Abstract: A removable protector for protecting a thermally responsive member of a sprinkler head includes first and second shields each having protective surfaces. The protective surfaces are positioned to protect portions of the thermally responsive members that are exposed to potential contact with objects that are external to the sprinkler head. Each of the shields has a receiving end which slides over the sprinkler head during attachment of the protector. Each of the shields also has a connecting end attached to a cross member which connects the two shields and which provides an appropriate amount of spacing between the shields to permit clearance for accommodating various sprinkler head components when the protector is attached to the sprinkler head. A releasable fastener attaches the protector to the sprinkler head and secures the major protective surfaces of the first and second shields proximate the exposed portion of the thermally responsive member of the sprinkler head.

Abstract: A bracket assembly and method for positioning a cooling fan thermostat on a motorcycle engine so that the mounted thermostat is more responsive to actual changes in engine temperature. The bracket mounts on the engine's engine block near the base of the cylinders and positions the thermostat close to the cylinders' cooling fins. This positioning leaves the thermostat well below the lines of air flowing from the fan and prevents the thermostat from cooling before lowering the engine temperature below the preset maximum level. This positioning also leaves the thermostat closer to the cylinders which are the most significant sources of heat in the engine, making the thermostat more convectively responsive to the engine's actual temperature.

Abstract: A battery's impedance is measured by a technique that normally uses a current divider network which is connected to the battery. The circuit used according to this technique has a current generator producing a regulated current signal and has one or more sensing impedances which are normally positioned electrically parallel, or in some alternate embodiments in series, with the battery. A DC-blocking capacitor prevents the battery voltage from draining into the one or more sensing impedances. A magnetic field sensor or comparable device measures the magnitude and/or phase of current passing through the sensing impedances. Substitution of a number of calibrated impedances into the circuit in place of the battery permits an initial mathematical computation of the battery's impedance utilizing this technique. Thereafter battery impedances can be computed with the current without using calibrated impendances.