Browse Prior Art Database

Latching Keyboard Mechanism

IP.com Disclosure Number: IPCOM000095536D
Original Publication Date: 1964-Feb-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 23K

Publishing Venue

IBM

Related People

Krakinowski, M: AUTHOR [+2]

Abstract

In this latching device for a contact switch, the latter has three separate layers. The two non-conductive outer layers 1 and 2 have conductive strips 3 located on the inside surfaces. The conductive strips 3 have coatings of magnetic material 4. The center layer 5 contains an opening through which the outer layers 1 and 2 can be brought into contact by pressure to thus close the switch. A permanent magnet 6 is located proximate to the switch. Magnet 6 is not strong enough to close the switch, but is strong enough to maintain it closed after it has been closed by pressure.

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Latching Keyboard Mechanism

In this latching device for a contact switch, the latter has three separate layers. The two non-conductive outer layers 1 and 2 have conductive strips 3 located on the inside surfaces. The conductive strips 3 have coatings of magnetic material 4. The center layer 5 contains an opening through which the outer layers 1 and 2 can be brought into contact by pressure to thus close the switch. A permanent magnet 6 is located proximate to the switch. Magnet 6 is not strong enough to close the switch, but is strong enough to maintain it closed after it has been closed by pressure.

When magnet 6 is moved slightly through the distance d, the magnet circuit is no longer through the upper conductive layer, but is, instead, shunted entirely through the lower conductive layer, thus releasing the switch.

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