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Publication numberUS3845435 A
Publication typeGrant
Publication dateOct 29, 1974
Filing dateJan 2, 1974
Priority dateJan 2, 1974
Also published asCA1000841A1
Publication numberUS 3845435 A, US 3845435A, US-A-3845435, US3845435 A, US3845435A
InventorsGeorgopulos T
Original AssigneeGte Automatic Electric Lab Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Loading coil packaging arrangement
US 3845435 A
Abstract
A coil tray assembly is provided which not only permits a number of loading coils to be more easily packaged, but further permits coil cases of various standard sizes to be constructed using the coil trays. The coil tray is a molded L-shaped plastic tray with either twelve or thirteen terminated coil assemblies inserted and potted therein with an encapsulating compound. This basic coil tray assembly can be used in the construction of either a 6 inch square, 11 x 6 inch rectangular or a 11 inch square coil case. Provisions for wire-wrapped termination of cable leads to coils instead of using special connectors and lead out wires also are provided. Further still, greater coil density with coil cases is possible, and the spaced and orientated coils within the trays eliminate the need for crosstalk plates and/or production tuning of the coils.
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Description  (OCR text may contain errors)

United States Patent Georgopulos Oct. 29, 1974 [54] LOADING .COIL PACKAGING ARRANGEMENT Primary Examiner-Thomas J Kozma [75] inventor: Thomas Georgopulos, Chicago, Ill. Attorney Agent or FlrmTDal/ld Held [73] Assignee: GTE Automatic Electric llzlzlzplil'pitlgziem Incorporated, 5 ABSTRACT A coil tray assembly is provided which not only per- [22] Wed 1974 mits a number of loading coils to be more easily pack- [21] Appl. No.: 430,271 aged, but further permits coil cases of various standard sizes to be constructed using the coil trays. The coil tray is a molded L-shaped plastic tray with either [52] Cl d $5 47 twelve or thirteen terminated coil assemblies inserted [51] Int Cl 15/02 and potted therein with an encapsulating compound. [58] Fie'ld 92 This basic coil tray assembly can be used in the con- 178/45 5 2 struction of either a 6 inch square, 1 l X 6 inch rectan- CP R gular or a 11 inch square coil case. Provisions for wire-wrapped termination of cable leads to coils in- [56] References Cited stead of using special connectors and lead out wires also are provided. Further still, greater coil density UNITED STATES PATENTS with coil cases is possible, and the spaced and orien- 2,079,697 5/l937 Rtil'igCS 336/l80 tated coils within the trays gliminate the need for g t l I; crosstalk plates and/or production tuning of the coils. yCI'S e a I FOREIGN PATENTS OR APPLICATIONS 6 Claims, 15 Drawing Figures 407,492 12 /1924 Germany 178/46 PM-Emmmmw 3.845485 SHEET 2 BF 4 I FIG. 8

l i l I l l l I I ,FIG. 11

FIG. 10

PATENIEDucr 29mm mama FIG-14' FIG-15 LOADING COIL PACKAGING ARRANGEMENT This invention relates to an improved loading coil packaging arrangement.

Loading coils are used in telephone communication systems for improving the electrical characteristics of the voice frequency cables. The number of loading coils may vary in any particular installationfrom, for example, 25 to 600 loading coils. These loading coils generally are mounted on or in trays of various different configurations, and then hermetically sealed in a coil case which is of a standard design and adapted to hold a number of these trays.

In accordance with the present invention, a new basic coil tray assembly is provided which not only permits a number of loading coils to be more easily packaged, but further permits coil cases of various standard sizes to be constructed using the coil trays. The coil tray is a molded L-shaped plastic tray with either twelve or thirteen terminated coil assemblies inserted and potted therein with an encapsulating compound. This basic coil tray assembly can be used in the construction of either a 6 inch square, I 1 inches X 6 inches rectangular or a I 1 inch square coil case. Provisions for wirewrapped termination of cable leads to coils instead of using special connectors and lead out wires also are provided. Further still, greater coil density with coil cases is possible, and the spaced and orientated coils within the trays eliminate the need for crosstalk plates and/or production tuning of the coils.

