US1735072A

US1735072A - Fuse-block housing

Info

Publication number: US1735072A
Application number: US153047A
Authority: US
Inventors: Reuben B Benjamin
Original assignee: BENJAMIN ELECTRIC Manufacturing CO
Current assignee: Benjamin Electric Manufacturing Co
Priority date: 1926-12-06
Filing date: 1926-12-06
Publication date: 1929-11-12
Anticipated expiration: 1946-11-12

Description

NOV. l2, 1929. R Q BENJAMlN 1,735,072

FUSE BLOCK HOUSING Filed Deo. 6. 1926 4 Sheets-Sheet l /6 {fo/f5 19 F1333 5 FITT'IIIRNEY'S NOV. l2, 1929. K- R BENJAMlN 1,735,072

FUSE BLOCK HOUSING Filed Dec. 6. 1926 4 Sheets-Sheet 2 mvENfP [1R f- Qm, @WW/dwf v HT'TIIIRNEYS.

Nov. l2, 1929. R B BENJAMIN FUSE BLOCK HOUSING Filed Dec. 6. 1925 4 Sheets-Sheet BYA EM' E QTTURNEYE,

Nov. 12,' 1929.

R. B. BENJAMIN FUSE BLOCK HOUSING Filed Deo. 6. 1926 4 Sheets-Sheet 4 INVENTR n, l @AMM/VM FW'VCIRNEY E ANJ housing for the fuse block.

Patented Nov. 12, 1929 UNITED STATES PATENTr OFFICE REUBEN E. BENJAMIN, OF CHICAGO, ILLINOIS, AssIGNCE To BENJAMIN ELECTRIC MANUFACTURING COMPANY, OE CHICAGO, ILLINOIS, A CORPORATION OE ILLINOIS Application filed December 6, 192.6` Serial 170.153,04?.

My invention relates to a housing construction for the branch overload protective devices which are associated with the service boxes.

In certain electric installations it is desirable Athat the service boxes shall be closed and sealed so as not to be accessible to the tenant; but that the fuse receptacles for the branch circuits shall be housed in such a manner that they will be accessible to the tenant.

One of the objects of iny invention is to provide a housing construction for branch fuse receptacles or other overload protective devices which will fulfill the above indicated requirements.

A further Object of my invention is to provide such a housing construction which will fit in well with present day service box construction.

A further object of my invention is to provide such a construction in which the trough which connects the service boxes in certain types of installation forms a part of the Further objects will appear from the description and claims.

In the drawings in which an embodiment of my invention is shown- Figure 1 is a view showing parts of two service boxes with the connecting trough and the fuse block in place in the trough;

Fig. Q is a section on the line 2-2 of Fig. 1, but showing the covers in position;

Fig. 3 is a section on the line 3-3 of Fig. 1, but showing the covers in position;

Fig. 4 is a section on the line 4-4 of `Fig. 1;

Referring now .t0 the construction in detail, Fig. 1 shows an installation in which two two-,wire branch circuits ,are derived from a three-wire line circuit.

The fuse block 10 is mounted in the trough 11 above .the line wires .extending .between the service boxes 11a` and 11b. A positive line wire 11c from the meter in the left-hand serv.- ice box is connected at 12, with the center contact member 13m. the left-hand fuse receptackle, Vand a ositive branch wire -14 is connected at 15 with the shell contact 16 of the left-hand `ruse receptacle land leads to the branch conduit 17, whichfextends upwardly from vrthe trough 11. A neutral wire 18 is tapped off fromthe Aneutral line wire, and connected at19 to the neutral binding plate 20130111 which a neutral branch wire lglead to the conduit 17 Y to complete the A@i1-"cuit orjthe positive branch wire previously re.-

to the branch conduit to complete the circuit' for the branch Wire referred t0- "Ihere are thus derived two branch circuits with fnses for the potential branches 4but with no fuses .for the neutral branches- Reiferring now somewhat more in detail to the specifi-ic construction of the fuse block, this LcQmpriSeS an 4llsulating base 30, .0n which the fuse receptacle .contacts and `lient-ral wir` ing terminals `are mounted andan insulating cover 31 having openings for the fuse recep` tacles and having a portonSQ vServing as .a cover for the wiring terminals on :the fuse block and -for thefwires iadjacent the fuse block. The insulating base ,30 is l.Incnlriicd on `a Sheet metal support 33, having lugs 34 which slip into slots in the trough 11, and having a lip 35 to receive the securing screw 36 which holds the supportin place in the trough.

V The sheet metal cover 37, shown in Fig. 5, has upper and lower ilanges 3S and 39, which it over the edges oi"- the trough and has

side flanges

40 and 41, which tit inside the edges of the

covers

42 and 43 of the service boxes, vso that when the serviceboxes are closed and sealed, the cover 37, Ator the trough is securely held in place. This cover S7 has an enlarged oval opening 43a, affording i'ree access of the fuse bloclrwheii the hinged cover 43h for the trough is opened.

The construction shown in Fig. 6 is substantially the same as that just described, eX- cept that here the trough 44 is long enough to accommodate two of the -l'use blocks and is provided with two

branch conduits

45 and 46 so that a greater number of branch circuits may be derived, or so'that a greater number ot the branch wires may be provided with fuses.

The construction shown in Figs. 7, 8, and 9 is similar to the constructions previously described, except that here the overload protective devices are mounted in two rows, one above the other', so that the casing between the two

service boxes

47 and 48 is considerably higher than'in the form previously described. As in the previous forms, the casing 49 is provided with a gutter portion 50, for the line wires leading from one service box to the other, and is provided with a sheet metal cover Y51, to vbe opened by the tenant to permit access to the fuse receptacles 51a. A common binding plate 52 is provided for the neutral branch wires. The binding screw 53 for the neutral. binding plate is connected with the nuetral line wire 54. A positive line wire (not shown) from the lefthand service box may be connected with the binding screw 55, common to the center contacts of the two left-hand fuse receptacles, and a negative line wire (not shown) from the right-hand service box may be'connected with the binding screw 56, common to the center contacts to the right-hand fuse recoptacles.

Potential branch wires are connected with the

binding screws

57, 58, 59 and 60 for the shell contacts of the fuse receptacles and neutral branch Wires are connected with the binding screws 61, 62, 63, and 64 of the neutral binding plate. The casing is provided with

branch conduits

65 and 66 leading therefrom for the branching wires.

In this form, there are thus derived tour branch circuits with fuses for the potential branches but with no fuses for the neutral branches.

Reference is hereby made to my application, Serial No. 673,664, filed November 9, 1923, for which this application is a substitute.

I claim:

1. `The combination with a pair of sealed service boxes, and a trough providing a passage for the line wires between said boxes, ot overload protective devices in said trough, and an unsealed cover for said trough permitting access to the overload protective devices when open.

2. The combination with a pair of sealed service boxes, and a trough providing a passage tor line wires between said boxes, ot overload protective devices for branch wires in said trough, and an unsealed cover itor said trough permitting access to the overload protective devices when open, said trough having an opening for the branch wires leading therefrom.

rlhe combination with a pair of sealed service boxes and a casing between said boxes, comprising a trough provided with a passage for line wires between said boxes, of overload protective devices 'for branch wires in said casing, and an unsealed cover for said casing permitting access to the overload protective devices wien open, said casing having an opening i'or branch wires leading therefrom, said overload protective devices being provided with an insulating base lying in liront or' said line wires.

ln witness whereof, I have hereunto subscribed iny name.

' REUBEN B. BENJAMIN.