keyboard switch assembly with a flexible printed circuit multiple switch assembly is disclosed application_number US 57910475 A description the several elements of the keyboard have been exploded vertically in fig1 to show the details of each element the relationship of one element to another and also to illustrate the natural uncomplicated method of assembling the elements to form the keyboard the lower most element in fig1 is base plate 10 on which the other elements rest this plate is preferably made from steel with a chromate conversion coating base plate 10 is made with a pair of downturned tabs 14 which provide one means for fastening the keyboard assembly to a telephone not shown or other devices employing a keyboard a flat flexible cable 16 shown directly over base plate 10 contains circuit paths 18 and contacts 20 deposited thereon there are two sets of contacts and upper contact set positioned at the end portion 21 of the cable and a lower contact set positioned inwardly from the end portion and on the other side of a fold line running normal to the axis of the cable this fold line is indicated by the reference numeral 22 the two sets of contacts are located on their respective portions of the cable in mirror image relation so that when end portion 21 is folded about fold line 22 the upper contacts are in direct overlying registration with the lower contacts when an upper contact touches a lower contact the particular circuit of which the contacts.