Accordingly, it is an object of the present invention to provide an improved loading coil packaging arrangement.

Other objects of the invention will in part be obvious and will in part appear hereinafter.

For a fuller understanding of the nature and objects of the invention, reference should be had to the following detailed description taken in connection with the accompanying drawings, in which:

FIG. I is a top plan view of the coil tray;

FIG. 2 is a sectional view taken along lines 22 of FIG. 1;

FIG. 3 is a sectional view taken along lines 33 of FIG. 1;

FIG. 4 is a sectional view taken along lines 44 of FIG. 1;

FIG. 5 is an end plan view of the coil tray of FIG. I;

FIGS. 6 and 7 are side and end plan views of the terminal used with the coil tray;

FIGS. 8 and 9 are side and end plan views illustrating the manner in which the coils are affixed to the terminals;

FIG. 10 is a top plan view of a coil tray with the coils loaded therein;

FIG. 11 is a sectional view taken generally along lines ll1l of FIG. 10;

FIG. 12 is a top view generally illustrating the manner in which the coil trays are loaded into a coil case;

FIG. 13 is a side view, partly sectionalized, to illustrate the manner in which the coil trays are loaded in the coil case of FIG. 12; and

FIGS. 14 and 15 are top views generally illustrating the manner in which the coil trays are loaded into two other standard coil cases.

Similar reference characters refer to similar parts throughout the several views of the drawings.

Referring now to the drawings, in FIGS. l-S, there is illustrated a coil tray 10 which is generally L-shaped in configuration and which has a number (12 in the illustrated embodiment) of semi-circular shaped cavities 12 therein for receiving loading coils. The coil tray 10 preferably and advantageously is molded of a thermoplastic material. As can be best seen in FIG. 11, the coil tray 10 also has side walls 14 extending about its perimeter, and the height of the side walls and the depth of the cavities 12 preferably are proportioned so that the loading coils 20 do not extend above the side walls. The spacing and the orientation of the loading coils within the cavities 12 in the coil tray 10 is such that the need for crosstalk plates and/or production tuning of the loading coils is eliminated. Adjacent to each of the cavities 12 there are a number of holes 16 for receiving therethrough the terminal pins 18 on a terminal block 21 described more fully below. It may be noted that an additional generally square-shaped, flat cavity 22 is formed in the coil tray 10, for receiving another loading coil 20 which lies flat in the cavity, rather than vertically disposed as in the case of the cavities 12. A hole 24 is provided through the coil tray 10, for securing a number of coil trays in stack relationship, on a rod in a coil case, as generally illustrated in FIG. 13. Also, a pair of slots 26 and 27 are formed on the ends of the two legs of the coil tray, for receiving therethrough alignment bars 28, as can be best seen in FIGS. 12 and 13.

In FIGS. 6 and 7, a terminal block 21 is shown as having a pin base 29 which may be molded of a thermoplastic material, with a number (4 in the illustrated embodiment) of terminal pins 18 integrally molded therein and extending from the opposite sides thereof.

As can be seen in FIGS. 8 and 9, the lead wires 31 of the loading coils 20 are connected to the terminal pins 18 of the terminal blocks 21.

After pre-assembling the loading coils 20 and the terminal blocks 21, as described above, the loading coils are placed in the cavities I2 and the terminal pins 18 are extended through the holes I6 in the coil tray 10, as can be best seen in FIGS. 10 and 11. Once all of the loading coils and their associated terminal blocks have been loaded into the coil tray 10, the coil tray is tilled with an encapsulating compound, so as to hermetically seal the loading coils in the coil tray and to complete the formation of a coil tray assembly. The encapsulating compound also servies to physically hold the loading coils in position in the coil tray 10. In use, the coil tray assembly will be turned upside down as it is inserted into the coil case. Connections to the loading coils 20 may be made on the bottom of the coil tray 10 since the ends of the terminal pins 18 extend through the coil tray. In FIGS. 10 and II, a load coil 20 is illustrated in the cavity 22.

