# US 4,397,519 A · Electrical contact construction

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- Number: US 4,397,519 A
- Document ID: US4397519A
- Status: Granted
- Kind: A
- Application number: 06/262,842
- Filed: 1981-05-12
- Granted: 1983-08-09
- Earliest claimed: 1981-05-12
- Assignees: Pylon Company, Inc.
- Inventors: James S. Cooney
- Web page: https://patentgrep.com/patent/US4397519A

## CPC

- H01R 13/2421: {using coil springs}
- G01R 1/06722: {Spring-loaded}
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)

## Abstract

An electrical contact construction is disclosed of the type that is provided with a spring-loaded contact plunger and includes an elongated tubular body portion in which the plunger is received, retaining means as defined by spaced elongated projections being formed in the wall of the tubular body portion for restricting outward movement of the plunger.

## Claims

### Claim 1

An electrical contact construction, comprising an elongated tubular body portion formed of a metal material and being open at least at one end to expose the interior bore thereof, a metallic plunger extending into said bore in sliding relation therein and having an enlarged inner plunger portion joined to the inner end thereof, an outer contact plunger portion formed on the exterior end of said plunger for engagement with an exteriorly located contact, a spring located in said bore and being operative to normally urge said plunger in an outwardly direction for exposing said outer contact plunger portion, and retaining means formed in said body portion and being engageable with said plunger for preventing said plunger from sliding outwardly of said body portion, said retaining means including a plurality of spaced inwardly directed projections which define an interrupted annular ring substantially perpendicular to the longitudinal axis of said body portion, the longitudinal dimension of each of said projections extending in the direction of the ring and being greater than the lateral dimension thereof.

### Claim 2 (depends on 1)

An electrical contact construction as claimed in claim 1, the longitudinal dimension of said inwardly directed projections being more than twice the lateral dimension thereof.

### Claim 3 (depends on 1)

An electrical contact construction as claimed in claim 1, at least four of said projections being formed in said body portion.

### Claim 4 (depends on 3)

An electrical contact construction as claimed in claim 3, said projections being spaced equidistant apart around the periphery of said tubular body portion.

### Claim 5 (depends on 4)

An electrical contact construction as claimed in claim 4, the centermost point of each projection being spaced 90.degree. apart in radial relation with respect to the centermost point of the adjacent projections.