US2084580A

US2084580A - Bus bar supporting means in bus duct

Info

Publication number: US2084580A
Application number: US38842A
Authority: US
Inventors: William H Frank
Original assignee: Individual
Current assignee: Individual
Priority date: 1935-08-31
Filing date: 1935-08-31
Publication date: 1937-06-22
Anticipated expiration: 1954-06-22

Description

June 22, 1937. w. H. FRANK 2,084,580

BUS BAR SUPPORTING MEANS IN BUS DUCT Filed Aug. 31 1935 4 Sheets-Sheet 1 INVENT OR.

' A J w.

W ATTORNEY.

June 22, 1937. w. H. FRANK BUS BAR sunonune MEANS IN BUS DUCT Filed Aug. 31. 1935 v 4 Sheets-Sheet 2 INVENTOR. M A 54% BY ATTORNEY.

June 22, 1937. w. H. FRANK BUS BAR SUPPORTING MEANS IN BUS DUCT Filed Aug. 51, 1935 4 Sheets-Sheet 3 IN VENTOR.

ATTORNEY.

v June 22. 1937. v w, FRANK I Q 2,084,580

BUS BAR SUPPORTING MEANS IN BUS DUCT Filed Aug. 31, 1955 4 Sheets-Sheet 4 ATTORNEY.

INVENTOR.

Patented June 22, 193? FHCE fifiildfifiii IEIUS EAR SWEFORTING MEAN S IN BUS DUCT It (Claim.

This application relates to electrical distribution systems. The subject matter of this application was originally disclosed to the Patent Office in application Serial No. 735,743, filed July 18,

5- 1,934, which issued as Patent No. 2,009,376 of July 23, 1935 and was also disclosed in. an application Serial No. 31,296, filed July .13, 1935, which issued into Patent No. 2,059,988oi November 3, i936, and it is here claimed that the subject matter of this application is entitled to the benefit of the filing date of Serial No. 735,743, filed July 18, 19%. i

The inventions of the present application relate to novel details of bus bar insulating and supporting means and these details can best be understood in connection with the appended drawings. in these drawings,

Figure l is a transverse sectional view of a bus-duct showing an arrangement using pedestal 20 type insulators, instead of the flat base type insulators heretofore shown in application Serial No. 31,296;

Figure 2 shows a bus bar supported on a pedestal type insulator;

Figure 3 is a cut-away fragmentary plan view of ,a bus-duct showing bus bars supported on relatively staggered pedestal type insulators;

Figures 4, 5, 6, 7, 8, 9, i0, 11, 12 and 13 show alternate arrangements of bus bars on pedestal type insulators.

In Figures 1, 2 and 3 there is shown an arrangement employing pedestal type insulators 50 for supporting three bus bars in a bus-duct. The insulators may be positioned in the bus-duct in staggered relation, Figure 3, for promoting space economy, and each pedestal is bolted to the lower section half by bolts 5|, whose heads are sealed from the upper surface of the pedestal by gobs of sealing wax 52 in counterbores of the pedestal. Bolts 53 project upwardly from each pedestal and have their heads sealed from the section half upon which the pedestal is placed by gobs 54 of sealing waxin counterbores of the pedestal. When a pedestal is to support one bus bar only, as in Figures 1-3, the pedestal is provided with a lower U-shaped clip 55, through which passes the bolts 53. The bus bar 24 is laid in one' portion of the clip 55, adjacent the bolt 53, and 'an'upper U-shaped clip 56 is positioned on the bolts to receive the upper edge of the bus bar.

A spacer 51 of the size of the bus bar is'positioned in the other portions of the clips -56 and a nut 58 is threaded down on each bolt 53 55 to complete the assembly.

(oi. its-31s) If desired, the spacer 51 may be replaced by another bus bar, as, for example, when it is desired to utilize two bus bars for each pole of the system.

. 53 measuring the capacity of the pedestal type 15 insulator.

figure 5 shows a pedestal type insulator supporting four bus bars. In this case, each of the clips (32 has two pairs of spacer lugs 63, and these are utilized in substantially the fashion 2o shown.

Figure 6 shows a pedestal type insulator arranged with its major axis traversing the bus bars, instead of running along the bus bars, for the purpose of enabling the single pedestal to. 25 support as many as six bus bars; the clips 6t used in this case each have three pairs of spacer lugs 65.

In Fig. 7,. a pedestal type insulator is shown as supporting a bus bar laid flat on the pedestal, 30 being spaced therefrom by a spacing insulating washer 56. It is observed that as many bus bars as desired may be utilized in this fashion, being placed one uponthe other, depending upon the length of the bolts 53 and the number of 35 washers 65.

Figure 8 shows a pedestal type insulator used to support two bus bars which are of channeled cross-section, the assembly including wide clips 61 to accommodate the channel-shaped bus bars. In this case it is intended that both bus bars form one pole of a multiple bus duct.

Figure 9 shows a pedestal type insulator arranged with its major axis transverse of the bus bars, so that the pedestal may support two channel-shaped bus bars on insulating washers 58; the bus bars are spaced from each other and may be of the same or opposite polarity as desired.

Figure 10 shows a pedestal type insulator supporting four bus bars which are assembled to form what amounts to a hollow conductor of square cross-section. In this case wide clips 69 and insulating washers 10 are utilized as shownf 55 15 reducing the induction effect.

The value of this arrangement lies in the fact that it provides maximum current capacity per unit of bus bar' cross-sectional area, for, as is well known, in a large capacity conductor, most 5 of the current is carried by the outside portion of the conductor.

Figure 11 shows an arrangement for substantially the same purpose, but wherein only three bus bars are utilized, the clips H and 12 serving to wedge all three bus bars into a tight assembly.

Figure 13 shows a pedestal type insulator having bolts 14 ofiset from the centerline of the insulator to receive between them a bus bar 15, there being a clamping plate 16 traversing the bus bar and clamped by the nuts of the bolts. This arrangement requires no spacer, such as is shown at 51, Figure 2, and is very satisfactory for an odd number of bus bars. If three or more bus bars be used, two or more of them may be on the outside of the bolts, and the remaining one disposed as shown.

If desired, the holes in the pedestal, receiving the bolts, may be formed as slots, in which case," the bolts may be positioned on center, as in Figure-2, or of! center, as in Figure 13, at the option of the installer of the system.

Now having described novel details and arrangements of bus bar insulator and supporting means of the bus duct shown in this application reference will be had to the following claim which determines the scope of the inventions of this application.

What I claim is:

An electrical distribution bus-duct having an elongated bus run spaced from a wall of the elongated duct, bus run supports comprising a plurality of separate spaced identical insulator pedestals disposed against that wall, each pedestal having a pair of bolts projecting from one surface thereof and through that wall of the duct, for securing the pedestal to that wall, with each bolt having its head embedded within the pedestal, each pedestal having means for securing the bus run to the pedestal, comprising a pair of bolts projecting from a surface of the pedestal opposite the first mentioned surface, with each of these bolts having its head embedded within the pedestal, the line connecting each pair of bolts being .transverse to and intersecting that connecting the other pair of bolts, and being between the other pair of bolts.

WILLIAM H. FRANK.