Orthogonal input keyboards

Orthogonal input keyboards
Country	US
Patent number	3945482
Issued on	23 March 1976
Inventor	Harvey Einbinder
Reference	US 3945482

Orthogonal input keyboards is an invention by Harvey Einbinder in 1973. Its patent number 3945482 was granted on 1976. Most ergonomic keyboards are manufactured under this patent. ^[1]

Description

Orthogonal input keyboards

Inventor: Harvey Einbinder
Patent number: 3945482
Filing date: 14 December 1973
Issue date: 23 March 1976

Abstract

Orthogonal ten finger keyboards are disclosed for typewriters computer terminals and other devices processing alphanumeric information that maximize entry rates and stroking accuracy and minimize finger motions and the time needed to master the keyboard.

The invention employs a plurarity of vertically oriented keys adjacent to horizontal home keys. The invention places five high frequency consonants on home keys under the fingers of the right hand the space and four high frequency vowels on home keys under the fingers of the left hand and ten medium frequency characters on adjacent vertical keys. Two key chords executed by fingers of the same hand generate common two character sequences belonging to the keys stroked.

The keyboard is split into rotated halves containing curved key rows and slanted key tops of variable height to follow the architecture of the hand. The invention discloses optimum orthogonal keyboards for, English, German, French, Italian, Spanish, Portuguese, Swedish and, Dutch.

Harvey Einbinder
Orthogonal input keyboards

Referenced by

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