Abstract: An illumination system of the invention comprises: a first illumination unit comprising a pair of power supply contacts for connection to a commercial AC power source, a light source connected between the pair of power supply contacts, a control circuit connected in series to the light source to control electric current flowing through the light source, and a connection cord connected to the light source; and a second illumination unit comprising a light source and a connection cord connected to the light source, wherein the connection cord of the first illumination unit and the connection cord of the second illumination unit are connected to each other so that the light source of the first illumination unit and the light source of the second illumination unit are connected in parallel to each other.

Abstract: An illumination system of the invention comprises: a first illumination unit comprising a pair of power supply contacts for connection to a commercial AC power source, a light source connected between the pair of power supply contacts, a control circuit connected in series to the light source to control electric current flowing through the light source, and a connection cord connected to the light source; and a second illumination unit comprising a light source and a connection cord connected to the light source, wherein the connection cord of the first illumination unit and the connection cord of the second illumination unit are connected to each other so that the light source of the first illumination unit and the light source of the second illumination unit are connected in parallel to each other.

Abstract: A color illumination device of the invention comprises a plurality of color light sources for emitting lights of at least two different colors; a control unit for controlling the plurality of color light sources; a light mixture means for mixing the lights emitted from the color light sources to produce an illumination light, and a control operable to change a value of a variable, wherein the value of the variable determines a color of the illumination light.

Abstract: Since a solenoid device generates the maximum drawing force at the final position of the retracting stroke of a plunger when it retracts into the solenoid device, the drawing force becomes so large at a position close to a pressing end position of a pressing member that energy is consumed than necessity, and the solenoid device is made large-sized. Accordingly, an arch clamp foot lifting apparatus of the present invention solved this problem by connecting a wedge-shaped block member to a plunger of the solenoid device and retaining an upper portion of the pressing member on a cam surface of a block member through a driven portion.

Abstract: A sewing machine is provided with a workpiece clamping unit which clamps and carries a workpiece along the surface of the bed during stitching operation, and a workpiece clamping unit driving mechanism comprising a driving means and a motion converting means. The driving means comprises first and second drive shafts, first and second driving sources for driving the first and the second drive shaft, and first and second compound plate cams fixedly mounted respectively on the first and the second drive shafts. The motion converting means converts the angular motions of the first and the second drive shaft into motions parallel to the upper surface of the bed (6) of the sewing machine.