US1760895A - Disconnecting choke-coil switch - Google Patents

Description

June 3, 1930. p, BOLL ET AL 1,760,895

' DI SCONNEQTING CHOKE COIL SWITCH Filed Jl l'lyt 2?, 1927 Patented June 3', 1930 PATENT OFFICE VL ESTER PIERCE BOLL, F MAPLEWOOD, AND ARNOLD CLEMENT HANSEN, JR., OF ST. LO'UIS, MISSOURI, ASSIGNORS T0 W. N. MATTHEWS CORPORATION, OF ST. LOUIS,

MISSOURI, A. CORPORATION OF MISSOURI DISCONNECTIHC-l CHQKE-COIL SWITCH Application filed. July 27,

This invention relates to switches, and with regard to certain more specific features, to choke coil switches for use in electric circuits or lines.

Among the several objects of the invention may be noted the provision of an improved switch incorporating in the disconnecting hinging element thereof a choke coil; the provision of a device of the class described in which the choke coil switch member may be readily removed for purposes of repair; and the provision of hanger means for supporting said choke coil switch in combination I with a fuse switch or other switch element. Other objects will be in part obvious and'in part pointed out hereinafter.

The invention accordingly comprises the elements and combination of elements, features of construction, and arrangements of parts which will be exemplified in the structure hereinafter described, and the scope of the application of which will be indicated in the following claims.

In the accompanying drawings, in which are illustrated two of various possible embodiments of the invention,

Fig. 1 is a side elevation of one form of the invention;

Fig. 2 is a cross section on line 22 of Fig. 1;

Fig. 3 is an enlarged plan view of a hinge member; and,

Fig. 4 is an enlarged a contact assembly.

Corresponding reference characters indicate corresponding parts throughout the several views of the drawings.

Referring now more particularly to Fig; 1, there is illustrated at numeral 1 an 4 S-shaped channel iron support adapted to be fastened to a cross arm 3 by a shackle 5,

the legs of which shackle pass through the web of the channel support. The legs 7 and 9 of the support are of such length as to 45 hold insulators'll, 13 and 15 sufiiciently far perspective view of 1927. Serial No. 208,709.

apart to permit the location of a choke coil assembly 17 and a fuse switch 19, substantially as shown. The three insulators are held to the support 1, at each end and at the lower interior angle by means of shackle clamps 21 and nuts 23. These insulators com-prise bell shaped porcelain bodies with grooves 25 adapted to receive the shackles 21. To the under sides of these insulators 11, 13 and 15 are aiiixed the brackets 27, 29 and 31 respectively. These brackets comprise pieces of channel iron bent to the form shown or, if more easily fabricated, iron castings. Their shape is indicated in the figure. In general, however, the lower end of bracket 31 should be lower than the corresponding lower end of 29, and in like manner bracket 29 should be lower than bracket 27 for ready manipulating purposes.

The bracket 27 is provided with a lug 33 adapted to support a contacting clip 35. Likewise, bracket 29 is provided with lugs 37 and 39 supporting contacting clips 41 and 43 respectively and bracket 31 is provided with a lug 15 supporting a contacting clip 47.

Each contacting clip comprises a pair of cooperating U-shaped spring members 49 held in contact with a terminal block 51 by means of a stud 53 (Fig. 4). The stud 53 serves also to hold the clip-block assembly 49, 51 to its respective arm 27, 29 or 31. Each inner spring member of the pair 49 is provided with a guiding flare 55. Below this flare is formed a pair of crimps 57 for purposes of holding the block or the like which is adapted to be positioned between the tines of the inner spring member.

Between the clips 41 and 47 and their respective ears 37 and are clamped open hinge members 59 and 61, respectively. These members 59 and 61 are held in position by means of the studs 53 of the clip-block assembly. The member 61 is more particw larly detailed in Fig. 3. It comprises a flat portion 63 adapted to cooperate with the end of its supporting arm, in which portion is formed an opening 65 for the insertion of the stud 53. A pair of wings 67 are provided to prevent twisting of the hinge member on its respective arm. Extending outwardly from said fiat portion 63 is provided a pair of legs 69 having each a lost motion recess 71, adapted to receive certain gudgeon pins 73 formed with the fuses or switch arms to be described.

In the lower pair of contacting clips 43 and 47 is removably mounted said fuse 19, which comprises, primarily, contacting blocks77 and 75 formed and adapted to engage the contacting members 43 and 47 (to be resiliently held therein by means of the crimps 57). The blocks 7 5 and 77 are mounted on an insulating tube 7 9 and are electrically connected by means of a fuse wire 81 or the like which passes through said tube. The fuse wire 81 passes out of the lower open end of the block 75. The block 77 entirely encloses its end of the wire 81. A bridge portion 83 is formed integrally with the block 77 for purposes of applying a tool thereto for removing and replacing the entire fuse block.

