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US 4,558,394 AGranted
Capacitor unit with multiple selectable capacitance values
AssigneeAmerican Radionic Company, Inc.
InventorRobert M. Stockman
Life of this patent
Estimating the term…
Abstract
A single encapsulated wound capacitor unit (10) is made up of a number of sub-capacitors (12, 14, 16). The sub-capacitors are connected in parallel by insulated jumpers (30, 32) which extend outwardly from the capacitor encapsulant (36). A repairman may adjust the capacitance as required by cutting one or more of the exposed jumpers (30, 32) prior to installing the capacitor.
Claims4
A capacitor unit having multiple possible capacitance values selectable by the user which comprises:
- a plurality of sub-capacitors, each having first and second plates separated by a dielectric, wound concentrically and sequentially with the second, and each succeeding, capacitor being wound upon the preceding capacitor to form a single multi-capacitor section, the first plates of said capacitors extending to a first end of said section and the second plates of said capacitors extending to a second end of said section;
- means for electrically separating the first plates of said capacitors at the first end of said section;
- conductive means electrically interconnecting the second plates at the second end of said section;
- means encapsulating said section;
- electrical terminal means connected to the first plate of one of said capacitors and extending outwardly from said encapsulating means;
- and
- insulated conductor means interconnecting the first plates of at least one pair of said capacitors and partially exposed externally of said encapsulating means,
- whereby said conductor means may be cut to alter the capacitance of said capacitor unit.
5 more elements
A capacitor having multiple possible capacitances selectable by the user which comprises:
- a plurality of sub-capacitors wound sequentially one upon the other in a single multi-capacitor unit having first and second ends, each sub-capacitor having first and second plates separated by a dielectric and exposed, respectively, at said first and second ends;
- at least one dielectric barrier electrically separating the first plates of said sub-capacitors from one another at said first end;
- means for separately metallizing the first plate of each sub-capacitor at the first end of said unit;
- means for metallizing and electrically interconnecting the second plates of said sub-capacitors at the second end of said unit;
- means connected to the metallized end of said first plate of at least one of said sub-capacitors for making an external electrical connection thereto;
- means connected to the second end of said unit for making an external common electrical connection to the second plates of said sub-capacitors;
- an encapsulant enclosing said multi-capacitor unit;
- and
- jumper means interconnecting the first plates of at least two of said sub-capacitors and having a central portion extending outwardly from said encapsulant whereby it may be cut by a user.
6 more elements
The method of providing a single capacitor unit having multiple selectable capacitance values comprising the steps of:
- forming a single capacitor unit by winding concentrically and sequentially a plurality of sub-capacitor sections each having first and second plates separated by a dielectric, the first plate of each of said sub-capacitor sections extending to a first end of said single capacitor unit, and the second plate of each of said sub-capacitor sections extending to a second end of said single capacitor unit;
- separating said sub-capacitor sections from one another by winding a protruding insulating barrier between adjacent sub-capacitor sections, said barrier extending outwardly from the first end of said single capacitor unit;
- metallizing the first and second ends of said unit for providing electrical contacts to said first and second plates;
- connecting an electrical lead to the metallized second end of said unit;
- electrically interconnecting the first plates of said sub-capacitors with at least one insulated electrical jumper extending outwardly from said first end and bridging an intervening insulating barrier;
- connecting an electrical terminal to said first plates;
- and
- cutting at least one of said insulated jumpers to change the value of capacitance appearing across the terminals of said single capacitor unit.
5 more elements
Dependencies are inferred from the claim text.