Abstract: Mechanisms are disclosed for actuating the conventional caliper brakes of bicycles by back pedalling the drive sprocket. In one embodiment, an overrunning clutch drives a cable drum which tensions an actuator cable for a caliper brake. In a further embodiment, a pawl riding on the drive sprocket of the bicycle extends a linkage which pulls a cable to actuate the caliper brake. In still another embodiment, a spiral gear is rotated upon back pedalling of the bicycle drive sprocket to tension a brake actuating cable.

Abstract: A level indicator which features a pendulum-style magnified dial and a versatile magnetic swing plate or base. The swing plate is pivotally and laterally moveable with respect to the main casing of the level indicator to provide a more stable and accurate adherence to the surface whose alignment is being checked. The magnetic surface of the swing plate cooperates with a coplanar magnetic face of a fixed-position heel plate to add further stability and accuracy. The level indicator features a hairline-bearing suspended mass in the form of a magnifying lens, the hairline being preferably scribed along its outer convex surface to eliminate parallax errors. The indicia-bearing dial plate may be edgewise illuminated by one or two light sources internally positioned and powered. Two substantially identical viewing faces are preferably provided to increase versatility.

Abstract: An alignment device comprising a plurality of hollow arcuate sections secured together at their inner edges so as to form a hollow center with a base support member, an aperture for admitting fluid and scalar indicia about the outer edges of the arcuate section. The device may be adapted to removably accept a rigid rod opposite said base, said rod being adapted for insertion into the chuck of a drill.