Abstract: A tapping strip retainer is provided which allows for horizontal adjustment of the strip relative to a fixed set of threaded fasteners so as to permit alignment of the threaded fasteners with appropriate tapped openings in said strip. The mounting members for the strip may be located in relatively inaccessible places without preventing effective adjustment of said strip.

Abstract: A knob assembly for use, either singly or in pairs, has portions of two shaped members seated in face-to-face relationship in an opening in an operating lever. One of said members has an extension which projects substantially across the axial end of the lever so as to protect said end of the lever.

Abstract: An apparatus for signalling an intended reverse operation of a mechanism having a shift lever selectively positionable in forward, neutral, and reverse positions prior to placement of the shift lever in the reverse position for effecting reverse operation. The apparatus includes an activating structure responsive to movement of the shift lever in the neutral position toward the reverse position for activating the control of a signalling device prior to reverse operation of the mechanism. The apparatus is adapted for use in signalling the back-up operation of a vehicle, such as a tractor, before the tractor starts in a reverse direction motion.