Патент USA US2405457код для вставки
Aug. 6, 1946. ‘A. T. ‘SINKS 2,405,457 COIL WINDING FOR ELECTRIC APPARATUS AND METHOD OF MAKING SAME Filed 0c'b..25, 1943 Inventor-z Allen "IT Sinks, H15 1 Attorfney. Patented Aug. 6, 1946 2,405,457 UNITED STATES PATENT OFFICE. 2,405,457 COIL WINDING FOR ELECTRIC APPARATUS AND METHOD OF MAKING SAME Allen T. Sinks, Beach Blu?, Mass, assignor to General Electric Company, a corporation of New York Application October 23, 1943, Serial No. 507,419 8 Claims. (0]. 175-35s) 1 2 the top of which is mounted the terminals of the transformer. Inside the winding space and be tween the spaced wall members there is provid high voltage instrument current transformer the porcelain walls inside the pot type porcelain manner. of the pot type insulator employed in the con My invention relates to a coil winding for an struction of Fig. 1; Fig. 3 illustrates my improved electrical induction apparatus and to a method method of winding the high voltage winding of of forming the coil winding. the transformer illustrated in Fig. 1; and Fig. 4 Heretofore it has been customary to form some types of electrical induction apparatus such as 5 is an exploded perspective view of a portion of the high voltage Winding employed in the con instrument current transformers with a tunnel struction of Fig. 1. type porcelain body which includes a tubular Referring more particularly to Fig. 1 of the shaped inner wall and a spaced outer wall form drawing, I have illustrated an electrical induction ing a winding space. The outer Wall usually ex tends into a relatively long tubular member on 10 apparatus which has particular application as a which includes a pot type insulator II) having a cavity II, at the bottom of which there is pro vided a tubular shaped wall I2 and a spaced bot ed a few turns of wire to form the primary wind ing of the transformer. Through the tunnel on 15 tom wall I3 providing a winding space Ill. The tubular shaped wall I2 is hollow so as to provide the outside of the porcelain is placed the core an opening or tunnel I5 through which extends winding leg and the low voltage secondary wind a winding leg I6 of a core in the conventional ing. It will be understood that the space between The core is formed in two halves with is relatively narrow and some difliculty has been 20 an outer yoke portion I‘! which connects with experienced in the past in winding the conduc tor around the inner porcelain body to provide the high voltage winding. This has usually been accomplished by taking an insulated conductor half of the winding leg I 6. The other half of the winding leg I6, it will be understood, con as to produce the high voltage winding. How ever, such prior methods have been susceptible of the pot type insulator through a metallic ?ange member I9 which is in turn attached to the in cracking or injuring the relatively hard surface sulator in any suitable manner such as by ce nects with a yoke similar to I‘! and on the oppo site side of the transformer. A base member I8 and working it around the inner body a su?icient 25 of suitable metallic material is provided which surrounds the core members and which supports number of times to form a plurality of turns so menting, as is indicated at 20. The top of the cavity I I is closed through a cover member 21 ally rather tedious and expensive. which is attached to the top of the insulator It is therefore an object of my invention to through a collar 22 which is in turn supported by provide an improved high Voltage primary wind a shoulder 23 of the insulator and is cemented, ing for a pot type current transformer of the 35 as is illustrated by the numeral 24. A pair of above mentioned type. terminals 25 and 26 are provided on the cover A further object of my invention is to provide which in turn connect to the high voltage pri an electric induction apparatus with an improved mary winding, the construction of which will be coil winding which is simple in construction and described below. Low voltage terminals 21 are e?icient in operation. provided which are supported by the base I8 A still further object of my invention is to pro which are connected to a low voltage winding vide an improved method for facilitating the 28 through a conductor 29. The low voltage forming of a high voltage Winding around a tu winding 28 surrounds the winding leg and is in bular body in the cavity of a pot type insulated side the tunnel I5. transformer. In order to provide an improved high voltage Further objects and advantages of my inven 45 winding arrangement, I provide a spool member tion will become apparent from the following de 30 which is split and which is formed of two semi scription referring to the accompanying drawing, cylindrical portions 3I and 32, as will be seen in and the features of novelty which characterize detail in the exploded View of Fig. 4. These mem my invention will be pointed out with particu larity in the claims annexed to and forming a 50 bers may be made of any suitable material and of the porcelain and such prior methods are usu part of this speci?cation. In the drawing Fig. l is a side elevation in par tial section illustrating a pot type instrument transformer which is provided with an embodi ment of my invention; Fig. 2 is a perspective view are formed of conducting material such as cop per for the reasons which will be apparent as the following description proceeds. The semi-cylin drical members 3| and 32 are placed around the ' tubular inner