US755141A - Electrical switch mechanism. - Google Patents

Description

No. 755,141." PATENTED MAR. 22, 1904. 11.. KRANTZ,

ELECTRICAL SWITCH MECHANISM. 7 APPLICATION FILED mm: 29. 1903.

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3 ii: I fj I 7717671357; gi ig 4464; 75w? No. 755,141. PATENTED' MAR. 22, 19042 H. KRANTZQ ELECTRICAL SWITCH MEGHANISM. APPLIOATION FILED JUNE 29, 190s.

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PATENT OFFICE.

HUBERT KRANTZ, OF BROOKLYN, NEl/V YORK.

ELECTRICAL SWITCH MECHANISM.

SPECIFICATION forming part of Letters Patent No. 755,141, dated March 22, 1904.

Application filed June 29, 1903.

ToaZZ whom it may concern.-

Be it known that I, HUBERT KRANTZ, a citizen of the United States, residing in the borough of Brooklyn, county of Kings, in the State of New York, have invented Improvements in Electrical Switch Mechanism, of which the following is a specification.

This invention relates to electrical switching mechanism, and more particularly to the arrangement of bus-bars and cross-bars, their electrical connection with each other, and the contacts of the cross-bars and switches.

By my improvements I mount the crossbars edgewise above the bus-bars in such manner that the edge of the cross-bars may form the contact parts for the switches and, if desired, may be flush with the bus-bars. This allows a saving of considerable material over prior devices, as I may carry these cross-bars the necessary distance above the bus-bars for safety instead of lengthwise away from the same. Moreover, the supports of the crossbars act at the sametime to make the proper electrical connection between the busbars and the cross-bars.

My improvements may be applied to various forms of switching devices; but I have shown in the drawings, by way of example only, a switchboard or panel-board similar to that shown in Patent No. 693,550, granted to me on February 18, 1902. I do not limit this invention to this form of switching mechanism, however, nor to any specific form or construction shown other than what is particularly called for in the claims hereto appended.

In the accompanying drawings, Figure 1 is a face view of one form of switching mechanism to which my improvements may be applied, some of the parts being omitted as unnecessary for a proper showing of my inven tion. Fig. 2 is a sectional view taken on line 2 20f Fig. 1. Fig. 3 is a sectional view taken on line 3 3 of Fig. 1. Fig. 4 illustrates the blank for forming one of the middle crossbars shown in Fig. 1. .Fig. 5 is a side view of this bar when bent up into the shape shown in Fig. 1. Fig. 6 illustrates the blank for forming one of the end cross-bars. Fig. 7 is an end View of one of the end bars after helng bent into shape for use.

Fig. 8 is a face Serial No. 163,482. (No model.)

view of a portion of a switchboard, illustrating a modification. Fig. 9 is a sectional elevation of Fig. 8. Fig. 10 is a face view of a portion of a switchboard, illustrating the connections for a threewire switch. Fig. 11 illustrates the blank for forming one of the cross-bars shown in Fig. 10. Fig. l2is a side view of this blank bent up. Fig. 13 is a section taken on line'13 13 of Fig. 12. Fig. 14E illustrates an arrangement such as shown in Fig. 10, having additional pieces applied to the cross-bars to act with single-blade switches, as hereinafter explained. Fig. 15 is an end view of the cross-bars and adjacent parts shown in 'Fig. 14.

Figs. 1 to 3 illustrate the insulating baseplate A, carrying the bus-bars B B, which preferably rest directly upon plate A and crossbars C C C (J C mounted. edgewise above the bus-bars. The supports for holding the cross-bars in position are preferably formed in one with the cross-bars.

Fig. 6 illustrates the blanks used to form the end cross-bars G and C The portion 1 is bent into an-L, as shown in Fig. 7, and the lower arm secured, as by screws, soldering, &c.,.to bus-bar B, Figs. 1 and 2. The L porti on 2, forming the cross-bar proper, (C or C t) a safe distance fromthe bus-bars, whereby the ends of the portion 2, while preferably coming flush with the bus-bars, may form the contacts for the switches, such as shown at D in Figs. 1 and 2. Two switches only are shown for clearness. The portion 3 of blank 0, Fig. 6, passes down into a groove in an insulatingblock E, resting on the bus-bar B, that may be used for steadying the end of the bar not connected to the bus-bar.

