Browse Prior Art Database

Loose Connector Detection

IP.com Disclosure Number: IPCOM000077057D
Original Publication Date: 1972-Jun-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Mattern, RC: AUTHOR

Abstract

A data processing apparatus may contain a large number of plug connected circuit cards and cable assemblies. If some of these connections are loosened accidentally, the machine may malfunction and some time may be required to discover the location of the trouble.

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Loose Connector Detection

A data processing apparatus may contain a large number of plug connected circuit cards and cable assemblies. If some of these connections are loosened accidentally, the machine may malfunction and some time may be required to discover the location of the trouble.

A preindication of the problem can be provided by a circuit which detects such loose connectors. In Fig. 1 the logic card or circuit card has a connector shroud which houses socket elements to receive the pins of connectors on the machine, not shown. Each socket shroud is provided with a pair of contacts which engage short pinned or land areas on the machine socket, only when the card connector is well seated into the socket. The card has a land pattern bridging between the contacts.

In Fig. 2 this land pattern is represented by the dotted lines at each card position, and the machine has a circuit path connecting the card engaging pins in series with a power supply and the solenoid of a normally closed relay. When any of the cards is improperly seated, this series circuit is broken and the relay closes to complete a circuit from ground through an indicator lamp to an indicator voltage supply, indicating the fault. This ground connection is also communicated through the relay to a log out device and, through the OR circuit to the central processor unit of the equipment, to initiate equipment shutdown or some other appropriate action.

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