As indicated above, these basic coil trays or coil tray assemblies are used in the construction of standard coil cases which may be, for example, 6 inches square, I l X 6 inches rectangular or I 1 inches square coil cases. In FIGS. 12 and 13, a 6 inch square coil case 41 is illustrated and it includes a rod 42 and two clamping or alignment bars 28. A cable 43 to which the loading coils 20 are to be coupled extends into the coil case. In assembling the coil case, a coil tray assembly is turned upside down and inserted in the coil case, with the rod 42 extending through the hole 24 in the coil tray and with the alignment bars 28 extending through the slots 26 and 27. Then, the cable pairs for this first coil tray are wire wrapped to the terminal pins 18 which project through the bottom of the coil tray. In a like manner, each successive ones of coil trays are inserted and the appropriate connections made. The upper or last one of the coil trays is secured in place by a plate 45 and a suitable holding fixture such as a nut and bolt 46. The completed coil cases are typically metal for environmental protection, since the coil cases will likely be buried in the ground or in manholes, possibly in water. The coil cases therefore need to be air tight. In some cases, the completed coil case may be filled with polyurethane or the like to protect the exposed wire wrapped connections.

In H0. 14, a 11 X 6 inch coil case 50 is illustrated and it can be seen that each level of coil tray assemblies includes two coil tray assemblies placed with the ends of two of the legs abutted together. In this case, the coil case 50 contains two rods 51 and 52, and four alignment bars 53-56 for securing and aligning the coil tray assemblies in the coil case.

ln FIG. 15, a l l inch square coil case 60 is illustrated and, in this case, each layer of coil tray assemblies includes four of them positioned to encircle a cable 61 to which the loading coils are to be coupled. Four rods 62-65 and eight alignment bars 6773 are provided for clamping and aligning the coil trays in the coil case.

In the case of both of the coil cases of FIGS. 14 and 15, the coil tray assemblies are loaded into the coil case and connections established with the loading coils, in the manner described above.

Accordingly, from the above description, it can be seen that an improved coil tray is provided which is of a basic design which permits it to be used in any one of several different types of standard coil cases. Furthermore, the construction and arrangement is such that the loading coils can be easily and quickly assembled in the coil trays, and when the coil tray assemblies are loaded into a coil case, that connections can be easily and quickly made with the exposed terminal pins 18.

It will thus be seen that the objects set forth above, among those made apparent from the preceding description, are efficiently attained and certain changes may be made in the above construction. Accordingly, 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.

Now that the invention has been described, what is claimed as new and desired to be secured by Letters Patent is:

l.- A coil tray assembly comprising, in combination: a coil tray molded of plastic material and having a plurality of spaced and oriented semi-circular shaped cavities therein for receiving loading coils and a plurality of holes adjacent each of said cavities for receiving therethrough the terminal pins of a terminal block, a terminal block having a base supporting a plurality of terminal pins such that said terminal pins extended from each of the opposite sides thereof, a plurality of loading coils having the ends of the windings thereon coupled with said terminal pins on one side of said base of said terminal block, said loading coils being positioned within said cavities in said coil tray and said terminal pins being extended through said plurality of holes adjacent said cavities so as to project from the bottom of said coil tray, and means hermetically sealing and positionally fixing said loading coils and said terminal blocks in said coil tray.

2. The coil tray assembly of claim 1, wherein said coil tray is generally L-shaped and has side walls about its perimeter, said side walls'being proportioned such that said loading coils do not extend above said side walls, thereby permitting said coil tray assemblies to be stacked one atop another.

3. The coil tray assembly of claim 2, further including an opening through said coil tray for receiving therethrough a clamping rod in a coil case, for securing said coil tray assembly in a coil case.

4. The coil tray assembly of claim 3, further including a slot on the end of each of the legs forming said L- shaped coil tray for receiving therethrough alignment bars in a coil case, for aligning said coil tray assembly in a coil case.

5. The coil tray assembly of claim 4, wherein said loading coils are vertically disposed within said cavities in said coil tray.

