Browse Prior Art Database

Spring Plunger Contact

IP.com Disclosure Number: IPCOM000077074D
Original Publication Date: 1972-Jun-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 28K

Publishing Venue

IBM

Related People

Buyck, WJ: AUTHOR [+4]

Abstract

The present spring plunger contact is designed to provide improved contact with the surface to be contacted by utilizing a rotatable plunger. As shown, a hollow tubular barrel 1 is provided which has fixed at one end a terminal member 2. The barrel houses a coil spring 3 which has one end fixed to the terminal member and the other end fixed to the end portion of shank 4 of the contact plunger 5. The contact plunger is given a drill bit or helical configuration and attached at the end of the barrel, is an extruded or molded plastic bushing 6 which has a matching spiral for receiving the contact plunger. Thus, as the plunger is depressed to make contact, it moves axially inward and at the same time is rotated. The plastic bushing 6 acts as a bearing for the plunger giving it a long life.

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Spring Plunger Contact

The present spring plunger contact is designed to provide improved contact with the surface to be contacted by utilizing a rotatable plunger. As shown, a hollow tubular barrel 1 is provided which has fixed at one end a terminal member
2. The barrel houses a coil spring 3 which has one end fixed to the terminal member and the other end fixed to the end portion of shank 4 of the contact plunger 5. The contact plunger is given a drill bit or helical configuration and attached at the end of the barrel, is an extruded or molded plastic bushing 6 which has a matching spiral for receiving the contact plunger. Thus, as the plunger is depressed to make contact, it moves axially inward and at the same time is rotated. The plastic bushing 6 acts as a bearing for the plunger giving it a long life. Spring 3 will act to return the plunger to its normal position.

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