US1334140A - Condenser and method of adjusting the same - Google Patents

Description

Wl DUBILIER.

CONDENSER AND METHOD'OF ADJUSTING THE SAME.

APPLICATION FILED AUG-M1918.

1,334, 140, Patented Mar. 16, 1920.

3 6 g ///fl Z-ZZQL avlveufoz $1 aflo'maua UNITED STATES PATENT OFFICE.

WILLIAM DUBILIER, OF NEW YORK, N. Y.

CONDENSER AND METHOD OF ADJUSTING THE SAME.

Application filed August 1,

To all whom it may concern:

Be it known that I, WILLIAM DUBILIER, of New York city, in the county of New York and in the State of New York, have invented a certain new and useful Improvement in Condensers and Methods of Adjusting the Same, and do hereby declare that the following is a full, clear, and exact description thereof.

In the manufacture of electrical condenseis, it has not been found feasible to perform all the operations with such exact uniformity as to insure that every condenser of a class will have the same capacity. The capacity usually varies to such an extent that it is necessary to adjust it in some Way to bring the condenser within allowed variations, or within the limits of error permitted in various uses, such as in wireless sending apparatus.

' The invention has for an object to bring about the adjustment of capacity in a simple and convenient manner, and without requiring tearing apart, or other damage to the'elements of the condenser.

Further objects and advantages of the invention will be in part obvious and in part specifically pointed out in the description hereinafter contained, in which is disclosed one embodiment of the invention, which, however, is to be considered merely as illustrative of itsprinciple.

In the drawings:

The single figureshows a plurality of condenser sections built up to form a condenser made in accordance with the invention.

Heretofore condensers made up of a large number of conducting plates and insulating sheets bound together in. some suitable man ner, have been tested after being Wholly completed, and the capacity adjusted by tearing ofi', or adding, the required number of insulating sheets and conducting plates, to bring the capacity within the necessary limits. After adjusting the capacity in this way, there is a certain amount of patch work on each condenser, which is obviously undesirable, and it is necessary to change the 1 terminal connections of the conducting plates in order to accommodate a greater or smaller number thereof, as may be required.

'In some instances condensers made up of a.

plurality of condenser. sections have been employed, each of such sections consisting of a number of conducting plates-and 'in-" sulating sheets suitably bound together, and

desired capacity (with prescribed limits of Specification of Letters Patent. Patented Mar. 16, 1920- 1918. Serial No. 247,742.

the terminals of the sections connected in series or in parallel to makeup the complete condenser. The capacity of condensers of this latter type has been brought within desired limits by tearing oil", or building on the necessary number of conducting plates and insulating sheets to the last section, which practice is open to the same objections as above mentioned, and also to the further disadvantage that the removal of conducting plates from the last or end section may reduce the area or efi'ective surface of the latter to such an extent as to cause a breakdown in that section.

In condensers where a high potential is .to be withstood, such as used in a wireless sending apparatus, it is desirable to distribute the potential over a large number of condenser sections, in order that no single sec tion may be subjected to an undue strain. The drawing shows a condenser of that type in which the disadvantages heretofore encountered in adjusting the capacity, are avoided, but it will be understood that the principle of the invention is applicable to, condensers of other types. In the single figure is shown a plurality of condenser sections 1, 2, 3, etc., which are joined in series by connections 4, 5, etc. By the term sec tion is meant a unit which has been built up of a plurality of conducting plates 6 and 7 of opposite polarity, and separated by insulating sheets 8, all of the above elements being bound together, for instance by pressure and an adhesive insulating compound, so as to form an integral unit which can be handled without disturbing the individual elements. In making up a con enser of any error), a plurality of such sections are built up, and the individual capacity of each section is made of such value that, when approximately the number of sections necessary to provide a complete condenser of approximately the desired capaclty, are connected, the addition or withdrawal of a section from the complete condenser will produce a chan e in the capacity of the condenser less than the permissible error. ;In

other words, when about the proper number of sections have been connected, the caparntyof the complete condenseris tested, and one or more sections added on or removed, as may be necessary. 1

Since the capacity of the sections has. been so chosen; that, whentheapproximate desired. capacity has been reached, the addition or removal of a section will produce a change in capacity less than the permissible variation from standard, it is always possible to bring the capacity of the condenser to a value within the prescribed limits, in the above manner.

The change in capacity is made merely by connecting or removing a section, the same operation which is gone through in assembling the condenser, so that no patch work l--i's involved, but the condenseris always made up of standard sections. It is not necessary to disturb the-individual con ducting plates or insulating sheets in any way, nor to tamper with terminals of the conducting plates; the only connections that need be changed are the ones 4, 5, etc, between adjacent sections, which change may be efiected without any damage to the condenser. Thus the condenser will always be made up of a number of standard sections, and the effective area of any of which need not be changed, and the charge wil be uniformly distributed between all such sections, thusavoiding danger of a breakdown, which might occur if the capacity were otherwise adjusted.

While, there is disclosed a specific form of the invention it will'be obvious that many changes may be made without departing from the principle of the invention, as de-' fined in the following claims.

I claim 1. The method of making a condenser having a desired capacity value within prescribed limits of error, which consists in providing-a plurality ofcondenser sections each having a plurality of condenser elements, and each having an individual capacity of such value that when approximately the number of sections necessary to provide a condenser of approximately the desired capacity are connected, the addition or withdrawal of a section will produce a change in the capacity of the condenser less than the permissible error, and connecting in series the requisite number of such sections.

2. An electrical condenser comprising a plurality of separable condenser sections each made up of a plurality of condenser elements, and'each having an individual capacity of such value that when approximately the number of sections necessary to.

provide a condenser of the desired capacity are connected, the addition or withdrawal of a section will produce a change in tlfe capacity of the condenser less than permissible error, and detachable connections joining said sections in series.

3. An electrical condenser comprising a plurality of condenser sections, each made up of a plurality of condenser elements, such a number of such sections being employed that the addition or removal of a section produces a change in the capacity of the condenser less than permissible error, and

' detachable connections joining said sections in series. a

In testimony that I claim the foregoing I have hereunto set my hand.

WILLIAM DUBILI-ER.

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