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Low Cost Key Top Structure for Serpentine Strip Keyboard

IP.com Disclosure Number: IPCOM000082209D
Original Publication Date: 1974-Oct-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Long, EE: AUTHOR

Abstract

This keyboard is fabricated at lower than normal cost, because of unitary molding of a multiple of normally separate parts and elimination of assembly labor.

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Low Cost Key Top Structure for Serpentine Strip Keyboard

This keyboard is fabricated at lower than normal cost, because of unitary molding of a multiple of normally separate parts and elimination of assembly labor.

This embodiment of a serpentine keyboard strip assembly comprises a bottom plate 20, an upper plate 22 and a flexible "serpentine" strip 24. For clarity, the plates and the strip 24 are shown cut at the near edge of the apertures into which "key-tops" 28 fit and the near edge of the next set of key-top apertures. The elements actuated by depressing the key-tops 28 are associated with the flexible strip 24, as by magnetic coupling, for example, and are omitted here for clarity.

The upper plate 22 and the key-tops 28 are molded in one operation. The molding is fairly stiff except for the hinge portions attaching the key-tops 28 to the upper plate 22. When a key-top 28 is depressed the flexible strip 24 is pulled taut at the other key-top positions, and any other key 28 formerly depressed will be restored to the initial position.

The key-tops 28 preferably are made in two-color combinations, as shown, such that a depressed key-top 28 will show a different color to the eye of the operator than the undepressed keys.

Similarly, numerals and other symbols can be arranged to be seen in a desired one of the two positions.

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