Thermally-actuated switches

HELECTRICITY H01Electric elements H01HELECTRIC SWITCHES RELAYS SELECTORS EMERGENCY PROTECTIVE DEVICES

H01H37/00Thermally-actuated switches

H01H37/002combined with protective means H01H37/004with thermal image H01H37/006with different switches operated at substantially different temperatures H01H37/02Details H01H37/04Bases Housings Mountings H01H37/043Mountings on controlled apparatus H01H37/06to facilitate replacement H01H37/08Indicators Distinguishing marks H01H37/10Compensation for variation of ambient temperature or pressure H01H37/12Means for adjustment of "ON" or "OFF" operating temperature H01H37/14by anticipatory electric heater H01H37/16by varying the proportion of input heat received by the thermal element H01H37/18by varying bias on the thermal element due to a separate spring H01H37/20by varying the position of the thermal element in relation to switch base or casing H01H37/22by adjustment of a member transmitting motion from the thermal element to contacts or latch H01H37/24by adjustment of position of the movable contact on its driving member H01H37/26by adjustment of abutment for "OFF" position of the movable contact H01H37/28by adjustment of the position of the fixed contact H01H37/30by varying the position of the contact unit in relation to switch base or casing H01H37/32Thermally-sensitive members H01H37/323making use of shape memory materials H01H37/34Means for transmitting heat thereto H01H37/36actuated due to expansion or contraction of a fluid with or without vaporisation H01H37/38with bellows H01H37/40with diaphragm H01H37/42with curled flexible tube H01H37/44with piston and cylinder H01H37/46actuated due to expansion or contraction of a solid H01H37/48with extensible rigid rods or tubes H01H37/50with extensible wires under tension H01H37/52actuated due to deflection of bimetallic element H01H37/521comprising a plurality of bimetals acting in the same direction H01H37/54wherein the bimetallic element is inherently snap acting H01H37/5409Bistable switches; Resetting means H01H37/5418using cantilevered bimetallic snap elements H01H37/5427encapsulated in sealed miniaturised housing H01H37/5436mounted on controlled apparatus H01H37/56having spirally wound or helically wound bimetallic element H01H37/58actuated due to thermally controlled change of magnetic permeability H01H37/585the switch being of the reed switch type H01H37/60Means for producing snap action H01H37/62Means other than thermal means for introducing a predetermined time delay H01H37/64Contacts H01H37/66Magnetic reinforcement of contact pressure Magnet causing snap action H01H37/68sealed in evacuated or gas-filled tube H01H37/70Resetting means H01H37/72Switches in which the opening movement and the closing movement of a contact are effected respectively by heating and cooling or vice versa H01H37/74Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling H01H37/76Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material H01H37/761with a fusible element forming part of the switched circuit H01H37/764in which contacts are held closed by a thermal pellet H01H37/765using a sliding contact between a metallic cylindrical housing and a central electrode H01H37/766using a bridging contact H01H37/767Normally open