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Attachment of Coil Leads to Bobbins

IP.com Disclosure Number: IPCOM000087025D
Original Publication Date: 1976-Dec-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Darwin, DP: AUTHOR

Abstract

The present mode of connecting coils wound on bobbins to other circuit components by using the ends of the wire in the bobbin is expensive and space consuming, particularly where the wire is small and coils are to be closely spaced. The coil unit will be sturdier and easier to handle if the coil leads are made as short as possible and are secured to a connection point.

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Attachment of Coil Leads to Bobbins

The present mode of connecting coils wound on bobbins to other circuit components by using the ends of the wire in the bobbin is expensive and space consuming, particularly where the wire is small and coils are to be closely spaced. The coil unit will be sturdier and easier to handle if the coil leads are made as short as possible and are secured to a connection point.

In the coil shown above, a bobbin 1 has wire 2 wound thereon. The ends of the wire 2 are brought out of the end of the bobbin 1 through an inner hole 3 and an outer hole 4. The end of bobbin 1 has at least a pair of contact plates 5 and 6 plated or otherwise deposited thereon, one around each of the holes 3 and 4 and to which the wire 2 from the associated hole 3 or 4 is soldered. External contact to the coil can be made by using heavier wires soldered to the platings 5 and 6 or, preferably, by contact fingers 8 and 9 fixed to the machine and held against the contacts 5 and 6. In this case, a gold flashed plating on contacts 5 and 6 is desirable to avoid corrosion.

With this type of coil termination, coils can be interchanged without the need for unsoldering and soldering connections to the fine wire 2 of the coil.

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