Supports – Brackets – Adjustable
Patent
1989-03-01
1991-07-16
Purol, David M.
Supports
Brackets
Adjustable
248284, 248918, F16M 1300
Patent
active
050318675
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a support apparatus suitable, but not exclusively, for supporting an electronic keyboard from a desk.
BACKGROUND ART
Electronic keyboards are commonly used on desks in offices and it is desirable to present the keyboard to the operator at a convenient position and orientation. Owing to the wide range in the requirements of keyboard operators it is known to provide versatile keyboard supports which may be adjusted to present the keyboard in a convenient position and orientation. Such keyboard supports suffer from the drawback that they are cumbersome and difficult to adjust. In particular it is a problem that after the keyboard has been moved from its working position, in order for the desk to be used for another purpose, a lengthy adjustment procedure is necessary before the keyboard can be returned to the optimum working position.
DISCLOSURE OF INVENTION
According to the invention there is provided a keyboard support apparatus comprising:
a first bracket and a second bracket interconnected by first, second and third elongate members; said first and second elongate members are pivotally attached by means of a first pivot pin to said first bracket; said first elongate member is also pivotally attached by means of a second pivot pin to said second bracket; said third elongate member is pivotally attached by means of a third pivot pin to said first bracket; said second and third elongate members are adapted to co-operate with a fourth pivot pin associated with said second bracket, and said fourth pivot pin is adapted to releasably engage said second and third elongate members; the arrangement being such that, in use, one of the first and second brackets is connected to a supporting surface and the other to a keyboard and the elongate members, when released from engagement with the second bracket, are moveable substantially in the same plane.
BRIEF DESCRIPTION OF DRAWINGS
A preferred embodiment will now be described by way of example only with reference to the accompanying drawings in which:
FIG. 1 shows a perspective view of keyboard support apparatus embodying the invention;
FIG. 2 shows a detail of part of the keyboard support apparatus shown in FIG. 1;
FIG. 3 shows a side view of the keyboard support apparatus shown in FIG. 1 at one extreme of its travel; and
FIG. 4 shows a side view of the keyboard support apparatus shown in FIG. 1 at the other extreme of its travel.
BEST MODE FOR CARRYING OUT INVENTION
Referring now to FIGS. 1-4, keyboard attaching bracket 22 to which a keyboard or shelf may be bolted is connected to keyboard mounting block attaching bracket 23 by means of two parallel elongate members 24 and 25. Elongate member 24 is attached to bracket 23 by means of pivot pin 27, and attached to bracket 22 by means of pivot pin 26. Elongate member 25 is attached to bracket 23 by means of pivot Pin 28, and is attached to bracket 22 by means of pivot pin 29 which resides in longitudinal slot 30 of elongate member 25.
A third elongate member 31 interconnects brackets 22 and 23. Elongate member 31 is attached to bracket 23 by means of pivot pin 27 and is attached to bracket 22 by means of pivot pin 29 which engages in longitudinal slot 32 of member 31.
Bracket 22 is connected at one side of the underside of a keyboard, and bracket 23 is connected at one side of the underside of a keyboard mounting body, such as a desk (not shown) This connection may be made, for instance, by bolts which pass through holes in the overhang 35 of bracket 25 and through holes or slots (not shown) of the mounting body). Further brackets 33 and 34 are connected to the other sides of the keyboard and mounting body in order to prevent rotation of the keyboard with respect to the mounting body. Brackets 33 and 34 are interconnected by a further elongate member 35 which is pivotally attached at either end by means of pivot pins 36 and 37 respectively. An alternative arrangement would be to connect brackets 22 and 23 at the centres of the keyboard and keyboard mounting body, in
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patent: 4776284 (1988-10-01), McIntosh
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