Abstract: A resettable thermal switch utilizing the principle that the permeability of a ferromagnetic material is sensitive to temperature variations in the vicinity of the Curie temperature. The resettable ferromagnetic thermal switch includes a resilient arm having a ferromagnetic aspect associated therewith (inherently or by attachment), an electrical contact including a stationary contact component and a movable contact component located at a distal location of the resilient arm, and a magnet located on one side of the resilient arm. The resilient arm has a predetermined inherent spring force urging the movable contact component toward or away from the stationary contact component depending on whether the electrical contact is to be spring biased closed or spring biased open, respectively. The magnet is located to provide a magnetic attraction force with the temperature dependent permeability of the ferromagnetic aspect in opposition to the inherent spring force.

Abstract: Methods and apparatuses for magnetically detecting a temperature change for thermostat control thereof are disclosed. A thermostat control device can be configured to include at least one bi-metallic strip that is configured to experience a change in angular position in response to a temperature change. The thermostat control device is generally associated with a Hall sensor, which includes a plurality of magnets that can experience movement relative to the Hall sensor in response to the change in the angular position of the bi-metallic strip. The temperature change can then be automatically and/or electrically detected in response to the movement of the magnets, wherein the temperature change is utilized for thermostat control thereof.

Abstract: Methods and apparatuses for magnetically detecting a temperature change for thermostat control thereof are disclosed. A thermostat control device can be configured to include at least one bi-metallic strip that is configured to experience a change in angular position in response to a temperature change. The thermostat control device is generally associated with a Hall sensor, which includes a plurality of magnets that can experience movement relative to the Hall sensor in response to the change in the angular position of the bi-metallic strip. The temperature change can then be automatically and/or electrically detected in response to the movement of the magnets, wherein the temperature change is utilized for thermostat control thereof.

Abstract: The invention relates to a reed contact unit (1) for electric switching functions, comprising a metallic contact blank (2) featuring a base (3) with at least one contact arm (5) configured integral with it, and comprising an electrically non-conducting frame part (7) accommodating fixedly the base (3) of the contact blank (2). To avoid deformations and damage to the contact arms (5) of the reed contact units (1) when used in bulk, at least one of the long sides (12) and the front end (9) of the contact arm (5) are surrounded by at least one frame shank (8) configured integral with the frame part (7), the front end (9) of the contact arms (5) being fixable releasably in the frame shank (8).

Abstract: A single pole double throw thermostatic switch has a pair of fixed contacts on opposite sides of a movable contact. A U-shaped bimetal member having a pair of spaced end portions has one end portion attached to a switchcase and the other end portion carries the movable contact.

Abstract: A device for the control of room temperature in existing automobiles is placed in series with the driving circuit of the blower motor of the automobile. The temperature control device includes a bimetal or spiral bimetallic strip capable of setting a working temperature. The bimetal is used for the direct detection of the room temperature of the automobile. An insulating member is attached to a free end of the bimetal. The insulating member carries a first electrical contact, and a mating contact opposes the first contact. Respective lead wires are attached to each contact. A switch lever rotates the bimetal to set a desired temperature. A stopper is provided to hold the contacts together so that, regardless of the ambient temperature, the blower motor remains on, and the user can rely solely on the existing controls.

Abstract: The disclosure relates to an over-temperature limit switch for automatically making or breaking an electrical circuit at a predetermined temperature. The actuating force for the switch is provided by a temperature dependent bimetallic spring and the latching function of the switch is provided by a pair of magnets. One of the magnets, a permanent magnet, is secured to the bimetallic spring and the other magnet, a non-permanent or "soft" magnet, is disposed in the base of the switch opposite the permanent magnet. The non-permanent magnet has a transition temperature associated therewith indicating the temperature above which the permeability of the magnet diminishes to such an extent that it can no longer carry sufficient magnetic lines of flux from the permanent magnet to hold it against the force of the bimetallic spring. The bimetallic spring is adapted to exert a bias force tending to open the switch at a temperature below the transition temperature of the non-permanent magnet.