Switch for water boiling appliance such as a kettle
First Claim
1. A steam-responsive switch for use in an electrical water boiling appliance comprising a main body from which extends a tubular portion having at or near its leading end a heat responsive member extending across the mouth thereof which changes shape above a predetermined temperature defining a chamber behind the member and at the opposite face of the main body an electrical contact pair, the heat responsive member engaging on its rear face a slidable actuating member which extends through the main body in a sealed manner to act on the electrical contact pair, the tubular portion having a vent at one side thereof adjacent the rear face of the heat responsive member opening into the chamber, for the egress of steam and the ingress of cool air.
1 Assignment
0 Petitions
Accused Products
Abstract
A steam-responsive switch for use in an electrical water boiling appliance comprises a main body (12) from which extends a tubular portion (13) having at or near its leading end a heat responsive bimetal (16) extending across the mouth thereof which changes shape above a predetermined temperature defining a chamber behind the member and at the opposite face of the main body (12) an electrical contact pair, the bimetal (16) engaging on its rear face a slidable pushrod (20) which extends through the main body (12) in a sealed manner to act on the electrical contact pair, the tubular portion having a steam/air vent (64) at one side thereof adjacent the rear face of the bimetal (16).
-
Citations
23 Claims
- 1. A steam-responsive switch for use in an electrical water boiling appliance comprising a main body from which extends a tubular portion having at or near its leading end a heat responsive member extending across the mouth thereof which changes shape above a predetermined temperature defining a chamber behind the member and at the opposite face of the main body an electrical contact pair, the heat responsive member engaging on its rear face a slidable actuating member which extends through the main body in a sealed manner to act on the electrical contact pair, the tubular portion having a vent at one side thereof adjacent the rear face of the heat responsive member opening into the chamber, for the egress of steam and the ingress of cool air.
- 12. A steam-responsive switch for a water boiling appliance comprising a forwardly-facing tubular portion of circular section having a heat responsive member arranged to extend across the forwardly-facing open mouth thereof and a rear portion supporting an electrical contact pair having a movable contact, a movable actuating member being provided which extends from the heat responsive member to the rear portion to act on the contact pair, the rear portion being of outer dimension slightly greater than the tubular portion with a shoulder therebetween whereby the switch has a plug-like shape for making a push-fit within a cylindrical opening or recess in an appliance. a rear portion supporting an electrical contact pair having a movable contact, a movable actuating member being provided which extends from the heat responsive member to the rear portion to act on the contact pair.
- 15. A steam-responsive switch for use in an electrical water boiling appliance comprising a main body from which extends a tubular portion having at or near its leading end a heat responsive member extending across the mouth thereof which changes shape above a predetermined temperature defining a chamber behind the member and at the opposite face of the main body an electrical contact pair, the heat responsive member engaging a slidable actuating member which extends through the main body to act on the electrical contact pair, and a flexible bellowstype seal provided between the actuating member and the main body through which the actuating member extends.
- 19. An electrical water boiling appliance with a steam-responsive switch, the appliance having a main water carrying body provided with a steam port at an upper region of the body and an opening or recess defined on the body or a housing part joined thereto which communicates with the steam port, the switch having a main switch body from which extends a tubular portion fitted into said opening or recess having at or near its leading end a heat responsive member extending across the mouth thereof which changes shape above a predetermined temperature defining a chamber behind the member, with an electrical contact pair disposed at the opposite face of the main switch body, a slidable actuating member which engages the heat responsive member extending through the main switch body in a sealed manner to act on the electrical contact pair, the tubular portion having a vent at one side thereof adjacent the rear face of the heat responsive member opening into the chamber for the egress of steam and the ingress of cool air.
Specification