TIME DELAY BIMETALLIC RELAY
First Claim
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1. A bimetallic relay comprising:
- a. a base formed of insulating material;
b. a plurality of terminals extending through said base;
c. first and second substantially parallel bimetallic blades slotted along major portions of their respective lengths and connected mechanically and electrically to first and second terminals, respectively, said blades having substantially the same electrical resistance and extending toward each other between said terminals and overlapping at their free ends;
d. first and second contacts mounted on the overlapping portions of said first and second bimetallic blades, respectively; and
e. a heater element wound around said first bimetallic blade and electrically connected between two of said plurality of terminals, whereby said free ends of said first and second bimetallic blades will move through equal offsetting increments of deflection when subjected to changes in ambient temperature over a wide range of ambient temperatures, and load-current heating of said first and second bimetallic blades will also cause said free ends of said blades to move through equal offsetting increments of deflection when said contacts are closed.
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Accused Products
Abstract
A relay employing two slotted bimetallic blades mounted substantially parallel and overlapping at their free (unmounted) ends with a heater element associated with one of the blades.
17 Citations
3 Claims
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1. A bimetallic relay comprising:
- a. a base formed of insulating material;
b. a plurality of terminals extending through said base;
c. first and second substantially parallel bimetallic blades slotted along major portions of their respective lengths and connected mechanically and electrically to first and second terminals, respectively, said blades having substantially the same electrical resistance and extending toward each other between said terminals and overlapping at their free ends;
d. first and second contacts mounted on the overlapping portions of said first and second bimetallic blades, respectively; and
e. a heater element wound around said first bimetallic blade and electrically connected between two of said plurality of terminals, whereby said free ends of said first and second bimetallic blades will move through equal offsetting increments of deflection when subjected to changes in ambient temperature over a wide range of ambient temperatures, and load-current heating of said first and second bimetallic blades will also cause said free ends of said blades to move through equal offsetting increments of deflection when said contacts are closed.
- a. a base formed of insulating material;
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2. A bimetallic relay according to claim 1 wherein said heater element is connected between third and fourth terminals.
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3. A bimetallic relay according to claim 1 wherein said heater element consists of a resistive wire coated with an insulating material.
Specification
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Current AssigneeCooper Industries, Inc. (Eaton Corporation PLC.)
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Original AssigneeManlio O. Sepe
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InventorsSepe, Manlio O.
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Primary Examiner(s)Gilheany, Bernard A.
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Assistant Examiner(s)Morgan, Dewitt M.
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Application NumberUS04/835,564Time in Patent Office792 DaysField of Search73/363.5 337/95,99,100,101,102,103,111,370,371,378,379,85,86,96US Class Current337/101CPC Class CodesH01H 61/02 wherein the thermally-sensi...