wall I2, as is illustrated in Figs. 1 2,d05,457 e) 4 and 3, with the abutting surfaces 33 slightly spaced and the surfaces as abutting. Suitable dowel pins which extend into holes 36 may be provided fOr properly positioning the semi-cylin drical members. In order that the spool will not of the rod 50 extends. The top- suriace of the tubular member 53 may be supported in any suit able manner, such as through a base 66 which in turn supports the rotatable wheels 65 which in turn cause the chains 46 to rotate. My improved method of forming the high volt provide a short-circuited turn around the Wind age winding around the tubular wall 12 at the ing legs, the split spool is provided with a' longi bottom of the cavity of a pot type insulator, there tudinal or axial discontinuity in the form of an fore, includes the steps of surrounding the tubu insulating member 37 which is placed between the adjacent surfaces at 33. 10 lar wall with the split spool with the conductor In order to provide a convenient arrangement for winding a conductor around the spool to pro attached. The chain is then assembled for rotat ing the spool. A suitable amount of thrust is thereby provided through the thrust member 59 so that when the spool is rotated it will move rela vide the high voltage winding, each of the semi cylindrical portions 3! and 32 forming the spool is provided with spaced ?anges 38 and 39 which 15 tively freely around the outer surface of the wall i2. After a suitable number of turns have been have gear teeth [it formed about the outer pe placed on the spool, the conductor may be cut riphery thereof. Any suitable conducting mate and an end 55 attached to a conductor 55 which rial may be provided for the high voltage wind ing and in the construction illustrated it will be I in turn connects to the terminal 25 or the con seen that the high voltage conductor is in the 20 duotor M may continue up to and be attached to the terminal 25. form of a relatively wide and thin copper strip In order to provide the high voltage winding 4| which is wound off a suitable spool of the ma with another terminal, the terminal 26 is con terial 42. An end of the copper conductor 4| is at nected to the inner end of the high voltage wind» tached to the spool in any suitable manner, such as by welding, as is indicated by the numeral 43. 25 ing through the spool. This may be accomplished in any suitable manner such as by providing a This connection may be made between the con~ conductor lead 56' which has an inner end brazed. duotor and the member 3! before the semi-cylin to the spool. It will be seen, particularly in Fig. drical members are inserted in the porcelain. 4, that both the semi-cylindrical members have wound on the split spool, the semi-cylindrical 30 on each of the ?anges relatively flat portions 57 and, in order to facilitate the connection, a strap members will be held together by the conductor. member 53 may be provided which bridges across As the spool is wound up, interturn insulation the ?at portions 57!. The strap 53 has depending may be provided between the turns of the con~ legs 59 of suilicient length, which. is slightly duotor by a suitable sheet of insulating material 114 which is wound off a spool 45. 35 longer than the thickness of the high voltage winding, so the outer convolutions will not touch In order to rotate the spool around the inner the strap member 58 or are across during opera wall !2, I provide chain members 46 which mesh tion. Taped holes are provided in the flat por with the sprockets or teeth Iii! on the peripheral tions 51, and suitable screws 50 attach the strap flanges of the spool. It will be understood that a pair of continuous chains may be employed which 40 member to the axially spaced ?anges of the semi cylindrical portions 3!. This strap member pro— mesh with each of the sprockets lit, only one of vides a convenient place for attaching an end 5! which, however, is shown in Fig. 3. It is also of the conductor 55, as is illustrated in Fig. 1. to be understood that chains cooperate with suit It will be understood that the screws may be at able tooth wheels 55 which may be rotated by a Also, as soon as one turn of the conductor is suitable source of power (not shown) so as to rotate the spool. Thus by rotating the spool the tached to the flat portions 51 by inserting a screw driver in the opening H of the porcelain when the spool is in position with the flat portions 51 copper conductor 4! with its insulation 44 will be facing upwardly. After the strap is assembled. wound around the tubular portions of the semi the spool may be rotated a quarter of a turn so cylindrical members 3! and 32, thus providing a continuous coil of concentric convolutions. It is 50 that the leads are attached to the winding sub stantially symmetrically. In. order to hold the to be understood that the spool is su?iciently large high voltage winding snugly in the porcelain so as to be able to rotate around the outer surface after assembly of the winding, a suitable ?lling of the wall l2 and, to indicate this, there is shown compound may be put in the cavity H, as indi a slight clearance between the wall l2 and spool 39. 