US699181A - Junction or fuse box. - Google Patents

Description

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2 Sheets-'Sheet I.

.b als Patented May 6, |902.

M. H. JOHNSON. JUNGTION 0H FUSE BOX.

(Apphcntxon filed Dec 28 1901 (No Model.)

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JUNCTION 0R FUSE BOX.

(Application mea Dec. 2s, 1901.) (No Model.) 2 Sheets-Sheet 2.

UNITED STATES PATENT OFFICE.

MONTGOMERY H. JOHNSON, OF UTICA, NEV YORK.

JUNCTION OR FUSE BOX.

SPECIFICATION forming part of VT ettersiPatent No. 699,181, dated May 6,1 1902,.. Application iiled December 28, 1901. Serial No. 87,517. (No model.)

To @ZZ whom it may concern,.-

Beit known that I, MONTGOMERY H. JOHN- SON, of Utica, in the county of Oneida and State of New York, have invented certain new and useful Improvements in Junction or Fuse Boxes; and I do hereby declare that the following is a full, clear, and exact description ol the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification.

The object of my present invention is to provide a junction or fuse box having a bottom orbase compartment and a removable tablet in which the electrical devices can be mounted and `to which access ymay be readily and conveniently had.

In the'd'rawings, Figure 1 shows a plan view of my fuse or junction box with the cover removed. Fig. 2 shows a section taken on line A B of Fig. 1. Fig. 3 shows a section taken on line O D of Fig. 1. Fig. 4. Yshows in plan view a modilied form of construction.V

Fig. 5 shows a longitudinal section of this construction, and Fig. 6 shows across-section taken on line `E F of Fig.' 5.

Referring' to the reference letters andV Eigures in a more particular description of the device, 1 indicates the walls of the box or casing, and 2 the bottom of the same. The interior of the box is lined as'to the sides with liners 3 of insulating material, as slate, and

.the bottom is also provided with a liner 4. of

similar material. Secured to the inner wall of the box is a rib or flange 5, constituting one part of the tablet on whichthe electrical devices are secured. In the same plane there is also supported and secured by means of the supports or straps 6 the removable portion of tablet 7. Both portions of thetablet are of insulating material. The tablet occupies such a position in the box as to provide the space 8 between the tablet and the bottom of the box. The box and electrical devices shown therein are arranged for what is known as a three-wire system, although this is not material to my invention.. As shown, there are two openings through one end of the box into the space between the bottom and the tablet (indicated, respectively, by m and i and inthe other end of the box a single opening, indicated by o.) In the sides oi' the box there are openings, (indicated by r.) According to the arrangement of the conductors and apparatus shown the entrances inthe ends of the box are used for the main leads, while the openings in the sides of the box are employed for the passage of the wires of the localcircuits, as in a house-lighting system. The conductors or connections for bringing the connections to the surface of the tablet are the same in both the main leads and the subcircuits, and the description of one will suffice for all. On the iixed or frame portion of the tablet is secured by one of its end branches the Z-shaped connecting-piece 9. AThe body portion of this piece passesthrough an opening on the line of separa# tion between the fixed and removable portions of the tablet, and at the lowerendy the inwardly-projecting end of the piece 9 takes a position beneath or behind the removable portion 7 of the tablet, and to this end may be secured by a screw 11 or in any other suitable manner the end of the wireor conductor 12. While the wire 12 as shown in the drawings is carried to the nearest and mostconvenient opening through the wall'of the box, it is evident that vit maybe carried across the box or to any regularly or irregularlylocated opening, and a considerable surplus length of wirecan be accommodated in the space 8 beneath the tablet. On the face side of the tablet ythere is provided on the piece 9 a binding-post, as 10, which may also include a screw that will secure the piece 9 in position. On the removable portion of the tablet 7 are located v the so-called bus-bars, (indicatedbyculnand c,respectively.) These may be connected in the construction as shown to the positive, negative, and neutral wires, respectively. Each bus-bar is provided with a main g binding-post, as 15, by means of which the bus-bars are connected with the main leads. The bus-bars are also provided with a series of other binding-posts (indicated by 16) and adapted to accommodate the connections to the local or-sub circuits. The binding- posts 16 and 10 are'located and arranged in pairs with a considerable space between them, which is known as the fuse-gap. The fuses (indicated by cross IOO the fuse-gap and are secured at their respective ends by binding-posts l0 and 1G. It will be noted that the line of separation between the iixed and removable portions of the tablet is in the fuse-gap; also, that while a considerable space (indicated by w) is shown in the drawings between the frame portion 5 and the main portion 7 of the tablet this space can be reduced simply to a line of separation, in which case the body portion of the connectors 9 would be inlet either in the frame 5 or the body 7.

