US2438850A - Terminal clips - Google Patents

Description

March 30, 1948. c. J. FOT

TERMINAL CLIPS Filed Sept. 23, 1946 FiG.2

Fial

. lim mm Chin Jim For.

Patented Mar. 30, 1948 UNITED STATES PATENT OFFICE TERMINAL CLIPS Chin Jim Fot, Logan, W. Va, assignor to Gu'yan Machinery Company, Logan, W. Va., a corporation of West Virginia AppllcationSeptember 23, 1946, Serial No. 698,615

2 Claims. 1

This invention relates to means for mounting resistors in resistance units, for example, portable resistance units such as that disclosed in the patent to Hanna 2,076,561, April 13, 1937.

Commercial experience with units of the Hanna type has demonstrated the desirability of a simplified mounting for the resistance coils, arranged to permit ready withdrawal and replaccment of individual resistors.

In the Hanna unit the resistance coils extend between spaced insulating end plates which are sustained by a rectangular frame structure. According to the present invention each coil terminates at each of its ends in a laterally flattened collar with a longitudinally extending threaded stem. As a practical construction method, the end of the resistance coil is welded to the head of a preformed bolt. The insulating end plates are provided with alined apertures large enough for the endwise insertion of a coil. After a coil is inserted, end clips are put in place. Each clip has a cup-shaped boss which enters and fills the aperture in the end plate and has a hole which receives the bolt in the proximate end of the coil. The boss has lugs which embrace opposed flats on the bolt head to hold the coil against turning. A nut screwed on the end of the bolt is housed in the cupped side of the boss on the outer face of the clip and clamps the clip to the head of the bolt.

By constructing two clips as a unit cross-connection between ends of two adjacent coils is afforded. Incidentally each clip then holds the connected clip against turning. Sockets for terminal connections can be attached to any clip.

The single and double clips, the former being provided with connector sockets and the latter being constructed in two types, one with and the other without connector sockets, can be used to support and connect resistors in various relations which depend on the purpose for which the unit is to be used.

In this way the clips are made available for a variety of uses in all of which they provide for convenient removal and replacement of resistors.

The invention will now be described by reference to the accompanying drawings which illustrate the principles underlying the preferred construction.

Fig. 1 is a fragmentary end elevation of a resistance unit showing the outer face of an insulating plate forming part of the resistance unit with a single and a double clip mounted therein and each provided with a connector socket.

Fig. 2 is a section on the line 2 2 of Fig. 1, and shows how two resistors may be connected in parallel.

Fig. 3 is a perspective view of the lower clip shown in Fig. 1.

Fig. 4 is an elevation of the inner face of the clip shown in Fig. 3. In this view the attachment of one coil end is indicated.

Fig. 5 is an elevation of the outer face of a double clip having no connector socket.

Fig. 6 is a side elevation of the clip shown in Fig- 5.

Fig. 7 is an elevation of the rear face of the upper (single) clip shown in Fig. 1.

Fig. 8 is a section on the line 88 of Fig. 7.

The two end plates II and I2 (Fig. 2) are of insulating material and are spaced by a distance appropriate to the length of the resistors 13, here shown as helical coils.

Each end of each resistor is welded to the head 14 of a bolt whose threaded stem l5 projects endwise with its axis substantially coincident with the axis of the resistor helix. This offers a simple and inexpensive way to provide the ends of the coil with laterally flattened collars (the heads l4) and threaded extensions beyond such collars. Other ways of doing so are obviously within the range of mechanical skill.

The plates H and I2 are provided with alined apertures l6 and I1, large enough to permit a resistor 13 to be inserted endwise. After insertion, its ends are connected to clips which are of conducting material and substantially fill the hole I 6 or H as the case may be.

Referring first to the double clips shown in the lower part of Fig. 1 and in Figs. 2, 3 and 4, the clip comprises a plate or flange I8 with two cuplike bosses H! which substantially fill two adjacent apertures IS in plate II or apertures I! in plate I2, as the case may be. The ends of bosses l9 have each a hole to receive the corresponding threaded stem l5, and spaced lugs 2i which engage flats on the bolt head M to hold it against turning (see Fig. 4). The stem l5 and a nut 22 threaded thereon are housed in the cup of the boss and clamp the boss tightly, as best shown in Fig. 2.

The plate 18 is formed with an extension 23 in which is welded a tapered socket 24 for a connector plug (not shown).

If no socket is needed, the extension 23 and socket 24 are omitted, producing a clip of the form shown in Figs. 5 and 6. Such a clip is useful when two adjacent resistors are to be conplate H or I2 is appropriately drilled to receive it. This socket which is always used with a single clip, holds the clip against rotary shifting. The

flange engaging the face thereof, said bushing having means which engage the flattened collar to inhibit relative rotation of the collar and bushing after the stem is inserted through the aperdouble clip cannot so shift regardless of the presthe same basic concept and permit one ;or more resistors to be mounted between parallel insulating supporting plates and to be connected Variously, according to the needs of the particular installation. Resistors can be readily interchanged or replaced. The construction is simple, strong and inexpensive.

Variations of design within the scope of the claims are possible and are contemplated.

What is claimed is:

1. The combination of an apertured insulator; an elongated resistor so dimensioned that it may be moved to position endwise through the aperture in the insulator, said resistor having at its end a laterally flattened collar and a threaded stem projecting endwise beyond the collar; a flanged centrally apertured cup-like conducting bushing mounted with its cupped portion conflned in the aperture .in the insulator and its ture of the bushing; and a nut threaded on the stem housed in the cupped portion of the bushing and serving to clamp the bushing to the collar.

2. The combination of an insulator having a pair of spaced apertures; two elongated resistors, each insertlble endwise to its operative position through a corresponding aperture in the insulator, each resistor having at its end a laterally flattened collar and a threaded stem projecting endwise beyond the collar; a pair of flanged cuplike centrally apertured conducting bushings, the flanges thereof being connected rigidly together, each bushing mounted in a corresponding aperture in the insulator and each having means which engage the flattened collar to inhibit rotation of the collar after its stem is inserted through the aperture in the bushing; and nuts, one threaded on each stem, each housed in the cupped portion of the corresponding bushing and serving to clamp the bushing to the collar.

. CHIN JIM FOT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,698,184 Berry Jan. 8, 1929 1,963,328 Holinger June 19, 1934

Images