Abstract: Systems, methods, and other embodiments described herein relate to providing time synchronization between devices in a network. In one embodiment, a method includes synchronizing a plurality of remote interface units (RIU) to a single network time. The RIUs are connected in the network. The method includes receiving, by a first of the RIUs, a one pulse-per-second (1PPS) signal. The method further includes determining a 1PPS receive time and a 1PPS period based on the 1PPS signal and with respect to the single network time. The 1PPS receive time refers to when the 1PPS signal is received by the first of the RIUs. The method includes transmitting, by the first of the RIUs, a message to a second of the RIUs. The message includes the 1PPS receive time and 1PPS period. The second of the RIUs is one of the RIUs other than the first of the RIUs.

Abstract: A capacitance keyboard switch is provided which is of substantially reduced vertical dimensions for reducing in a keyboard the overall space requirements therefore. The switch of the invention has an overall height of only 0.750 inches (19.05 mm), and a length of travel of as much as 0.150 inches (3.81 mm). This is achieved by eliminating a housing for the switch altogether, utilizing a cooperating plunger-snap-in guide combination, and a single sheet movable capacitor plate which cooperates with a plate on the printed circuit board. In addition, the entire assembly is mounted and supported on the printed circuit board with the components snapped together without the use of separate hardware, such as screws or nuts.

Abstract: In a capacitive key for use in a keyboard, an operator depresses a plunger which alters the separation between the plates of a capacitor, thereby altering its capacitance. It is desirable to provide plunger overtravel which permits further depression of the plunger after the capacitor has been altered. In the present invention a portion of the movable capacitor plate is formed into a spring which elastically deforms after the capacitor has been altered, to permit overtravel of the plunger.