6. The coil tray assembly of claim 2, wherein connections are established with said loading coils by means of said terminal pins projecting through the bottom of said coil tray.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2079697 *May 15, 1935May 11, 1937Bell Telephone Labor IncLoading coil case
US3377699 *May 3, 1965Apr 16, 1968Bell Telephone Labor IncFluidized bed coating a core containing metal board, including circuit forming, core wiring and connecting steps
US3493908 *Apr 24, 1968Feb 3, 1970Pulse Eng IncComponent assemblage with cocoon means
DE407492C *Apr 25, 1920Dec 29, 1924Bell Telephone MfgFernsprechkabel
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3969580 *Sep 22, 1975Jul 13, 1976Northern Electric Company LimitedLoading coil assemblies for communications cables
US3970783 *Sep 22, 1975Jul 20, 1976Northern Electric Company LimitedLoading coil case and cable connection for communications cables
US3988707 *Nov 14, 1974Oct 26, 1976Amp IncorporatedSwing out load coil assembly
US4002832 *Sep 22, 1975Jan 11, 1977Northern Electric Company, LimitedLoading coil assemblies for communications cables
US4009340 *Sep 22, 1975Feb 22, 1977Northern Electric Company LimitedLoading coil assemblies for communications cables
US5198962 *Feb 11, 1991Mar 30, 1993Tyson Glenn MLighting system
US5276583 *Mar 30, 1993Jan 4, 1994Gty IndustriesLighting system
US5349505 *Nov 24, 1992Sep 20, 1994Gty IndustriesWet niche light
US5408397 *Jan 4, 1994Apr 18, 1995Gty IndustriesLighting system
US5483428 *Mar 31, 1994Jan 9, 1996Gty IndustriesWet niche light
US5486988 *Apr 11, 1995Jan 23, 1996Gty IndustriesLighting system
US5682289 *Sep 22, 1995Oct 28, 1997Hewlett-Packard CompanyChassis of a device
US5727873 *Jan 23, 1996Mar 17, 1998Gty IndustriesLighting system
US5743622 *Aug 14, 1996Apr 28, 1998Architectural Landscape LightingIn-ground light fixture
US6005463 *Jan 30, 1997Dec 21, 1999Pulse EngineeringThrough-hole interconnect device with isolated wire-leads and component barriers
US6011701 *Sep 23, 1997Jan 4, 2000Dmt Gmbh, Feinwerktechnische KomplettlosungenComponent housing for integration with furniture
US6288329Jul 9, 1998Sep 11, 2001Dmt Gmbh, Feinwerktechnische KomplettlosungenFolding component housing
US7175297Mar 12, 2004Feb 13, 2007B-K Lighting, Inc.In-grade light fixture with leveling and alignment mechanisms, installation features and anti-condensation valve
US7699489Mar 31, 2006Apr 20, 2010Hagen Douglas WIn-grade light fixture
US7905621Jan 18, 2008Mar 15, 2011Genlyte Thomas Group, LlcIn-grade lighting fixture
US7926970Mar 25, 2009Apr 19, 2011Genlyte Thomas Group LlcIn-grade lighting fixture
USRE34709 *Apr 9, 1993Aug 30, 1994Gty IndustriesLighting system
EP0046516A1 *Jul 27, 1981Mar 3, 1982Siemens AktiengesellschaftSynthetic casing for inductance coil
EP1012858A1 *Jan 23, 1998Jun 28, 2000Pulse Engineering, Inc.Through-hole interconnect device with isolated wire-leads and component barriers
Classifications
U.S. Classification336/65, 178/46, 336/96, 336/92, 174/522, 174/564, 361/811
International ClassificationH02G15/10, H02G15/12, H01F27/02
Cooperative ClassificationH02G15/12, H01F27/02
European ClassificationH01F27/02, H02G15/12
Legal Events
DateCodeEventDescription
Feb 28, 1989ASAssignment
Owner name: AG COMMUNICATION SYSTEMS CORPORATION, 2500 W. UTOP
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:GTE COMMUNICATION SYSTEMS CORPORATION;REEL/FRAME:005060/0501
Effective date: 19881228