Abstract: A keyless system especially useful in controlling the doors and trunk of an automobile is disclosed. The overall system usually comprises an input station containing a keyboard, a signal processor, signal amplification means and an electromechanical grouping which converts the electrical output from the amplifier to mechanical movement in control of a lock. The system is activated by a touch control at the input keyboard and with the power section of the system energized, the lock is controlled in response to a proper sequence of digital input signals created by the operator. The input at the control station is described in terms of a keyboard having five selectors and resulting in approximately three thousand possible combinations for the base code. The signal processor responds to correct combinations of digital inputs with a drive signal.

Abstract: Ceramic dielectric coating compositions are disclosed as well as processes for depositing the coating compositions on a substrate and the coated article resulting therefrom. A ferroelectric or piezoelectric powder material such as the barium titanate type or lead zirconate-titanate type is mixed with a phosphate additive and water to form an acidic flowable mass with a consistency suitable for depositing by various means on a substrate. Depositing means include painting, dipping, spraying, and silk-screen techniques. After deposition on the substrate, the coating composition is dried, preferably at an elevated temperature, to form a composite article of the substrate with an adherent ferroelectric or piezoelectric coating composition thereon.