966-12-16

Publications (1)

Publication Number Publication Date
GB1208268A true GB1208268A (en) 1970-10-14

Family

ID=10476777

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5418367A Expired GB1208268A (en) 1966-12-16 1966-12-16 Improvements in or relating to heat responsive switch devices

Country Status (1)

Country Link
GB (1) GB1208268A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2435121A1 (en) * 1978-08-30 1980-03-28 Beswick Kenneth E Ltd THERMAL CIRCUIT BREAKER AND METHOD FOR ASSEMBLING A SERIES OF SUCH CIRCUIT BREAKERS
NL8303800A (en) * 1982-11-11 1984-06-01 Soc Corp THERMAL CONNECTOR.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2435121A1 (en) * 1978-08-30 1980-03-28 Beswick Kenneth E Ltd THERMAL CIRCUIT BREAKER AND METHOD FOR ASSEMBLING A SERIES OF SUCH CIRCUIT BREAKERS
NL8303800A (en) * 1982-11-11 1984-06-01 Soc Corp THERMAL CONNECTOR.

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years