Abstract: A link-member swinging apparatus for reciprocatively swinging a link member while keeping a fulcrum portion of the link member at substantially a predetermined location, including an actuator which is operatively connected to an input portion of the link member, the input portion of the link member being distant from the fulcrum portion thereof in a lengthwise direction of the link member, and a supporting device which elastically supports the fulcrum portion of the link member, while permitting the fulcrum portion to be elastically moved from a reference position thereof in a direction intersecting the lengthwise direction of the link member.

Abstract: A sewing machine includes a bed, a pedestal supported by the bed and an arm extending generally parallel to the bed. One end of the arm is supported by the pedestal, this end having a driving motor located therein. The location of the driving motor suppresses vibration created when the sewing machine is operated and facilitates access thereto.

Abstract: According to a sewing machine with a bobbin thread monitor, the light emitted from a luminescence element is reflected by a bobbin thread or a rotating hook bobbin and received by a light receiving element. The light receiving element outputs the detection signal according to an amount of thread remaining on the bobbin based on the reflection light. A color sensor detects the wave length of the color of the bobbin thread and outputs the signal according to the result of the detection. A CPU corrects the detection signal output from the light receiving element based on the signal output from the color sensor so that the amount of thread remaining on the bobbin is detected.