US1637649A - Inductance - Google Patents

Description

' S. KUPKA INDUCTANCE Filed July 25. 1925 Patented Aug. 2, 1927. I

' UNITED STATES PATENT I OFFICE.-

s'rmm mxa, or cmcaeo, rumors nrnuc'rurcn.

Application ma Jul 25,1923. Serial 30. 48,007.

is so arranged as to minimize the effective electromagnetic field about the inductance, whereby two or moreof rthe inductan'ces constructed in accordance with myjinven tion, ma be placed in close proximity with one another, regardless of position, without 1 appreciably altering the internal resistance of the inductance.

A further object of the invention is to provide an inductance of the character described in which the internal capacity of W the inductance is reducedto a minimum.

A further object of m invention is to provide a device of the c aracter described which is simple in construction, compact in form, and thoroughly practical for the pur-.

2 pose intended.

Other objects and advantages. will appear in the following specification, and the novel features of the invention will be particularly pointed out in the appended claim.-

, 7 to My invention is illustrated in theaccom;

panyings forming part of this application, in which 4 Figure 1 is a perspective view of an embodiment of my invention, and

85 .Figure 2 is a diagrammatic view illustrating the arrangement of the winding of the inductance, Q

In carrying-out my invention I make use of a short tubular insulating member 1 upon 40 which the inductance is wound. This member is similar vin appearance and structure to the ordinary supporting member upon which the well known type of tuning coil employed in radio circuits is wound.

The winding of my im roved inductance consists of a single'gwvire aving a terminal 2 projected through an opening 3 adjacent to one end of the member 1. .The wire is wound dia nally across the outer surface of the mem r as shown at 4, then through the central opening of the cylindrical member, diagonally across the inner surface as shown at 5, and'back over the edge upon the outer surface, whereupon the same arrangement is carried out until the wirehas reached the point 6. This same arrangement is carried out to form a second disposition of the winding parallel to the first. This is continued until the roper length of wire has been wound in t 1e inductance. The 00 outermost end or opposite terminal 7 is projected through an opening 8 at the opposite end from the opening 3 and the entire device is emerged in insulating material, such as shellac or the like to hold the winding as in place. If it'is not desired to employ a cementitious medium to hold the windings in place they may be wound sufiiciently tight to old without such medium. In Figure 2 I have shown the arrangement of the winding, the succeeding turns to the first being indicated at 9.

From the foregoing description of the various parts of the device the operation thereof may be readily understood. Due to 15 the peculiar dis sition of the turns upon the member 1, t e efi'ec'tive electromagnetic field about the device, is minimized. and two or more .of the inductances may be placed in close proximity with one another, regardso less of the positions with respect to one another. without appreciably impairing the internal capacities or resistances of the several windings.

For this reason my im roved inductance as is especially well. adap for use in radio circuits.

I claim:

An inductance comprising a tube formed of insulating material, and a wire having 90. .one end project through an o eni'ng in said tube, said wire being woun around said tube and having the other end project through another'opening in said tube, the windings of said wire formin groups of 05 wire portions disposed diagonal y across the outer and inner surfaces of said tube, said groups being spaced apart.

STANLEY KUPKA.

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