From the foregoing it will be understood that the portion 1 of cross-bars C and G acts in two capacities-first, to hold the cross-bars edgewise above the bus-bars, and, second, to make the proper electrical connection between the cross-bars and bus-bar B Fig. 4: illustrates the blanks for forming the cross-bars C C C". The portions 1 and 6 are bent U-shaped, as shown in Fig. 3. The U portion a is deeper than the other and adapted to be connected to one of the bus-bars B or tion 1 is made high enough to raise the por- B, according to position, and the more shallow U portion 6 is adapted to rest upon an insulating-block E, Figs. 1, 2, and 3, placed between the busbar and cross-bar. The crossbars C O are thus also supported by the means for making the electrical connection with the bus-bars, and the ends of the U portions iand 6 form the contacts for the switches. The main ideas of this arrangement are to carry the cross-bars edgewise above the busbars and make the supports act at the same time as electrical connections, so that it will be evident that various ways of accomplishing these objects may be used other than shown in Figs. 1 to 7 To illustrate, in Figs. 8 and 9 the cross-bars 0 C may be flat strips of copper, and the electrical connecting-supports may consist of angle-pieces F F, of suitable conducting material, to which the cross-bar strips are secured, as by riveting, soldering, 620. Also instead of the steadying-blocks E E of Figs. 1, 2, and 3 I may use angle-pieces G G, riveted to the cross-bars out of the way of the bus-bars and reaching down and secured to the base-plate A. The angle-piece G for the end bars are L-shaped, and the angle-pieces G are U-shaped to support two of the middle cross-bars.

It will be readily understood that a construction having the cross-bar and its support in one, as in Figs. 1 to 7, could have one of the steadying-pieces G or G also in one,with it to reach to the base-plate out of the way of the bus-bars.

Fig. 10 illustrates an arrangement of switching mechanism for a three-Wire main and two- Wire branches,in which it will be seen that current can be supplied to eight different switches by means of but two full cross-bars C and C The blank for forming the cross-bar G (or (1 is shown in Fig. 11. The portions 7 and 10 are bent up in the same manner as portion 6 of Figs. 4 and 5*that is, these U-shaped ends of cross-bar C or C are adapted to rest upon insulating-blocks E between the cross bar and the positive and negative bus-bars B and B The portion 9 is bent into an L, as shown in Figs. 10, 12, and 13, the horizontal part of which is to be connected to the neutral bus-bar B The tops of the U-shaped pieces formed by portions 7 and 10 of each cross-bar C or C form the contacts for four switches for connection to the neutral bus-bar B while in this arrangement the contacts for the positive and negative bus-bars B and B are formed by angle-pieces H and H, the pieces H for the end connections being L-shaped and those for the middle connections H being U- shaped.

' Referring to Figs. 14 and 15, it will be seen that by the addition of angle-pieces, L-shaped pieces M for the end connections,and U-shaped piecesNfor the middle connections the crossbar contacts can be made with single-blade switches, such as shown at P, Fig. 14:. The arrangement here shown is similar to that shown in Fig. 10, the blade of the switch passing down between the uprights II and H, N and C", &c. It will be clear that these additional pieces M and N may be applied to the other arrangements shown.

I claim as my invention 1. In electrical switch mechanism, the combination of bus-bars, approximately flat crossbars and switches, with means for supporting said cross-bars edgewise to said bus-bars, said means adapted to make electrical connection between said cross-bars and bus-bars, and the ends of said cross-bars forming contacts for said switches.

2. In electrical switch mechanism, the combination of switches, bus-bars, andv approximately flat cross-bars the ends of which form contacts for said switches, with means for supporting said cross-bars edgewise to said busbars and at a distance therefrom to permit the ends of the cross-bars being approximately flush with the bus-bars, said means also adapted to make electrical connection between said cross-bars and bus-bars.

3. In electrical switch mechanism, the combination of bus-bars, and switches, with an approximately flat cross-bar adapted to be supported edgewise to said bus-bars, and electrically connected to one of said bus-bars, said cross-bar being provided with U-shaped ends forming four contacts for said switches.

i. In electrical switch mechanism, the com bination of bus-bars, with an approximately flat cross-bar supported edgewise to said busbars, said cross-bar being provided with U- shaped ends, one of which is secured. to one of said bus-bars to support the cross-bars edgewise to, and make electrical connection with, said bus-bar.

5. In electrical switch mechanism, the combination of a base-plate, and bus-bars resting thereon, with approximately flat cross-bars provided with angle-pieces adapted to make electrical connection with said bus-bars and support the cross-bars above and edgewise to said bus-bars.

6. In an electrical switch mechanism, the combination of a bus-bar, with a cross-bar comprising a flat strip having a portion projecting therefrom, the end of said portion being bent at an angle and connected to said busbar, whereby the body of the cross-bar is electrically connected to said bus-bar and supported edgewise thereto.

In testimony whereof I have signed my name to this specification in the presence of two sul scribing witnesses.

H. KRANTZ.

Witnesses:

E. KENNA, JOSEPH A. NEWTON.

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