US3070648A - Package for electronic components - Google Patents

Description

Dec. 25, 1962 w. M. HENNESSEY 3,070,648

PACKAGE FOR ELECTRONIC COMPONENTS Filed Sept. 6, 1960 FIG.

I IO 24 /g INVENTOR. 57 48 4 36 WILLIAM MHENNESSEY ZMQ/aw ATTORNEY United States Patent Ofifice 3,070,648 Patented Dec. 25, 1962 3,d7tl,648 PACKAGE FOR ELECTRONIC COMIQNENT William M. Henriessey, Rosiyn, Pa, assignor to Burroughs Corporation, Detroit, Mich., a corporation of Michigan Filed Sept. 6, 1960, Ser. No. 54,232 4 Claims. (Cl. 17452) This invention relates to the art of packaging small electronic components and particularly to a novel package for a pulse transformer.

A pulse transformer of the type contemplated by the present invention comprises a ring of magnetic material on which is wound a plurality of electrical windings. Generally, this assembly is mounted in a container of plastic or metal with the leads to the windings projecting through the container. In some constructions, particularly those in which the container comprises a thin-walled metallic tube, it is comparatively difficult to provide a support arrangement for the transformer which is rugged, comparatively inexpensive, and simple in construction so that it is readily adapted to mass production operation.

Accordingly, the principles and objects of the present invention are concerned with the provision of an improved package for a pulse transformer, the package being characterized by its ruggedness, simplicity, and adaptability to mass production techniques.

Briefly, the package of the invention includes two identical insulating support plates which are adapted to support the transformer and which carry electrical leads to which the transformer windings are connected. The plates are oriented with respect to each other so that they support the transformer rigidly within the container and the leads are carried thereby so that they all extend from the container lying in the same plane. The simplicity in the number of parts and their arrangement allows mass production assembly of the units.

The invention is described in greater detail by reference to the drawing wherein:

P16. 1 is a sectional view of the package of the invention;

PEG. 2 is an end View, partly in section, of the apparatus of FIG. 1;

PEG. 3 is an exploded perspective view of portions of the apparatus of FIG. 1; and

FIG. 4 is an end view, partly in section, of the parts shown in FIG. 3 when assembled.

The package it? of the invention includes an open-ended hollow metallic cylinder 12 having its ends closed by members 7.4 and M which comprise bodies 18 and 24], respectively, of a suitable insulating material, each having a metal ring 22, 2 3 secured to its periphery. The members i4 and 16 are adapted to form a tight fit with the open ends of cylinder 12 and, preferably, are positioned inside the cylinder. Thus, in the preferred arrangement, the members 14 and id have substantially the same diameter as the inside diameter of cylinder 12, and in the completed package are sealed thereto by soldering, welding, or in any other suitable fashion. Each end piece 13, 2t carries two metallic sleeves 26, 28 adapted to receive lead wires.

The pulse transformer is mounted within the cylinder on a support which includes two identical thin T-shaped core-support members 36 and 3d of a suitable synthetic resinous insulating material. Since the support members are identical, only member 3% is described in detail, and the corresponding parts carry the same reference numerals, the numerals associated with member 30' being primed. identical apparatus secured to the two support members are similarly identified. The core support member 30 includes a base 34 and a cross arm 36, with the base having a slot 38 which extends along the greater portion of its length. The support member 30' includes a base 34' and a cross arm 36, with the base having a slot 38' which extends along the greater portion of its length. The cross arms are substantially as long as the internal diameter of the tube in which the transformer assembly is mounted.

The cross arm 36 of the first T member 30 is provided with two apertures 46 and 48 aligned with the longitudinal axis of the cross arm, and metal eyelets 50 and 52 are secured thereto, one in each aperture. A first metallic lead 54, secured in the eyelet 56 by soldering or the like, extends vertically a short distance from the surface 55 of the cross arm and is then bent perpendicularly so that it extends rearwardly away from the cross arm and away from the base. A similar lead 56, secured by soldering or the like to eyelet 54, extends vertically from the opposite surface 5'7 of the cross arm, bends perpendicularly, and extends rearwardly in the same direction as the lead 54 and parallel thereto. The leads 54 and 56 thus lie spaced apart and parallel to each other, and a plane which includes both leads is disposed at a 45 angle to the plane of the T member 30.

