Keypunch acoustic cover

Claim 1

An acoustic cover suitable for application to a keyboard operated machine, comprising: a. a fixed back wall; b. fixed first and second end walls secured along rearward edges to said back wall; c. a top part pivoted along a rear edge to said back wall and arranged to be movable between a lowered, generally horizontal position in which the top part engages the top edges of said first and second end walls, and a raised position allowing access to the top of the machine; d. a front part having an upper edge connected to a front edge of said top part by hinge means permitting movement of said front part from a lowered position in which the front part extends downwardly from the Front edge of the top part, to a raised position displaced more than 180* from said lowered position relative to the top part and in which said front part rests on top of said top part, said hinge means being associated with stop means preventing substantial pivotable movement of the front part relative to the top part beyond said lowered position, e. biasing means which sufficiently counteract the combined weight of said top and front parts to hold said top and front parts against falling when said top part is in its raised position, f. sound absorbing and deadening material fitted to inner surfaces of each of said back and end walls; whereby said cover may be used (1) with both top and front parts in the lowered position and enclosing said machine; (2) with said top part lowered and limiting noise from the top of the machine and with said front part in said raised position allowing access to the front of the machine, and (3) with said top part raised and with said front part swung over and resting on said top part allowing access to the machine from above.