GB1502983A - Fire-resistant electrical connection device - Google Patents

Fire-resistant electrical connection device

Info

Publication number
GB1502983A
GB1502983A GB899075A GB899075A GB1502983A GB 1502983 A GB1502983 A GB 1502983A GB 899075 A GB899075 A GB 899075A GB 899075 A GB899075 A GB 899075A GB 1502983 A GB1502983 A GB 1502983A
Authority
GB
United Kingdom
Prior art keywords
contact
plate
rod
switch
fire
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
GB899075A
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.)
Cables de Lyon SA
Original Assignee
Cables de Lyon SA
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 Cables de Lyon SA filed Critical Cables de Lyon SA
Publication of GB1502983A publication Critical patent/GB1502983A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/08—Distribution boxes; Connection or junction boxes
    • H02G3/16—Distribution boxes; Connection or junction boxes structurally associated with support for line-connecting terminals within the box
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/0241—Structural association of a fuse and another component or apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Fuses (AREA)

Abstract

1502983 Thermal switches LES CABLES DE LYON 4 March 1975 [8 March 1974] 8990/75 Heading H1N [Also in Division H2] A fire resistant electrical convection device comprises an insulating refractory box 28 containing a thermally responsive switch 29 and a fusible link 15 connected in series between two terminals 4, 9, the switch 29 comprising a movable contact 13 held in a contact closed position by a control rod 16 and a manually movable plate 18 which comprises or carries a thermally deformable or fusible material which deforms or fuses, when heated to allow the switch 29 to open. In one embodiment, Fig. 1, the housing 28 comprises two parts 1, 2 of magnesium silicate or steatite held together by nuts and bolts (3). A movable contact 12 on a flexible member 13 is biased into engagement with the terminal 4 by a rod 16 received in a slot in a nylon plate 18 . When a fire occurs, the plate 18 is deformed by the heat allowing the rod 16 to be raised by the contact carrier 13 thereby opening the switch 29. A connector screw 25 for the fuse link 15 is accessible by rotating the plate 18 about a pin 19 which causes the plate 18 to disengage the rod 16 and the switch 29 to open. In another embodiment, Fig. 3, a plate 34 is connected to a flexible blade 36 mounting a contact 35. The contact 35 is engaged by a contact 37 mounted on a rod 16 engaging a low melting point alloy 38 in a cup 39. When the alloy 38 melts, the rod 16 is biased upwardly through the cup 39 by springs (51) (Fig. 6, not shown) causing the contact 37 to disengage the contact 35. The terminal 4 for clamping cable wires 30 comprises plates 31, 32 and screws 33 made of a material, e.g. molybdenum stainless steel, having a lower coefficient of expansion than the wires 30 and the plate 34 so that the clamping pressure of the plates 31, 32 will not be reduced on overheating.
GB899075A 1974-03-08 1975-03-04 Fire-resistant electrical connection device Expired GB1502983A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7408014A FR2263627B1 (en) 1974-03-08 1974-03-08

Publications (1)

Publication Number Publication Date
GB1502983A true GB1502983A (en) 1978-03-08

Family

ID=9136060

Family Applications (1)

Application Number Title Priority Date Filing Date
GB899075A Expired GB1502983A (en) 1974-03-08 1975-03-04 Fire-resistant electrical connection device

Country Status (3)

Country Link
DE (1) DE2509828C2 (en)
FR (1) FR2263627B1 (en)
GB (1) GB1502983A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2132021A (en) * 1982-11-11 1984-06-27 Soc Corp Thermal switch

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3539425A1 (en) * 1985-11-07 1987-05-14 Limitor Ag THERMOBI METAL SWITCH
DE102009029942A1 (en) * 2009-06-19 2010-12-30 Günther Spelsberg GmbH & Co. KG Fire protection clamp

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH182194A (en) * 1935-03-23 1936-01-31 Fr Ghielmetti & Cie A G Overtemperature protection device for electrically heated heating systems, in particular for heating systems controlled by thermostats.
DE914268C (en) * 1952-02-16 1954-06-28 Ludwig Carl Roof stand with house connection fuse
US3613040A (en) * 1970-02-09 1971-10-12 Vapor Corp High-voltage temperature switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2132021A (en) * 1982-11-11 1984-06-27 Soc Corp Thermal switch

Also Published As

Publication number Publication date
DE2509828A1 (en) 1975-09-11
DE2509828C2 (en) 1985-04-04
FR2263627A1 (en) 1975-10-03
FR2263627B1 (en) 1976-12-10

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee