Abstract: The technology can be embodied in a headrest that includes an enclosure that includes one or more acoustic transducers. The headrest includes a bar for mounting on a backrest of the seat, such that the mounted headrest is movable with respect to the backrest to different positions over an adjustable range. The bar includes one or more wires each of which is coupled to an electrical contact at one end, and an acoustic transducer at an opposite end, the one or more wires disposed within a hollow interior portion of the bar. The bar also includes an opening for permitting an electrical connection to be established between an electrical connector coupled to an external source, and the electrical contact coupled to the one or more wires. The connection is maintained over the adjustable range of the headrest by a mechanical bias on either the electrical connector or the electrical contact.

Abstract: The technology can be embodied in a headrest that includes an enclosure that includes one or more acoustic transducers. The headrest includes a bar for mounting on a backrest of the seat, such that the mounted headrest is movable with respect to the backrest to different positions over an adjustable range. The bar includes one or more wires each of which is coupled to an electrical contact at one end, and an acoustic transducer at an opposite end, the one or more wires disposed within a hollow interior portion of the bar. The bar also includes an opening for permitting an electrical connection to be established between an electrical connector coupled to an external source, and the electrical contact coupled to the one or more wires. The connection is maintained over the adjustable range of the headrest by a mechanical bias on either the electrical connector or the electrical contact.

Abstract: A door lock which can be operated electrically, remotely, or mechanically using a lever or a key. The lock utilized a blocking bar which engages or disengages a notch in a locking latch. When the blocking bar is engaged within the notch, the latch is positioned in a strike plate of a door frame thereby locking the door. When disengaged, the latch can be retracted from the strike plate thereby allowing the door to be opened.

Abstract: Rare earth chelate-conjugated oligonucleotides useful in nucleic acid hybridization assays and for generating chelate-labelled probes of any desired sequence are disclosed. The particular class of chelates utilized exhibit an unusually high efficiency of rare earth element capture, correlated with emission of a high level of signal in time-resolved fluorescence spectroscopy compared to other structurally related chelate compounds.