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GB996882A - Improvements relating to apparatus comprising electric heating elements and thermal protective switches therefor - Google Patents

Improvements relating to apparatus comprising electric heating elements and thermal protective switches therefor

Info

Publication number
GB996882A
GB996882A GB569/62A GB56962A GB996882A GB 996882 A GB996882 A GB 996882A GB 569/62 A GB569/62 A GB 569/62A GB 56962 A GB56962 A GB 56962A GB 996882 A GB996882 A GB 996882A
Authority
GB
United Kingdom
Prior art keywords
bimetals
electric heating
bimetal
heating elements
improvements relating
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
GB569/62A
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.)
Firth Cleveland Ltd
Original Assignee
Firth Cleveland 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 Firth Cleveland Ltd filed Critical Firth Cleveland Ltd
Publication of GB996882A publication Critical patent/GB996882A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/16—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor the conductor being mounted on an insulating base
    • 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

Landscapes

  • Thermally Actuated Switches (AREA)
  • Fuses (AREA)

Abstract

996,882. Thermal switches. FIRTH CLEVELAND Ltd. Jan. 5, 1962 [Jan. 17, 1961], No. 569/62. Heading H2B. An electric heating element 24 is protected against overheating by a pair of bimetal switches connected in series with each other and with the heater 24, the bimetals lying within the area covered by the heater. The two bimetals 27a, 27b are formed from the ends of a single strip fixed at its centre 29 and bent over at its ends 31a, 31b to latch a pair of spring contact blades 32a, 32b in the closed position. The bimetals are insulated from blades 32a, 32b or they may be separately formed. In a second embodiment (Fig. 3) U-shaped spring contact blades 50 are latched closed by the edges of two separate bimetals 45. A blade 57 applies an adjustable spring bias to the bimetal 45. In a third embodiment (Fig. 6) the bimetal members 68 carry the contacts 77 which are of the selfresetting type.
GB569/62A 1961-01-07 1962-01-05 Improvements relating to apparatus comprising electric heating elements and thermal protective switches therefor Expired GB996882A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL0037891 1961-01-07

Publications (1)

Publication Number Publication Date
GB996882A true GB996882A (en) 1965-06-30

Family

ID=7268086

Family Applications (1)

Application Number Title Priority Date Filing Date
GB569/62A Expired GB996882A (en) 1961-01-07 1962-01-05 Improvements relating to apparatus comprising electric heating elements and thermal protective switches therefor

Country Status (3)

Country Link
US (1) US3229064A (en)
DE (1) DE1413910A1 (en)
GB (1) GB996882A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2211833A1 (en) * 1972-12-23 1974-07-19 Eichenauer Fa Fritz
DE19510300C1 (en) * 1995-03-22 1996-07-04 Tuerk & Hillinger Gmbh Electric heating element for gas flow

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3863185A (en) * 1973-12-17 1975-01-28 Robertshaw Controls Co Thermal beam actuated electrical sequencer
AT386489B (en) * 1984-06-15 1988-08-25 Electrovac THERMAL SWITCH WITH A TEMPERATURE SENSOR MADE FROM A THERMAL BIMETALLIC SNAP DISC
DE102007003906A1 (en) 2007-01-19 2008-07-24 Dbk David + Baader Gmbh Heating coil arrangement for heating by-passing gas substances

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US831847A (en) * 1904-12-31 1906-09-25 Automatic Electric Co Electrothermal switch.
US1328477A (en) * 1915-03-29 1920-01-20 Kenneth W Crosby Time-retarded cut-off switch
US1485580A (en) * 1919-11-17 1924-03-04 Jefferson Electric Mfg Company Thermostatic circuit breaker
US1550641A (en) * 1924-04-25 1925-08-18 Monitor Controller Co Resistance unit
US2016244A (en) * 1925-10-27 1935-10-01 Spencer Thermostat Co Thermostat
US1678401A (en) * 1925-12-24 1928-07-24 Nicholas J Luttrell Electrothermostatic switch
US1948938A (en) * 1933-02-01 1934-02-27 Williams Oil O Matic Heating Electric switch
GB418810A (en) * 1934-05-30 1934-10-31 Wolf Otto Improvements in thermally-controlled electric short-time switches
US2414531A (en) * 1940-05-31 1947-01-21 Westinghouse Electric Corp Multiple heater thermal switch
US2528591A (en) * 1946-01-11 1950-11-07 Trumbull Electric Mfg Co Electric relay
US2478541A (en) * 1948-01-15 1949-08-09 Claude F Mccracken Thermostatically operated circuit cutout

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2211833A1 (en) * 1972-12-23 1974-07-19 Eichenauer Fa Fritz
DE19510300C1 (en) * 1995-03-22 1996-07-04 Tuerk & Hillinger Gmbh Electric heating element for gas flow

Also Published As

Publication number Publication date
DE1413910A1 (en) 1969-10-09
US3229064A (en) 1966-01-11

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