US1468653A - Condenser - Google Patents

Description

CONDENSER Filed July 30. 1923 Patented Sept. 25, 1923.

CLARENCE D. TUSKA, 0F HARTFORD, CONNECTICUT.

CONDENSER.

Application led July 30, 1923l Serial No. 654,753.

To all whom it may coment:

Be it known that I, CLARENCE D. TUsKA, a citizen of the United States, residing at Hartford, in the county ofHartford and State of Connecticut, have invented certain new and useful Improvements in Condensers,'of which the following is a specification, the same being a continuance of my application, Serial No. 620,534, filed February` 21, 1923.

his invention relates to condensers. A.

condenser involving the invention may be employed with utility in various Ways in the electric and allied arts, althou h in practice it has demonstrated particu ar advantage as part of the equipment of a wireless telegraph station. I have several objects in view, among the principal of them being the provision of an appliance of the character set forth, which is capable of inexpensive production, Without in any wise affecting its proper action. The device is comparatively light, yet strong, and it can be readily and easily operated to adjust or regulate its capacity. It may be constructed in various ways. In the drawings accompanying and forming part of the present'specification, I have| illustrated and will hereinafter describe in detail one ofthe many forms of the invention. This disclosure is primarily made to enable those skilled in the art to practice the invention. I am not restricted thereto. I may in fact depart therefrom in several particulars within the scope of the invention defined by the claims following said description.

Referring to said drawings- Figure 1 is a plan View of a form of my condenser;

Fig. 2 is an elevation of the form shown in Fig. 1. n

Like characters refer to like parts throughout the several views which are on different scales.

The condenser involves in its makeup at least two elements which are relatively adjustableto vary capacity. This relative adjustment, as will be inferred, may be obtained in various Ways. Usually, it is accomplished by the adjustment of one of the members or elements with respect to the other, yet this may not be necessary in all cases? At least one or both of these elements comprises a plurality of portions desirably flexible. For illustration, I have obtained excellent results by making one portion, that is the insulating portion .of some flexible material such as paper stock of which there are several kinds. I might note at this juncture that paper sheet material or thin board answers quite satisfactorily indeed. Likewise, the conducting part or portion of each element may vary. Satisfactory results have been obtained by the utilization of foil, such as tin-foil. Each portion or part, therefore, of each member or element, as I have considered the same, of the condenser is thus flexible..

lVith the foregoing observations, I will now describe more definitely the structure shown. 1

In Figs. 1 and 2 I show a flat construction. The bases' in this type is denoted by 20 and the elements or members of the active condensing portion by 21 `and 22 respectively. In this kind of condenser the member -21 is practically of half disk formation, the member 22 being a complete disk. Said member 21 consists of superposed half disks 23 and 24 of paper andan interposed half disk sheet 25 of tin-foil, the tin-foil being so disposed between the paper sheets 23 and 24 that there will be a selvage or marginal portion of paper material entirely around the tin-foil. The adjustable member 22 of disk form is fastened to the spindle 26 supported for turning movement by the base 20. The spindle 26 has a manipulating knob or finger piece 27 at its other end to facilitate its adjustment. This spindle rotates freely in the member 21. Through the member 22 the spindle 26 fixedly extends. This member 22 consists as shown Vof disks 23 and 24 and an interposed half disk 25 of tin-foil.

In order to show the construction illustrated in Figs. land 2 it has been necessary to separate the elements of the condenser 'much further than actually occurs in practice. For instance, in a condenser having a capacity of .0002 M. F. the stationary elements of the condenser represented by the numeral 21 would present a practically fiat upper surface because the half disk sheet 25 of tin-foil would be only .001,5 inch thick.

The paper and tin-foil are usually adhesively united in some convenient way. Although the paper stock Whollycovers and encloses the tin-foil, this may not always be necessary. In this articular construction shown, the twov tinoil portions are illustrated out of register with each other, so that thereby I secure the minimum capacity of the condenser. By moving the tin-foil sheets into register, the capacity of the condenser may be made maximum; this capacity may obviously be adjusted to any point from zero to the maximum, byturning the movable element.

The lower face 23 of the upper or adjustable elements designated by the numeral 22 would also have a substantially flat lower face which would practically engage the upper face 24 of the member 21. Therefore, the space 26 as shown in Fig. 6, if existing at all in practice, would be exceedingly minute.

It will further be observed that the' adjustable member 22 is, as a whole, flexible, and therefore readily conforms itself to any inequality in the upper surface of the member 2l.

It is obvious that this form of condenser may be so constructed that the spindle 26 need not be in electrical contact with either of the active conducting plates of the condenser which may be provided with any form of suiable terminals, not shown.

l. In a variable condenser. a plate comprising a pair of thin flexible discs of dielectric material and a sheet of metallic foill between said discs, and a second conducting platel in superposed relation to said first mentioned plate, one of said plates being movable with respect to the other.

2. In a variable condenser, a fixed plate' comprising a pair of thin flexible dielectric discs and a sheet of metallic foil interposed between said discs, a rotatable metallic plate in superposed relation to said fixed plate, and means for rotating said rotatable plate.

3. In a variable condenser, an adjustable flexible element adapted for circular rotation in a fixed plane comprising, a flexible conducting sheet and flexible non-conducting sheets on both faces thereof.

4. In a variable condenser, an adjustable flxible electrode member adapted for circular rotation in a fixed plane having conducting sheet of metallic foil and a flexible covering of non-conducting material on both faces thereof.

5. In a variable condenser, an adjustable electrode member comprisig, a pair of superposed flexible non-conducting discs and a sheet of metal foil interposed between said discs,

6. In a variable condenser, a fixed element, and a flexible rotatable element comprising, a thinflexible metallic disc and flexible sheets of insulating material on both sides of and attached to the metallic dise.

7. A variable condenser comprising, a flat immovable fixed electrode, an insulating layer adjacent thereto and carried by the support for the condenser, an electrode comprising a flexible metallic plate, and means for moving the flexible plate to vary the capacity of the condenser.

8. A variable condenser comprising, a flat immovable fixed conducting electrode, an insulating layer adjacent thereto and car- .ried by the support for the condenser, and

a flexible electrode relatively movable with respect to the first mentioned electrode.

9. A variable condenser comprising, a flat immovable conducting sheet, an insulating layer adjacent thereto and upon which the surface of the conducting sheet is adapted to contact, said insulating layer being carried by the support for the condenser, and a movable flexible conducting element for varying the capacity of the condenser.

In testimony whereof I affix my signature,

CLARENCE D. TUSKA.

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