| 摘要 |
A mechanism for mounting a free arm sewing machine in a cabinet such that the machine is selectively movable to an upper use position, a lower use position and a storage position. The mechanism includes a sewing machine support platform which is pivotally connected to a lower arm, the latter being pivotally connected to an upper arm at a point intermediate the ends of the upper arm. The upper arm, in turn, is pivotally connected to and depending from the underneath side of the sewing machine cabinet top. In the storage position, the sewing machine is entirely disposed beneath the cabinet top, and the platform and lower arm are substantially parallel and inclined relative to the vertical direction so that the machine can be easily lifted by the user to the lower use position. In the lower use position, the platform and lower arm are also parallel, with the platform front edge being supported by a notched bracket and the rear edge being supported on the lower arm. In the upper use position, the platform front edge is supported in a higher notch in the bracket with the rear edge being supported by means of a rearwardly extending plate supported on the upper end of the upper arm. In order to prevent the machine from rotating downwardly when in the storage position, the rearwardly extending plate is received in locking position between the lower arm and the lower end of the upper arm. Springs coiled around the rods defining the pivots for the upper and lower arms urge the mechanism to rotate in a direction toward the upper use position so that the major portion of the weight of the machine need not be supported by the user when moving it from one position to another.
|
