Abstract: An automatic and improved electrical control for an automatic hydronic zone valve including a switching device for opening and closing solenoid valves based on adjustable temperature settings. Specifically, the preferred system involves a solenoid-controlled valve in which the solenoid is activated and deactivated by an electrical control circuit which relies on an external thermostatic switch and an internal relay to open and alternately close the following sub-circuits: a solenoid control sub-circuit which is directly connected to the valve solenoid, an AC to DC converter, relay control circuitry, a relay switch connection to a water circulator system and LED sub-circuits indicating power status and/or activation of the heating system. The solenoid control sub-circuit includes a series thermistor and a parallel capacitor to, respectively, slow the provision of electrical current to the solenoid to avoid "water hammer," and, quiet the electronic hum of the solenoid.

Abstract: Ink compositions are provided which are suitable for use in ink jet printing on coated or uncoated substrates to form images which are highly resistant to abrasion and penetration by virtue of the penetrating characteristics of a select solvent system. The ink compositions may be of the binder or binderless type and contain, in the preferred embodiments, from about 0.1% to about 5% by weight of a colorant, optionally, from about 3 to 30% by weight of a soluble resole resin, a penetrating solvent consisting of tetrahydrofuran, an auxiliary solvent comprising a lower aliphatic alcohol, ketone, ether or aliphatic amide, a surfactant and an electrolyte.