Selectively controlled keyboard support

Details Selectively controlled keyboard support Selectively controlled keyboard support

1991-01-07

1992-03-24

Ramirez, Ramon O.

Supports

Brackets

Adjustable

108 6, 248923, E04G 300

Patent

active

050980530

ABSTRACT:
A keyboard support apparatus has a mounting bracket (11), a keyboard support bracket (15) pivotally connected via parallel bars (20, 25) permitting change in altitude of bracket (15). The mechanism may be locked against change in altitude by means of a formation 58 associated with a bar (20) which is interengageable with a formation (54) associated with bracket (15) by means of a laterally operable lever 40 resiliently biased by a spring plate 52 towards engagement. In a preferred embodiment (FIGS. 13 to 15) support bracket (15) may be tilted about a pivot (22) and the mechanism permits one-handed selective operation of altitude adjustment or tilt adjustment.

REFERENCES:
patent: 2436773 (1948-02-01), Lambert
patent: 2636311 (1953-04-01), Tisdale
patent: 4031867 (1991-07-01), Cotterill
patent: 4691888 (1987-09-01), Cotterill
patent: 4706919 (1987-11-01), Soberalski et al.
patent: 4826123 (1989-05-01), Hannah et al.
patent: 4834329 (1989-05-01), Delapp
patent: 4988066 (1991-01-01), Cotterill
patent: 5037054 (1991-08-01), McConnell

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