Abstract:
Die Erfindung betrifft einen Überlastauslöser (1), insbesondere für einen Leistungsschalter mit einem Metallstreifen (2) aus mindestens zwei unterschiedlichen Metallarten, um welchen ein Heizleiter (3) gewickelt ist. Die Erfindung zeichnet sich dadurch aus, dass die mechanische und elektrische Anbindung des Metallstreifens (2) vollständig oder teilweise getrennt ausgeprägt ist, so dass bei vollständiger Ausprägung kein Strom über die mechanische Anbindung des Metallstreifens (2) fließt und bei teilweiser Ausprägung ein Teil des Stroms über die mechanische Anbindung fließt.
Abstract:
A thermally-responsive differential expansion device is similar to a bimetallic device but has its plural layers formed of synthetic plastics materials having lower thermal conductivity whereby the device can sustain a greater temperature differential across its thickness (eg. 10 °C) than the negligible differential that a high thermal conductivity bimetal can sustain. Such a 'biplastics' device can be arranged to be insensitive to the constantly rising temperature as water is heated in a kettle since the device will maintain a generally constant temperature differential, but will respond to the onset of boiling when the temperature differential across the device will disappear. Enhanced effects are obtained by use of fibre reinforced plastics materials with the fibres differently oriented in the different layers, so as to take advantage of the dependency of the coefficient of linear expansion upon fibre orientation. Such 'biplastics' devices provide advantages in kettle controls for example since the sensor has only to be mounted on the outside of the kettle wall and need not be exposed to live steam to operate as a boiling control.
Abstract:
A thermal deformation member (1) for electron tubes or current controllers composed of a multilayer body formed by stacking a high thermal expansion member (1) made of, for example, an Fe-Ni-Cr alloy, an intermediate member (4) made of one kind of metal selected from among Fe, Al, and Cu or an alloy containing some of the metals, and a low thermal expansion member (2) made of, for example, an Fe-Ni alloy. The coefficient of thermal expansion alpha 3 of the intermediate member (4) is greater than that alpha 2 of the low thermal expansion member (2) and smaller than that alpha , the high thermal expansion member 1 ( alpha 1> alpha 3> alpha 2). The intermediate member (4) reduces the manufacturing cost and improves the workability without deteriorating the strength and long-term reliability of the members. A color picture tube is manufactured using the above-mentioned thermal deformation member for electron tubes in the thermal deformation section of a frame holder one end of which is fixed to a panel and the other end of which is firmly stuck to the mask frame of a shadow mask. An overcurrent protector is manufactured using the above-mentioned thermal deformation member for current controllers in the thermal deformation section which opens a contact.
Abstract:
A non-resetable , bimetallic thermal switch. The bimetallic ther mal switch includes a bimetallic element, first and second electrical contacts, and a component for electrically connecting and disconnecting the first and second electrical contacts based on movement of the bimetallic element. The switch also includes a non-resetable component configured to disallow electrical reconnection of the first and second electrical contacts after an electrical disconnection has occured between the first and second electrical contacts.