The T member 36 is similarly constructed and includes identical leads 54' and 5a which also lie in a plane which is disposed at a 45 angle to the plane of T member 39.

A pulse transformer tit packaged according to the invention includes a magnetic core 62 on which, as shown, two sets of windings are provided, one winding having ends 64 and as and the other having ends 68 and 70. In assembling the package of the invention, the two T-shaped support members 3% and 3%) are positioned at a angle to each other and the bases 34 and 34- are threaded through the central aperture of the core of the pulse transformer. The bases 34 and 34' are interlocked by means of their slots, and they are brought together until each cross arm 36 and 36 bears against the core. As shown in PG. 1, the base members 34 and 34' are of sufficient length so that each engages and extends across substan tially the entire width of the cross arm of the other support member. Thus, base member 34 engages cross arm 36', and base member 34' engages cross arm 36. In addition, the slots 38 and 38' are sufficiently narrow so that a tight fit is formed between each base member and the cross member which it engages. Thus, the two T members are locked securely in position with the transformer held securely between members 36 and 36'. When thus locked together, the leads 54, 5t), 54, 56 all lie in the same plane, and this plane lies at a 45 angle to both support members. The ends 64 and 66 of one winding are soldered to lead wires 54 and 5e, and the ends 63 and "70 of the other winding are soldered to lead wires 54' and 56.

Next, end plate 15 is threaded on lead wires 54 and 56, and the assembly is placed within the cylinder. The end plate in is then soldered or otherwise secured to the cylinder 12. through its metal ring 24. The assembly of transformer 6t? and support members 30 and 34) thus mounted in the cylinder forms a tight fit with the cylinder since the cross arms 36 and 36' have a length substantially equal to the inside diameter of the cylinder. The cylinder is filled with a suitable potting material such as an epoxy resin, and the end plate 14 is threaded on leads 54- and 5d. The end plate 14 is sealed to the cylinder 12 through its ring 22 by soldering or the like, and a compact, rugged assembly is completed.

It is not essential that the cylinder be filled with a potting material. if the spotting material is omitted, then the cylinder may be of such a length that the end plates 14 and 16 bear against the cross members 36 and 36. Thus, a smaller package with optimum ruggedness is provided. The package may also be vacuum-sealed if desired.

It is clear that the principles of the invention apply to the packaging of any type of electronic component, not necesarily a pulse transformer. In addition, many mechanical modifications may be made within the scope of the invention. For example, the enclosing cylinder need not be circular in cross-section but may have other shapes.

What is claimed is:

1. A package for electronic apparatus including an enclosing container having first and second ends, first and second identical T-shaped support plates coupled together at a 90 angle with respect to each other, each support plate including a cross arm and a base member, the base members being slotted longitudinally so that the support plates can be threaded on each other with the base member of one support member engaging and forming a tight iit with the cross arm of the other support plate, an annular electronic device threaded on the base members of said support plates with said cross arms bearing against said annular device and securing it in position, a first pair of lead wires carried by said device and secured to said first plate with the members of the pair lying on opposite sides of said first plate and extending through said first end of said container, at second pair of lead Wires carried by said device and secured to said second plate With the members of the second pair lying on opposite sides of the second plate and extending through said second end of said container, said first and second pairs of lead wires lying in the same plane, and means, sealing said first and second ends of said container.

2. The package defined in claim 1 wherein the pairs of leads are secured to corresponding portions of each T-shaped support plate.

3. The package defined in claim 1 wherein each pair of leads is secured to the cross arm of its support plate.

4. The package defined in claim 1 wherein the leads of each of leads lie parallel to each other on opposite sides of its support plate, corresponding leads being secured to corresponding portions of the support plates and having corresponding physical orientation so that the support plates and the leads carried thereby are identical.

References in the file of this patent UNITED STATES PATENTS 2,428,826 Bauer Oct. 14, 1947 2,527,819 Ianney Oct. 31, 1950 2,623,101 Kurland et al. Dec. 23, 1952 2,787,767 Goldsmith Apr. 2, 1957

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