Original Publication Date: 1976-Mar-01
Included in the Prior Art Database: 2005-Mar-02
AbstractThe illustrated wafer switch is a design which provides denser packing of switch circuits and reduces manufacturing and maintenance costs.
The illustrated wafer switch is a design which provides denser packing of switch circuits and reduces manufacturing and maintenance costs.
The key elements are shown in the exploded view of Fig. 1. These elements include a bottom housing deck 1, a lower elastic diaphragm switch (EDS) assembly 2, an actuator disk 10, an upper EDS assembly 4, a top housing deck 5, and a disk rotating shaft 6.
Fig. 2 is a side view of an embodiment wherein two assemblies as shown in Fig. 1 are stacked. More units may be stacked to meet more complicated switching needs. Shaft 6 has a flat surface 3 which tightly fits keyed hole 11 in contact disk 10, causing the shaft 6 and disk 10 to rotate together. Bosses 12 on disk 10 serve as aligners by rotating in holes 8 in decks 1 and 5. Disk 10 has spring actuators 13 and 14 which work against the EDS assemblies 2 and 4, respectively. These actuators make and break various contact points on the EDS switch.
As shown in Fig. 3, the construction of disk 10 and its actuators 13 and 14 is simplified to reduce cost. Spring material, such as beryllium-copper, is bonded to an insulated disk 15. Then all contacts are formed in the sheet of spring material, eliminating the small leaf springs and their individual assembling of presently manufactured wafer switches.
Construction of disk 10 starts with a base 15, which is of insulator material, such as phenolic or an engineering plastic. Holes 16 are provided wherever an actuator is to be m...