When the fuses are removed, the body portion 7 of the tablet can be removed after taking out the securing-screws 6 at the corners. When the body portion of the tablet is removed, free access can be had to all the wires and connectionsin the base of the box, including the securing-screws or other attaching devices, which are all located directly behind or beneath the removable portion of the tablet. Access is also had to the entire length of the connecting-pieces 9.

In the modiiied form of construction shown in Figs. 4E, 5, and 6 the same form of box l, with bottom 2, side liners 3, and bottom liner 4, are employed; also, the same ixed frame portion of tablet 5 and removable portion 7, supported by straps 6. In the construction, however, shown in Figs. Lt, 5, and 6 the busbars (indicated by a', b, and c) are located in planes one above the other. The bus-bar a is supported by a bridge 20, which also constitutes a portion of the electrical connection and is provided with binding -posts upon either side, and the bus-bar b is supported by bridge 2l, which also constitutes a part of the electrical connection and is provided with binding-posts upon either side. The bus-bar c lies llat upon the face of the tablet, or nearly so, and is also provided with lateral branches 22 and 23 and binding-posts at their extremities. In the case of this construction the bars a' and b may be attached to the positive and negative leads, respectively, while the bar c is attached to the neu.- tral wire of a three-wire system. By locating the bus-bars in planes one above the other I am enabled to economize space and use a box or casing of smaller dimensions than in the construction illustrated in Figs. l to 3, inelusive.

In the modified form of construction the same Z-shaped connecting-pieces 9 are cinployed as in the construction previously described.

What I claim as new, and desire to secure by Letters Patent, is-

l. The combination in a fuse or junction box of the box or casing, an internal frame secured in the box above the bottom, a removable tablet supported within the said trame, entrances for electrical connections into said box below the tablet, fixed bindingposts on said frame electrically connected with the conductors, bus-bars and correspondingbinding-posts on the removable tablet and removable fuses, substantially as set forth.

2. The combination in a fuse or junction box of the casing, an internal frame secured to the side of the box above the bottom, a removable tablet supported within the frame, bus-bars7 and binding-posts arrangec'l on said tablet, corresponding; binding-posts arranged on said frame, Z-shaped connectingpieces extending from the binding posts through the line of separation between the frame and the tablet into the space beneath the tablet, entrances for electrical conductors into the space beneath the tablet and means for connecting the conductors to said Z- shaped connecting-pieces arranged beneath the tablet, substantiall)7 as set forth.

3. The combination in a fuse or junction box of a casing, a two-part tablet supported above the bottom of said easing, one of said parts being removably secured and the other part iixed in the casing, entrances into said casing for electric conductors between said tablet and bottom of casing, binding-posts on said fixed portion of tablet and corresponding` binding-posts mounted on the removable portion of the tablet, electrical distributing connections mounted upon and connected with the binding-posts on said removable portion and fuse-Wires connecting said two sets ol binding-posts and spanning the line of separation between the fixed and removable portions of tablet, substantially as set forth.

In witness whereof I have affixed my signature, in presence of two Witnesses, this 14th day of December, 1901.

MONTGOMERY II. JOHNSON.

Vitnesses:

J. BENJ. BRADY, S. A. BROWN.

ICO

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