The upperpair of clips 41 and 35 together support said choke coil switch assembly 17. This assembly comprises, primarily, contacting blocks 85 and 87 similar in construction to the corresponding blocks 77 and 75 in the fuse assembly 19. The blocks 85 and 87 are adapted to engage the contacting members 35 and 41 and adapted to be resiliently held in place by means of the crimps 57 (see Fig. 4). The blocks 85 87 are mounted on a hardwood or other insulating bar 89. Aflixed to this bar 89 is a choke coil 91. The turns of this coil are spaced and held in position by hardwood or other insulating material cleats 93 and 95, which comprise two pieces held together at intervals by studs 97. To firmly atfix the choke coil 91 to the hardwood bar 89, a hardwood or other insulating cleat 99 is affixed to said bar 89 withstuds 101, holding the coil firmly between itself and bar 89.

The ends of choke coil 91 are fastened in clamps 103 and 105 (made of a conducting material), and are securely clamped by means of stud 109. These saddles 103 and 105 com- It is thus seen that the The clips 35 and 41 may be from the upper ends of said recesses. Next the fuse or coil is swung upwardly into position, whereby the proper portions of the blocks 75, 77 or 85, 87 are positioned between the tines 49 of the spring contacts. The lost motion recesses 71 permit of the proper amount of lay required for properly positioning the use in its contacts and at the same time permit of ready entry of the gudgeons 73 in their respective recesses. The line or other wires are put into electrical contact with the fuse by fastening them at the screw sockets 107.

It is evident that the ridges 57 prevent either the fuse or coil from falling out of the clips. The supporting legs 69 prevent falling of the fuse or coil even though either should be loosened from its contacts by some external force. The fuse, or coil, can only be removed from the hanger by manually and forcibly pulling it down and lifting it from the member 63. This comprises a controlled action, not one which would be likely to occur accidentally. \Vhen the fuse blows, burned gases and the like are engendered and are projected from the lower open end thereof, with the result that there is a tendency for the fuse block to be projected or rocketed upwardly and longitudinally out of the spring clips. The reason for clearing the fuse of gases is not a part of this invention per se and is therefore not described in detail. With the present construction this projecting possibilit is guarded against, because the legs 69 o the hinge member are positioned across the path of incipient movement of the gudgeons 73.

The purpose of the choke coil is to prevent the passage of undesirable high frequency surges, and to throw them back on the line where they are discharged to the ground through a lightning arrestor (not shown). At ordinary commercial frequencies the choke has practically no retarding action, and functions as an ordinary conductor. The fuse cartridge provides a further safeguard to the line. Both the choke coil and the fuse are easily removed from the supports, and new ones can equally easily be substituted therefor. The combination of fuse and choke coil can be made in practically any size to meet any current or voltage conditions.

One of the primary features of the invention is the combination in a single element of a choke coil and a disconnecting switch. These features have been so combined that when the switch is opened, then the choke coil is no more a portion of the line. The choke coil switch. may be entirely removed by removing the gudgeon 73 from legs 69 after the coil has been pulled down to open circuit position. This means that if any repairs are needed on the choke coil itself, that it may be worked upon without being in proximity or connected with the voltage line. This is a distinct advantage.

It will be notedthat a bridge portion 83 is also provided for the choke coil switch for the purpose of applying a tool thereto for re-' moving and replacing the coil switch.

In View of the above, it will be seen that the several objects of the-invention are achieved and other advantageous results attained.

As many changes could be made in carrying out the above constructions without departing from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

We claim:

1. The disconnecting choke coil switch comprising line terminals, spaced terminal engaging elements at least some of which are adapted to engage said line terminals and at least one coil supported between two of said terminal engaging elements and contacting them electrically, the support for said coil comprising insulating means between said two terminal engaging elements and within the coil adapted to hold said elements in spaced relationship, said two terminal engaging elements being electrically connected only through said coil,

2. In a disconnecting coil switch line terminals comprising conducting spring clips, spaced terminal engaging elements at least some of which are adapted to engage said clips and at least one choke .coil electrically connecting two of said engaging elements, said electrical connection being the only one between said two elements, and a spacer between said engaging elements, said coil surrounding the spacers 3. In a disconnecting coil switch line terminals comprising conducting spring clips, spaced terminal engaging elements at least some of which are ada ted to engage said clips, insulating means or maintaining two ofsaid engagin elements in predetermined spaced relationship and a conducting coil mounted on and around said insulating means and formin the only electrical connection between sai two engaging elements.

4. The combination of a choke coil switch and a fuse switch comprising a frame, insulators afiixed thereto, brackets aflixed to the insulators, contacting clips on the brackets adapted to resiliently hold at least two circuit closin' members, one of which comprises a fuse an the other of which comprises a choke coil switch; open hinge members adapted to permit hinging application of the circuit closing members, removal thereof, and to prevent longitudinal movement thereof when positioned in the said clips.

" 5. The combination of a choke coil switch and afuse switch comprising a frame, insulators held thereto, brackets connected to the insulators, contacting clips fastened to the brackets adapted to resiliently hold at least two circuit closing members, one of which comprises a fuse and the other of which com prises a choke coil switch, said fuse being held in water deflecting position.

In testimony whereof, we have signed our names to this specification this 25th day of July, 1927.

LESTER PIERCE BOLL. ARNOLD CLEMENT HANSEN, J n.

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