US2528989A - Junction box - Google Patents

Description

J. G. AMM-ELLS Nov. 7, 1950 JUNCTION BOX Filed June 4, 1948 V/Ana R m km. A [N m m 3 A M .w a Y J B Patented Nov. 7, 1950 UNITED STATES PATENT OFFICE JUNCTION Box John Ammells, Haverhill, Mass.

Y Application June 4, 1948, SerialNo. 31,110

2 Claims.

This invention relates to new and useful improvements in junction boxes and the primary object of the present invention is to provide an means for rigidly securing the wires to the block.

Another important object of the present invention is to provide a junction box for electrical Wires including connector blocks'having adjustable set screws for removably securing Wires thereto in a Safe manner without having to employ a torch, solder or the like for fixing the wires to the connectors.

A further object of the present invention is to provide a junction box that is extremely small and compact in structure and which is provided with'spaced openings so arranged as to receive wires in a convenient manner without entanglement.

A still further aim of the present invention is to provide a junction box that is simple and practical in construction, strong and reliable in use, neat and attractive in appearance, relatively in expensive to manufacture, and otherwise well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the I details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure l is a perspective View of the junction box constructed in accordance with the present invention, and with the parts thereof broken away;

Figure 2 is a top plan view of the present juncticn box, the closure removed therefrom and showing electrical Wires connected to the same;

Figure 3 is a longitudinal vertical sectional view taken substantially on the plane of section line 3-3 of Figure 2;

Figure 4 is a perspective view of one of the connector blocks used in conjuntion with the present invention, the cover removed therefrom, and with parts broken away;

Figure 5 is an enlarged sectional view taken substantially on the plane of section line 55 of Figure 2, and showing the fasteners disengaged from the same; and

Figure 6 is a longitudinal vertical sectional View of the connector block in slightly modified form that is used in conjunction with the present invention. 1

Referring now to the drawings in detail, wherein for the purpose of illustration, there is disclosed a preferred embodiment of the present invention, the numeral 19 represents a casing of any suitable material having a bottom Wall l2 and a substantially hexagonal side wall l4 i'ncludingspaced shorter sides 55, l8and 29 that are provided with knockouts'or openings 22.

The edges of the peripheral wall l4 are disposed in the same planeto provide bearing edge 24. A pair of ears 25 are inte grallyforme'd with selected sides of the wan l4 and oppose an opening 23 and a slot 353 provided in aclosure plate or upper wall 32 so that fasteners 34 may extend through the opening 28 and slot Silto receivably engage the internally threaded apertures 36 provided on the cars 26. 7

The numeral 38 represents the connector blocks that are used in conjunction with the present invention generally. These blocks 38 are constructed from a suitable conductive material and the same are preferably arcuate in configuration to include concaved side faces 40 and flat upper and lower faces 42.

Spaced sockets or recesses 44 are provided in the concaved faces 40 of the blocks 38 and comthe coverings are formed with apertures 56 that register with sockets 44 and further apertures 53 that register with recesses 46. v

The coverings 52 are provided with integral extensions that embrace the ears 48 and sleeve-like portions 62 that are positioned in the apertures 50 of the cars 48.

Fasteners 64 extend through the sleeve-like portions 62 for removably securing the blocks 38 to the bottom wall 12 of the casing Ill in circumferentially spaced relationship.

In practical use of the present invention, cables 66 are extended into the casing I3 through openings 22 and these cables 66 include multistrands of wire 68 one of which is connected to each block 38. The strands 68 enter the sockets 44 and set screws 10 receivably engaging the recoverings, and the wall of the coverings 52 removed, whereby the blocks 38 may be removable from the coverings.

Reference is now directed to Figure 6, wherein there is disclosed the connector block '12 in slightly modified form. In this embodiment, the block 12 is constructed of a non-conductive material having integral ears 14 that receive suit- .able fasteners for removably securing the same relative to an outlet box or the like.

.A conductive plate 15 is preferably molded with the block l2 and communicates with fastener receiving recesses '53 provided in the upper .portion of the block 12' so that the fasteners positioned in the recesses 18 will be electrically connected to each other.

In view of the foregoing description taken in conjunction with the accompanying drawings it is believed that a clear understanding of the construct-ion, operation and advantages of the device willbe quite apparent to those skilled in this art. A more detailed description is accordingly deemed unnecessary.

It is to be understood, however, that even though there is herein shown and described a preferred embodiment of the invention the same is susceptible to certain changes fully comprehended by the spirit of the invention as herein described and thescope of the appended claims.

Having described the invention, what is claimed as new is: V

1. A junction box comprising a substantially hexagonal casing having alternate long and 4 short sides, a plurality of circumferentially spaced conductive blocks detachably mounted in said casing and opposing the long sides of said casing, attaching ears integrally formed with each of said blocks and having openings therein, sockets provided in one face of each of said blocks, internally threaded apertures provided in one face of each of said blocks communicating with said sockets, an insulated cover for each block having-openings in registry with therecesses in the sockets, said covers including sleeve 7 portions received in the openings in said attaching ears, fasteners received in said sleeve portions, and means receivably engaging said threaded apertures to retain wires positioned in said sockets, said covers completely enclosing said blocks, the short sides of said casing having apertures for receiving cables.

2. A wire holderfor junction boxes comprising an insulatedblock having a plurality of internally threaded recesses in one face thereof, a plurality of blind bores provided in a further face of said block intersecting said recesses, ears projecting from the ends of-said block and having openings therein, an insulated covering completely enclosing said block and said ears,

sleeve-like portions integrally formed with said covering and received in the openings in said ears, said covering having openings in registry with the recesses, and set screws receivably engaging said recesses.

JOHN G. AMMELLS.

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

UNITED STATES PATENTS

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