US1235081A - Reactance-coil. - Google Patents

Description

P. TORCHIO & H. R. WOODROWL REACTANCE COIL.

APPLICATION HLED MAR-15.1917.

Patented July 31, 1917.

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REACTANCE C0lL. APPLICATION FILED MAR. 15, 1917.

Patented July 31, 1917.

2 SHEETSSHEET 2.

A Wk W wwswwixgy PINVENTQRST 7 D WW BY m fiw m MTTORNEY UNITED STATES PATENT OFFICE.

PHILIP TORCHIO AND HARRY R. WOODROW, OF NEW YORK, N; Y., ASSIGNORS 'I'O THOMAS E. MURRAY, OF NEW YORK, N. Y.

4 REACTANCE-GOIL.

lowing is a specification.

The invention relates to reactance coils for high tension voltage. Such co1ls are commonly used in series with hlgh speed alternating current generators to limit the instantaneous inrush of current under short circuit conditions, thus relievlng the generator winding. from abnormal stresses, and

facilitating the parallel operation of other generators and synchronous the system.

.The invention consists, first, in the construction of the individual coils and the transposition of the conductors in the windings thereof, and, second, 1n the construction apparatus in of the casing wherein said coils are supported and inclosedall as more particularly hereinafter set forth.

In the accompanying drawings- Figure 1 is a perspective view of our reactance coils, with portions broken away to show the internal construction. Fig.2 is a face view ofone of the coils, showing also the vertical spacing bars in dotted lines.

Fig.3 is a top view of the coils, showing the spacing bars inplace. Fig. 4 is a vertical sec- Y tion on the line as, w of Fig. 1. Fig. 5 is a diagonal section on the line 1 y ofFig. 1. Fig. 6

shows the coils invertical section, with the windings somewhat separated to exhibit the winding connections. Fig. 7 is an enlarged vertical section of the top. portion of the coils'and spacing bars on the'line a, a of Fig. 3. I

Similar numbers and letters indicate like parts.

Referring first to Fig. 6: A, B, C, D, E represent five coils of the so-called .pancake type, formed of flat strips of conducting material covered with. insulation. Each coil has five windings, 1, 2, 3, 1, 5. The innermost winding 1, which is nearest of reference the center of the coil, is here shown with seven turns; the winding 2 with six turns; the winding3 with five turns; the winding 4 with four turns, and the outermost winding '5 with three t rns. These particular numbers of turns in the several windings Specification of Letters Patent.

Patented. July 31. 1917.

Application filed March 15, 1917. Serial No. 155,064.

' 1 of coil B, and winding a of coil B to wind ing 5 of coil A. The windings 1, 2, 3, 4 of coil A are connected respectively: to windings 2, 3, 4:, 5 of coil E. The unconnected terminals of windings -1 of coils A, B, C, D, E are all connected to the bent over end portion F of a metal lead G, and the unconnected terminals of windings 5 of said coils are all connected to the bent over end portion H of a metal lead I. The several coils A, B, C, D, E are thus connected in multiple with the leads G, I. There are as many pancake coils A, B, G, D, E as there are conductors, and every conductor is wound in every coil.

The number of turns of the several windings decrease from the center to the circumference of the coils, and, generally, this number is to be so determined as that the drop of potential in each winding shall be the same. This is illustrated by making, as already explained, the inner windings 1 of seven turns, with the turns of the other windings successively decreasing finally to three turns in the circumferential windings 5. By reason of this construction and bepotentials, obviates the use of insulating partitions between the coils, requires less copper, and lnvolves less losses in attaining 'the same reactance value.

lel walls 12, 13 of porcelain. Between said walls and at the upper corners of the same are interposed twoseries of porcelainblocks one of said series being numbered '14, .15,

. register with the corresponding edges of the 16,17, 18, 19. The outer edges of said blocks walls 12, 13. The inner corners of blocks 15, 16,, 17', 18 are suitably formed to it against the circumferential periphery ofthe coils. The blocks 14, 19; at the ends of the series at their inner corners havecintegral H arms 20; 21, Fig. 5, which extend overthe outer faces of coils A and E.