55 cated by the line 62. Although I have shown and described particu In order to minimize binding between the inner lar embodiments of my invention, I do not desire surface of the spool and the outer surface of the to be limited to the particular embodiments de wall 92, I provide a thrust member 59 which in scribed, and I intend in the appended claims to cludes a rod having a pair of rollers 59 and 52 which roll on the outer surface of the spool and 60 cover all modi?cations which do not depart from the spirit and scope of my invention. on the convolutions of the conductor as the con— What I claim as new and desire to secure by duotor is wound around the spool. Thus as the Letters Patent of the United States is: chain is rotated to produce a torque which in turn 1. An electrical induction apparatus including rotates the spool, the spool will tend to be forced a pot type solid body of insulating material hav upwardly against the bottom surface of the wall integral inner tubular shaped wall and E2. Such rubbing, however, might tends to crack an integral outer wall spaced from said inner or injure the porcelain and in order to prevent wall providing a winding space between. said this, the thrust member 563 with the rollers is walls, a split spool of conducting material loosely provided which pushes downwardly with a force which may be made substantially equal to the 70 surrounding said inner wall, a conductor wound around said spool with the inner end attached upward force of the chain, thus allowing the spool to said spool, a pair of terminals, and means for to rotate relatively freely around the outer sur connecting one of said terminals to said spool face of the wall member Hi. This force is ac complished through a spring member 52' which and the other of the terminals to the outer turn is inside a tubular member 53 into which an end 75 of said wound conductor. 2,405,457 5 2. An electrical induction apparatus including a solid ‘body of insulating material having a tu bular inner wall and a spaced outer Wall provid ing a winding space, a spool of conducting mate rial surrounding said inner wall, a conductor wound around said spool to form a winding, means for connecting the inner end of said con 6 to form a winding, said spool having axially spaced ?anges, means including gear teeth formed about they outer periphery of said ?anges for rotating said spool around said tubular Wall for forming said winding, and means for attach ing the inner end of said conductor to said spool. 6. An electrical induction apparatus including a body of insulating material having a tubular ductor to said spool to form one terminal portion inner wall and a spaced outer wall providing a for said winding, and means for connecting a conductor to the outer turn of said winding to 10 winding space, a pair of semi-cylindrical mem bers of conducting material loosely surrounding form another terminal. said inner wall to form a winding spool, a con 3. An electrical induction apparatus including ductor Wound around said spool to form a wind a solid body of insulating material having a tubu ing, said spool having axially spaced ?anges, lar inner wall and a spaced outer wall providing a winding space, a split spool of conducting ma 15 means including gear teeth formed about the outer periphery of said ?anges for rotating said terial loosely surrounding said inner wall, a con ‘spool around said tubular Wall for forming said ductor wound around said spool to form a wind winding, and means for attaching one end of ing, said split spool having an axially extending said conductor to said spool, a conducting bar discontinuity so that it will not form a short circuited turn, one end of said conductor being 20 bridging said ?anges of said spool, a terminal, and means for connecting said terminal to said attached to said spool so that said spool forms bar. . one terminal portion for the winding. 7. A winding for an electrical induction appa 4. An electrical induction apparatus including ratus including a spool of conducting material, a body of insulating material having a tubular inner wall and a spaced outer wall providing a 25 a conductor wound around said spool in layers with the inner end connected to said spool, means winding space, a, pair of semi-cylindrical mem including said spool for providing one terminal bers of conducting material loosely surrounding connection for said winding, said spool having said inner wall to form a winding spool, means spaced ?anges with gear integral teeth on the for insulating adjacent surfaces of said members, outer periphery thereof to provide means through a conductor wound around said spool to form a which said spool may be rotated to wind on said winding, said spool having axially spaced ?anges, conductor. means including gear teeth formed about the 8. A method of forming a coil winding around outer periphery of said ?anges for rotating said a tubular wall at the bottom of the pot type in spool around said tubular wall for forming said winding. 5. An electrical induction apparatus including a body of insulating material having a tubular inner wall and a spaced outer wall providing sulated transformer including the steps of plac ing two semi-cylindrical metallic members in the cavity around the tubular wall to form a wind ing spool, placing a chain in the cavity around the spool for rotating the spool, rotating the a winding space, a pair of semi-cylindrical mem bers of conducting material loosely surrounding 40 spool, and placing a thrust member in the cavity and against the spool to prevent the spool from said inner wall to form a winding spool, means binding on the wall during rotation of the spool. for insulating adjacent surfaces of said members, a conductor wound around said spool in layers ALLEN T. SINKS.