Abstract: A thermally actuated device, such as an electrical circuit breaker (10) is provided with an ambient temperature compensation thermostat metal member (38) selected so that it bends when subjected to changes in temperature and compensates for ambient temperature effects on a thermostat metal trip arm for a selected current rating. Movement of such thermostat metal member is directly proportional to the flexivity of the material and to the square of the length of the member and indirectly proportional to the thickness of the member. Since packaging constraints make changes in length impractical, compensation members used to provide temperature compensation for different current ratings of the device typically have been made by using members of different thickness.

Abstract: A fuseless breaking switch comprises essentially a casing, an alloy blade, first, second, and the third conductive plate, a spring blade and an adjusting screw. The switching on (off) of the button allows a closed (open) circuit through the alloy blade and the conductive plates and an adjusting screw secured inside the casing will help ensure the sensitivity of dealing with different voltage loading through the adjusting to the curvature of the alloy blade by the adjusting screw.

Abstract: A thermally controlled electric switching arrangement with a temperature controller, having a snap-action switch actuated by a bimetallic strip and of which the dead center position is displaceable by a manually operable setting device in order to influence the control point, and with a temperature limiter which is constructed as a melting metal fuse which comprises a fusible element, pressure elements engaging therein and at least one switching contact held in the closed position by the pressure element, so long as the limiter has not responded, is structurally simplified, the simplification also being intended to improve the variability of installation of the switching arrangement. This is achieved in that the movable contact of the temperature limiter which is actuated by a thrust pin biases a first contact face of the fixed contact of the temperature limiter, which is opposite a second contact face of the fixed contact which is biased by the movable contact of the temperature controller.

Abstract: The disclosure relates to an electrical circuit breaker comprising a housing having a pair of external terminals for connection to a source of electrical current. Current responsive means is supported internally of the housing and electrically connected to said terminals and to separable internal contacts. Current flow through said current responsive means effects separation of said contacts upon the occurrence of a predetermined electrical condition. A fusible element disposed externally of said housing is electrically connected in series with said contacts and current responsive means and is operable to effect interruption of the electrical circuit through said circuit breaker upon failure of said current responsive means to respond to said predetermined electrical condition.

Abstract: A circuit breaker has contacts which are engageable as a result of manual operation of a toggle mechanism causing the circuit breaker to close and open when the toggle is in an erect and collapsed condition, respectively. Subsequent opening of the circuit breaker is accomplished by either manual operation or automatic due to a current responsive latch within the toggle mechanism. As a result of a unique movable contact biasing arrangement, more uniform pressure is obtained between the contacts and a wiping action of the contacts is obtained during closing. The movable contact is mounted on a contact member pivoted at its center on a solid pin mounted in the breaker case through an elongated aperture in the contact member. The elongated aperture allows for a limited degree of movement of the contact member transverse to the pivot pin. It is this limited transverse movement which increases the tolerance range by providing overtravel of the movable contact and wiping action of the contacts.

Abstract: An improved electrical circuit breaker which is so arranged that, by the deflection of a bimetal plate of approximately rectangular configuration having, at its opposite ends, electrical contacts contacting corresponding portions of terminal plates under a predetermined contact pressure, the engagement of the central portion of the bimetal plate and an engaging member is released so as to cause the bimetal plate to move in the direction normal to the direction of application of the contact pressure by spring force of a spring member through a holder member for cutting off electrical connection between the terminal plates.

Abstract: An electrical thermostatic switch, prior to calibration, has a flexible blade which is spring biased into contact with a thermostatic member. The end of the blade is submerged in a heat curable material. The switch is placed in an oven at a predetermined temperature level for calibration, with the result that the thermostatic element moves the flexible blade into the desired calibration position prior to curing of the heat curable material. The flexible element is thereafter held by the cured material in the desired calibration position.

Abstract: A combination thermostat tip switch assembly in which a bimetal member carrying a double-faced contact is mounted in a stack assembly between two resilient contact leaves each carrying an electrical contact adapted to mate with the double-faced contact. The stack is mounted on a rigid base member which supports an adjusting mechanism adapted to cooperate with one of the contact leaves so as to provide an adjustment of the operating temperature of the thermostat. A position sensitive mechanism in the form of a pendulum is mounted on one of the contact leaves and cooperates with the other contact leaf to move the two away from one another.

Abstract: Electric circuit breaker alternately providing overcurrent and/or over temperature protection by means of temperature responsive bimetal elements, whereby an increase in pressure as between electrical contacts is effected as the temperature may be increased up to the point of break, resulting in improved contact life and more effective contact when the device is subjected to external vibration.

Abstract: A combined thermostatic switch and tilt switch is disclosed which is of the stack type with slow make and break contacts. A temperature responsive element such as a bimetal actuates a set of contacts and an attitude responsive means such as a swingable pendulum also actuates a set of contacts. These two responsive means may actuate the same set of contacts or may actuate different sets of contacts in various embodiments of the invention, but a second set of contacts is provided in the switch as a standby set of contacts which may be actuated by one of the responsive means in the event that the first set of contacts fails to be actuated, e.g. by being welded together or some other malfunction. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.