Between said walls 12, 13 and at the lower corners of the same are interposed two series of porcelain blocksone'of-said series being numbered 22, 23, 24, '25, 26, 27. The

outer edges of said. blocks register with corresponding edges of the walls 12, 13, and the inner corners of blocks 23, 24, 25, 26 are suitably formed to fit against the circumferential periphery of the coils. The blocks 22, 27 of both series at their corners have integral arms 29, 30, similar to arms 20, 21,

which also extend over the outer faces ofcoils A and E, and between said facesand the Walls 12 and 13. Headed bolts 31, preferably inclosed in insulating tubes, extend may be. slidpanels 33, Fig. 1,. for closing the rectangular space. between said upper and lower blocks and said walls 12, 13. In the opposite faces ofthetwo series of interposed blocks above the coils are grooves which receive wooden bars 34, and in the opposite-facesof thetwo series of interposed blocks below the coils are grooves which receive wooden bars 35. There are intervals between said bars to provide for the ventilation of the inclosed coils, due to the natural draft induced by the radiated heat from the windings. j The leads G, I are inclosed in quadrangular bushes 36, 37, of insulating material. The inner wall of each bush is cut away to form .a shoulder, which shoulders rest upon two of thebars 34. The lead G'extends through the channel between the, three remaining bush walls; the lead I does not, because the horizontal bent portion H of lead I connects, as already explained, with windings 5, while the horizontal bent portion F of lead G connects with windings 1 of coils A, B, C, D, E.

We claim:

1. A reactance apparatus, comprising a plurality of parallel coils in pancakeform connected in multiple, each coil comprising a plurality of concentric windings, there being as many of said pancake coils as there are conductors in said windings, and each co nlductor being wound in every pancake co1 2. A' reactance apparatus, comprising a plurality of parallel coils in pancake form connected in multiple, each coil comprising a plurality of concentric windings; the said windings being interconnected so that the potential between the terminals of each coil shall be equally distributed among the .ter-- minals of the several windings composing said coil. 4 V I 3. A reactance apparatus, comprising a plurality of parallel coils in pancake form connected in multiple, each coil comprising a plurality of concentric windings; the turns of said windings decreasing in number from the inner to the outer winding, whereby the potential between the terminals of each coil shall be equally distributed among-the terminals of the several windings composing said coil.

4. A reactance apparatus, comprising a casing, comprising two rectangular walls of 99 insulating material, and between said walls a plurality of parallel coils in pancake form and four series of parallel spacing blocks, the said blocks being symmetrically disposed around said coils and having their exposed faces registering with the edges of said walls adjacent to the angles thereof, and

means for clamping together said blocks said walls adjacent to the angles thereof,

two outer blocks of each series having inwardly projecting arms extending over the outer faces of the outer coils, and means for clamping together said blocks and said walls. 6. A reactance apparatus, comprising a casing, comprising two rectangular walls of insulating material, andbetween said walls a plurality of parallel coils in pancake form and four series of parallel spacing blocks, the said blocks being symmetrically disposed around said coils and having their exposed faces registering with the edges of said walls adjacent to the angles thereof, means for clamping together said blocks and said walls, and removablemeans for closing the openings between the members of two pairs of said four series of spacing blocks.

.7. A reactance apparatus, comprising a casing, comprising two rectangular walls of insulating material, and between said walls a plurality of parallel coils in "pancake form and four Series of parallel spacing. blocks, the said blocks being symmetrically disposed around said coils and having their exposed faces registering with the edges of said walls adjacent to the angles thereof, means for clamping together-said blocks and said walls, and a sliding panel'received in grooves formed in the members of two pairs of said four series of spacing blocks for closing the opening between said members.

8. A reactance apparatus, comprising a plurality of parallel coils in pancake form,

, parallel spacing bars of insulating material.

between said coils, and a casing for said coils having openings communicating with the' g spaces between said bars, whereby a ventilating air current due to the heat radiated from said coils is caused through said openings and said air spaces.

9. A reactance apparatus, comprising a plurality of parallel coils in pancake form, parallel spacing bars of insulating material between said coils and protruding beyond the circumferential peripheries of said coils, spacing blocks of insulating material interposed between the protruding ends of said bars, and pins extending through said spacing blocks and said bars.

In testimony whereof we have afiixed our 30 signatures in presence of two witnesses.

PHILIP TORCHIO, HARRY R. WOODROW. Witnesses:

GERTRUDE T. PORTER, MAY'T. MCGARRY;

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