Browse Prior Art Database

Lock for Circuit Card

IP.com Disclosure Number: IPCOM000096818D
Original Publication Date: 1963-Dec-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 73K

Publishing Venue

IBM

Related People

Gallagher, J: AUTHOR

Abstract

In some installations using printed circuit boards, it is desirable that the boards be locked in place to prevent tampering with the circuits or removal of the card. In addition, some indication should be given that the board has been meddled with.

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Lock for Circuit Card

In some installations using printed circuit boards, it is desirable that the boards be locked in place to prevent tampering with the circuits or removal of the card. In addition, some indication should be given that the board has been meddled with.

This lock coacts with the contacts in the connector socket and with the board. It has a strip 10 of plastic such as nylon. This is formed with triangular shoe 11 on one end and pin 12 on the other. In use, shoe 11 is inserted in socket 14. Board 15 is then inserted.

Such moves lip 16 of contact 17 over the top of shoe 11. Pin 12 is then inserted in a hole in the circuit board and fastened by crimping, melting or upsetting the outer end. The shoe may take different shapes such as 18 which cover and engage all the contacts in the socket.

Another form 20, on the right, has a bent pin 21 in place of the straight pin 12 and V-shaped shoe 22 on the base. Pin 21 is inserted in the board with the bent portion up and the board is inserted in the socket 23. Free leg 24 of the shoe is flexible. It flexes when the lower end of the strip is inserted past the lip 25 of contact 26. Once by the lip, it returns to normal and locks under the lip preventing removal of the card.

When once inserted and the pin deformed, the board cannot be removed without cutting or breaking the strip. The elongated shoe 18, by covering the socket contacts, prevents meddling.

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