Temperature Compensation for Flexible Cables in Workboard Holder
Original Publication Date: 1986-Nov-01
Included in the Prior Art Database: 2005-Mar-09
The present structure compensates for thermal expansion coefficient differences between flexible circuit cable material a workboard holder, having one or more openings through which the cables pass for electrical connection to components carried by the workboard. As shown in Fig. 1, the structure includes one or more bimetallic springs 11 mounted in openings in the sides of the workboard holder 12. As shown in Fig. 2, each of the bimetallic elements 11 is clamped at one end thereof, and the other end may be folded to center and grasp the flexible cable. By suitable design, such bimetallic springs can control the tension on the flexible cable from room temperature up to 430 degrees Fahrenheit, which is well within the working process limits encountered in reflow soldering and other operations in circuit fabrication.