Electric power controllers
First Claim
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1. A power controller for the controllable supply of electrical power intermittently to a load, comprising:
- a housing;
a snap switch having a snap switch carrier on which a snap spring, bearing a switching contact, is mounted, said snap switch carrier being pivotably mounted on a fulcrum point in said housing;
an L-shaped bimetal member pivotally mounted in said housing and having a lever by which it acts on said snap switch, said lever extending at an angle to said bimetal member and substantially parallel to said snap switch carrier;
means for heating said bimetal member in dependence upon the power supplied to said load via said snap switch;
a compensation bimetal strip secured to said snap switch carrier at the fulcrum point side thereof and extending substantially parallel thereto; and
,control cam means acting upon a free end of said compensation bimetal strip, said bimetal member and said snap switch carrier forming an L-shaped arrangement running along two sides of the housing, said control cam means being arranged in the middle area of the housing and inside the angle of said L-shaped arrangement.
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Abstract
A power controller for controlling the intermittent supply of current to a load, such as a cooker hotplate, has a pivotally mounted snap switch controlled by a heated bimetal member which is heated in dependence upon the connected power. A compensating bimetal strip, for taking ambient temperature into account, is arranged on the snap switch and parallel thereto. A control cam acts on the free end of the compensating bimetal strip. The latter is shielded from the heat of the heated bimetal member.
34 Citations
20 Claims
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1. A power controller for the controllable supply of electrical power intermittently to a load, comprising:
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a housing; a snap switch having a snap switch carrier on which a snap spring, bearing a switching contact, is mounted, said snap switch carrier being pivotably mounted on a fulcrum point in said housing; an L-shaped bimetal member pivotally mounted in said housing and having a lever by which it acts on said snap switch, said lever extending at an angle to said bimetal member and substantially parallel to said snap switch carrier; means for heating said bimetal member in dependence upon the power supplied to said load via said snap switch; a compensation bimetal strip secured to said snap switch carrier at the fulcrum point side thereof and extending substantially parallel thereto; and
,control cam means acting upon a free end of said compensation bimetal strip, said bimetal member and said snap switch carrier forming an L-shaped arrangement running along two sides of the housing, said control cam means being arranged in the middle area of the housing and inside the angle of said L-shaped arrangement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification