Reed switch mechanism making use of heat-sensitive ferrite

Claim 2

The reed switch mechanism making use of heat-sensitive ferrites aS claimed in claim 1, wherein between magnetic poles of permanent magnets opposite to magnetic poles to which the heat sensitive ferrite is mounted, a heat sensitive ferrite, having a curie point in an expected temperature range to which said reed switch mechanism will be exposed and different in value from that of the other heat sensitive ferrite is mounted.

Claim 3

The reed switch mechanism making use of heat sensitive ferrites as claimed in claim 1, wherein an adjustable means, for setting a predetermined temperature for a switching operation of the reed switch body different from that of the curie point of said heat sensitive ferrite, is provided between magnetic poles of said permanent magnets opposite to the magnetic poles to which heat sensitive ferrite is mounted.

Claim 4

A temperature responsive magnetic bridge comprising: two permanent magnets being parallel and spaced, and their pole polarities inverted; a reed switch, having its longitudinal axis perpendicular to said magnets, connecting said magnets at their centers; at least one heat-sensitive ferrite mounted, substantially parallel to said longitudinal axis, between opposite poles of said permanet magnet; said reed switch assuming a first state at a temperature below a curie point of said heat-sensitive ferrite and a second state at a temperature above said curie point.

Claim 5

A temperature responsive magnetic bridge as in claim 5 including a second heat-sensitive ferrite having a curie point different from that of the other heat-sensitive ferrite mounted to remaining pair of opposite poles; said reed switch assuming a first state at temperatures between said two curie points and a second state for all other temperatures.

Claim 6

A temperature responsive magnetic bridge as in claim 5 including a permeable body adjustably mounted substantially parallel to said longitudinal axis and spaced from remaining pair of opposite poles; said reed switch changes states at a temperature which is other than said heat-sensitive ferrite''s curie point and is determined by said spacing.

Claim 7

A temperature responsive magnetic bridge as in claim 5 including a permeable body, having a curie point substantially higher than said ferrite''s curie point, mounted to the remaining pair of opposite poles so that said reed switch assuming said first state at a temperature above said ferrite''s curie point and said second state at a temperature below said ferrite''s curie point.