Abstract: An apparatus including a cap is provided for covering, protecting, removing moisture from, and cleaning a lens of a device such as a scope of a firearm. The inner portion of the apparatus contains a moisture-wicking material. The cap may be manipulated to clean and remove moisture from the lens, such that when the cap is opened, the lens is clean and moisture-free, with the scope ready for use.

Abstract: An apparatus including a cap adapted for covering, protecting and cleaning a lens of a device such as a scope of a firearm. The cap may be manipulated to clean the lens, such that when the cap is opened, the lens is clean, with the scope ready for use.

Abstract: An engine monitor includes, in a self-contained preferably sealed unit, a spark sensor, inductively and capacitively coupled through the case to a spark pick up wire, a timer, and a running time detector, responsive to inputs from the spark pick up to provide total running time, job time, and service time metering. Preferably, storage means are included for storing maximum RPM and spark mode data, that is, data indicating the number of firings per RPM for the particular engine, as well as a preset service interval and one or more auxiliary timers.