초록 ▼

A thermally-sensitive electrical control is mounted to the head of an electric immersion heater of an electric kettle or like container. The control has an outer periphery of less radial extent than the head so as to be passable, during assembly, through an opening in the wall of the associated cont

A thermally-sensitive electrical control is mounted to the head of an electric immersion heater of an electric kettle or like container. The control has an outer periphery of less radial extent than the head so as to be passable, during assembly, through an opening in the wall of the associated container such that the head may be positioned in the opening with the control mounted thereto by insertion of the control through the opening from inside the container. The control includes an electric switch and a snap-action, overheat sensing bimetallic actuator disposed on the side of a body portion of the control which faces the head when the control is mounted thereto and a snap-action steam responsive bimetallic actuator mounted to the opposite side of the body portion. The switch is operated by the bimetallic actuators through an over-center mechanism disposed on the opposite side of the body portion and connected to the switch by a U-shaped link slidbly mounted in the body portion. Terminal pins, adapted to be engaged by a separate socket connector, are disposed on an opposite side of the control body portion. The body portion includes a shelf member which is disposed between and separates the terminals from the steam responsive bimetallic actuator and over-center mechanism.

대표청구항 ▼

A thermally-sensitive electrical control for an electric immersion heater for containers, the immersion heater having a heating element carried by a head adapted to be secured in a watertight manner in or adjacent an opening in a container wall, the heating element terminating in cold leads by means

A thermally-sensitive electrical control for an electric immersion heater for containers, the immersion heater having a heating element carried by a head adapted to be secured in a watertight manner in or adjacent an opening in a container wall, the heating element terminating in cold leads by means of which electrical connections are made to the heater, said control being adapted to be mounted on the head of an immersion heater and having an outer periphery of less radial extent than a peripheral portion of the head so as to be passable through the opening in a wall of a container whereby the head may be positioned in or adjacent the opening with the control mounted thereon by insertion of the control through the opening from inside the container, said control comprising: (a) a body portion having a generally axial plane which includes a longitudinal axis of the body portion, the longitudinal axis extending generally perpendicular to the plane of the opening; (b) electrical switch means mounted to the body portion adapted to interrupt the power supplied to the heating elements; (c) first and second thermally responsive actuating means connected to the electrical switch means for operation thereof upon the element overheating and upon liquid within the container boiling, at least the second actuating means being mounted on the control and acting on the electrical switch means through an over-centre spring mechanism and being adapted to be exposed in use to steam or vapour resulting from liquid within the container boiling; (d) means shielding the electrical switch means from such steam or vapour; and, (e) terminal pins mounted on the body portion having free end portions adapted to be engaged by a separate socket connector for connecting the heating element via said electrical switch means to a source of electrical power, said electrical switch means and said first actuating means being disposed on a first side of the body portion, which first side faces the head of a heater when mounted thereto, said over-centre spring mechanism and said second actuating means being mounted to a second, opposite side of the body portion and being disposed on one side of said generally axial plane, the free end portions of the terminal pins being disposed on the opposite side of said generally axial plane generally opposite said over-centre spring mechanism and said second actuating means. A container comprising: (a) an electric immersion heater having a heating element carried by a head adapted to be secured in a watertight manner adjacent an opening in a container wall, the heating element terminating in cold leads by means of which electrical connections are made to the heater; and (b) a thermally sensitive electrical control being mounted on the head of the immersion heater and hving an outer periphery of less radial extent than a peripheral portion of the head so as to be passable through the opening in a wall of the a container whereby the head may be positioned adjacent the opening with the control mounted thereon by insertion of the control through the opening from inside the container, in said control comprising: (i) a body portion having a generally axial plane which includes a longitudinal axis of the body portion, the longitudinal axis extending generally perpendicular to the plane of the opening; (ii) electrical switch means mounted to the body portion and adapted to interrupt power supplied to the heating element; (iii) first and second thermally responsive actuating means connected to said electrical switch means for operation thereof, upon the element overheating and upon liquid within the container boiling, at least said second thermally responsive actuating means being mounted on the control and acting on said switch means through an over-centre spring mechanism and being exposed in use to steam or vapour resulting from liquid within the container boiling; (iv) means shielding the electrical switch means from such steam or vapour; and, (v) terminal pins mounted on the body portion having free end portions adapted to be engaged by a separate socket connector for connecting the element via said electrical switch means to a source of electrical power, said electrical switch means and said first thermally responsive actuating means being disposed on a first side of the body portion which first faces the head of a heater when mounted thereto, said, over-centre spring mechanism and said second actuating means being mounted to a second opposite side of a body portion and being respectively disposed to one side of said generally axial plane the free end portions of the terminal pins being disposed to the other side of said generally axial plane generally opposite said over-centre spring mechanism and said second actuating means.