Abstract: There is disclosed apparatus for preventing explosive separation of a heavy spring loaded first portion of a parking brake chamber from a second portion thereof. A clamping band, typically secured by a fastener assembly, is provided at the interface between the two portions of the chamber to maintain them in operative engagement. The apparatus disclosed insures continued engagement upon accidental or inadvertent release of the clamping band under spring loading.

Abstract: An improved chart carrier for a recorder permitting use with a take-up spool for relatively long periods of time, and without the take-up spool for shorter periods of time, a cylindrical enclosure being employed for rolling and enclosedly retaining the used portion of the chart in a predetermined portion of the chart carrier.

Abstract: Circuitry operative to monitor input signals indicative of seat occupancy and seat belt usage from each of four different stations with a single, multiplexed detection circuit coupled through gating circuits to four antennae, each of which is associated with a particular station. A seat belt monitor circuit receives signals indicating seat belt usage produced by a seat belt switch associated with a particular station. Another monitor circuit receives the output of the detection circuit indicating seat occupancy and the output of the seat belt monitoring circuit indicating seat belt usage and processes this information to provide a warning control signal in response to either (1) one or more signals indicating only seat occupancy or only seat belt usage, or (2) unrelated signals indicating seat occupancy and seat belt usage, or (3) related signals indicating seat occupancy and seat belt usage but occuring in an improper sequence.

Abstract: An improved blower blade for electric motors is disclosed. The blower blade comprises from about 50 to about 75% polypropylene, from about 5 to about 10% glass fibers and from about 15 to about 45% inert filler.