# US 5,350,318 A · Biomedical electrical connector using a socket receptacle having a resilient sheath

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- Number: US 5,350,318 A
- Document ID: US5350318A
- Status: Granted
- Kind: A
- Application number: 08/133,774
- Filed: 1993-10-08
- Granted: 1994-09-27
- Earliest claimed: 1991-02-27
- Assignees: Minnesota Mining and Manufacturing Company
- Inventors: Terry S. Nees
- Web page: https://patentgrep.com/patent/US5350318A

## CPC

- H01R 24/20: Coupling parts carrying sockets, clips or analogous contacts and secured only to wire or cable
- H01R 43/16: for manufacturing contact members, e.g. by punching and by bending
- H01R 13/025: {formed by the conductors of a cable end}
- H01R 2101/00: One pole
- Y10S 439/93: Coupling part wherein contact is comprised of a wire or brush
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A two component leadwire system is disclosed for electrical connection between biomedical electrodes and electrical equipment for diagnostic or therapeutic use. One leadwire component has a bayonet terminus and can be rugged for reuse. The second leadwire is an inexpensively-made receptacle for making electrical contact with the bayonet. The receptable has a socket for receiving the bayonet and an electrical conductor surrounded by a resilient, insulative sheath. When the bayonet is inserted into the socket, the sheath resiliently grips the bayonet and holds the bayonet in electrical contact with the conductor. A method for making the receptacle components, involving dip molding of the conductor arrayed on a mandril, is also disclosed.

## Claims

### Claim 1

A receptacle for making electrical contact with a bayonet connector, comprising:
a dip molded socket for receiving the bayonet connector comprising an electrical conductor surrounded by a resilient, insulative sheath, wherein said socket is formed by dip molding said sheath from a plastisol about said electrical conductor, and whereby when the bayonet connector is inserted into said socket, said sheath resiliently grips the bayonet connector, holding the bayonet connector in electrical contact with said conductor.

### Claim 2 (depends on 1)

The receptacle according to claim 1, wherein said resilient insulative sheath comprises polyvinyl chloride.

### Claim 3 (depends on 1)

The receptacle according to claim 1, wherein said electrical conductor has at least one point protruding from said sheath into said socket.

### Claim 4 (depends on 1)

The receptacle according to claim 1, wherein said sheath has an inner wall about a bore, and wherein said electrical conductor penetrates said inner wall and protrudes into said bore at at least one point for establishing electrical contact with the bayonet connector.

### Claim 5 (depends on 4)

The receptacle according to claim 4, wherein a portion of said electrical conductor is shaped into a coil concentric with and protruding into said bore, so that when the bayonet connector is inserted into said bore, the bayonet connector is contained within said coil and in electrical contact at at least one point.

### Claim 6 (depends on 1)

The receptacle according to claim 1, wherein said sheath comprises a polymer having a Shore A Durometer of about 78 Shore A, a Tensile Strength of at least about 141 kg/cm.sup.2, and a Percent Elongation of at least 350%.

### Claim 7

) A two component leadwire system between a biomedical electrode and electrical equipment for diagnostic or therapeutic use, comprising:
a first leadwire component in electrical contact with the electrical equipment, and
a second leadwire component in releasable electrical contact with said first leadwire component and also in electrical contact with the biomedical electrode,
said first leadwire component having an electrically conductive bayonet terminus, and
said second leadwire component having a did molded socket for receiving said bayonet terminus, said socket comprising an electrical conductor surrounded by a resilient, insulative sheath, wherein said socket is formed by dip molding said sheath from a plastisol about said electrical conductor, and whereby when said bayonet terminus is inserted into said socket, said sheath resiliently grips said bayonet terminus, holding said bayonet terminus in electrical contact with said electrical conductor.

### Claim 8 (depends on 7)

The two component leadwire system according to claim 7, wherein said resilient insulative sheath comprises polyvinyl chloride.

### Claim 9 (depends on 7)

The two component leadwire system according to claim 7, wherein said electrical conductor has at least one point protruding from said sheath into said socket.

### Claim 10 (depends on 7)

The two component leadwire system according to claim 7, wherein said sheath has an inner wall about a bore, and wherein said electrical conductor penetrates said inner wall and protrudes into said bore at at least one point establishing electrical contact with the bayonet connector.

### Claim 11 (depends on 10)

The two component leadwire system according to claim 10, wherein a portion of said electrical conductor is shaped into a coil concentric with and protruding into said bore, so that when the bayonet connector is inserted into said bore, the bayonet connector is contained within said coil and in electrical contact at at least one point.

### Claim 12 (depends on 7)

The two component leadwire system according to claim 7, wherein said sheath comprises a polymer having a Shore A Durometer of about 78 Shore A, a Tensile Strength of at least about 141 kg/cm.sup.2, and a Percent Elongation of at least 350%.