Abstract: A combined dirt collector and cutout cock (CDC & COC) device for a rail car control to prevent unintentional re-pressurization of the control valve and rail car braking system. The device has an inlet configured for interconnection to an air supply, an outlet configured for interconnection to a control valve of a rail car, a valve moveable between a first position where an inlet is connected to an outlet and a second position where the inlet is isolated from the outlet, and a control valve vent positioned downstream of the valve and configured to open in response to the valve being moved into the second position. The valve may include a ball having a first passageway for selectively connecting and disconnecting the inlet from the outlet and a second passageway formed therethrough that is positioned to interconnect the outlet with the vent when the valve is in the second position.

Abstract: A tremolo locking device for an electric guitar or similar stringed instrument has a lower part that is fastened to the guitar body and an upper part that can be pivoted by use of the guitarist's fingers into or out of engagement with an edge of the tremolo base plate. The upper part can have a threaded barrel member into which a knurled screw is adjustable to establish a gap or recess that engages the base plate.