Abstract: A cuff link includes a magnetic arrangement for ready substitution of alternative decorative elements. One or more links of the cuff link comprises a frame member that is magnetically engageable to a removable element having a decorative exterior surface. The frame and the removable element include mating semi-cylindrical internal surfaces that receive disk-shaped pluralities of magnets. The disk-shaped magnets are arranged so that, when the frame is engaged to the replaceable element, they are aligned along a common axis whereby lines of magnetic flux are axially-directed therethrough to provide a strong bond. An edge of the removable element is bevelled to assist the wearer in ready substitution of replaceable elements.

Abstract: A d.c. controller pump includes electronic control mechanisms that permit regulated control within a fluid flow system. A pump head is coupled to a housing allowing the fluid to infiltrate the region surrounding a permanent magnet rotor. Stator windings and control electronics fixed to a plurality of printed circuit boards are isolated from the fluid by means of a solid body that encapsulates the stator windings and seals the rear of the cavity. Hall effect sensor-generators and other assemblies are fixed within the solid body to enhance integrity and reduce parts count. Associated electronics includes a readily-removable circuit board for housing auxiliary electronic functions. The board is mounted in parallel at the rear of the pump housing with boards of sensor and controller electronics. The auxiliary function electronics pump configurations enable both fixed and variable speed operation in accordance with fluid flow system design and parameters.