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Browse Prior Art Database

Keyboard Shift-Lock Device

IP.com Disclosure Number: IPCOM000035373D
Original Publication Date: 1989-Jul-01
Included in the Prior Art Database: 2005-Jan-28
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Nakayama, T: AUTHOR

Abstract

This article describes a keyboard shift-lock device that can be fitted to the keyboard of a typewriter or computer. It enables a user to keep a key held down or released with a single stroke.

This text was extracted from a PDF file.
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This is the abbreviated version, containing approximately 100% of the total text.

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Keyboard Shift-Lock Device

This article describes a keyboard shift-lock device that can be fitted to the keyboard of a typewriter or computer. It enables a user to keep a key held down or released with a single stroke.

Normally, a keyboard is in 'shifted' mode while a shift key is held down and returns to 'normal (released)'mode when the key is released. The device changes this mechanism. The shift key is held down by a mechanical part fitted to it, so it is locked in 'shifted' mode.

The device consists of three parts: a mechanical part, a vise part, and an arm part (Fig. 1). The mechanical part is fixed to the shift key. At the top of this part there is a button. A pin under the part projects and retracts alternately when the button is pressed (Fig. 2). The vise part fixes the whole device to the keyboard or desk. The arm part connects the mechanical part and the vice part. The arm part's flexible joint allows the mechanical part to be placed in the proper position on the shift key (Fig. 3).

The pin projects when the button is pressed. It holds down the shift key, and the keyboard is locked into 'shifted' mode. When the button is pressed again, the pin retracts, and the keyboard returns to 'normal' mode.

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