Abstract: A device for clamping a multiplicity of emblems to be monogrammed or embroidered receives and positions the emblems in an assembly comprising a base plate, an emblem insert plate, and a clearance plate. A clip plate and a cover plate are hingedly attached to the base plate and the emblem insert plate. Aligned apertures are provided in all of the plates permitting access by the sewing needle to the emblem held within the device. A plurality of projections is provided around the periphery of each aperture in the clip plate to grippingly engage the edge of each emblem to be monogrammed or embroidered. The cover plate is formed so as to apply a substantially constant pressure across the clip plate and to the projections provided therein.

Abstract: A knife sharpening device having a grinding element adapted to be moved into the knife edge in a spiral path through a 180.degree. traverse and reverse, simultaneously moving longitudinally throughout the length of the knife's edge. A blade stropping element may be contained as an insert in the grinding element to strop the knife's edge during the reverse traverse.

Abstract: A force transfer assembly connects the output centerpoint of a Cardan gear mechanism to a work performing assembly. The motion of the output centerpoint moving in a first and second plane is translated by the force transfer assembly such that the work performing assembly moves in first, second and third planes. The force transfer assembly preferably includes a rotatable spherical element carried by the output lever of the Cardan gear mechanism, with a slider pin journalled in the spherical element and connected to the work performing assembly.

Abstract: A sewing machine wherein the various stitch performing instrumentalities are driven by Cardan gear means. Particular sewing part mechanisms are associated with each of said Cardan gear means to produce the desired stitch. Both said sewing part mechanisms and said Cardan gear means being removable, and interchangeable within the frame of the sewing machine.

Abstract: A Cardan gear assembly wherein rotary input motion of the main shaft is converted to elliptical output at the Cardan gear output centerpoint. The Cardan gear output centerpoint is connected via a ball and a pin slideable therethrough to a support having a work performing instrumentality arranged at its distal end. During operation, the elliptical output motion of the Cardan gear output centerpoint is transmuted into three dimensional, elliptical like motion at the tip of the work performing instrumentality.

Abstract: The output centerpoint of a Cardan gear mechanism is connected via a ball and a pin slideable therethrough to a lever which in turn carries a looper. Because the major axis of the lever and the axis swept out by the output centerpoint are skewed the lever is reciprocated back and forth along its own major axis while being rotated therearound. This results in the looper being swept back and forth along part of a generally helical-like path.

Abstract: A Cardan gear assembly having an output centerpoint means which moves along an elliptical path. A force transfer means connects the output centerpoint to a means operative to carry a work performing means. The major axis swept out by the means operative being skewed with respect to the major axis of the ellipse which is swept out by the output centerpoint. As a result, the work performing means will be swept along a curve which is of a portion of a helix as well as part elliptical. This curve takes the form of a partial helix wherein the outgoing path is different from the return path.

Abstract: A Cardan gear assembly wherein rotary input of the main shaft is converted to elliptical output at the output centerpoint. A force transfer means connects the output centerpoint to a means supporting a work performing instrumentality. Thus during operation the work performing instrumentality is driven through an elliptical like curve.